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High-strength low-extension polyester staple fiber preparation method

A polyester staple fiber, high-strength and low-elongation technology, applied in the field of polyester production technology, can solve the problem that the breaking strength and other qualities of polyester staple fibers cannot meet the requirements of high-strength and low-elongation fibers, and achieve low elongation at break and a wide range of production deniers , a wide range of effects

Active Publication Date: 2008-10-01
上海太平洋二纺机化纤成套设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The breaking strength and other qualities of polyester staple fibers produced by the above two traditional processes cannot meet the market's requirements for high-strength and low-elongation fibers, especially the requirements for breaking strength of sewing threads in the garment industry.

Method used

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  • High-strength low-extension polyester staple fiber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The original tow with a specification of 1.33dtex / 3780f, a breaking strength CV value of ≤12%, and a breaking elongation CV value of ≤11% is passed through the first drafting machine, a water bath at a temperature of 70°C, and a second drafting machine. Drafting, the drafting ratio is 1:3.04; after entering the steam heating box with a temperature of 110°C, the 18-roll tension heat setting machine with a roller surface temperature of 217°C is used for secondary drafting, and the drafting ratio is 1:1.16; then enter the second stage The remaining drawing is performed by three drawing machines, and the drawing ratio is 1:0.998; the silk after being crimped by a crimping box with a crimping temperature of 90°C is cooled to below 75°C by a relaxation heat setting machine, and is cut after being evenly dried. The performance of the produced product is good, and the physical indexes of the obtained silk are shown in Table 1.

Embodiment 2

[0025] The original tow with a specification of 1.50dtex / 3780f, a breaking strength CV value ≤ 12%, and a breaking elongation CV value ≤ 11% are passed through the first drafting machine, a water bath at a temperature of 72°C, and a second drafting machine. Drafting, drafting ratio 1: 3.02; after entering the steam heating box with a temperature of 115°C, pass through an 18-roller tension heat setting machine with a roller surface temperature of 210°C for secondary drafting, with a drafting ratio of 1: 1.14; then enter the second The remaining drawing is performed by three drawing machines, and the drawing ratio is 1:0.998; the silk after being crimped by a crimping box with a crimping temperature of 90°C is cooled to below 75°C by a relaxation heat setting machine, and is cut after being evenly dried. The performance of the produced product is good, and the physical indexes of the obtained silk are shown in Table 1.

example 3

[0027] The original tow with a specification of 1.56dtex / 4250f, a breaking strength CV value ≤ 12%, and a breaking elongation CV value ≤ 11% are passed through the first drafting machine, a water bath at a temperature of 75°C, and a second drafting machine. Drafting, drafting ratio 1: 3.0; after entering the steam heating box with a temperature of 117°C, pass through an 18-roll tension heat setting machine with a roller surface temperature of 210°C for secondary drafting, with a drafting ratio of 1: 1.18; then enter the second stage The remaining drawing is carried out by three drawing machines, and the drawing ratio is 1:0.995; after being crimped by a crimping box with a crimping temperature of 95°C, the silk is cooled to below 75°C by a relaxation heat setting machine, and is cut after being uniformly dried. The performance of the produced product is good, and the physical indexes of the obtained silk are shown in Table 1.

[0028] Table 1 The polyester staple fiber finishe...

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Abstract

This invention relates to a terylene product technology, especially to a preparing method for short fabric with high strength and low elongation. This method uses the tow without drawing-off (short for original tow) for raw material, the working procedure for the production as follows: the first drawing-off, the second drawing-off, 18 roll tense thermoforming, the third drawing-off, curling, loose thermoforming, cutting off. Namely carrying out the first drawing-off through the water bath which between the thirst drafting machine and the second drafting machine; carrying out the second drawing-off through the steam heater which between the second drafting machine and the 18 roll tensely thermoforming machine; and then carrying out the thermoforming through the 18 roll tense thermoforming machine; carrying out the surplus drawing-off through the third drafting machine; curling through the curling machine; then drying through the loose thermoforming machine and cutting off after the thermoforming treatment. The original tow in this technology has a better drawing off, basically it hasn't the none-drawing off product, double long product and exceed long product, and the final product has the high strength, low elongation, and low thermal contraction and so on. The rupture strength >= 6.0CN / dtex, the rupture elongate rate 11-25%, the dry thermal contraction rate<8%.

Description

technical field [0001] The invention belongs to polyester production technology, in particular to a preparation method of high-strength and low-elongation polyester staple fiber. Background technique [0002] Polyester staple fiber is widely used in high-end clothing, leather products, medical surgery, military supplies and many other fields due to its high strength, good durability, corrosion resistance and mildew resistance. The preparation of high-strength and low-elongation polyester staple fibers generally adopts a post-treatment process with tension heat setting and relaxation heat setting, which requires properties such as high strength, low elongation and low dry heat shrinkage. [0003] At present, there are mainly two types of polyester staple fiber trial production technologies at home and abroad: [0004] (1) Follow the production route of general polyester staple fiber to produce medium-strength and low-elongation polyester staple fiber. Production method: ado...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/098D01D10/02
Inventor 来可华李福原
Owner 上海太平洋二纺机化纤成套设备有限公司
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