Process to produce thin film

Details Process to produce thin film Process to produce thin film

1992-05-04

1994-02-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

15624411, 264166, 264178R, 2642102, 264171, 2642902, B29C 5512

Patent

active

052884376

ABSTRACT:
A process is described to produce ultra thin biaxially stretched film made of thermoplastic where at least two film webs are superimposed and stretched together in both the longitudinal and transverse directions. The film webs are subjected to a heat treatment before the first draw step. After stretching, the film webs are separated again from each other.

REFERENCES:
patent: 3632733 (1972-01-01), Yazawa
patent: 3734994 (1973-05-01), Blecha
patent: 4076785 (1978-03-01), Schmidt
patent: 4230658 (1980-10-01), Matsukura et al.
patent: 4767488 (1988-08-01), Rasmussen
patent: 4871506 (1989-10-01), Moulies et al.

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