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A kind of hemp-like different shrinkage composite yarn and its preparation method

A technology of different shrinkage and composite yarn, which is applied in the field of fiber manufacturing, can solve the problems of increased air content in PET differential shrinkage mixed fiber composite yarn fabrics, etc.

Active Publication Date: 2016-10-05
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased air content in PET different shrinkage blended composite silk fabrics

Method used

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  • A kind of hemp-like different shrinkage composite yarn and its preparation method
  • A kind of hemp-like different shrinkage composite yarn and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] A preparation method of hemp-like different shrinkage composite yarn, comprising the following steps:

[0092] (1) Preparation of amino fatty acid ethylene glycol ester:

[0093] 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;

[0094] 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, then w...

Embodiment 2

[0139] A preparation method of hemp-like different shrinkage composite yarn, comprising the following steps:

[0140] (1) Preparation of amino fatty acid ethylene glycol ester:

[0141] 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;

[0142] 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 acid to...

Embodiment 3

[0187] A preparation method of hemp-like different shrinkage composite yarn, comprising the following steps:

[0188] (1) Preparation of amino fatty acid ethylene glycol ester:

[0189] 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;

[0190] 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 for 2...

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Abstract

The invention relates to a linen-like type differential shrinkage composite filament and a preparation method thereof. The linen-like type differential shrinkage composite filament is a composite filament prepared from modified polyester POY filaments and modified polyester FDY filaments which are subjected to fiber mixing processing; the breakage elongation of the linen-like type differential shrinkage composite filament is 40.0+ / -3.0%, the network degree of the linen-like type differential shrinkage composite filament is 95+ / -5 piece / m; the modified polyester consists of polyester and amino fatty acid gylcol ester; the amino fatty acid gylcol ester is dispersed among the molecular chains of the polyester and has a hydrogen bonding function with the molecular chains of the polyester, so that the relative positions of the amino fatty acid gylcol ester and the molecular chains of the polyester are fixed; under the condition that the temperature is 90-130 DEG C, the free volume space among the molecular chains of fiber of the linen-like type differential shrinkage composite filament is increased by 20-30v / v%. Due to adoption of the aliphatic ester, the free volume of the polyester fiber is increased, so that the diffusion degree of dye is increased, and the dyeing property of the polyester fiber is improved. The linen-like type differential shrinkage composite filament can be used in the industries such as high-class woof fabrics and clothes.

Description

technical field [0001] The invention belongs to the technical field of fiber manufacturing, and relates to a hemp-like different shrinkage composite 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 and corrosion resistance, and the fabric has the advantages of wrinkle resistance and good stiffness, so , Polyester fibers are widely used in clothing, home textiles 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14C08G63/685C08G63/183C08G63/78C07C227/18C07C229/08D06P1/16D06P3/54D01D5/08D01D5/088D01D5/16D01D10/02D01D7/00
Inventor 沈建根简维权马文平张学东杨超明
Owner JIANGSU HENGLI CHEM FIBER
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