Face film and an adhesive label comprising the face film
AssigneeUpm Raflatac Oy
InventorsNoel Mitchell, Klaudia Majewska
Life of this patent
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Abstract
A wash-off label includes a face film. According to an embodiment the face film is at least uniaxially oriented and comprises at least one of the polyolefins: cyclic olefin copolymer, propylene terpolymer, propylene random copolymer, propylene homopolymer, heterophasic polypropylene and linear low density polyethylene. The face film has density between 0.85 and 0.94 g/cm3 at room temperature (23±2° C.). Further the invention relates to a labelled item comprising the wash-off label.
Claims18
A wash-off label consisting of a face film and an adhesive layer comprising pressure sensitive adhesive for adhering the label to the surface of an item to be labelled, wherein the face film is at least uniaxially oriented having an orientation direction, and wherein the face film comprises at least one of the following polyolefins:
- cyclic olefin copolymer, propylene terpolymer, propylene random copolymer, propylene homopolymer, heterophasic polypropylene and linear low density polyethylene,
- and wherein the face film has density between 0.85 and 0.94 g/cm3 at room temperature (23±2° C.);
- wherein the face film has a multilayer structure comprising layers in the following order:
- a first skin layer, a core layer and a second skin layer;
- wherein the core layer comprises at least one of the following polyolefins:
- propylene homopolymer, propylene terpolymer, heterophasic polypropylene and propylene random copolymer;
- and at least one of the following modifiers:
- propylene/ethylene plastomer, propylene/butene plastomer, polyolefin elastomer, ethylene butyl acrylate and ethylene-octene olefin block copolymer;
- wherein the face film is transparent and has a haze of 2-6% when tested according to ASTM D1003;
- wherein the face film exhibits less than 10% shrinkage at 60° C. in the orientation direction of the face film;
- wherein the face film exhibits no more than 50% of the maximum shrink force at a temperature of 50° C.;
- and
- wherein the face film exhibits a maximum shrink force of at least 0.83 N for a defined surface area of 0.6 mm2 (+/−10%) at 70° C., when measured according to standard ISO 14616 in the orientation direction of the face film.
Dependencies are inferred from the claim text.