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Air Filter Media, Air Filter Assemblies, and Air Filter Units

一种空气过滤器、滤材的技术，应用在空气过滤器滤材领域，能够解决压力损失上升等问题，达到抑制堵塞的效果

Active Publication Date: 2021-09-07
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In recent years, in the air filter media, especially the air filter media for medical and pharmaceutical clean rooms, there are problems as follows: not only the clogging caused by the dust suspended in the air will increase the pressure loss, but also the oil mist ( clogging caused by oil particles) will also increase the pressure loss

Method used

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  • Air Filter Media, Air Filter Assemblies, and Air Filter Units
  • Air Filter Media, Air Filter Assemblies, and Air Filter Units
  • Air Filter Media, Air Filter Assemblies, and Air Filter Units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4、 comparative example 1

[0139]

[0140] According to the combination shown in Table 1, the first 1PTFE porous membrane, porous film and said first 2PTFE air-permeable fiber layer to the first fiber layer air-permeable, porous film of 1PTFE, air-permeable fiber layer 3, the porous 2PTFE film, laminated in this order a second air-permeable fiber layer, and allowed to heat lamination and was heated to 80 deg.] C between a pair of rollers, having prepared Image 6 The same air filter medium is a laminated structure.

[0141] For the obtained air filter medium, the pressure loss was measured by the following method, collection efficiency, PAO trapping amount, NaCl trapping amount.

[0142]

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PUM

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Abstract

An air filter medium (10) includes a first porous PTFE membrane (1) and a second porous PTFE membrane (2). The air filter material (10) has a first main surface (11) and a second main surface (12), and the first PTFE porous membrane (1) and the second PTFE porous membrane (12) are configured such that the first main surface (11) The airflow passing to the second main surface (12) passes through the first porous PTFE membrane (1) and the second porous PTFE membrane (2) in this order. On the surface of the first PTFE porous membrane (1), the proportion of the area occupied by the nodes is in the range of 1.5 to 3.0%, and the average value of the area of ​​the nodes is 200 μm 2 above.

Description

Technical field [0001] The present invention relates to an air filter filter using polytetrafluoroethylene (hereinafter referred to as "PTFE") porous membrane. Background technique [0002] In the past, the PTFE porous membrane was used as an air filter material in various fields. The PTFE porous membrane excellent in dust capture performance is well suited to use less dust (for example, in clean room). However, when filtration of the atmospheric dust used for external gas treatment or turbine is filtered, the suspension dust is captured only on the surface layer of the PTFE porous film, and the result, sometimes blocking to block the pressure loss. rise. Therefore, the following attempts are made, that is, by setting the gas permeability member such as a nonwoven fabric as the upstream side of the air stream, the large dust is pre-captured, preventing the PTFE porous film from clogging and seeking air. Long Life of Filter Filter (Patent Document 1). However, in the air filter ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/16B01D46/52B01D71/36
CPCB01D46/52B01D63/14B01D69/02B01D71/36B01D39/1692B01D2239/0668B01D2239/1208B01D2239/1216B01D2239/1258B01D2239/10B01D39/16C08J9/00C08J9/0004
Inventor 仁木隆志森将明和田志穗大门敦柳俊辉
Owner NITTO DENKO CORP