Melt-blowing filtering material with three-dimensional twisted fiber structure and preparation method of melt-blowing filtering material

Abstract

The invention relates to a melt-blowing filtering material with a three-dimensional twisted fiber structure and a preparation method of the melt-blowing filtering material. The melt-blowing filteringmaterial with the three-dimensional twisted fiber structure comprises a coarse filtering part, a supporting part and a fine filtering part which are sequentially connected by needling from top to bottom. The preparation method of the melt-blowing filtering material comprises the following steps: firstly, preparing the coarse filtering part; secondly, preparing the supporting part; thirdly, preparing the fine filtering part; fourthly, sequentially arranging the coarse filtering part, the supporting part and the fine filtering part from top to bottom to form a filtering material with a sandwichstructure; fifthly, needling the filtering material with the sandwich structure at the needling depth of 5 to 7mm and the needling density of 390 to 480 needles / cm<2>; connecting all parts of the filtering material to obtain the melt-blowing filtering material with the three-dimensional twisted fiber structure. The melt-blowing filtering material disclosed by the invention has the advantages thatspecial surface area of the inner part of a fiber network is increased, and mechanical properties are excellent; the preparation method has the advantages of simplicity, convenience, low cost, high production efficiency, better filtering performance and small reluctivity change.

Description

technical field [0001] The invention relates to a melt-blown filter material with a three-dimensional twisted fiber structure and a manufacturing method thereof. Background technique [0002] With the rapid development of industry, pollution also arises, especially air pollution has been listed as one of the three major pollutions in the world, with great harm and impact. Inhalation of low-quality air damages health and induces various diseases. Filter materials have become a necessary product in industry and life. The techniques for producing filter materials include: weaving, knitting, non-woven, electrospinning, etc. [0003] In the prior art, the types of fibers used to prepare air filter materials mainly include melt-blown fibers, spunbond fibers, and electrospun fibers. The cross-sectional shape of the melt-blown fibers is generally circular. Generally, conventional PP melt-blown fibers are used in the preparation of air filter materials. The efficiency and resistanc...

AI Technical Summary

Problems solved by technology

Generally, conventional PP melt-blown fibers are used in the preparation of air filter materials. The efficiency and resistance are average. The internal specific surface area of ​​the fiber net is small and the mechanical properties are poor. It cannot meet the fine filtration requirements of PM2.5 and other pollutants.