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Title:
HIGH MODULUS LOW SHRINKAGE ACTIVATED POLYESTER INDUSTRIAL YARN AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/134490
Kind Code:
A1
Abstract:
The present invention relates to a high modulus low shrinkage activated polyester industrial yarn and a preparation method therefor. The preparation method comprises: first, mixing terephthalic acid, ethylene glycol, and heptanediol with a tert-butyl side group uniformly, and then performing an esterification reaction and a polycondensation reaction to obtain modified polyester; and then the modified polyester is subjected to viscosity increase by solid phase polycondensation, melting, metering, extrusion, cooling, oiling, stretching, heat setting, relaxation heat treatment, oiling with an activation oil, winding, and pre-activation treatment to produce the high modulus low shrinkage activated polyester industrial yarn, the relaxation heat treatment refers to passing polyester tows through a space at a certain temperature in an appropriate relaxed state, and the appropriate relaxed state means that the overfeed rate of winding is 3.0 to 5.0%, and the certain temperature means 200 to 220°C. According to the present invention, the polyester is modified by using heptanediol with a tert-butyl side group, thereby improving the use efficiency of an activator, and by means of coordination of a heat treatment temperature with a high overfeed rate, the heat shrinkage in an application process is reduced, and a simple process is provided.

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Inventors:
TANG FANGMING (CN)
WANG SHANSHUI (CN)
YANG DAMAO (CN)
Application Number:
PCT/CN2019/113658
Publication Date:
July 02, 2020
Filing Date:
October 28, 2019
Export Citation:
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Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
D01F6/92; C08G63/183; C08G63/86; D01D5/08; D01D5/088; D01D5/16; D01D10/02; D01F1/10
Foreign References:
CN109735942A2019-05-10
CN109750380A2019-05-14
CN109763194A2019-05-17
CN108385418A2018-08-10
KR101734892B12017-05-12
US4113704A1978-09-12
CN108385188A2018-08-10
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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