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Production method of self-extensional polyester fibre

A manufacturing method and self-stretching technology, which is applied in the field of self-stretching polyester manufacturing, can solve the problems of poor process stability, easy occurrence of silk spots, unstable fiber self-stretching performance, etc., and achieve excellent self-stretching performance and process stable effect

Inactive Publication Date: 2004-10-06
BALING PETRO CHEM CO LTD SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods must require heat treatment with a relaxation rate of 20-50%, and the equipment requires special requirements; the process stability is poor, the filaments swing greatly during production, silk spots, dyeing spots, etc. are prone to occur, and the self-elongation of the prepared fibers is unstable. short time
In addition, such as POY stretching heat treatment in JP-A-2000-199125, special equipment is required, that is, three stretching discs are used, and the heat setting disc is a textured roller. time storage

Method used

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  • Production method of self-extensional polyester fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Polyester (PET) POY raw silk is used as raw material. The POY raw silk is polyester pre-oriented yarn with a spinning speed of 3300m / min, and the specification is 128dtex / 36f. figure 1 The flat drawing machine shown above passes through the wire feeding roller, controls the temperature of the upper hot plate to 90°C, the temperature of the lower hot plate to 130°C, the drafting ratio is 1.01, the heat setting time is 0.25 seconds, the drafting speed is 350m / min, and then the winding is carried out by the small rotor. Get the product. The production is stable, there is no swaying phenomenon, and the coiling is good. After testing, the self-elongation of polyester is 3.21%. The product is stored for 3 months and tested again. The self-elongation rate is 3.2%, and the product performance is stable.

Embodiment 2

[0025] Change the temperature of the upper hot plate, and other conditions are the same as in Example 1, and the physical property values ​​of the products obtained are shown in Table 2. The results show that: when the temperature of the upper heating plate is 80℃~110℃, the drawn yarn obtained has good self-extensibility, but when the temperature of the upper plate is 70℃, the drawn yarn obtained has no self-extensible property.

[0026] Upper hot plate temperature

Embodiment 3

[0028] Change lower hot plate temperature, other conditions are the same as embodiment 1, carry out drafting, the product property value obtained is shown in Table 3. The results show that the drawn yarn has self-extensibility when the temperature of the lower hot plate is above 110℃. When the temperature of the lower hot plate is 100°C, the drawn yarn has no self-extensibility.

[0029] Lower hot plate temperature

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Abstract

The production method of self-extending polyester fibre is simplemented by using polyester POY grey yarn whose spinning speed is 3000 m / min-3500 m / min through the process of drawing-heat forming procedure on the general flat drafting machine. It is characterized by that it sdrafting temp. must be controlled in 80 deg.C-110 deg.C, heat-forming temp. must be controlled in 110 deg.C-140 deg.C, and the drafting multiple is 1.0-1.2, and heat-forming time is 0.2 sec.-0.4 sec. Said invented method can be used for producing fibre whose self-extending rate is 0%-5%, and its performance is stable, and can be stored for a long period.

Description

technical field [0001] The invention relates to a method for manufacturing self-stretching polyester. Background technique [0002] Self-extensibility refers to the self-extensibility of the fiber after dry heat treatment (usually referring to textile heat-setting treatment) of 0% or more. At present, the manufacturing method of self-extensible polyester, such as the polyester partially oriented yarn (hereinafter referred to as POY) in the Japanese Patent Application Publication No. 4-352826, is drawn, followed by a method of relaxation heat treatment; in the Japanese Publication No. 2-293410, POY is intact The relaxation heat treatment method without moving; the fixed-length heat treatment method of POY in JP-9-21060 Bulletin, etc. These methods must require heat treatment with a relaxation rate of 20-50%, and the equipment requires special requirements; the process stability is poor, the filaments swing greatly during production, silk spots, dyeing spots, etc. are prone t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D10/02D02J1/22
Inventor 周卫东符慧冯美平肖哲唐雪林
Owner BALING PETRO CHEM CO LTD SINOPEC
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