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Polyphenylene sulfide short fiber, fibrous structure, filter felt, and bag filter

A bag filter, polyphenylene sulfide technology, applied in the direction of membrane filter, short fiber formation, filtration separation, etc., can solve the problem of not being able to function as a bag filter, filter cloth breakage, and insufficient dimensional stability of the filter cloth and other problems, to achieve the effect of improving dust collection performance and improving mechanical strength

Active Publication Date: 2020-07-17
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When external force is applied periodically, the mechanical strength of the filter cloth and the dimensional stability of the filter cloth are insufficient, and there is a problem that the filter cloth is broken and cannot function as a bag filter.

Method used

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  • Polyphenylene sulfide short fiber, fibrous structure, filter felt, and bag filter
  • Polyphenylene sulfide short fiber, fibrous structure, filter felt, and bag filter
  • Polyphenylene sulfide short fiber, fibrous structure, filter felt, and bag filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] First, fine fineness fibers were produced by the method described below.

[0138] PPS pellets manufactured by Toray Co., Ltd. with an MFR value of 240 g / 10 minutes were vacuum-dried at a temperature of 160° C. for 5 hours, and then supplied to a pressure-melt type melt spinning machine at a spinning temperature of 320° C., Melt spinning with a discharge rate of 400g / min, cooling and solidification by cooling air at room temperature, applying a usual spinning oil for PPS as a sizing agent, and pulling at a pulling speed of 1,200m / min to obtain an undrawn yarn .

[0139] The obtained undrawn yarn was stretched in warm water at 95°C to a draw ratio of 3.3 times for the first step, and then the second step was drawn in steam so that the total draw ratio became 3.5 times, and then further drawn in steam. The fixed-length heat treatment was performed at a magnification of 1.10 times while being connected to a heat drum at 230°C. Next, crimping was applied with a stuffer typ...

Embodiment 2

[0143] In Example 1, when making fine-fiber fibers, the PPS pellets manufactured by Toray Co., Ltd. with an MFR value of 215 g / 10 minutes were used to make the first-stage draw ratio 3.2 times and the total draw ratio to 3.4 times. Except for this, it carried out similarly to Example 1, and obtained the fine fineness / high-strength PPS short fiber. The fineness is 0.88dtex, and the strength is 4.8cN / dtex, which is fineness / high strength.

[0144] A filter material was obtained by the same method as in Example 1 using the obtained fine fineness / high-strength PPS short fibers. Productivity and felt properties / filter properties are shown in Table 1. Spinning workability and felt productivity were good. In addition, the mechanical strength of the felt was good at warp: 1005 N / 5 cm and weft: 1680 N / 5 cm, and improvement in mechanical strength was confirmed. The outlet dust concentration, which is an index of dust collection performance, is 0.22 mg / m 3 , is good, and the improvem...

Embodiment 3

[0146] In Example 1, when making fine fineness fibers, the PPS granules manufactured by Toray Co., Ltd. with an MFR value of 260 g / 10 minutes were used to make the first-stage draw ratio 3.5 times and the total draw ratio 3.7 times. Except for this, it carried out similarly to Example 1, and obtained the fine fineness / high-strength PPS short fiber. The fineness is 0.77dtex, and the strength is 4.7cN / dtex, which is fineness / high strength.

[0147] A filter material was obtained by the same method as in Example 1 using the obtained fine fineness / high-strength PPS short fibers. Productivity and felt properties / filter properties are shown in Table 1. Spinning workability and felt productivity were good. In addition, the mechanical strength of the felt was good at warp: 903 N / 5 cm and weft: 1508 N / 5 cm, and improvement in mechanical strength was confirmed. The outlet dust concentration, which is an index of dust collection performance, is 0.15 mg / m 3 , is good, and the improvem...

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Abstract

Provided is a polyphenylene sulfide short fiber having a monofilament fineness of 0.70 to 0.95 dtex, a strength of 4.5 to 5.5 cN / dtex, a fiber length of 20 to 100 mm, and a melt flow rate (MFR) valueof 200 to 295 g / 10 min. This polyphenylene sulfide short fiber enables improvements to be made in the dust collection performance and mechanical strength without impairing the fiber productivity or felt productivity.

Description

technical field [0001] The present invention relates to polyphenylene sulfide short fibers suitable for bag filters and bag filters. Background technique [0002] Polyphenylene sulfide (hereinafter, sometimes abbreviated as PPS) resin has excellent heat resistance, barrier properties, chemical resistance, electrical insulation and heat and humidity resistance and other properties suitable for engineering plastics, used for injection molding, extrusion It is used for various electrical parts, electronic parts, mechanical parts, automobile parts, films and fibers, etc. mainly out of molding. [0003] For example, PPS materials are widely used in filter cloths used in various industrial filters such as bag filters for exhaust gas dust collection. As such a filter cloth, the filter cloth which laminated|stacked PPS short fiber to the base fabric produced from the short fiber yarn of PPS short fiber, and needle-punched and integrated it is mentioned. [0004] Such a filter clot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/76B01D39/16D04H1/4326D04H1/4382
CPCB01D39/16D04H1/4326D04H1/43838D01F6/765D01D5/22D01D5/12D01D5/26D02J1/22D02G1/12B32B7/09B01D39/083B01D39/1623B01D46/0001B01D46/02B01D2239/0613B01D2239/0618B01D2239/0659B01D2239/10B01D2239/1225B01D2239/1233B01D2239/1291B01D2275/10B32B5/022B32B5/024B32B5/26B32B37/0084B32B37/16B32B2250/03B32B2262/02D01F6/76D10B2331/301D10B2505/04
Inventor 杉本武司光永怜央森达哉小林祐真
Owner TORAY IND INC
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