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A kind of polyester hoy fiber and preparation method thereof

A HOY and fiber technology, applied in the field of polyester HOY fiber and its preparation, can solve the problems of adverse effects on polyester performance, can not significantly reduce cyclic oligomers in polyester, etc., and achieve the effect of excellent performance

Active Publication Date: 2020-04-17
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the above-mentioned prior art cannot significantly reduce the content of cyclic oligomers in polyester and will adversely affect the performance of polyester itself, and provide a method that can significantly reduce the content of cyclic oligomers in polyester. The content of polymer can effectively improve the preparation method of polyester fiber, mainly by adding a branched diol with a specific structure to the polyester raw material.

Method used

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  • A kind of polyester hoy fiber and preparation method thereof
  • A kind of polyester hoy fiber and preparation method thereof
  • A kind of polyester hoy fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A kind of preparation method of polyester HOY fiber, concrete steps are as follows:

[0069] (1) Preparation of modified polyester:

[0070] (a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added , titanium dioxide and triphenyl phosphate are evenly mixed, pressurized in a nitrogen atmosphere for esterification reaction, the pressurized pressure is normal pressure, the temperature of the esterification reaction is 250 ° C, when the amount of water distilled in the esterification reaction reaches the theoretical 90% of the value is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate It is 0.05% of the weight of terephthalic acid, wherein the str...

Embodiment 2

[0077] A kind of preparation method of polyester HOY fiber, concrete steps are as follows:

[0078] (1) Preparation of modified polyester:

[0079] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add ethylene glycol antimony, titanium dioxide After mixing evenly with trimethyl phosphate, carry out the esterification reaction under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. 91% is the end point of the esterification reaction, wherein the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of titanium dioxide is 0.21% of the weight of terephthalic acid, and the addition of trimethyl phosphate is 0.02% of the weight of terephthalic acid. 0.03% by weight of phthalic acid, wherein the structural formula of 2,2-diethyl-1,3-propanediol is as fo...

Embodiment 3

[0086] A kind of preparation method of polyester HOY fiber, concrete steps are as follows:

[0087] (1) Preparation of modified polyester:

[0088] (a) Esterification reaction: terephthalic acid, ethylene glycol, and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and titanium dioxide are added After mixing evenly with trimethyl phosphite, carry out esterification reaction under pressure in a nitrogen atmosphere. 92% is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.03% of the weight of terephthalic acid. 0.01% by weight of phthalic acid, wherein the structural formula of 2-butyl-2-ethyl-1,3-propanediol is as follows:

[0089]

[0090] (b) polycondensation reaction; after the esterification reaction ends, sta...

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Abstract

The invention relates to polyester HOY fibers and a preparation method thereof. The preparation method comprises the steps of carrying out metering, extrusion, cooling, oiling and high-speed winding of a modified polyester melt to obtain the polyester HOY fibers, wherein the high-speed winding speed of the high-speed winding is more than or equal to 6000 m / min; during cooling, the vertical heightis kept unchanged and the cross section area of a slow cooling chamber is increased; at the same time, the slow cooling chamber maintains the plate surface temperature of a spinneret plate by the wayof heat preservation. The fibers are made of modified polyester having a molecular chain including a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment with a branched chain, and diol with the branched chain has the structural formula described in the specification, wherein R1 and R2 are independently selected from straight-chain alkylene with the carbon atom number of 1-3 , R3 is selected from alkyl with the carbon atom number of 1-5, and R4 is selected from alkyl with the carbon atom number of 2-5; the chromatic aberration [delta]E of the prepared fibers is less than 0.200. The method is simple and reasonable in preparation process, and the prepared fibers have good properties.

Description

technical field [0001] The invention belongs to the field of fiber preparation, 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] However, during the polycondensation reaction of synthesizing ethylene terephthalate, especially when producing linear high polymers, linear and cyclic oligomers are also accompanied by high-temperature oxidative degradation, and cyclic oligomers are polycondensed The stage is formed due to the back-biting and cyclization of the macromolecular chain ends. More than 70% of the cyclic oligomers are cyclic trimers. The cycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92C08G63/183D01D5/088
CPCC08G63/183D01D5/088D01F6/92
Inventor 汤方明王雪邵义伟王建根晏金龙
Owner JIANGSU HENGLI CHEM FIBER
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