STRETCH RELEASING PRESSURE-SENSITIVE ADHESIVE ARTICLES AND METHODS OF USING THE SAME

• US 20080135159A1
• Filed: 12/12/2006
• Published: 06/12/2008
• Est. Priority Date: 12/12/2006
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Schmotter, Barbara K., Bries, James L., Sheridan, Margaret M.
• Application Number:
  US11/609,727
• Publication Number:
  US 20080135159A1
• Time in Patent Office: Days
• US Class Current: 156/160
• CPC Class Codes: B29C 65/4825 Pressure sensitive adhesives
• CPC Class Codes: B29C 65/483 Reactive adhesives, e.g. chemically curing adhesives
• CPC Class Codes: B29C 65/76 Making non-permanent or releasable joints
• CPC Class Codes: B29C 66/47 Joining single elements to sheets, plates or other substantially flat surfaces B29C66/5326 takes precedence
• CPC Class Codes: B29C 66/727 being porous, e.g. foam
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09J 2301/308 the adhesive tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive
• CPC Class Codes: C09J 2400/243 in the substrate
• CPC Class Codes: C09J 2453/00 Presence of block copolymer
• CPC Class Codes: C09J 5/00 Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
• CPC Class Codes: C09J 5/06 involving heating of the applied adhesive
• CPC Class Codes: C09J 7/26 Porous or cellular plastics
• CPC Class Codes: C09J 7/29 Laminated material metallised plastics C09J7/22
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/24992 Density or compression of components

Abstract

A stretch releasing pressure-sensitive adhesive article that includes a backing that includes a layer of foam having a density of from about 7 pounds per cubic foot to about 15 pounds per cubic foot, a caliper of from about 0.01 inch to less than 0.020 inch, a first major surface and a second major surface opposite the first major surface, a first pressure-sensitive adhesive composition disposed on the first major surface of the layer of foam and in direct contact with the layer of foam. The article exhibits at least about 40% surface contact to a standardized textured surface.

Claims

1. A stretch releasing pressure-sensitive adhesive article comprising:

a backing comprising a continuous layer of foam having a density of from about 7 pounds per cubic foot to about 15 pounds per cubic foot, a caliper of from about 0.01 inch to less than 0.020 inch, a first major surface and a second major surface opposite the first major surface;

a first layer of first pressure-sensitive adhesive composition disposed on the first major surface of the layer of foam and in direct contact with the foam; and

a nontacky tab,

the article exhibiting at least 40% surface contact when bonded to a standardized textured surface.

2. The article of claim 1 wherein the backing further comprises a polymer film bonded to the second major surface of the layer of foam.

3. The article of claim 1, further comprising a second layer of pressure-sensitive adhesive composition disposed on the second major surface.

4. The article of claim 2, further comprising a second layer of pressure-sensitive adhesive composition disposed on the polymer film.

5. The article of claim 3, further comprising a release liner disposed on the second layer of pressure-sensitive adhesive composition.

6. The article of claim 1, exhibiting a static shear to a standardized textured surface of at least 30,000 minutes.

7. The article of claim 1 exhibiting a static shear to a standardized textured surface of at least 60,000 minutes.

8. The article of claim 1, exhibiting a static shear to a plasticized vinyl substrate of at least 30,000 minutes.

9. The article of claim 1, exhibiting a static shear to a plasticized vinyl substrate of at least 50,000 minutes.

10. The article of claim 1, exhibiting at least 50% surface contact when bonded to a standardized textured surface.

11. The article of claim 1, exhibiting at least 60% surface contact when bonded to a standardized textured surface.

12. The article of claim 1, exhibiting at least 70% surface contact when bonded to a standardized textured surface.

13. The article of claim 1, exhibiting at least 60% surface contact when bonded to a standardized textured surface and a static shear of at least 30,000 minutes to a plasticized vinyl substrate.

14. The article of claim 1, wherein the foam backing has a density from about 7.5 pounds per cubic foot to no greater than 12.5 pounds per cubic foot.

15. The article of claim 1, wherein the foam backing has a density from 7.5 pounds per cubic foot to 8.5 pounds per cubic foot.

16. The article of claim 1, wherein the ratio of the load at break of the backing to the stretch debond force of the article is at least 1.5:

1.

17. The article of claim 1, wherein the ratio of the load at break of the backing to the stretch debond force of the article is at least 2:

1.

18. The article of claim 3 further comprising a first release liner disposed on the first layer of pressure-sensitive adhesive composition, and a second release liner disposed on the second layer of pressure-sensitive adhesive composition.

19. The article of claim 1, wherein the pressure-sensitive adhesive composition comprises a block copolymer comprising styrene and a copolymer derived from nitrogen and alkyl(methyl)acrylate.

20. A method of bonding a stretch releasing pressure-sensitive adhesive article to a surface, the method comprising:

contacting a surface with the first layer of pressure-sensitive adhesive composition of the article of claim 1, the backing of the article further comprising a first end, a second end opposite the first end and a longitudinal extent extending between the first end and the second end; and

applying pressure along at least a portion of the longitudinal extent of the backing.

21. The method of claim 20, wherein applying pressure comprises

positioning an edge of a rigid applicator tool near the first end of the backing, and

drawing the edge of the rigid applicator tool down the longitudinal extent of the backing toward the second end of the backing while maintaining contact between the rigid substrate and the backing and exerting a force against the backing sufficient to press the adhesive composition into intimate contact with the surface.

22. The method of claim 21, wherein the surface is a textured surface comprising features and the force exerted against the backing is sufficient to press the adhesive composition into intimate contact with the features.

23. The method of claim 21, wherein the surface exhibits a Ra value of at least 40 μ

m, a Rq value of at least 40 μ

m, and a Rz value of at least 300 μ

m over a 12.7 mm by 12.7 mm area of the surface.

24. The method of claim 20, wherein the surface comprises a textured, plasticized vinyl surface.

25. The method of claim 20 further comprising heating at least one of the pressure-sensitive adhesive composition and the surface prior to contacting the surface with the pressure-sensitive adhesive composition.

26. A method of bonding the stretch releasing pressure-sensitive adhesive article of claim 5 to a surface, the method comprising:

contacting the surface with the first layer of pressure-sensitive adhesive composition;

applying pressure to the article along at least a portion of a length of the article;

removing the release liner to expose the second layer of pressure-sensitive adhesive composition; and

contacting the second layer of pressure-sensitive adhesive composition with an object.

27. A method of bonding a stretch releasing pressure-sensitive adhesive article to a surface, the method comprising;

contacting the surface with a stretch releasing pressure-sensitive adhesive article comprising a pressure-sensitive adhesive composition, a first end, a second end and a longitudinal extent extending between the first end and the second end;

positioning a planar edge of a rigid applicator tool near the first end of the article; and

drawing the edge of the rigid applicator tool down the longitudinal extent of the article toward the second end of the article while maintaining contact between the edge of the rigid applicator tool and the article and exerting a force against the article sufficient to press the pressure-sensitive adhesive composition into intimate contact with the surface.

28. The method of claim 27, wherein the surface comprises the surface of a textured plasticized vinyl substrate and exhibits a Ra value of at least 40 μ

m, a Rq value of at least 40 μ

m, and a Rz value of at least 300 μ

m over a 12.7 mm by 12.7 mm area of the surface.

29. The method of claim 27 further comprising heating at least one of the pressure-sensitive adhesive composition and the surface prior to contacting the surface with the pressure-sensitive adhesive composition.

30. A stretch releasing pressure-sensitive adhesive article comprising:

a backing consisting of

a continuous layer of foam having a density of from about 7 pounds per cubic foot to about 15 pounds per cubic foot, a caliper of from about 0.01 inch to less than 0.020 inch, a first major surface and a second major surface opposite the first major surface, and

a first layer of film bonded to the first major surface of the layer of foam;

a first layer of first pressure-sensitive adhesive composition disposed on the second major surface of the layer of foam and in direct contact with the foam; and

a nontacky tab,

the first pressure-sensitive adhesive composition exhibiting at least 40% surface contact when bonded to a standardized textured surface.

31. The article of claim 30, wherein the first pressure-sensitive adhesive composition comprises a block copolymer comprising styrene and a copolymer derived from nitrogen and alkyl(methyl)acrylate.

32. A stretch releasing pressure-sensitive adhesive article comprising:

a backing comprising a continuous layer of foam, a first major surface and a second major surface opposite the first major surface;

a first layer of first pressure-sensitive adhesive composition disposed on the first major surface of the layer of foam and in direct contact with the foam; and

a nontacky tab,

the article exhibiting at least 40% surface contact when bonded to a standardized textured surface and a static shear to the standardized textured surface of at least 30,000 minutes.