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Polyester paralleling composite yarn and prepared method thereof

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

Active Publication Date: 2015-04-08
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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  • Polyester paralleling composite yarn and prepared method thereof
  • Polyester paralleling composite yarn and prepared method thereof

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preparation example Construction

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

[0071] In the method for preparing a polyester parallel composite yarn as described above, the weight ratio of PBT to PET in the composite yarn 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 a high temperature and high pressure machine. Before dyeing, the fiber was treated with a nonionic surfactant at 60°C for 30 minutes. The amount of dye is 2.0% (owf); dispersant NNO is 1.2g / L, pH value is 5, bath ratio is 1:50, 60℃ human dyeing, heating to 90℃, 100℃, 110℃, 120℃ each constant temperature dyeing 1h.

[0073] The percentage of dye uptake is determined by the residual liquid colorimetric method. The appropriate amount of dy...

Embodiment 1

[0077] A preparation method of polyester parallel composite yarn, including the following steps:

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

[0079] 1) Add dodecane dicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, heated to 80°C under the catalysis of concentrated sulfuric acid, reflux esterification, cooling, separation and purification to obtain dodecane dicarboxylic acid Monomethyl acid; the concentrated sulfuric acid refers to sulfuric acid with a mass concentration of 70%, and the added amount of concentrated sulfuric acid is 3wt% of dodecane dicarboxylic acid;

[0080] 2) The monomethyl dodecane dicarboxylate, lead tetraacetate and lithium bromide are dissolved in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl dodecane dicarboxylate is 0.05 mol / L , In a nitrogen atmosphere, react at 80°C and reflux. When no more gas is generated, add a certain amount of dilute sulfuric acid to react for 2 hours, then wash, purify ...

Embodiment 2

[0103] A preparation method of polyester parallel composite yarn, including the following steps:

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

[0105] 1) Put penictodecane dicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, catalyzed by concentrated sulfuric acid, heated to 110°C, refluxed for esterification, cooled, and separated and purified to obtain penicodecane Monomethyl dicarboxylate; the concentrated sulfuric acid refers to sulfuric acid with a mass concentration of 70%, and the added amount of concentrated sulfuric acid is 3wt% of Pentadodecane dicarboxylic acid;

[0106] 2) Dissolve the pentadodecane dicarboxylic acid monomethyl ester, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the concentration of pentadodecane dicarboxylic acid monomethyl ester is 0.07 mol / L, under nitrogen atmosphere, react at 85℃, reflux, when no more gas is generated, add a certain amount of dilute sulfuric acid to react for 3 ho...

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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 technical field of fibers, and relates to a polyester parallel composite yarn and a preparation method thereof. Background technique [0002] Since the advent of polyethylene terephthalate (PET) fiber, it has developed rapidly due to its excellent properties, and its output has become the world's top synthetic fiber. Polyester fiber has a series of excellent properties such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat and light resistance, acid and alkali resistance and corrosion resistance, and the fabric has the advantages of wrinkle resistance and good stiffness, so , Polyester fiber is 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 has very good regularity. Its main chain contains a rigid benzene ring and a flexible hydrocarbon group, and the ester gr...

Claims

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Application Information

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Patent Type & Authority Applications(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
Owner JIANGSU HENGLI CHEM FIBER
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