A kind of ultra-bright three-lobed special-shaped FDY fiber and its preparation method

A special-shaped and bright technology, applied in the field of polyester fiber, can solve the problems of destroying the regularity of the chain segment, the difficulty of coloring polyester fiber, and the difficulty of dyeing PET fiber.

Active Publication Date: 2016-05-11
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the molecular chain of PET is regular, the crystallinity is good, the molecular chain is closely arranged, and there is no polar group that interacts with the dye molecule on the molecular chain, which makes the coloring of polyester fiber more difficult.
[0004] In order to solve the problem of PET fiber dyeing difficulties, the current technology or method is mainly through the introduction of dye molecule acceptors or the method of increasing the amount of polyester amorphous regions. Although the dyeing performance of polyester can be improved, the chain segment regularity of PET is destroyed. , in order to reduce the performance of polyester fiber to obtain the improvement of dyeing performance

Method used

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  • A kind of ultra-bright three-lobed special-shaped FDY fiber and its preparation method
  • A kind of ultra-bright three-lobed special-shaped FDY fiber and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0073] A preparation method of ultra-bright three-lobed special-shaped FDY fiber, comprising the following steps:

[0074] (1) Preparation of amino fatty acid ethylene glycol ester:

[0075] 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;

[0076] 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

[0099] A preparation method of ultra-bright three-lobed special-shaped FDY fiber, comprising the following steps:

[0100] (1) Preparation of amino fatty acid ethylene glycol ester:

[0101] 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;

[0102] 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

[0125] A preparation method of ultra-bright three-lobed special-shaped FDY fiber, comprising the following steps:

[0126] (1) Preparation of amino fatty acid ethylene glycol ester:

[0127] 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;

[0128] 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 super-bright light trefoil irregular FDY fiber and a preparation method thereof. The super-bright light trefoil irregular FDY fiber is made of modified polyester and is manufactured by spinning the modified polyester by using a trefoil irregular spinneret plate of which the spinneret orifice has a Y-shaped structure; 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 chains of the amino fatty acid gylcol ester and the polyester are fixed; under the condition of 90-130 DEG C, the free volume space of a part of the molecular chains inside the super-bright light trefoil irregular FDY fiber is increased by 20-30v/v%. Under the condition that identical pigment such as disperse red 3B is used, the super-bright light trefoil irregular FDY fiber has a dyeing rate which is much higher than that of ordinary fiber, and color flooding is reduced after dyeing. The super-bright light trefoil irregular FDY fiber can be used in fields such as woven satin fabrics and imitated silk fabrics.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a super-bright three-lobed special-shaped FDY fiber 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/78D01D5/253C07C227/18C07C229/08
Inventor 王山水熊克张建光汤方明张烨邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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