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US 10,300,419 B2Granted
Filter medium, filter element and filter arrangement
AssigneeMann+Hummel GmbH
InventorsAndreas Scope, Alexander Piry, David Keerl
Life of this patent
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Abstract
A filter medium is provided with a first filter layer that retains particles and a second filter layer provided with an antimicrobial material and an anti-allergenic material. The anti-allergenic material contains polyphenols. The filter medium is designed particularly for filtering air for the passenger compartment of motor vehicles.
Claims23
A filter medium comprising:
- a first filter layer configured to retain particles;
- a second filter layer comprising an antimicrobial material and further comprising an anti-allergenic material;
- and
- an adsorption layer comprising active carbon as an adsorber;
- wherein the adsorption layer is arranged immediately between the first filter layer and the second filter layer;
- wherein the active carbon is hydrophobic active carbon in which, at a relative humidity of the air of 50%, has a water absorption capacity of <10 percent by mass.
3 more elements
Dependencies are inferred from the claim text.