Polyester DTY fiber and preparation method thereof

A technology of polyester and fiber, which is applied in the field of polyester DTY fiber and its preparation, can solve the problems of not being able to significantly reduce the adverse effects of polyester and polyester performance, and achieve the effects of lowering temperature, prolonging the cleaning cycle and prolonging the length

Active Publication Date: 2018-08-10
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 prior art cannot significantly reduce the content of cyclic oligomers in polyester and will adversely affect the perform

Method used

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  • Polyester DTY fiber and preparation method thereof
  • Polyester DTY fiber and preparation method thereof
  • Polyester DTY fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] A preparation method of polyester DTY fiber, the specific steps are as follows:

[0077] (1) Preparation of modified polyester:

[0078] (a) Esterification reaction; mix terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol with 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, and 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, 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-meth...

Embodiment 2

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

[0086] (1) Preparation of modified polyester:

[0087] (a) Esterification reaction; mix terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in 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. The temperature of the esterification reaction is 260°C. 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 formula of...

Embodiment 3

[0094] A preparation method of polyester DTY fiber, the specific steps are as follows:

[0095] (1) Preparation of modified polyester:

[0096] (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 0.01% by weight of phthalic acid, of which the structural formula of 2-butyl-2-ethyl-1,3-propane...

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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, winding to prepare polyester POY fiber, and carrying out fiber conduction pipe, network, heating drawing, false twisting, heat setting and winding molding on the polyester POY fiber to obtain the polyester DTY 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 thespinning plate is maintained by using the thermal insulation method; the material of the polyester POY fiber is the modified polyester with the molecular chain including 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, R1and 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 atom number of 1-5, and R4 is selected fromalkyl with a carbon atom number of 2-5; and the preparation method is simple, and the chromatic aberration [delta]E of the prepared fiber is less than 0.200.

Description

Technical field [0001] The invention belongs to the field of fiber preparation, and relates to a polyester DTY fiber 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, high elastic modulus, moderate resilience, excellent heat setting performance, good heat and light resistance, acid and alkali resistance, and corrosion resistance, and the fabric prepared from it has wrinkle resistance It is widely used in the fields of fiber, bottle packaging, film and sheet material, and its output is increasing year by year, and its status in the industry has been significantly improved. [0003] However, in the process of the polycondensation reaction of synthesizing ethylene terephthalate, especially in the production of li...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/78C08G63/86D01D5/088D01D5/253D01D10/02
CPCC08G63/183C08G63/78C08G63/866D01D5/088D01D5/253D01D10/02D01F1/10D01F6/92
Inventor 杨超明沈建根马文平王锋宾
Owner JIANGSU HENGLI CHEM FIBER
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