Redetachable, self-adhesive hook

• US 5,409,189 A
• Filed: 09/14/1993
• Issued: 04/25/1995
• Est. Priority Date: 09/30/1992
• Status: Expired due to Term

• Current Assignee: Tesa SE (maxingvest GmbH & Co. KGaA)
• Original Assignee: Beiersdorf AG (maxingvest GmbH & Co. KGaA)
• Inventors: Luhmann, Bernd
• Primary Examiner(s): Ramirez, Ramon O.
• Assistant Examiner(s): CHAN, KO HUNG
• Application Number:
  US08/122,823
• Time in Patent Office: 588 Days
• Field of Search: 248/205.3, 248/304, 248/301, 156/313, 428/43, 428/41
• US Class Current: 248/205.3
• CPC Class Codes: A47G 1/175 Stretch releasing adhesives
• 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 2301/502 process for debonding adherents
• CPC Class Codes: C09J 2421/00 Presence of unspecified rubber
• CPC Class Codes: C09J 5/00 Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
• CPC Class Codes: C09J 7/10 without carriers
• CPC Class Codes: Y10T 428/15 Sheet, web, or layer weakened to permit separation through thickness
• CPC Class Codes: Y10T 428/24017 Hook or barb

Abstract

Redetachable, self-adhesive hook or similar fixing device, characterized by a strip (1) of an adhesive film for reseparable bonding based on a thermoplastic rubber and tackifying resins, wherein the adhesive film has high elasticity and low plasticity and wherein the adhesion is lower than the cohesion, the adhesive power largely disappears on extension of the film, the ratio of the peel strength to the tear load is at least 1:1.5, and wherein an adhesive bond produced with this can be separated by pulling on the adhesive film in the direction of the adhesion plane, wherein one end of the strip (1) is provided on both sides with a covering (4), which at the same time serves as a tab for pulling, wherein at least the covering (4) located on the front side is opaque to UV and wherein the front side of the strip (1) carries, except for in the region of the covering (4), a baseplate (3) having a peg-shaped extension (2) pointing forwards, and the reverse of the strip (1) is covered with a release paper or a release film (5) which has a tab (6) in the region of the covering (4).

Claims

1. A detachable self-adhesive assembly comprising in combination

a) A baseplate (3) having a front and back with a peg-like extension (2) on the front,

b) a strip (1) having an adhesive front and back for mounting onto a surface, and said strip being of an adhesive composition based on a thermoplastic rubber and tackifying resins, the strip having high elasticity and low plasticity and exhibiting adhesion or adhesive power lower than cohesion of said strip, whereby said adhesive power substantially weakens upon elongation of said strip, the ratio of the strip peel strength to the strip tear strength being at least 1:

1.5, the front of the strip adhering to the back of the baseplate,

c) a covering (4) provided on a portion of the front and back of said strip so as to form a pulling tab to facilitate removal of said strip from said surface,

d) a release layer (5) adhered on the back of said strip (1), said layer having a tab (6) adjacent said covering (4),

whereby said release layer (5) can be removed so that the rear of said strip (1) can be affixed to a surface and, said strip can be detached from said surface upon pulling of said covering (4) so that said strip (1) elongates causing the strip to weaken said adhesive power to said surface, and resulting in the hook assembly being detached from said surface.

2. An assembly according to claim 1, wherein the baseplate (1) and the peg-like extension (2) are formed of plastic or metal.

3. An assembly according to claim 1, wherein the strip (1) contains at least one of an antioxidant, UV stabilizer, dye or filler.

4. An assembly according to claim 1, wherein the strip (1) is about 0.2 to 1.2 mm thick.

5. An assembly according to claim 1, wherein the ratio of the peel strength to the tear strength for the strip (1) is from about 1:

1.5 to 1;

5.

6. An assembly according to claim 1, wherein the strip (1) is formed of a composition which was hot kneaded and extruded.

7. An assembly according to claim 1, wherein the tab formed by the covering (4) is about 25 mm long and about 10 to 40 mm wide.

8. An assembly according to claim 1, wherein the covering (4) comprises a lacquered or pigmented plastic film.

9. An assembly according to claim 1, wherein the tab formed by the covering (4) is about 25 mm long and about 18 to 20 mm wide.

10. An assembly according to claim 1, wherein the covering (4) comprises a lacquered or pigmented plastic film of a different color than the baseplate (3).