Polyolefin laminate film for cardboard lamination
AssigneeToray Plastics (America), Inc.
InventorsShichen DOU, Scott NARKEVICIUS, John J. FITCH
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Abstract
Described are polyolefin laminate films including a core layer, a first outer layer on one side including a blend of 5-20 wt % modified polar polyolefin, 5-20 wt % ethylene-propylene copolymer and 80-90 wt % mini-random polypropylene, and an optional second outer layer on the other side of said core layer opposite the first outer layer, including mini-random polypropylene or copolymers or combinations thereof. The laminate film is suitable for hot melt adhesive lamination with paper or cardboard to package a product.
Claims35
A laminate film structure comprising:
- a core layer comprises at least 50 wt % polyolefin;
- a first outer layer comprising a blend of a modified polar polyolefin and ethylene-propylene copolymer or mini-random polypropylene;
- a cardboard or paper layer;
- and
- a hot melt adhesive layer to adhere the first outer layer to the cardboard or paper layer.
A laminate film structure comprising:
- a core layer comprises at least 50 wt % polyolefin;
- a first outer layer comprising maleic anhydride-grafted polyolefins, ethylene copolymerized polar polymers, ethylene-propylene copolymers and mini-random polypropylene;
- a cardboard or paper layer;
- and
- a hot melt adhesive layer to adhere the first outer layer to the cardboard or paper layer.
A method of making a laminate film structure comprising:
- co-extruding a film comprising a core layer comprises at least 50 wt % polyolefin and a first outer layer comprising a blend of a modified polar polyolefin and ethylene-propylene copolymer or mini-random polypropylene;
- and
- bonding a cardboard or paper layer to the film using a hot melt adhesive.
Dependencies are inferred from the claim text.