Use of a strip of an adhesive film for a re-releasable adhesive bond

• US 5,491,012 A
• Filed: 07/01/1993
• Issued: 02/13/1996
• Est. Priority Date: 07/11/1992
• Status: Expired due to Term

• Current Assignee: Tesa SE (Maxingvest AG)
• Original Assignee: Beiersdorf AG (Maxingvest AG)
• Inventors: Junghans, Andreas, Luhmann, Bernd
• Primary Examiner(s): Ahmad, Nasser
• Application Number:
  US08/087,622
• Time in Patent Office: 957 Days
• Field of Search: 428/40, 428/42, 428/41, 428/192, 428/194, 428/214, 428/323, 428/343, 428/346, 428/349, 428/347, 428/354, 428/355, 206/411
• US Class Current: 428/41.6
• CPC Class Codes: C09J 2301/18 characterized by perforations in the adhesive tape
• 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 2453/00 Presence of block copolymer
• CPC Class Codes: C09J 7/10 without carriers
• CPC Class Codes: Y10T 428/1467 Coloring agent
• 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 428/24959 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 428/2813 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 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2852 Adhesive compositions

Abstract

Use of a strip of an adhesive film for a re-releasable adhesive bond based on thermoplastic elastomer and tackifying resins, the adhesive film having high elasticity and low plasticity and the adhesion being lower than the cohesion, the adhesive strength largely disappearing during extension of the film, the ratio of peel strength to tear strength being at least 1:1.5, and an adhesive bond produced therewith being releasable by pulling on the adhesive film in the direction of the plane of adhesion, one end of the strip being provided on both sides with a UV-opaque covering which at the same time serves as a tab for pulling.

Claims

1. A strip of adhesive film for a releasable adhesive bond consisting of thermoplastic elastomer and tackifying resins of a composition to be self-adhesive, the adhesive film being elastic and non-plastic and the adhesion being lower than the cohesion, the adhesive strength disappearing during extension of the film, the ratio of peel strength to tear strength being at least 1:

1.5, and an adhesive bond produced therewith being releasable by pulling on the adhesive film in the direction of the plane of adhesion, the strip having two ends of which one is provided with a UV-opaque covering which at the same time serves as a tab of about 8 to 25 mm in length for pulling, the UV-opaque covering being dimensionally stable and comprising a UV-opaque plastic film laminated both sides of the adhesive film, the strip having adhesive exposed on both surfaces with the pulling tab adjacent one end.

2. A strip of an adhesive film according to claim 1, containing at least one of antioxidants, UV stabilisers, colourants and fillers.

3. A strip of an adhesive film according to claim 1, having a thickness of 0.2 mm to 1.2 mm.

4. A strip of an adhesive film according to claim 1, where the ratio of the peel strength to the tear strength is 1:

1.5 to 1;

5.

5. A strip of an adhesive film according to claim 1, where raw materials mixture has been kneaded at elevated temperature and extruded.

6. An article releasably adhesively bonded by a strip according to claim 1.