Article comprising pressure-sensitive adhesive stripes

• US 10,023,768 B2
• Filed: 06/12/2014
• Issued: 07/17/2018
• Est. Priority Date: 06/24/2013
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Barrios, Carlos A., Bries, James L., Maier, Gary W., Rattray, Tyler J.
• Primary Examiner(s): Ducheneaux, Frank D
• Application Number:
  US14/901,271
• Publication Number:
  US 20160376471A1
• Time in Patent Office: 1,496 Days
• Field of Search: None
• CPC Class Codes: C09J 107/00 Adhesives based on natural rubber
• CPC Class Codes: C09J 125/16 Homopolymers or copolymers of alkyl-substituted styrenes
• CPC Class Codes: C09J 133/00 Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 133/04 Homopolymers or copolymers of esters C09J143/04 takes precedence
• CPC Class Codes: C09J 183/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• CPC Class Codes: C09J 183/10 Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09J151/08, C09J153/00
• CPC Class Codes: C09J 2301/21 the adhesive layer being formed by alternating adhesive areas of different nature
• CPC Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• 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 2407/00 Presence of natural rubber
• CPC Class Codes: C09J 2425/00 Presence of styrenic polymer
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2453/00 Presence of block copolymer
• CPC Class Codes: C09J 2483/00 Presence of polysiloxane
• CPC Class Codes: C09J 2483/005 in the release coating
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: C09J 7/383 Natural or synthetic rubber
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: C09J 7/387 Block-copolymers
• CPC Class Codes: C09J 7/401 characterised by the release coating composition
• CPC Class Codes: C09J 7/403 : characterised by the structure of the release feature

Abstract

An article including a release liner with an adhesive layer disposed thereon, the adhesive layer including a plurality of stripes of a first pressure-sensitive adhesive and of a second pressure-sensitive adhesive, arranged in a generally alternating pattern. The first pressure-sensitive adhesive is a silicone-based pressure-sensitive adhesive that includes a silicone block copolymer elastomer comprising hard segments that each comprise at least one polar moiety, and the second pressure-sensitive adhesive is an organic polymeric pressure-sensitive adhesive.

Claims

1. An article comprising:

a first release liner comprising a fluorosilicone release surface on at least a first major surface thereof;

a primary adhesive layer disposed on the first major surface of the release liner, wherein the primary adhesive layer comprises a plurality of stripes of a first pressure-sensitive adhesive and of a second pressure-sensitive adhesive, arranged in a generally alternating pattern along a longitudinal extent of the release liner;

wherein the first pressure-sensitive adhesive is a silicone-based pressure-sensitive adhesive that comprises a silicone block copolymer elastomer comprising hard segments that each comprise at least one polar moiety,

wherein the second pressure-sensitive adhesive is an organic polymeric pressure-sensitive adhesive,

wherein the first pressure-sensitive adhesive provides a volume fraction of the primary adhesive layer that is from greater than 11%, to about 80%;

and wherein the primary adhesive layer exhibits an Elevated Humidity/Static Shear Test result of >

30000 minutes.

2. The article of claim 1, wherein the silicone block copolymer elastomer is selected from the group consisting of urea-based silicone block copolymers, oxamide-based silicone block copolymers, amide-based silicone block copolymers, and urethane-based silicone block copolymers, and mixtures and blends thereof.

3. The article of claim 1, wherein the organic polymeric pressure-sensitive adhesive comprises an organic elastomer selected from the group consisting of styrenic block copolymer elastomers, natural rubber elastomers, (meth)acrylate elastomers, and mixtures and blends thereof.

4. The article of claim 1 wherein at least some of the stripes of the first pressure-sensitive adhesive each comprise a first major surface that is in contact with the fluorosilicone release surface of the first release liner and a second, oppositely-facing major surface that is adhesively bonded to a first major side of a tape backing.

5. The article of claim 1, wherein the tape backing is a highly extensible backing and wherein the tape backing and the primary adhesive layer collectively provide a length of stretch-releasable adhesive tape.

6. The article of claim 5, wherein the length of stretch-releasable adhesive tape comprises a long axis that is a stretch-release activation axis of the stretch-releasable adhesive tape and wherein at least selected stripes of the plurality of stripes each comprise a long axis that is oriented at least generally perpendicularly to the stretch-release activation axis of the stretch-releasable adhesive tape.

7. The article of claim 6, wherein the first major surfaces of at least the selected stripes are configured to be pressure-sensitive-adhesively bonded to a surface of a building component upon removal of the first release liner.

8. The article of claim 7, further comprising a secondary adhesive layer disposed on a second major side of the tape backing that is oppositely-facing from the first major side of the tape backing, wherein the tape backing and the primary and secondary adhesive layers collectively provide a double-faced stretch-releasable adhesive tape.

9. The article of claim 1, wherein at least selected pairs of adjacent stripes of the first pressure-sensitive adhesive and the second pressure-sensitive adhesive each comprise a gap between the first pressure-sensitive adhesive stripe of the pair and the second pressure-sensitive adhesive stripe of the pair, which gap comprises an exposed fluorosilicone release surface that is not in contact with any pressure-sensitive adhesive.

10. The article of claim 1, wherein at least selected pairs of adjacent stripes of the first pressure-sensitive adhesive and the second pressure-sensitive adhesive each comprise a minor surface of an edge of the first pressure-sensitive adhesive stripe of the pair that is in contact with a minor surface of an edge of the second pressure-sensitive adhesive stripe of the pair.

11. The article of claim 1, wherein at least selected pairs of adjacent stripes of the first pressure-sensitive adhesive and the second pressure-sensitive adhesive are each configured so that an edge portion of the first pressure-sensitive adhesive stripe of the pair comprises a first major surface that is in contact with the fluorosilicone release surface and so that the edge portion further comprises a second, generally oppositely-facing major surface that is in contact with a major surface of an edge portion of the second pressure-sensitive adhesive stripe of the pair, which edge portion of the first pressure-sensitive adhesive stripe inwardly underlies the edge portion of the second pressure-sensitive adhesive stripe.

12. The article of claim 11, wherein the first pressure-sensitive adhesive stripe comprises a central portion with a second major surface that faces generally opposite the first major surface of the first pressure-sensitive adhesive stripe, which second major surface of the central portion of the first pressure-sensitive adhesive stripe is not in contact with the second pressure-sensitive adhesive stripe.

13. The article of claim 1, wherein the first pressure-sensitive adhesive provides a release-liner-side area fraction on the first release liner-facing surface of the primary adhesive layer and provides an opposite-side area fraction on the surface of the primary adhesive layer that is opposite the first release liner, and wherein the primary adhesive layer exhibits a silicone surface-enrichment factor that is the ratio of the release-liner-side area fraction of the first pressure-sensitive adhesive to the opposite-side area fraction of the first pressure-sensitive adhesive, and wherein the silicone surface-enrichment ratio is at least about 1.2.

14. The article of claim 13, wherein the silicone surface-enrichment ratio is at least about 1.6.

15. The article of claim 1, wherein the first pressure-sensitive adhesive provides a volume fraction of the primary adhesive layer that is from about 13% to about 70%.

16. The article of claim 1, wherein the first pressure-sensitive adhesive provides a volume fraction of the primary adhesive layer that is from about 15% to about 60%.

17. The article of claim 1, wherein the first pressure-sensitive adhesive provides an overall area fraction, on a surface of the primary adhesive layer that is opposite the first release liner, of from greater than about 20%, to about 70%.

18. The article of claim 1, wherein the first pressure-sensitive adhesive provides an overall area fraction, on a surface of the primary adhesive layer that is opposite the first release liner, of from greater than about 20%, to about 60%.

19. The article of claim 1, wherein the primary adhesive layer comprises a gap area fraction of from about 20% to about 50%.