High oxygen barrier coextruded film
First Claim
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1. A coextruded multi-layer thermoplastic film comprising:
- (a) a layer comprising vinylidene chloride copolymer;
(b) a layer comprising ethylene vinyl alcohol copolymer;
(c) an intermediate layer disposed between said vinylidene chloride copolymer and ethylene vinyl alcohol copolymer layers and comprising an adhesive polymeric material;
(d) fourth and fifth layers disposed on the respective surfaces of the vinylidene chloride copolymer and ethylene vinyl alcohol copolymer layers opposite said intermediate layer, either of said fourth and fifth layers comprising an adhesive polymeric material, and the other of said fourth or fifth layers comprising a copolymer of ethylene; and
(e) sixth and seventh layers disposed on the outside of said fourth and fifth layers, said sixth and seventh layers selected from the group consisting of polyolefins and copolymers of ethylene.
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Abstract
A coextruded multilayer film includes a layer of a vinylidene chloride copolymer, and a layer of ethylene vinyl alcohol copolymer. The coextruded film has high oxygen barrier properties under both high and low humidity conditions.
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Citations
20 Claims
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1. A coextruded multi-layer thermoplastic film comprising:
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(a) a layer comprising vinylidene chloride copolymer; (b) a layer comprising ethylene vinyl alcohol copolymer; (c) an intermediate layer disposed between said vinylidene chloride copolymer and ethylene vinyl alcohol copolymer layers and comprising an adhesive polymeric material; (d) fourth and fifth layers disposed on the respective surfaces of the vinylidene chloride copolymer and ethylene vinyl alcohol copolymer layers opposite said intermediate layer, either of said fourth and fifth layers comprising an adhesive polymeric material, and the other of said fourth or fifth layers comprising a copolymer of ethylene; and (e) sixth and seventh layers disposed on the outside of said fourth and fifth layers, said sixth and seventh layers selected from the group consisting of polyolefins and copolymers of ethylene. - View Dependent Claims (2, 3, 4, 5)
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6. A coextruded multi-layer thermoplastic film comprising
(a) a first layer comprising a copolymer of ethylene; -
(b) a second layer comprising a copolymer of ethylene; (c) a third or barrier layer comprising vinylidene chloride copolymer; (d) a fourth layer comprising an adhesive polymeric material; (e) a fifth or barrier layer comprising ethylene vinyl alcohol copolymer; (f) a sixth layer comprising an adhesive polymeric material; and (g) a seventh layer comprising a copolymer of ethylene. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification