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Polyester HOY (High-Oriented Fibre) and preparation method thereof

A HOY, fiber technology, applied in the field of polyester HOY fiber and its preparation, can solve the problems of polyester fiber coloring difficulty, polyester dyeing difficulty, poor hygroscopicity, etc., to shorten the dyeing time, reduce energy consumption, and reduce dyeing costs. effect of temperature

Active Publication Date: 2019-04-23
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.
Because there is no hydrophilic group in its molecule, its hygroscopicity is very poor, which makes it difficult to dye polyester

Method used

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  • Polyester HOY (High-Oriented Fibre) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of polyester HOY fiber, the steps are as follows:

[0041] (1) prepare modified polyester;

[0042] (1.1) Esterification reaction;

[0043] Make a slurry of terephthalic acid, ethylene glycol, and dimethylsilanediol, add antimony trioxide, titanium dioxide, and triphenyl phosphate and mix evenly, pressurize in a nitrogen atmosphere for esterification, pressurize The pressure is 0.3MPa, the temperature of the esterification reaction is 250°C, when the amount of water distilled in the esterification reaction reaches 95% of the theoretical value, it is the end point of the esterification reaction, and the molar ratio of phthalic acid to ethylene glycol is 1: 1.2, the addition of dimethylsilanediol is 3mol% of the addition of terephthalic acid, the addition of antimony trioxide, titanium dioxide and triphenyl phosphate is 0.03wt%, 0.22wt% of the addition of terephthalic acid wt% and 0.02wt%;

[0044] (1.2) polycondensation reaction;

[0045] After t...

Embodiment 2

[0058] A preparation method of polyester HOY fiber, the steps are as follows:

[0059] (1) prepare modified polyester;

[0060] (1.1) Esterification reaction;

[0061] Make a slurry of terephthalic acid, ethylene glycol, and dimethyldiphenyldisiloxane diol, add antimony trioxide, titanium dioxide, and trimethyl phosphate, mix evenly, and pressurize in a nitrogen atmosphere. For esterification reaction, the pressurized pressure is 0.2MPa, and the temperature of the esterification reaction is 252°C. When the amount of water distilled in the esterification reaction reaches 90% of the theoretical value, it is the end point of the esterification reaction. Among them, phthalic acid and ethylene glycol The molar ratio of alcohol is 1:1.5, the addition of dimethyl diphenyl disiloxane diol is 3.2mol% of the addition of terephthalic acid, the addition of antimony trioxide, titanium dioxide and trimethyl phosphate Respectively 0.04wt%, 0.20wt% and 0.04wt% of the amount of terephthalic ...

Embodiment 3

[0071] A preparation method of polyester HOY fiber, the steps are as follows:

[0072] (1) prepare modified polyester;

[0073] (1.1) Esterification reaction;

[0074] Make a slurry of terephthalic acid, ethylene glycol, and tetramethyldisiloxane diol, add ethylene glycol antimony, titanium dioxide, and trimethyl phosphite, mix evenly, and pressurize in a nitrogen atmosphere for esterification Reaction, pressurized pressure is 0.1MPa, the temperature of esterification reaction is 255 ℃, when the amount of water distilled in the esterification reaction reaches 92% of the theoretical value, it is the end point of the esterification reaction, wherein the phthalic acid and ethylene glycol The molar ratio is 1:1.3, the addition amount of tetramethyldisiloxane diol is 3.5mol% of the addition amount of terephthalic acid, the addition amount of ethylene glycol antimony, titanium dioxide and trimethyl phosphite is respectively 0.05wt%, 0.24wt% and 0.01wt% of the amount of diformic ac...

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Abstract

The invention relates to a polyester HOY (High-Oriented Fibre) and a preparation method thereof. The preparation method comprises the following steps of: after terephthalic acid, ethylene glycol and dihydric alcohol of which the main chain contains silicone are uniformly mixed, performing esterification reaction and condensation polymerization reaction in sequence to obtain modified polyester; andthen, preparing a modified polyester HOY fibre from a modified polyester melt according to an HOY process. The finally prepared polyester HOY fibre has the dyeing rate of 88.3 to 94.6 percent under the temperature condition of 120 DEG C and the K / S value of 23.15 to 25.7; the fastness to soaping reaches level 5; the dry rubbing fastness reaches level 5; and the wet rubbing fastness is greater than level 4. The preparation method provided by the invention is simple in process and low in cost; and by introducing the dihydric alcohol polyester of which the main chain contains the silicone into the polyester, the dyeing temperature is reduced, the dyeing time is shortened, the dyeing rate of the fibre is improved, the energy consumption is reduced, meanwhile, the spinnability is improved, andthe dyeing performance of the prepared product is good.

Description

technical field [0001] The invention belongs to the field of synthetic fibers and relates to a polyester HOY fiber and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent properties. PET is widely used in fibers, bottles because of its advantages such as high modulus, high strength, good shape retention and good barrier properties. In the fields of packaging, film and sheet materials, the output is increasing year by year, and the industry status has been significantly improved. [0003] PET is a symmetrical linear macromolecule, the molecular chain does not contain side chain groups, and the regularity is very good. The glass transition temperature of this structure is high, and it needs to be dyed at a very high temperature to promote the dye molecules to the inside of the fiber. diffusion. In addition, PET has regular molecular chains, good crystallinity, tightly arranged molecular chains, and no polar...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/695C08G63/78
CPCC08G63/6956C08G63/78D01F1/10D01F6/92
Inventor 范红卫王丽丽王山水
Owner JIANGSU HENGLI CHEM FIBER
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