Double-layer filter material, preparation method thereof and multilayer product

Abstract

The invention relates to the field of wet paper making, in particular to a double-layer filter material, a preparation method thereof and a multilayer material. The double-layer filter material consists of a coarse glass fiber layer and a fine glass fiber layer, wherein the thickness of the double-layer filter material is between 0.35 and 0.45mm; and the double-layer filter materials are compounded to prepare a multilayer filter material, or are compounded with nonwoven fabrics for filtering liquid. The preparation method comprises the steps of preparation of a coarse fiber layer semi-finished product and a fine fiber semi-finished product, preparation of a composite fiber layer semi-finished product and drying. In the double-layer filter material, the service life is prolonged to 133 percent, the filter efficiency is improved by 50 percent, and the resistance is reduced by 10 percent. The double-layer filter material can be compounded with the nonwoven fabrics and other filter materials once more to prepare a filter material with better performance and effectively filter impurities and microorganisms in the liquid; and the preparation method is easy to operate, has high yield, and is suitable for scale production.

Description

technical field [0001] The invention relates to the field of wet papermaking, in particular to a double-layer filter material, a preparation method thereof and a multi-layer product. [0002] Background technique [0002] Air filtration refers to the use of micropores formed inside the glass fiber to intercept, absorb and block particles above 0.01 μm to reduce the entry of particles into the protected space; it mainly removes dust, viruses, harmful gases, large particles, etc. in the air. The products are mainly used in VLSI, atomic power stations, radiation medicine, genetic engineering, computer mainframe, food processing, pharmaceuticals, biological isolation of viruses and many other fields. At present, there are ultra-high-efficiency glass fiber filter materials and inorganic films that can achieve this filtration in air filtration, but their service life is short; The service life of the glass fiber composite filter material is doubled, and the strong dust holdin...

AI Technical Summary

Problems solved by technology

Secondly, how to reduce resistance, increase filtration efficiency, and control costs through effective process and technological innovation is a technical problem existing in the domestic market. The increase in resistance means that under the same efficiency, the consumption of fans is greatly increased.

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