Use of a strip of adhesive film

• US 5,925,459 A
• Filed: 07/01/1997
• Issued: 07/20/1999
• Est. Priority Date: 07/06/1996
• Status: Expired due to Term

• Current Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Original Assignee: Beiersdorf AG (maxingvest GmbH & Co. KGaA)
• Inventors: Luhmann, Bernd, Zimmermann, Dieter
• Primary Examiner(s): MERRIAM, ANDREW EDWIN
• Application Number:
  US08/886,307
• Time in Patent Office: 749 Days
• Field of Search: 428/192, 428/194, 428/354, 428/355 RA, 524/271, 524/274, 524/525
• US Class Current: 428/354
• 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 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24793 Comprising discontinuous or differential impregnation or bond
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2861 having readily strippable combined with readily readhearable properties [e.g., stick-ons, etc.]

Abstract

Use of a transparent grip tab for a strip of adhesive film for a temporary bond based on thermoplastic rubber and tackifier resins, where the adhesive film is of high elasticity and low plasticity and where the adhesion is lower than the cohesion, the adhesion largely disappears when the film is extended, the ratio of peel force to tear load is at least 1:1.5, and where an adhesive bond produced therewith can be detached by pulling on the adhesive film in the direction of the bond plane.

Claims

1. An adhesive film strip useful for forming a temporary adhesive bond, said adhesive film strip being composed of an adhesive film composition comprising thermoplastic rubber and tackifying resins, and comprising a transparent grip tab protruding from an end thereof, wherein said adhesive film strip is of high elasticity and low plasticity, exhibits an adhesion that is lower than its cohesion, which adhesion largely disappears when the adhesive film strip is extended, and exhibits a ratio of tear load to peel force of at least 1.5:

1, and wherein an adhesive bond produced with said adhesive film strip can be detached by pulling on the grip tab in the direction of the plane of said adhesive bond.

2. An adhesive film strip according to claim 1, wherein the composition is formulated to be self-adhesive.

3. An adhesive film strip according to claim 1, wherein the composition comprises a heat-activated adhesive.

4. An adhesive film strip according to claim 1, wherein the composition comprises antioxidants, UV stabilizers, colorants, fillers and/or auxiliaries.

5. An adhesive film strip according to claim 1, which has a thickness of from 0.2 mm to 1.2 mm.

6. An adhesive film strip according to claim 1, which exhibits a ratio of tear load to peel force of from 1.5:

1 to 5;

1.

7. An adhesive film strip according to claim 1, wherein the transparent grip tab consists of an elastic polymer film which, except for a region where the transparent grip tab is intended to be gripped, is coated on both sides with the adhesive film composition.

8. An adhesive film strip according to claim 7, wherein the elastic polymer film extends throughout the entire adhesive film strip.

9. A method of forming a temporary bond on a substrate comprising forming an adhesive bond between an adhesive film strip according to any one of claims 1-8 and said substrate, and, when it is desired to break said adhesive bond, gripping the transparent grip tab of said adhesive film strip and pulling on said transparent grip tab in the direction of the plane of said adhesive bond.