Multilayer plastic container

Details Multilayer plastic container Multilayer plastic container

1988-10-07

1990-04-24

Seidleck, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

206204, 2065243, 426127, 428 367, 428327, 428480, 428516, 428520, 428522, B65D 8126, B32B 2714

Patent

active

049199846

ABSTRACT:
An improvement in a packaging multilayer plastic container comprising a gas-barrier interlayer of an ethylene/vinyl alcohol copolymer and an inner and an outer layer of a moisture-resistant thermoplastic resin such as a polyester sandwiching the interlayer. An intermediary layer comprising particles of a high water-absorbing resin dispersed in a resinous medium is provided between the gas-barrier layer and each of the inner and outer layers. Crosslinked polyacrylic acid or its salt or a vinyl alcohol/acrylic acid (salt) block copolymer, for example, may be used as the highly water-absorbing resin. Because of its high saturation moisture absorption at high temperatures, the highly water-absorbing resin is effective for preventing degradation of the gas-barrier property of the ethylene/vinyl alcohol copolymer during retorting.

REFERENCES:
patent: 4181637 (1980-01-01), Busch et al.
patent: 4314558 (1982-02-01), Korpman
patent: 4407897 (1983-10-01), Farrell et al.
patent: 4425410 (1984-01-01), Farrell et al.
patent: 4522775 (1985-06-01), Briggs et al.
patent: 4525527 (1985-06-01), Takeda et al.

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