Use of a chemical compound during frizz of fibers made of crystalline polypropylene or crystalline copolymers of polypropylene

摘要

Synthetic thermoplastic fibers are crimped in the presence of steam in a crimping zone wherein there are present a defined first region of low but increasing steam pressure, a defined second region of substantially constant, relatively high steam pressure, and a defined third region of decreasing steam pressure. Superior crimped products are obtained having a more permanent bulkiness which resists deterioration during further processing and subsequent use.