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Low-shrinkage polyester industrial filament and preparation method thereof

A low-shrinkage, industrial yarn technology, applied in the direction of single-component copolyester rayon, synthetic polymer rayon chemical post-treatment, filament/thread forming, etc., can solve the problem of low oligomer content, fiber Problems such as uneven spinneret and oligomer affecting fiber quality

Active Publication Date: 2018-06-08
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the oil agent in the prior art volatilizes quickly and is easy to bond on the surface of the fiber, which causes uneven fiber and too many residual oligomers in the spinneret affect the quality of the fiber, and provides a spinning Uniform low-shrinkage polyester industrial yarn with low oligomer content and preparation method thereof

Method used

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  • Low-shrinkage polyester industrial filament and preparation method thereof
  • Low-shrinkage polyester industrial filament and preparation method thereof
  • Low-shrinkage polyester industrial filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A preparation method of low shrinkage polyester industrial yarn, the steps are as follows:

[0071] (1) Preparation of modified polyester;

[0072] (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 2-ethyl...

Embodiment 2

[0080] A preparation method of low shrinkage polyester industrial yarn, the steps are as follows:

[0081] (1) Preparation of modified polyester;

[0082] (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 struc...

Embodiment 3

[0090] A preparation method of low shrinkage polyester industrial yarn, the steps are as follows:

[0091] (1) Preparation of modified polyester;

[0092] (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-et...

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Abstract

The invention relates to a low-shrinkage polyester industrial filament and a preparation method thereof. The preparation method comprises that modified polyester is subjected to solid phase polycondensation tackifying, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding, wherein an oil agent for oiling contains crown ether, and the content of the crown ether is 67.30-85.58 wt%. The preparation method is simple and reasonable; the dry-hot shrinkage rate of the finally prepared low-shrinkage polyester industrial filament under the conditions of 190 DEG C, 15 min and 0.01 cN / dtex is 2.5-4.7%. The low-shrinkage polyester industrial filament is made of the modified polyester, and a molecular chain of the modified polyester consists of 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 following structural formula defined 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.

Description

Technical field [0001] The invention belongs to the field of fiber preparation, and relates to a low-shrinkage type polyester industrial yarn and a preparation method thereof. Background technique [0002] Since its inception, polyethylene terephthalate (PET) fiber 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 i...

Claims

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Application Information

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IPC IPC(8): D01F6/84D01F11/08C08G63/183C08G63/78D01D5/096
CPCC08G63/183C08G63/78D01D5/096D01F6/84D01F11/08C08G63/80
Inventor 范红卫邵义伟尹立新汤方明
Owner JIANGSU HENGLI CHEM FIBER
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