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Method for processing polyester staple fibers special for vortex spinning

A technology of polyester staple fiber and processing method, which is applied in the direction of one-component copolyester rayon and other directions to achieve the effects of stable production operation, lower knot failure rate and lower modulus

Active Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it is used to modify polyester chips for fibers, it is usually used to improve the dyeing performance of fibers, but there are few studies on its influence on physical properties such as modulus. Patent novelty search shows that there is no domestic public literature describing the above Isophthalic Acid Modified Polyester as Raw Material Polyester Fiber Used in Vortex Spinning

Method used

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  • Method for processing polyester staple fibers special for vortex spinning
  • Method for processing polyester staple fibers special for vortex spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] On the 300L polymerization device, add PTA, IPA and EG into the polymerization kettle, the molar ratio of dibasic acid to dibasic alcohol is 1:1.39, the amount of IPA added is 1% (mass percentage) of the amount of PTA, and ethylene glycol is used Antimony as a catalyst. The direct esterification reaction is carried out at 270-280°C, the by-product water and the remaining EG are distilled off, and the esterification reaction is completed in 2-3 hours. Start vacuuming to heat up. The polycondensation reaction is carried out at a vacuum degree of less than 100Pa and at a temperature of 270-280°C. 3 ~ 4hr polycondensation reaction ends. Control the intrinsic viscosity of the copolyester at 0.65±0.03 dl / g. The general properties of copolyesters are shown in Table 1.

Embodiment 2

[0024] On the 300L polymerization device, add PTA, IPA and EG into the polymerization kettle, the molar ratio of dibasic acid to dibasic alcohol is 1:1.39, the amount of IPA added is 2% (mass percentage) of the amount of PTA, and ethylene glycol is used Antimony as a catalyst. The direct esterification reaction is carried out at 270-280°C, the by-product water and the remaining EG are distilled off, and the esterification reaction is completed in 2-3 hours. Start vacuuming to heat up. The polycondensation reaction is carried out at a vacuum degree of less than 100Pa and at a temperature of 270-280°C. 3 ~ 4hr polycondensation reaction ends. Control the intrinsic viscosity of the copolyester at 0.65±0.03 dl / g. The general properties of copolyesters are shown in Table 1.

Embodiment 3

[0026] On the 300L polymerization device, add PTA, IPA and EG into the polymerization tank, the molar ratio of dibasic acid to dibasic alcohol is 1:1.39, the amount of IPA added is 3% (mass percentage) of the amount of PTA, and ethylene glycol is used Antimony as a catalyst. The direct esterification reaction is carried out at 270-280°C, the by-product water and the remaining EG are distilled off, and the esterification reaction is completed in 2-3 hours. Start vacuuming to heat up. The polycondensation reaction is carried out at a vacuum degree of less than 100Pa and at a temperature of 270-280°C. 3 ~ 4hr polycondensation reaction ends. Control the intrinsic viscosity of the copolyester at 0.65±0.03 dl / g. The general properties of copolyesters are shown in Table 1.

[0027] Table 1 General properties of copolyester chips.

[0028] Sample serial number Example 1 Example 2 Example 3 [COOH] (mol / t) 17.17 19.6 19.36 η (dl / g) 0.643 0.653 0.661 ...

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Abstract

The invention discloses a method for processing polyester staple fibers special for vortex spinning. According to the method, co-polyester is prepared by adopting a direct esterification method in the preparation process of the co-polyester, and the adopted raw materials include binary acid and diatomic alcohol. The method specifically comprises a step of esterification reaction and a step of condensation and polymerization reaction. Compared with the existing polyester staple fibers special for vortex spinning, the polyester staple fibers special for vortex spinning, used in the method disclosed by the invention, have reduced degree of crystallinity and fiber modulus; due to the reduction of the modulus and rigidity and the increase of softness of the fibers, when the polyester staple fibers are used as raw materials to perform production of pure-polyester vortex spinning or polyester-viscose blended vortex spinning, the hand feeling of yarns is effectively improved; meanwhile, the air pressure of a spinning nozzle can be reduced to ensure that the energy consumption is effectively reduced; moreover, the quality of untwisting and knotting after cutting by an electronic yarn clearer on vortex spinning equipment is improved, the quality of vortex spinning yarns and the quality of a fabric of the yarns are further improved, and requirements of users are met.

Description

technical field [0001] The invention relates to a method for preparing polyester fibers, in particular to a method for processing polyester staple fibers specially used for vortex spinning. Background technique [0002] At the end of the 1980s, the vortex spinning was first launched by the Japanese Murata Company and sold to the global market. At present, the Murata No.861 machine still dominates the global vortex spinning market. In the past 20 years, nearly 400 units have been sold worldwide ( 80 spindles each). In the past 1-2 years, domestic vortex spinning has developed rapidly. In March 2009, Zhonghui Textile Company took the lead in introducing the first No.861 vortex spinning machine, and its high-grade knitting yarn products were quickly recognized by the market. 6~9 Seven Zhejiang enterprises, including Hongyang, have signed contracts to import more than 100 units, 90% of which are concentrated in Xiaoshan District, Hangzhou, and have been put into production befo...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183
Inventor 史利梅吕洪谢宏
Owner CHINA PETROLEUM & CHEM CORP
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