Filter material in the form of flexible leaves or sheets and a m

Details Filter material in the form of flexible leaves or sheets and a m Filter material in the form of flexible leaves or sheets and a m

1990-04-09

1993-06-29

Dawson, Robert A.

Liquid purification or separation

Filter

Material

210508, 210509, 55527, 1621575, B01D 3902

Patent

active

052231399

ABSTRACT:
A flexible fleece-like filter material is provided wherein in a matrix-like basic framework consisting of synthetic or natural fibres, ultra-finely fibrillated fibres and/or inert porous particles are incorporated as a filter medium, the filter medium forming, anchored in the matrix, chain structures provided with a cationic or anionic charge or possibly charged with other substances which influence the filtering properties or with immobilised cells and/or catalysts. A fleece is formed with a thickness of between 0.5 mm and 5 mm and preferably up to 2 mm, which is flexible and which can even be pleated. This filter material can be produced by a simple method without harming the environment.

REFERENCES:
patent: 3842007 (1974-10-01), Caputi, Jr. et al.
patent: 4110385 (1978-08-01), Sander et al.
patent: 4548677 (1985-10-01), Schneider et al.
patent: 4565727 (1986-01-01), Giglia et al.
patent: 4650506 (1987-03-01), Barris et al.
patent: 4925560 (1990-05-01), Sorrick
patent: 4976858 (1990-12-01), Kadaya

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