US 5,989,708 AGranted

Removable adhesive tape

Assignee3M Innovative Properties Company

InventorKarl W. Kreckel

Life of this patent

Estimating the term…

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Abstract

A removable adhesive tape comprising a highly extensible and substantially inelastic backing and a layer of pressure-sensitive adhesive. The backing has a high tensile strength, has a lengthwise elongation at break of at least about 150% with less than about 50% elastic recovery after stretching. The adhesive can be a normally tacky and pressure-sensitive adhesive and is coated on at least one surface of the film backing. The adhesive is preferably highly extensible, does not separate from the backing during stretching, and has higher cohesion than adhesion to any suitable substrate. After being applied to a substrate, the adhesive tape of the present invention becomes firmly bonded, but can be easily removed without damaging the substrate by simply stretching it in a direction substantially parallel, i.e., less than about 35.degree., to the surface of the substrate.

Claims7

Dependent claims

A hook assembly adapted to be releasably adhered to a surface of a substrate, said hook assembly comprising

a support portion having opposite first and second major surfaces;
a hook portion having a proximal end attached to said support portion along said second major surface, and a distal end spaced away from said second major surface;
and
a tape having first and second adhesive surfaces, said second adhesive surface being adhered along said first major surface of said support portion and said first adhesive surface being adapted to be adhered to the surface of the substrate, said tape being highly extensible and said hook assembly being removable from the surface of the substrate to which the assembly is adhered by stretching said tape to at least about 150% of its initial length at an angle no greater than about 35.degree. from the first surface of said support portion, and said tape including a tab portion projecting past the first major surface of said support portion and adapted for manual engagement to afford manual stretching of said tape.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/835,547Filed 8 Apr 1997 · continuation
Priority: 20 Dec 1990
Granted: 23 Nov 1999
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A47G 1/175
Using adhesives, suction or magnetism: stretch releasing adhesives
C09J 7/24
Plastics; Metallised plastics: based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
C09J 2301/308
Characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier: the adhesive tape or sheet losing adhesive…
Y10T 156/1147
Changing dimension during delaminating [e.g., crushing, expanding, warping, etc.]: using shrinking or swelling agent during delaminating

Family

Serial632,173Parent of this continuation-in-part · filed 20 Dec 1990
Serial802,061Parent of this continuation · filed 10 Dec 1991
Serial061,637Parent of this continuation · filed 12 May 1993
Serial259,747Parent of this division · filed 6 Jun 1994
Serial467,359Parent of this continuation · filed 6 Jun 1995
US 5,516,581 AParent of this division
US 5,989,708 AThis patent

From the US filing history. Foreign family members aren’t listed.