Polytrimethylene terephthalate fiber, cheese-shaped bobbin, process to produce a polytrimethylene terephthalate fiber, preliminary twist textured yarn, bobbin, process to produce a preliminary twist textured yarn, and, fabric

摘要

"POLYTHRIMETHYLENE TEREFTALATE FIBER, CHEESE SHAPE SPULA, PROCESS TO PRODUCE A POLYTHRIMETHYLENE TEREPTALATE FIBER, PRELIMINARY TORRING TEXTURED YARN, SPRAY YARN, PROCESS TO PRODUCE A TEXTURED, TEXTURED YARN". A polytrimethylene terephthalate fiber, a process for producing it, a cheese shaped bobbin formed from it, a preliminary twist textured yarn using the fiber and a fabric using a preliminary twist textured yarn are provided. The fiber is composed of 90 moles% or more of repeat units of trimethylene terephthalate having a density in the range of 1.320 to 1.340 g / cm ^ 3 ^, a birefringence in the range of 0.030 to 0.070, a peak value of thermal stress in a range of 0.01 to 0.12 cN / dtex, a shrinkage in boiling water in a range of 3 to 40%, and an elongation at break in a range of 40 to 140%. The inventive polytrimethylene terephthalate fiber has both an appropriate crystallinity and orientation and is free of bobbin stiffness due to wire shrinkage and bulging. The inventive fiber can be produced on an industrial scale.