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High-modulus low-shrinkage stiff cord and preparation method thereof

A technology of high modulus, low shrinkage, and hard cord, which is applied in the direction of fiber type, filament/thread forming, single-component copolyester artificial filament, etc., and can solve the problems of uneven fiber and spinneret affecting fiber quality, etc. , to achieve the effect of reducing coking degree, lowering temperature and increasing cross-sectional area

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

[0008] The purpose of the present invention is to overcome the problems in the prior art that the oil agent volatilizes quickly and is easily bonded 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 method that is uniform and High-modulus low-shrinkage hard cord with less oligomer content and its preparation method

Method used

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  • High-modulus low-shrinkage stiff cord and preparation method thereof
  • High-modulus low-shrinkage stiff cord and preparation method thereof
  • High-modulus low-shrinkage stiff cord and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] A method for preparing a high-modulus low-shrinkage hard cord, the specific steps are as follows:

[0095] (1) Preparation of modified polyester:

[0096] (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:

[0097]

[0098] (b) polycondensation reaction; after the esterification reaction ends, start the p...

Embodiment 2

[0104] A method for preparing a high-modulus low-shrinkage hard cord, the specific steps are as follows:

[0105] (1) Preparation of modified polyester:

[0106] (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:

[0107]

[0108] (b) polycondensation reaction; after the esterification reaction ends, start th...

Embodiment 3

[0114] A method for preparing a high-modulus low-shrinkage hard cord, the specific steps are as follows:

[0115] (1) Preparation of modified polyester:

[0116] (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, the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid, and 2-butyl-2- The structural formula of ethyl-1,3-propanediol is as follows:

[0117]

[0118] (b) polycondensation reaction; after the esterification reaction ends, start the polycondensation reaction of the low vacuum stage under negative pressure conditions, and within 40min, the pressure is ste...

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Abstract

The invention relates to a high-modulus low-shrinkage stiff cord and a preparation method thereof. The preparation method comprises the following steps: performing solid-phase polycondensation-viscosity enhancement, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding to obtain high-modulus and low-shrinkage polyester industrial yarns; twisting to obtain a cord; making the cord into a high-modulus low-shrinkage stiff cord by a two-bath impregnation method, wherein during cooling, the longitudinal height is kept constant and the cross-sectional area of a slow cooling chamber is increased; meanwhile, the surface temperature of a spinneret plate is kept in a heat preserving way in the slow cooling chamber; an oiling agent contains 67.30 to 85.58 percent by weight of crown ether; during use of the oiling agent, 14 to 18 percent by weight emulsion is prepared with water. The preparation method disclosed by the invention is simple; the prepared high-modulus low-shrinkage stiff cord is made from modified polyester of which the molecular chain includes a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with a branched chain, is greater than or equal to 80N in breaking strength, and is greater than or equal to 37KN / m in cord bonding strength.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a high-modulus low-shrinkage hard wire rope 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 cy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D07B1/02D01D5/088D01D5/096D01F6/84D01F11/08D06M13/02D06M13/11D06M13/224D06M13/256D06M13/292C08G63/183D06M101/32
CPCC08G63/183D01D5/088D01D5/096D01F6/84D01F11/08D06M13/02D06M13/11D06M13/2243D06M13/256D06M13/292D06M2101/32D07B1/02D07B2205/2039
Inventor 刘灯胜赵慧荣李文刚孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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