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US 2022/0030937 A1Published application
Catalyst introduction methods for accelerated deacetylation of cellulose esters
AssigneeAcetate International LLC
InventorsMichael COMBS, Cody PARKER, Amber MILLER
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Abstract
Disclosed herein is a degradable cigarette filter comprising a cellulose ester and including a catalyst comprising a basic material, an enzymatic material, or combinations thereof. The catalyst, when exposed to water, may deacetylate the bloomed cellulose acetate tow by at least 10% in 20 days or less. The filters described herein therefore degrade more rapidly than other known cellulose acetate tow filters.
Claims20
A degradable cigarette filter comprising:
- a filter element comprising bloomed cellulose acetate tow, wherein the cellulose acetate has a degree of substitution (DS) of greater than 1.3;
- a catalyst comprising a basic material, an enzymatic material, or combination thereof;
- and
- a plug wrap at least partially surrounding the filter element;
- wherein the catalyst is incorporated into at least one of the filter element, the plug wrap, or combinations thereof, and
- wherein the catalyst, when exposed to water, deacetylates the bloomed cellulose acetate tow by at least 10% in 20 days or less.
3 more elements
A tow bale comprising a plurality of cellulose acetate fibers and at least one fiber comprising a catalyst.
Dependencies are inferred from the claim text.