Vacuum pinning of molten thermoplastic film to a roughened casti

Details Vacuum pinning of molten thermoplastic film to a roughened casti Vacuum pinning of molten thermoplastic film to a roughened casti

1982-08-20

1985-02-26

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

264216, 264310, B29D 702

Patent

active

045017123

ABSTRACT:
A process is disclosed for increasing the casting speed in manufacturing thermoplastic film and in increasing the quality of film made thereby. The film is cast, in molten form during manufacture, by means of a vacuum, onto a quench roll (casting roll) having a surface roughness of at least 3 microinches (0.08 micrometers).

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