US 2024/0100463 A1 · FOLDED FILTER MEDIUM

Abstract

A folded filter medium for a filter element is provided with a cellulose substrate impregnated with a phenolic resin and furthermore provided with an ePTFE layer arranged on the cellulose substrate. A filter element with such a filter medium is provided. A filter assembly with a filter element having such a filter medium is also provided. A method for producing such a filter medium includes the steps of impregnating the cellulose substrate with the phenolic resin; applying the ePTFE layer onto the cellulose substrate impregnated with the phenolic resin; folding the cellulose substrate with the ePTFE layer applied thereon; and curing the phenolic resin.

Claims17

Dependent claims

A folded filter medium for a filter element, the folded filter medium comprising:

a cellulose substrate impregnated with a phenolic resin;
and
an ePTFE layer arranged on the cellulose substrate.

Dependencies are inferred from the claim text.

Facts

Application

18/532,242Filed 7 Dec 2023

Priority

DE 102021115022.110 Jun 2021

Published

28 Mar 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification19 codes

B01D 39/1692
Of organic material, e.g. synthetic fibres: other shaped material, e.g. perforated or porous sheets
B01D 46/522
Using folded, pleated material: with specific folds, e.g. having different lengths
B01D 39/18
Of organic material, e.g. synthetic fibres: the material being cellulose or derivatives thereof
B01D 46/523
Using folded, pleated material: with means for maintaining spacing between the pleats or folds

Folded filter medium

Life of this patent

Folded filter medium

Life of this patent

Abstract

Claims17