申请人:JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.
公开号:US11352719B2
公开(公告)日:2022-06-07
A type of polyester yarn for an industrial sewing thread and preparing method thereof are provided. The preparing method is composed of a viscosity enhancing by a solid state polycondensation and a melt spinning for a modified polyester, and the modified polyester is a product of esterification and polycondensation of evenly mixed terephthalic acid, ethylene glycol, tert-butyl branched dicarboxylic acid, trimethylsilyl branched diol and a doped Sb2O3 powder, wherein the tert-butyl branched dicarboxylic acid is selected from the group consisting of 5-tert-butyl-1,3-benzoic acid, 2-tert-butyl-1,6-hexanedioic acid, 3-tert-butyl-1,6-hexanedioic acid and 2,5-di-tert-butyl-1,6-hexanedioic acid. Moreover, the modified polyester is dispersed with a doped ZrO2 powder. An obtained fiber has an intrinsic viscosity drop of 23-28% when stored at 25° C. and R.H. 65% for 60 months.
本发明提供了一种用于工业缝纫线的聚酯纱线及其制备方法。该制备方法由固态聚缩和熔融纺丝组成,用于改性聚酯,所述改性聚酯是均匀混合的对苯二甲酸、乙二醇、叔丁基支链二羧酸、三甲基硅基支链二醇和掺杂的Sb2O3粉末的酯化和聚合产物,其中叔丁基支链二羧酸选自5-叔丁基-1,3-苯二甲酸、2-叔丁基-1,6-己二酸、3-叔丁基-1,6-己二酸和2,5-二叔丁基-1,6-己二酸组成的群体。此外,改性聚酯还与掺杂的ZrO2粉末分散。在25°C和R.H. 65%下储存60个月后,所得纤维的固有粘度降低了23-28%。