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A high-modulus low-shrinkage activated polyester industrial yarn and its preparation method

A high modulus, low shrinkage, industrial yarn technology, applied in the field of polyester fibers, can solve the problems of delamination and short life, and achieve the effects of improving reactivity, enhancing polarity and improving use efficiency

Active Publication Date: 2016-08-17
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the smooth surface of polyester and few surface active groups, although the activation is effective, there is a serious delamination phenomenon between polyester industrial yarn and rubber, and the service life is short.

Method used

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  • A high-modulus low-shrinkage activated polyester industrial yarn and its preparation method
  • A high-modulus low-shrinkage activated polyester industrial yarn and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A preparation method of high-modulus low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0071] (1) Preparation of amino fatty acid ethylene glycol ester:

[0072] 1) Add dodecanedicarboxylic acid and methanol into the reactor at a molar ratio of 1:1.5, heat to 80°C under the catalysis of concentrated sulfuric acid, reflux for esterification, cool, separate and purify to obtain dodecanedicarboxylic acid Acid monomethyl ester; Described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of dodecane dicarboxylic acid;

[0073] 2) Dissolve the monomethyl dodecanedicarboxylate, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the monomethyl dodecanedicarboxylate concentration is 0.05mol / L , under a nitrogen atmosphere, react at 80 ° C, reflux, when no more gas is produced, add a certain amount of dilute sulfuric acid to react f...

Embodiment 2

[0096] A preparation method of high-modulus low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0097] (1) Preparation of amino fatty acid ethylene glycol ester:

[0098] 1) Add pentacodecanedicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, under the catalysis of concentrated sulfuric acid, heat to 110°C, reflux for esterification, cool, separate and purify to obtain pentacodecane Dicarboxylic acid monomethyl ester; Described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of pentacosane dicarboxylic acid;

[0099] 2) The monomethyl pentacodecanedicarboxylate, lead tetraacetate and lithium bromide are dissolved in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl pentacodecanedicarboxylate is 0.07mol / L, under nitrogen atmosphere, react at 85°C, reflux, when no more gas is generated, add a certain amount of dilut...

Embodiment 3

[0121] A preparation method of high-modulus low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0122] (1) Preparation of amino fatty acid ethylene glycol ester:

[0123] 1) Add pentadecanedicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, under the catalysis of concentrated sulfuric acid, heat to 85°C, reflux for esterification, cool, separate and purify to obtain pentadecanedicarboxylic acid acid monomethyl ester; described concentrated sulfuric acid refers to the sulfuric acid that mass concentration is 70%, and the concentrated sulfuric acid add-on is 3wt% of pentadecanedicarboxylic acid;

[0124] 2) Dissolve the monomethyl pentadecanedicarboxylate, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl pentadecanedicarboxylate is 0.08mol / L , under nitrogen atmosphere, react at 90°C, reflux, when no more gas is produced, add a certain amount of dilute sulfuric a...

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Abstract

The invention relates to a high-modulus and low-shrinkage type activated polyester industry yarn and a preparation method thereof. The high-modulus and low-shrinkage type activated polyester industry yarn is prepared from modified polyester, the modified polyester is composed of polyester and aminoadipic acid gylcol ester, the aminoadipic acid gylcol ester is dispersed among molecular chains of the polyester, hydrogen-bond interaction exists between the aminoadipic acid gylcol ester and the molecular chains of the polyester, and the relative position of the aminoadipic acid gylcol ester and the molecular chains of the polyester is fixed; the free volume space among the molecular chains inside the fibers is increased by 10-15v / v% when the high-modulus and low-shrinkage type activated polyester industry yarn is at 70-80 DEG C, a part of activating agent molecules are dispersed into fiber gaps, more -OHs and -NHs with strong activity are introduced, and the reactivity of the polyester fiber is improved; and the high-modulus and low-shrinkage type activated polyester industry yarn can be applied to light trucks, canvas conveyer belts and the like.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a high-modulus and low-shrinkage activated polyester industrial yarn and a preparation method thereof. Background technique [0002] Since its appearance, polyethylene terephthalate (PET) fiber has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fibers in the world. Polyester fiber has a series of excellent properties such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance, corrosion resistance, etc. Therefore, polyester fiber is widely used in clothing, industrial yarn and other fields. [0003] PET is a symmetrical linear macromolecule, the molecular chain does not contain side chain groups, and its regularity is very good. Its main chain contains a rigid benzene ring and a flexible hydrocarbon gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/86D01D5/08D01D5/088D01D7/00
Inventor 范晓兵张耀鹏杨大矛宋光坤赵溵来赵慧荣王丽丽刘亚涛蔡明建
Owner JIANGSU HENGLI CHEM FIBER
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