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US 2015/0255008 A1Published application
Removable Adhesive Label Containing Polymeric Film Layer Having Water Affinity
AssigneeAvery Dennison Corporation
InventorKevin O. HENDERSON
Life of this patent
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Abstract
An adhesive label includes a polymeric first film layer that has an affinity for water. The label is useful in various labeling applications and especially adhesive labeling of reusable and recyclable containers which require removal of the label during a washing process in a warm or hot washing fluid.
Claims31
A label, comprising:
- (a) a film having a first surface and a second surface and comprising a first film layer, the first film exhibiting a change in dimension in its water-absorbed state;
- and
- (b) a pressure sensitive adhesive layer having a first surface and a second surface and comprising an adhesive wherein the first surface of the adhesive layer is adhered to the second surface of the film, the adhesive layer having an adhesive force between the second surface of the adhesive layer and an outer surface of a container when the second surface of the adhesive layer is adhered to the outer surface of the container;
- wherein the dimensional change of the first film layer in its water-absorbed state exhibits a detaching force that is greater than the adhesive force when the container is immersed in a washing fluid having a temperature of about 80° C. for a period of about 3 minutes;
- wherein the first film layer comprises at least one thermoplastic polymer having a glass transition temperature in the range of 35 to 105° C.,
- wherein the first film layer has a water absorption (ASTM D570) of at least 1.7% by weight after immersion in water at a temperature of about 80° C. for at least about 2 hours;
- wherein the first film layer has an absolute areal dimensional change (ASTM D1204) of at least about 4% after immersion in water having a temperature of about 80° C. for a period of about 3 minutes;
- and
- wherein the pressure sensitive adhesive exhibits at east one of a decrease in adhesion strength at temperatures above a room or ambient temperature and a decrease in adhesion strength on contact with a warm or hot washing fluid.
6 more elements
The label of claim 30 wherein the aromatic polyamide is derived from an aliphatic dicarboxylic acid or acid halide and an aromatic diamine.
A label, comprising:
- (a) a first film having a first surface and a second surface and comprising a first film layer, the first film exhibiting a change in dimension in its water-absorbed state, the first film layer comprising at least one thermoplastic polymer having a glass transition temperature in the range of 35 to 105° C.;
- and
- (b) a second film having a first surface and a second surface and comprising a second film layer, the second film exhibiting a change in dimension in its water-absorbed state, the second film layer comprising at least one thermoplastic polymer having a glass transition temperature in the range of 35 to 105° C.;
- (c) a pressure sensitive adhesive layer having a first surface and a second surface wherein the first surface of the adhesive layer is adhered to the second surface of the first film;
- the adhesive layer having an adhesive force between the second surface of the adhesive layer and an outer surface of a container when the second surface of the adhesive layer is adhered to the outer surface of the container;
- wherein the dimensional change of the first film layer in its water-absorbed state exhibits a detaching force that is greater than the adhesive force when the container is immersed in a washing fluid having a temperature of about 80° C. for a period of about 3 minutes;
- (d) wherein the first film layer exhibits at least one of
- (i) a water absorption (ASTM D570) of at least 1.7% by weight alter immersion in water at a temperature of about 80° C. for at least about 2 hours and
- (ii) an absolute area dimensional change (ASTM D1204) of at least about 4% after immersion in water having a temperature of around 80° C. for a period of about 3 minutes;
- (e) wherein the second film layer exhibits at least one of
- (i) a water absorption (ASTM D570) of at least 1.7% by weight after immersion in water at a temperature of about 80° C. for at least about 2 hours and
- (ii) an absolute dimensional change (ASTM D1204) of at least about 4% after immersion in water having a temperature of around 80° C. for a period of about 3 minutes;
- wherein the pressure sensitive adhesive exhibits at least one of a decrease in adhesion strength at temperatures above a room or ambient temperature and a decrease in adhesion strength on contact with a warm or hot washing fluid;
- and
- wherein the first and second film layers are nonoriented.
12 more elements
(canceled)
The label of claim 30, wherein the aromatic polyamide contains repeating aromatic groups and repeating aliphatic groups.
Dependencies are inferred from the claim text.