公开(公告)号：US4105740A

公开(公告)日：1978-08-08

申请号：US536644

申请日：1974-12-26

申请人： Hiroshi Yasuda ,  Katsuya Tani ,  Jiro Nagatamo

发明人： Hiroshi Yasuda ,  Katsuya Tani ,  Jiro Nagatamo

IPC分类号： D01F6/62 ,  D02J1/22

CPC分类号： D01F6/62 ,  D02J1/22

摘要： Stretching polyester tows at a speed greater than 150 m/min., wherein more than 85 mol percent of the recurring units are units of ethylene terephthalate, is carried out at a stretch ratio satisfying the formula-1.58log(.DELTA.n .times. 10.sup.3) + 4.18 .ltoreq. DR .ltoreq. -2.32log(.DELTA.n .times. 10.sup.3) + 5.93Wherein .DELTA. n represents the birefringence of the unstretched filaments and is a value of from 0.020 to 0.100, and DR is the stretch ratio in times.

摘要翻译： 以大于150m / min的速度拉伸聚酯丝束，其中大于85mol％的重复单元是对苯二甲酸乙二醇酯的单元，以满足式-1.58LOG（DELTA N×103）+ 4.18