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Method for producing multi-layer filter medium and filter medium produced according to such method

A filter medium and filter layer technology, applied in the field of manufacturing multi-layer filter media, can solve the problems of reducing dirt receiving capacity, porosity and free open surface reduction

Pending Publication Date: 2022-03-11
HYDAC PROCESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the porosity and free open surfaces of the sintered fabric structure are significantly reduced, which means for the filtration process: reduced dirt-acceptance capacity at higher pressure losses

Method used

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  • Method for producing multi-layer filter medium and filter medium produced according to such method
  • Method for producing multi-layer filter medium and filter medium produced according to such method
  • Method for producing multi-layer filter medium and filter medium produced according to such method

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Embodiment Construction

[0028] figure 1 A preferred embodiment of the filter medium according to the invention using five layers 10 , 12 and 14 , 16 and 18 is shown in cross section. The diagram is idealized, since to some extent two of the five layers are thus no longer present in their original configuration due to the bond. according to figure 1 The filter medium itself is a three-dimensional fabric body, the layers 10, 12 are constructed from warp and weft threads 20, 22, whereas the layers 16 and 18 consist of a spunbond nonwoven. The fabric layers 10, 12 consisting of warp and weft threads 20, 22 are preferably implemented in a plain weave and the individual filaments 20, 22 of each layer 10, 12 delimit individual penetration sites 24 with a square cross section, as exemplified in image 3 and Figure 4 in the direction of figure 1 The viewing direction of the underlying layer 12 is depicted. In the present embodiment in particular, the textile filter layer 10 is constructed identically to...

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PUM

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Abstract

The invention relates to a method for producing a multi-layer filter medium, comprising at least the following production steps: providing a fabric layer (12) having a penetration point (24) for a fluid; providing a non-woven fabric layer consisting of a spunbond non-woven fabric (18), the non-woven fabric layer having further penetration sites (28) for the fluid; and connecting the two stacked layers (12, 18) along the contact point (30) by melting the nonwoven fabric layer (18), in this way, the molten spunbonded nonwoven fabric material runs at least partially to a contact point while increasing the further penetration point (28) and produces a fixed connection point between the two layers (12, 18) in a cumulative and then hardened manner at the contact point.

Description

technical field [0001] The invention relates to a method for producing a multilayer filter medium and to a filter medium produced according to this method. Background technique [0002] Corresponding production methods are known in many embodiments together with the associated filter media. [0003] Thus, DE 10 2013 000 932 A1 shows a filter medium, in particular provided for a hydraulic filter, which filter medium has at least one layer comprising at least one first structure and at least one further second structure, the first structure With warp threads and weft threads, the second structure has predeterminable filter properties, and the corresponding first structure is formed at least partially from multifilaments in the form of twisted threads. [0004] A multi-layer filter medium for filtering fluids is known from DE 10 2013 000 933 A1, said filter medium having at least one support layer, a filter layer and a drainage layer, in order to increase the flow channel form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08
CPCB01D39/08B01D2239/10B01D2239/065B01D39/10B01D39/1623B01D2239/0668B01D2239/0627B01D2239/0654B01D39/083B01D2239/1233D03D15/67D03D1/00D10B2505/04D03D13/004
Inventor B·施里希特M·温特
Owner HYDAC PROCESS TECH