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High-temperature-resistant PTFE membrane filter material and production method thereof

A membrane-coated filter material and production method technology, applied in membrane filters, separation methods, chemical instruments and methods, etc., can solve the problems of poor high temperature resistance and poor filtration effect, and achieve good insulation and increased filtration area. , the effect of excellent electrical insulation and heat resistance

Active Publication Date: 2021-05-07
中材科技膜材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of poor initial filtration effect and poor high-temperature resistance of traditional filter materials, the present invention provides a high-temperature-resistant PTFE-coated filter material and its production method. The PTFE-coated filter material has good heat resistance, large filtration area, Good filtering effect

Method used

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  • High-temperature-resistant PTFE membrane filter material and production method thereof
  • High-temperature-resistant PTFE membrane filter material and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 Shown is a high-temperature-resistant PTFE-coated filter material. The high-temperature-resistant PTFE-coated filter material includes PTFE microporous membrane 1 and needle-punched felt from top to bottom, and the needle-punched felt includes the first sulfonamide fiber from top to bottom. Layer 2, glass fiber cloth 3 and the second polysulfone fiber layer 4, wherein the pore diameter of the PTFE microporous membrane 1 is 1 μm, the porosity is 80%, the film thickness is 150 μm, and the upper surface of the PTFE microporous membrane 1 is processed at intervals There are several rows of raised structures 5, and each row of raised structures 5 is composed of several four-edged trusses, the height of which is 75 μm, and the distance between two adjacent rows of raised structures 5 is 5 cm;

[0031] The high temperature resistant PTFE coated filter material is prepared according to the following production method:

[0032] S1: Preparation of PTFE microporo...

Embodiment 2

[0042]A high-temperature-resistant PTFE-coated filter material. The high-temperature-resistant PTFE-coated filter material includes a PTFE microporous membrane 1 and a needle-punched felt from top to bottom, and the needle-punched felt includes a first polysulfone fiber layer 2 from top to bottom. , glass fiber cloth 3 and the second sulfonamide fiber layer 4, wherein the pore diameter of the PTFE microporous membrane 1 is 1 μm, the porosity is 60%, and the film thickness is 100 μm, and the upper surface of the PTFE microporous membrane 1 is processed with several A row of raised structures 5, the lower surface of the PTFE microporous membrane 1 corresponds to the position of the upper surface of the raised structures 5 is provided with a concave structure 6, each row of raised structures 5 is composed of a number of quadrangular pyramids, the height of the pyramids is 25 μm, two adjacent rows The interval between the raised structures 5 is 9cm;

[0043] The high temperature r...

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Abstract

The invention relates to the technical field of filter materials, and in particular, relates to a high-temperature-resistant PTFE membrane filter material and a production method thereof. The high-temperature-resistant PTFE membrane filter material comprises a PTFE microporous membrane and a needled felt from top to bottom, and the needled felt sequentially comprises a first polysulfonamide fiber layer, glass fiber cloth and a second polysulfonamide fiber layer from top to bottom; protruding structures are processed on the upper surface of the PTFE microporous membrane at intervals, and each protruding structure is composed of a plurality of three-dimensional patterns. The production method comprises the steps that: the PTFE microporous membrane, the first polysulfonamide fiber layer and the second polysulfonamide fiber layer are prepared respectively; after the first polysulfonamide fiber layer, the glass fiber cloth and the second polysulfonamide fiber layer are stacked in sequence, a middle felt is manufactured through the needling technology; the middle felt is subjected to heat setting, singeing and pressing, dipping and baking curing treatment, and the needled felt is obtained; and the PTFE microporous membrane and the needled felt are pressed and laminated. The PTFE membrane filter material disclosed by the invention is good in heat resistance, large in filter area and good in filter effect.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a high-temperature-resistant PTFE-coated filter material and a production method thereof. Background technique [0002] The bag filter is a dry dust filter device, which is suitable for collecting fine, dry, non-fibrous dust. The filter material of the traditional bag filter is generally made of textile filter cloth or non-woven needle felt. The dust removal mechanism is "deep filtration" technology, that is, in the early stage of filtration, a layer of powder cake is formed on the surface of the filter bag through the collection of dust by the filter material fiber, and then this layer of powder cake is used as the main filter layer to filter the dust. The disadvantage of this method is that, because the filter material itself has relatively large pores, part of the dust in the initial stage of filtration will pass through the filter material and be discharged, resultin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/00
CPCB01D39/14B01D46/0001B01D2275/10Y02A50/2351
Inventor 白亚飞徐正琦白杨赵绪忠张明远钱明亮李金凯
Owner 中材科技膜材料(山东)有限公司