Slip-cling stretch film
AssigneeBerry Plastics Corporation
InventorAlexander Tukachinksy
Life of this patent
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Abstract
A multilayer stretch film having a high slip surface and an aggressive cling surface for wrapping items or loads for ease of transport is disclosed. In one embodiment, there is disclosed a multilayer film comprises a first surface having a coefficient of friction at least less than about 0.9, comprising at least polypropylene and high-density polyethylene, a second surface having a cling force to the first surface at least greater than about 5 g/in, comprising at least a styrenic block copolymer, and a core layer, positioned between the first surface and the second surface, comprising at least linear low-density polyethylene or its blend.
Claims25
A multilayer stretch film comprising:
- a slip layer comprising at least polypropylene and high-density polyethylene blend;
- a cling layer comprising at least a styrene block copolymer material;
- and
- an intermediary layer comprising at least linear low-density polyethylene resin or its blend;
- wherein the cling layer comprises 60-100% styrene block copolymer material.
A multilayer stretch film comprising:
- a first surface layer having a coefficient of friction at least less than about 0.9, comprising at least polypropylene and high-density polyethylene;
- a second surface layer having a cling force to the first surface layer at least greater than about 5 g/in, comprising at least a styrenic block copolymer;
- and
- a core layer, positioned between the first surface layer and the second surface layer, comprising at least linear low-density polyethylene resin;
- wherein the second surface layer comprises 60-100% styrene block copolymer material.
Dependencies are inferred from the claim text.