WO2006067627A1 - Filter cigarette and method of making filter cigarette of an electrical smoking system - Google Patents

Filter cigarette and method of making filter cigarette of an electrical smoking system Download PDF

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Publication number
WO2006067627A1
WO2006067627A1 PCT/IB2005/004032 IB2005004032W WO2006067627A1 WO 2006067627 A1 WO2006067627 A1 WO 2006067627A1 IB 2005004032 W IB2005004032 W IB 2005004032W WO 2006067627 A1 WO2006067627 A1 WO 2006067627A1
Authority
WO
WIPO (PCT)
Prior art keywords
cigarette
set forth
web
tobacco rod
filter
Prior art date
Application number
PCT/IB2005/004032
Other languages
French (fr)
Other versions
WO2006067627A8 (en
Inventor
John R. Hearn
Wesley G. Sanderson
Barry S. Smith
Susan E. Wrenn
Original Assignee
Philip Morris Products S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US63786204P priority Critical
Priority to US60/637,862 priority
Application filed by Philip Morris Products S.A. filed Critical Philip Morris Products S.A.
Publication of WO2006067627A1 publication Critical patent/WO2006067627A1/en
Publication of WO2006067627A8 publication Critical patent/WO2006067627A8/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/28Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/282Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by indirect addition of the chemical substances, e.g. in the wrapper, in the case
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/28Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/285Treatment of tobacco products or tobacco substitutes by chemical substances characterised by structural features, e.g. particle shape or size
    • A24B15/286Nanoparticles
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00Chemical features or treatment of tobacco; Tobacco substitutes
    • A24B15/18Treatment of tobacco products or tobacco substitutes
    • A24B15/28Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/287Treatment of tobacco products or tobacco substitutes by chemical substances by inorganic substances only
    • A24B15/288Catalysts or catalytic material, e.g. included in the wrapping material
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/14Use of materials for tobacco smoke filters of organic materials as additive
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES
    • A24F47/00Smokers' requisites not provided for elsewhere, e.g. devices to assist in stopping or limiting smoking
    • A24F47/002Simulated smoking devices, e.g. imitation cigarettes
    • A24F47/004Simulated smoking devices, e.g. imitation cigarettes with heating means, e.g. carbon fuel
    • A24F47/008Simulated smoking devices, e.g. imitation cigarettes with heating means, e.g. carbon fuel with electrical heating means

Abstract

A cigarette (21a) of an electrical smoking system includes a filter tipping (33a) including a web (25) including added filtering material and a tubular wrapper (27) around the web, and a tobacco rod portion (43) adapted to generate a puff of smoke upon being heated by one or more io heating elements during smoking, the tobacco rod portion being attached to the filter tipping.

Description

FILTER CIGARETTE AND METHOD OF MAKING FILTER CIGARETTE OF AN ELECTRICAL SMOKING SYSTEM

BACKGROUND In cigarettes of the type used in electrical smoking systems such as are disclosed in commonly owned US 5 388 594 ; US 5 692 525 ; US 6 209 547 ; US 6 289 898 ; US 6 615 840 and US 6 888 313 , and in U . S . Application Publication No . 20030131859 , which patents and application publications are incorporated by reference in their entirety, it is generally desirable to duplicate aspects of the experience of smoking a regular cigarette , such as resistance to draw. However, the manner in which smoke is generated and air is drawn through the cigarette for the electrical smoking system is quite different from the way smoke is generated and air is drawn through a regular cigarette because of the vastly different physical structure of the smoking system versus the regular cigarette . It is desirable to provide cigarettes for use in electrical smoking systems having features that facilitate simulating the experience of smoking a regular cigarette .

SUMMARY

According to one embodiment , a cigarette for an electrical smoking system includes a filter tipping including a web including added filtering material and a tubular wrapper around the web, and a tobacco rod portion adapted to generate a puff of smoke upon being heated by at least one heating element during smoking, the tobacco rod portion being attached to the filter tipping .

According to another embodiment , a method for making a cigarette for an electrical smoking system includes making a filter tipping by surrounding a web including added filtering material with a tubular wrapper, and attaching a tobacco rod portion adapted to generate a puff of smoke upon being heated by at least one heating element during smoking to the filter tipping .

BRIEF DESCRIPTION OF THE DRAWINGS FIGS . IA-1C are cross-sectional side views of cigarettes according to various embodiments .

FIGS . 2A-2C show end views of a cigarette filter according to various embodiments . FIG . 3 shows a web having a three-dimensional shape being compressed and surrounded by a wrapper according to an embodiment .

FIG . 4 shows a cigarette filter that uses multiple webs according to an embodiment .

DETAILED DESCRIPTION

Cigarettes 21a-21c according to embodiments are shown in FIGS . IA-1C . The cigarettes all include a cigarette filter 23 including a web 25 including filtering material and a tubular wrapper 27 around the web . The cigarette 21 includes a cylindrical member, e .g . , a tobacco containing rod portion 37a-37c, for generating smoke attached to the cigarette filter . The cigarette 21 is of the type usable in an electrical smoking system such as is disclosed in commonly owned US 5 388 594 ; US 5 692 525 ; US 6 209 547 ; US 6 289 898 ; US 6 615 840 and US 6 888 313 , and in U . S . Application Publication No . 20030131859 , which patents and application publications ' are incorporated by reference in their entirety.

The cigarette filter 23 can replace or be used together with a free flow filter . Several possible, non-limiting arrangements of components are shown in FIGS . IA-1C . FIG . IA shows a cigarette 21a wherein a filter 23 is . disposed in a filter tipping 33a including the filter 23 positioned adj acent a filter plug 35 , which can be , for example , a conventional cellulose acetate tow filter . A tobacco rod portion 37a is attached to the tipping 33a and includes a free flow filter 39 , a void 41 or open space, and a tobacco plug 43 wrapped in a wrapper 45 that may include a tobacco web, although other arrangements can also be used. In the electrical smoking system, heat is applied to the wrapper 45 to heat tobacco (e . g . , the tobacco web and the tobacco plug 43 ) during puffing of the cigarette to thereby generate smoke . In addition to removing targeted constituents from smoke , using the filter 23 instead of or in addition to conventional tubular free-flow filters can facilitate ' adjustment of features of the cigarette such as resistance to draw (RTD) which can be useful in simulating the experience of smoking a traditional , lit-end cigarette . FIG . IB shows a cigarette 21b with a tipping 33b and tobacco rod portion 37b wherein the free flow filter 39 from the cigarette 21a is

eliminated. FIG. 1C shows a cigarette 21c with a tobacco rod portion

37c wherein the filter 23 is used together with a free flow filter 47 in the tipping 33c between the filter 23 and the filter plug 35. The foregoing are only several illustrative ones of numerous possible variations . There may be voids , free flow filters , filter plugs , tobacco plugs , and any other desired structures in the cigarette . In the cigarette filter 23 , the web 25 may include paper . The web 25 may include a coated paper, an impregnated paper, carbon paper, a laminate , or a laminate including paper . The web 25 may be formed into a non-planar shape , such as by folding or rolling or bending the web . As seen in FIG. 2A, the web 25 may be formed into an accordian shape . As seen in FIG. 2B, an accordian-shaped web 25 may be formed into a circular shape . As seen in FIG . 2C, the web 25 may be crimped and formed into any one of numerous possible shapes . As seen in FIG . 3 , the web 25 may be formed into any desired three-dimensional shape by a suitable forming apparatus 101 and then swaged or otherwise processed by a suitable compressing apparatus 103 to compress the shape . The web 25 may exert a force on the wrapper 27 to assist in maintaining a three-dimensional shape for the filter 23. The wrapper 27 may be made from a web but may be formed from any structure suited for providing an outer covering for the web 25 , such as a pre-formed tube .

The filtering material is any suitable material , such as a material that reacts with at least one constituent of cigarette smoke . The filtering material can include an aminopropylsilyl group covalently bonded to a non-volatile inorganic substrate . See , for example, commonly-owned US 6 209 547 , US 6 584 979 , and US 6 595 218 , which are hereby incorporated by reference . The aminopropylsilyl group is preferably a 3 -aminopropylsilyl group . The substrate is preferably silica gel or molecular sieve material . The material may be provided on a web 25 of paper or other suitable material . In accordance with an embodiment , the physical and chemical properties of the filler material used to produce webs 25 of paper for making filters 23 are chosen and utilized to reduce the aldehyde content of the smoke produced during combustion/pyrolysis of the smoking article . The paper filler includes an ammonium-containing compound, which when heated evolves ammonia, which may chemically react with aldehydes in tobacco smoke and/or modify the combustion/pyrolysis reactions thereby reducing the initial formation of aldehydes , thereby decreasing the delivery of such aldehydes to a smoker . The filtering material can be an ammonium containing compound filler used in the web . See, for example , commonly-owned US 6 289 898 and US 6 615 840 , which are incorporated by reference .

A suitable ammonium-containing compound is an inorganic ammonium metal salt , such as an ammonium-alkaline earth metal salt , such as MgNH4 PO4 - XH2O, wherein x ranges from 1 to 6 (AMP) . It is preferred that the ammonium-containing compound have a low solubility in water so as to be compatible with conventional papermaking processes , e . g . , the filler is substantially insoluble in an aqueous dispersion containing ingredients of the paper, such as flax, etc . That is , the ammonium-containing compound should be stable enough in a papermaking process to survive intact as filler in the final paper product . This includes sufficient thermal stability to survive the drying steps in the papermaking process . Magnesium ammonium phosphate and its hydrates are well-suited to conventional papermaking processes , and evolve ammonia during the smoking process in a manner that greatly decreases the content of certain low molecular weight aldehydes in smoke . Magnesium potassium phosphate is isostructural with magnesium ammonium phosphate and can form solid solutions therewith effective for reducing the aldehyde content in smoke . An ammonium magnesium phosphate filler that consists essentially of the monohydrate form of magnesium ammonium phosphate is especially preferred.

The ammonium-containing compound filler can also comprise one or more of the following mineral phases : dittmarite , struvite , hannayite , schertelite, mundrabillaite and swaknoite .

Ammonium-containing compounds considered useful as filler materials have a range of surface areas , a range of particle sizes

(mostly in the micron range) , possess appropriate opacity, have low solubility in water (required for papermaking) , and possess other properties that are considered desirable in fillers for papers used in cigarettes . In similar papers used for cigarette papers , . the filler preferably has a particle size below 25μm, more preferably below lOμm.

The filtering material can include nanoparticles . Some or all of the nanoparticles can be a filler used in' the web and some or all of the nanoparticles can be disposed on a surface of the web . The nanoparticles can be capable of acting as at least one of an oxidant for converting carbon monoxide to carbon dioxide and a catalyst for converting carbon monoxide to carbon dioxide , or both . The nanoparticles can be selected from the group consisting of metals , metal compounds , metal oxides , doped metal oxides , and mixtures thereof . Suitable nanoparticles are preferably selected from the group consisting of Fe2O3 , CuO, TiO2 , CeO2 , Ce2O3 , Al2O3 , Y2O3 doped with zirconium, Mn2O3 doped with palladium, and mixtures thereof . See , for example, commonly-owned US 6 769 437 and U . S . Published Patent Application Nos . 20030075193 and 20030131859.

The nanoparticles preferably have an average particle size less than about 500nm, preferably an average particle size less than about lOOnm, more preferably an average particle size less than about 50nm, and still more preferably an average particle size less than about 5nm. The nanoparticles preferably have a surface area of at least about 20m2/g, and more preferably a surface area of at least about 200m2/g . Though embodiments have been described in conjunction with a single web 25 , it will be appreciated that multiple webs 25 may be used, as seen in FIG. 4. Also, more than one type of filtering material may be used on a single web or on different webs . In other embodiments (not shown) the filter may be disposed in the tobacco rod portion or in the tobacco rod portion and the tipping . Where multiple webs are used, they may occupy substantially the same volume, such as where they are layered next to one another, or may be arranged at different axial locations along the length of the cigarette that may be next to one another or not , as desired or necessary . While this invention has been illustrated and described in accordance with a preferred embodiment , it is recognized that variations and changes may be made therein without departing from the invention as set forth in the claims .

Claims

CLAIMS ;
1. A cigarette of an electrical smoking system, comprising : a filter tipping including a web including added filtering material and a tubular wrapper around the web; and a tobacco rod portion adapted to generate a puff of smoke upon being heated by heating elements during smoking, the tobacco rod portion being attached to the filter tipping .
2. The cigarette as set forth in claim 1, wherein the filtering material is an ammonium containing compound filler used in the web .
3. The cigarette as set forth in claim 1 , wherein the filtering material includes nanoparticles .
4. The cigarette as set forth in claim 1, wherein the filtering material reacts with at least one component of cigarette smoke .
5. The cigarette as set forth in claim 1 , wherein the filter tipping includes a filter plug .
6. The cigarette as set forth in claim 5 , wherein the filter plug is disposed at an end of the filter tipping opposite the tobacco rod portion .
7. The cigarette as set forth in claim 1 , wherein the filter tipping includes a tubular free-flow filter having an internal opening .
8. The cigarette as set forth in claim 8 , wherein the web is disposed in the internal opening .
9. The cigarette as set forth in claim 1, wherein the web contacts an interior surface of the wrapper .
10. The cigarette as set forth in claim 1 , wherein the tobacco rod portion includes a plug portion.
11. The cigarette as set forth in claim 10 , wherein the tobacco rod portion includes a free-flow filter
12. The cigarette as set forth in claim 11 , wherein the tobacco rod 5 portion includes a void portion .
13. The cigarette as set forth in claim 1 , wherein the tobacco rod portion includes a free-flow filter
o 14. The cigarette as set forth in claim 1 , wherein the tobacco rod portion includes a void portion .
15. The cigarette as set forth in claim 1 , wherein the tobacco rod portion includes and a tobacco web . 5
16. A method for making a cigarette for an electrical smoking system, comprising : making a filter tipping by surrounding a web including added filtering material with a tubular wrapper ,- and o attaching a tobacco rod portion adapted to generate a puff of smoke upon being heated by one or more heating elements during smoking to the filter tipping .
17. The method as set forth in claim 16 , including adding the 5 filtering material by incorporating an aminopropylsilyl group covalently bonded to a non-volatile inorganic substrate into the web .
18. The method as set forth in claim 16 , including adding the filtering material by incorporating an ammonium containing compound 0 filler into the web .
19. The method as set forth in claim 16 , wherein the filtering material includes nanoparticles .
PCT/IB2005/004032 2004-12-22 2005-12-20 Filter cigarette and method of making filter cigarette of an electrical smoking system WO2006067627A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US63786204P true 2004-12-22 2004-12-22
US60/637,862 2004-12-22

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP2007547706A JP2008525009A (en) 2004-12-22 2005-12-20 Method of manufacturing a filter cigarette the filter cigarette and electrical smoking system
CA 2592146 CA2592146A1 (en) 2004-12-22 2005-12-20 Filter cigarette and method of making filter cigarette of an electrical smoking system
MX2007007559A MX2007007559A (en) 2004-12-22 2005-12-20 Filter cigarette and method of making filter cigarette of an electrical smoking system.
EA200701330A EA200701330A1 (en) 2004-12-22 2005-12-20 Filter with filter and method of getting cigarettes with electric cooling filter system
AU2005317678A AU2005317678A1 (en) 2004-12-22 2005-12-20 Filter cigarette and method of making filter cigarette of an electrical smoking system
BRPI0518562 BRPI0518562A2 (en) 2004-12-22 2005-12-20 cigarette filter and method of making cigarette filter with a system of electric smoking
EP20050826568 EP1838175A1 (en) 2004-12-22 2005-12-20 Filter cigarette and method of making filter cigarette of an electrical smoking system
IL18363207A IL183632D0 (en) 2004-12-22 2007-06-04 Filter cigarette and method of making filter cigarette of an electrical smoking system
NO20073817A NO20073817L (en) 2004-12-22 2007-07-20 A filter cigarette and process feed for the production thereof with an electrically roykesystem

Publications (2)

Publication Number Publication Date
WO2006067627A1 true WO2006067627A1 (en) 2006-06-29
WO2006067627A8 WO2006067627A8 (en) 2007-08-02

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US (1) US20060185687A1 (en)
EP (1) EP1838175A1 (en)
JP (1) JP2008525009A (en)
KR (1) KR20070089849A (en)
CN (1) CN101094599A (en)
AU (1) AU2005317678A1 (en)
BR (1) BRPI0518562A2 (en)
CA (1) CA2592146A1 (en)
EA (1) EA200701330A1 (en)
IL (1) IL183632D0 (en)
MA (1) MA29114B1 (en)
MX (1) MX2007007559A (en)
NO (1) NO20073817L (en)
WO (1) WO2006067627A1 (en)
ZA (1) ZA200704692B (en)

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EP1838175A1 (en) 2007-10-03
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CA2592146A1 (en) 2006-06-29
MX2007007559A (en) 2007-08-15
US20060185687A1 (en) 2006-08-24
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AU2005317678A1 (en) 2006-06-29
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ZA200704692B (en) 2008-04-30
WO2006067627A8 (en) 2007-08-02

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