Back to results
US 2017/0282507 A1Published application
Biaxially oriented polyolefin film with high moisture vapor barrier and stiffness properties
AssigneeToray Plastics (America), Inc.
InventorsShichen DOU, Keunsuk P. CHANG
Life of this patent
Estimating the term…
Abstract
Described are coextruded multi-layer biaxially oriented polyolefin barrier films with improved processability, moisture vapor barrier, and stiffness. The disclosed films comprise a cyclic olefin copolymer (COC) core layer blended with hydrogenated hydrocarbon resin and at least one outer layer having functionality for solvent resistance, heat sealing, or winding, or printing/coatings or adhesion for lamination.
Claims34
A coextruded multilayer film comprising:
- a core layer comprising at least 70 wt % cyclic olefin copolymer (COC), cyclo olefin polymer (COP), or blends thereof and 1-10 wt % hydrogenated hydrocarbon resin;
- a polyolefin outer layer on a side of the core layer.
A method of making a biaxially oriented film comprising:
- coextruding a film comprising a core layer comprising at least 70 wt % cyclic olefin copolymer (COC), cyclo olefin polymers (COP), or blends thereof and 1-10 wt % hydrogenated hydrocarbon resin;
- a first outer layer on a side of the core layer;
- and a second outer layer on a side of the core layer opposite the first outer layer;
- orienting the film, wherein the film is oriented 1.5-3.5 times in the machine direction and 2-8 times in the transverse direction.
1 more element
Dependencies are inferred from the claim text.