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US 11,446,909 B2Granted
High-slip stretch film
AssigneeBerry Plastics Corporation
InventorsMichael A. Kinnan, Brooke D. Kitzmiller
Life of this patent
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Abstract
A multi-layer stretch wrap film has three or more layers, including at least one outer non-cling layer, at least one inner core layer, and at least one outer cling layer, where the film displays enhanced non-cling properties after being stretched.
Claims19
A multilayer stretch film comprising
- a non-cling layer comprising (i) 50-99% by weight of the layer of a polyethylene blend comprising low density polyethylene (LDPE) and linear low density polyethylene (LLDPE) and (ii) polystyrene,
- a core layer comprising at least one polyolefin, and
- a cling layer comprising ultra-low density polyethylene, very low density polyethylene, polyisobutylene, linear low density polyethylene, or mixtures thereof,
- wherein the non-cling layer is more slippery when the multilayer stretch film is in a stretched state compared to the non-cling layer when the multilayer stretch film is in an unstretched state.
1 more element
A multilayer stretch film comprising
- a non-cling layer comprising polyethylene and polystyrene,
- a core layer comprising at least one polyolefin, and
- a cling layer comprising ultra-low density polyethylene, very low density polyethylene, polyisobutylene, linear low density polyethylene, or mixtures thereof,
- wherein the non-cling layer is more slippery when the multilayer stretch film is in a stretched state compared to the non-cling layer when the multilayer stretch film is in an unstretched state, and
- wherein the non-cling layer is free of polypropylene.
2 more elements
A multilayer stretch film comprising
- a non-cling layer comprising 50-99% by weight polyethylene and 1-25% by weight polystyrene, based on the weight of the non-cling layer,
- a core layer comprising at least one polyolefin, and
- a cling layer comprising ultra-low density polyethylene, very low density polyethylene, polyisobutylene, linear low density polyethylene, or mixtures thereof,
- wherein the non-cling layer is more slippery when the multilayer stretch film is in a stretched state compared to the non-cling layer when the multilayer stretch film is in an unstretched state.
1 more element
Dependencies are inferred from the claim text.