阅读说明：本技术 胶粘剂组合物和制品 (Adhesive composition and article ) 是由 卢盈裕 米切尔·A·F·约翰逊 格雷格·A·帕特诺德 肖恩·M·韦斯特 杰弗里·O·埃姆斯兰 于 2019-08-07 设计创作，主要内容包括：本公开整体涉及胶粘剂组合物、包含胶粘剂组合物的制品以及制备此类组合物和制品的方法。在一些实施方案中,该胶粘剂组合物包含橡胶、热塑性弹性体、填料以及UV稳定剂或热稳定剂。在一些实施方案中,该胶粘剂制品包含与背衬相邻的本文所述的胶粘剂组合物。在一些实施方案中,该胶粘剂制品还包括接合层和密封层中的至少一种。本公开的一些实施方案还涉及包括本公开的胶粘剂制品的包装材料。此类包装材料还可包括例如缓冲层和外层。在其他实施方案中,本公开涉及包括本文所述的胶粘剂组合物和膜的紧固系统。(The present disclosure relates generally to adhesive compositions, articles comprising adhesive compositions, and methods of making such compositions and articles. In some embodiments, the adhesive composition comprises a rubber, a thermoplastic elastomer, a filler, and a UV or heat stabilizer. In some embodiments, the adhesive article comprises an adhesive composition described herein adjacent to a backing. In some embodiments, the adhesive article further comprises at least one of a tie layer and a sealing layer. Some embodiments of the present disclosure also relate to packaging materials comprising the adhesive articles of the present disclosure. Such packaging materials may also include, for example, a cushioning layer and an outer layer. In other embodiments, the present disclosure relates to fastening systems comprising the adhesive compositions and films described herein.)

1. An adhesive composition, the adhesive composition comprising:

about 30% to about 70% by weight of a rubber;

about 10 wt% to about 50 wt% of a thermoplastic elastomer; and

about 10 wt% to about 45 wt% of a filler;

wherein the weight% is based on the total weight of rubber + thermoplastic elastomer + filler.

2. The adhesive composition of claim 1, wherein the adhesive composition is extrudable and/or capable of being blown into a film.

3. The adhesive composition of any of the preceding claims, comprising:

about 35% to about 65% by weight of a rubber.

4. The adhesive composition of any of the preceding claims, wherein the rubber comprises at least one of natural rubber, synthetic rubber, and mixtures thereof.

5. The adhesive composition of claim 4, wherein the synthetic rubber is at least one of polyisoprene rubber, polybutadiene rubber, styrene-butadiene rubber (SBR), polychloroprene rubber, nitrile rubber, and mixtures thereof.

6. The adhesive composition of claim 5 wherein the synthetic rubber is 1,4 cis polyisoprene.

7. The adhesive composition of any of the preceding claims, comprising:

about 15 wt% to about 45 wt% of a thermoplastic elastomer.

8. The adhesive composition of any of the preceding claims wherein the thermoplastic elastomer comprises at least one of styrene-isoprene-styrene, styrene-isoprene/butadiene-styrene, styrene-ethylene/butylene-styrene, styrene-ethylene/propylene-styrene, and mixtures thereof.

9. The adhesive composition of any one of the preceding claims, wherein the thermoplastic elastomer has a total content of total styrene units of between about 10 wt.% and about 50 wt.%, based on the total weight of the thermoplastic elastomer.

10. The adhesive composition of any of the preceding claims wherein the thermoplastic elastomer comprises at least one of styrene-isoprene, styrene butadiene isoprene, styrene isoprene butadiene, styrene-ethylene/butadiene, styrene-ethylene-propylene, and mixtures thereof.

11. The adhesive composition of claim 10 wherein the weight percent of diblock copolymer in the thermoplastic elastomer is less than 40 weight percent, based on the total weight of the thermoplastic elastomer.

12. The adhesive composition of any of the preceding claims wherein the thermoplastic elastomer is non-tacky at an ambient temperature of about 25 ℃ and has a viscosity of greater than 3 x 10 at 25 ℃ when measured by a dynamic mechanical rheometer at a frequency of about 1Hz⁵Pa, storage modulus.

13. The adhesive composition of any of the preceding claims, wherein the filler comprises at least one of expanded perlite, microspheres, expandable microspheres, ceramic spheres, zeolites, clay fillers, glass beads, silica-type fillers, fumed silica, fibers, nanoparticles, talc, calcium carbonate, aluminum silicate, titanium dioxide and silica, diatomaceous earth, waxes, and any combination thereof.

14. The adhesive composition of any of the preceding claims, wherein the adhesive composition comprises a tackifier and/or plasticizer content of less than 20 wt.%, based on the total weight of rubber and thermoplastic elastomer in the adhesive composition.

15. The adhesive composition of any of the preceding claims, further comprising:

from about 0.1 parts to about 10 parts of a UV stabilizer and/or a heat stabilizer per 100 parts total rubber and thermoplastic elastomer.

16. The adhesive composition of claim 15, wherein the UV and/or thermal stabilizer comprises at least one of amines, phenols, dithiocarbamates, Tinuvian stabilizers, and UV absorbers.

17. An adhesive article, the adhesive article comprising:

an adhesive portion comprising the adhesive composition of any one of claims 1 to 16; and

a backing portion adjacent to the adhesive portion.

18. The adhesive article of claim 17 further comprising:

a bonding layer between the adhesive portion and the backing portion.

19. The adhesive article of any one of claims 17 or 18, further comprising:

and (7) sealing the layer.

20. The adhesive article of any one of claims 17-19 wherein the backing portion comprises at least one of plastic, nonwoven, paper, metal foil, foam, and mixtures thereof.

21. The adhesive article of claim 19 wherein the plastic comprises at least one of polypropylene, uniaxially or biaxially oriented polypropylene, vinyl, polyolefin, polyethylene, polyurethane, urethane acrylate, polyester, polyethylene terephthalate, and mixtures thereof.

22. The adhesive composition of any one of claims 19-21 wherein the sealing layer comprises a thermoplastic elastomer.

23. The adhesive article of claim 22 wherein the thermoplastic elastomer comprises at least one of a triblock copolymer and a diblock copolymer and mixtures thereof, the triblock copolymer is composed of styrene-isoprene-styrene (SIS), styrene-isoprene/butadiene-styrene (SIBS), styrene-butadiene-styrene (SBS), styrene-ethylene/butylene-styrene (SEBS), and styrene-ethylene/propylene-styrene (SEPS), the diblock copolymer is composed of styrene-isoprene, styrene butadiene isoprene, styrene isoprene butadiene, styrene-ethylene/butadiene, and styrene-ethylene-propylene.

24. The adhesive article of any one of claims 19-23 wherein the sealing layer comprises at least one of polyethylene, polyolefin copolymer, thermoplastic elastomer, and mixtures thereof.

25. The adhesive article of any one of claims 17-24 wherein the layers are coextruded.

26. The adhesive article of any one of claims 17-25 wherein at least some of the layers are multiple layers.

27. The adhesive article of any one of claims 17-26 wherein the adhesion to an adherent surface is less than 200 grams per inch when measured according to PSTC-101 method a.

28. The adhesive article of any one of claims 17-26 wherein the T-peel is greater than 400 grams per inch when measured according to ASTM D1876.

29. A multilayer packaging material, comprising:

the adhesive article of any one of claims 17-28;

a buffer layer; and

and (4) an outer layer.

30. The multilayer packaging material of claim 29, wherein the cushion layer comprises at least one of a bubble wrap or a foam.

31. A multilayer packaging material according to any one of claims 29 to 30, wherein the outer layer is at least one of paper, plastic and/or nonwoven material.

32. A multilayer packaging material according to any one of claims 29 to 31, wherein the outer layer is at least one of a single layer, a double layer or a triple layer.

33. A multilayer packaging material according to any one of claims 29 to 32, wherein the packaging material passes the shipping test as described herein.

34. A method of making an adhesive article, the method comprising:

obtaining the adhesive composition of any one of claims 1 to 15; and

the adhesive composition is placed adjacent to a backing.

35. The method of claim 34, wherein placing the adhesive composition adjacent to the backing comprises extruding or co-extruding the adhesive composition and the backing.

36. The method of any one of claim 34 or claim 35, further comprising:

a tie layer or portion is placed between the adhesive composition and the backing.

37. The method of claim 36, wherein placing the tie layer or portion between the adhesive composition and the backing comprises co-extruding the tie layer with the adhesive composition and the backing.

38. The method of any one of claims 35 to 37, further comprising:

a sealing layer is placed adjacent to the backing.

39. The method of claim 38, wherein placing the sealing layer adjacent to the backing comprises co-extruding the sealing layer with the adhesive composition and the backing.

40. A fastening system, the fastening system comprising:

a first fastening element comprising a first adhesive film; and

a second fastening element comprising a second adhesive film;

wherein the first adhesive film and the second adhesive film comprise the adhesive composition of any one of claims 1 to 16.

41. The fastening system of claim 20, wherein at least one of the first fastening element or the second fastening element further comprises a substrate.

42. The fastening system of claim 40, wherein the first adhesive film and the second adhesive film are compositionally identical.

43. An absorbent article, comprising:

an absorbent layer comprising a back sheet, a top sheet, and an absorbent core disposed between the back sheet and the top sheet; and

a fastening system according to any one of claims 40 to 42.

44. The absorbent article set forth in claim 43 wherein the first fastening element is disposed on the backsheet and the second fastening element is disposed on the topsheet.

Technical Field

The present disclosure relates generally to adhesive compositions, articles comprising adhesive compositions, and methods of making such compositions and articles.

Background

Adhesive coatings (also known as cold seal adhesives) are a class of pressure sensitive adhesives that are capable of forming a strong bond with themselves, but not with substantially other surfaces, when pressure is applied. In some embodiments, the adhesive coating is thus pressure-responsive, i.e., the introduction of mechanical energy is all that is required to initiate seal formation. Because of these advantageous shapes, adhesive coatings are used in many different types of applications.

Disclosure of Invention

The inventors of the present disclosure have recognized that adhesive coatings are made by solvent coating, which is an expensive and/or environmentally unfriendly manufacturing process. The inventors of the present disclosure sought to prepare an extrudable adhesive composition. To this end, the inventors of the present disclosure have discovered a novel adhesive formulation that is extrudable.

The inventors of the present disclosure have also recognized that laminating or coating an adhesive coating onto a film or article is difficult and expensive because the adhesive coating does not adhere to materials other than itself. The inventors of the present disclosure also recognized that an adhesive coated material could be formed if an extrudable adhesive could be coextruded with another extrudable material (such as a backing or core) without the need for difficult or expensive procedures, such as surface modification of the coated material, to laminate the adhesive coating to another backing or core.

In some embodiments, the adhesive composition may be coated or applied to at least a portion of the backing or core. In other embodiments, the adhesive composition may be used in packaging materials. In other embodiments, the adhesive composition may be used in a fastening system for an absorbent article.

Some embodiments relate to an adhesive composition comprising: about 30% to about 70% by weight of a rubber; about 10 wt% to about 50 wt% of a thermoplastic elastomer; and about 10 wt% to about 45 wt% filler; wherein the weight% is based on the total weight of rubber + thermoplastic elastomer + filler.

In some embodiments, the adhesive composition is extrudable and/or capable of being extrudedCan be blown into a film. In some embodiments, the adhesive composition comprises between about 35% and about 65% by weight rubber. In some embodiments, the rubber comprises at least one of natural rubber, synthetic rubber, and mixtures thereof. In some embodiments, the synthetic rubber is at least one of polyisoprene rubber, polybutadiene rubber, styrene-butadiene rubber (SBR), polychloroprene rubber, nitrile rubber, and mixtures thereof. In some embodiments, the synthetic rubber is 1,4 cis polyisoprene. In some embodiments, the adhesive composition comprises from about 15 wt.% to about 45 wt.% of the thermoplastic elastomer. In some embodiments, the thermoplastic elastomer comprises at least one of styrene-isoprene-styrene, styrene-isoprene/butadiene-styrene, styrene-ethylene/butylene-styrene, styrene-ethylene/propylene-styrene, and mixtures thereof. In some embodiments, the thermoplastic elastomer has a total content of all styrene units of between about 10 wt.% and about 50 wt.%, based on the total weight of the thermoplastic elastomer. In some embodiments, the thermoplastic elastomer comprises at least one of styrene-isoprene, styrene butadiene isoprene, styrene isoprene butadiene, styrene-ethylene/butadiene, styrene-ethylene-propylene, and mixtures thereof. In some embodiments, the weight percentage of diblock copolymer in the thermoplastic elastomer is less than 40 weight percent, based on the total weight of the thermoplastic elastomer. In some embodiments, the thermoplastic elastomer is non-tacky at an ambient temperature of about 25 ℃ and has a viscosity of greater than 3 x 10 at 25 ℃ when measured by a dynamic mechanical rheometer at a frequency of about 1Hz⁵Pa, storage modulus. In some embodiments, the filler comprises at least one of expanded perlite, microspheres, expandable microspheres, ceramic spheres, zeolites, clay fillers, glass beads, silica-type fillers, fumed silica, fibers, nanoparticles, talc, calcium carbonate, aluminum silicate, titanium dioxide and silica, diatomaceous earth, waxes such as polyethylene wax, and any combination thereof. In some embodimentsThe adhesive composition comprises a tackifier and/or plasticizer content of less than 20 wt.%, based on the total weight of rubber and thermoplastic elastomer in the adhesive composition. Some embodiments further comprise from about 0.1 parts to about 10 parts of a UV stabilizer and/or a heat stabilizer per 100 parts total rubber and thermoplastic elastomer. In some embodiments, the UV stabilizer and/or thermal stabilizer comprises at least one of amines, phenols, dithiocarbamates, Tinuvian stabilizer, and UV absorbers.

Some embodiments relate to an adhesive article comprising: an adhesive portion comprising an adhesive composition as described herein; and a backing portion adjacent to the adhesive portion.

Some embodiments further include a tie layer between the adhesive portion and the backing portion. Some embodiments further comprise a sealing layer. In some embodiments, the backing portion comprises at least one of plastic, nonwoven, paper, metal foil, foam, and mixtures thereof. In some embodiments, the plastic comprises at least one of polypropylene, uniaxially or biaxially oriented polypropylene, vinyl, polyolefin, polyethylene, polyurethane, urethane acrylate, polyester, polyethylene terephthalate, and mixtures thereof. In some embodiments, the tie layer comprises a thermoplastic elastomer. In some embodiments, the thermoplastic elastomer comprises at least one of a triblock copolymer consisting of styrene-isoprene-styrene (SIS), styrene-isoprene/butadiene-styrene (SIBS), styrene-butadiene-styrene (SBS), styrene-ethylene/butylene-styrene (SEBS), and styrene-ethylene/propylene-styrene (SEPS), and a diblock copolymer consisting of styrene-isoprene, styrene butadiene isoprene, styrene isoprene butadiene, styrene ethylene/butadiene, and styrene ethylene propylene, and mixtures thereof. In some embodiments, the sealing layer comprises at least one of polyethylene, polyolefin copolymer, thermoplastic elastomer, and mixtures thereof. In some embodiments, the layers are coextruded. In some embodiments, at least some of the layers are multiple layers. In some embodiments, the adhesion to the adherent surface is less than 200 grams/inch when measured according to PSTC-101, method a. In some embodiments, the T-peel is greater than 400 grams/inch when measured according to ASTM D1876.

Some embodiments relate to a multilayer packaging material comprising: an adhesive article consistent with the teachings herein; a buffer layer; and an outer layer.

In some embodiments, the cushioning layer comprises at least one bubble wrap or foam. In some embodiments, the outer layer is at least one of paper, plastic, and/or a nonwoven material. In some embodiments, the outer layer is at least one of a monolayer, a bilayer, or a trilayer. In some embodiments, the packaging material passes the shipping test/pop open as described herein.

Some embodiments relate to a fastening system for an absorbent article comprising an adhesive film according to the present disclosure. In some embodiments, a fastening system includes a first fastening element having a substrate and a first adhesive film and a second fastening element having a substrate and a second adhesive film. The first adhesive film and the second adhesive film are self-mating, i.e., co-adhering and releasably engaging, when the article to which the fastening system is adhered is closed.

Some embodiments relate to a method of making an adhesive article, the method comprising: obtaining an adhesive composition in accordance with the teachings herein; and placing the adhesive composition adjacent to the backing. In some embodiments, placing the adhesive composition adjacent to the backing comprises extruding or co-extruding the adhesive composition and the backing. Some embodiments also relate to placing a tie layer or portion between the adhesive composition and the backing. In some embodiments, placing the tie layer or portion between the adhesive composition and the backing comprises co-extruding the tie layer with the adhesive composition and the backing. Some embodiments also involve placing the sealing layer adjacent to the backing. In some embodiments, placing the sealant layer adjacent to the backing comprises co-extruding the sealant layer with the adhesive composition and the backing.

Drawings

Fig. 1 is a cross-sectional side view of an exemplary adhesive article according to the teachings herein.

Fig. 2 is a cross-sectional side view of an exemplary adhesive article according to the teachings herein.

Fig. 3 is a cross-sectional side view of an exemplary adhesive article according to the teachings herein.

Fig. 4 is a cross-sectional side view of an exemplary adhesive article according to the teachings herein.

Fig. 5 is a cross-sectional schematic side view of an exemplary adhesive article included in an exemplary wrapper.

Fig. 6 is a schematic perspective view of the exemplary wrapper of fig. 5 in use.

Fig. 7 is a schematic perspective view of the exemplary packaging material of fig. 5 in a final state, wrapped around an article to be shipped after the use process shown in fig. 6.

Fig. 8 is a schematic perspective view of the exemplary wrapper of fig. 5 in use.

Fig. 9 is a schematic perspective view of the exemplary packaging material of fig. 5 in a final state, wrapped around an article to be shipped after the use process shown in fig. 8.

FIG. 10 is an isometric view of an exemplary absorbent article including a fastening system according to the present application.

Fig. 11 is an isometric view of the absorbent article of fig. 10 in a closed configuration.

Detailed Description

The present disclosure relates generally to adhesive compositions, articles comprising adhesive compositions, and methods of making such compositions and articles. As used herein, the term "adhesive" means an adhesive that adheres to itself and does not substantially adhere to other materials. In some embodiments, the adhesive composition is non-tacky to the touch at ambient temperatures. In some embodiments, the adhesive composition and/or article has a tack of less than 30 grams when measured by a TA-XT2i texture analyzer in accordance with ASTM D-2979. In some embodiments, the tack (when measured as described above) is less than 20 grams or less than 10 grams.

In some embodiments, the adhesive composition has less than about 20 wt% tackifier, plasticizer, and/or mixtures thereof, based on the total weight of the adhesive composition. In some embodiments, the adhesive composition has less than about 15 wt.%, or less than about 10 wt.%, or less than about 5 wt.% tackifier, plasticizer, and/or mixtures thereof, based on the total weight of the adhesive composition.

In some embodiments, the adhesive composition, layer, or material co-adheres to itself while being able to contact other surfaces without adhering, damaging, or leaving a residue that would otherwise damage the surface or damage the other surface. In some embodiments, the adhesive will be cleanly removed from the adjacent article (i.e., without damaging the article) while adhering strongly enough to itself and/or another adhesive surface so as to create a strong bond sufficient to remain adhered or bonded in a desired configuration or orientation during use. In some embodiments, the adhesive is capable of being cleanly removed from the article to which it is exposed, meaning that it does not damage the article and/or leave a significant residue on the article when it is removed from the article.

Adhesive composition

Some embodiments of the present disclosure relate to adhesive compositions. In some embodiments, the adhesive composition comprises a rubber, a thermoplastic elastomer, a filler, and a UV stabilizer and/or a thermal stabilizer. In some embodiments, the adhesive composition comprises between about 30 to 90 weight percent of a rubber; 10-70 wt% of a thermoplastic elastomer; and 10-100 parts of filler per 100 parts of total rubber + thermoplastic elastomer. Some embodiments further comprise 0.1 to 10 parts of a UV stabilizer and/or heat stabilizer per 100 parts total rubber + thermoplastic elastomer.

Rubber composition: rubbers that can be used in the adhesive composition of the present invention include synthetic rubbers, natural rubbers, and/or mixtures thereof. In some embodiments, synthetic rubbers are preferred over natural rubbersGums, because the incidence of latex allergy (allergy to proteins present in natural rubber latex) is increasing. Exemplary synthetic rubbers include, for example, polyisoprene rubber (including, for example, 1,4 cis-polyisoprene), polybutadiene rubber, styrene-butadiene rubber (SBR), polychloroprene rubber, nitrile rubber, and mixtures thereof. Some commercially available polyisoprene rubbers include, for example, those sold by Raynaud Corporation (Zeon Corporation)IR 2200 and 2200L, both sold by Kraton CorporationIR 307 andIR 310。

in some embodiments, the adhesive composition comprises between about 30% to 70% by weight rubber. In some embodiments, the adhesive composition comprises between about 35 wt.% to 65 wt.% rubber. In some embodiments, the adhesive composition comprises at least about 30 wt.%, or about 35 wt.%, or about 40 wt.%, or about 45 wt.%, or about 50 wt.% rubber. In some embodiments, the adhesive composition comprises less than about 70 wt.%, or about 65 wt.%, or about 60 wt.%, or about 55 wt.% rubber.

Thermoplastic elastomer：

Generally, thermoplastic elastomers (TPEs) are plastics that exhibit the properties of vulcanized elastomers (rubbers) at room temperature, but can be handled like thermoplastics when heated. The TPEs of the present disclosure are block copolymers. In some embodiments, TPEs can be melted, repeatedly deformed, and recycled. Thermoplastic elastomers exhibit the typical advantages of both rubber and plastic materials. One exemplary benefit of thermoplastic elastomers is the ability to stretch to a moderate elongation and return to its near-original shape. In some embodiments, this allows the composition and/or article to have a longer life and/or better physical range than a material lacking the thermoplastic elastomer.

In some embodiments, the adhesive composition comprises between about 10 wt.% to 50 wt.% of the thermoplastic elastomer. In some embodiments, the adhesive composition comprises between about 15 wt.% to 45 wt.% of the thermoplastic elastomer. In some embodiments, the adhesive composition comprises between about 20 wt.% to 40 wt.% of the thermoplastic elastomer. In some embodiments, the adhesive composition comprises at least about 10 wt.%, or at least about 15 wt.%, or at least about 20 wt.%, or at least about 25 wt.% of the thermoplastic elastomer. In some embodiments, the adhesive composition comprises less than about 50 wt.%, or less than about 45 wt.%, or less than about 40 wt.%, or less than about 35 wt.% of the thermoplastic elastomer.

Exemplary thermoplastic elastomers that may be included in the adhesive compositions of the present disclosure include, for example, styrene triblock copolymers, thermoplastic polyolefin elastomers, thermoplastic polyurethanes, thermoplastic copolyesters, thermoplastic polyamides, and mixtures thereof. In some embodiments, the thermoplastic elastomer comprises at least one triblock copolymer consisting of styrene-isoprene-styrene (SIS), styrene-isoprene/butadiene-styrene (SIBS), styrene-butadiene-styrene (SBS), styrene-ethylene/butylene-styrene (SEBS), and styrene-ethylene/propylene-styrene (SEPS).

In some embodiments, the total content of all styrene units in the thermoplastic elastomer is from about 5% to about 50%, or from about 10% to about 50%, or from about 20% to about 45%, based on the total weight of the thermoplastic elastomer. In some embodiments, the total content of all styrene units in the thermoplastic elastomer is greater than about 5%, or about 10%, or about 15%, or about 20%, based on the total weight of the thermoplastic elastomer. In some embodiments, the total content of all styrene units in the thermoplastic elastomer is less than about 50%, or less than about 45%, based on the total weight of the thermoplastic elastomer.

In some embodiments, the TPE comprises isoprene blocks. In some embodiments, the isoprene block is hydrogenated isoprene. In some embodiments, the isoprene block is a polymodal asymmetric multi-arm block.

In some embodiments, the thermoplastic elastomer comprises a diblock copolymer. Some exemplary diblock copolymers included in the adhesive compositions of the present disclosure include, for example, styrene-isoprene, Styrene Butadiene Isoprene (SBI), Styrene Isoprene Butadiene (SIB), styrene-butadiene, styrene-ethylene/butadiene (SEB), and/or styrene-ethylene-propylene (SEP). In some embodiments where the thermoplastic elastomer comprises a diblock copolymer, the weight percentage of diblock copolymer in the thermoplastic elastomer is less than 40%, or less than 20%, or less than 10%, based on the total weight of the triblock copolymer and diblock copolymer mixture. This amount allows the adhesive composition to maintain low tack and/or good bond strength.

One exemplary preferred thermoplastic elastomer is a triblock copolymer of styrene-isoprene-styrene (SIS) copolymer. In some embodiments, the triblock copolymer of styrene-isoprene-styrene (SIS) copolymer has a total styrene content of between about 20% and about 45%. Some exemplary commercially available triblock SIS that may be used in the adhesive compositions described herein are Vector 4411A or 4215A, both sold by TSRC Corporation (TSRC Corporation). Other commercially available triblock SIS's that can be used in the adhesive compositions described herein include the Hybrar sold by Colorado Corporation (Kuraray Corporation)^TM5125 and 7125, Kraton 1340, 1114, and 1164P sold by Kraton corporation, and Quintac 3460 sold by ruing corporation.

In some embodiments, the thermoplastic elastomer is non-tacky at an ambient temperature of about 25 ℃ and has a viscosity of greater than 3 x 10 at 25 ℃ when measured by a dynamic mechanical rheometer at a frequency of about 1Hz⁵G' of P (storage modulus). (i.e., higher than the "Adhesion and Adhesives Technology and Introduction" by Alphonus V. Pocius) at page 231The defined Dahlquist Criterion for tack).

Filler material：

In some embodiments, fillers are used to reduce the tack and adhesion of the adhesive composition. Any filler material generally known to those skilled in the art may be used in the adhesive compositions of the present disclosure. Some exemplary filler materials that may be used in the adhesive compositions of the present disclosure include, for example, expanded perlite, microspheres, expandable microspheres, ceramic spheres, zeolites, clay fillers, glass beads, silica-type fillers (including hydrophobic silica-type fillers and hydrophilic silica-type fillers and/or fumed silica), fibers (including glass fibers, carbon fibers, graphite fibers, silica fibers, and/or ceramic fibers), nanoparticles, talc, calcium carbonate, aluminum silicate, titanium dioxide, silica, diatomaceous earth, waxes (such as polyethylene wax), and any combination thereof.

In some embodiments, the total filler content in the adhesive composition is from about 10 wt% to about 45 wt%. In some embodiments, the total filler content in the adhesive composition is from about 12 wt% to about 40 wt%. In some embodiments, the total filler content in the adhesive composition is from about 17 wt% to about 35 wt%. In some embodiments, the total filler content in the adhesive composition is greater than about 10 wt.%, or about 11 wt.%, or about 12 wt.%, or about 13 wt.%, or about 14 wt.%, or about 15 wt.%, or about 17 wt.%, or about 18 wt.%, or about 19 wt.%, or about 20 wt.%. In some embodiments, the total filler content is less than about 45 wt.%, or about 42 wt.%, or about 40 wt.%, or about 37 wt.%, or about 35 wt.%.

In some embodiments, the total filler content in the adhesive composition is from about 10PHR (parts per 100 parts total weight of rubber and thermoplastic elastomer) to about 100 PHR. In some embodiments, the total filler content in the adhesive composition is from about 15PHR to about 75 PHR. In some embodiments, the total filler content in the adhesive composition is about 15PHR to 60 PHR. In some embodiments, the total filler content in the adhesive composition is greater than about 10PHR, or about 15PHR, or about 20 PHR. If the filler loading is less than about 10PHR, the tack and adhesion of the adhesive composition may be too high. If the filler loading is greater than about 100PHR, the self-adhesive strength of the adhesive composition may be reduced.

In some embodiments, the filler has an average particle size of from about submicron to about 100 um. In some embodiments, the filler has an average particle size of about 1um to about 50 um. In some embodiments, the filler has an average particle size of about 3um to about 25 um. In some embodiments, the filler particle size is greater than the adhesive coating thickness, which may impart surface roughness and/or reduce the contact area and/or tack of the adhesive coating.

UV stabilizers and heat stabilizers：

Any UV and/or thermal stabilizer may be used in the adhesive compositions of the present disclosure. Antioxidants can retard oxidative attack on natural and synthetic rubbers, which can cause the rubber-based adhesives to lose cohesive strength. Useful antioxidants include, but are not limited to, amines such as N-N' di- β -naphthyl-1, 4-phenylenediamine, available under the trade name "AgeRite D"; phenols, such as 2, 5-di- (tert-amyl) hydroquinone, under the trade name "Santovar A^TM"available from Monsanto Chemical Co.); tetrakis [ methylene-3- (3',5' -di-tert-butyl-4 ' -hydroxyphenyl) propionate]Methane, under the trade name "IRGANOX^TM1010 "available from Ciba-Geigy Corp; and 2-2' -methylenebis (4-methyl-6-tert-butylphenol), available under the trade designation "antioxidant 2246"; and dithiocarbamates, such as zinc dithiodibutylaminoate, octadecyl-3- (3, 5-di-tert-butyl-4-hydroxyphenyl) -propionate, under the trade name "IRGANOX^TM1076 "from Ciba-Jiaji; 3,3' -Didodecyl thiodipropionate under the trade name "Arenox DL", dilauryl thiodipropionate under the trade name "DLTDP "available from Mayzo, Inc;tinuvin stabilizers and uv absorbers such as Tinuvin 900, 1130, 400, 405, 144, 783 and 292.

Other additives：

Tackifying resins and plasticizers may be used in the adhesive composition as long as the resulting adhesive composition has a tack of <30 grams, more preferably <20 grams, most preferably <10 grams. Exemplary tackifier resins include aliphatic and aromatic hydrocarbon resins, polyterpenes, and hydrogenated resins. Exemplary resins commercially available include Wingtack Plus and Wingtack 95 available from Cray Valley; piccolyte HM-85, HM-105 and S-115 available from Hercules, Inc.; escorez 5380, Escorez 5300 available from Exxon Chemical Co; regalrez 1094 and Regalrez 1126 available from hercules; and Arkon P-90 and Arkon P-100 available from Arakawa Chemical Co.

Plasticizers may be used in the adhesive compositions of the present disclosure. Exemplary plasticizers include naphthenic oils such as "Shellflex" 371 available from Shell Chemical Co; paraffin oil; an aromatic oil; and mineral oils such as "Kaydol" oil available from Witco Chemical Corp.

Properties/advantages of adhesive composition：

The adhesive compositions described herein have various advantages over existing adhesive compositions. In some embodiments, the adhesive composition is extrudable and/or co-extrudable. As described herein, this presents various advantages, including reduced manufacturing costs and enhanced sustainability and environmental friendliness. In addition, some embodiments of the adhesive composition do not contain natural rubber, thereby limiting their risk of causing undesirable allergic reactions in the user. In some embodiments, the adhesive composition (once placed on the backing or core) exhibits a strong resistance to package pop-open testing.

Adhesive film：

The present disclosure also relates to adhesive films comprising any of the above adhesive compositions. In some embodiments, such adhesive films comprise any of the adhesive compositions described herein adjacent to a backing or core layer. In some embodiments, the tie layer is located between the backing and the adhesive composition. In some embodiments, an additional seal layer is adjacent to the side of the backing opposite the adhesive composition. In some embodiments, the film is rollable and/or may be in the form of a rolled article. In some embodiments, the carrier or core layer is the layer intended to carry the adhesive layer so that it can be applied in another location. In such embodiments, the carrier or core layer serves as a release layer for the purpose of facilitating transfer of the adhesive composition. Some exemplary adhesive articles are shown in the following figures.

Fig. 1 is a cross-sectional side view of an adhesive article 100 including an adhesive portion or layer 110 (having a first major surface 112 and a second major surface 114) adjacent to a backing or core portion or layer 120 (having a first major surface 122 and a second major surface 124). In some embodiments, the backing or core portion or layer 120 provides support for the adhesive composition. In some embodiments, the backing or core portion or layer 120 provides strength and structure to facilitate manufacturing, shipping, and use, for example, during unwinding and web transport. In some embodiments, the backing or core portion or layer 120 enhances the ability of the adhesive composition to resist deformation during the heat lamination process. In some embodiments, one or more layers or portions (including the adhesive layer 110 and the backing layer 120) may have a single or multi-layer construction. The following is more information about each of these layers or portions.

Fig. 2 is a cross-sectional side view of an adhesive article 200 that includes an adhesive portion or layer 210 (having a first major surface 212 and a second major surface 214) adjacent to a bonding portion or layer 240 (having a first major surface 242 and a second major surface 244) adjacent to a backing or core portion or layer 220 (having a first major surface 222 and a second major surface 224). The tie layer or portion 240 enhances the T-peel performance of the adhesive article and/or improves the bond strength between the adhesive layer 210 and the backing 220. In some embodiments, one or more layers or portions (including the adhesive layer 210, the backing layer 220, and/or the tie layer 240) may have a single or multi-layer construction. The following is more information about each of these layers or portions.

Fig. 3 is a cross-sectional side view of an adhesive article 300 comprising the following layers or portions: (1) an adhesive portion or layer 310 (having first and second major surfaces 312, 314) adjacent to (2) a bonding portion or layer 340 (having first and second major surfaces 342, 344) adjacent to (3) a backing or core portion or layer 320 (having first and second major surfaces 322, 324) adjacent to (4) a sealing layer 360 (having first and second major surfaces 362, 364). In some embodiments, the sealing layer 360 is a heat sealing layer. Typically, a heat-seal layer is created by two sealing surfaces that are heated and immediately placed in intimate contact under a given pressure for a specified amount of time and allowed to cool, which forms a bond between the two layers. In some embodiments, the heat-seal layer allows the adhesive article to be quickly heat fused to another article. In some embodiments, the sealing layer 360 provides an anti-blocking function during unwinding of the roll or winding head of the adhesive article. In some embodiments, the sealing layer 360 is referred to as a skin. In some embodiments, the sealing layer 360 can be printed using techniques known to those skilled in the art. In some embodiments, one or more layers or portions (including the adhesive layer 210, the backing layer 220, and/or the tie layer 240) may have a single or multi-layer construction. The following is more information about each of these layers or portions.

Fig. 4 is a cross-sectional side view of an adhesive article 400 that includes all or part of the adhesive article 300 shown in fig. 3, except that at least some of the layers are multi-layered. Specifically, in this exemplary embodiment, the adhesive portion or layer 410 is a single layer (but may be multiple layers). In this exemplary embodiment, the bonding layer or portion 440 is shown as a single layer (but may be multiple layers). In this exemplary embodiment, the backing or core layer 420 is shown as five layers or layers. One skilled in the art will appreciate that the backing or core layer 420 can be any desired number of layers including, for example, 1, 2, 3, 4, 5, 6, 7, etc. In this exemplary embodiment, the sealing layer 460 is shown as two layers and a multilayer. One skilled in the art will appreciate that the sealing layer 460 can be any desired number of layers, including, for example, 1, 2, 3, 4, 5, 6, 7, etc. In this exemplary embodiment, the entire adhesive article is a 9-layer, multi-layer construction. However, one skilled in the art will appreciate that the overall construction (meaning the adhesive film and/or adhesive article) can be any desired number of layers, including, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

Additional information about the above-mentioned parts or layers is as follows. For clarity, the ratio of the thickness of the multilayer film and the layer thickness of the one or more additional layers will depend on the intended end use of the multilayer construction.

Adhesive composition layer or part

Any of the adhesive compositions described herein can be used in any of the adhesive articles described herein.

In some embodiments, the adhesive composition layer or portion has a thickness of between about 5 microns and about 100 microns, or between about 10 microns and about 50 microns. In some embodiments, the adhesive composition layer or portion has a thickness of greater than about 5 microns, or about 10 microns, or about 25 microns. In some embodiments, the adhesive composition layer or portion has a thickness of less than about 100 microns, or about 75 microns, or about 50 microns, or about 25 microns. In some embodiments, the thickness of the adhesive layer is less than the particle size of the filler.

Bonding layer or part

The tie layer enhances the T-peel performance of the adhesive article and/or improves the bond strength between the backing and the adhesive composition. Any desired tie layer that enhances the T-peel performance of the adhesive article and/or the bond between the adhesive composition and the backing or core layer may be used. In some embodiments, the tie layer or portion is a thermoplastic elastomer having a storage modulus at ambient temperature of 25 ℃ that is less than the storage modulus (G') of the adhesive composition when measured by a dynamic mechanical rheometer at a frequency of about 1 Hz. In some embodiments, the tie layer comprises a primer. In some embodiments, the tie layer improves viscoelastic deformation and/or absorbs energy from the system.

Some exemplary thermoplastic elastomers that may be used include, for example, triblock copolymers (e.g., styrene-isoprene-styrene (SIS), styrene-isoprene/butadiene-styrene (SIBS), styrene-butadiene-styrene (SBS), styrene-ethylene/butylene-styrene (SEBS), and styrene-ethylene/propylene-styrene (SEPS)) and diblock copolymers (e.g., styrene-isoprene, styrene butadiene isoprene, styrene isoprene butadiene, styrene ethylene/butadiene, and styrene ethylene propylene).

In some embodiments, the weight percent of the diblock copolymer in the tie layer or portion is between about 20 wt.% and about 85 wt.% based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the weight percent of the diblock copolymer in the tie layer or portion is between about 30 weight percent to about 80 weight percent, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the weight percent of the diblock copolymer in the tie layer or portion is between about 40 weight percent to about 80 weight percent, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the weight percent of the diblock copolymer in the tie layer or portion is greater than about 20 weight percent, or greater than about 30 weight percent, or greater than about 40 weight percent, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the weight percentage of the diblock copolymer in the tie layer or portion is less than about 85 wt.%, or less than about 80 wt.%, or less than about 70 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion.

In some embodiments, the total content of styrene units of the tie layer or portion is from about 5 wt.% to about 30 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the total content of styrene units of the tie layer or portion is from about 5 wt.% to about 25 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the total content of styrene units of the tie layer or portion is from about 5 wt.% to about 20 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the total content of styrene units of the tie layer or portion is greater than about 5 wt.%, or about 6 wt.%, or about 7 wt.%, or about 8 wt.%, or about 9 wt.%, or about 10 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the total content of styrene units of the tie layer or portion is less than about 30 wt.%, or about 25 wt.%, or about 20 wt.%, or about 15 wt.%, based on the total weight of the triblock copolymer and diblock copolymer in the tie layer or portion. In some embodiments, the thermoplastic elastomer is a blend of a triblock copolymer of styrene-isoprene-styrene (SIS) copolymer and a diblock of styrene-isoprene copolymer, wherein the total styrene content is between about 5 wt.% and about 25 wt.%. In some embodiments, the thermoplastic elastomer is a triblock copolymer of styrene-isoprene-styrene (SIS) copolymer with a total styrene content between about 5 wt% and about 25 wt%.

Some commercially available exemplary bonding layers include Kraton, both sold by Kraton corporation^TMD1119 and D1161 and vectors 4186 and 4187, both sold by Dexco Corporation (Dexco Corporation).

In some embodiments, the bonding layer or portion has a thickness of between about 5 microns and about 50 microns, or between about 15 microns and about 25 microns. In some embodiments, the bonding layer or portion has a thickness greater than about 5 microns, or 10 microns, or 15 microns, or 20 microns, or 25 microns. In some embodiments, the bonding layer or portion has a thickness of less than about 50 microns, or about 40 microns, or about 30 microns, or about 25 microns.

It should be noted that a bonding layer or portion is not necessary, and thus in some embodiments a bonding layer or portion will not be used. Surprisingly, there is no need to use a tie layer or part to laminate the adhesive composition layer or part to the core or backing layer or part, since the adhesive layer or part will be laminated to the backing or core layer or part, e.g. upon coextrusion. This is particularly surprising when the backing or core layer or portion is polyethylene.

For some applications, such as those where it is desirable for the bond between two adhesive layers or portions to be more easily debonded, lower T-peel performance may be desired. In such applications, it may be beneficial to omit the bonding layer or portion. Omitting the bonding layer or portion may also be beneficial in other applications. In other applications, it is desirable to increase the T-peel performance, and in such applications, it may be desirable to include a tie layer or portion. When a tie layer is used, the choice of tie layer will depend on the desired T-peel performance of the final product as well as the characteristics of the core or backing layer or portion.

In some embodiments, the tie layer or portion does not comprise a tackifier, for example, because it is not necessary to laminate the layer or portion of the adhesive composition to the backing or core layer or portion. In some embodiments, the tie layer or portion is not a Pressure Sensitive Adhesive (PSA).

Core or backing layer or part

Any known backing or core layer, portion or material may be used. Some suitable exemplary backings or core layers include plastics (e.g., polypropylene (including biaxially oriented polypropylene) vinyl, polyolefins (such as polyethylene), polyurethanes, urethane acrylates, polyesters (such as polyethylene terephthalate)), nonwoven fabrics (e.g., paper, cloth, nonwoven scrims), metal foils, foams (e.g., polyacrylics, polyethylene, polyurethane, neoprene), and the like.

In some embodiments, the core or backing layer or portion has a thickness of between about 0.5 mil and about 10 mil, or between about 0.75 mil and about 5 mil. In some embodiments, the core or backing layer or portion has a thickness of greater than about 0.5 mil, or about 0.75 mil, or about 1.0 mil. In some embodiments, the core or backing layer or portion has a thickness of less than about 10 mils, or about 5 mils, or about 1 mil.

Sealing or covering or parts

Some embodiments include a seal or skin or portion. In some embodiments, the seal or skin or portion is a heat seal layer. The heat seal layer includes, for example, a heat seal layer and/or an ultrasonic seal layer. The seal or skin layer may be a single layer or multiple layers. The sealing layer may be and/or may include a transfer adhesive.

In some embodiments, the seal or skin layer comprises polyethylene (HDPE, LDPE, LLDPE, mLLDPE), polyolefin copolymer, thermoplastic elastomer. In some embodiments, the seal or skin layer comprises at least one of the following commercially available components: dowlex 2045LLDPE sold by the Dow Chemical company (Dow Chemical), Marlex mLLDPE sold by the Chevron Phillips Chemical company (Chevron Phillips Chemical), Dow EliteAT 6410mL LDPE sold by Dow Chemical, Affinity 1850G sold by the Dow Chemical company and/or mixtures thereof. In some embodiments, the seal or skin layer further comprises a blend of the above LLDPE, mLLDPE or polyethylene copolymer with an antiblock agent or release material, such as Polyfil ABC 5000 and/or Ethylene Bis Stearamide (EBS).

In some embodiments, the seal or skin layer or portion has a thickness of between about 0.2 mil and about 3 mil, or between about 0.4 mil and about 1 mil. In some embodiments, the seal or skin layer or portion has a thickness greater than about 0.2 mil, or about 0.3 mil, or about 0.4 mil, or about 0.5 mil, or about 0.75 mil, or about 1.0 mil. In some embodiments, the seal or skin layer or portion has a thickness of less than about 3 mils, or about 2 mils, or about 1 mil.

Method of making adhesive film and/or article：

In some embodiments, the adhesive compositions described herein may be extruded, solvent coated, and/or blown into or onto a film. Extrusion, coextrusion, and blown film processes offer the advantage that they are more environmentally friendly than solvent coating processes, at least because they do not require expensive or environmentally unfriendly solvent treatments. The following is more information about each of these processes.

Extrusion process：

Extrusion processes typically involve compounding (by, for example, calendering, roll milling, or twin-screw) and extruding (by, for example, single screw, twin-screw, disc screw, reciprocating single screw, pin-barrel single screw, etc.) materials through feedblocks and/or dies. In some embodiments, extrusion processing is a process that is substantially free of solvent and water. The feedblock and/or the die may include one or more channels for the flow of material feedstock.

The first step, i.e. compounding, can be carried out by, for example, commercially available equipment such as a Brabender or BANBURY internal mixer, which batch mixes the adhesive composition. After compounding, the adhesive can be extruded or co-extruded with other raw materials through a die into the desired adhesive film construction in a single step.

Coextrusion is an extrusion coating. Coextrusion typically involves the simultaneous melt processing of multiple melt streams and the combination of such melt streams into a single unitary structure or coextruded film.

Blown film and cast extrusion processes are types of coextrusion achieved through a single extrusion die. The blown film process typically begins by forming a tube and subsequently pressing the tube. The tube may then be separated into two films (e.g., by cutting) or the tube may be formed into a single film (e.g., if the innermost layer is bonded to itself).

The extrusion process involves processing one or more raw materials through a die at or above their melting temperature to extrude a coextruded film. Coextruded or blown films are generally composites of all the melt feeds present in the coextrusion process. In some embodiments, the coextruded film or blown film is multilayer. In some embodiments, at least some of the layers are in contact with each other in the molten state. In some embodiments, one or more of the layers are in contact throughout the extrusion process (e.g., one or more layers are in contact as soon as they are melted).

The coextruded film may also be further processed, for example by orientation. One example of orientation of a film is biaxial orientation. Biaxial orientation involves stretching the film in two directions perpendicular to each other, typically the downweb and crossweb directions. In a typical operation, the freshly extruded molten film is fed to a chill roll to produce a quenched amorphous film, which is briefly heated and stretched in the down-web direction, and then stretched in the transverse direction by a tenter frame under moderate heating conditions. The stretching in the longitudinal direction of the web may be accomplished by passing between two sets of nip rollers, the second set rotating at a higher speed than the first set.

Adhesive articles have been manufactured using extrusion techniques as shown, for example, in U.S. patent No. 5660922 (co-extruded double-sided adhesive tape) and U.S. patent No. 6777053, both of which are incorporated by reference in their entirety. Some embodiments include a release material blend to form a release film. See, for example, U.S. patent application 2004-0127121, which is incorporated herein by reference in its entirety.

The use of a coextrusion process and a coextrudable composition has many advantages. For example, co-extrusion eliminates the additional coating step, thereby being a more cost effective and efficient manufacturing process, which reduces overall cost and/or time. In addition, the co-extrusion process can reduce the carbon footprint of the production line, which is more sustainable and environmentally friendly. Further, in some embodiments, co-extrusion eliminates the need for solvents and/or water, and thus the process eliminates the need for expensive and environmentally unfriendly solvent treatment.

In some embodiments, it may be desirable to apply the adhesive layer and/or tie layer or portion to less than the entire surface of the backing/core layer or portion. One exemplary method of making such constructions includes the use of a screen roll or rotary screen printing device that selectively applies the build-up and coating only to specific areas of the backing or core layer or portions. Alternatively, a spray head or series of spray heads may be used to selectively deposit a specific or random pattern of adhesive composition on the backing or core layer or portion. The pattern is arranged to obtain the desired adhesive adhesion. In some embodiments, the adhesive material or layer is applied to substantially all (e.g., at least 75% of the total surface area) of one major surface of the backing or core layer or portion. In some embodiments, the adhesive material or layer is applied to at least 80%, or at least 85%, or at least 90%, or at least 95%, or at least 97%, or at least 99% of the total surface area of one major surface of the backing or core layer or portion.

In some embodiments, it may be desirable to place at least some of the adhesive composition on both sides of the backing or core material or layer. In some embodiments, such constructions further include tie layers on each side of the core or backing layer between the major surface of the backing and the adhesive layer or material. In some embodiments, at least one of the adhesive layers in these constructions is adjacent to a release liner.

In some embodiments, the adhesive article is or can be made, for example, as a roll or a flat sheet. In embodiments configured for manufacture and/or storage as a roll or roll good, because the adhesive layer or material only substantially adheres to itself, when the adhesive film or article is rolled up, the coated adhesive surface does not contact and no barrier is needed to prevent the sheet material from adhering to itself when stored on the roll.

In some embodiments, the adhesive layer or material may be printed or visibly marked. In some embodiments, the adhesive film may be printed or visibly marked on one major surface of the sealing layer. In some embodiments, the exposed major surface of the adhesive material or layer may be printed or visibly marked. Any known printing technique may be used, including, for example (e.g., flexographic, gravure, and/or screen printing). Any known ink and printing material may be used. In some embodiments, the core or backing may be visibly marked or printed. In some embodiments, unique visual effects can be achieved, including, for example, anti-adhesion effects.

In some embodiments, direct printing on the adhesive material or layer may result in reduced performance of the adhesive film and/or article. For example, printing can result in a decrease in the bond strength between layers as printing creates a barrier between layers. In such examples, printing or visible marking may be achieved by incorporating wavelength-specific absorbing particles (e.g., titanium dioxide) into the adhesive material or layer. A laser may then be used to create the printed and/or visible indicia without causing a change in the adhesive material. This may prevent or reduce the incidence of poor seal adhesion and adhesive bond failure.

Patents describing the above-described methods of printing or visually marking adhesive materials are described, for example, in U.S. patent nos. 9132506 and 8771919, both of which are incorporated herein in their entirety.

Exemplary uses of adhesive compositions and adhesive articles

The adhesive compositions and articles described herein can be used in any desired situation where an adhesive composition and/or an adhesive article or film is desired. Since some embodiments of the adhesive composition do not comprise natural rubber, it should not cause latex allergy, and thus may be particularly useful in situations where the user will come into physical contact with the adhesive during use.

In some embodiments, the adhesive article is a film and is used in packaging materials or constructions that may be used, for example, in shipping applications. This general type of construction is described, for example, in U.S. patent application No. 60/620031, which is incorporated herein in its entirety. An exemplary embodiment of such a product is shown in fig. 5, where package 500 includes an adhesive film 570 (i.e., any of the adhesive articles or films described herein) adjacent a cushioning layer 580 adjacent an outer layer 590.

In other embodiments, the adhesive composition and film are used in a fastening system. In these embodiments, the fastening system includes a first fastening element having a substrate and a first adhesive film and a second fastening element having a substrate and a second adhesive film. In some embodiments, the first adhesive film and the second adhesive film are compositionally identical. In other embodiments, the composition of the first adhesive film is different from the composition of the second adhesive film. In these fastening systems, the first adhesive composition will releasably adhere to the second adhesive composition when contacted.

In one exemplary embodiment, the fastening system is for an absorbent article, such as a diaper. Generally, such diaper fastening systems include adhesive-based closure systems, mechanical-based closure systems, or a combination of both. Mechanical-based closure systems typically include hook-like fastening elements. Adhesive-based closure systems typically rely on a landing zone Pressure Sensitive Adhesive (PSA) that adheres to the diaper. One drawback to the use of closure systems based on pressure sensitive adhesives is that these PSAs, which are tacky at room temperature, can adhere to other portions of the absorbent article, resulting in improper closure or damage to the article. In contrast, a fastening system comprising an adhesive composition and a film consistent with the present disclosure adheres only to itself, thus eliminating the aforementioned undesirable effects.

In one aspect, the present application relates to an absorbent article comprising an absorbent layer and a fastening system. In one embodiment, the absorbent layer includes a back sheet, a top sheet, and an absorbent core between the back sheet and the top sheet, and the fastening system includes a first fastening element having a first adhesive film and a second fastening element having a second adhesive film. In one embodiment, the first fastening elements are disposed on or adjacent to the first portion of the absorbent layer and the second fastening elements are disposed on the second portion of the absorbent layer. In some embodiments, the first adhesive film, the second adhesive film, or both the first adhesive film and the second adhesive film are disposed on the absorbent layer. In other embodiments, the first fastening element, the second fastening element, or both fastening elements include a substrate having an adhesive film disposed thereon.

Buffer layer

In some embodiments, the cushioning layer 580 provides shock and/or impact resistance to prevent damage to the article or item being shipped. The cushioning layer may be any desired layer that provides cushioning to an article wrapped in the packaging material or construction described herein. In some embodiments, the cushioning layer may also provide one or more of structural integrity, cushioning properties, flexibility, and/or interface functions with other components of the shipping device, among other things. In some embodiments, it is desirable for the cushioning layer to be relatively thin to avoid excessive shipping costs and/or undesirable bulk, which can make packaging more complex and/or storage more challenging.

In some embodiments, the buffer layer is a single layer. In some embodiments, the buffer layer comprises multiple layers. In some embodiments, the cushioning layer is selected from materials that deform or collapse to reduce the level of shock and vibration generated on the enclosed article, preferably below the critical threshold for article damage. Illustrative examples of materials suitable for use in cushioning members herein include materials such as foam layers (including expanded foam), bubble films or wraps, and structured polymers (e.g., honeycomb structures).

In some embodiments, the cushioning layer comprises a bubble wrap or a bubble film. As used herein, the term "bubble film" is intended to include all flexible plastic materials, including spaced apart inflated bubbles capable of providing cushioning. The term is intended to include those items referred to as blister packs, blister papers, blister packs and aircraft plastics. Some embodiments of the bubble film comprise a first thin flexible layer of plastic material having a plurality of spaced apart grooves on one surface and at least a second thin flexible layer of plastic material bonded to the one surface of the first layer to seal air into the grooves. The bubble film may comprise, for example, polyethylene as the plastic material, such as linear low density polyethylene, low density polyethylene and/or high density polyethylene. However, other suitable plastics, such as polypropylene, may be used. Some commercially available bubble films include, for example, Scotch^TMA cushioning wrap. Bubble films as described in U.S. patent application No. 80523US002, assigned to the present assignee, may also be used and is incorporated herein in its entirety.

In some embodiments, the cushioning layer comprises foam. Exemplary foams may include, for example, polyethylene, polyester, acrylic, polyurethane, polypropylene, and/or styrene. In some embodiments, the foam is structured.

Outer layer

The outer layer may be any desired outer layer that provides at least some of the features described herein. In some embodiments, the outer layer is a single layer. In some embodiments, the outer layer comprises multiple layers. As described in more detail below, in some embodiments, the outer layer is at least one of a monolayer, a bilayer, or a trilayer.

In embodiments where the outer layer is a single layer, the outer layer material may be heavy paper (such as, for example, kraft paper, etc.), plastic film (such as, for example, MYLAR @)^TM) Non-woven materials (such as, for example, TYVEK)^TM) Or treated paper (such as, for example, aluminized paper).

In some embodiments, the outer layer comprises a paper layer, which may be coated paper, kraft paper, or higher quality paper such as Bond (Bond) paper or white paper. In some embodiments, the paper may be printable and/or metallized to obtain a decorative packaging material. In some embodiments, the metallized paper layer may also have graphics disposed thereon.

In some embodiments, the outer layer comprises plastic. In some embodiments, the plastic is embossed, structured, or reinforced. In some embodiments, the plastic comprises at least one of polypropylene, polyethylene, polyurethane, polyester, and/or copolymers of any of these. In some embodiments, the polyethylene is at least one of linear low density polyethylene, and/or high density polyethylene. In some embodiments, the plastic is a thermoplastic and/or olefinic material. Plastics can be uniaxially or biaxially oriented to impart high strength thereto. Biaxial orientation may be preferred for maximum strength. One or more surfaces of the plastic layer may be corona discharge treated so that one or more of them can accept ink and print. Furthermore, if decorative packaging is desired, the plastic can be metallized by vacuum deposition.

In some embodiments, the outer layer is a bilaminate. In some embodiments, the two-layer laminate is a paper/plastic laminate. In some such embodiments, the paper layer is laminated to the plastic film layer. Another exemplary two-layer outer layer is a laminate comprising a water-impermeable plastic film having a first corona discharge treated surface adhesively cold laminated to a first paper layer.

In some such embodiments, the paper layer is cold laminated to the plastic layer. The cold lamination process enables the present packaging material to be manufactured at a much higher speed than when using other adhesives, such as hot melt adhesives, for example, due to the additional time required to cool the hot melt adhesive before the secure bond is achieved. If a plastic film is joined to paper using a hot melt adhesive instead of cold lamination, the heat of the adhesive may cause the film to shrink, resulting in a loss of strength. In addition, hot melt adhesives do not reach their final bond strength until the adhesive cools, and the plastic film may shrink before this occurs. Furthermore, wrinkling or curling of the product often results due to the difference in the high and low strength areas of the plastic film. The use of cold lamination is also advantageous when using uniaxially or biaxially oriented plastic films. It is known that at elevated temperatures, such films relax and lose molecular orientation and strength. For example, when two biaxially oriented polyester films are stitched together using an ultrasonically activated sealing bar to create internal friction and heat within the film, the film softens and fuses, with the resulting seal line being weak such that the sheet then tends to tear along the line. Similar problems are encountered if the oriented film is exposed to high heat, such as if the film is joined to paper using hot melt adhesives. Cold lamination with hot melt, solvent based water-based or transfer adhesives can produce laminates with high strength.

In some embodiments, the bilayer construction (or a portion thereof) is subjected to corona discharge treatment. The plastic may be subjected to this treatment immediately prior to the first corona discharge treated surface being adhesively laminated to the paper layer. This enables a strong bond to be achieved between the plastic and the paper to form a paper-plastic film laminate having opposed first and second outer surfaces.

In some embodiments, the outer layer is three layers. In some embodiments, the above-described two-ply material may further include additional paper layers to form a paper-plastic-paper three-ply laminate sheet. An additional paper layer may be desirable for packaging objects with sharp edges or only when a packaging material with higher strength is required. Since the paper layers form the inner and outer sides of the packaging material, they can easily be printed with graphics or other indicia before the application of the cushioning material and/or adhesive material. This gives the packaging material one appearance on the outside of the package and a different appearance on the side of the material facing the item being shipped. When a three-ply paper/plastic/paper laminate is used, the outermost portion of the outer ply may be readily printed using any of a variety of well-known techniques including screen printing and the like. The innermost portion of the outer layer (e.g., a plastic film) provides moisture resistance to the article or item wrapped by the wrapper. Another exemplary outer layer is a trilaminate including a water impermeable plastic film having first and second corona discharge treated surfaces adhesively cold laminated to first and second paper layers. In some embodiments, the outer layer is more than three layers.

It may also be desirable for the packaging material to have a printable surface for printing logos, messages, advertisements, insignia, trademarks or simply recipient information, etc. on the outer or inner surface of the formed package. In this regard, the outer layer may comprise a printable surface. In some three-layer embodiments, the outer layer may include a second corona discharge treated surface to render it ink receptive so that a graphic may be presented.

The outer surface of the material should be capable of being provided with indicia or other printed information. If the material itself does not accept such printed information, it can be processed to be acceptable. For example, a polyethylene plastic film having an outer surface treated by corona discharge may then be printed or provided with printed indicia. Although not preferred, the indicia may also be applied to the wrapper by way of adhesive backed stickers, labels, and the like.

In some embodiments, the outer layer has a thickness greater than about 0.5 mils. In some embodiments where the outer layer is paper, the outer layer has a thickness of greater than about 3 mils.

In some embodiments, at least a portion, and in some cases substantially the entire outer layer is writable (e.g., writable with a conventional writing instrument such as a pen, pencil, and/or marker). In some embodiments, this may be accomplished by selecting a material for the outer layer that inherently provides this property. In some embodiments, this may be accomplished by treating at least a portion of the surface of the selected outer layer to impart the desired writability and/or adhesion (e.g., an adhesive backed paper or label). In some embodiments, imparting adhesion involves treating the interior of the outer layer, which will also aid in the bonding of the adhesive layer and/or the buffer layer in a multilayer construction. In some embodiments, this is accomplished by incorporating a suitable skin over at least selected portions of the housing.

Furthermore, if desired, in one embodiment a decorative package is provided in which the outer surface of the packaging material is metallized or aluminized. If a silver finish is desired, an aluminized surface is preferred. Other metallization treatments, such as treatment with copper, iron, or alloys, may be used when other colors are desired.

In some embodiments, the outer layer is water impermeable.

In some embodiments, the outer layer has sufficient tear and scratch resistance such that the wrapped article remains secured and protected during shipping and handling.

In some embodiments, the outer layer comprises one or more materials that provide at least one of thermal or acoustic insulation and/or radiation protection.

Application method：

The use of the packaging material or construction is simple and intuitive. When the packaging material is in the form of a roll or roll goods, the user unwinds a portion of the material from the roll and cuts off the desired portion to separate it or remove it from the roll. With the packaging material placed in a flat position, the material is simply cut to the desired length. The packaging material may then be placed on a flat surface with the outer surface facing down/on the flat surface and the adhesive layer facing up/exposed to the user. As schematically shown in fig. 6, an article or article 610 to be shipped is placed on an exposed adhesive surface 620 of a packaging material 600. The adhesive surface/material 620 does not adhere to the goods because the adhesive material only adheres to itself. In some embodiments, it may be preferable to place the article or article 610 in the center or middle of the packaging material 600. In some embodiments (as shown), it may be preferable to place the article or article 610 in the first half or the second half of the cut in the packaging material 600.

As shown in fig. 7, the packaging material 600 is then folded over the article or item 610 to be shipped. In this step, opposing adhesive layers or material coated surfaces 620 of the packaging material 600 are brought into contact with each other, thereby enclosing the article or item 610 to be shipped. Next, the user presses the packaging material 600 together to form a tight bond or seal between the adhesive layers 620, which are now closely or directly adjacent to each other. This step forms an adhesive-to-adhesive bond between two adjacent adhesive layers 620, thereby forming a bond to hold the packaging material or construction 600 in a desired configuration for use as a self-closing and/or custom shipper. In this way, a sealed package is formed which has a protective effect but no excess material.

Alternatively, instead of wrapping an article or item with a single sheet of wrapping material, it may be desirable to use two separate sheets of wrapping material, wherein at least a portion of each sheet has a layer of adhesive material. The two sheets of packaging material are cut to the desired length, respectively. As shown in fig. 8, a first sheet of wrapping material 802 is laid flat on a surface and an article or item 810 to be mailed is placed on top of the first sheet of wrapping material 802. The adhesive material or layer 820 does not adhere to the item 810 to be shipped because the adhesive material or layer 820 only adheres to itself. The second sheet of wrapping material 804 is placed on top of the article 810 and the first sheet of wrapping material 802 such that the adhesive coated surfaces of each sheet of wrapping material 802 and 804 are adjacent to each other. The user then presses the two layers 802 and 804 together. This ensures that immediately adjacent portions of the packaging material, including the adhesive material or layer 820, form an adhesive-to-adhesive bond and that the article or item is enclosed within the packaging material, thereby forming a self-closing and/or customized package.

The packaging material may be used for manual wrapping. Such packaging materials may be very beneficial to those who mail and ship goods relatively infrequently (e.g., housewives send nursing packs or birthday gifts several times per year) as well as to those who frequently ship items through online websites or services (e.g., Etsy or eBay). Such packaging materials allow such users to store only one packaging material that will meet all of their needs while ensuring their items are safely and protectively transported and delivered.

The packaging material may also be used in an automated packaging apparatus, wherein the resulting packages are automatically packaged by machines generally known in the art. For example, a company or business that manufactures or ships a large number of goods may prefer such usage. The use of such materials will ensure protection of the goods, but reduce shipping costs because smaller packages are shipped while providing the same or better protection of the items. Further, packaging materials provide enhanced sustainability goals due to reduced environmental waste, because: (1) less air is transported during shipment; and (2) use less packaging to ship items safely, resulting in less waste.

In one aspect, the adhesive films and compositions of the present invention are used in fastening systems. In one embodiment, the fastening system is for an absorbent article, such as a feminine hygiene absorbent article, a diaper, or an incontinence brief. Absorbent articles according to the present application are described in U.S. patent publication No. 20170196739, the disclosure of which is incorporated herein by reference in its entirety. Exemplary absorbent articles are shown in fig. 10 and 11. In particular, fig. 10 shows an isometric view of a diaper or incontinence brief 1000 comprising a back sheet 1100, a top sheet 1200, and an absorbent core (not shown) between the back sheet and the top sheet. The first fastening element 1120 is secured to the rear waist portion of the absorbent article, in particular to the inside of the rear waist portion. The second fastening element 1130 is secured to the front waist portion of the absorbent article, in particular to the outside of the front waist portion. The first fastening element 1120 includes a substrate 1127 and a first adhesive film 1125. The second fastening element 1130 includes a substrate 1140 and a second adhesive film 1135. In other embodiments, the first and second fastening elements do not include substrates 1127, 1140 and the first and second adhesive films 1125, 1135 are disposed on the backsheet 1100. In these embodiments, an optional bonding layer (not shown) may be used.

In some embodiments, the diaper or incontinence brief 1000 includes a first ear 1150a and a second ear 1150 b. Ears 1150a and 1150b each extend outwardly from the rear waist portion of diaper 1000. In these embodiments, a first fastening element is disposed on the distal portion of the first ear 1150a and a second fastening element 1130 is disposed on the distal portion of the topsheet 1200 so as to bring the first adhesive film 1125 into contact with the second adhesive film 1135 to releasably close the diaper 1000.

Figure 11 shows an isometric view of the diaper 1000 of figure 10 in a closed configuration. In particular, it can be seen that the ears 1150a and 1150b of the diaper 1000 are displaced toward the front waist portion in order to close the diaper 1000 and secure the first fastening element 1120 to the second fastening element 1130.

Benefits of：

The packaging materials and constructions of the present disclosure have many benefits. At least some of the benefits of these constructions or materials are as follows. The packaging material takes up less space and/or has a smaller or lower profile while providing the same protection as the more bulky or thicker prior art embodiments. Thus, the packaging material takes up less space during storage, whether on a shelf or in the user's home or office. Furthermore, they are less expensive to ship due to their reduced profile and/or size. This has benefits not only to manufacturers and those who pay for shipments, but also sustainability benefits, as less gas is used per shipment and less pollution is generated.

Further, the packaging materials and configurations described herein are capable of packaging articles of various sizes and shapes. The user has complete control over the materials used and the size and shape of the package formed. In this manner, the shipper or formed package may be truly custom made and/or customized. This also ensures that the items to be shipped are adequately protected without creating environmental waste and/or excessive shipping costs.

The fastening systems of the present disclosure have a number of benefits, including the ability to self-mate or co-adhere to themselves, thereby ensuring proper closure of the articles to which they are adhered.

In some embodiments, the adhesive layer, portion or material is co-adherent to itself while being capable of contacting all surfaces without substantially adhering, damaging or leaving a residue that would otherwise damage the surface and/or damage the article. In some embodiments, the adhesive will be cleanly removed from the article being shipped (i.e., without damaging the article) while adhering sufficiently firmly to itself and to another adhesive surface to secure the shipping device around the article during shipment. The adhesive layer or material preferably adheres sufficiently to itself and to the other surface of the cushion layer to form a strong bond sufficient to remain adhered or bonded in a desired configuration or orientation when the package is shipped. This may include traveling through varying temperatures (e.g., in a truck driving through arizona desert in july and in outside heat on the customer's steps of alaska in january). This may also include jostling and throwing of the package during transport and delivery.

In some embodiments, the adhesive article has a tack of less than 30gf, an adhesion to a surface other than adhesive of less than 200g/in, a T-peel of greater than 200g/in, and passes the pop-open test, wherein all tests are performed as described herein. In some embodiments, the adhesive article has a tack of less than 20gf, an adhesion to a surface other than adhesive of less than 150g/in, a T-peel of greater than 400g/in, and passes the pop-open test, wherein all tests are performed as described herein. In some embodiments, the adhesive article has a tack of less than 10gf, an adhesion to a surface other than adhesive of less than 100g/in, a T-peel of greater than 600g/in, and passes the pop-open test, wherein all tests are performed as described herein.

In some embodiments, the adhesive compositions and/or articles of the present disclosure have a tack of less than 30gf, or less than 25gf, or less than 20gf, or less than 15gf, or less than 10gf, wherein tack is measured in accordance with ASTM D2979.

In some embodiments, the adhesive compositions and/or articles of the present disclosure have an adhesion to surfaces other than adhesives of less than 200g/in, or less than 175g/in, or less than 150g/in, or less than 125g/in, or less than 100g/in, or less than 75g/in, or less than 50g/in as measured according to PSTC-101 test method a test method using an Instron with a peel angle of 180 ° and a chuck speed of 90 inches per minute.

In some embodiments, the adhesive compositions and/or articles of the present disclosure have a T-peel of greater than 200g/in, or greater than 300g/in, or greater than 400g/in, or greater than 500g/in, or greater than 600g/in, or greater than 700g/in, when measured using an Instron according to ASTM D-1876 at a chuck speed of 12 in/min.

In some embodiments, the adhesive article passes the pop-open test in addition to one or more of the other performance characteristics described herein.

The following examples describe some exemplary configurations of adhesive compositions, adhesive articles, and methods of making the adhesive compositions and articles that fall within the scope of the disclosure. The following examples describe some exemplary configurations and methods of constructing various embodiments within the scope of the present disclosure. The following examples are intended to be illustrative, but not limiting, of the scope of the invention.

Examples

All parts, percentages, ratios, etc. in the examples, as well as the remainder of the specification, are by weight unless otherwise indicated. The following abbreviations are used: cm is equal to centimeter; mm is millimeter; in is inch; m is rice; RPM is revolutions per minute; kg is kg; oz ═ ounce; lb is pounds; pa ═ pascal; min(ii) minutes; hr-hour; gsm-grams per square meter (g/m)²) (ii) a DW-downweb (or alternatively MD-machine direction); CW-crossweb; lbf is pound force; n ═ newton; PHR is parts per hundred rubber. The terms "wt%", "% by weight" and "wt%" are used interchangeably.

Examples 1-7 and comparative examples A-C

Information on the materials used in examples 1-7 and comparative examples A-C is set forth below.

TABLE 1 materials used in examples 1-7 and comparative examples A-C

Adhesive compositions 1-7 and comparative examples a-C were prepared by compounding the components listed in tables 1-4 at 250rpm, 300 ° f, and 10 pounds per hour in a twin screw extruder to form pre-compounded adhesive ropes. Table 2 shows the composition in parts per hundred rubber. Table 3 shows the composition of the components in weight%. Table 4 shows the composition of rubber, TPE and filler in weight percent (where rubber, TPE and filler are based on the total weight of rubber, TPE and filler) and heat and UV stabilizers in parts per hundred (pph) rubber + TPE + filler. Table 5 shows compositions in which all components are listed in weight%.

TABLE 2 adhesive compositions of examples 1-7 and comparative examples A-C, all in terms of PPHR (parts per hundred rubber)

TABLE 3 adhesive compositions of examples 1-7 and comparative examples A-C (all in weight percent)

All in weight% based on the total weight of rubber + TPE; CaCO3, antioxidant and UV stabilizer in parts per 100 parts rubber + TPE

TABLE 4 adhesive compositions of examples 1-7 and comparative example C

Rubber, TPE and filler in weight% based on the total weight of rubber, TPE and filler; heat and UV stabilizers in parts per hundred (pph) rubber + TPE + filler

TABLE 5 adhesive compositions of examples 1-7 and comparative examples A-C (all in weight percent)

Various adhesive films were prepared using the adhesive compositions listed above. Information on the materials used in these adhesive films is provided in table 6 below.

TABLE 6 adhesive film materials used in examples 8-14 and comparative examples D-F

Abbreviations	Description of the invention	Source
			Dowlex 2045	LLDPE	THE DOW CHEMICAL Co.
Polyfil ABC 5000	Polyethylene solution of 50% talc	Polyfil corporation (Polyfil Co.)
			Dow Elite 5960G	HDPE	THE DOW CHEMICAL Co.
Kraton D1119	SIS block copolymers	Corteng Corp Ltd

Seven-layer adhesive films were prepared on a seven-layer flat stack mold (LF-400 Coex 7-layer type, available from laboratory science Engineering). The air flow to the die was manually controlled to achieve a blow-up ratio of about 2: 1. The bubble was then collapsed about six feet (2 meters) above the die, traversed across a roller, slit at the edge to produce two separate films, and then each of the films was wound onto a 3 inch (7.5cm) core and rolled up. The feed was supplied from 7 separate (3/4 inch) 20mm diameter extruders (each a Labtech Scientific LE20-30/C HA single screw extruder).

Layers 1-6 were fed using polymer pellets and masterbatch compound blends as known in the art. Layer 7 (outside the bubble layer) was fed by precompounding "ropes" (described below) of adhesive material into a twin screw extruder connected to extruder #7 via heated hoses. The process conditions and the formula are as follows:

the temperatures of the extruder 1-7 are respectively as follows: 360 DEG F, 390 DEG F, 330 DEG F and 360 DEG F.

Mold temperature and adapter temperature: 390 ℉

Each of layers 1-6 has a thickness of 0.33 mils. The thickness of layer 7 was 0.50 mils.

The composition of each construction is described in table 7 below.

TABLE 7 adhesive films of examples 8-14 and comparative examples D-F

Adhesive compositions 15-18 were prepared by compounding the components listed in tables 8-11 (and described in table 1 above) in a twin screw extruder under the processing conditions listed in table 12 below to form adhesive pellets. Table 8 shows the composition in parts per hundred rubber. Table 9 shows the composition of the components in weight%. Table 10 shows the composition of rubber, TPE and filler in weight percent (where rubber, TPE and filler are based on the total weight of rubber, TPE and filler) and heat and UV stabilizers in parts per hundred (pph) rubber + TPE + filler. Table 11 shows the compositions in which all components are listed in weight%.

TABLE 8 adhesive compositions of examples 15-18

All in terms of PPHR (parts per hundred rubber)

TABLE 9 adhesive compositions of examples 15-18

Rubber and TPE in weight% based on the total weight of rubber + TPE; CaCO3, antioxidant and UV stabilizer in parts per 100 parts rubber + TPE

TABLE 10 adhesive compositions of examples 15-18

Rubber, TPE and filler in weight% based on the total weight of rubber, TPE and filler; heat and UV stabilizers in parts per hundred (pph) rubber + TPE + filler

TABLE 11 adhesive compositions of examples 15-18 (all in weight percent)

The process conditions used to prepare the adhesive compositions of examples 15-18 are provided in table 12 below.

TABLE 12 Process conditions for the adhesive compositions of examples 15-18

Examples	TSE RPM	Throughput (lb/hr)	Melt (F)
				15	200	119	380
16	200	117.2	380
				17	200	117.2	380
18	275	119	380

Various adhesive films were prepared using the adhesive compositions listed in tables 8-12 above. Information on the materials used in these adhesive films is provided in tables 13-16 below.

TABLE 13 adhesive film materials used in examples 19-22

Abbreviations	Description of the invention	Source
			Vector 4187	Bonding layer	TSRC Dexco corporation (TSRC Dexco)
Total 9458	HDPE	Darr company (Total)
			Marlex D143	LLDPE	Chevron Phillips company (Chevron Phillips)
Polyfil ABC 5000	LLDPE	Polyfil Co Ltd

Nine adhesive films were prepared on a nine-layer flat stack mold (LF-400 Coex 7-layer type, available from laboratory science Engineering). The air flow to the die was manually controlled to achieve a blow-up ratio of about 2: 1. The bubble was then collapsed about thirty (30) feet above the die, traversed across a roller, slit at the edge to produce two separate films, and then each of the films was wound onto a 6 inch core and rolled up. The feed was supplied from 9 separate (3/4 inch) 20mm diameter extruders (each a Labtech Scientific LE20-30/C HA single screw extruder).

Layers 1-9 were fed using pellets and master batch compound blends as known in the art. The process conditions and the formula are as follows:

the extruder diameters and temperatures and screen and adapter temperatures are shown in table 14 below.

TABLE 14 extruder diameters and temperatures and screen and adapter temperatures for the adhesive films of examples 19-22

The composition of each construction is described in table 15 below.

TABLE 15 adhesive films of examples 19-22

Layer thicknesses are shown in table 16 below:

TABLE 16 layer thicknesses of adhesive films of examples 19-22

The resulting adhesive films of examples 8-14, comparative examples D-F, and examples 19-22 were tested in various ways. The test methods used are described below.

Tack test

The tack of the adhesive layer or portion of the 7-layer adhesive film or the 9-layer adhesive film was measured according to ASTM D2979 using a TA-XT2i Texture Analyzer from Texture Technologies, Corp. The multilayer adhesive film was held in a brass fixture (part number a Tack Rig10, supplied by texture science) with the adhesive surface facing upward. A 7mm stainless steel probe was brought into contact with the adhesive layer of the multilayer film until 100 grams force was applied to the adhesive layer facing upward. After a contact time of one second, the probe was lifted at a rate of 0.5 mm per second, and the adhesion force related to the distance of the probe from the strip was measured. The tack (in grams) was then recorded as the peak removal force.

Adhesion test to adhesive surface

Laminating 7-or 9-layer adhesive film to BOPP (biaxially oriented polypropylene) pressure sensitive adhesive tape (usingHeavy duty shipping tape #3850, sold by 3M company (3M Co), to prevent the adhesive film from stretching during testing. Adhering the resulting construction to a test objectThe tested stickers. The various adherend substrates tested were: polypropylene (PP), Low Density Polyethylene (LDPE), High Density Polyethylene (HDPE), Polystyrene (PS), Polymethylmethacrylate (PMMA), Polyvinylchloride (PVC), Polycarbonate (PC), Polyethylene (PET), nylon 6, and glass. The resulting laminated samples were aged in a 120 ° f oven for 24 hours. After aging, the laminated samples were allowed to cool in a constant temperature (72 ° f) and constant humidity (50% RH) chamber for 24 hours and tested according to PSTC-101 test method a test method using an Instron with a peel angle of 180 ° and a chuck speed of 90 inches per minute.

T-Peel test

Laminating 7-or 9-layer adhesive film to a BOPP (biaxially oriented polypropylene) pressure sensitive adhesive tape (sold by 3M company)Heavy duty shipping tape #3850) to prevent the adhesive film from stretching during testing. The resulting sample pieces (adhesive film + BOPP) were cut 1 inch x 8 inches. The film is folded onto itself so that the adhesive layers are in contact with each other. Then, a hard rubber roller of 2kg was applied in one pass (one longitudinal and backward longitudinal) in each direction at a speed of 90 in/min. The resulting adhered multilayer stack was tested for T-peel using an Instron at a chuck speed of 12in/min according to ASTM D-1876.

Shipping (package pop open) test

By first selling it by 3M companyThe bubble liner mailer is cut into flat open sheets to prepare the packaging construction, with the protective polyethylene outer layer forming the first (outer) major surface and the bubble layer forming the second (inner) major surface. Layer 1 of the multilayer adhesive film was joined to the bubble layer of the sheet mailer by using 3M 9472LE permanent transfer adhesive sold by 3M company. The transfer adhesive is applied to 100% of the surface area of the bubble layer with no or minimal overlap. Obtaining a polyethylene outer layer, a bubble layer, an adhesive layer and a glueA layered construction of a multilayer construction. This construction was referred to as a laminate in this test.

The resulting laminate was cut into 6 inch by 11 inch sheets. The sheet is used to wrap a 3 inch by 2 inch cube (e.g., 5 cubes of 3 inch by 3 inch)Super Sticky note, 3M 654-5SSY, manufactured by 3M corporation). This is accomplished by placing a notepad over the adhesive portion of the laminate and wrapping the remaining laminate over the notepad so that the notepad is centered in one-half of the total laminate size. Thus, all sides of the notepad are covered by the laminate. Excess laminate (about 1 inch) was pressed together so that the adhesive portions directly adjacent to each other were bonded together. After wrapping, the wrapped package was allowed to stand at room temperature for 24 hours. For only examples 19-22, the wrapped package was placed in a 150 ° f environment for a 24 hour "waiting" period. The package is stretched open during the 24 hour wait, and a "fail" rating is obtained. All packages that did not pop open during the 24 hour wait were considered to "pass" the test.

The results of the above tests for the different examples and comparative examples are as follows:

table 17: results of tack, T-Peel and shipping tests for examples 8-14, comparative examples D-F and examples 19-22

TABLE 18 results of adhesion test to adhered surface

If there is no inconsistency in the usage of this document with any of the documents incorporated by reference, then the usage in this document shall prevail.

In this document, the terms "a" or "an" are used generically in the patent document to include one or more than one, independent of any other embodiment or use of the "at least one" or "one or more". In this document, unless otherwise indicated, the term "or" is used to mean nonexclusive, or such that "a or B" includes "a but not B," B but not a, "and" a and B. In this document, the terms "including" and "in which" are used as the plain-chinese equivalents of the respective terms "comprising" and "wherein". In addition, in the following claims, the terms "comprises" and "comprising" are to be interpreted broadly, i.e., a system, device, article, composition, formulation, or process that includes elements in addition to those elements recited in the claims after such terms are still considered to fall within the scope of the claims. Furthermore, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

The terms first, second, third and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

Furthermore, the terms top, bottom, over, under and the like in the description and the claims are used for descriptive purposes and not necessarily for describing relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other orientations than described or illustrated herein.

The recitation of all numerical ranges by endpoints is intended to include all numbers subsumed within that range (i.e. a range of 1 to 10 includes, for example, 1, 1.5, 3.33, and 10).

The above description is intended to be illustrative and not restrictive. For example, the above-described embodiments (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be used, such as by one of ordinary skill in the art in view of the above description. The abstract is provided to comply with 37c.f.r. § 1.72(b), to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Also, in the above detailed description, various features may be grouped together to simplify the disclosure. This should not be understood as an intention to imply that non-claimed features of the disclosure are essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that such embodiments may be combined with each other in various combinations or permutations. The scope of the disclosure may be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

It will be appreciated by those skilled in the art that many changes can be made to the details of the above-described embodiments and implementations without departing from the underlying principles of the disclosure. In addition, various modifications and alterations to this disclosure will be apparent to those skilled in the art without departing from the spirit and scope of this invention. Accordingly, the scope of the present application should be determined only by the following claims and their equivalents.