Method of producing ethylene-vinyl alcohol copolymer film

Details Method of producing ethylene-vinyl alcohol copolymer film Method of producing ethylene-vinyl alcohol copolymer film

1979-12-19

1981-10-13

Lowe, James B.

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

Synthetic resins

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

2642358, 2642902, B29C 1702, B29C 2500, C08F 1606, C08L 2904

Patent

active

042949351

ABSTRACT:
An ethylene-vinylalcohol copolymer film is prepared by biaxially or multiaxially stretching a nonstretched ethylene-vinylalcohol polymer film having a moisture content of not more than 3.5%, said ethylenevinyl alcohol copolymer having an ethylene content of 20 to 55 mole % and a saponification degree of not less than 96 mole % and said stretching being conducted within a temperature range of 50.degree. to 150.degree. C. to such an extent that the film is expanded to an area 4 to 20 times the original area.

REFERENCES:
patent: 3419654 (1968-12-01), Chiba et al.
patent: 3440316 (1969-04-01), Miyake et al.
patent: 3585177 (1971-06-01), Gardner et al.
patent: 3595740 (1971-07-01), Geson

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