DEGRADABLE FILTER FOR SMOKING ARTICLES

• US 20150189913A1
• Filed: 07/11/2013
• Published: 07/09/2015
• Est. Priority Date: 07/13/2012
• Status: Abandoned Application

• Current Assignee: Philip Morris Products SA (Philip Morris Limited)
• Original Assignee: Philip Morris Products SA (Philip Morris Limited)
• Inventors: Jordil, Yves, Binassi, Enrico
• Application Number:
  US14/412,086
• Publication Number:
  US 20150189913A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A24D 3/04 Tobacco smoke filters characterised by their shape or structure
• CPC Class Codes: A24D 3/063 of the fibers
• CPC Class Codes: A24D 3/068 Biodegradable or disintegrable
• CPC Class Codes: A24D 3/10 of cellulose or cellulose derivatives
• CPC Class Codes: A24D 3/18 Mouthpieces for cigars or cigarettes; Manufacture thereof A24D3/02 takes precedence; making tipping materials for, or attaching them to mouthpieces of, cigars or cigarettes A24C5/56; producing cigar or cigarette holders from plastics or from substances in a plastic state B29D23/14; manufacture from metal, see the relevant subclasses of Section B

Abstract

A filter (14) for a smoking article (10) comprises a segment of filtration material (16), the filtration material (16) comprising randomly oriented regenerated cellulose fibres and cellulose acetate fibers. The filtration material (16) further comprises triacetin. The filter (14) also includes a wrapper (18) circumscribing the segment of filtration material (16).

Claims

1. A filter for a smoking article, the filter comprising:

a segment of filtration material, the filtration material comprising randomly oriented regenerated cellulose fibres and cellulose acetate fibers, the filtration material further comprising triacetin; and

a wrapper circumscribing the segment of filtration material.

2. The filter of claim 1, wherein the filtration material further comprises a low molecular weight polyether.

3. The filter of claim 1, wherein the filtration material comprises additional fibres selected from the group consisting of silk, cotton, polyester, linen, nylon, wool and combinations thereof

4. The filter of claim 1, wherein the triacetin is present in an amount of 1% to 15% by weight of the filtration material.

6. The filter of claim 2, wherein the low molecular weight polyether comprises polyethylene glycol.

7. The filter of claim 6, wherein the polyethylene glycol has a number average molecular weight of between 200 and 3600.

8. The filter of claim 1, wherein the regenerated cellulose fibres are crimped staple fibres.

9. The filter of claim 8, wherein the crimped staple fibres have a stretched length of between 10 mm and 30 mm under a tension of between 5 cN/denier and 10 cN/denier.

10. The filter of claim 8 or 9, wherein the crimped staple fibres have a denier of between 0.5 and 8.0 and a crimped rate of between 3 and 10 curves per 10 mm fibre length.

11. The filter of claim 1, wherein the regenerated cellulose fibres are Lyocell fibres.

12. The filter of claim 1, wherein the wrapper comprises a dissolvable plug wrap consisting of a sheet of polymeric material, wherein the polymeric material comprises at least one water-soluble polymer.

13. A smoking article comprising:

an aerosol-forming substrate; and

a mouthpiece secured in axial alignment with the aerosol-forming substrate, the mouthpiece comprising a filter according to claim 1.

5. A filter for a smoking article, the filter comprising:

a segment of filtration material, the filtration material comprising randomly oriented regenerated cellulose fibres and a low molecular weight polyether; and

a wrapper circumscribing the segment of filtration material.

14. A smoking article comprising:

an aerosol-forming substrate; and

a mouthpiece secured in axial alignment with the aerosol-forming substrate, the mouthpiece comprising a filter according to claim 5.

15. The filter of claim 5, wherein the low molecular weight polyether comprises polyethylene glycol.

16. The filter of claim 15, wherein the polyethylene glycol has a number average molecular weight of between 200 and 3600.

17. The filter of claim 5, wherein the regenerated cellulose fibres are crimped staple fibres.

18. The filter of claim 17, wherein the crimped staple fibres have a denier of between 0.5 and 8.0 and a crimped rate of between 3 and 10 curves per 10 mm fibre length.

19. The filter of claim 5, wherein the regenerated cellulose fibres are Lyocell fibres.

20. The filter of claim 5, wherein the wrapper comprises a dissolvable plug wrap consisting of a sheet of polymeric material, wherein the polymeric material comprises at least one water-soluble polymer.