Porous stretched article of polypropylene-based resin and proces

Details Porous stretched article of polypropylene-based resin and proces Porous stretched article of polypropylene-based resin and proces

1994-05-17

1996-02-13

Mulcahy, Peter D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

264 41, 264154, 2642888, 2642902, C08K 520

Patent

active

054911885

ABSTRACT:
Disclosed are a process for producing a porous stretched article of .beta.-crystalline polypropylene-based resin, the process comprising the steps of crystallizing a melt of a polypropylene-based resin composition at a temperature of 15.degree. to 140.degree. C. to form a solidified product containing .beta.-form crystals and stretching the resulting solidified product at a temprature which is higher than 20.degree. C. but lower than the melting point of the .beta.-form crystals in said solidified product, the polypropylene-based resin composition comprising a polypropylene-based resin and 0.0001 to 5 parts by weight, per 100 parts by weight of the polypropylene-based resin, of at least one specific amide compound; and a porous stretched article produced by the process.

REFERENCES:
patent: 4726989 (1988-02-01), Mrozinski et al.
patent: 4863997 (1989-09-01), Shibuya et al.
patent: 5132157 (1992-07-01), Asanuma et al.

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