Technique for producing ultra high-strength terylene industry filament yarn

A production process and ultra-high-strength technology, applied in the field of textile technology, which can solve the problems of insufficient spinning speed, unselected relaxation ratio, and insufficient attention to the importance of related parameters, so as to ensure viscosity uniformity and purity. Effect

Inactive Publication Date: 2008-03-19
JIANGSU SHENGHONG CHEM FIBRE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Insufficient research on the solid phase viscosity increasing (SSP) process, and insufficient attention has been paid to the importance of it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example one:

[0022] 1. Ordinary polyethylene terephthalate (PET) chips are solid-phase polymerized into industrial-grade high-viscosity chips that can produce industrial yarn: low-viscosity PET chips are quantitatively fed into the crystallizer through a rotary valve, and hot air is circulated at 180°C Crystallize to 30% crystallinity under the action, and then feed it to the roof reactor through the rotary valve with air lock device. Perform solid-phase polycondensation in a nitrogen environment at 230°C. By adjusting the residence time and nitrogen purity, the relative viscosity is 0.67. The viscosity of the low-viscosity chips is increased to the high-viscosity chips with a relative viscosity of 1.05. When the high-viscosity chips are cooled to 120°C, the high-viscosity chips are transported to the screw extruder silo using a nitrogen conveying system.

[0023] 2. Melt and extrude through the screw extruder, spray out from the spinneret hole, slowly cool, and cool to f...

Example Embodiment

[0025] Example 2. The preparation method and equipment are the same as in Example 1. The difference is that in step 3, the heat setting temperature in the first step is 245°C, the relaxation ratio is 4.4%, and the heat setting temperature in the second step is 240°C and the relaxation ratio is 7.6%; Than about 12%.

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PUM

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Abstract

The present invention discloses a production process for an ultra high tenacity polyester industrial filament. The production process adopts a one-step method of spinning and stretching, and the method comprises the solid state tackifying, the melt spinning, the high temperature stretching, the heat setting, and the winding forming. The present invention adopts the innovative five-pair hot roll stretching heat setting process, compared with the traditional four-pair hot roll stretching heat setting, the the present invention adopts two-stage heat stretching, the processing method of the two-stage heat setting effectively reduces the stretching speed of fiber, and prolongs the heat setting time of the fiber, so that the fiber has an even stable orientation structure while the physical performance of products is ensured, the spinning condition is optimized. The ultra high tenacity polyester industrial filament prepared by utilizing the method of the present invention has the advantages that the intensity is high, the stretching and the dry heat shrinkage are reasonable, the heat resistant performance is good, and the impact resistant performance and the fatigue resistant performance are good.

Description

technical field [0001] The invention discloses a production process of ultra-high-strength polyester industrial filament, which belongs to the technical field of textile technology. Background technique [0002] Since the advent of polyester in the 1950s, great progress has been made in the development of industrial applications. Polyester ultra-high-strength industrial filaments are widely used in the weaving of lifting belts, wire ropes, and cables due to their extremely high strength. [0003] At present, the domestic production is generally ordinary high-strength polyester industrial filament, and its quality is as follows: the breaking strength is 7.8-8.0cN / dtex, the dry heat shrinkage rate is 8-13%, and the 5% constant elongation load is <4cN / dtex. Ordinary high-strength wire can only be used to make general industrial products, and compared with high-performance products, it is necessary to use more raw wires to manufacture products that can lift the same load, wh...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D10/00D01D10/02D01F6/62
Inventor 郑凤莲
Owner JIANGSU SHENGHONG CHEM FIBRE CO LTD
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