| 摘要 |
PROBLEM TO BE SOLVED: To provide a degradable cigarette filter in which a degradation agent is not added into a cellulose acetate tow during its manufacture.SOLUTION: A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow, a plug wrap surrounding the filter element, and either a coating or a pill in contact with the tow. The coating and/or pill may be composed of a material adapted to catalyze hydrolysis of the cellulose acetate tow and a water-soluble matrix material. The material may be an acid, an acid salt, a base and/or a bacterium adapted to generate an acid. When water comes into contact with the water-soluble matrix material, the material adapted to catalyze hydrolysis is released and catalyzes the hydrolysis and subsequent degradation of the cellulose acetate tow. |
