| 摘要 |
Improved multifilament polyester yarn has good processibility on knitting machines and provides good fabric bulk when used in combination with ordinary polyester yarn. The yarn is an assembly of low-shrinkage, continuous filaments of synthetic linear condensation polyester which are substantially free of crimp. The filaments are drawn and relaxed under conditions which provide a yarn having a sonic velocity value of 1.9 to 3.0 kilometers per second, an X-ray crystallinity value of 16 to 35 percent, and a single shrinkage-tension peak at a temperature below 100 DEG C.
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