POLYESTER FALSE TWIST YARN HAVING HIGH SHRINKAGE/HIGH SHRINKAGE STRESS, METHOD FOR PRODUCING THE SAME AND COMBINED FILAMENT YARN

摘要

PROBLEM TO BE SOLVED: To obtain a polyester false twist yarn having excellent stretch back properties, proper bulkiness, high shrinkage/high shrinkage stress free from deepened feeling and to provide a method for producing the polyester false twist yarn. ;SOLUTION: This polyester false twist yarn substantially comprises a polypropylene terephthalate yarn and has characteristics of 10-25% shrinkage percentage in boiling water, 400-800 mg/d shrinkage stress and 90-160°C heat stress peak temperature and false twist crimp. This method for producing the polyester false twist yarn comprises setting a yarn temperature at an outlet of a heater at a room temperature to 100°C in subjecting the polypropylene terephthalate undrawn yarn to drawing and false twist processing.;COPYRIGHT: (C)2001,JPO