Filter material in the form of flexible leaves or sheets and a method of producing such material
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United States of America Patent
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Jun 29, 1993
Grant Date -
N/A
app pub date -
Apr 9, 1990
filing date -
Apr 11, 1989
priority date (Note) -
Expired
status (Latency Note)
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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.
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