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Making method of high temperature-resistant filter material

The technology of a filter material and production method, which is applied in the field of filter materials, can solve the problems of limiting the use of polyphenylene sulfide fiber composite high-temperature-resistant filter materials, the decrease of the mechanical strength of filter materials, and the impact on the service life of filter bags, etc., to achieve a smooth and flat surface , Filtration performance improvement, the effect of filtration performance improvement

Active Publication Date: 2009-11-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high temperature resistant filter material is a three-layer composite structure with a base cloth in the middle. The needle punching process will cut off a large number of fibers and reinforce the base cloth, resulting in inevitable damage to the base cloth and fibers, which will eventually cause a decrease in the mechanical strength of the filter material and affect the quality of the final filter bag. In addition, the acupuncture process can easily cause uneven ventilation of the product, which limits the use of polyphenylene sulfide fiber composite high-temperature resistant filter materials

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

Embodiment 1

[0027] Yarns made from neutral glass fibers and yarns made from polyphenylene sulfide fibers were used to prepare woven fabrics (100 g / m 2 ), the polyphenylene sulfide fiber was opened, mixed, and carded by two carding machines, and cross-laid to obtain two layers of fiber webs. The weight of the fiber webs was 150g / m 2 , top and bottom are laminated with woven fabrics, and after pre-needling, they are compounded by high-pressure spunlace technology. The pre-acupuncture needle density is 4000 / m, the acupuncture frequency is 500 times / min, and the needle punching speed is 5m / min. During the spunlace process, the front and back sides of the composite material are pre-spunlaced with a spunlace pressure of 80 bar, and the speed of the mesh curtain is 5m / min. The net curtain speed is 5m / min. After the three-layer composite material strengthened by spunlace is singeed on the front and back sides, it is then impregnated with 10% polytetrafluoroethylene emulsion, and pressed to make ...

Embodiment 2

[0030] The yarns made of neutral glass fibers and the yarns made of polyphenylene sulfide fibers were used to make woven fabrics (150g / m 2 ), the polyphenylene sulfide fiber is opened, mixed and carded by two carding machines, and cross-laid to obtain a two-layer fiber web. The surface density of the upper and lower layers of the fiber web is 200g / m 2 , top and bottom are laminated with woven fabrics, and after pre-needling, they are compounded by high-pressure spunlace technology. The needle density of the pre-needling cloth is 4000 / m, the needling frequency is 600 times / min, and the mesh speed is 3m / min. During the spunlace process, the front and back sides of the composite material are pre-spunlaced with 80bar and 100bar spunlace pressure, and the mesh speed is 3m / min, and then the front side of the composite material is spunlaced with 175bar high-pressure spunlace pressure. Spunlaced four times on the reverse side, the mesh speed is 3m / min, singeing the front and back sid...

Embodiment 3

[0033] Yarns made from alkaline glass fibers and yarns made from polyphenylene sulfide fibers were used to prepare woven fabrics (140 g / m 2 ), the polyphenylene sulfide fiber is opened, mixed and carded by two carding machines, and cross-laid to obtain a two-layer fiber web, and the surface density of the upper fiber web is 230g / m 2 , the quality of the lower fiber web is 230g / m 2 , top and bottom are laminated with woven fabrics, and after pre-needling, they are compounded by high-pressure spunlace technology. The needle density of the pre-acupuncture cloth is 4000 / m, the needling frequency is 550 times / min, and the mesh curtain speed is 4m / min. During the spunlace process, the front and back sides of the composite material are pre-spunlaced with a spunlace pressure of 90bar, and the mesh speed is 4m / min, and then the front and back sides of the composite material are punctured four times with a high-pressure spunlace pressure of 180bar. , the speed of the net curtain is 4m...

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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PUM

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Abstract

The invention provides a making method of a high temperature-resistant filter material, characterized in specific steps of mixing glass fiber and polyphenylene sulphide between which the weight ratio is 1:1 to 1:5, weaving into a substrate cloth of which the density is 100 to 170g / m, respectively placing a polyphenylene sulphide fiber net of which the density is 150 to 350g / m on upper and lower sides to obtain a three-layer composite material of which the density is 400 to 800g / m; pre-needling the three-layer composite material, spunlacing to pre-wet at high pressure, spunlacing the front and back faces to reinforce for 4 to 8 times, condensation resisting, and finishing to obtain the high temperature-resistant filter material. The high temperature-resistant filter material has good high temperature-resistance, long service life and high filtering performance.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a method for manufacturing a high-temperature-resistant filter material composited with polyphenylene sulfide fibers and glass fibers processed by a water jet process. Background technique [0002] Polyphenylene sulfide (PPS) fiber is a high-temperature-resistant fiber with excellent performance. It has excellent strength, rigidity and fatigue resistance at high temperatures. It has been widely used in the manufacture of high-temperature resistant filter materials in recent years. [0003] At present, the patents applied for polyphenylene sulfide PPS fiber high temperature filter materials are: [0004] The application number is 200620042264.4, a utility model patent for "polyphenylene sulfide PPS corrosion-resistant permeable membrane filter felt", which provides a PPS fiber base cloth and upper and lower layers of PPS fiber nets, which are processed by need...

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): B01D39/14
Inventor 柯勤飞靳向煜吴海波殷保璞吴丽丽
Owner DONGHUA UNIV
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