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Super high strength polyester industrial filament and preparation method thereof

An ultra-high-strength, industrial yarn technology, applied in the direction of single-component polyester rayon, single-component copolyester rayon, filament/thread forming, etc., can solve the problem of poor mechanical properties of fibers and fiber quality No advanced problems, good mechanical properties, long replacement cycle, simple and reasonable preparation method

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

[0007] The purpose of the present invention is to provide a kind of high-quality ultra-high-strength polyester industrial yarn with good mechanical properties and its preparation method in order to overcome the problems of poor fiber mechanical properties and low fiber quality in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Super high strength polyester industrial filament and preparation method thereof
  • Super high strength polyester industrial filament and preparation method thereof
  • Super high strength polyester industrial filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of ultra-high-strength polyester industrial yarn, the steps are as follows:

[0049] (1) preparation of modified polyester;

[0050] (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 After mixing with triphenyl phosphate evenly, 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 250°C. 90% is the end point of the esterification reaction, wherein the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.05% of the weight of terephthalic acid, wherein 2-ethyl- The structural formula of 2-methyl-1,3-propanediol is as follows:

[0051]

[0052] (b) polycondensation reaction; after the esterification reaction is over, start t...

Embodiment 2

[0056] A preparation method of ultra-high-strength polyester industrial yarn, the steps are as follows:

[0057] (1) preparation of modified polyester;

[0058] (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 and phosphoric acid After the trimethyl ester is mixed evenly, the esterification reaction is carried out under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. When is the end point of the esterification reaction, the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of trimethyl phosphate is 0.03% of the weight of terephthalic acid, and 2,2-diethyl The structural formula of -1,3-propanediol is as follows:

[0059]

[0060] (b) polycondensation reaction; after the esterification reaction is over, start ...

Embodiment 3

[0064] A preparation method of ultra-high-strength polyester industrial yarn, the steps are as follows:

[0065] (1) preparation of modified polyester;

[0066] (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 After the trimethyl phosphate is mixed evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. % is the end point of the esterification reaction, wherein the addition of antimony acetate is 0.03% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid, wherein 2-butyl-2- The structural formula of ethyl-1,3-propanediol is as follows:

[0067]

[0068] (b) polycondensation reaction; after the esterification reaction is finished, start the polycondensation reaction in the low vacuum stage under negative pressure conditions, and within 40 minutes, ...

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Abstract

The invention relates to a super high strength polyester industrial filament and a preparation method thereof. Modified polyester is subjected to solid phase polycondensation tackifying, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding to obtain the super high strength polyester industrial filament, wherein the super high strength polyester industrial filament ismade of the modified polyester, and a molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment with a branchedchain, 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. The breaking strength of the super high strength polyester industrial filament is more than or equal to 8.8 cN / dtex. The method is simple and reasonable, and the prepared industrial filament has super high breaking strength and good mechanical properties.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to an ultra-high-strength polyester industrial yarn and a preparation method thereof. Background technique [0002] Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared from it has wrinkle resistance. And good stiffness, so polyester fiber is widely used in clothing and home textiles and other fields. [0003] However, during the polycondensation reaction of synthesizing ethylene terephthalate, especially when producing linear high polymers, linear and cycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01F6/92C08G63/183D01D5/088D01D5/096
CPCC08G63/183D01D5/088D01D5/096D01F6/84D01F6/92
Inventor 汤方明张建光杨大矛邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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