Hydrophilic polyfluortetraethylene microporous membrane folding type filter element

Abstract

The invention relates to a hydrophilic polyfluortetraethylene microporous membrane folding type filter element which comprises a filtering medium layer, an inner supporting barrel and an outer supporting barrel, wherein the filtering medium layer is folded into fins and then wound on the outer circumference of the inner supporting barrel, the folding line of the filtering medium layer is parallel to the axial direction of the inner supporting barrel, the outer supporting barrel is sleeved at the outer side of a barrel formed by the filtering medium layer, the filtering medium layer is formed by overlapping a layer of long-fiber nonwoven fabric, a layer of thin short-fiber nonwoven fabric, a layer of hydrophilic polyfluortetraethylene microporous filter membrane and a layer of planar flow guide net, wherein the thin short-fiber nonwoven fabric is arranged at the upstream of the filter membrane, the long-fiber nonwoven fabric is arranged at the upstream of the thin short-fiber nonwoven fabric, the planar flow guide net is arranged at the downstream of the filter membrane, and the radial end surfaces of the two arbitrary adjacent fins are respectively in welding connection. The short-fiber nonwoven fabric plays the roles of prefiltering and protecting the filter membrane, and the dirt holding capacity of the filter element is increased; the long-fiber nonwoven fabric enhances the spalling resistance of the folding layer; and the planar flow guide net reduces the fluid resistance, improves the flow of the filter element and also overcomes the problem that the fiber falls off.

Description

Technical field: [0001] The invention relates to liquid purification technology, in particular to a liquid sterilizing and particulate removal device, in particular to a hydrophilic polytetrafluoroethylene microporous membrane folded filter element. Background technique: [0002] A large number of filter devices and different filter media are used in pharmaceutical fermentation, bioengineering, food and beverage, modern chemical industry, electronics industry, environmental protection and other industries for bacteria removal, particle removal and other liquid purification applications. In the field of microporous filtration, pleated filter elements are commonly used in filtration devices. The filter medium of the pleated filter element is made of polymer materials, but the chemical compatibility, weather resistance and temperature resistance of different polymer materials are quite different. The commonly used polytetrafluoroethylene microporous filter membrane has excelle...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of hydrophilic polytetrafluoroethylene microporous membrane pleated filter element, described this kind of hydrophilic polytetrafluoroethylene microporous membrane pleated filter element to solve the problem of ethanol and other third parties in the prior art The medium enters the liquid and the fibers of the downstream protective layer fall off, resulting in technical problems such as low dirt holding capacity, short life and low flow rate of the pleated filter element

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