Adhesive film strip

• US 5,626,932 A
• Filed: 08/16/1995
• Issued: 05/06/1997
• Est. Priority Date: 09/08/1994
• Status: Expired due to Term

• Current Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Original Assignee: Beiersdorf AG (maxingvest GmbH & Co. KGaA)
• Inventors: L uhmann, Bernd, Junghans, Andreas
• Primary Examiner(s): Ahmad, Nasser
• Application Number:
  US08/515,886
• Time in Patent Office: 629 Days
• Field of Search: 428/40, 428/41, 428/42, 428/192, 428/194, 428/201, 428/202, 428/212, 428/214, 428/354, 428/356, 428/323, 206/411
• US Class Current: 428/40.1
• CPC Class Codes: C09J 153/02 Vinyl aromatic monomers and conjugated dienes
• 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 7/387 Block-copolymers
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1471 Protective layer
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/2486 with outer strippable or release layer
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24959 of adhesive layers
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2857 including metal or compound thereof or natural rubber

Abstract

Strip of an adhesive film for a bond which can be redetached without residue, based on thermoplastic rubber and tackifying resins, the adhesive film possessing high elasticity and low plasticity and the adhesion being less than the cohesion, the adhesion disappearing when the film is extended, the ratio of pulling force to tearing load being at least 1:1.5, and an adhesive bond produced therewith being able to be separated by pulling on the adhesive film in the direction of the bonding plane, one end of the strip being provided on both sides with a covering which is adhesive on the side facing the adhesive film and which serves at the same time as a grip tab for pulling.

Claims

1. Strip of an adhesive film for a bond which can be redetached without residue, based on thermoplastic rubber and tackifying resins, the adhesive film possessing high elasticity and low plasticity and the adhesion being less than the cohesion, the adhesion disappearing when the film is extended, the ratio of pulling force to tearing load being at least 1:

1.5, and an adhesive bond produced therewith being able to be separated by pulling on the adhesive film in the direction of the bonding plane, one end of the strip being provided on both sides with a covering which is adhesive on the side facing the adhesive film and which serves at the same time as a grip tab for pulling, the release force of the covering film being less than 3N/cm.

2. Strip according to claim 1, the covering being a release-coated film or a release-coated paper.

3. Strip according to claim 1, the covering being UV-impermeable.

4. Strip according to claim 1, in which the composition is formulated to be self-adhesive.

5. Strip according to claim 1, the composition comprising antioxidants, UV stabilizers, colorants, fillers and conventional auxiliaries.

6. Strip according to claim 1, having a thickness from 0.2 mm to 1.2 mm.

7. Strip according to claim 1, the ratio of pulling force to tearing load being from 1:

1.5 to 1;

5.

8. Strip according to claim 1, wherein the thermoplastic rubber and tackifying resins are hot kneaded and extended to form the adhesive portion of said film.

9. In combination, a substrate, an article, and an adhesive film according to claim 1 bonding the article to said substrate so that it can be redetachably bonded to the substrate without leaving a residue, the grip tab of the film being optically covered by a removable cover.