Method for the production of biaxially stretched polyester film

Details Method for the production of biaxially stretched polyester film Method for the production of biaxially stretched polyester film

1994-11-17

1995-06-27

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

2642902, 428330, 428694R, 428900, 428910, B29C 7100, D03D 300

Patent

active

054277302

ABSTRACT:
A method for the production of biaxially stretched polyester film.
The method comprises the steps of: adding cubic calcium carbonate particles of calcite structure satisfying the following conditions at any stage of polyester preparation, so as to prepare polyester resin:

REFERENCES:
patent: 3884870 (1975-05-01), Dodson et al.
patent: 4138386 (1979-02-01), Motegi et al.
patent: 4539389 (1985-09-01), Kiriyama et al.
patent: 5006589 (1991-04-01), Sakamoto et al.
patent: 5071690 (1991-12-01), Fukuda et al.
patent: 5106681 (1992-04-01), Endo et al.

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