US 5,853,876 A · Biodegradable adhesive tape and biodegradable adhesive label

Abstract

An adhesive tape or an adhesive label each of which comprises a substrate including a biodegradable polymer layer and an adhesive layer provided on at least one surface of the substrate. The adhesive tape has a release agent layer formed on an opposite surface to the surface where the adhesive layer is provided, or has a release tape which is in contact with the adhesive layer, and the adhesive tape was wound up around a core for storage. The adhesive label has a release sheet which is in contact with the adhesive layer. In such biodegradable adhesive tape and biodegradable adhesive label, a biodegradable polymer is used as a material of the substrate, and therefore the tape and label do not disrupt the natural environment or do not largely disorganize the ecosystem in the soil even when discarded in the soil after use.

Claims5

Dependent claims

A biodegradable adhesive tape comprising:

an adhesive tape substrate which comprises a biodegradable polymer layer formed from at least one member selected from the group consisting of (i) a linear polyester of 3-hydroxybutyric acid and 3-hydroxyvaleric acid and (ii) a polymer alloy of starch and denatured polyvinyl alcohol;
a release agent layer formed on one surface of said substrate;
and
an adhesive layer formed on the other surface of said substrate, wherein said adhesive layer comprises a mixture of a natural rubber and at least one tackifier resin selected from the group consisting of rosin, derivatives of rosin, terpene and derivatives of terpene.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

08/834,234Filed 15 Apr 1997 · continuation

Priority

JP 5-18647228 Jul 1993

Granted

29 Dec 1998

Term ends

Not estimatedThe source records don’t support an estimate.

Classification40 codes

B32B 7/06
Interconnection of layers: permitting easy separation
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 15/08
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/10
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of paper or cardboard

Biodegradable adhesive tape and biodegradable adhesive label

Life of this patent

Biodegradable adhesive tape and biodegradable adhesive label

Life of this patent

Abstract

Claims5