Filter Medium and Use of Filter Medium

A technology of filter medium and filter layer, applied in filtration separation, membrane filter, dispersed particle filtration, etc., can solve problems such as pressure rise

Inactive Publication Date: 2017-08-08
MANN HUMMEL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The blockage results in an increased pressure rise

Method used

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  • Filter Medium and Use of Filter Medium
  • Filter Medium and Use of Filter Medium
  • Filter Medium and Use of Filter Medium

Examples

Experimental program
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Embodiment Construction

[0028] The figures show examples only and are not to be construed as limiting.

[0029] figure 1 An exemplary embodiment of a filter medium 1 according to the invention is shown with a matrix layer 2 and with at least one cover layer 3 arranged on the inflow side on the matrix layer, said matrix layer being formed as a layer of cellulose fibers The first fiber layer in the form of the cover layer is configured as a second fiber layer. The cover layer 3 can preferably have at least 25% lower fiber content of cellulose fibers relative to the matrix layer. Particularly preferably, the fiber content of the cellulose fibers, based on the total fiber content of the cover layer 3 , is 35% less than the fiber content of the cellulose fibers, based on the total fiber content of the matrix layer 2 . However, the cover layer 3 can also be formed entirely from non-cellulose fibers.

[0030] The substrate layer 2 is preferably configured as a finely porous paper containing cellulose fib...

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Abstract

The invention relates to a filter medium and a use of the same. Concretely, the filter medium (1) has at least a first filter layer as a substrate layer (2) and a second filter layer as a cover layer (3), wherein the cover layer is arranged at an inflow side relative to the substrate layer. The substrate layer (2)contains a proportion of cellulose fibers of at least 60% relative to a total fiber contents of the substrate layer. The cover layer(3) contains a proportion of polymeric synthetic fibers and / or mineral fibers of at least 20% relative to a total fiber contents of the cover layer. The substrate layer (2)has a maximum thickness of 0.28 mm. The filter medium has a total air permeability according to ISO 9237 that amounts to more than 45 l / m3. The fibers of the cover layer (3)have a packing density of 0.08 to 0.16 and the fibers of the substrate layer (2)have a greater packing density than the fibers of the cover layer(2).

Description

technical field [0001] The invention relates to a filter medium according to the preamble of claim 1 and to the use of said filter medium. Background technique [0002] Document DE 10 2012 010 307 A1 describes a filter medium for liquid filtration. The filter medium has a wet-laid fleece made of cellulose fibres, synthetic fibers or inorganic fibres, and a pre-filter layer. [0003] In the case of cellulose-containing air filter media, the pores in the cellulose-containing matrix layer can be partially clogged during the initial stages of filtration by dust contained in the air. The clogging leads to an increased pressure rise. Contents of the invention [0004] Starting from this prior art, it is the object of the present invention to provide a filter medium which has a smaller tendency for clogged pores, but at the same time is relatively thin and has a good degree of separation. [0005] The invention solves this object by a filter medium having the features of claim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/04B01D39/16B01D39/18B01D39/20B01D46/00B01D46/30
CPCB01D39/04B01D39/16B01D39/18B01D39/20B01D46/00B01D46/30B01D2258/06B32B5/08B32B1/00B32B2262/14B32B2307/72B32B2307/732B01D39/1623B01D39/2017B01D2239/064B01D2239/0654B01D2239/1258B01D2275/10B32B5/26B32B2250/20B32B2262/0276B32B2262/062B32B2262/101B32B2307/724B01D46/62B01D39/14B01D46/521B01D2279/60
Inventor P.黑特坎普J.韦伯
Owner MANN HUMMEL GMBH
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