Packaging materials having excellent gas permeation resistance a

Details Packaging materials having excellent gas permeation resistance a Packaging materials having excellent gas permeation resistance a

1976-02-23

1978-04-04

Robinson, Ellis

Food or edible material: processes, compositions, and products

Packaged or wrapped product

215 1C, 264241, 426127, 428 35, 428425, 428474, 428483, 428518, 428519, 428520, 428521, 428522, B65D 8500, C08G 4104, B32B 2708

Patent

active

040828549

ABSTRACT:
A packaging material having an improved gas permeation resistance, which comprises at least one layer composed of (A) an ethylene-vinyl alcohol copolymer having a vinyl alcohol content of 50 to 75 mole % and a residual vinyl ester content of up to 4 mole % based on the sum of the vinyl alcohol and vinyl ester or (B) a blend of said ethylene-vinyl alcohol copolymer with up to 150% by weight, based on said copolymer, of at least one thermoplastic polymer other than said copolymer, said ethylenevinyl alcohol copolymer having a main endothermic peak satisfying substantially the following requirement:

REFERENCES:
patent: 3595740 (1971-07-01), Gerou
patent: 3847728 (1974-11-01), Hirata
patent: 3931449 (1976-01-01), Hirata
patent: 3932692 (1976-01-01), Hirata

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