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High-performance pps fiber structure and production method and use thereof (as amended)

a polyphenylene sulfide, fiber technology, applied in the direction of fibre treatment, physical treatment, weaving, etc., can solve the problems of asbestos fibers having severe hazards in production practices, asbestos diaphragms may have non-uniform pore size, poor gas impermeability, etc., to achieve low gas impermeability, small and uniform pore size, and high gas impermeability

Inactive Publication Date: 2018-09-06
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a high-performance PPS fiber structure with better gas impermeability and hydrophilicity. This structure is made using a simple process that saves energy and is environmentally safe. The use of small and uniform pore sizes in the fabric overcomes the drawbacks of non-uniform pore size and low gas impermeability in previous methods. The PPS fiber structure can be used in various applications such as diaphragms for electrolytic apparatuses, high-temperature liquid filter materials, and insulating materials.

Problems solved by technology

However, as the industrialization process is advanced and the technology is developed further, it is gradually recognized that asbestos diaphragms have some drawbacks in production practice.
Though asbestos is non-hazardous in itself, a severe hazard is incurred by the asbestos fibers, which are fibers that are extremely fine and almost invisible to naked eyes.
Though such a replacement can solve the problems of pollution and low gas impermeability, the obtained diaphragms may have non-uniform pore size and poor gas impermeability if the fineness of the fibers used to weave PPS diaphragm cloth is inappropriate and the ratio of the twist of single yarns to the twist of plied yarns is improper.
In that invention, owing to the fact that the liquid absorption rate of the non-woven cloth is relatively high, a large quantity of valuable water resource and chemicals have to be consumed in the washing process after the non-woven cloth is processed with the strong acid, the washing time is long, the technological operations are complex, and pollution to the environment may occur.
Besides, the process is not suitable for use in industrial production owing to its poor safety.
However, the gas impermeability of the obtained diaphragm in that invention is poor, owing to improper fineness of the fibers and improper ratio of the twist of single yarns to the twist of plied yarns.
Besides, the PPS diaphragm cloth processed through the plasma hydrophilic treatment process can't truly meet the production demand owing to its poor hydrophilicity and poor durability.
Though the gas impermeability of the diaphragm cloth meets the requirements of the standard for asbestos diaphragms, the obtained diaphragm cloth has poor hydrophilicity and can't truly meet the application requirements, owing to the poor water absorptivity of the above-mentioned chemical fibers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055]Round PPS fibers in 10 μm cross sectional diameter are processed through scutching—carding—drawing—roving—fine yarns—winding—thermoforming procedures to obtain PPS single yarns with yarn count equal to 40 s, twist equal to 81 T / 10 cm, and twist factor equal to 311; the obtained PPS single yarns are span through a cotton spinning process including winding—doubling—twisting—thermoforming procedures to obtain PPS yarns with ply number equal to 4, warp twist and weft twist equal to 45 T / 10 cm respectively, and twist factor equal to 346, wherein, the ratio of the twist of the PPS yarns to the twist of the single yarns is 0.56; the obtained PPS yarns are used as warp yarns and weft yarns and woven on a loom to obtain grey cloth with tabby having density in warp direction equal to 55.3 yarns / inch and density in weft direction equal to 48.0 yarns / inch; the obtained grey cloth is processed by scouring, water washing, drying and thermoforming at 180° C., and then the thermoformed PPS wo...

example 2

[0056]The PPS yarns obtained in the Example 1 are treated with 98% concentrated sulfuric acid at 90° C. for 3 min. to obtain, hydrophilic PPS yarns with grafting ratio equal to 1.8%. The obtained hydrophilic PPS yarns are used as warp yarns and weft yarns and woven on a loom to obtain grey cloth with tabby having density in warp direction equal to 55.0 yarns / inch and density in weft direction equal to 48.7 yarns / inch; the obtained grey cloth is processed by scouring, water washing, drying, and thermoforming at 180° C.; and then the thermoformed PPS woven fabric is sulfonated. Finally, a PPS fiber structure with cover factor equal to 2520, thickness equal to 0.63 mm, maximum pore size equal to 15 μm, average pore size equal to 3.0 vim (pores in 6 μm or smaller diameter account for 95% or above of all pores in the woven fabric), area resistance R equal to 1.3 mΩ·cm2, and strength in warp direction and strength in weft direction equal to 750 N / 3 cm and 521 N / 3 cm respectively is obtain...

example 3

[0057]Round PPS fibers in 8 μm cross sectional diameter are processed through scutching—carding—drawing—roving—fine yarns—winding—thermoforming procedures to obtain PPS single yarns with yarn count equal to 60 s, twist equal to 90 T / 10 cm, and twist factor equal to 282; the obtained PPS single yarns are span through a cotton spinning process including winding—doubling-twisting—thermoforming procedures to obtain PPS yarns with ply number equal to 6, warp twist and weft twist equal to 44 T / 10 cm respectively, and twist factor equal to 338, wherein, the ratio of the twist of the PPS yarns to the twist of the single yarns is 0.49; the obtained PPS yarns are used as warp yarns and weft yarns and woven on a loom to obtain grey cloth with tabby having density in warp direction equal to 66.3 yarns / inch and density in weft direction equal to 39.0 yarns / inch; the obtained grey cloth is processed by scouring, water washing, drying and thermoforming at 180° C., and then the thermoformed PPS wov...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The present invention discloses a high-performance PPS fiber structure and production method and use thereof. The high-performance PPS fiber structure is woven fabric made from PPS fibers in 0.1 to 12 μm cross sectional diameter, and the maximum pore size of the PPS fiber structure is 20 μm or smaller. The PPS fiber structure disclosed in the present invention has the advantages of high gas impermeability and good hydrophilicity, also has the advantages of simple process, low energy consumption and zero environmental pollution, and can be used in diaphragms for electrolytic apparatuses, high-temperature liquid filter materials and insulating materials.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is the U.S. National Phase application of PCT / CN2016 / 096309, filed Aug. 23, 2016, which claims priority to Chinese Patent Application No. 201510521999.9, filed Aug. 24, 2015, the disclosures of these applications being incorporated herein by reference in their entireties for all purposes.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to a high-performance polyphenylene sulfide (PPS) fiber structure and production method and use thereof.BACKGROUND OF THE INVENTION[0003]Diaphragm cloth is the main core material of water electrolyzers. Water-electrolytic hydrogen generators and oxygen generators are widely applied in military, petrochemical, and iron and steel making fields. At present, major manufacturers of alkaline water-electrolytic hydrogen generators in China still use asbestos cloth as diaphragm. However, as the industrialization process is advanced and the technology is developed further, it is gradually rec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D03D15/00D06M10/08D03D13/00D04H1/435D03D15/283D03D15/30D03D15/60
CPCD03D15/0083D06M10/08D03D13/008D04H1/435D10B2331/301D03D1/00D10B2401/022D10B2505/04D03D15/37D03D15/50D03D15/573D03D15/41D03D15/30D03D15/283
Inventor SHI, YANFANGYANG, LILIXU, JIE
Owner TORAY IND INC
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