Gas barrier film and production process thereof

Details Gas barrier film and production process thereof Gas barrier film and production process thereof

1994-01-24

1996-09-03

Clark, W. Robinson H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 56, 525221, C08L 2904, C08L 3302

Patent

active

055524796

ABSTRACT:
Disclosed herein is a gas barrier film formed from a mixture containing polyvinyl alcohol and poly(meth)acrylic acid at a weight ratio of 95:5 to 20:80, and having an oxygen permeability constant of 1.25.times.10.sup.-3 ml(STP).cm/m.sup.2.h.atm{Pa} or smaller as measured under conditions of 30.degree. C. and 80% relative humidity. A production process of the gas barrier film, in which a film formed from a mixture containing polyvinyl alcohol and poly(meth)acrylic acid is subjected to a heat treatment under specific conditions, is also disclosed. The gas barrier film of the invention are far excellent in gas barrier property under high-humidity conditions and also superb in water resistance.

REFERENCES:
patent: 2169250 (1939-08-01), Izard
patent: 2557266 (1951-06-01), Dittmar
patent: 3634295 (1972-01-01), Dunlap et al.
patent: 3645939 (1972-02-01), Gaylord
patent: 3736311 (1973-05-01), Subramanian
patent: 3743536 (1973-06-01), Russell
patent: 3801675 (1974-04-01), Russell
patent: 4169088 (1979-09-01), Hansen
patent: 4280942 (1981-07-01), Green
Encyclopedia of Polymer Science & Engineering; (1989); p. 173.

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