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A kind of polyester side-by-side composite yarn and preparation method thereof

A composite yarn and polyester technology, applied in the field of fibers, can solve the problems of damaged composite yarn elasticity and insufficient dyeing.

Active Publication Date: 2016-09-21
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because the dyeing temperature of PBT is 10-20°C lower than that of PET, the difficulty is that if you choose low-temperature dyeing, the dyeing of PET will not be enough; if you choose high-temperature dyeing, the elasticity of the composite yarn will be damaged.

Method used

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  • A kind of polyester side-by-side composite yarn and preparation method thereof
  • A kind of polyester side-by-side composite yarn and preparation method thereof

Examples

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preparation example Construction

[0070] A method for preparing polyester side-by-side composite yarns as described above, the intrinsic viscosity [η] of the PBT slice is 1.10-1.30dl / g; the intrinsic viscosity [η] of the modified polyester PET slice is 0.64- 0.75dl / g;

[0071] According to the above-mentioned method for preparing polyester side-by-side composite yarns, the weight ratio of PBT and PET in the composite yarns is 4:6-6:4.

[0072] Dyeing method: the disperse dyes used for dyeing are disperse red 3B, disperse blue SE-2R disperse turquoise blue S-GL, and the fibers are dyed in high temperature and high pressure machine respectively. The fibers before dyeing were treated with nonionic surfactant at 60°C for 30 minutes. The amount of dyestuff is 2.0% (o.w.f); the dispersant NNO1.2g / L, the pH value is 5, the bath ratio is 1:50, dyed at 60°C, heated to 90°C, 100°C, 110°C, 120°C for constant temperature dyeing 1h.

[0073] The percentage of dyeing is determined by the residual liquid colorimetric meth...

Embodiment 1

[0077] A preparation method of polyester side-by-side composite yarn, comprising the following steps:

[0078] (1) Preparation of amino fatty acid ethylene glycol ester:

[0079] 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;

[0080] 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 wash, pu...

Embodiment 2

[0103] A preparation method of polyester side-by-side composite yarn, comprising the following steps:

[0104] (1) Preparation of amino fatty acid ethylene glycol ester:

[0105] 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;

[0106] 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 react ...

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Abstract

The invention relates to a polyester paralleling composite yarn. The polyester paralleling composite yarn is prepared from PBT (polybutylece terephthalate) and modified polyester PET (polyethylene terephthalate) chips through parallel composite spinning, wherein 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 20-30v / v% when the polyester of the polyester paralleling composite yarn is at 90-130 DEG C, the dying rate of the polyester paralleling composite yarn is higher than that of the common fiber when the polyester paralleling composite yarn adopts disperse red 3B and the like, less surface dyeing is formed after dyeing, and the polyester paralleling composite yarn has wide application prospect in the field of garment materials.

Description

technical field [0001] The invention belongs to the field of fiber technology, and relates to a polyester side-by-side 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 rigid benzene ring ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F1/10C08G63/183C08G63/86D01D5/08D01D5/088D01D7/00
Inventor 明丹刘文斌李文刚张富伟金管范任怀林邓丽娜王彦芳
Owner JIANGSU HENGLI CHEM FIBER
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