POLYESTER-BASED CONJUGATED YARN, METHOD FOR PRODUCING THE SAME AND FABRIC
Document Type and Number:
Japanese Patent JP3690274
PROBLEM TO BE SOLVED: To produce a polyester-based conjugated yarn exhibiting high bulkiness and excellent crimp-developing ability and capable of obtaining excellent high- quality fabric, scarcely developing Yoryu-like (purple willow) crepe even when the yarn is twistless or soft twist yarn and excellent in soft stretchability.
SOLUTION: The polyester-based conjugated yarn is characterized in that the yarn is a multifilament composed of a conjugated fiber. The conjugated fiber is obtained by laminating two kinds of polyester-based polymers A and B side by side in the direction of fiber length. The polyester-based polymer A is a polyester mainly consisting of polytrimethylene terephthalate and the polyester-based polymer B is a fiber-forming polyester and the cross section of the conjugated fiber has a flat shape having a conjugate interface in the minor axis direction and the outer periphery of the polyester-based polymer B has a nearly circular shape and the outer periphery of the polyester-based polymer A has a nearly elliptical or square shape and ovality represented by a ratio of the minor axis to the major axis of cross section is 1.3 to 6.
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