Method for preparing 1,3-propanediol modified terylene chips

A technology of polyester chips and propylene glycol, applied in the direction of single-component polyester rayon, etc., can solve the problems of low heat shrinkage and high crystallinity, and achieve the effects of uniform dyeing, stable melt quality and low production cost

Inactive Publication Date: 2012-01-25
JIANGSU YINGXIANG FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] Conventional polyester fibers have high crystallinity and low heat shrinkage, generally less than 10%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] First, on the continuous polyester equipment, the monomers of terephthalic acid (PTA), 1,3-propanediol and ethylene glycol (EG) are mixed according to the The molar ratio of (EG) monomers is 1:0.08:1.15, each of which is continuously and stably metered and added to the slurry tank for beating, and p-toluenesulfonic acid and zinc acetate are added to the beating tank, and the amount of p-toluenesulfonic acid added The molar ratio to terephthalic acid is 0.01%, and the molar ratio of zinc acetate to phthalic acid is 0.03%;

[0055] Then the above-mentioned slurry is continuously and stably transported to the reaction kettles of esterification-I, esterification-II and esterification-III, and stabilizers are continuously added to the reaction kettles of esterification-III; Polycondensation and final polycondensation are improved 1. Modified polyester melt; the polyester melt is cast, pelletized, and dried to obtain modified polyester chips.

[0056] Wherein, the specific...

Embodiment 2

[0060] First, on the continuous polyester equipment, the monomers of terephthalic acid (PTA), 1,3-propanediol and ethylene glycol (EG) are mixed according to the The molar ratio of (EG) monomers is 1:0.18:1.18, each of which is continuously and stably metered and added to the slurry tank for beating, and p-toluenesulfonic acid and zinc acetate are added to the beating tank, and the amount of p-toluenesulfonic acid added The molar ratio to terephthalic acid is 0.015%, and the molar ratio of zinc acetate to phthalic acid is 0.05%;

[0061]Then the above-mentioned slurry is continuously and stably transported to the reaction kettles of esterification-I, esterification-II and esterification-III, and stabilizers are added to the reaction kettles of esterification-III; and final polycondensation to obtain a modified polyester melt; the polyester melt is cast, pelletized, and dried to obtain modified polyester chips.

[0062] Wherein, the specific esterification and polycondensation...

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Abstract

The invention relates to a method for preparing 1,3-propanediol modified terylene chips. The method comprises two steps of esterification and polycondensation. A melt prepared by the process has stable quality and the chips have high spinning performance; and the prepared high-shrinkage polyester staple fibers have high shrinkage stability, and are uniformly dyed and low in production cost.

Description

technical field [0001] The invention relates to a modified polyester slice, in particular, the invention relates to a preparation method of a 1,3-propanediol modified polyester slice. [0002] Background technique [0003] As one of the three main fibers in synthetic fibers, polyester is widely used in clothing fabrics and other non-clothing fields because of its excellent physical and chemical properties. [0004] Since its inception, polyester products have also been used by downstream users as the main textile raw material to weave various textiles due to their good drapability, high strength and crispness. [0005] With the globalization of the economy and the internationalization of the market, people's requirements for clothing are getting higher and higher. Not only must they be comfortable, but they must also be functional. There is a constant need to improve performance to meet weaving requirements. [0006] [0007] In the past ten years, my country's polyester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78D01F6/92D01F1/10
Inventor 沈家康钮真荣赵广兵
Owner JIANGSU YINGXIANG FIBER
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