Filter segment including a substrate loaded with a smoke-modifying agent

Patent metadata

Field	Value
Publication number	US-10244788-B2
Application number	US-95268210-A
Country	US
Kind code	B2
Filing date	Nov 23, 2010
Priority date	Nov 23, 2009
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A filter segment for use in a filter of a smoking article includes a substrate loaded with at least one smoke-modifying agent. The substrate is located within the body of the filter segment and is formed from filter plug wrap having an air permeability ranging from about 6,000 Coresta units to about 24,000 Coresta units.

First claim

We claim:

1. A filter segment for use in a filter of a smoking article, the filter segment comprising:
a substrate loaded with menthol solution, the substrate located within a body of the filter segment and formed from a filter plug wrap having an air permeability ranging from about 7,500 Coresta units to about 20,000 Coresta units and a grammage ranging from about 25 g/m 2 to about 80 g/m 2 , and the filter plug wrap capable of absorbing more than 100 percent of its weight of menthol solution, and the substrate including a ball of the filter plug wrap, a pellet of the filter plug wrap, or both a ball of the filter plug wrap and a pellet of the filter plug wrap.

2. The filter segment of claim 1 , wherein the substrate is colored.

3. The filter segment of claim 1 , wherein the body includes a plug of cellulose acetate tow.

4. The filter segment of claim 3 , wherein the cellulose acetate tow has a denier per filament of about 1.5 to about 8 and a total denier of about 15,000 to about 46,000.

5. The filter segment of claim 1 , wherein the filter segment has a resistance to draw of about 70 mm H 2 O.

6. The filter segment of claim 1 , wherein the filter segment includes a first end and a second end, and wherein a mouth end filter segment having lower filtration efficiency than the filter segment is attached to the first end with tipping paper.

7. The filter segment of claim 6 , wherein the mouth end filter segment has a resistance to draw of about 20 mm H 2 O or less.

8. The filter segment of claim 6 , further including at least one circumferential row of perforations at a location therealong which is at least 12 mm from a mouth end of the mouth end filter segment.

9. The filter segment of claim 6 , further including a rod end filter segment attached to the second end with tipping paper, the rod end filter segment including one or more filtration materials, one or more sorbents, one or more catalysts, one or more flavorants, or a combination thereof.

10. The filter segment of claim 9 , wherein the rod end filter segment has a higher filtration efficiency than the filter segment.

11. The filter segment of claim 9 , wherein the rod end filter segment has a lower filtration efficiency than the filter segment.

Assignees

• Besso Clement
• Kuersteiner Charles
• Philip Morris Usa Inc

Inventors

• Besso Clement
• Kuersteiner Charles

Classifications

• A24D3/048 Primary

  containing additives · CPC title

• A24D3/062

  characterised by structural features · CPC title

• A24D3/14

  of organic materials as additive (of ion exchange materials A24D3/12) · CPC title

• A24D3/0212 Primary

  Applying additives to filter materials · CPC title

• A24D3/063

  of the fibers · CPC title