Degradable cigarette filter: pill with multilayered coating
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United States of America Patent
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Mar 19, 2013
Grant Date -
Jul 21, 2011
app pub date -
Jan 15, 2010
filing date -
Jan 15, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A degradable cigarette filter includes a filter element of a bloomed cellulose acetate tow and a plug wrap surrounding the filter element, and a pill dispersed in the tow. The pill includes a material adapted to catalyze hydrolysis of the cellulose acetate tow that is encapsulated with an inner layer of a water soluble or water permeable material and an outer layer of a cellulose acetate having a D.S. in the range of 2.0-2.6.
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Family
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