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Preparation of polyphenyl thioether fiber

A technology of polyphenylene sulfide fiber and polyphenylene sulfide, applied in the direction of melt spinning, melting of filament raw materials, etc., can solve the problems of difficult application of PPS, decrease of PPS fiber characteristics, deterioration of spinning stability, etc., and achieve Excellent spinnability, less decrease in mechanical strength, less thread breakage

Inactive Publication Date: 2012-05-30
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: 1500μm) manufactured by Toray Co., Ltd. with a melt index value of 150 is continuously fed into a twin-screw extruder with vent holes (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 0.54 kPa, the temperature in the barrel is 320 ℃, The screw speed is 160 rpm. The molten material that is melted and transported in the barrel flows out of the barrel under a predetermined pressure and a predetermined speed, filtered with a filter with a mesh of 150 μm, and spun out from the spinning nozzle. The heating temperature in the spinning nozzle is set to 320°C, the number of nozzle holes of the spinning nozzle used is 700H, the nozzle hole diameter is 0.2mm, the hole depth is 1.0mm, and the discharge rate is 370g / min.

[0090] After the fibers obtained...

Embodiment 2

[0093] PPS short fibers were prepared in the same manner as in Example 1, except that the PPS particles used were changed to "Torelina" PPS particles E2080 (particle size: 1500 μm) manufactured by Toray Corporation with a melt index value of 100. For the obtained PPS short fibers, the content of the volatile gas components and the fiber strength were measured, and the same heat treatment as in Example 1 was performed, and then the fiber strength was measured, and the fiber strength reduction rate was determined. The results are shown in Table 1. The obtained PPS short fiber has a small content of gas volatile components and has good thermal durability. In addition, no problems were 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 used PPS particles were changed to "Torelina" PPS particles M2481 (particle size: 1500 μm) manufactured by Toray Corporation 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 performed, and then the fiber strength was measured, and the fiber strength reduction rate was determined. The results are shown in Table 1. The obtained PPS short fiber has a small content of gas volatile components and has good thermal durability. In addition, no problems were 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 method for preparing polyphenylene sulfide fibers with heat resistance and chemical resistance. Background technique [0002] Fibers containing polyphenylene sulfide (hereinafter referred to as PPS) have excellent heat resistance, chemical resistance, flame retardancy and other excellent properties derived from PPS materials. Therefore, the above-mentioned characteristics have been used. Fiber is used in various applications such as filters, electrical insulating materials, papermaking canvas, and battery separators. In particular, PPS fibers are widely used in the application of filter cloth for various industrial filters such as filter bags for exhaust gas dust collection. [0003] Generally speaking, PPS resin is polymerized by thioetherifying agent (sodium sulfide, etc.) and polyhalogenated aromatic compound (p-dichlorobenzene, etc.) in a polar organic solvent under high temperature and high pressure alkaline conditions. Then,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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