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Preparation of polyphenyl thioether fiber

A technology of polyphenylene sulfide fiber and polyphenylene sulfide, applied in the field of preparation of polyphenylene sulfide fiber, can solve the problems of PPS fiber characteristics decline, difficulty in applying PPS, spinning stability deterioration, etc., and achieve spinning performance Good, less decrease in mechanical strength, less disconnection effect

Inactive Publication Date: 2009-08-12
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to achieve the above purpose, solvent compounds such as water must be added. Even if it is suitable for PPS spinning, it is difficult to remove the solvent compounds such as water added to the extruder through the nozzle, which will cause PPS after spinning. It is difficult to apply this technology to PPS due to problems such as degradation of fiber properties and deterioration of spinning stability.

Method used

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  • Preparation of polyphenyl thioether fiber
  • Preparation of polyphenyl thioether fiber
  • Preparation of polyphenyl thioether fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] A predetermined amount of "Torelina" PPS powder E2280 (particle size: 1500 μm) manufactured by Toray Co., Ltd. with a melt index value of 150 was continuously fed into a twin-screw extruder with a vent hole (manufactured by Nippon Steel Co., Ltd. TEX30 type). The number of exhaust parts attached to the barrel of the extruder is 3, so that the vacuum degree of each is the same, and the vacuum degree in the barrel is 0.54kPa, and the temperature in the barrel is 320°C. The screw speed was 160 rpm. The molten material melted and transported in the barrel flows out of the barrel at a predetermined pressure and speed, is filtered through a filter with a mesh size of 150 μm, and is spun from a spinning nozzle. The heating temperature in the spinning nozzle was set at 320° C., the number of orifices in the spinning nozzle used was 700H, the orifice diameter was 0.2 mm, and the hole depth was 1.0 mm, so that the discharge rate was 370 g / min.

[0090] After the fibers obtained...

Embodiment 2

[0093] PPS short fibers were produced in the same manner as in Example 1, except that the PPS powder used was changed to "Torelina" PPS powder E2080 (particle size: 1500 μm) manufactured by Toray Co., Ltd. with a melt index value of 100. For the obtained PPS short fibers, the content of volatile gas components and fiber strength were measured, and the same heat treatment as in Example 1 was carried out, then the fiber strength was measured, and the fiber strength reduction rate was obtained. The results are shown in Table 1. The obtained PPS short fibers had a low content of gas volatile components and had good thermal durability. In addition, no problem was encountered during spinning, and the spinnability was good.

Embodiment 3

[0095] PPS short fibers were prepared in the same manner as in Example 1, except that the PPS powder used was changed to "Torelina" PPS powder M2481 (particle size: 1500 μm) manufactured by Toray Co., Ltd. with a melt index value of 220. For the obtained PPS short fibers, the content of volatile gas components and fiber strength were measured, and the same heat treatment as in Example 1 was carried out, then the fiber strength was measured, and the fiber strength reduction rate was obtained. The results are shown in Table 1. The obtained PPS short fibers had a low content of gas volatile components and had good thermal durability. In addition, no problem was encountered during spinning, and the spinnability was good.

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Abstract

The aim of the invention is to provide a method for preparing PPS fiber. The method uses a method except for thermal oxidation treatment for fully reducing the volatile gas composition in PPS for melted thread and increasing the spinning property when the thread PPS is melted thereby efficiently preparing the high-quality PPS fiber containing high-purity PPS. For settling the problem, the method of the invention comprises the following steps: melting the slit of polyphenyl thioether with melting index value for 100-230 in an exhaust extruder with 2-4 exhaust parts which have vacuum degree lower than 0.67kPa to fused mass in decompression mode, and delivering the fused mass to a spinning nozzle at the state that the fused mass is not solidified immediately for melt spinning thereby preparing the polyphenyl thioether fiber.

Description

technical field [0001] The invention relates to a preparation method of polyphenylene sulfide fiber with heat resistance and chemical resistance. Background technique [0002] Fibers containing polyphenylene sulfide (hereinafter referred to as PPS) have excellent properties such as heat resistance, chemical resistance, and flame retardancy derived from PPS materials. Fibers are used in various applications such as various filters, electrical insulating materials, papermaking canvas, and battery separators. In particular, PPS fibers are widely used in filter cloths for various industrial filters such as filter bags for exhaust gas dust collection. [0003] Generally speaking, PPS resin is polymerized by thioetherification agent (sodium sulfide, etc.) and polyhalogenated aromatic compounds (p-dichlorobenzene, etc.) method, etc., and then wash the PPS powder obtained after desolventization with water or an organic solvent to remove impurities, and then heat-treat as needed to...

Claims

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Application Information

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IPC IPC(8): D01D1/04D01D1/10D01D5/08D01F6/76
Inventor 吉田哲弘川端隼仁
Owner TORAY IND INC
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