Low-shrinkage type activated polyester industrial filament and preparation method thereof

A technology of industrial yarn and polyester, applied in the field of polyester fiber, can solve problems such as short lifespan and delamination, and achieve the effect of improving functionality, good compatibility, and increasing compatibility

Active Publication Date: 2015-04-01
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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  • Low-shrinkage type activated polyester industrial filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A preparation method of low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0068] (1) Preparation of amino fatty acid ethylene glycol ester:

[0069] 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;

[0070] 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 for 2 hours, t...

Embodiment 2

[0093] A preparation method of low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0094] (1) Preparation of amino fatty acid ethylene glycol ester:

[0095] 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;

[0096] 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 dilute sulfuric ac...

Embodiment 3

[0119] A preparation method of low-shrinkage activated polyester industrial yarn, comprising the following steps:

[0120] (1) Preparation of amino fatty acid ethylene glycol ester:

[0121] 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;

[0122] 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 acid to react ...

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Abstract

The invention relates to a low-shrinkage type activated polyester industrial filament and a preparation method thereof. The low-shrinkage type activated polyester industrial filament is made of modified polyester; the modified polyester consists of polyester and amino fatty acid gylcol ester; the amino fatty acid gylcol ester is dispersed among molecular chains of the polyester and has hydrogen-bond interaction to the polyester, so that the relative positions of the molecular chain of the amino fatty acid gylcol ester and the polyester are fixed; under the condition of 70-80 DEG C, the free volume space of a part of the molecular chains inside the low-shrinkage type activated polyester industrial filament is increased by 10-15v/v%, the breaking strength of the low-shrinkage type activated polyester industrial filament is greater than or equal to 7.6 cN/dtex, and the core absorption height is less than or equal to 5 mm. A part of molecules of an activating agent are diffused and enter fiber gaps, and more -OH and -NH with relatively high activity are introduced into polyester molecules, so that the reactivity of the polyester fiber is improved. The low-shrinkage type activated polyester industrial filament can be used in apron fabrics, radial tire builder fabrics, and the like.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a low-shrink 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 group, and the ester g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/80C07C227/18C07C229/08D01D5/08D01D5/088D01D5/096D01D7/00
Inventor 杨大矛赵慧荣张耀鹏宋光坤范晓兵蔡明建刘亚涛
Owner JIANGSU HENGLI CHEM FIBER
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