Glass fiber and PTFE (Polytetrafluoroethylene) fiber blended filter material and preparation method thereof

Abstract

The invention provides a glass fiber and PTFE (Polytetrafluoroethylene) fiber blended filter material. The glass fiber and PTFE fiber blended filter material comprises a polytetrafluoroethylene microporous membrane layer, a polytetrafluoroethylene dipping treatment layer, and a glass fiber and fiber blended expanded fabric layer which are arranged in sequence from a dust surface and a clean air surface, wherein the polytetrafluoroethylene dipping treatment layer is characterized in that the dipping treatment temperature is higher than 300 DEG C, PTFE is in a half-molten state under the high temperature, and thus the glass fibers can be adhered with the PTFE fibers. According to the glass fiber and PTFE fiber blended filter material, both weft and warp yarns of the filter material are the glass fiber and PTFE blended yarns, the PTFE fiber content is controlled to be 55 to 60wt%, and thus the flexibility and folding resistance of the filter material are obviously improved, the coating fastness is high, the air permeability is outstanding, and the filtering precision is high; in addition, the filter material also shows a filtering effect, and is resistant to high temperature and corrosion, high in service life, low in cost, and applicable to working conditions with complex smoke components, high temperature and serious corrosion.

Description

technical field [0001] The invention relates to a blended filter material and a preparation method thereof, in particular to a glass fiber and PTFE fiber blended filter material and a preparation method thereof. Background technique [0002] Waste incineration and other biomass power generation, coal-fired boilers, chemical industry and other industries produce flue gas with high temperature and complex composition, containing corrosive and harmful substances such as acid, alkali and heavy metals, which require high comprehensive indicators of high-temperature filter materials. [0003] It is required that the filter material has good temperature resistance, and long-term exposure to high temperature will not reduce its strength and cause damage to the filter bag. It is required that the filter material has good corrosion resistance, oxidation resistance, acid resistance, hydrolysis resistance, high temperature non-hygroscopicity, and good chemical stability. The filter mat...

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Problems solved by technology

[0004] At present, the comprehensive performance of glass fiber, polyphenylene sulfide, polyimide, aramid and other fibers used in the field of high-temperature filtration is poor, and cannot meet the actual needs of filtration under the above-mentioned high-temperature working conditions; PTFE has good comprehensive performance, but due to Its high price limits the scope of application

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