Multi-layer material having gas barrier properties

Details Multi-layer material having gas barrier properties Multi-layer material having gas barrier properties

1989-09-28

1992-02-18

Sluby, P. C.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428 367, 428412, 428483, 428 354, 4284763, 4284769, 428910, 426127, 426412, 264535, 264DIG33, 264515, 525 57, B32B 2708, C08L 2904

Patent

active

050893530

ABSTRACT:
A multi-layer material with a layer (A) of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60 mol % and a degree of saponification of at least 90% and a layer (B) of a styrene-based polymer having mainly syndiotactic configuration, or a resin composition comprising 5 to 95 parts by weight of a saponified product of an ethylene-vinyl acetate copolymer (A) having an ethylene content of 20 to 60 mol % and a degreee of saponification of at least 90% and 95 to 5 parts by weight of a styrene-based polymer (B) having mainly syndiotactic configuration has gas barrier properties and markedly improved heat resistance.
In a molding comprising the resin composition or the multi-layer material, contents (food) can be stored for a long period of time at ambient temperature. Moreover, after retort sterilization, the container can be heated by boiling, or in a microwave oven or a grill oven (at 220 to 240.degree. C.) in the condition that the contents (food) are placed in the container.

REFERENCES:
patent: 3949114 (1976-04-01), Viola et al.

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