Slip-cling stretch film
AssigneeBerry Plastics Corporation
InventorAlexander Tukachinsky
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.
Claims38
1-28. (canceled)
A multilayer film comprising
- a slip layer comprising at least a polypropylene copolymer and high-density polyethylene blend,
- a cling layer comprising at least a styrenic block copolymer and a polyethylene resin, and
- an intermediary layer comprising one layer or a plurality of individual layers,
- wherein at least one layer of the intermediary layer comprises linear low-density polyethylene resin or its blend and
- wherein the cling layer contains from about 50% to about 95% of the styrenic block copolymer by weight and from about 5% to about 50% of the polyethylene resin by weight.
A multilayer film comprising
- a first surface layer having a coefficient of friction at least less than about 0.9, comprising at least a polypropylene copolymer 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 polyethylene resin, and
- a core layer, positioned between the first surface layer and the second surface layer, comprising one layer or a plurality layers,
- wherein at least one layer of the core layer comprises linear low-density polyethylene resin or its blend and
- wherein the second surface layer contains from about 50% to about 95% of the styrenic block copolymer by weight and from about 5% to about 50% of the polyethylene resin by weight.
A multilayer film comprising
- a slip layer comprising at least a polypropylene copolymer and high-density polyethylene blend,
- a cling layer comprising at least a styrenic block copolymer and an ethylene-octene copolymer resin, and
- an intermediary layer comprising one layer or a plurality of individual layers,
- wherein at least one layer of the intermediary layer comprises linear low-density polyethylene resin or its blend and
- wherein the cling layer contains from about 50% to about 95% of the styrenic block copolymer by weight and from about 5% to about 50% of the ethylene-octene copolymer resin by weight.
Dependencies are inferred from the claim text.