B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/110, 117/43
B01D 39/02 (2006.01) B01D 39/20 (2006.01)
Patent
CA 1190156
Abstract: Filter media comprised of charge modified, resin coated inorganic microfibers are prepared by mixing inorganic microfibers with an aqueous solution of a water soluble, noncolloidal cationic thermosetting binder resin to form a dispersion, following which a precipitating agent is added to precipitate the binder resin and coat the microfibers. The coated microfibers may be used in the dispersed or suspended form as a filter aid. Preferably they are formed into a filter sheet which is then dried and cured to form a filter sheet of narrowly distributed pore size, pore sizes as small as one-half micron, and having a positive zeta potential in alkaline media. Glass is the pre- ferred microfiber and polyamine-epichlorohydrins the preferred resins. By providing the normally negative zeta potential microfibers with a positive zeta poten- tial the binder resins used to coat the microfibers substantially enhance particulate removal capabilities of the microfiber filter sheet.
413608
Degen Peter J.
Foss Warren M.
Gsel Thomas C.
Joffee Irving B.
Pall David B.
Hewitt Neville S.
Pall Corporation
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