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Preparation method of special polyester staple fiber for vortex spinning

A polyester staple fiber, vortex spinning technology, applied in the direction of staple fiber formation, melt spinning, fiber processing, etc., can solve the problems of poor twisting effect, long fiber length, low linear density, etc., and achieve stable temperature and fiber length. Long, dry heat stable effect

Active Publication Date: 2022-06-03
ZHEJIANG HENGYI HIGH TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the twisting effect becomes worse when the spinning speed is increased, the present invention provides a method for preparing polyester staple fibers specially used for vortex spinning. The short fiber is made of (1.27~1.29) dtex*(40~42)mm specification, which is smaller in linear density and longer in fiber length than conventional vortex spinning fibers (1.33dtex*38mm), and is more conducive to the inter-fiber spacing during vortex spinning. Without changing the eddy current intensity, it can make up for the weak twist problem caused by the increase of spinning speed

Method used

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  • Preparation method of special polyester staple fiber for vortex spinning

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Comparison scheme
Effect test

Embodiment 1

A preparation method of special polyester staple fiber for vortex spinning,

(1) Front spinning. The high-temperature melt after the final polymerization kettle is processed into a certain length of raw tow for post-spinning processing through spinning, cooling, oiling, winding, and filament-filling processes.

[0022] The polyester melt (intrinsic viscosity is 0.650) is obtained by conventional polymerization, and the raw tow of 4.2dtex is made under the spinning process speed of 1380m / min, and the spinning temperature is 298°C; Blowing humidity 80%, blowing speed 1.5m / s, EYS1.5 average value of raw tow is 160, EYS1.5 CV value average 6.0, breaking elongation average 365, breaking elongation CV value average 6.0.

[0023] (2) After spinning. The obtained raw tow is successively bundled, first-stage drafting, second-stage drafting, 20-roll tension heat-setting, three-stage drafting, crimping, relaxation heat-setting, cutting and packaging processes, to obtain 1.28dtex*40mm sp...

Embodiment 2

Embodiment 3

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Abstract

The invention relates to the field of chemical fibers, and provides a preparation method of polyester staple fibers special for vortex spinning aiming at the problem that the twisting effect becomes poor when the spinning speed is increased, the preparation method comprises a fore-spinning process and a post-spinning process, specifically, a high-temperature polyester melt is subjected to fore-spinning to be processed into protofilament bundles, and post-spinning is carried out by taking the protofilament bundles as raw materials; the special polyester staple fiber for vortex spinning with the size of (1.27-1.29) dtex * (40-42) mm is prepared by sequentially carrying out bundling, first-time drafting, second-time drafting, tension heat setting, third-time drafting and curling on the raw materials, compared with conventional vortex spinning fibers (1.33 dtex * 38 mm), the special polyester staple fiber for vortex spinning is smaller in linear density and longer in fiber length, entanglement among the fibers is more facilitated during vortex spinning, and on the premise that the vortex strength is not changed, the production efficiency is greatly improved. The problem of weak twisting caused by spinning speed increase can be solved, and the prepared polyester staple fiber special for vortex spinning is high in breaking strength, low in elongation and stable in dry heat.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a preparation method of special polyester staple fibers for vortex spinning. Background technique [0002] In human history, clothing, food, housing and transportation are closely related to our lives, and the first "clothing" is an indispensable part of our daily life. The progress of spinning technology has promoted the progress of human civilization. Air-jet vortex spinning is a new type of spinning method. Compared with traditional ring spinning, it has the advantages of short spinning process, high production efficiency, online quality monitoring, and high degree of automation and intelligence. It has the advantages of less floor space, less labor and lower energy consumption. [0003] The raw materials suitable for air-jet vortex spinning include natural fibers such as cotton and linen, and chemical fibers such as viscose, polyester, and acrylic. Polyester fiber is favored ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/26D01D5/092D01D5/098D01D5/22D01D10/02D01F6/62D01F11/08
CPCD01D5/26D01D5/092D01D5/098D01D5/0985D01D5/22D01D10/02D01F6/62D01F11/08Y02P70/62
Inventor 闫东宁董庆奇解雪瑶高锁
Owner ZHEJIANG HENGYI HIGH TECH MATERIAL
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