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polyphenylene sulfide fiber

A polyphenylene sulfide fiber, fiber diameter technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, separation methods, etc., can solve the problems of fiber structure stability, inhibit strength reduction, etc., and achieve fiber structure changes. Small size, small strength reduction, and excellent long-term heat resistance

Active Publication Date: 2020-04-03
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no mention of techniques for improving the stability of the fiber structure at high temperatures and suppressing a decrease in strength when the PPS fibers are used.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment

[0060] Hereinafter, the present invention will be described more specifically using examples. In addition, each characteristic value in an Example was calculated|required by the following method.

[0061] A. Weight average molecular weight

[0062] The weight average molecular weights of the PPS polymer and the PPS fiber were calculated in terms of polystyrene by gel permeation chromatography (GPC), which is one type of size exclusion chromatography (SEC). The measurement conditions of GPC are as follows.

[0063] Device: SSC-7100 manufactured by Senshu Science Co., Ltd.

[0064] Column name: GPC3506 manufactured by Senshu Scientific Co., Ltd.

[0065] Eluent: 1-Chloronaphthalene

[0066] Detector: Differential Refractive Index Detector

[0067] Column temperature: 210°C

[0068] Pre-heating bath temperature: 250°C

[0069] Pump thermostat temperature: 50°C

[0070] Detector temperature: 210°C

[0071] Flow: 1.0mL / min

[0072] Sample injection volume: 300 μL (slurry ...

reference example 1

[0094]

[0095] In a 70-liter autoclave with a stirrer, 8.27kg (70.0 moles) of 47.5% sodium hydrosulfide, 2.96kg (71.0 moles) of 96% sodium hydroxide, N-methyl-2-pyrrolidone (hereinafter, sometimes referred to as 11.44kg (116 moles) of NMP), 1.72kg (21.0 moles) of sodium acetate, and 10.5kg of ion-exchanged water, slowly heated to about 240°C for about 3 hours under normal pressure while feeding nitrogen gas, and rectified Tower, 14.8kg of water and 280g of NMP were distilled off, and then the reaction vessel was cooled to 160°C. In addition, 0.02 mol of hydrogen sulfide flew out of the system with respect to 1 mol of the sulfur component charged during this dehydration operation.

[0096] Next, 10.3 kg (70.3 mol) of p-dichlorobenzene and 9.00 kg (91.0 mol) of NMP were added, and the reaction container was sealed under nitrogen gas. While stirring at 240 rpm, the temperature was raised to 270° C. at a rate of 0.6° C. / minute, and maintained at this temperature for 140 minute...

reference example 2

[0103]

[0104] The PPS oligomer containing cyclic PPS obtained in Reference Example 1 was charged into an autoclave equipped with a stirrer, the atmosphere was replaced with nitrogen, and the temperature of the autoclave was raised to 340° C. over 1 hour. During the temperature rise, when the PPS oligomer melted, the rotation of the stirrer was started, and the melt heating was performed for 180 minutes while stirring at a rotation speed of 10 rpm. Then, the resin was taken out from the discharge hole in the shape of a gut by nitrogen gas pressure, and the gut was pelletized. The solid matter obtained as described above was dried with hot air at 130° C. to obtain a dried PPS resin (A).

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Abstract

The present invention provides a polyphenylene sulfide fiber having little change in fiber structure and excellent long-term heat resistance. That is, there is provided a polyphenylene sulfide fiber characterized by having a crystallinity of 45.0% or more, a mobile amorphous content of 15.0% or less, and a weight average molecular weight of 300,000 or less.

Description

technical field [0001] The present invention relates to a polyphenylene sulfide fiber having little change in fiber structure and excellent long-term heat resistance. Background technique [0002] Polyphenylene sulfide (hereinafter, sometimes referred to as PPS) fiber has high heat resistance, chemical resistance, electrical insulation, and flame retardancy, so it has been used in various filters, electrical insulation materials, papermaking canvas, etc. In particular, it has been widely used in filter cloths used in various industrial filters such as bag filters for exhaust gas dust collection. [0003] When used as a bag filter, the exhaust gas of the incineration equipment is high temperature, and the service life is only a few years. That is, in the use of industrial material materials such as bag filter cloths, it is important to have excellent long-term heat resistance, and at high temperatures such as 150 to 210°C, small changes in fiber structure and small reduction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/76
CPCD01F6/765D02J1/22D02J13/00D02J13/005D01F6/76D10B2505/04B01D39/083B01D2239/0618C08G75/02C08G75/16C08K5/375C08L23/32D01D5/12
Inventor 胜田大士光永怜央山本大介堀内俊辅船津义嗣
Owner TORAY IND INC
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