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Low-temperature drafting production process for high-modulus and low-shrinkage polyester industrial yarn

A production process and low-shrinkage technology, applied in the direction of single-component polyester rayon, stretch spinning, heat treatment of rayon, etc., can solve the problems of large loss of dipping strength, high temperature of hot roller, high dimensional stability index, etc. problems, to achieve the effect of saving energy consumption and lowering the temperature of the hot roller

Active Publication Date: 2014-03-26
WUXI TAIJI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the production method of high-modulus low-shrinkage polyester industrial yarn, five pairs of hot rolls or six pairs of hot rolls are used for drafting, and a higher temperature of hot rolls is used, so the energy consumption of spinning production is high, and high-modulus low-shrinkage polyester After dipping industrial yarn twisted fabrics, the dipping strength loss is relatively large, and the dimensional stability index (the sum of constant load elongation and dry heat shrinkage) is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The low-temperature drawing production process of high-modulus low-shrinkage polyester industrial yarn, the steps are as follows;

[0018] (1) Processing of high-viscosity polyester chips: Take amorphous polyester chips with a viscosity of 0.65dl / g and increase the viscosity through solid-state polycondensation, so that the viscosity of the thickened chips can reach 1.25dl / g;

[0019] Described process through solid phase polycondensation thickening is:

[0020] (a) Crystallization: The amorphous polyester chip is pre-crystallized at a speed of 300r / min in the pre-crystallizer, and the pre-crystallizer is heated with heat conduction oil at 230°C, and the crystallization time is 12 minutes; then enters the second crystallizer for further Crystallization, crystallization at a speed of 450 r / min for 8 minutes, and the second crystallizer is heated with heat transfer oil at 210 °C;

[0021] (b) Drying: Then enter the desiccator and dry at 175°C for 60 minutes. In the desic...

Embodiment 2

[0030] The low-temperature drawing production process of high-modulus low-shrinkage polyester industrial yarn, the steps are as follows;

[0031] (1) Processing of high-viscosity polyester chips: Take amorphous polyester chips with a viscosity of 0.65dl / g and increase the viscosity through solid-state polycondensation, so that the viscosity of the thickened chips reaches 1.15dl / g;

[0032] The process of solid-state polycondensation thickening is:

[0033] (a) Crystallization: The amorphous polyester chips are pre-crystallized at a speed of 450r / min in the pre-crystallizer, and the pre-crystallizer is heated with heat conduction oil at 210°C, and the crystallization time is 8 minutes; then enter the second crystallizer for further Crystallization, crystallization at a speed of 300 r / min for 12 minutes, and the second crystallizer is heated with 200°C heat conduction oil;

[0034] (b) Drying: Then enter the desiccator and dry at 160°C for 65 minutes. In the desiccator, nitroge...

Embodiment 3

[0043] The low-temperature drawing production process of high-modulus low-shrinkage polyester industrial yarn, the steps are as follows;

[0044] (1) Processing of high-viscosity polyester chips: Take amorphous polyester chips with a viscosity of 0.65dl / g and increase the viscosity through solid-state polycondensation, so that the viscosity of the thickened chips reaches 1.15dl / g;

[0045] The process of solid-state polycondensation thickening is:

[0046] (a) Crystallization: The amorphous polyester chips are pre-crystallized at a speed of 450r / min in the pre-crystallizer, and the pre-crystallizer is heated with heat conduction oil at 210°C, and the crystallization time is 8 minutes; then enter the second crystallizer for further Crystallization, crystallization at a speed of 300 r / min for 12 minutes, and the second crystallizer is heated with 200°C heat conduction oil;

[0047] (b) Drying: Then enter the desiccator and dry at 160°C for 65 minutes. In the desiccator, nitroge...

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Abstract

The invention relates to a low-temperature drafting production process for high-modulus and low-shrinkage polyester industrial yarn, and belongs to the technical field of polyester industrial yarn manufacturing. According to the process, firstly, amorphous-form polyester chips are tackified through solid phase polycondensation, high-viscosity polyester chips are obtained, and then the high-modulus and low-shrinkage polyester industrial yarn product is obtained through melt spinning and drafting winding. After the high-modulus and low-shrinkage polyester industrial yarn is subjected to thread twisting and cloth weaving secondary-bath gum dipping, the brute force maintaining rate of rubberized cords of the high-modulus and low-shrinkage polyester industrial yarn is larger than 100% relative to the brute force of cord threads after the wire twisting, and the stability index of the size of the gum dipping core threads is smaller than 6.0%. According to the process, the brute force maintaining rate and the size stability index of the rubberized cords of the high-modulus and low-shrinkage polyester industrial yarn are superior to those of spinning drafting products produced with a conventional high-temperature drafting process. According to the process, in the spinning process, due to the fact that the temperature of a hot roller is low, energy consumption is saved.

Description

technical field [0001] The invention relates to a low-temperature drafting production process of high-modulus and low-shrinkage polyester industrial yarn, and belongs to the technical field of polyester industrial yarn manufacturing. Background technique [0002] For the field of polyester industrial yarn, the kind of polyester industrial yarn that has development prospects and higher added value is high modulus low shrinkage polyester industrial yarn. High modulus and low shrinkage polyester industrial yarn produced with high modulus and low shrinkage polyester industrial yarn Shrinkable polyester cord fabric is an ideal skeleton material, mainly used in industrial fields such as automobiles and transmission belts. At present, in the production method of high-modulus low-shrinkage polyester industrial yarn, five pairs of hot rolls or six pairs of hot rolls are used for drafting, and a higher temperature of hot rolls is used, so the energy consumption of spinning production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/16D01D10/02D01F6/62
Inventor 许其军江晓峰
Owner WUXI TAIJI IND
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