发明名称 |
Charge-modified microfiber filter sheets |
摘要 |
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 preferred microfiber and polyamine-epichlorohydrins the preferred resins. By providing the normally negative zeta potential microfibers with a positive zeta potential the binder resins used to coat the microfibers substantially enhance particulate removal capabilities of the microfiber filter sheet.
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申请公布号 |
US4523995(A) |
申请公布日期 |
1985.06.18 |
申请号 |
US19810312723 |
申请日期 |
1981.10.19 |
申请人 |
PALL CORPORATION |
发明人 |
PALL, DAVID B.;DEGEN, PETER J.;JOFFEE, IRVING B.;FOSS, WARREN M.;GSELL, THOMAS C. |
分类号 |
B01D39/14;B01D39/20;B01J20/28;B01J20/30;(IPC1-7):B01D13/00 |
主分类号 |
B01D39/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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