| 摘要 |
<p>Microfibrous, polymeric sheets and filter elements prepared therefrom comprising a normally hydrophobic, microfibrous, polymeric web, wherein the surfaces of the microfibrous making up the web are coated with a cured, precipitated cationic, thermosetting binder resin or polymer, which elements are hydrophilic and have a positive zeta potential.</p><p>The corresponding process comprises
<UnorderedLists id="ula01" listStyle="none"><ListItem>(1) applying a solution of a precipitating agent to a hydrophobic web;</ListItem><ListItem>(2) applying a binder resin to the web of step (1);</ListItem><ListItem>(3) working the web of step (2) to mix the agent and binder, thereby facilitating the precipitation of the binder resin and the distribution of the precipitated binder resin as a coating on the surface of the microfibers of the web; and</ListItem><ListItem>(4) curing the web of step (3) to form desired filter elements.</ListItem></UnorderedLists></p> |
