公开(公告)号：US12000065B2

公开(公告)日：2024-06-04

申请号：US17603578

申请日：2020-08-25

申请人： TONGKUN GROUP CO., LTD. ,  ZHEJIANG SCI-TECH UNIVERSITY

发明人： Xuzhen Zhang ,  Wenxing Chen ,  Yanlin Sun ,  Xiuhua Wang ,  Shaobo Liu ,  Xueyan Lin ,  Shunli Xiao

IPC分类号： D01D5/088 ,  B29B13/06 ,  D01D5/092 ,  D01D5/096 ,  D01D5/12 ,  D01D5/22 ,  D01D5/32 ,  D01D7/00 ,  D01D10/02 ,  D01D10/04 ,  D01D10/06 ,  D01F8/14 ,  D02G1/00 ,  D02J1/22 ,  D02J13/00 ,  B29B9/16

CPC分类号： D01D5/22 ,  B29B13/065 ,  D01D5/32 ,  D01D10/02 ,  D01D10/0409 ,  D01D10/06 ,  D01F8/14 ,  D02G1/004 ,  D02J1/228 ,  D02J13/003 ,  D02J13/005 ,  B29B2009/165 ,  D10B2331/04

摘要： The present invention discloses a method for preparing a PET/PTT parallel complex filament with high self-crimpiness, wherein PET and PTT are sliced, dried and crystallized, and then fused separately and subjected to extrusion molding through a parallel-type spinneret plate; oil is applied after cooling; then level 1-3 drafting and heat setting treatment are adopted; and during drafting, a total drafting rate is controlled to be 3 to 3.5, wherein the level-1 drafting rate is 2.8 to 3.0 at a temperature controlled to be 75 to 80° C., according to the method for preparing the PET/PTT parallel complex filament with high self-crimpiness, methods like multi-level drafting for increasing the drafting rate are adopted, and the effects of improving the fiber strength, moderately lowering the breaking elongation, and greatly improving the self-crimpiness are achieved.