Shrinkable label film, a shrinkable label and a method for providing a shrinkable film and a label
AssigneeUpm Raflatac Oy
InventorsNoel Mitchell, Klaudia Majewska
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Abstract
The invention relates to a shrink face film and a shrink label comprising said face film. According to an embodiment the shrink face film includes a core layer comprising propylene random copolymer(s) and a modifier which is at least one of the following: olefinic plastomer, olefinic elastomer and ethylene-octene block copolymer. The invention further relates to a method for providing a shrink face film and a method for labelling of an item with a shrink label comprising said face film.
Claims12
A shrink face film for a label capable to shrink under exposure to external energy, the face film comprising a first skin layer, a second skin layer and a core layer in between the first skin layer and the second skin layer, wherein
- the core layer consists of between 50 and 70 wt. % of propylene random copolymer(s) of propylene-ethylene or propylene-butylene, and total amount between 30 and 50 wt. % of a modifier which is ethylene-octene block copolymer or at least one of ethylene/octene elastomer and ethylene/butene elastomer.
A method for manufacturing a shrink face film,
- providing a multilayer face film comprising a first skin layer, a second skin layer and a core layer in between the skin layers, wherein the core layer consists of between 50 and 70 wt. % of propylene random copolymer(s) of propylene-ethylene or propylene-butylene, and total amount between 30 and 50 wt. % of a modifier which is ethylene-octene block copolymer or at least one of ethylene/octene elastomer and ethylene/butene elastomer;
- stretching of the multilayer face film uniaxially at temperature between 50 and 130° C. so as to provide an uniaxially oriented multilayer face film;
- cooling the uniaxially oriented multilayer face film so as to provide shrink potential for the face film in the stretching direction.
Dependencies are inferred from the claim text.