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A kind of low-chromatic-difference polyester imitation linen type differential shrinkage composite yarn and its preparation method

A composite yarn and differential shrinkage technology, which is applied in the directions of melt spinning, filament/thread forming, yarn, etc., can solve the problems of increased air content in PET differential shrinkage blended composite yarn fabrics.

Active Publication Date: 2018-01-19
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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of low-chromatic-difference polyester imitation linen type differential shrinkage composite yarn and its preparation method
  • A kind of low-chromatic-difference polyester imitation linen type differential shrinkage composite yarn and its preparation method
  • A kind of low-chromatic-difference polyester imitation linen type differential shrinkage composite yarn and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] A method for preparing low-chromatic-difference polyester imitation linen-type different-shrinkage composite yarn, the main process includes:

[0088] (1) Preparation of catalyst magnesium ethylene glycol:

[0089] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 6V, the cathode current density is 150mA, and electrolyze for 10 hours at 50°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;

[0090] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0091] Esterification reaction:

[0092] Use terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, add anti-eth...

Embodiment 2

[0126] A method for preparing low-chromatic-difference polyester imitation linen-type different-shrinkage composite yarn, the main process includes:

[0127] (1) Preparation of catalyst magnesium ethylene glycol:

[0128] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 10V, the cathode current density is 200mA, electrolyze at 60°C for 12 hours, after the electrolysis ends Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;

[0129] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0130] Esterification reaction:

[0131] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic ...

Embodiment 3

[0165] A method for preparing low-chromatic-difference polyester imitation linen-type different-shrinkage composite yarn, the main process includes:

[0166] (1) Preparation of catalyst magnesium ethylene glycol:

[0167] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 7V, the cathode current density is 160mA, and electrolyze for 11 hours at 55°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;

[0168] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:

[0169] Esterification reaction:

[0170] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.5:1, adding ant...

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Abstract

The invention relates to a low-aberration polyester flax-like differential-shrinkage composite filament and a preparation method thereof. The composite filament is formed by blending low-aberration polyester pre-oriented yarn (POY) with low-aberration polyester fully drawn yarn (FDY), and the low-aberration polyester POY forms small loops to surround the low-aberration polyester FDY; the low-aberration polyester POY and the low-aberration polyester FDY are formed by dissolving, washing and spinning polyester, and the composite filament has the breaking strength larger than or equal to 3.0 cN / dtex, the elongation at break of 40.0+ / -3.0%, the crimp contraction of 2.50+ / -3.0%, the network degree of 95+ / -5 pieces per meter, and the aberration delta E smaller than 0.200. Magnesium ethanediol in the filament is mild and has a quite small thermal degradation coefficient, low polymers are reduced in the polymerization process and are further reduced in the dissolving and washing process, so the number of low polymers transferring from inside to outside of fiber is decreased during polyester fiber dyeing and post-processing heat setting, color sports and strip patterns are reduced, and the fiber leveling property and crockfastness are ensured.

Description

technical field [0001] The invention belongs to the technical field of polyester preparation, and relates to a low-chromatic-difference polyester imitation hemp-type different-shrinkage composite yarn and a preparation method thereof, in particular to a polycondensation catalyst using a mixture of ethylene glycol magnesium and ethylene glycol antimony and polyester chips Low-color-difference polyester hemp-like different shrinkage composite yarn boiled and washed under the conditions of 120-130 DEG C and 0.2-0.3 MPa with water and solvent washing agent and its preparation method. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent properties. PET is widely used for its high modulus, high strength, crispness, good shape retention, purity and hygiene, and good barrier properties. In the fields of fiber, bottle packaging, film and sheet, etc., the output is increasing year by year, and the industry status has been significantly improved. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D02G3/02D01D5/08D01D5/088C08G63/183C08G63/83C08G63/86
CPCC08G63/183C08G63/83C08G63/866D01D5/08D01D5/088D02G3/02D10B2331/04
Inventor 马文平沈建根张学东晏金龙
Owner JIANGSU HENGLI CHEM FIBER
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