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Preparation method of polyester staple fiber

A polyester staple fiber and process route technology, which is applied in the field of polyester staple fiber preparation, can solve the problems of inability to obtain high-strength and low-elongation products, limit product variety adjustment range, and low production speed, so as to achieve high product market competitiveness and smooth production. The effect of low drying unevenness and low production cost

Inactive Publication Date: 2008-10-15
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Application Information

AI Technical Summary

Problems solved by technology

This type of method has low production speed, cannot increase production capacity, and cannot obtain high-strength and low-elongation products, thus limiting the range of product variety adjustments

Method used

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Examples

Experimental program
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Embodiment Construction

[0021] The present invention is described in detail below by way of examples.

[0022] The first type of equipment includes: the polymerization device is a five-pot polymerization process device designed by the China Textile Institute, the spinning equipment is a complete set of equipment with a ring blowing device from Barmag in Germany, and the subsequent devices are produced by Beijing Zhongli Machinery.

[0023] The raw materials are purified terephthalic acid (PTA) from Xianglu and ethylene glycol (EG) from Mitsubishi Chemical, and a small amount of monopentaerythritol, DEG, antimony trioxide, titanium dioxide and other catalysts, matting agents and stabilizers are added to The five-pot polymerization process is used to carry out polymerization reaction to obtain a melt, and the intrinsic viscosity of the melt is controlled at 0.63-0.65; in the ring blowing and spinning at a wind temperature of 15-30°C, a wind pressure of 800-4500Pa, and a wind speed of 1.5-2.5 m / min Unde...

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Abstract

The invention aims to provide a method for preparing polyester staple fiber. The invention is characterized in that the method adopts the process route of directly spinning melt mass to manufacture, and uses purified terephthalic acid (PTA) and ethylene glycol (EG) as raw materials and adds small quantities of mono-pentaerythritol, DEG, antimony trioxide, titanium dioxide and other catalysts, flatting agents and stabilizing agents. The method uses the process flow of five autoclaves polymerization to perform polyreaction so as to receive the melt which is finally spun into tows, and prepares the polyester staple fiber via primary drawing, secondary drawing, 18 roller tension heat setting, third drawing, crimping, relaxation heat setting and cutting. The method has the advantages of stable raw material supply, high product strength, few defects, good crimp, moderate oil applying rate and stable dry-heat shrinkage percentage; products prepared by the method have good spinnability, so that yarn spun by the product is high in each quality index, and produced textile has soft and smooth hand feeling; and the manufacturing cost is lower than chip spinning, so that the marketing competitive power of the products is stronger.

Description

technical field [0001] The invention relates to a preparation method of polyester staple fiber, which belongs to the technical field of chemical 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. [0003] At present, the method of domestic production of polyester staple fiber mainly adopts the chip spinning process route, which is finally obtained through spinning, drawing, cutting, drying and other processes. The typical process example is: polyester with an intrinsic viscosity of 0.63-0.65 Melt spinning, the spinning process speed is between 1100 and 1250 m / min; the prepared raw yarn adopts two drafts, and is made by adjusting the temperature of the water bath, the steam box, and the ratio of the first and second draw ratios. Take medium-strength low-stretch polyester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01D5/092
Inventor 浦金龙孔小明
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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