| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that conventional filtration equipment is not effective in removing a toxic substance and, e.g. a conventional tobacco filter unrelated to the presence or absence of active carbon synthesized from cellulose acetate is not effective for reducing its toxicity level and carcinogenic compounds reach a smoker, and to improve a filer so as to remove toxic and dangerous compounds from gas. SOLUTION: The new use of Pini Resina for removing the toxic substance from the gas is provided. The tobacco filter is composed of a filter layer containing the Pini Resina removing the toxic substance produced from burning tobacco. COPYRIGHT: (C)2004,JPO
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