Dyed polyester FDY fiber and preparation method thereof

A technology for modifying polyester and polyester, which is applied in fiber treatment, single-component polyester rayon, spinneret assemblies, etc. Oligomers and other problems, to achieve the effect of excellent performance

Active Publication Date: 2018-08-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 met

Method used

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  • Dyed polyester FDY fiber and preparation method thereof
  • Dyed polyester FDY fiber and preparation method thereof
  • Dyed polyester FDY fiber and preparation method thereof

Examples

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Comparison scheme
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Example Embodiment

[0071] Example 1

[0072] A preparation method of polyester FDY fiber, the specific steps are as follows:

[0073] (1) Preparation of modified polyester:

[0074] (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, 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 ...

Example Embodiment

[0080] Example 2

[0081] A preparation method of polyester FDY fiber, the specific steps are as follows:

[0082] (1) Preparation of modified polyester:

[0083] (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, 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 ...

Example Embodiment

[0088] Example 3

[0089] A preparation method of polyester FDY fiber, the specific steps are as follows:

[0090] (1) Preparation of modified polyester:

[0091] (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-but...

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Abstract

The invention relates to polyester FDY fiber and a preparation method thereof. The preparation method comprises: metering a modified polyester melt, extruding, cooling, oiling, drawing, carrying out heat setting, and winding to prepare the polyester FDY fiber, wherein the unchanged longitudinal height is maintained during the cooling, the cross section area of the slow cooling chamber is increasedwhile the plate surface temperature of the spinning plate is maintained by using the thermal insulation method. According to the present invention, 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 formulaof 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 atom number 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 prepared fiber has excellent performance.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a polyester FDY 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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IPC IPC(8): D01F6/92C08G63/86C08G63/183D01D4/02D01D5/088
CPCC08G63/183C08G63/866D01D4/02D01D5/088D01F6/92
Inventor 王丽丽王永锋张建光丁竹君王建根
Owner JIANGSU HENGLI CHEM FIBER
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