| 摘要 |
<p>PCT No. PCT/CH88/00179 Sec. 371 Date Jun. 8, 1989 Sec. 102(e) Date Jun. 8, 1989 PCT Filed Oct. 6, 1988 PCT Pub. No. WO89/03437 PCT Pub. Date Apr. 20, 1989.In a process for manufacturing a smooth, dimensionally stable, shrink-resistant polyester filament yarn, the starting product is a polyester POY. The polyester POY (5a) is cold-stretched (5b) in a stretching ratio of 1.8 to 2.5 and then relaxed with an advance of approximately 3 to 10%. The yarn so obtained has an initial modulus of 600 to 1200 cN/tex, a reversibility limit greater than >8 cN/tex, and an extensibility less than <20%. It is used as a high-strength polyester yarn whenever dimensional stability is essential.</p> |
