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A kind of polyester poy fiber and preparation method thereof

A fiber and polyester technology, which is applied in the field of polyester POY fiber and its preparation, can solve the problems of adverse effects on polyester performance, cannot significantly reduce cyclic oligomers in polyester, etc., and achieves 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 poy fiber and preparation method thereof
  • A kind of polyester poy fiber and preparation method thereof
  • A kind of polyester poy fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A preparation method of polyester POY fiber, the specific steps are as follows:

[0069] (1) Preparation of modified polyester:

[0070] (a) Esterification reaction; mix terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 into a slurry, and add antimony trioxide , Titanium dioxide and triphenyl phosphate are mixed uniformly, pressurized in a nitrogen atmosphere to carry out the esterification reaction, the pressure is normal pressure, the temperature of the esterification reaction is 250 ℃, 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, where the addition of antimony trioxide is 0.01% by weight of terephthalic acid, the addition of titanium dioxide is 0.20% by weight of terephthalic acid, and the addition of triphenyl phosphate It is 0.05% by weight of terephthalic acid. The structural formula of 2-ethyl-2-methyl-1,3...

Embodiment 2

[0077] A preparation method of polyester POY fiber, the specific steps are as follows:

[0078] (1) Preparation of modified polyester:

[0079] (a) Esterification reaction; mix terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol with a molar ratio of 1:1.3:0.04 into a slurry, and add ethylene glycol antimony and titanium dioxide After mixing with trimethyl phosphate uniformly, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressure is normal pressure, and the temperature of the esterification reaction is 260℃. When the amount of water distilled in the esterification reaction reaches the theoretical value 91% is the end point of the esterification reaction, where the addition of ethylene glycol antimony is 0.02% by weight of terephthalic acid, the addition of titanium dioxide is 0.21% by weight of terephthalic acid, and the addition of trimethyl phosphate is about 0.03% by weight of phthalic acid, of which the structural formu...

Embodiment 3

[0085] A preparation method of polyester POY fiber, the specific steps are as follows:

[0086] (1) Preparation of modified polyester:

[0087] (a) Esterification reaction; mix terephthalic acid, ethylene glycol and 2-butyl-2-ethyl-1,3-propanediol with a molar ratio of 1:1.4:0.05 into a slurry, and add antimony acetate and titanium dioxide After mixing with trimethyl phosphite uniformly, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressure is 0.1MPa and the temperature of the esterification reaction is 252°C. When the amount of water distilled in the esterification reaction reaches the theoretical value 92% is the end point of the esterification reaction. The addition of antimony acetate is 0.03% by weight of terephthalic acid, the addition of titanium dioxide is 0.23% by weight of terephthalic acid, and the addition of trimethyl phosphite is for 0.01% by weight of phthalic acid, of which the structural formula of 2-butyl-2-ethyl-1,3-pro...

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Abstract

The invention relates to polyester DTY fiber and a preparation method thereof. The preparation method comprises: metering a modified polyester melt, extruding, cooling, oiling, and winding to preparethe polyester POY fiber. According to the present invention, during the cooling, the longitudinal height is maintained, and the cross section area of the slow cooling chamber is increased while the plate surface temperature of the spinning plate is maintained by using the thermal insulation method; the material of the fiber is the modified polyester, the molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment having the branched chain, the structure formula of the diol chain segment having the branched chain is defined in the specification, R1 and R2 are respectively and independently selected from straight chain alkylidene with a carbon atom number of 1-3, R3 is selected from alkyl with a carbon atomnumber of 1-5, and R4 is selected from alkyl with a carbon atom number of 2-5; the chromatic aberration [delta]E of the prepared fiber is less than 0.200; and the preparation process is simple and reasonable, and the obtained fiber has excellent performance.

Description

Technical field [0001] The invention belongs to the field of fiber preparation, and relates to a polyester POY fiber and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent performance. Because of its high modulus, high strength, good shape retention and good barrier properties, PET is widely used in fibers and bottles. In the fields of packaging, film and sheet materials, the output has been increasing year by year, and the industry status has been significantly improved. [0003] However, in the process of the polycondensation reaction of synthesizing ethylene terephthalate, especially in the production of linear polymers, linear and cyclic oligomers are also associated with high temperature oxidative degradation. Cyclic oligomers are polycondensed. The stage is formed due to the biting of the macromolecular chain ends. About 70% of the cyclic oligomers are cyclic trimers. The cyclic trimers are easy to aggrega...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84D01F11/08C08G63/183C08G63/78D01D1/09D01D5/088
CPCC08G63/183C08G63/78D01D1/09D01D5/088D01F6/84D01F11/08
Inventor 李文刚熊克刘灯胜张元华
Owner JIANGSU HENGLI CHEM FIBER