Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Filter material with membrane and filter element made of such filter material
US2025288933A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025288933-A1 |
| Application number | US-202519079628-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 14, 2025 |
| Priority date | Mar 18, 2024 |
| Publication date | Sep 18, 2025 |
| Grant date | — |
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- Title
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Abstract
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A filter material for air filtration in a filter element. The filter material includes a prefilter layer on an inflow side, an activated carbon layer, and a composite layer. The composite layer is formed with at least one membrane layer. The prefilter layer, the activated carbon layer and the composite layer are materially bonded to each other.
First claim
Opening claim text (preview).
1 . A filter material for air filtration in a filter element, comprising: a prefilter layer on an inflow side; an activated carbon layer; and a composite layer, which is formed with at least one membrane layer, wherein the prefilter layer, the activated carbon layer and the composite layer are materially bonded to each other. 2 . The filter material according to claim 1 , wherein the prefilter layer and/or the composite layer are electrostatically charged. 3 . The filter material according to claim 1 , wherein the activated carbon layer is provided with a permanently sticky adhesion network. 4 . The filter material according to claim 1 , wherein the filter material has an additional coarse filter layer. 5 . The filter material according to claim 4 , wherein the prefilter layer or the coarse filter layer form a carrier for the activated carbon layer. 6 . The filter material according to claim 1 , wherein the activated carbon layer comprises activated carbon particles glued to each other. 7 . The filter material according to claim 1 , wherein the filter material has the following structure: a prefilter layer on the inflow side, a composite layer on an outflow side and an activated carbon layer located in between. 8 . The filter material according to claim 1 , wherein the filter material has the following structure: the prefilter layer on the inflow side, a coarse filter layer an outflow side with the activated carbon layer applied thereon and the composite layer located in between, wherein the prefilter layer and the composite layer are configured as a materially bonded unit. 9 . The filter material according to claim 1 , wherein the filter material has the following structure: the prefilter layer on the inflow side, the composite layer on an outflow side and at least one coarse filter layer located in between, wherein the activated carbon layer is applied upstream on a first coarse filter layer of the at least one coarse filter layers. 10 . The filter material according to claim 1 , wherein a plurality of the composite layer, the activated carbon layer, and the prefilter layer of the filter material have a progressive structure. 11 . A filter element with the filter material according to claim 1 , wherein the filter material is pleated and wherein edge bands or frame elements are attached to the pleated filter material.
Assignees
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Classifications
Carbon, e.g. graphite particles · CPC title
Adsorption filters, e.g. activated carbon · CPC title
using interposed adhesives or interposed materials with bonding properties · CPC title
Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class · CPC title
comprising polyurethanes · CPC title
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- What does patent US2025288933A1 cover?
- A filter material for air filtration in a filter element. The filter material includes a prefilter layer on an inflow side, an activated carbon layer, and a composite layer. The composite layer is formed with at least one membrane layer. The prefilter layer, the activated carbon layer and the composite layer are materially bonded to each other.
- Who is the assignee on this patent?
- Freudenberg Carl Kg
- What technology area does this patent fall under?
- Primary CPC classification B01D46/62. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Sep 18 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).