Process of producing porous polypropylene hollow fiber and film

Details Process of producing porous polypropylene hollow fiber and film Process of producing porous polypropylene hollow fiber and film

1994-01-13

1995-07-25

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

2642095, 2642105, 2642108, 2642356, 2642888, 2642905, B29C 5506, B29C 6720, D01D 5247, D01F 606

Patent

active

054359554

ABSTRACT:
A process of producing a porous polypropylene hollow fiber or film which comprises a step for forming a large number of micropores in the surrounding wall of said fiber or in said film by drawing a polypropylene hollow fiber or film, which is characterized in that the drawing process is performed at a temperature in the range of 110.degree.-155.degree. C. and at a drawing rate of less than 10%/min.

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