Degradable cigarette filters

Inactive Publication Date: 2009-02-05
PHILIP MORRIS USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]Another object of the present invention is a cigarette filter of biodegradabl

Problems solved by technology

The cellulose acetate filaments therein tend to degrade slower than tobacco and/or th

Method used

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  • Degradable cigarette filters

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Example

[0015]The cigarette filters of the present invention may be made of sheets, films, fiber bands, yarns, or non-wovens from biodegradable materials such as paper (wood pulps), wool, cellulose acetate with lower acetylating levels, starch, and starch based polymer composites, cotton, polyactic acid, polyvinyl alcohol, polyhyroxyalkanoates, polyesters, polyesteramides, polycaprolactones, un-stabilized polypropylene, micro-glass materials, and their combinations. The biodegradable materials can be spun into fibers by melt spinning, dry spinning, wet spinning, electro spinning or any other known process into fibers.

[0016]For example, PHBV (Polyhydroxybutyrate-co-hydroxyvalerate) and its blends with aliphatic aromatic polyester such as Ecoflex, PBS (poly butylenes succinate), d-, 1-, and dl-PLA (polyactic acid) and starch composites have been successfully spun into round cross section fibers by melt spinning process. However, in order to increase the surface area and reduce material use pe...

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Abstract

Biodegradable cigarette filters comprise shaped fiber of PHBV. Included among these fiber shapes in cross section are Y, V, C, Triad, 4-DG and JC shapes. The shaped fibers may include micro cavities with adsorbents and/or flavorants in the cavities.

Description

CROSS REFERENCE RELATED TO APPLICATION [0001]The present application claims the benefit of provisional application Ser. No. 60 / 953,296, filed Aug. 1, 2007, for all useful purposes, and the specification and drawings thereof are included herein by reference.BACKGROUND OF THE INVENTION [0002]The present invention relates to degradable cigarette filters, and more particularly to shaped fibers made from degradable materials and the use of such shaped fibers in cigarette filters.[0003]Conventional cigarette filter plugs are made of cellulose acetate fibers bonded to each other by triacetin. After smoking, the spent filters are sometimes discarded in the environment. The cellulose acetate filaments therein tend to degrade slower than tobacco and / or the paper parts of the cigarettes, often contributing to the litter in the environment. To reduce such litter, there is a need to replace cellulose acetate filaments in cigarette filters with materials that degrade faster than cellulose acetate...

Claims

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Application Information

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IPC IPC(8): A24D3/08
CPCA24D3/064A24D3/163A24D3/08A24D3/068A24D3/16
Inventor XUE, LIXIN L.PARRISH, MILTON E.GEDEVANISHVILI, SHALVAYANG, SZU-SUNG
Owner PHILIP MORRIS USA INC
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