发明申请
- 专利标题: DEGRADABLE CIGARETTE FILTER
- 专利标题(中): 可降级香烟过滤器
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申请号: PCT/US2008/085294申请日: 2008-12-03
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公开(公告)号: WO2009079202A1公开(公告)日: 2009-06-25
- 发明人: ROBERTSON, Raymond, M. , THOMAS, William, C.
- 申请人: CELANESE ACETATE LLC
- 申请人地址: 1601 West LBJ Freeway Dallas, TX 75234 US
- 专利权人: CELANESE ACETATE LLC
- 当前专利权人: CELANESE ACETATE LLC
- 当前专利权人地址: 1601 West LBJ Freeway Dallas, TX 75234 US
- 代理机构: HAMMER, Robert, H., III
- 优先权: US61/014,210 20071217; US12/135,264 20080609
- 主分类号: A24D3/10
- IPC分类号: A24D3/10
摘要:
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. The coating may be applied to the tow, the plug wrap, or both. The pill may be placed in the filter element. When water contacts 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. The foregoing is also applicable to articles made of cellulose esters.