Repeated use of an adhesive-film laminate

• US 6,841,241 B2
• Filed: 04/15/2002
• Issued: 01/11/2005
• Est. Priority Date: 08/29/1995
• Status: Expired due to Term

• Current Assignee: Tesa SE (Maxingvest AG)
• Original Assignee: Tesa AG (Maxingvest AG)
• Inventors: Lühmann, Bernd, Zöllner, Stephan, Harder, Christian, Storbeck, Reinhard
• Primary Examiner(s): PIERCE, JEREMY R
• Assistant Examiner(s): Pratt, Christopher C
• Application Number:
  US10/122,528
• Publication Number:
  US 20020168516A1
• Time in Patent Office: 1,002 Days
• Field of Search: 428/343, 428/346, 428/347, 428/349
• US Class Current: 428/343
• 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 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: Y10T 156/1116 Using specified organic delamination solvent
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2813 Heat or solvent activated or sealable
• CPC Class Codes: Y10T 428/2817 Heat sealable
• CPC Class Codes: Y10T 428/2826 Synthetic resin or polymer
• CPC Class Codes: Y10T 428/2839 with release or antistick coating

Abstract

Repeated use of an adhesive-film laminate for bonds which can be redetached without residue by pulling on the laminate in the direction of the bond plane, the laminate employed comprising

• • a) an elastic support with a resilience of at least 50%
  • b) coated on at least one side with a solvent or hot-melt pressure-sensitive acrylate adhesive or dispersion pressure-sensitive acrylate adhesive.

Claims

1. An adhesive film laminate capable of producing a first adhesive bond on a surface and being released from said surface without residue by pulling on the adhesive film laminate in the direction of the plane of bond produced between said adhesive film laminate and said surface, and thereafter being reused to produce a second adhesive bond on said surface or other surface and being released from said surface or other surface by pulling on the adhesive him laminate in the direction of the plane of bond produced between said adhesive film laminate and said surface or other surface, said adhesive film laminate comprising:

a) an elastic support exhibiting a resilience of at least 80%; and

b) a solvent or hot-melt pressure-sensitive acrylate adhesive or dispersion pressure-sensitive adhesive coated on at least one side of said elastic support.

2. The adhesive film laminate according to claim 1, wherein the pressure-sensitive acrylate adhesive has a uniform crosslinking profile.

3. The adhesive film laminate according to claim 1, wherein the elastic support is coated on both sides with pressure-sensitive acrylate adhesive.

4. The adhesive film laminate according to claim 1, wherein the elastic support has an adhesion-promoting finish.

5. The adhesive film laminate according to claim 1, wherein the elastic support comprises an elastomer, said elastomer optionally being in the form of a polymer blend and optionally being crosslinked.

6. The adhesive film laminate according to claim 1, wherein the pressure-sensitive acrylate adhesive is based on an acrylate copolymer, which acrylate copolymer is optionally in the form of a compound with resins, other acrylate copolymers, polymeric blood components and/or additives.

7. The adhesive film laminate according to claim 6, wherein the acrylate copolymer comprises acrylic esters and acrylic acid.

8. The adhesive film laminate according to claim 7, wherein the acrylate copolymer comprises one or more acrylic esters selected from the group consisting of 2-ethylhexyl acrylate, butyl acrylate, N-tert-butylacrylamide, isooctyl acrylate and glycidyl methacrylate.

9. The adhesive film laminate according to claim 1, wherein the elastic support has a thickness of 50-1000 μ

m, the pressure-sensitive adhesive on one or both sides has a thickness in each case of 25-800 μ

m, and the adhesive film laminate has an overall thickness of 75-2600 μ

m.

10. The adhesive film laminate according to claim 9, which is water-clear/transparent.

11. The adhesive film laminate according to claim 1, which is dyed, pigmented, filled or water-clear/transparent.