Porous stretched article of polypropylene-based resin and process for its preparation

摘要

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 to 140 DEG C to form a solidified product containing beta -form crystals and stretching the resulting solidified product at a temprature which is higher than 20 DEG 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.