High-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material and preparation method thereof

Abstract

The invention provides a high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material and a preparation method thereof. The filter material disclosed by the invention is formed by compounding a PTFE (Polytetrafluoroethylene) high-compactness microporous membrane layer and a punched felt in sequence from top to bottom. The punched felt is formed by compounding a first polysulfonamide fiber surface layer, a high-intensity low-stretchability base cloth layer and a second polysulfonamide fiber surface layer in sequence from top to bottom. The preparation method comprises steps of: preparation of the punched felt, high-temperature thermoforming, singeing and pressing treatment, full-saturation immersion treatment, predrying, baking curing, and high-temperature high-pressure coating with the PTFE high-compactness microporous membrane. The high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material has high intensity and low stretchability, longitude and latitude strengths are both larger than 3000N / 50mm; the longitude and latitude elongations at break are both smaller than 10%; and the filter material can resist a high temperature grade of 250 DEG C and has high corrosion resistance, good oxidization resistance, smooth surface, high deashing efficiency and wide application range.

Description

technical field [0001] The invention relates to a high-strength and low-elongation polysulfone fiber high-temperature-resistant film-coated filter material and a preparation method thereof, belonging to the field of filter materials. Background technique [0002] At present, among the organic synthetic fibers used in the production of high-temperature-resistant smoke and dust filter materials, polysulfone fibers are one of the few domestic synthetic fibers that can withstand temperatures above 200°C and have independent intellectual property rights. [0003] So far, some scientific research institutes and a few enterprises have done a lot of research on the performance improvement of polysulfone fibers in bag filter materials through industry-university-research channels. Most of the filter materials are polysulfone fibers and other high-temperature-resistant fibers. Blended filter materials are mainly used, and the research focus is mainly on the stability analysis of sulfo...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-strength and low-elongation polysulfone fiber high-temperature-resistant film-coated filter material and its preparation method to solve the problems of low strength, large elongation, and poor filtration accuracy in existing polysulfone fiber filter materials in actual use. High, poor corrosion resistance and other issues

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