Filtering material and application thereof

A filter material and fabric technology, applied in the direction of filtration separation, separation/purification of carboxylic acid compounds, carboxylate preparation, etc., can solve the problems of short material replacement cycle, small flux, low elongation, etc., and achieve mechanical properties Superior, good filtering effect, high breaking strength

Inactive Publication Date: 2010-12-22
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the filter materials used in filter elements in the general liquid filtration industry are mostly polypropylene (PP), polyester (PET), nylon (NYLON) fabrics, etc., but the filter materials of these materials have low strength, are not wear-resistant, and are not Disadvantages of high temperature resistance; In the high temperature filtration industry, there are inorganic filter media and organic filter media. The inorganic media are mainly glass fibers, and the organic media are mainly polytetrafluoroethylene (PTFE) and chlorotrifluoroethylene (PCTFE). It has defects such as small flux and uneven pore size distribution.
Due to the harsh conditions, high temperature and strong corrosiveness in the production process of terephthalic acid and purified terephthalic acid, it is necessary to use liquid filter materials with high temperature resistance and corrosion resistance. The filter materials currently used are generally Ethylene-tetrafluoroethylene copolymer (ETFE), fusible tetrafluoroethylene (PFA), tetrafluoroethylene and hexafluoropropylene copolymer (FEP) and other materials, but these materials are easy to wear and tear during the filtration process, and the material replacement cycle Short, the filtration performance cannot meet the production requirements, and the cost is high
[0003] Chinese patent CN101244353 discloses a glass-fluorine composite high-temperature-resistant filter material and its manufacturing method. Its composition includes special high-temperature-resistant glass fiber woven cloth and polytetrafluoroethylene fiber net; Low, but due to its shortcomings of low wear resistance and uneven pore size, it cannot be adapted to the requirements of filter materials used in the manufacturing process of terephthalic acid and purified terephthalic acid

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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  • Filtering material and application thereof
  • Filtering material and application thereof
  • Filtering material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The PPS monofilament (manufactured by Toray Co., Ltd.) with an average fiber diameter of 36 μm is warped, and the warp density is 2235 / 10cm, the weft density is 1948 / 10cm, and the organization is 1 / 3 twill weaving, and the warp density is 2127 The PPS monofilament twill fabric with threads / 10cm and weft density of 1925 threads / 10cm can be used as a filter material for liquid filtration in the production process of PTA or TPA. The characteristics of this filter material were evaluated and are shown in Table 1.

Embodiment 2

[0037] The PPS monofilament (manufactured by Toray Co., Ltd.) with an average fiber diameter of 120 μm is warped, and the warp density is 800 / 10cm, the weft density is 660 / 10cm, and the organization is 1 / 3 twill weaving, and the warp density is 766 The PPS monofilament twill fabric with threads / 10cm and weft density of 650 threads / 10cm can be used as a filter material for liquid filtration in the production process of PTA or TPA. The characteristics of this filter material were evaluated and are shown in Table 1.

Embodiment 3

[0039]Warp the PPS filaments (manufactured by Toray Co., Ltd.) with a total fiber fineness of 220dtex*6 and a single filament diameter of 7 μm. The warp density is 173 / 10cm, the weft density is 118 / 10cm, and the weave is 1 / 1 Weaving the plain weave to obtain a PPS filament plain weave fabric with a warp density of 184 / 10cm and a weft density of 127 / 10cm. The resulting fabric can be used as a filter material for liquid filtration in the production process of PTA or TPA. The characteristics of this filter material were evaluated and are shown in Table 1.

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Abstract

The invention discloses a filtering material and application thereof. The filtering material comprises at least one layer of fabric which contains polyphenylene sulfide fibers, wherein a bubble point ranges from 10 to 500mu m; and an average flowing aperture is 0.1 to 400mu m. The products of the invention have high temperature and medicament resistance, good filtering effect and excellent mechanical property, and can enlarge the application range of filtering cloth and further prolong the service life of the filtering cloth. The filtering cloth can be widely applied to liquid filtering in the fields, such as chemical industry, water treatment and the like, and is mainly used for the liquid filtering in a production process of pure terephthalic acid (PTA) or terephthalic acid (TPA).

Description

technical field [0001] The invention relates to a filter material and its application. Background technique [0002] At present, the filter materials used in filter elements in the general liquid filtration industry are mostly polypropylene (PP), polyester (PET), nylon (NYLON) fabrics, etc., but the filter materials of these materials have low strength, are not wear-resistant, and are not Disadvantages of high temperature resistance; In the high temperature filtration industry, there are inorganic filter media and organic filter media. The inorganic media are mainly glass fibers, and the organic media are mainly polytetrafluoroethylene (PTFE) and chlorotrifluoroethylene (PCTFE). It has defects such as small flux and uneven pore size distribution. Due to the harsh conditions, high temperature and strong corrosiveness in the production process of terephthalic acid and purified terephthalic acid, it is necessary to use liquid filter materials with high temperature resistance a...

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(China)
IPC IPC(8): B01D39/08C07C63/26C07C51/347C07C51/42
Inventor 周松伟山本英行
Owner TORAY FIBER RES INST(CHINA) CO LTD
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