| 摘要 |
PROBLEM TO BE SOLVED: To provide a cigarette filter that can achieve both strength when dry and disintegrability when wet.SOLUTION: A cigarette filter includes a filter plug containing short cellulose ester fibers, pulp, and an alkali metal salt of a water-soluble anionic polymer. The alkali metal content in the filter plug is 2-100 μmol per 1 g of the filter plug. The water-soluble anionic polymer may be at least one kind selected from polyacrylic acids, and polysaccharides having a carboxyl group. |
