DE69932952T2 - FIBER CLAD, ADHESIVE AND MANUFACTURING METHOD - Google Patents

Description

AREA OF INVENTION

The The present invention relates to nonwoven webs and to articles made therefrom Adhesive articles and in particular nonwoven web materials and adhesive articles, the improved tear properties exhibit.

BACKGROUND THE INVENTION

Nonwoven web materials become common as carrier or fabric component of tapes or the like is used. These bands are usually in the healthcare industry to attaching a variety objects like associations and hoses and as a carrier and fixing materials for prefabricated associations like first aid associations and isolated tissue composites (island-type dressings) used. They are also common as mounting materials on certain product types such as diagnostic electrodes, surgical grounding plates and monitoring electrodes used.

The tapes formed from nonwoven web materials fall on the basis of required Performance in two general categories. Class I includes sheet materials and tapes made from them which are torn in cross-machine or cross-machine direction can. However, you can these materials often do not are torn clean and therefore show uneven or irregularly torn Edge. In contrast, includes Category II those webs and tapes that are practical Either in the fabric down direction or in the fabric cross direction can be torn.

in the In general, Category I nonwovens predominate from cellulose fibers and have a tear strength ratio of Down web direction to the fabric transverse direction of less than 2.5 to 1.

cellulose fibers are unlike many synthetic polymer fibers used in the Essentially unbreakable, inherently fragile (i.e. are easily broken under stress).

The Cellulose fibers used in Category I sheetings are typically linked together by a chemical binder which immobilizes or partially immobilizes the fibers. moreover elevated the chemical binder determines the density of the sheet material and other advantageous properties such as increased tear strength, elongation at break, Hand (i.e., deformability), reduced linting and the specific ones noted above tear properties ready. However, these advantageous properties become fast impaired when the material gets wet and especially when it is with water or water-based fluids becomes.

materials Category II will be the most common formed from essentially unbreakable synthetic fibers and are either thermally, mechanically or chemically bound to the Layer materials to impart structural integrity. These materials can increased Tear resistance, Stretching, showing hand, which depend on their particular construction. To the Example are mechanically bound materials of category II typically softer and fuzzier compared with chemical bound materials that tend to be stiffer and less fuzzy to be. However, you can in almost all cases Sheetings of category II essentially not in the transverse direction of the fabric be torn and fulfilled hence not the mounting requirements of the healthcare industry.

Nonwoven web materials and tapes Both Category I and II are used in wound care and the attachment areas of medical devices in the Practice of health care appropriate extensive use. However, no material type could be due to their adhering to them restrictions clear advantages in broad areas of the healthcare market create.

materials Category I lacks water resistance and they can not provide sufficient strength while the softness, hand and / or adequate tear properties be preserved. The strength can be changed by changing the alignment ratios the fabric down direction to the fabric transverse direction of the fibers at the expense of rupture improved become. In addition, the strength can also be increased by increasing the Basic fiber content and weight improved at the expense of hand and tearing become.

Altering the properties of Category II sheetings with synthetic polymer fibers is even more limited. Reasonable good tearing can only be achieved by using fibers that the sheet materials and resulting tapes are very stiff, can be achieved. In this way, the fiber-to-fiber bonds are substantially trapped, thereby reducing the conformability of the fabric and providing a tear which is extremely difficult and unsatisfactory in terms of ragged edges and defects in crack straightness.

It In recent years, many attempts have been made to Properties of category I and II materials or nonwoven sheet materials and tapes with the desired Properties of materials of both category I and II provide. In this way different fiber types, -weights and weights of the nonwoven web material tried. moreover Various bonding techniques have been used, including bonding with chemical Sizing agent, physical swirling of the fabric (e.g., water jet swirling) and thermal bonding as used by heat embossing. See, e.g. U.S. Patent No. 4,973,513 (chemical bond with LAB), U.S. Patent No. 4,341,213 (chemical bond for increasing strength and flammability), U.S. Patent No. 4,772,499 (water jet fluidization and partially chemical bond), U.S. Patent No. 3,737,368 and U.S. Patent No. 3,507,943 (Heat embossing with Engraved rollers).

To the For example, U.S. Patent No. 3,121,021 discloses a surgical Adhesive tape, which consists of a fabric carrier made of rayon staple fibers with a non-tacky hydrophobic rubbery fiber sizing polymer is coated. The polymer bound carrier is with a thin layer Pressure-sensitive adhesive coated, which after drying a microporous structure having. The incorporation of the hydrophobic rubbery fiber sizing polymer serves to increase the water-repellent effect and thus the wet strength of this Category I materials. Likewise, the United States Patent No. 4,112,177, substantially the same nonwoven backing as US Pat. No. 3,121,021, however, several layers of adhesive are applied to the carrier, to improve the overall adhesive properties of the tape formed therefrom. Another example of a porous, Double coated adhesive tape is disclosed in U.S. Patent No. 4,844,973.

US Patent No. 4,292,360 discloses a multilayer nonwoven sheet material which can be used for producing pressure-sensitive adhesive tapes. The web materials consist of two fleeces, one above the other placed and by a remoistenable chemical binder connected to each other. The fleeces can be of any type or any combination of staple fibers, either alone or in combination with binder fibers. In addition to Chemical binders can be used Sheets can also be calendered or embossed.

US Patent No. 3,908,650 discloses a microporous tape formed of a nonwoven fabric, on one side with a porous pressure-sensitive adhesive layer and on the other with a porous one thermoplastic film is coated. The to the thermoplastic Layer adjacent fibers are at least reasonably water repellent. Optionally, the nonwoven fabric thermally bonded or with a Sizing agent be chemically bound. The use of thermoplastic Layer gives increased Abrasion and contamination resistance of the entire tape.

US Patent No. 4,772,499 discloses a nonwoven which is in the cross-machine direction easily ripped is. The tearability The tissue is covered by patterns that are parts of the tissue with a binder bind, increased. It it is stated that the tissue after drying in the transverse direction of the tissue is easily rupturable along the unbonded portions of the fabric. Also, the US patent publication No. 4,303,724 discloses the use of structured or false twisted yarns in the classification of nonwovens to improve their tear properties.

The German patent no. DE 1 595 300 discloses nonwoven fabrics formed from wet laid fabrics that are hot calendered while the fabric still retains 10 to 40% by weight residual moisture. These fabrics are comprised of unstretched polyester binder fibers and may optionally include stretched polyester fibers, polyacrylamide fibers and / or polyamideimide fibers. Other examples of thermal bonding as the main means of reinforcing nonwoven materials are also found in U.S. Pat. Nos. 4,731,277, 4,639,390, 4,511,615, 4,490,427, and 4,083,913. In addition, thermal bonding may be effected by embossing such webs using heated gravure rolls. See, for example, U.S. Patent Nos. 3,737,368 and 3,507,943.

U.S. Patent No. 4,490,425 discloses a soft and fluffy nonwoven fabric formed by heat bonding staple fibers, continuous filaments or both, and needling (ie stitching) one or both sides of the fabric to form the fluffy surface. After that, one or more of the pages coated with a hot-melt adhesive to obtain a fabric to be used as intermediate lining in various garments. Similar feedstocks and methods for their preparation are also disclosed in US Pat. Nos. 4,451,314 and 4,148,958.

None the sheet materials or ribbons described above combined successfully exploiting the advantages of Category I and II materials, while their shortcomings were eliminated. Indeed does not have a single nonwoven web material or one from it manufactured band increased Strength, increased Sticking and ease of tearing in any direction on, while adequate hand values are preserved.

SUMMARY THE INVENTION

The The present invention provides nonwoven sheet materials and molded therefrom bands ready with fibers, preferably stretched, unbreakable Staple fibers and binder fibers produced and made of a combination on joining, smooth-roller calendering and pattern embossing techniques are formed. These sheet materials are in particular as tape carriers useful, in the cross-machine direction and web-down direction within the requirements the user company can be torn with his fingers and also a number at others desired Features, including e.g. acceptable tear resistance and improved sticking, own.

One Aspect of the present invention provides a pressure-sensitive adhesive article ready, comprising a non-woven backing with a first surface and a second surface; and one on the first surface of the carrier coated pressure-sensitive adhesive, wherein the carrier is an embossed pattern on a nonwoven fabric. According to the invention, the embossed pattern selected from the group consisting of at least two rows of multiple wells in a first direction aligned such that columns formed from the plurality of wells in a second direction be a distance between two wells in a column opposite to a Distance between two wells in a second column varies and at least two rows of multiple wells in a first one Direction are arranged, the columns of the plurality of wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies, and where the multiple pits in each row and a series of alternate "+" and "-" characters or a series of "+" characters Inventive pressure-sensitive adhesive article can also apply a low-adhesion backsize composition on the second surface of the wearer, and / or a release liner on the pressure sensitive adhesive applied to the first surface of the wearer, lock in. Typically, the pressure-sensitive adhesive is selected from the group consisting a rubber-based adhesive, a water-based adhesive, a solvent-based adhesive, a hot melt adhesive and a combination of them. An inventive pressure-sensitive adhesive article may also a carrier lock in, further comprising a second, preferably a laminated on the first web Includes fleece.

One Another aspect of the present invention provides a nonwoven web article ready, including embossed Pattern on a nonwoven fabric selected from the group consisting from at least two rows of multiple wells in a first Direction aligned so, the columns of the multiple Wells are formed in a second direction, with a Distance between two wells in a column opposite to one Distance between two wells in a second column varies and at least two rows of multiple wells in a first one Direction are arranged such that columns of several wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies, and the multiple wells in each Row further comprising a series of alternating "+" and "-" characters or a series of "+" characters.

In each of the articles of the invention includes the web preferably unbreakable staple fibers, binder fibers and a binder.

Preferably make the multiple pits up to 28% of the entire surface of the Carrier off.

Each of the plurality of pits may be in a shape selected from the group consisting of a diamond, a rectangle, a circle, an oval, a triangle, a "+" character, a "<" character, a ">" character, and Preferably, the distance between two successive recesses in a first direction is 0.51 mm to 0.36 mm, and the distance between them is two adjacent recesses in a second direction is 0.51 mm to 3.6 mm. Preferably, the first direction and the second direction are substantially perpendicular to each other.

In an embodiment Each of the plurality of recesses is in a row in a mold selected before from the group consisting of alternate "+" signs and "-" signs. In another embodiment For example, each of the plurality of pits is a "+" sign and the multiple pits approximately 15% to about 22% of the total surface area of the carrier. In yet another embodiment For example, the multiple pits are a combination of a "+" sign and a "-" sign and are the multiple wells 15% to 20% of the total surface area of the carrier. In a further embodiment For example, the multiple pits are a combination of a "-" sign and a "|" such that the plurality of Wells about 15% to about 22% of the total surface area of the carrier be. In yet another embodiment, the plurality Wells a combination of a "+" sign and a "-" sign, so the multiple wells 15 to 20% of the total surface area of the carrier be.

In In another aspect, the present invention provides a method for preparing a nonwoven sheet material including the Forms a statistically entangled nonwoven fabric from stretched unbreakable staple fibers and binder fibers; Pattern embossing of Non-woven fabric with a pattern selected from the group consisting from at least two rows of multiple wells in a first Direction aligned such that columns of the multiple Wells are formed in a second direction, with a Distance between two wells in a column opposite to one Distance between two wells in a second column varies and at least two rows of multiple wells in a first one Direction are aligned such that columns of the plurality of wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies; Smooth rolling calendering of the nonwoven fabric after the pattern embossing; and after calendering uniformly bonding the fibrous web everywhere under Use of a chemical binder.

Yet Another aspect of the present invention provides a method for preparing a nonwoven sheet material including the Forms of a statistically entangled nonwoven fabric from stretched, unbreakable staple fibers and binder fibers; first smooth-roll calendering the fiber web; pattern embossing of the nonwoven fabric having a pattern selected from the group consisting from at least two rows of multiple wells in a first Direction aligned such that columns of the multiple Wells are formed in a second direction, with a Distance between two wells in a column opposite to one Distance between two wells in a second column varies and at least two rows of multiple wells in a first Direction are aligned such that columns of the plurality of wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies; and providing even connections everywhere in the world Nonwoven fabric using a chemical binder, wherein the Smooth-roll calendering prior to pattern embossing or providing uniform connections is performed. In another embodiment will provide even connections before the pattern embossing carried out. In another embodiment will emboss the pattern performed before providing even connections.

Preferably For example, the step of providing connections comprises infusing of the nonwoven fabric with a water-based chemical binder.

One inventive method can also dry with the chemical binder based on water infused fiber web until removal of the substantially including all water.

Other Steps in the process of the invention can be included shut down applying a pressure-sensitive adhesive layer to a first surface of the with an embossed Pattern provided fabric, applying a low-adhesion backsize on a second surface of an embossed one Patterned fabric, rolling up with an embossed pattern provided with the pressure sensitive adhesive on the first surface of the with an embossed Pattern provided fabric with the low-adhesion backsize on the second surface of an embossed one Patterned tissue is in contact and a combination thereof one.

Yet another aspect of the present invention provides a method of making an adhesive adhesive article, including forming a first randomly entangled nonwoven fabric; Smooth-roll calendering of the non-woven fabric; Patterning the nonwoven fabric to form an embossed pattern comprising a plurality of discontinuous depressions in a first direction and a second direction; Providing uniform bonds throughout the nonwoven fabric using a chemical binder; and coating a first surface of the fibrous web with a pressure-sensitive adhesive, wherein the pressure-sensitive adhesive article has an adhesive rating of less than 76 mm. A method may also include other steps such as laminating a second fibrous web onto the first fibrous web and applying a low adhesion backsize to a second surface of the fibrous web.

In an embodiment finds the pattern embossing of the fibrous web prior to the smooth-roll calendering of the fibrous web and providing uniform connections held in the fiber fleece. In another embodiment, the smooth-roll calendering takes place the nonwoven fabric before the pattern embossing of the nonwoven fabric and the Providing uniform connections held in the fiber fleece. In yet another embodiment, the providing is of uniform connections in the fiber fleece before the pattern embossing the fibrous web instead.

The Terms "machine direction" and "web down direction" become interchangeable used and denote the longitudinal direction of the tissue. The fibers comprising the nonwoven sheet material are predominant in the fabric downward direction of the nonwoven sheet material oriented. The terms "cross-machine direction" and "cross-machine direction" are interchangeable here used and denote a direction that is approximately perpendicular to the Down web direction of the nonwoven sheet material.

As used here are "embossed pattern" and "calendered Pattern "interchangeable used and denote a predetermined configuration of recesses on the surface of the tissue. An embossed Pattern differs from a "perforated" pattern, which denotes a predetermined configuration of holes, through go through the entire thickness of the tissue. Consequently, an embossed pattern on a fabric / tape backing according to the invention non-perforated pattern of depressions in the surface of the Fabric, so that the pattern is preferably in both the fabric-down also the transverse direction of the fabric is discontinuous.

SHORT DESCRIPTION THE DRAWINGS

1 is a schematic diagram of an embodiment of an embossed substrate according to the invention.

2 is a schematic diagram of another embodiment of an embossed carrier material according to the invention.

3 is a schematic diagram of another embodiment of an embossed substrate according to the invention.

4 is a schematic diagram of still another embodiment of an embossed substrate according to the invention.

5 is a schematic diagram of another embodiment of an embossed carrier material according to the invention.

6 Figure 3 is a schematic diagram of an embossed substrate including a series of discontinuous lines along a transverse fabric direction of the material.

7 Figure 3 is a schematic diagram of an embossed substrate including a series of intersecting continuous lines along both the tissue transverse and tissue downstream directions of the material.

DETAILED DESCRIPTION OF EMBODIMENTS THE INVENTION

Nonwoven web materials

The nonwoven component of the nonwoven sheet materials and tapes of the invention is dried according to conventional methods known in the art, including wet-laid techniques padding processes such as air laying and carding and direct padding processes for continuous fibers such as spunbonding and meltblowing. Examples of various methods are disclosed in copeland US Pat. Nos. 3,121,021, Hansen, 3,575,782, 3,825,379, 3,849,241, and 5,382,400.

One suitable example for a nonwoven component may include stretched unbreakable staple fibers and Binder fibers are used in the formation of nonwoven components of the Nonwoven web materials and tapes the present invention as disclosed in U.S. Patent No. 5,496,603; 5,631,073; and 5,679,190 all to Riedel et al. described, used. As used here means "stretched unbreakable staple fibers "staple fibers, which are made of synthetic polymer, which during the Are drawn so that the polymer chains in the essentially in the machine direction or web down direction Align fiber and that they will not break easily if they are one moderate refractive power get abandoned. The controlled orientation of these staple fibers gives a high degree of polymer chains comprising the fibers at ordered crystallinity (e.g., generally an over about 45% crystallinity). In general, the stretched unbreakable staple fibers break of the present invention until they have a refractive power of at least 3.1 cN / dtex (3.5 g / den).

Not restrictive examples for suitable, stretched, according to the invention, unbreakable staple fibers include polyester staple fibers, Polyolefin staple fibers, polyamine staple fibers, polyacrylate staple fibers, Polycarbonate staple fibers, polysulfone staple fibers and combinations one of them. According to the invention a small Amount of fragile staple fiber, preferably less than 50 % By weight, such as rayon staple fibers, acrylic staple fibers, cellulose staple fibers, Cotton staple fibers and the like.

Preferably include the stretched unbreakable staple fibers oriented Polyolefin staple fibers, such as oriented polyethylene, polypropylene or polybutylene staple fibers, oriented polyester staple fibers such as polyethylene terephthalate (PET) or combinations thereof. These oriented staple fibers have a length of preferably about 1 cm to about 10 cm, stronger preferably 2 cm to 5 cm and show a quality of about 0.09 dtex to 18 dtex (0.1 denier to about 20 denier), more preferably about 0.45 dtex to 4.5 dtex (0.5 denier to about 5 denier) and more preferably about 0.6 to 1.8 dtex (0.7 denier to about 2 denier).

In a particularly preferred embodiment include the stretched unbreakable staple fibers oriented Polyester staple fibers such as polyester staple fibers (PET) at 0.86 dtex (0.95 Den) or standard polyester staple fibers (PET), polyester staple fibers 1.1 dtex (1.2 denier) and / or standard polyester staple fibers PET with 1.8 dtex (2.0 denier).

Everyone Type or all types of binder fibers may be used to form the fibrous web used in the present invention, as long as they comply with the stretched, unbreakable staple fibers of the nonwoven fabric without Breaking or essentially weakening the stretched, unbreakable Staple fibers can be melt-bonded. In this regard is it prefers that the binder fibers from one or more artificial thermoplastic polymers are formed with those in the nonwoven web materials and ribbons used, stretched, unbreakable Staple fibers can be melt-bonded. In addition, the binder fibers a wide variety of binder fiber configurations known in the art including, without restriction, Completely fusible binder fibers, side-by-side binder fibers, bicomponent binder fibers, elliptical core sheath binder fibers, concentric core sheath binder fibers or combinations thereof.

Examples for suitable Close binder fibers without restriction Polyester binder fibers, polyolefin binder fibers such as thermoplastic Polyethylene, polypropylene and Polybutylene binder fibers, polyamide binder fibers or combinations one of them. These binder fibers preferably have a length of about 1 cm to about 20 cm, stronger preferably 2 cm to 10 cm and show a quality of about 0.09 to 18 dtex (0.1 denier to about 20 denier), stronger preferably from about 0.18 to 9 dtex (0.2 denier to about 10 denier) and more preferably from about 0.45 to 5.5 dtex (0.5 denier to about 6 Den) up.

In a particularly preferred embodiment For example, the binder fibers include core sheath binder fibers, e.g. one oriented polyester or polyolefin fiber core, the from an outer coat of a fusible polyester or polyolefin resin is surrounded. specific Examples of suitable core sheath binder fibers for use in The nonwoven fabrics of the present invention include crystalline ones Polypropylene core and meltable polyethylene sheath with 1.4 dtex (1.5 denier), 38 mm; and oriented polyester core and fusible Polyester jacket with 1.8 dtex (2 denier), 38 mm, one.

The weight ratio of stretched, unbreakable staple fibers to binder fibers in the fiber The method depends on the application to which the nonwoven sheet materials or tapes of the present invention are applied. In most cases, the predetermined strength, tearability, and other requirements of the nonwoven sheet materials and tapes of the present invention can be adjusted by adjusting the amounts of high strength, drawn, unbreakable staple fibers to the amount of thermoplastic binder fibers necessary for adequate bonding and ultimately for the structural integrity of the binder Fiber fleece needed to be obtained.

in the Generally, about 95% to about 50% by weight, preferably about 90% to 60% by weight of the nonwoven fabric of one or more Varieties of stretched unbreakable staple fibers include, while about From 50% to about 5%, preferably from about 40% to about 10 wt .-% of the nonwoven binder fibers. In a preferred Aspect is the weight ratio from stretched, unbreakable staple fibers to binder fibers about 10: 1 to about 1:10, stronger preferably about 5: 1 to about 1: 1, and more preferably about 4: 1 to about 2: 1.

The thickness of the nonwoven web materials according to the invention depends largely on the desired use. In general, a nonwoven web may have a thickness of about 0.04 mm to about 0.5 mm. If the desired end use of the nonwoven sheet material is a medical tape backing, a preferred thickness is about 0.1 mm to about 0.4 mm. In addition, the weight of the nonwoven web can be about 10 g / m ² to about 100 g / m ² , preferably about 15 g / m ² to about 70 g / m ² .

In a preferred embodiment, a nonwoven web includes about 60% by weight of an oriented polyester staple fiber of about 0.86 dtex (0.95 denier), 4 cm long, combined with about 20% by weight of a polyester binder fiber of about 1.8 dtex (U.S. 2 denier), 5 cm in length and about 20% by weight of about 1.4 dtex (1.5 denier), 4 cm long rayon fiber having a mean total fiber weight of about 30 g / m ² .

The second preferred embodiment, a nonwoven fabric, comprises substantially the same material as the first embodiment but, rather than the rayon fiber, includes about 20% by weight of about 2 dtex (2.2 denier), 4 cm length polypropylene fiber having a total average fiber weight of about 30 g / m ² .

According to the principles of the present invention, the nonwoven fabric is a chemical Binders, linked by physical swirling or both and is for obtaining the nonwoven sheet materials of the present invention pattern embossed.

One A method of bonding the fibrous web is to retard the fibers the formation of the tissue by conventional in the art to physically swirl known means. For example, that can Fibrous web as described in U.S. Patent No. 5,016,331, Needle-stitched. In an alternative and preferred method For example, the nonwoven fabric described in U.S. Patent No. 3,485,706, be vortexed water. Such a method of water jet whirling refers to passing a wire between stainless steel wire mesh screens (e.g., a 100 mesh wire screen, National Wire Fabric, Star City, Ark.) Layered nonwoven fabric at a predetermined speed (e.g., about 23 m / min) through high pressure water nozzles (e.g., from about 3 MPa to about 3 m / min) about 10 MPa) impinging on both sides of the fabric. After that The water-jet-twisted fabrics are dried and can the pattern embossing and the saturation with chemical binder as described herein.

All nonwoven sheet materials according to the invention are in accordance with the methods known in the art, such as those described U.S. Patent Nos. 2,464,301, 3,507,943, and 3,737,368. In general For example, the nonwoven fabric is passed through a patterned (e.g., gravure) metal roll with raised and lowered recessed areas and one, generally of metal or rubber formed, solid back-up roll directed. However, the nonwoven fabric can also be between two pattern rolls, show the corresponding or alternate engraved areas are supplied. In any case, it is typical to add heat to one or more of the rolls, so that the nonwoven fabric is heat bonded along the points of pattern contact becomes.

In a preferred embodiment, the nonwoven fabrics according to the invention are heat embossed with a pattern roll and a fixed counter roll. During embossing, it is important to tightly control the temperature of the pattern roll. In general, the temperature must be such that the drawn, unbreakable staple fibers and binder fibers are fused together at the contact points without breaking the staple fibers (ie, perforating the staple fibers) or severely weakening the fibrous web below a usable degree of strength. In this regard, it is preferred to maintain the temperature of the pattern roll between about 70 ° C and 220 ° C, more preferably between about 85 ° C and 180 ° C. In addition, the pattern roll should the nonwoven sheet material with a pressure of about 30 N / mm to about 120 N / mm, before Preferably contact about 35 N / mm to about 70 N / mm.

The certain on the embossing roll engraved pattern hangs from the intended use of the resulting nonwoven sheet materials and ribbons from.

Of the One skilled in the art recognizes that a variety of pattern forms are patterned Area leads (i.e., bond area) as long as a discontinuous embossed pattern in the material / tape carrier produced after embossing becomes. It is according to the invention preferred that the resulting embossed pattern in the material / tape carrier a Bonding area to about 28% of the total surface area of the material / tape carrier has. Stronger preferably it is desirable a patterned range of about 15% to about 21% of the total surface area of the material / tape carrier to achieve.

While it not wanted is to be bound by a certain theory, it is believed that the depressions in the embossed Pattern by fleece isolated melting in pattern of raised areas the pattern embossing roll be formed. The non-woven fabric is not destroyed by the method, but reserves instead, his integrity. The physical dimensions of the embossed depressions and not depressed Area between each well (also referred to herein as "land space") important aspects of the present invention. Together they can Depressions and the land space between each well a dividing line form, wherein a dividing line in the transverse direction of the fabric and in the Down web direction may be present. An acceptable balance, must be between the competing interests of adequate tear strength to prevent premature separation (i.e., tearing) and sufficient tear strength reduction to allow easier and more stable Separation along a single dividing line, both in cross-section as well as in tissue down direction, be achieved. Surprisingly found that an embossed Pattern in a material / tape carrier of up to 28% of the total surface area of the material / tape backing this Equilibrium in both the tissue transverse and tissue direction Fulfills.

moreover these are the parameters necessary to define the execution the dividing lines around the dimple dimensions (e.g., length and Width), the land area dimensions (typically the length of the not depressed Area between two consecutive wells) and the ratio of Dimple dimensions to the land dimensions. Independence these variables and the collaborative way in which they work the efficiency of the material / tape carrier effect, require a common consideration. The expert recognizes easily, that each depression in the embossed pattern a variety Shapes and still have a slight and consistent separation along a single dividing line, both in the tissue transverse and tissue downstream directions having. Such shapes include diamonds, squares, rectangles, Triangles, circles, ovals, a letter form (e.g., a letter such as "V", "X", "A", and the like, and a character like "+", "-", "<", ">", and the like) and combinations thereof.

The tear strength an embossed one Pattern in the material / tape carrier in the fabric down direction, measured according to this set out in the Protocol desirably at least about 8 N / cm width, preferably at least about 10 N / cm width. The tear strength an embossed one Pattern in the material / tape carrier in the transverse direction, measured according to the here set out in the Protocol desirably at least about 4 N / cm width, preferably at least about 6 N / cm width.

The invention includes an embossed pattern preferably a plurality of depressions through a land area are separated in a first direction and a second direction. Preferably the arrangement of the plurality of depressions in the first direction at least two rows aligned so that columns through successive depressions formed in a second direction become. In a preferred configuration, a distance varies between two recesses in at least one column along the first direction. In another preferred configuration, a distance varies between two wells in a column from a distance between two wells in a second column.

In another embodiment of the invention, a multilayer laminate (ie, two or more layers) may be formed. The laminate comprises the nonwoven web of the invention. In a preferred embodiment, the laminate consists of two layers of nonwoven web material bonded together by an adhesion promoter. The primer may be any substance that provides a strong bond between the layers of nonwoven sheet material. The bond should be of sufficient strength so that when used as a tape construction, the layers of the nonwoven web material can not delaminate and can not be separated by hand. Suitable adhesion promoters include polypropylene, polyethylene, Ethylene vinyl acetate and mixtures thereof, but are not limited thereto. A preferred adhesion promoter is polypropylene in the form of a film such as a blown XBP-486.0 from Consolidated Film, Chippewa Falls, WI at 0.4 mm and an extruded film from Exxon 3445 polypropylene pellets from Exxon Chemical Co., Houston, TX.

additives can in one or more of the nonwoven sheet materials, the chemical Binder, the adhesion promoter, the LAB and the adhesive introduced become. Suitable additives include colorants (i.e.

pigments and dyes), processing aids (e.g., surface active Agents and foaming agents) and flattening agents (e.g., fillers and glosser), to name a few.

Regarding 1 is an embodiment of an embossed pattern 11 on a material / tape carrier 10 shown. The embossed pattern 11 includes several depressions 12 in the form of a "+" sign 14 separates every well 12 , both in a web down direction 13 as well as a transverse fabric direction 15 , Preferably, the arrangement is the plurality of wells 12 in a first direction (eg, in a fabric transverse direction) in at least two rows 17 which are oriented such that columns 18 through successive wells 12 in a second direction (eg, a web down direction 13 ) are formed. Preferably, each row 17 and every pillar 18 essentially at right angles to each other. Through the land areas 14 separate consecutive wells 12 form a tissue downline 16 (ie along a column 18 at depressions 12 ) and a tissue cross-section 16 ' (ie along a row 17 at depressions 12 ). Upon application of a tear force, the material / tape backing may travel along the fabric down-cut line 16 and the fabric cross-section 16 ' to a desired size 10 ' be torn. As mentioned above, it is the cooperative relationship between the dimple dimensions 12 and the land areas 14 which provides easy and consistent separation along a single parting line in both the tissue transverse and tissue downstream directions. For example, in 1 the "+" sign of each well 12 the dimensions are: a total height of about 0.91 mm, a total width of about 0.51 mm, each of the segments in the "+" having a thickness of about 0.20 mm in both the fabric down and the fabric transverse direction For example, the land space between each depression in the fabric downstream direction is 0.36 mm and 0.76 mm in the cross-machine direction, and this embossed pattern results 11 to a total patterned area of about 15.4% of the total area of the material / tape substrate. Thus, in this configuration, a distance between two wells in at least one pillar varies along the first direction.

Regarding 2 is another embodiment of an embossed pattern 20 shown. The embossed pattern 20 includes several depressions 22 and 22 ' in the form of a "-" sign alternating along its length from a web downward direction 23 to a transverse fabric direction 25 aligned. A land area 24 share each well 22 both in a web down direction 23 as well as a transverse fabric direction 25 , Preferably, the arrangement is the plurality of wells 22 in a first direction (eg in a cross-machine direction) 25 ) in at least two rows 27 which are oriented such that columns 28 through successive wells 22 in a second direction (eg, a web down direction 23 ) are formed. Preferably, each row 27 and every pillar 28 essentially at right angles to each other. In 2 has the "-" sign of each well 22 the following dimensions: a longest dimension in the cross-machine direction of about 0.71 mm and a shortest dimension in the cross-machine direction of about 0.20 mm (resulting in an orientation of "-" of the recess, when viewed along the fabric downward direction) "|" Sign of each well 22 ' has the following dimensions: a longest downstream dimension of about 0.76 mm and a shortest downstream dimension of about 0.20 mm (resulting in an "" orientation of the pocket when viewed along the fabric downward direction) is the land space between each well 22 ' in the tissue down direction about 0.51 mm and about 1.07 mm for each well 22 , Every well 22 ' and 22 are spaced at a distance of about 0.18 mm in the cross-machine direction. This embossed pattern leads together 20 to a total patterned area of about 18.6% of the total area of the material / tape backing. Thus, in this configuration, a distance between two wells in a column varies from a distance between two wells in a second column.

Regarding 3 is yet another embodiment of an embossed pattern 30 shown. The embossed pattern 30 includes several depressions 32 in the form of a "+" sign 34 separates every well 32 both in a web down direction 33 as well as in a transverse fabric direction 35 , In 3 has the "+" sign of each well 32 the overall dimensions and width are approximately 0.91mm, with each segment in the "+" having a thickness of approximately 0.20mm in both the web and web direction, and the land space between each Depression in the fabric down and the fabric transverse direction about 0.36 mm. This embossed pattern leads together 30 to a total patterned area of about 20.5% of the total area of the material / tape backing.

Regarding 4 is another embodiment of an embossed pattern 40 shown. The embossed pattern 40 includes several depressions 42 which are in the form of a "+" sign and a "-" sign in an alternating pattern in the cross-machine direction. Preferably, the same character is aligned in the fabric downward direction. A land area 44 separates every well 42 both in a web down direction 43 as well as a transverse fabric direction 45 , In 4 indicates the "+" sign in the embossed pattern 40 the dimensions are: a total height and width of about 0.91 mm, each of the segments in the "+" having a thickness of about 0.20 mm in both the web-wise and cross-web directions embossed patterns 40 has the following dimensions: a longest dimension of about 0.91 mm and a shortest dimension of about 0.20 mm. In addition, the land space between each depression in the tissue downstream direction and the tissue transverse direction is about 0.36 mm. This embossed pattern leads together 40 to a total patterned area of about 16.0% of the total area of the material / tape backing.

Regarding 5 Yet another embodiment of an embossed pattern is shown. This embossed pattern 50 is a similar pattern as the one in 4 so that the pattern is a combination of land areas 54 separate "+" and "-" wells 52 , is in contact with any of the above 4 dimensions described. However, the embossed pattern became 50 at an angle 57 of about 30 ° from the transverse direction 55 turned. Although shown as a 30 ° turn, any pattern can be rotated at any angle less than 90 ° from the cross-machine direction.

According to the invention Nonwoven preferably using a smooth roller against a another smooth roll is clamped, calendered. Consequently, in a preferred embodiment the fiber webs according to the invention with a smooth roller and a fixed counter-roller (for example a metal, Rubber or cotton covered with cotton) in addition to Thermal embossing described above is thermally calendered. While of calendering it is important to know the temperature and pressure of the Smooth rolling to control. In general, the fibers are on the contact points thermally welded without the nonwoven unwanted properties, how to give unacceptable stiffness and / or weak sticking. In this regard, it is preferable to control the temperature of the burnishing rollers between about 70 ° C and 220 ° C, more preferably between about 85 ° C and 180 ° C to keep. In addition, the smooth rollers should be the nonwoven fabric with a Pressure of about 10 N / mm to about 90 N / mm, more preferably about 20 N / mm to about 50 N / mm contact.

While it not wished is to be bound by a certain theory, it is believed that Straight roll calendering further reduces the tear strength of the nonwoven fabric elevated and a variety of material / tape carrier properties, including sticking, elevated. There are many factors in the medical tape environment of importance, such as adhesion of the tape on its back (also referred to here as "sticking") the curl Tape edges after applying the tape to the skin (a function of conformability) and the same. It was surprisingly found that tape carrier, by a process comprising a smooth-roll calendering step includes, are made, a very straight separation in both the down-and-down also in the fabric transverse direction when torn and increased adhesive power, exhibit.

As mentioned above, The nonwoven fabric is preferably with a binder, here too referred to as "resin bond", applied. According to the invention, a Variety of chemical binders on the fiber webs through applied to the art. Non-limiting examples for useful close chemical binders Acrylics, vinyl acrylate, acetate / ethylene, polyvinyl acetate, polyurethane and the like. Whenever a chemical binder is used if it has an affinity for it and with the stretched unbreakable staple fibers and / or Binder fibers comprising the nonwoven fabric, easily bind.

It is preferred that the chemical binder comprises a water-based chemical binder including, but not limited to, latex-introducing acrylics, styrene / butadiene rubbers, vinyl acetate / ethylene, vinyl acetate / acrylates, polyvinyl chloride, polyvinyl alcohols, polyurethanes, vinyl acetates, polyacrylic / vinyl acetate, a styrene / acrylic and the like. These waterborne chemical binders are typically applied at about 20% to about 50% solids to the web, using any ge suitable application methods, including wire-wound rod, reverse roll, air knife, direct and offset engraving, scraper, pressure bonding, foam and spray application method applied.

specific examples for chemical according to the invention Close the binder without limitation, those under the brand names RHOPLEX E-3636 and E-3522 (each a styrene / acrylic latex binder with about 50% solids), RHOPLEX E-2559 (an acrylic latex binder at about 52% solids), all from Rohm & Haas Co., Philadelphia, PA), Type 4402 (a styrene / butadiene rubber latex at about 50% solids; Mallard Creek Polymers, Charlotte, N.C.) and National Starch No. 78-6283 (an acrylic / vinyl acetate copolymer latex at about 45% solids; National Starch Corp., Bridgewater, N.J.), with National Starch. No. 78-6283 are available.

The Chemical binder is applied in quantities sufficient are the ones you want Properties, such as tear resistance and tear properties, set forth by the nonwoven sheet materials and tapes of the present invention, provide. However, the amount of chemical binder used vary according to the intended use. For example, more can be done chemical binder can be applied to the strength of the To increase nonwoven material, while less binder can be used to hand (i.e., improve the conformability) to lower the material.

In general, when the nonwoven fabric is saturated with a chemical binder for bonding the nonwoven sheet material and the tape of the present invention, the weight of the chemical binder in the nonwoven fabric after drying is about 10 g / m ² to about 50 g / m ² , preferably about 15 g / m ² to about 40 g / m ² . In this regard, it is preferred that the weight ratio of fibers comprising the nonwoven fabric to the chemical binder incorporated into the nonwoven fabric be from about 5: 1 to about 1: 5, more preferably from about 3: 1 to about 1: 3, and most preferably about 2: 1 to 1: 2.

As mentioned above, includes a method for producing a material / tape support according to the invention following steps: resin bonding a nonwoven fabric, pattern embossing and Glattwalzenkalandrierung. In one embodiment, a preferred order of these steps: pattern embossing, smooth-roll calendering and resin bond. In yet another embodiment of the present invention Invention, the smooth roll calendering step is performed first. Then the smoothing roller calendering step is followed by either the pattern embossing step or the resin bond. Surprisingly It has been found that these preferred step sequences become one Material / track carrier to lead, the tear resistance and adhesive bonding without sacrificing straight web tear and fabric tear resistance. For example, surprisingly found these properties using one of the above step sequences, all improved as compared with a method including the following sequences: pattern embossing, resin bonding and smooth-roll calendering or compared with a method that pattern embossing and resin bond alone.

The Inventive nonwoven fabric Optionally, a water-based release coating, such as a low-adhesion backsize (LAB), essentially simultaneously or after introducing the chemical binder into the tissue contribute. Preferred useful LAB's include those described in US Pat No. 4,973,513 and are described by those described therein Procedures are applied. After the chemical binder and LAB is applied, the nonwoven fabric is using any suitable drying agent such as contact drying, Air circulation ovens, air impact ovens, through - air ovens and dried like.

bands

After this the nonwoven fabric for forming the nonwoven sheet material of the present invention Invention resin bonded, smooth roll calendered, and pattern embossed, can the sheets are wound up for transport or to multilayer laminates for later Applying an adhesive or other to form a tape used suitable coatings such as standard medical tapes, masking tapes and the like are processed. Alternatively, the nonwoven sheet material be conveyed directly to an adhesive coating device, followed by slitting in individual rolls of tape.

Preferably, the nonwoven sheet materials are coated with a pressure-sensitive adhesive layer to form the tapes of the present invention. In this regard, the pressure-sensitive adhesive applied to the nonwoven sheet materials may be solvent-based, water-based, or a hot melt adhesive. Suitable adhesives and their methods of application are described, for example, in US Pat. No. 2,708,192 (phenoli rubber-base cured adhesives), US Pat. No. Re. 24,906 (water-based and solvent-based adhesives) and US Pat. No. 4,833,179 (hot melt adhesive).

In an embodiment are the nonwoven sheet materials of the present invention with high strength latex adhesive adhesives coated, which are insensitive to moisture while they are also an excellent balance of adhesive properties, how high docility and high shear without adhesive build up, show. See, e.g. US Patent Nos. 5,521,229 and 5,624,973 both to Lu et al. and EP patent no. 554 832 B to Crandall, et al. For general methods for making these types of adhesives. The properties and advantages of the preferred pressure sensitive adhesives are at least in part from the presence of a polymerizable surfactant and a hydrophobic polymer having a low molecular weight in the Latex formulation.

The preferred to the nonwoven sheet material of the present invention applied latex adhesives are by emulsifying a Mixture of water, acrylate and vinyl monomers, ionic copolymerizable surfactants Agent, optionally chain transfer agent, optionally prepared crosslinking agent and hydrophobic polymer. The emulsion is stirred under nitrogen atmosphere then warm with initiator in parts to maintain temperature control treated. The reaction mixture is warmed and stirred until the reaction is complete is. The resulting acrylic latex may then be prepared according to a variety of conventional, The method known to the person skilled in the art can be applied.

The acrylate monomer component of the latex pressure-sensitive adhesive preferably comprises C ₄ to C ₁₂ alkyl ester acrylate monomers. Suitable acrylic ester acrylate monomers include, without limitation, N-butyl acrylate, amyl acrylate, hexyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, isononyl acrylate, decyl acrylate, dodecyl acrylate, and mixtures thereof.

In addition, the vinyl monomers combined with the acrylate monomers preferably include 1) vinyl esters including vinyl acetate, vinyl propionate, vinyl butyrate, and the like, but are not limited to 2) C ₁ to C ₄ acrylic esters of (meth) acrylic acid (including methyl methacrylate, methyl acrylate, ethyl acrylate, Ethyl methacrylate, isobutyl methacrylate, and the like, but not limited thereto), 3) styrene and mixtures thereof.

helpful copolymerized hydrophilic acidic monomers include those selected from ethylenically unsaturated Carboxylic acids, etylenically unsaturated sulfonic acids, ethylenically unsaturated Posphonsäuren and mixtures thereof, but are not limited thereto. Examples for such Close connections Acrylic acid, methacrylic acid, itaconic, fumaric acid, crotonic, citraconic, Maleic acid, β-carboxyethyl acrylate, 2-sulfoethyl methacrylate, styrenesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, vinylphosphonic acid and however, are not limited thereto. Numerous combinations of these monomers, if desired, be used. Due to their availability and effectiveness in the strengthen Methacrylate pressure sensitive adhesives are preferred hydrophilic acid Monomers the ethylenically unsaturated Carboxylic acids, particularly preferably acrylic acid.

Examples for useful copolymerizable ionic surfactants in preferred Latex pressure-sensitive adhesive includes those described in WO 89/12618 are, but are not limited to, one. The ones described herein surfactants Means have a hydrophobic portion containing an alpha-beta-ethylenic unsaturation a hydrophilic moiety containing a poly (alkyleneoxy) segment and an ionic segment. The preferred copolymerizable surfactants Agent is the surfactant MAZON SAM-211 (PPG Industries, Inc., described as an ethylene polyalkoxyammonium sulfate, wherein the number of alkoxy groups is between about 5 and about 25, with a typical example having from about 15 to about 20 ethoxy groups).

Of the Latex pressure-sensitive adhesive may optionally further comprise a crosslinking agent, including, without restriction, multifunctional acrylates such as diacrylates, triacrylates and tetraacrylates, such as 1,6-hexanediol diacrylate, poly (ethylene glycol) diacrylate, poly (butadiene) diacrylate, Polyurethane diacrylates and trimethylolpropane triacrylate; 4-acryloxybenzophenone; divinylbenzene; and mixtures thereof. Also, optional Chain transfer agents such as carbon tetrabromide, mercaptans, alcohols and mixtures thereof be.

As noted above, the preferred latex pressure-sensitive adhesive includes a low molecular weight hydrophobic polymer. The term "hydrophobic polymer" as used herein means a water-insoluble polymer Useful hydrophobic polymers have an average molecular weight in the range of from about 400 to about 50,000, preferably from about 500 to about 20,000, more preferably from about 600 to about 10,000 on. Examples of useful non-copolymerizable hydrophobic low molecular weight polymers include those selected from the group consisting of polystyrene resins such as PICCOLASTIC A75, D125 and D150 available from Hercules Chemicals; Poly (methyl methacrylate) resin (PMMA); Polybutandien; Poly (alphametylstyrol); Butadienstyrolblockcopolymere; and rosin esters such as, but not limited to, FORAL 85 and 105, available from Hercules, and mixtures thereof.

Preferably use the adhesive coated tapes of the present invention also a detachable Layer covering the adhesive layer or a release coating, like a little sticky backsize (LAB); applied to the not adhesive side of the tape, to facilitate winding the tape in easy to use roles. Preferably, a LAB order on the non-adhesive side of the tape using in the Textile industry conventional Coating method applied.

It it is preferred that the LAB is a water-based composition however, solvent-based materials such as polyvinyl carbamate are included also useful. Suitable ingredients of the water-based LAB include, without limitation, polyethylenes, Fluorochemicals, acrylates, silicones, vinyl copolymers and combinations of these polymers with other polymers. For example, are acceptable in the tapes useful in the present invention LAB's in US patent no. 4,728,571 and U.S. Patent No. 4,973,513 to LAB Water-based described.

The Applicants invented surprising Nonwoven sheet materials and tapes formed therefrom of essentially unbreakable fibers that are in the cross-machine direction the web or tape can be made easily tearable (i.e. fragile) and still appropriate in use. moreover can these materials and ribbons also a number of other advantageous properties, including increased tear strength, tearability, increased Stick on and a uniformity the strength in both the fabric down and in the Tissue transverse direction, exhibit.

typically, have to Nonwoven web materials or ribbons sacrifice certain qualities in favor of others. For example have to for obtaining a tape which is tearable in the fabric transverse direction (e.g. a category I band) the entire band strength and in particular convention. Likewise, go a band with good tear resistance (e.g., a Category II tape), the tearability and often the conformability lost. That's why bands are category I and II frequently limited in their application. Conversely, the nonwoven web materials and tapes should be present invention everywhere in the field of health care and everywhere else, where a firm, adequate and easily ripped Band is required to find a broad application. In particular, combine the nonwoven web materials and ribbons The present invention provides the tear strength benefits in the web down and cross web direction of typical Category II materials by hand (i.e., conformability) and tear advantages in downhill and cross-machine direction of typical Category I materials, materials with broad applicability in the health field, Athletics or other areas.

The special tear properties the nonwoven sheet material or ribbon of the present invention according to the in the example sections described below rated.

EXAMPLES

These Invention is illustrated by the following examples, which are the scope of Not to limit the invention further illustrated. In this example, all parts, conditions and percentages are by weight unless otherwise specified.

TEST PROTOCOLS

tear strength

ASTM Test Method No. D3759-83 was prepared using a meter commercially available from Brand name THWING-ALBERT TESTER Model EJA / 2000 by Thwing-Albert Company, Philadelphia PA, a 2.54-width sample cm, a gauge length of 12.7 cm and a crosshead speed of 12.7 cm / min. carried out. For each tested Sample, the maximum force applied to the test sample was recorded, around the tear strength value to get at the point of breakage.

hand

The total hand measurement in grams of a nonwoven material sample a measure of the drape / conformability of the sample. These materials with a relatively high hand value are stiff and not customizable. Conversely, relatively low hand values reflect soft, customizable materials again. The for The hand values recorded on samples of this invention were recorded a THWING-ALBERT HANDLE-O-METER Model No. 211-300 (Thwing-Albert instrument Co., Philadelphia, PA) according to the in outlined in the instruction manual, with model number 211-300 included, receive. All hand measurements were made on square sheetings performed with about 20 cm.

Stick on

A "bottom" row of tape strips of 5.08 cm × 25.4 cm was made by rolling the strips once, with the adhesive side down, back and forward with a scooter of 10 kg on a clean horizontal platform glued from Plexiglas. An "upper" row of tape strips (taken from the same batch of samples as the "bottom" row) of 2.54 cm and 25.4 cm was with the adhesive side down on top of the "bottom" row of test strips placed. The upper stripes were side by side across the Width of the lower strips with an extension of 2.54 cm over the centered on the lower strip. A weight of 3 g was then on each of the extended ones The ends of the upper strips are applied and the strips were once Backwards and forward rolled with the scooter. The weighted ends of Each upper tape strip was pulled down until the skin of the backs the lower band strip a 0 mark on the plexiglass deck reached. The platform was then placed in a room with a constant Temperature or humidity of 40 ° C 75% relative humidity moved and positioned upright at an angle of 20 ° from the vertical, so that the weights hung free. After an hour, the distance became an "upper" ribbon of peeled off an anchored "bottom" tape strip as the "sticky" value recorded for this tape sample.

Crack

Tear test in transversely

A Sample with 7.6 cm (transverse direction) by 10.2 cm (machine direction) a carrier or bands was in the middle of the length of 10.2 cm with your thumb and index finger of each hand at a distance of not more than 1.3 cm held. The sample was then placed in opposite directions by moving the hands Directions from each other and perpendicular to the transverse plane of the Sample torn until the crack continues through the ends of the sample would have. It was believed that the rate of crack propagation was about 7.6 cm per second. A metric ruler was used to measure (in millimeters) of the maximum distance that the crack of a straight line deviated, used.

Tear test in machine direction

A 7.6 cm (transverse) and 30.5 cm (machine direction) sample a carrier or bands was in the middle of the length of 7.6 cm with the thumb and index finger of each hand at a distance of not more than 1.3 cm held. The sample was then placed in opposite directions by moving the hands Directions from each other and perpendicular to the machine direction plane The sample is torn until the crack passes through the ends of the sample had continued. It was assumed that the speed the crack propagation was about 7.6 cm per second. A metric Ruler was used to measure (in millimeters) the maximum distance, which the crack deviated from a straight line used.

Carded fleece (fabric A)

A carded web used as the starting material in the following examples was made on a machine, commercially available under the trade designation HERGETH RANDOM-CARD from Hergeth-Hollingsworth GmbH, Dülman, Germany, using conventional web forming techniques. The fiber blend included:
60% polyethylene terephthalate (PET) staple fiber (0.86 dtex (0.95 den) x 3.8 cm, L-70, Hoechst Celanese Corp., Spartanburg, SC),
20% rayon staple fiber (1.4 dtex (1.5 denier) x 4.0 cm, Merge 8649, Lenzing, Charlotte, NC), and 20 bicomponent PET thermal bonding fibers (1.8 dtex (2.0 denier) x 3) , 8 cm, T-254, Hoechst Celanese Corp., Spartanburg, SC).

The resulting carded web had a fiber basis weight of 30 g / m ² and is referred to as "Fabric A" in the following examples.

Carded fleece (fabric B)

Another carded web used as the starting material in the following examples was made on a HERGETH RANDOM-CARD machine from Hergeth-Hollingsworth GmbH, Dülman, Germany, using conventional web forming techniques. The fiber mixture consisted of:
60% polyethylene terephthalate (PET) staple fiber (0.86 dtex (0.95 den) x 3.8 cm, L-70, Hoechst Celanese Corp., Spartanburg, SC), 20% polypropylene staple fiber (2 dtex (2.2 den ) × 4.0 cm, Hercules T-196, Wilmington, DE), and 20% bicomponent PET thermal bonding (1.8 dtex (2.0 den) x 3.8 cm, T-254, Hoechst Celanese Corp.). Spartanburg, SC).

The carded nonwoven web had a fiber basis weight of 30 g / m ² and is referred to in the following examples as "Web B".

Carded fleece (fabric C)

A carded web used as the starting material in the following examples was prepared on a HERGETH RANDOM-CARD machine from Hergeth-Hollingsworth GmbH, Dülman, Germany, using conventional web forming techniques. The fiber mixture consisted of:
78% polyethylene terephthalate (PET) staple fiber (1.0 denier x 3.8 cm, T-121, Hoechst Celanese Corp., Spartanburg, SC), and 22% bicomponent PET thermal fiber (1, 8 dtex (2.0 den) x 5.1 cm, K-52, Konamatsu).

The resulting carded web had a fiber basis weight of 23 g / m ² and is referred to as "Fabric C" in the following examples.

Comparative Example A (Process Sequence PR, engraved pattern A)

Comparative Example A (CA) was prepared using the carded web, Fabric A, which was fed at a rate of about 12.2 m / min to a calendering station with two heated rolls (manufactured by Energy Solutions Inc., St. Paul, MN). patterned using the process conditions listed in Table 1 (Method Step - P). The calendering station was fitted with a smooth steel roller having a diameter of 25.4 cm × a width of 55.9 cm in the lower position and a steel roller having a diameter of 25.4 cm × a width of 55.9 cm with an engraved pattern (Pattern A) set in the upper position. The engraved pattern A (pattern 60 represented in 6 ) had a bond area of 11.5% and consisted of rectangular pits 62 with 0.914 mm (transverse direction 65 ) × 0.203 mm (machine direction 63 ) spaced 0.356 mm in the transverse direction and 1.067 mm in the machine direction.

The patterned fabric was then (Process Step-R) impregnated with a 37.5% solids acrylic vinyl acetate copolymer latex (Product No. 78-6283, National Starch, Bridgewater, NJ, 45% solids dissolved with tap water) containing 1% antifoaming agent (Anti-foam B Silicone Emulsion, Dow Corning, Midland, MI) by passing through a gravure coating station at a speed of about 12.1 m / min. and a nip pressure of about 0.41 N / mm ² resin bound. The gravure coater was coated with a 20.3 cm x 61 cm diameter threaded rubber roller in the up position and a 16 gauge / 16 gauge (16 g / cm) diameter steel roller with a diameter of .ANG 20.3 cm × a width of 61 cm set in the lower position. The resulting nonwoven sheet was made by passing it through a 188 ° C oven at a rate of about 12.3 m / min. dried and collected on a cardboard core of 7.62 cm.

Comparative Example B (process sequence PRS, engraved pattern A)

The carded web, Fabric A, was pattern embossed and resin bonded as in Comparative Example A using the pattern embossing conditions listed in Table 1. The dried nonwoven sheet material was then smooth-roll calendered using the process conditions listed in Table 1 (Method Step-S). The smooth roll calendering process was carried out similarly to the pattern embossing described in Comparative Example A, except that the calendering station was provided with a smooth, with ei A cotton cloth covered steel roller, instead of the engraved roller in the upper position, was set. The resulting nonwoven sheet material was collected on a cardboard core of 7.62 cm.

Comparative Example 1 and 2 (process sequence PSR, engraved pattern A)

The Carded web, fabric A, was as in Comparative Example A below Use of the process conditions listed in Table 1 pattern embossed and subsequently as described in Comparative Example B using the in Smooth-roll calendering process conditions listed in Table 1 below. The resulting nonwoven sheet material was then resin bound, in one Oven dried and on a cardboard core of 7.62 cm, as in the comparative example A described, collected.

One Another nonwoven sheet material was produced in the same manner and referred to as Comparative Example 2.

Comparative Example 3 (Process Sequence SPR, engraved pattern A)

The Carded nonwoven, fabric A, was as in Comparative Example B under Use of the process conditions listed in Table 1 smooth roll calendered and then as in the comparative example A described using the process conditions listed in Table 1 pattern embossed. The resulting nonwoven sheet material was then resin bound, in one Oven dried and on a cardboard core of 7.62 cm as in the comparative example B described collected.

Comparative Example 4 (Process Sequence SPR, engraved pattern A)

The Carded nonwoven, fabric A, was as in Comparative Example B under Use of the process conditions listed in Table 1 smooth roll calendered and then as in the comparative example A described resin bound and dried in an oven. The obtained Nonwoven sheet material was then described as in Comparative Example A. pattern embossed and recorded using the process conditions listed in Table 1 collected a cardboard core of 7.62 cm.

Comparative Example C (process sequence PR, engraved pattern A)

The Comparative Example C (C.C) was made using the carded Nonwoven, fabric A, prepared as in Comparative Example A described using the pattern embossing conditions listed in Table 1 pattern embossed and resin bound. The resulting nonwoven sheet material was collected on a cardboard core of 7.62 cm.

Comparative Example D (Process Sequence PR, engraved pattern B)

Comparative Example D (CD) was prepared using the carded web, Fabric C, patterned and resin bonded as described in Comparative Example A using the pattern embossing conditions listed in Table 1 except that the engraved pattern B (Sample 70 represented in 7 ) was used instead of the engraved pattern A. The engraved pattern B had a bond area of 29.4 and consisted of a series of raised continuous line elements 72 and 72 ' which are at right angles to each other in the transverse direction 75 or machine direction 73 walked. This so-called "box pattern" is described in U.S. Patent No. 5,496,603 (Riedel et al.) The resulting nonwoven sheet material was collected on a 7.62 cm cardboard core.

Comparative Example E (Process Sequence PRS, engraved pattern A)

The Carded nonwoven, fabric A, was as in Comparative Example B under Use of the process conditions listed in Table 1 pattern embossed, resin bound and smooth-roll calendered, except that the cotton cloth covering the steel roller is made of a rubber produced material was replaced. The obtained nonwoven sheet material was dried in an oven and on a cardboard core of 7.62 cm collected.

Comparative Example 5 (Process Sequence PSR, engraved pattern A)

The carded web, Fabric A, was calendered, roll bonded, and resin bonded as in Comparative Example 2 using the process conditions listed in Table 1, except that The cotton cloth covering the steel roll was replaced with a material made of rubber. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Comparative Example 6 (Process Sequence SPR, engraved pattern A)

The Carded nonwoven, fabric A, was as in Comparative Example 3 below Use of the process conditions listed in Table 1 smooth-rolled calendered, embossed and resin-bound, except that the The cotton cloth covering the steel roller by a rubber made of rubber Material was replaced. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Comparative Example 7 (Process Sequence SRP, engraved pattern A)

The Carded nonwoven, fabric A, was as in Comparative Example 4 below Use of the process conditions listed in Table 1 smooth-rolled calendered, embossed and resin-bound, except that the The cotton cloth covering the steel roller by a rubber made of rubber Material was replaced. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Comparative Example 8 (Process Sequence SPR, engraved pattern C)

The carded web, Fabric A, was smooth-roll calendered, pattern embossed, and resin-bonded as in Comparative Example 3 using the process conditions listed in Table 1 except that the engraved pattern C (shown in FIG 2 described above) instead of the engraved pattern A, and that the cotton cloth covering the steel roller was replaced with a material made of rubber. The engraved pattern C had a bond area of 18.6% and consisted of rectangular pits aligned in both the cross machine direction and the machine direction. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Example 9 (Process Sequence SPR, engraved pattern D)

The carded web, Fabric A, was smooth-roll calendered, pattern embossed and resin bonded using the process conditions listed in Table 1, as in Comparative Example 3, except that the engraved pattern D (shown in FIG 3 described above) instead of the engraved pattern A, and that the cotton cloth covering the steel roller was replaced with a material made of rubber. The engraved pattern D had a bond area of 20.5% and consisted of plus-shaped pits aligned in cross-machine and machine direction columns. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Comparative Example 10 (Procedural sequence SPR, engraved pattern E)

The carded web, Fabric A, was smooth-roll calendered, pattern embossed, and resin bonded as in Comparative Example 3 using the process conditions listed in Table 1 except that the engraved pattern E (shown in FIG 1 described above) instead of the engraved pattern A. The engraved pattern E had a bond area of 15.4% and consisted of elongated cross-shaped depressions aligned in transverse rows and machine direction columns. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Example 11 (Process Sequence SPR, engraved pattern F)

The carded web, Fabric A, was smooth-roll calendered, pattern embossed, and resin-bonded as in Comparative Example 3 using the process conditions listed in Table 1 except that the engraved pattern F (shown in FIG 4 described above) instead of the engraved pattern A, and that the cotton cloth covering the steel roller was replaced with a material made of rubber. The engraved pattern F had a bond area of 16.0% and consisted of alternating rectangular and plus-shaped pits arranged in rows in the transverse direction and columns in Machine direction were aligned. The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Example 12 (Process Sequence SRP, engraved pattern F)

The carded web, Fabric A, was smooth-roll calendered, resin-bonded and pattern-embossed as in Comparative Example 4 using the process conditions listed in Table 1 except that the engraved pattern F (as described in Example 12 and in FIG 4 shown) was used instead of the engraved pattern A, and that the cotton cloth covering the steel roll was replaced by a material made of rubber. Also, the acrylic vinyl acetate copolymer latex binder (Product No. 78-6283) was replaced with an acrylic styrene copolymer latex binder (Product No. E-3636, Rohm & Haas, Philadelphia, PA; 50% solids dissolved with water). The resulting nonwoven sheet material was dried in an oven and collected on a cardboard core of 7.62 cm.

Adhesive tapes of the comparative examples F and G and Comparative Examples 13-16

The nonwoven sheet materials described in Comparative Examples A and B and Comparative Examples 1-4 were converted into adhesive tapes of Comparative Examples F and G and Comparative Examples 13-16, respectively. The nonwoven sheet materials were on the smooth side with 28 g / m ^{2 of} an emulsion adhesive stoffs (PSA), consisting of polymeric isooctyl acrylate / vinyl acetate / acrylic acid / D-125 polystyrene resin (Hercules Chemicals) (89/6/3/2) coated, the preparation of which is generally described in EP Patent No. 554 832 B. The embossed side of the webs was coated with 2 g / m ^{2 of} a low adhesion urethane backing (LAB) composed of the reaction product of polyvinyl alcohol and octadecyl isocyanate (as described in U.S. Patent No. 3,121,021).

REVIEWS

Comparative Examples 1-4 and Comparative Examples A and B

The nonwoven sheet materials described in Comparative Examples A and B and Comparative Examples 1-4 were cut into appropriate sample sizes and evaluated for breakage at break (machine direction and transverse direction) and hand. The results are shown in Table 2. All nonwoven sheet materials of these examples have been observed to be rupturable by hand and provide a clean, straight tear in the fabric cross direction and fabric down direction with minimal fraying.

Comparative Examples 5-8, 10, Examples 9, 11, 12 and Comparative Examples C, D and E.

The in Comparative Examples C, D and E in Examples 9, 11, 12 and the Comparative Examples 5-8, 10 described nonwoven sheet materials were cut into suitable sample sizes and evaluated for tear strength at break (machine direction and transverse direction) and tear (machine direction and transverse direction). The results are shown in Table 3.

Comparative Examples 13-16 and Comparative Examples F and G

The nonwoven sheet materials described in Comparative Examples F and G and Comparative Examples 13-16 were cut into appropriate sample sizes and evaluated for sticking. The results are shown in Table 4. All nonwoven sheet materials of these examples have been observed to be tearable by hand and provide a clean, straight tear in the transverse direction with minimal fraying.

Conclusions

Out the test results provided in Tables 2, 3 and 4 can be concluded that the hand-rupted nonwoven web materials and tapes of the present invention (all made with the process steps the resin bond, pattern embossing and smooth-roll calendering) improved tear strength and / or sticking properties, compared with corresponding, without a step of the Smooth-roll calendering or with a PRS process sequence (Comparative Examples A-G) manufactured materials, exhibit. For example, as shown in Table 2, the materials made from SRP and PSR process sequences the highest Tensile strengths. From Table 4 it is observed that the sheet materials under Adhesive tapes made using the SRP, SPR and PSR process sequences are all superior Own adhesive properties.

Out The test results provided in Table 3 can be inferred be that the engraved pattern can be designed such that the raspable by hand Nonwoven sheet materials and adhesive tapes of the present invention very straight in the cross direction, machine direction or both. moreover For example, the sequence of binding steps can be varied to improve Tear resistance properties, compared with corresponding materials without the process step smooth-roller calendering (Comparative Examples C and D). For example, owned comparing the nonwoven web materials with an engraved pattern A (Table 3) the web materials prepared with the process sequence SRP the highest tear strength.

Comparative Example H (Process Sequence PR, engraved pattern G)

The carded web, Fabric A, was drawn at a speed of about 13 m / min. to a calendering station with two heated rolls (manufactured by Energy Solutions Inc., St. Paul, MN) and pattern-embossed using the process conditions listed in Table 5 (Method Step-P). The calendering station was fitted with a smooth steel roller having a diameter of 25.4 cm × a width of 55.9 cm in the lower position and a steel roller having a diameter of 25.4 cm × a width of 55.9 cm with an engraved pattern (Pattern G) set in the upper position. The engraved pattern G is similar to the pattern A (shown in FIG 6 ), except that it had a bond area of 12% and consisted of rectangular cavities of 0.8 mm (transverse direction) × 0.5 mm (machine direction) at intervals of 0.5 mm in the transverse direction and 1 mm in the machine direction. The patterned fabric was then with a 25% solids acrylic vinyl acetate copolymer latex (Product No. 78-6283, National Starch, Bridgewater, NJ; 45% solids dissolved with deionized water) containing 0.5% antifoam (Antifoam B Silicone Emulsion, Dow Corning, Midland, MI). and 0.5 surfactant (TRITON GR-5 Union Carbide Corp., Canbury, Conn.) resin-bound by passing through a gravure coating station at the conditions listed in Table 5 (Method Step-R). The gravure coater was coated with a 20.3 cm x 61 cm diameter threaded rubber roller in the up position and a 16 gauge / 16 gauge (16 g / cm) diameter steel roller with a diameter of .ANG 20.3 cm × a width of 61 cm set in the lower position. The resulting nonwoven sheet material was dried by passing through an oven at the conditions listed in Table 5 and collected on a 7.62 cm cardboard core.

Comparative Example 17 (Process sequence SPR, engraved pattern G)

The carded fleece, fabric A, was at a speed of about 13 m / min. to a calendering station with two heated rolls (manufactured from Energy Solutions Inc., St. Paul, MN) and using pattern embossed in the process conditions listed in Table 5 (Method Step - S). This step became similar the pattern embossing step described in Comparative Example H carried out, except that the calendering station with a smooth steel roller (25.4 cm Diameter × 55.9 cm width) instead of the engraved roller in the upper position has been. The resulting nonwoven sheet material was then as in the comparative example F using the pattern embossing conditions listed in Table 5 pattern embossed and resin bound. The resulting nonwoven sheet material was placed on a Cardboard core of 7.62 cm collected.

Comparative Example I (Process Sequence PR, engraved pattern A)

The carded web, fabric B, was at a speed of about 13 m / min. to a calendering station with two heated rolls (manufactured by Energy Solutions Inc., St. Paul, MN) and pattern-embossed using the process conditions listed in Table 5 (Method Step-P). The calendering station was fitted with a smooth steel roller having a diameter of 25.4 cm × a width of 55.9 cm in the lower position and a steel roller having a diameter of 25.4 cm × a width of 55.9 cm with an engraved pattern (Pattern A) set in the upper position. The engraved pattern A (as in 6 1) had a bond area of 11.5% and consisted of rectangular 0.91 mm (transverse) × 0.203 mm (machine direction) grooves spaced 0.35 mm in the transverse direction and 1.067 mm in the machine direction. The embossed fabric was then resin bonded, similar to Comparative Example H, at the conditions listed in Table 5. The gravure coater was coated with a 20.3 cm x 61 cm diameter threaded rubber roller in the up position and a 16 gauge / 16 gauge (16 g / cm) diameter steel roller with a diameter of .ANG 20.3 cm × a width of 61 cm set in the lower position. The resulting nonwoven sheet material was dried by passing through an oven at the conditions listed in Table 5 and collected on a 7.62 cm cardboard core.

Comparative Example 18 (Process sequence SPR, engraved pattern A)

The carded nonwoven, fabric A, was as in Comparative Example 17 under Use of the roll-roll calendered conditions listed in Table 5. This tissue was subsequently as described in Comparative Example I using the in Table 5 listed process conditions pattern embossed. The obtained nonwoven sheet material was on a cardboard core of 7.62 cm collected.

Comparative Example 19 (Process sequence SPR, engraved pattern A)

The carded web, Fabric B, was calendered as in Comparative Example 17 using the conditions listed in Table 5. This fabric was then pattern embossed as described in Comparative Example I using the conditions listed in Table 5. The calendered patterned web was then subsequently treated with a 25% solids acrylic polymer solution (E-3522, Rohm and Haas Company, Philadelphia, PA; 52% solids dissolved with deionized water) containing 0.5% antifoam (Antifoam B Silicone Emulsion, Dow Corning , Midland, MI) and 0.5% surfactant (TRITON GR-5 Union Carbide Corp., Canbury, Conn.) Resin-bound by passing through a gravure coating station at the conditions listed in Table 5 (Method Step-R). The gravure coater was provided with a 20.3 cm x 61 cm diameter threaded rubber roller in the upper position and a three-bar pattern steel roller 16 lines / cm (Northern Engraving, Green Bay, WI) with a diameter of 20.3 cm × a width of 61 cm set in the lower position. The resulting nonwoven sheet material was collected on a cardboard core of 7.62 cm.

Comparative Example 20 (Process sequence SRP, engraved pattern A)

The carded web, Fabric B, was calendered smooth as in Comparative Example 17, resin bonded as in Comparative Example 19, and then pattern embossed using the conditions listed in Table 5, as in Comparative Example I. The resulting nonwoven sheet material was collected on a cardboard core of 7.62 cm.

Comparative Examples J and K and Comparative Examples 21-24

The multilayer laminates of Comparative Examples J and K and Comparative Examples 21-24 were prepared from the nonwoven sheet materials of Comparative Examples H and I and Comparative Examples 17-20. to provide Comparative Examples J and K and Comparative Examples 21-24, respectively. Each multilayer laminate was made by sandwiching a polypropylene film between two nonwoven webs, resulting in a nonwoven layer / tape layer / nonwoven layer configuration. The three layer sample was then placed between the plates (15.2 cm x 15.2 cm) of a preheated Carver press (Machine No. 2824-1, Fred S. Carver, Inc., Menomonee Falls, WI) at 0, 6 MPa for 30 seconds at 182 ° C placed. The polypropylene film (blown XBP-486.0 0.4 mm, obtained from Consolidated Film, Chippewa Falls, WI) served as a primer to bond the two nonwoven layers.

REVIEWS

The in Comparative Examples J and K and Comparative Examples 21-24 described multilayer laminates were cut into suitable sample sizes and tear resistance at break (machine direction and transverse direction) and crack propagation rated.

The tear strength was modeled using an Instron tensile testing machine 1122 (Instron Corp., Canton, Massachusetts), equipped with a 45N load cell, model 2511-105 (full scale range construction A40-41A) measured. A crosshead speed of 12.7 cm / min. and a Gap of 5 cm were for all tests used. The 12.7 cm × 1.27 cm samples were for a period of at least four hours at a constant temperature (20 ° C) and Moisture condition (50%) before testing in the treatment environment conditioned.

The tear Test in both the MD and CD directions was determined using a Elmendorf tester (Thwing Albert Instrument Co, Model 60-200) according to ASTM D1922. On 6,35 cm × 6,35 cm cut samples were conditioned as described for tensile strength measurement, into the jaws of the tester placed and clamped. An initial one Slot was made before the pendulum was released. Of the Test measured the required force to propagate a straight crack with the Circulation that the crack is not more than 6.4 mm from the initial Cut deviates.

The results are shown in Table 6. It was observed that all samples were rupturable by hand and provided a fairly clean, straight tear in the transverse direction with minimal fraying. All samples were suitable as carriers for masking tapes; the samples had sufficient tear strength that they can be drawn without delamination or tearing, by dry paint, and were sufficiently non-porous to prevent paint solvent from penetrating through the backing to the adhesive.

Conclusions

The test results provided in Table 6 show that the hand-tearable More Layered laminates of the present invention (all made with the process steps of resin bonding, pattern embossing and smooth-roll calendering) improved tear strength compared with corresponding laminates produced without a process step of the smooth-roller calendering (Comparative Examples J and K) had. Example 21, for example, showed an increase of 20% over Comparative Example J in MD tears, while good hand tearability in the CD direction was preserved.

It should be clear from these examples that a broad range at desired physical properties by tailoring the carded Nonwoven fiber, binder, adhesive chemistry and coating weight and process conditions (web formation, calendering temperatures, Calendering roll materials and patterns, etc.) could be achieved a particular end-use item.

Claims (28)

Pressure-sensitive adhesive article comprising a non-woven carrier with a first surface and a second surface; and one on the first surface of the carrier coated pressure-sensitive adhesive, wherein the carrier has an embossed pattern on a nonwoven fabric having the embossing pattern selected is from the group consisting of at least two rows of several Depressions in a first direction that are oriented in such a way that columns from the multiple wells in a second direction be formed, with a distance between two recesses in opposite to a column a distance between two wells in a second column varies and at least two rows of multiple wells in a first direction are arranged such that columns of the several recesses are formed in a second direction, wherein a distance between two recesses in at least one Column along the first direction varies, and wherein the plurality Depressions in each row, further a series of alternating "+" and "-" signs or a series include "+" characters. Nonwoven web article comprising an embossed pattern selected on a non-woven fabric from the group consisting of at least two rows of several Depressions in a first direction that are oriented in such a way that columns of the plurality of wells in a second direction be formed, with a distance between two recesses in opposite to a column a distance between two wells in a second column varies and at least two rows of multiple wells in a first direction are arranged such that columns of the several recesses are formed in a second direction, wherein a distance between two recesses in at least one Column along the first direction varies, and wherein the plurality Depressions in each row, further a series of alternating "+" and "-" signs or one Include a series of "+" characters. An article according to claim 1 or 2, wherein the nonwoven fabric unbreakable staple fibers, binder fibers and a binder. An article according to claim 1 or 2, wherein the plurality Depressions up to 28% of the total surface area of the carrier. The article of claim 1 further comprising the second surface of the carrier applied low-adhesion backsize composition. The article of claim 1 further comprising a release liner on the first surface applied to the wearer Pressure sensitive adhesive. Article according to claim 1 or 2, wherein the distance between two consecutive wells in a first one Direction 0.51 mm to 0.36 mm and the distance between two consecutive Wells in a second direction is 0.51 mm to 0.36 mm. An article according to claim 1 or 2, wherein each of the first Direction and the second direction to each other substantially perpendicular are. Article according to claim 1, wherein the pressure-sensitive adhesive selected is selected from the group consisting of a rubber-based adhesive, a water-based adhesive, a solvent-based adhesive, a hot-melt adhesive and a combination of them. An article according to claim 1 or 2, wherein each of the plurality Wells a "+" sign is and the multiple wells 15% to 22% of the total surface of the carrier turn off. An article according to claim 1 or 2, wherein the plurality Wells a combination of a "+" sign and a "-" sign are and the multiple wells make up 15% to 20% of the total surface area of the carrier. An article according to claim 1 or 2, wherein the plurality Wells such a combination of a "+" sign and a "-" sign are that the multiple wells 15% to 20% of the total surface of the carrier turn off. The article of claim 1, wherein the carrier further comprises a second web. Method for producing a nonwoven sheet material full: Forms of a statistically entangled fiber fleece stretched unbreakable staple fibers and binder fibers; Pattern embossing of Non-woven fabric with a pattern selected from the group consisting from at least two rows of multiple wells in a first Direction aligned such that columns of the multiple Wells are formed in a second direction, with a Distance between two wells in a column opposite to one Distance between two wells in a second column varies and at least two rows of multiple wells in a first Direction are aligned such that columns of the plurality of wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies; Smooth-roll calendering of the non-woven fabric after patterning; and Provide even connections everywhere in the world Nonwoven fabric using a chemical binder after the Smooth roll calendering. Method for producing a nonwoven sheet material full: Forms of a statistically entangled fiber fleece stretched unbreakable staple fibers and binder fibers; first Smooth-roll calendering of the non-woven fabric; Pattern embossing of Non-woven fabric with a pattern selected from the group consisting from at least two rows of multiple wells in a first Direction aligned such that columns of the multiple Wells are formed in a second direction, with a Distance between two wells in a column opposite to one Distance between two wells in a second column varies and at least two rows of multiple wells in a first Direction are aligned such that columns of the plurality of wells be formed in a second direction, with a distance between two depressions in at least one column along the first Direction varies; and Provide even connections everywhere in the world Nonwoven fabric using a chemical binder, wherein smooth-roll calendering prior to pattern embossing or providing uniform connections carried out becomes. The method of claims 14 and 15, wherein the step providing links infusing the fibrous web comprising a water-based chemical binder. The method of claims 14 and 15 further comprising Drying with the water-based chemical binder infused nonwoven fabric until the removal of substantially the entire water. The method of claims 14 and 15 further comprising applying a pressure-sensitive adhesive layer to a first surface of the Nonwoven fabric. The method of claims 14 and 15 further comprising applying a low - adhesion backsize to a second surface of the Nonwoven fabric. The method of claim 19 further comprising Rolling up the nonwoven fabric such that the pressure sensitive adhesive on the first surface of the non-woven fabric with the low-adhesion backsize on the second Area of Nonwoven fabric is in contact. The method of claim 15, wherein providing uniform compounds before the Mus is carried out. The method of claim 15, wherein patterning is before providing even connections carried out becomes. Process for the preparation of a pressure-sensitive adhesive article full: Forming a first randomly entangled nonwoven fabric; smooth roll calendering the fiber web; pattern embossing the nonwoven fabric for forming an embossed pattern according to claim 1 or 2; Provide even connections everywhere in the world Non-woven fabric using a chemical binder; and coating a first surface of the nonwoven fabric with a pressure sensitive adhesive, wherein the pressure sensitive adhesive article has an adhesive rating of less than 76 mm. The method of claim 23, further comprising Laminating a second fibrous web onto the first fibrous web. The method of claim 23, further comprising Apply a little adhesive backsize to a second surface of the Nonwoven fabric. The method of claim 23, wherein patterning of the Nonwoven fabric before smoothing calendering of nonwoven fabric and Providing uniform connections takes place in the nonwoven fabric. The method of claim 23, wherein the smooth-roll calendering the nonwoven fabric before the pattern embossing of the nonwoven fabric and the Providing uniform connections takes place in the nonwoven fabric. The method of claim 26, wherein providing uniform compounds in the nonwoven fabric 10 takes place before the pattern embossing of the nonwoven fabric.