公开(公告)号：US10815333B2

公开(公告)日：2020-10-27

申请号：US15744853

申请日：2016-06-12

Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.

Inventor： Hongwei Fan ,  Wengang Li ,  Yanfang Wang ,  Lili Wang ,  Damao Yang ,  Fangming Tang ,  Lixin Yin ,  Guangkun Song

IPC: C08G63/183 ,  C08G63/83 ,  D01F6/62

Abstract: A high-modulus low-shrinkage polyester industrial yarn obtained by subjecting a polyester to dissolution, washing and solid state polycondensation followed by spinning. The high-modulus low-shrinkage polyester industrial yarn has a dry heat shrinkage rate of 2.0±0.25% under test conditions of 177° C.×10 min×0.05 cN/dtex. The average value of the crystal volume Vc of the high-modulus low-shrinkage polyester industrial yarn is larger than 230 nm3. The high-modulus low-shrinkage polyester industrial yarn has a fiber modulus of ≥100 cN/dtex. The polycondensation catalyst consists of magnesium ethylene glycol and antimony ethylene glycol, which has a small thermal degradation coefficient.

公开(公告)号：US10801132B2

公开(公告)日：2020-10-13

申请号：US16322949

申请日：2017-06-26

Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.

Inventor： Hongwei Fan ,  Lili Wang ,  Xiaobing Fan ,  Damao Yang ,  Guangkun Song ,  Huirong Zhao ,  Shanshui Wang

IPC: C08G63/183 ,  D01D5/247 ,  D01D5/253 ,  D01D5/08 ,  C08G63/91 ,  D01D4/02 ,  D01F6/84 ,  D01F6/92 ,  C08J3/22 ,  C08L67/02 ,  D01F1/06 ,  D01F1/10

Abstract: A high uniformity coloured polyester industrial yarn and preparation method. The raw material of the high-uniformity coloured polyester industrial yard is the modified polyester composed of terephthalic acid segment, an ethylene glycol segment and a branched diol. The high-uniformity coloured polyester industrial yarn is prepared by esterification reaction of terephthalic acid with a branched diol using concentrated sulfuric acid as catalyst to obtain terephthalic acid glycol ester. Terephthalic acid and ethylene glycol are formulated to carry out esterification reaction to obtain ethylene terephthalate. Finally, stir and mix the two materials and carry out the polycondensation reaction in the low vacuum stage and the high vacuum stage under the action of the catalyst and the stabilizer to obtain modified polyester. Measure the modified polyester and add black masterbatch. After porous spinneret extrusion, cooling, oiling, drawing, heat setting and winding the modified polyester, high uniformity coloured polyester industry yarn is obtained.