Gas barrier film and production process thereof

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

1994-09-22

1996-11-12

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...

525221, C08L 2904, C08L 3302

Patent

active

055740960

ABSTRACT:
Disclosed herein is a gas barrier film formed from a mixture containing polyvinyl alcohol and a partially neutralized product of poly(meth)acrylic acid in a weight ratio of 95:5 to 10:90, and having an oxygen permeability constant of 1.25.times.10.sup.-3 ml(STP).multidot.cm/m.sup.2 .multidot.h.multidot.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 a partially neutralized product of poly(meth)acrylic acid is subjected to a heat treatment under specific conditions, is also disclosed. The gas barrier film of the invention is excellent in water resistance and oxygen gas barrier property, free of any chlorine atom, and scarcely colored.

REFERENCES:
patent: 2169250 (1939-08-01), Izard
patent: 3133865 (1964-05-01), Richardson et al.
patent: 4320040 (1982-03-01), Fujita et al.

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