公开(公告)号：US10358525B2

公开(公告)日：2019-07-23

申请号：US15744867

申请日：2016-06-12

Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.

Inventor： Hongwei Fan ,  Fangming Tang ,  Xiaoyu Wang ,  Wengang Li ,  Lili Wang ,  Shanshui Wang ,  Qianhan Liu ,  Zangzang Niu

IPC: C08G63/02 ,  C08G63/183 ,  C08G63/83 ,  C08G63/90 ,  C08G63/86 ,  C25B3/12 ,  D01F6/62 ,  C08G63/78

Abstract: A polyester obtained by the esterification of terephthalic acid and ethylene glycol and the polycondensation catalysed by a mixture of magnesium ethylene glycol and antimony ethylene glycol followed by granulation. In the polyester sections, the carboxyl end group is less than 15 mol/t, the mass percentage of oligomer is lower than 0.5%, and weight percentage of diethylene glycol is lower than 0.5%.

公开(公告)号：US12077883B2

公开(公告)日：2024-09-03

申请号：US18269968

申请日：2021-08-25

Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.

Inventor： Shanshui Wang ,  Fangming Tang ,  Lili Wang ,  Yiwei Shao ,  Yanli Zhao ,  Xiaoyu Wang ,  Chaoming Yang

IPC: D01F6/84 ,  C08G63/183 ,  C08G63/685 ,  C08G63/80 ,  C08G63/86 ,  C08G63/91 ,  D01D5/08 ,  D01F11/08

CPC classification number: D01F6/84 ,  C08G63/183 ,  C08G63/6856 ,  C08G63/80 ,  C08G63/866 ,  C08G63/916 ,  D01D5/08 ,  D01F11/08 ,  D10B2331/04 ,  D10B2401/063

Abstract: A high-strength thermal-stability polyester industrial yarn is prepared by spinning, winding and coordination treatment of a modified polyester after a solid-state polycondensation; wherein the method of coordination treatment comprises: soaking the wound fiber in an aqueous solution of a coordination agent, and the concentration of the aqueous solution of the coordination agent is 0.1-0.2 mol/L; wherein the condition of coordination treatment is 48-72 hours at 80-100° C., and the concentration of the aqueous solution of the coordination agent is 0.1-0.2 mol/L; wherein the polyester segments of the prepared high-strength thermal-stability polyester industrial yarn comprises a terephthalic acid segment, an ethylene glycol segment and a 2,6-pyridinedicarboxylic acid segment, and 2,6-pyridinedicarboxylic acid segments of different polyester segments are coordinated by Fe3+, the molar ratio of the terephthalic acid segment to the 2,6-pyridinedicarboxylic acid segment is 1:(0.03-0.05).

公开(公告)号：US11248087B2

公开(公告)日：2022-02-15

申请号：US17277302

申请日：2019-10-29

Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.

Inventor： Lili Wang ,  Xiaoyu Wang ,  Fangming Tang

IPC: C08G63/688 ,  D01F6/84

Abstract: A type of cationic dyeable polyester fiber and preparing method thereof are disclosed. The preparing method is to manufacture a fiber from a cationic modified polyester through a fully drawn yarn (FDY) process, wherein the cationic modified polyester is composed of terephthalic acid segments, ethylene glycol segments, sodium salt of diethylene ester of 5-sulfoisophthalic acid segments and tert-butyl branched diol segments and a molecular formula of tert-butyl branched diol is as following: The cationic modified polyester is further dispersed with a high temperature calcined solid heteropolyacid. A final fiber has a dye uptake of 87.8-92.2% and a K/S value of 23.27-25.67 when dyed at 120° C., as well as an intrinsic viscosity drop of 13-17% when stored at 25° C. and R.H. 65% for 60 months.