Moulded filter media comprising a sheet of porous nonwoven...

B - Operations – Transporting – 01 – D

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Details

B01D 39/14 (2006.01) B01D 25/12 (2006.01) B01D 39/16 (2006.01) B01D 39/20 (2006.01) B01D 67/00 (2006.01) B01D 69/10 (2006.01)

Patent

CA 2302589

A moulded filter medium, e.g. a filter cloth comprises a sheet of porous nonwoven material (1) which is pre-moulded and pre-formed to conform to and snugly fit into the recesses and contours of a filter press plate. The sheet may comprise sintered partially fused particles of plastics, metal or ceramic or a cast acrylic or methacrylic resin or polymer sheet, or a coagulated polymer or microporous foam. The cloth may include a support structure such as a perforated membrane or mesh (3) or a spiral link fabric (12) embedded in the sheet.

L'invention concerne un milieu filtrant moulé, par exemple une toile filtrante, qui comporte une feuille de matière poreuse non tissée (1), laquelle est prémoulée et préformée pour s'adapter, en ajustement serré, dans des renfoncements et aux contours d'une plaque de presse à filtre. La feuille peut être constituée par des particules frittées partiellement fondues de plastique, de métal ou de céramique, ou par une feuille polymère ou résineuse acrylique ou méthacrylique coulée, ou par une mousse microporeuse ou polymère coagulée. La toile peut comprendre une structure de support telle qu'une membrane ou une maille (3) perforée ou un tissu de liaison hélicoïdal (12) incorporé dans la feuille.

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