Cleanable wide-width air filtering composite membrane as well as preparation method and application thereof

Abstract

The invention provides a cleanable wide-width air filtering composite membrane which comprises a membrane material body and ultrasonic indentations uniformly arranged on the membrane material body, the thickness of the membrane material body without the ultrasonic indentations is greater than that of the membrane material body with the ultrasonic indentations; the membrane material body comprisesa supporting layer I, a heavy ion microporous membrane layer and a supporting layer II which are made of the same material, the supporting layer I is ultrasonically compounded on the lower surface ofthe heavy ion microporous membrane layer, and the supporting layer II is ultrasonically compounded on the upper surface of the heavy ion microporous membrane layer. The cleanable wide-width air filtering composite membrane can be applied to a mask or protective clothing or an air purifier or an air conditioner filtering function structure. Ultrasonic compounding is adopted, the heavy ion microporous membrane is successfully used as a filter layer to prepare a composite membrane, and a support material and the heavy ion microporous membrane material which are the same are compounded together, so that the composite mechanical strength and the air permeability of the material are ensured, the cleanable requirement is met, the composite membrane can be repeatedly used after being washed, the use cost is saved, and the filtering effect is good.

Description

technical field [0001] The invention relates to the field of materials, in particular to a washable wide-width air filter composite membrane and its preparation method and application. Background technique [0002] When the dust, bacteria, and viruses in the air increase, it will have a serious impact on people's daily life. The existing air filter materials (such as masks) generally use melt-blown polypropylene (PP cotton), which is generally divided into three layers, the upper and lower layers are PP non-woven fabrics, and the middle layer is melt-blown PP cotton. The characteristics of PP cotton are Large porosity, it can effectively filter fine particles through electrostatic adsorption. But PP cotton has obvious disadvantages and cannot touch water. After contact with water, the electrostatic adsorption effect will be lost, which will affect the filtration efficiency, so generally protective products containing PP cotton cannot be washed with water. Moreover, even w...

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Problems solved by technology

[0004] The invention provides a washable wide-width air filter composite membrane and its preparation method and application, which effectively solves the technical problems of existing filter materials such as inability to wash with water, short service life, poor protection effect, etc.

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