The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2024
Filed:
Aug. 25, 2020
Tongkun Group Co., Ltd., Zhejiang, CN;
Zhejiang Sci-tech University, Zhejiang, CN;
Xuzhen Zhang, Zhejiang, CN;
Wenxing Chen, Zhejiang, CN;
Yanlin Sun, Zhejiang, CN;
Xiuhua Wang, Zhejiang, CN;
Shaobo Liu, Zhejiang, CN;
Xueyan Lin, Zhejiang, CN;
Shunli Xiao, Zhejiang, CN;
TONGKUN GROUP CO., LTD., Zhejiang, CN;
ZHEJIANG SCI-TECH UNIVERSITY, Zhejiang, CN;
Abstract
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.