Shrink labels
AssigneeUpm Raflatac Oy
InventorsNoel MITCHELL, Klaudia KORMAN, Markus KIVELÄ
Life of this patent
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Abstract
The invention relates to a shrink label. According to an embodiment the shrink label comprises an uniaxially oriented multilayer face film comprising skin layers including polyethylene polymer(s) and at least two cyclic polymers comprising different glass transition temperatures between 30 and 100° C. and the difference between the glass transition temperatures being between 5 and 60° C., and wherein the multilayer face film is seamed by a solvent. The invention further relates to a method for providing a shrink label, use of the shrink label, method for providing a shrink label and method for labelling.
Claims18
A shrink label capable to shrink under exposure to external energy, the shrink label comprising:
- an uniaxially oriented multilayer face film including a first skin layer forming an uppermost layer of the face film and a second skin layer forming an undermost layer of the face film, wherein said skin layers comprise:
- at least one of the following polyethylene polymers:
- low density polyethylene, medium density polyethylene and linear low density polyethylene;
- at least two cyclic polymers, wherein the at least two cyclic polymers comprise cyclic olefin copolymer, cyclic block copolymer, cyclic olefin polymer, or any combination thereof,
- and wherein the at least two cyclic polymers comprise different glass transition temperatures between 30 and 100° C. and the difference between the glass transition temperatures is between 5 and 60° C.;
- and wherein the multilayer face film is turned over itself so that opposite edges of the multilayer face film are overlapping and forming an area wherein the first skin layer and the second skin layer are adjacent to each other and bonded together by a solvent so as to form a seam for the shrink label.
A combination of a shrink label and an item, wherein the shrink label comprises:
- an uniaxially oriented multilayer face film including a first skin layer forming an uppermost layer of the face film and a second skin layer forming an undermost layer of the face film, wherein said skin layers comprise:
- at least one of the following polyethylene polymers:
- low density polyethylene, medium density polyethylene and linear low density polyethylene;
- at least two cyclic polymers, wherein the at least two cyclic polymers comprises cyclic olefin copolymer, cyclic block copolymer, cyclic olefin polymer, or any combination thereof,
- and wherein the at least two cyclic polymers comprise different glass transition temperatures between 30 and 100° C. and the difference between the glass transition temperatures is between 5 and 60° C.;
- and wherein the multilayer face film is turned over itself so that opposite edges of the multilayer face film are overlapping and forming an area wherein the first skin layer and the second skin layer are adjacent to each other are bonded together by a solvent so as to form a seam for the shrink label.
A method for manufacturing a shrink label, the method comprising:
- providing a multilayer face film comprising a first skin layer and a second skin layer, wherein said skin layers comprise at least one of the following polyethylene polymers:
- low density polyethylene, medium density polyethylene and linear low density polyethylene;
- and at least two cyclic polymers, wherein the at least two cyclic polymers comprises cyclic olefin copolymer, cyclic block copolymer, cyclic olefin polymer, or any combination thereof,
- and wherein the at least two cyclic polymers comprise different glass transition temperatures between 30 and 100° C. and the difference between the glass transition temperatures is between 5 and 60° C.;
- stretching the multilayer face film uniaxially so as to provide uniaxially oriented multilayer face film;
- cooling the uniaxially oriented multilayer face film so as to provide shrink potential in the uniaxial stretching direction;
- applying a solvent to an edge area of the first skin layer or the second skin layer;
- folding the multilayer face film onto itself so that opposite edges of the multilayer face film are overlapping and forming an area wherein the first skin layer and the second skin layer are adjacent to each other;
- bonding the area wherein the first skin layer and the second skin layer are adjacent to each other together with the solvent so as to form a seam.
Dependencies are inferred from the claim text.