Process for the preparation of thermoplastic resin film

Details Process for the preparation of thermoplastic resin film Process for the preparation of thermoplastic resin film

1995-07-05

1997-10-14

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264346, B29C 5514

Patent

active

056769024

ABSTRACT:
A process for preparing a thermoplastic resin film having uniform physical and chemical properties includes extending a thermoplastic resin sheet in a longitudinal direction so that the crystallization energy of the longitudinally extended sheet is 20 J/g or more to give a longitudinally extended sheet, extending the longitudinally extended sheet in a transverse direction to give a biaxially extended film, and heat treating the biaxially extended film to give the resin film.

REFERENCES:
patent: 5085933 (1992-02-01), Katoh et al.
patent: 5366685 (1994-11-01), Fujii et al.
patent: 5411695 (1995-05-01), Yamada et al.

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