| 摘要 |
<p>PURPOSE:To enable sufficient removal of noxious gases contained in smoke of tobacco by containing a composition containing a specific metal coexisting with a reaction product of the metal with hydroxypolybasic acids in a fibrous filter for the tobacco. CONSTITUTION:(A) One or more metals selected from among Fe, Mn, Cr, Ni, Zn, Al and Cu are made to react with (B) hydroxypolybasic acids (e.g. ascorbic acid or citric acid) to produce a composition composed of the reaction product containing the existing unreacted component (A). The resultant composition having stronger air cleaning power than that of conventional active carbon and characteristics of lasting air cleaning power is then contained in a fibrous filter to produce a tobacco filter. Deodorizing power especially for H2S-based malodorous gases can be more improved by further coexistence of a base (e.g. calcium hydroxide) in the aforementioned composition.</p> |
