PROBLEM TO BE SOLVED: To provide a heteroshrinkable polyester combined filament yarn suitable for producing silky woven/knitted fabrics excellent in puffiness, dry touch, drape and firm texture despite fundamentally maintaining both the feeling and characteristics of silk.;SOLUTION: This heteroshrinkable polyester combined filament yarn is obtained by a direct spin-draw method using two kinds of polyesters; wherein the lower-shrinkage yarn contains 1-5 mass% of a ceramic compound, while the higher-shrinkage yarn is made from a copolyester from 2,2-bis[4-(β- hydroxyethoxy)phenyl]propane and isophthalic acid, and the boiling water shrinkage difference between the higher-shrinkage yarn and the lower-shrinkage yarn is 5-25% and the thermal shrinkage stress of the higher-shrinkage yarn is 0.2-0.35 cN/dtex.;COPYRIGHT: (C)2002,JPO
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