| 摘要 |
<p>A tobacco-smoke filter contains, as adsorbent for volatile tobacco-smoke constituents, a macroporous amine-type anion-exchange resin which contains substantially primary amino groups only, for instance a cross-linked polyvinyl aromatic compound such as polystyrene cross-linked with divinyl benzene. Advantageously the resin is used in particulate form between fibrous, filamentary or paper filter sections or dispersed in tow. The resin may be half-neutralised with acetic acid or admixed with solid acid.</p> |
