Process for producing sheet-like structures from vinyl alcohol p

Details Process for producing sheet-like structures from vinyl alcohol p Process for producing sheet-like structures from vinyl alcohol p

1982-11-22

1985-01-15

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

264102, 264185, B29F 303

Patent

active

044938071

ABSTRACT:
A sheet-like structure is produced from a vinyl alcohol polymer by a method wherein, in a self-cleaning multi-screw extruder, the polymer is mixed with a small amount of water, the mixture is melted, homogenized, devolatilized and finally extruded as a melt, and the extrudate is shaped in a conventional manner into the sheet-like structure.

REFERENCES:
patent: 3345466 (1967-10-01), Kurashige
patent: 3873508 (1975-03-01), Turner
patent: 4065532 (1977-12-01), Wild et al.
patent: 4215169 (1980-07-01), Wysong
patent: 4244914 (1981-01-01), Ranalli et al.

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