| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a hollow cigarette filter having no fiber fragment in an internal hollow area, promptly while using cellulose acetate as a material.SOLUTION: A hollow cigarette filter member 6 is formed from a material containing cellulose ester and an ester plasticizer, not through a fiber shape but by a thermoforming such as a molten extrusion molding or a compression molding or the like under heating. |
