Process for preparing an air-permeable film

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ

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Details

264154, 2642888, 264565, 264566, B29C 6720, B29C 5512, B29C 5528

Patent

active

045856044

ABSTRACT:
A process for producing an air-permeable film, which comprises:

REFERENCES:
patent: 2987767 (1961-06-01), Berry et al.
patent: 3154461 (1964-10-01), Johnson
patent: 3758661 (1973-09-01), Yamamoto et al.
patent: 3765999 (1973-10-01), Toyoda
patent: 4350655 (1982-09-01), Hoge

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