METHOD OF FILTERING ELEMENT PRODUCTION AND FILTERING ELEMENT Russian patent published in 2009 - IPC B01D71/02 

FIELD: treatment facilities.

SUBSTANCE: invention relates to the method of filtering element production and to a filtering element, namely to a membrane filter. The filtering element production method involves the following procedures: applying membrane layer (1) to carrier body (2), etching of membrane chamber (3) on that side of carrier body (2) which is opposite to membrane layer (1) thus residual layer (5) of carrier body (2) remains, making pinholes (6) in membrane layer (1) to obtain a holed membrane, removing residual layer (5) by etching to release membrane layer (1). The feature of novelty consists in the fact that membrane layer (1) at stage S1 or later is subject to the additional treatment for the mechanical strength improvement in order to make it have a crystalline structure with the mechanical strength greater than that of the basic material of membrane layer (1) and/or a compacted structure as well as to create mainly internal mechanical prestress in it.

EFFECT: filtering element with high throughput capacity remains mechanically stable and withstands pressure loads including pressure fluctuations during its long service life.

31 cl, 5 dwg