Texturized, combined polyester multifilament yarn and process for producing same

摘要

A texturized, combined polyester multifilament yarn formed from two types of polyester multifilaments FYA and FYB different in polymer chemical composition from each other and appropriately intermingled with each other, in which yarn, the multifilaments FYB have an average filament length in straightened form of 8 to 40% longer than that of the multifilaments FYA, the coefficient of variation (CV_A) of the filament length of FYA is 3% or less, and coefficient of variation (CV_B−A) in difference between the individual filament lengths of the FYB and the average filament length of the FYA is 10 to 20%. The yarn exhibits a high bulkiness and a large filament yarn difference and is free from slippage between the sheath FYB layer and the core FYA portion.