Process for the preparation of polyvinyl alcohol articles of...

Details Process for the preparation of polyvinyl alcohol articles of... Process for the preparation of polyvinyl alcohol articles of...

D - Textiles, Paper

01

F

18/612, 18/789

D01F 6/14 (2006.01) B29C 55/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 1277468

ABSTRACT Polyvinyl alcohol articles of high strength and modulus are obtained by thermoreversible gelation of a polyvinyl alcohol solution, extraction of the gelation solvent using a mixture of a lower alcohol or ketone and water, followed by high stretching. Preferably, a mixture of 5-80 vol.% of acetone and 95-20 vol.% of water is used as extractant. With this process extraction times of only 3-10 minutes are required.

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