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A processing method of special polyester staple fiber for vortex spinning

A technology of polyester staple fiber and processing method, which is applied in the direction of single-component copolyester artificial filament, etc., to achieve the effect of soft hand feeling, reduced nozzle air pressure, and deep color

Active Publication Date: 2016-01-06
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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  • A processing method of special polyester staple fiber for vortex spinning
  • A processing method of special polyester staple fiber 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 tank, 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±0.03dl / 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±0.03dl / 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 kettle, 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±0.03dl / 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 processing method of polyester staple fiber specially used for vortex spinning, and a copolyester preparation process, which adopts a direct esterification method to prepare copolyester, and the raw materials used include dibasic acid and dibasic alcohol, specifically including esterification Reaction steps and polycondensation reaction steps. Compared with the existing polyester staple fiber for vortex spinning, the special polyester staple fiber for vortex spinning used in the method of the present invention has decreased crystallinity and reduced modulus of the fiber; due to the reduced modulus of the fiber, the rigidity of the fiber has decreased and the softness has been improved. In the production of pure polyester vortex spinning or polyester-viscose blended vortex spinning with it as raw material, the hand feel of the yarn can be effectively improved; at the same time, the air pressure of the spinning nozzle can be reduced, which effectively reduces energy consumption; and improves the vortex spinning The quality of untwisting and knotting after cutting by the electronic yarn clearer on the equipment further improves the quality of the vortex spinning yarn and its fabric quality to meet the needs of users.

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