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Multi-layer composite for use in an air filter

An air filter and composite technology, applied in the direction of membrane filter, filtration separation, dispersed particle filtration, etc., to achieve the effect of small thickness, high rigidity, and small unit area weight

Active Publication Date: 2010-03-24
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of this prior art is that the multilayer composite has piercing points for its manufacture, which increase the permeability of dust particles
Furthermore, it is disadvantageous that for the production of such multilayer composites, only relatively thick fibers with a fineness that permit carding of the fibers can be used.

Method used

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  • Multi-layer composite for use in an air filter
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  • Multi-layer composite for use in an air filter

Examples

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Embodiment Construction

[0040] figure 1 Shown is a scanning electron microscope image of a multilayer composite for use in air filters, in particular filter bags, which has an inflow layer 1 made of a fleece. The inflow layer 1 has a finer porous structure than the support layer 2 . The inflow layer 1 is designed as a spunbonded fleece whose endless filaments 3 are at least partially interwoven or woven with the carrier layer 2 . The carrier layer 2 is designed as a spunbond fleece, the endless filaments 4 of which have a larger mean diameter than the mean diameter of the endless filaments 3 of the inflow layer 1 . The endless filaments 3 of the inflow layer 1 are interwoven with the support layer 2 by means of a water jet treatment. Both the inlet layer 1 and the support layer 2 are made of a spunbonded nonwoven produced by extrusion spinning.

[0041] The inflow layer 1 has endless filaments 3 with an average diameter of 0.3 μm to 10 μm. according to figure 1 The multilayer composite has 272g / ...

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Abstract

The invention relates to a multi-layer composite for use in an air filter, comprising at least one upstream ply (1) and a support ply (2) that is connected to the upstream ply. The upstream ply (1) is made of a non-woven fabric and has a finer porosity than the support ply (2). The aim of the invention is to form and further develop a multi-layer composite for use in an air filter, in particular in a filter bag in such a manner that the upstream ply can be connected in a stable and economical manner to the support ply. Said invention is characterised in that the upstream ply (1) is embodied as a spun bonded non-woven, the continuous filaments (3) of which are at least partially twisted or interwoven with the support ply (2).

Description

technical field [0001] The invention relates to a multi-layer composite for use in an air filter, said multi-layer composite comprising at least one inflow layer and a support layer combined with said inflow layer, wherein said inflow layer is made of non-woven fabric As a result, the porous structure / porosity / porosity of the inflow layer ( ) is smaller than the support layer. Background technique [0002] Multilayer composites of this type are used in filter bags and bag filter devices. Bag filter units are frequently used in power stations to clean dust / dust-laden gases. A plurality of filter bags are arranged in a bag filter arrangement, the filter bags being clamped to a carrier on the clean gas side. Dust is trapped on the raw gas side of the filter bag as it flows through the filter bag from the raw gas side to the clean gas side. The purified gas reaches the purification side through the filter bag. [0003] This type of filter bag becomes clogged with filter ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16
CPCB01D2275/10D04H3/11B01D39/02B01D46/02B01D2239/065B01D39/163B01D2239/0663B32B5/022B32B5/06B32B5/26D04H3/016Y10T428/249922Y10T442/611Y10T442/614Y10T442/66Y10T442/663Y10T442/681Y10T442/689
Inventor H·曼施泰因R·格罗滕A·霍林斯沃思I·埃瓦尔德J·亨德勒K·维瑟尔
Owner CARL FREUDENBERG KG
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