Jiangsu Hengli Chemical Fibre Co., Ltd.

Lijun Wang

Chaoming Yang

Guanfan Jin

Huirong Zhao

Yiwei Shao

Zhujun Ding

Ye Zhang

Xiaobing Fan

Huaizhi Zhuo

A low chromatic aberration polyester different-shrinkage composite yarn is made of polyester POY yarn and polyester FDY composite yarn. The polyester POY yarn and polyester FDY yarn is obtained by spinning the polyester solution, the rupture strength of the low color polyester different-shrinkage composite yarn is &#x2265;1.9 cN/dtex, the elongation at break is 30.0&#xb1;5.0%, the crimp shrinkage is 2.50&#xb1;3.0%, the network degree is 20&#xb1;5/m, the color difference &#x394;E is less than 0.200. In the invention, the magnesium ethylene glycol is relatively mild, the thermal degradation coefficient is small, the oligomers in the polymerization process is reduced, and the oligomers in the dissolution process are further reduced, so that the appearance of stains and streaks reduces during the dyeing and post-processing heat setting of the polyester fiber, which ensures the fiber's leveling and rubbing fastness.

Low chromatic aberration polyester different-shrinkage composite yarn

The present invention discloses an ultra-low shrinkage polyester industrial yarn and its preparation method. The ultra-low shrinkage polyester industrial yarn is prepared by subjecting a polyester to dissolution, washing and solid state polycondensation followed by spinning. The ultra-low shrinkage polyester industrial yarn has a dry heat shrinkage rate of 1.8&#xb1;0.25% under test conditions of 177&#xb0; C.&#xd7;10 min&#xd7;0.05 cN/dtex. The polycondensation catalyst consists of magnesium ethylene glycol and antimony ethylene glycol, has a small thermal degradation coefficient. The present invention reduces oligomers during polymerization, reduces thermal degradation during processing, and as a result the invention greatly reduces impurities and nucleating agent in the polyester, leading to an increase in the probability of homogeneous nucleation based on the reduction of heterogeneous nucleation. The dissolution and washing of polyester further decreases oligomer content, facilitating the growth of the grain size and the optimization of crystal perfection in the ultra-low shrinkage polyester industrial yarn.

Ultra-low shrinkage polyester industrial yarn and its preparation method

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Suzhou, China

Lijun Wang