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Preparation method of polyester industrial yarn for geogrids

A technology of polyester industrial yarn and geogrid, applied in the field of modified polyester fibers, can solve the problems of reduced tensile strength, reduced adhesive force, adverse effects, etc., to eliminate the effect of winding and eliminate fiber shrinkage , the effect of increasing the service life

Active Publication Date: 2019-05-14
JIANGSU HENGLI CHEM FIBER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The tensile breaking strength of composite materials mainly includes the strength of the reinforced substrate and the strength of the coating material. Generally speaking, it is difficult for synthetic polyester fibers to establish adhesive bonds at the interface due to their rare ends, smooth surface and low chemical activity. When processing geogrids from synthetic fibers, water-repellent finishing agents are required for water-repellent finishing. However, the combination fastness between water-repellent finishing agents and synthetic fibers such as polyester fibers is limited. In an acidic or alkaline environment, the adhesion between the water-repellent finishing agent and the synthetic fibers in it will gradually decrease, resulting in a decrease in the mechanical properties of the civil grid, especially in the tensile strength.
In addition, synthetic fibers often undergo irreversible heat shrinkage after being heated, and the shrinkage is more obvious when washing with hot water and ironing. Negative Effects

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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  • Preparation method of polyester industrial yarn for geogrids
  • Preparation method of polyester industrial yarn for geogrids
  • Preparation method of polyester industrial yarn for geogrids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation method of the polyester industrial yarn used for geogrid, the steps are as follows:

[0060] (1) prepare modified polyester;

[0061] (1.1) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method is: after mixing palladium acetate and dimethyl di-tert-butylethylene, add mass concentration It is 10% hydrogen peroxide solution, reacted at 72°C for 3 hours, cooled, crystallized and refined to obtain 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, wherein The mass ratio of dimethyldi-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:2.0:0.015, and the structural formula of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol is as follows Shown in formula (I);

[0062] (1.2) Esterification reaction;

[0063] Prepare terephthalic acid, ethylene glycol and 2,2,3,4,5,5-hexamethyl-3,4-hexanediol in a molar ratio of 1:1.2:0.03 to form a slurry, add di After antimony, titanium dioxide and triphenyl phosphate are mixed evenly, pressurize in a nitrogen at...

Embodiment 2

[0075] The preparation method of the polyester industrial yarn used for geogrid, the steps are as follows:

[0076] (1) prepare modified polyester;

[0077] (1.1) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method is: after mixing palladium acetate and dimethyl di-tert-butylethylene, add mass concentration It is 11% hydrogen peroxide solution, reacted at 70°C for 4 hours, cooled, crystallized and refined to obtain 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, wherein The mass ratio of dimethyldi-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:1.8:0.015, and the structural formula of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol is as follows Shown in formula (I);

[0078] (1.2) Esterification reaction;

[0079] Prepare a slurry of terephthalic acid, ethylene glycol and 2,2,3,4,5,5-hexamethyl-3,4-hexanediol with a molar ratio of 1:1.5:0.032, and add di After antimony, titanium dioxide and trimethyl phosphate are mixed evenly, carry out esterification ...

Embodiment 3

[0087] The preparation method of the polyester industrial yarn used for geogrid, the steps are as follows:

[0088] (1) prepare modified polyester;

[0089] (1.1) Synthesis of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, the method is: after mixing palladium acetate and dimethyl di-tert-butylethylene, add mass concentration It is 12% hydrogen peroxide solution, reacted at 74°C for 4 hours, cooled, crystallized and refined to obtain 2,2,3,4,5,5-hexamethyl-3,4-hexanediol, wherein The mass ratio of dimethyldi-tert-butylethylene, hydrogen peroxide solution and palladium acetate is 1:1.6:0.015, and the structural formula of 2,2,3,4,5,5-hexamethyl-3,4-hexanediol is as follows Shown in formula (I);

[0090] (1.2) Esterification reaction;

[0091] Make a slurry of terephthalic acid, ethylene glycol and 2,2,3,4,5,5-hexamethyl-3,4-hexanediol with a molar ratio of 1:1.5:0.034, add ethylene glycol After antimony, titanium dioxide and trimethyl phosphite are mixed evenly, carry out the ester...

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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Abstract

The invention relates to a preparation method of polyester industrial yarn for geogrids. The specific process includes the steps: a modified polyester melt is subjected to solid phase condensation polymerization viscosification, melting, metering, extrusion, cooling, oiling, stretching, thermal setting, relaxation heat treatment and winding, and the polyester industrial yarn for the geogrids is obtained. A preparation method of modified polyester before solid phase condensation polymerization viscosification includes the steps: terephthalic acid, ethylene glycol, and 2,2,3,4,5,5-hexamethyl-3,4-hexanediol are mixed evenly and then subjected to an esterification reaction and a polycondensation reaction successively; relaxation heat treatment refers that modified polyester tows pass through the space with a certain temperature in an appropriate relaxation state; the appropriate relaxation state refers that the overfeed rate of winding is 3.0-5.0%; and the certain temperature refers to 200-240 DEG C. According to the preparation method of the polyester industrial yarn for the geogrids, the process is simple, the finally obtained polyester industrial yarn has excellent heat-resistant shrinkage performance, excellent acid and alkali resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a method for preparing polyester industrial yarns for geogrids. Background technique [0002] Geogrid is a geosynthetic material with regular mesh and high strength formed by processing polymer materials such as polypropylene, high-density polyethylene, polyester fiber, glass fiber, etc. by stretching, weaving or welding. As a new type of building material, it has the advantages of strong tensile capacity, small deformation, corrosion resistance, long life, convenient construction, and low cost. Reinforced soil engineering such as walls, tunnels, slope protection and mine roadways. With the continuous enhancement of the country's comprehensive strength, the country's investment in infrastructure construction has also continued to increase, and various functional, refined, and high-performance geogrids have been launched one after another to meet market demand. ...

Claims

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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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D13/00D01D10/02
Inventor 汤方明陈瑞王丽丽
Owner JIANGSU HENGLI CHEM FIBER
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