US20100242977A1 - Cigarette filter and filter-tipped cigarette - Google Patents

Cigarette filter and filter-tipped cigarette Download PDF

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Publication number
US20100242977A1
US20100242977A1 US12/813,947 US81394710A US2010242977A1 US 20100242977 A1 US20100242977 A1 US 20100242977A1 US 81394710 A US81394710 A US 81394710A US 2010242977 A1 US2010242977 A1 US 2010242977A1
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Prior art keywords
filter
cigarette
paper
rigidity
plug
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Abandoned
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US12/813,947
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English (en)
Inventor
Masafumi Tarora
Atsusi TORII
Toru Tsujimoto
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Japan Tobacco Inc
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Japan Tobacco Inc
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Application filed by Japan Tobacco Inc filed Critical Japan Tobacco Inc
Assigned to JAPAN TOBACCO INC. reassignment JAPAN TOBACCO INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TARORA, MASAFUMI, TORII, ATSUSI, TSUJIMOTO, TORU
Publication of US20100242977A1 publication Critical patent/US20100242977A1/en
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/04—Cigars; Cigarettes with mouthpieces or filter-tips
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163—Carbon
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/16—Pure paper, i.e. paper lacking or having low content of contaminants

Definitions

  • the present invention relates to a cigarette filter and a filter-tipped cigarette.
  • Filter-tipped cigarettes are developed and marketed to, for example, milden the smoking taste.
  • the filter-tipped cigarette comprise a cigarette main body formed of a tobacco filler rod, such as one comprising cut tobacco having the circumference thereof wrapped with a cigarette paper, and a filter fitted to one end of the cigarette main body.
  • the filter has at least one filter plug.
  • a filter material is disposed in a cylindrical body formed of a wrapper (filter plug wrapper) shaped into a cylindrical configuration (generally the configuration of a circular cylinder). The filter is fitted to one end of the cigarette main body by means of a tipping paper.
  • the filter hardness of the filter-tipped cigarette is a parameter for the choice of cigarette by smokers.
  • Most of now commercially available filter-tipped cigarettes use a cellulose acetate fiber bundle (tow) as a filter material (hereinafter also referred to as cellulose acetate filter).
  • a plasticizer for example, triacetin
  • the amount of triacetin added to the cellulose acetate filter of now commercially available filter-tipped cigarettes is in the range of 5 to 10% by weight based on the amount of cellulose acetate.
  • the ventilation ratio thereof is desired for the ventilation ratio thereof to be high in order to permit the inflow of ambient air for higher dilution of mainstream smoke.
  • a cigarette filter of high ventilation ratio known as a recessed cigarette filter, is disclosed in the pamphlet of International Publication WO 00/00047.
  • This cigarette filter comprises, for example, two filter plugs both wrapped with a porous or nonporous filter plug wrapper, the two filter plugs joined to each other by means of a nonporous shaping paper.
  • This filter is fitted to a tobacco rod by means of a tipping paper.
  • the filter plug wrapper and the shaping paper are provided with mechanically perforated relatively large ventilation holes, and the tipping paper is provided with a relatively small ventilation hole perforated by laser.
  • the ventilation holes would cause such problems that the cigarette manufacturing cost is increased, the versatility to a variety of cigarette products, including a low-tar cigarette or the like, is lowered, and the stability of product quality is poor. These problems are also pointed out for Jpn. PCT National Publication No. 2004-516814 disclosing a similar recessed filter.
  • a cigarette filter comprising: a filter plug comprising a cylindrical body of a filter plug wrapper which is cylindrically shaped and a filter material disposed in the cylindrical body, wherein the filter plug wrapper is formed of a high-rigidity and high-permeability paper longitudinal rigidity of which is 30 or higher as measured in accordance with JIS P8143 and air permeability of which is 1000 CORESTA units or greater.
  • a cigarette filter comprising: a plurality of filter plugs comprising a most upstream filter plug and a most downstream filter plug, each comprising a cylindrical body of a filter plug wrapper which is cylindrically shaped and a filter material disposed in the cylindrical body, and a shaping paper configured to wrap the circumference of the plurality of filter plugs and join the plurality of filter plugs to each other, wherein the filter plug wrapper of at least one of the plurality of filter plugs is formed of a high-rigidity and high-permeability paper longitudinal rigidity of which is 30 or higher as measured in accordance with JIS P8143 and air permeability of which is 1000 CORESTA units or greater.
  • a cigarette filter comprising a plurality of filter plugs comprising a most upstream filter plug and a most downstream filter plug, each comprising a cylindrical body of filter plug wrapper which is cylindrically shaped, a filter material disposed in the cylindrical body, and a shaping paper configured to wrap the circumference of the plurality of filter plugs and join the plurality of filter plugs to each other, wherein the shaping paper is formed of a high-rigidity and high-permeability paper longitudinal rigidity of which is 30 or higher as measured in accordance with JIS P8143 and air permeability of which is 1000 CORESTA units or greater.
  • a filter-tipped cigarette comprising a cigarette main body comprising a tobacco rod wrapped with a cigarette paper and a cigarette filter fitted to one end of the cigarette main body, wherein the cigarette filter is formed of the cigarette filter of the present invention.
  • FIG. 1 is a partially developed schematic perspective view of a filter-tipped cigarette provided with a single-segment filter according to an embodiment of the present invention.
  • FIG. 2 is a partially developed schematic perspective view of a filter-tipped cigarette provided with a multisegment filter according to an embodiment of the present invention.
  • FIG. 3 is a partially developed schematic perspective view of a filter-tipped cigarette provided with a recessed single-segment filter according to an embodiment of the present invention.
  • FIG. 4 is a graph showing the hardness of each of cellulose acetate filter plugs according to embodiments of the present invention together with that of the conventional cellulose acetate filter plug.
  • FIG. 5 is a graph showing changes of the hardness of a cellulose acetate filter plug according to an embodiment of the present invention together with that of the conventional cellulose acetate filter plug brought about by changing the amount of triacetin added.
  • FIG. 6 is a graph showing the hardness of each of paper filter plugs according to embodiments of the present invention together with that of the conventional paper filter plug.
  • FIG. 7 is a graph showing changes with time of the menthol existence ratios in the cut tobacco and filter material with respect to a cellulose acetate filter.
  • FIG. 8 is a graph showing changes with time of the menthol existence ratios in the cut tobacco and filter material with respect to a paper filter.
  • FIG. 9 is a graph showing changes with time of menthol delivery into cigarette mainstream smoke with respect to each of a cigarette with a cellulose acetate filter and a cigarette with a paper filter.
  • the cigarette filter of the present invention encompasses a so-called single-segment filter formed of a single filter plug and a so-called multisegment filter comprising a plurality of filter plugs including a most upstream filter plug and a most downstream filter plug.
  • each of the filter plugs includes a cylindrical body, generally in the form of a circular cylinder, of filter plug wrapper which is cylindrically shaped and a filter material disposed in the cylindrical body.
  • the filter plug includes a filter material rolled up (wrapped) with a filter plug wrapper.
  • the plurality of filter plugs are wrapped with a shaping paper so as to be joined to each other.
  • the expressions “upstream” and “downstream” are based on the direction of flow of tobacco mainstream smoke passing through the interior of a cigarette.
  • the filter plug wrapper of the single-segment filter is formed of a specified high-rigidity and high-permeability paper.
  • the filter plug wrapper of at least one filter plug and/or the shaping paper is formed of a specified high-rigidity and high-permeability paper.
  • the high-rigidity and high-permeability paper for use in the present invention has a longitudinal rigidity (stiffness in the longitudinal direction) of paper of 30 or higher as measured in accordance with JIS P8143 (method of testing the stiffness of paper by self-weight bending) and an air permeability of 1000 CORESTA units or greater.
  • the high-rigidity and high-permeability paper has a longitudinal rigidity of 30 to 400 and an air permeability of 1000 to 30,000 CORESTA units.
  • Table 1 also includes a now generally employed porous filter plug wrapper of high air permeability (conventional filter plug wrapper, represented by symbol P).
  • cellulose acetate fiber tow is used as a filter material.
  • a plasticizer such as triacetin
  • the same filter hardness as heretofore can be achieved even by the addition of plasticizer in an amount corresponding to less than 5% (including 0%) based on the weight of cellulose acetate fiber.
  • the plasticizer is added to the cellulose acetate fiber in the same amount corresponding to 5 to 10% based on the weight thereof as heretofore, the hardness over the conventional filter can be achieved.
  • the addition of triacetin in an amount of over 12% by weight will dissolve the cellulose acetate fiber and will invite the problem of the occurrence of acetic acid odor attributed to the decomposition of triacetin. Accordingly, the upper-limit value of the conventional filter hardness achieved without the occurrence of these problems is the hardness corresponding to the addition of 12% by weight triacetin.
  • the addition of 12% by weight triacetin can achieve hardness over the conventional upper-limit value. That is, the present invention can be applied to the cellulose acetate filter having triacetin added in an amount of over 10% by weight but not exceeding 12% by weight.
  • the filter material of the cigarette filter of the present invention is not limited to a cellulose acetate fiber.
  • binders added to bind the filter material together (for example, polyvinyl alcohol, polyvinyl acetate, polyethylene glycol, dimethyl phthalate, diethyl phthalate and the like).
  • the filter material free of any hardness increasing agent it has been difficult for the filter material free of any hardness increasing agent to achieve the filter hardness equivalent to that of the cellulose acetate filter having triacetin mixed therein.
  • the filter hardness equivalent to or higher than that of the cellulose acetate filter having triacetin mixed therein can be achieved by the employment of the high-rigidity and high-permeability paper according to the present invention.
  • the filter including the filter material free of any hardness increasing agent exerts an additional advantage when it is used in a filter-tipped cigarette having any of flavors (for example, menthol, limonene, peppermint oil or spearmint oil; an ester such as ethyl acetate, ethyl butyrate or ethyl benzoate; an alcohol such as linalool, nerol or geraniol; a phenol such as anethole; an aldehydes such as cinnamaldehyde or vanillin; a lactone and a pyrazine), together with triacetin, sorbed in the cellulose acetate fiber.
  • flavors for example, menthol, limonene, peppermint oil or spearmint oil; an ester such as ethyl acetate, ethyl butyrate or ethyl benzoate; an alcohol such as linalool, nerol or geranio
  • menthol in the current menthol cigarette, menthol is mixed in cut tobacco, and a cellulose acetate filter containing triacetin is fitted thereto.
  • the menthol contained in the cigarette together with triacetin is sorbed in the cellulose acetate fiber with time.
  • the menthol sorbed in the cellulose acetate fiber does not migrate into the mainstream smoke during smoking. Accordingly, it is known that even when menthol is present in the cigarette, the menthol delivery into the mainstream smoke is decreased with time in accordance with the sorption of menthol in the filter.
  • the filter material such as a paper filter, free of any plasticizer, hardener or binder
  • the sorption of menthol in the filter with time does not occur as different from the cellulose acetate filter containing a plasticizer, and menthol remains in the cut tobacco. Therefore, even when the amount of menthol in the cigarette is the same, the amount of menthol delivered from the cut tobacco during smoking is greater to thereby ensure a menthol delivery higher than in the use of the cellulose acetate filter containing triacetin.
  • the menthol delivery into the mainstream smoke during smoking is stable with time.
  • a filter plug formed of a filter material not containing any hardness increasing agent can be combined with a filter plug formed of a cellulose acetate fiber.
  • the filter of the present invention can include a filter plug having activated charcoal particles (charcoal) added thereto.
  • activated charcoal particles can be mixed in a single filter plug.
  • activated charcoal particles are added to a filter plug upstream of the most downstream filter plug.
  • the filter of the present invention can have the structure of a recessed filter as described in the pamphlet of International Publication WO 00/00047 and Jpn. PCT National Publication No. 2004-516814.
  • the cylindrical body of the single filter plug is extended out of the downstream end face of the filter material so as to provide a recess portion.
  • the shaping paper is extended out of the downstream end face of the most downstream filter plug so as to provide a recess portion.
  • FIG. 1 is a partially developed schematic perspective view of a filter-tipped cigarette 100 provided with a single-segment filter.
  • the filter-tipped cigarette 100 includes a cigarette main body 110 and a filter plug 120 provided at one end of the cigarette main body 110 .
  • the cigarette main body 110 is identical to conventional cigarettes and includes a tobacco rod and a cigarette paper with which the circumference of the tobacco rod is wrapped, both not shown.
  • the tobacco rod is formed of a tobacco filler, such as cut tobacco.
  • the filter plug 120 includes a cylindrical body 122 of filter plug wrapper which is cylindrically shaped 121 and a filter material 123 disposed in the cylindrical body 122 .
  • the cigarette main body 110 and the filter plug 120 are joined to each other by means of a tipping paper 130 so that the end faces thereof unite with each other in the same fashion as in conventional filter-tipped cigarettes.
  • the tipping paper 130 can be provided with ventilation holes 131 .
  • the high-rigidity and high-permeability paper according to the present invention is used as the filter plug wrapper 121 .
  • FIG. 2 is a partially developed schematic perspective view of a filter-tipped cigarette 200 provided with a two-segment filter as an example of the multisegment filter.
  • a two-segment filter 210 is fitted to one end of a cigarette main body 110 .
  • the two-segment filter 210 includes two filter plugs 220 and 230 .
  • the upstream filter plug 220 includes a cylindrical body 222 of filter plug wrapper which is cylindrically shaped 221 and a filter material 223 disposed in the cylindrical body 222 .
  • the downstream filter plug 230 includes a cylindrical body 232 of filter plug wrapper which is cylindrically shaped 231 and a filter material 233 disposed in the cylindrical body 232 .
  • the two filter plugs 220 and 230 are joined to each other by means of a shaping paper 240 so that the end faces thereof unite with each other.
  • the cigarette main body 110 and the two-segment filter 210 are joined to each other by means of a tipping paper 130 so that the end faces thereof unite with each other in the same fashion as in conventional filter-tipped cigarettes.
  • either or both of the filter plug wrappers 221 and 231 can be formed of the high-rigidity and high-permeability paper according to the present invention.
  • the filter hardness is often felt by the lips. Therefore, when the filter plug wrapper 231 of the downstream filter plug 230 is formed of the high-rigidity and high-permeability paper according to the present invention, even if the filter plug wrappers of other filter plugs are not formed of the high-rigidity and high-permeability paper, the smokers can feel the retention or increase of the filter hardness. Further, the smokers hold the cigarette with their fingers during smoking, so that the filter hardness may be felt by the fingers. In that case, it is desirable to use the high-rigidity and high-permeability paper according to the present invention in the filter plug wrapper 221 of the upstream filter plug 220 near the cut tobacco.
  • the filter hardness can be simultaneously felt by the lips and fingers.
  • the intention can be achieved by using the high-rigidity and high-permeability paper according to the present invention in the filter shaping paper 240 of the multisegment filter.
  • both the filter plug wrappers 221 and 231 may be formed of any of conventional filter plug wrappers (rigidity (stiffness): 10 to 15, air permeability: 70 to 30,000 CORESTA units, thickness: 30 to 80 ⁇ m, and basis weight: 15 to 27 g/m 2 ).
  • rigidity (stiffness) 10 to 15, air permeability: 70 to 30,000 CORESTA units, thickness: 30 to 80 ⁇ m, and basis weight: 15 to 27 g/m 2 ).
  • the intention can be achieved by not only using the high-rigidity and high-permeability paper in the filter plug wrapper 221 and/or 231 but also using the high-rigidity and high-permeability paper according to the present invention in the shaping paper 240 as well, namely, implementing the double application of the high-rigidity and high-permeability paper.
  • FIG. 3 is a partially developed schematic perspective view of a filter-tipped cigarette 300 provided with a recessed single-segment filter.
  • the cigarette 300 provided with a recessed filter includes a cigarette main body 110 and a filter plug 320 provided at one end of the cigarette main body 110 .
  • the filter plug 320 includes a cylindrical body 322 of filter plug wrapper which is cylindrically shaped 321 and a filter material 323 disposed in the cylindrical body 322 .
  • the cylindrical body 122 is extended out of the downstream end face of the filter material 323 so as to provide a recess portion 324 .
  • the cigarette main body 110 and the filter plug 320 are joined to each other by means of a tipping paper 130 so that the end faces thereof unite with each other in the same fashion as in conventional filter-tipped cigarettes.
  • the tipping paper 130 can be provided with ventilation holes 131 .
  • the high-rigidity and high-permeability paper according to the present invention is used as the filter plug wrapper 321 .
  • Filter plugs were produced in accordance with the routine procedure using the papers indicated in Table 1 above as filter plug wrappers.
  • the employed filter material consisted of a conventional cellulose acetate fiber tow having triacetin added thereto in an amount corresponding to 6% by weight based on the weight of the cellulose acetate fiber tow.
  • Each of the filter plugs had a circumference of 24.5 mm and a length of 25 mm.
  • Each of the filter plug wrappers covered the circumference of the filter material in just proportion. The hardness of each of the obtained filters was measured.
  • the hardness of each of the filters should be measured in the condition of the filter fitted to the cigarette.
  • the hardness of each of the filters was measured in the form of a filter plug before being fitted to the cigarette (hereinafter, the filter hardness was measured by the same measuring method).
  • the filter hardness was measured using NFQA (filter quality measuring instrument) manufactured by JT TOSHI. The results are shown in FIG. 4 .
  • the filter hardness was calculated from a strain occurring on the filter upon the application of a given load. Accordingly, the less the strain, the greater the filter hardness is. Thus, in FIG. 4 , the less the value of filter hardness, the harder the filter is.
  • each of the filter plugs provided with the high-rigidity and high-permeability papers S1 to S4 according to the present invention is increased over that of the filter plug provided with the now usually employed filter plug wrapper P.
  • All the filter plugs provided with the high-rigidity and high-permeability papers S1 to S4 according to the present invention exhibited an air permeability of 1000 CORESTA units or higher. Further, the high-rigidity paper S4 exhibiting an air permeability equivalent to that of the now usually employed filter plug wrapper P could be available.
  • the high-rigidity and high-permeability paper according to the present invention makes it feasible to not only achieve the retention or increase of the filter hardness but also avoid the problems of the prior art of making ventilation holes, namely, an increase of cigarette manufacturing cost, a low versatility to a variety of cigarette products including a low-tar cigarette or the like and a poor stability of product quality.
  • Filter plugs with the same size as in Example 1 were produced using the conventional filter plug wrapper P and high-rigidity and high-permeability paper S4 indicated in Table 1.
  • the filter material was the same conventional cellulose acetate fiber tow as in Example 1, but the amount of triacetin added to the tow was changed (amounts equivalent to 0 to 12% by weight based on the weight of cellulose acetate fiber).
  • the hardness of each of the obtained filter plugs was measured in the same manner as in Example 1. The results are shown in FIG. 5 .
  • the line a indicates the results of the use of the filter plug wrapper P
  • the line b indicates the results of the use of the high-rigidity and high-permeability paper S4.
  • triacetin is added to the filter in an amount of 5 to 10% by weight based on the weight of the filter material.
  • the filter hardness can be increased without the need to increase the amount of triacetin.
  • the filter hardness exhibited when the conventional filter plug wrapper P is used and the amount of triacetin is about 6% by weight can be achieved by the use of triacetin in an amount of about 3% by weight when the high-rigidity and high-permeability paper S4 is used. Therefore, even when the amount of triacetin is less, the hardness equivalent to that of the current filter can be achieved by the use of the high-rigidity and high-permeability paper S4.
  • So-called paper filter plugs were produced using the papers indicated in Table 1.
  • the filter material used was a creped pulp paper.
  • the configuration of each of the obtained filter plugs was the same as in Example 1. All the filter plugs exhibited an air-flow resistance of 350 mm H 2 O/120 mm.
  • the hardness of each of the obtained filter plugs was measured in the same manner as in Example 1. The results are shown in FIG. 6 .
  • the paper filter plugs wrapped with the high-rigidity and high-permeability papers according to the present invention exhibit the same satisfactorily increased hardness values as those of the cellulose acetate filter plugs of Example 1 wrapped with the high-rigidity and high-permeability papers according to the present invention. Further, an increase of filter hardness up to the level equivalent to the filter hardness exhibited by the cellulose acetate filter having triacetin added in an amount of 6% by weight can be achieved by the application of the present invention.
  • Filter-tipped cigarettes were produced by fitting each of the cellulose acetate filter plug produced using the conventional filter plug wrapper P in Example 1 and the paper filter plug produced using the high-rigidity and high-permeability paper S4 in Example 3 to a cigarette main body by means of a tipping paper. Menthol was added in an amount of 3.0 mg per cigarette to the cut tobacco of the cigarette main body.
  • the obtained filter-tipped cigarettes were stored in an atmosphere conditioned at 22° C. and a relative humidity of 60% from immediately after the completion of the production up to 12 weeks. The existence ratio of menthol in the cut tobacco and filter material during the storage period was measured by the method to be described below. The results are shown in FIG. 7 and FIG. 8 .
  • FIG. 7 and FIG. 8 The results are shown in FIG.
  • FIG. 7 shows the results with respect to the cellulose acetate filter plug.
  • FIG. 8 shows the results with respect to the paper filter plug.
  • each of the shaded portions indicates the ratio of menthol in the filter material, and each of the blank portions indicates the ratio of menthol in the cut tobacco.
  • the menthol delivery into mainstream smoke was measured by the method to be described below.
  • the results are shown in FIG. 9 .
  • the line a indicates the results with respect to the cigarette with paper filter
  • the line b indicates the results with respect to the cigarette with cellulose acetate filter.
  • Each of the cigarettes was divided into a cut tobacco portion (including the cigarette paper) and a filter portion.
  • the cut tobacco portion was put in methanol, shaken at room temperature for 40 minutes and allowed to stand still for 24 hours. The mixture was shaken once more for 40 minutes, and the supernatant was separated as a menthol extract.
  • the filter portion was put in methanol, shaken at room temperature for 40 minutes and allowed to stand still for 24 hours.
  • the supernatant was separated as a menthol extract.
  • menthol extracts were analyzed by a gas chromatograph equipped with a hydrogen flame ionization detector (FID) as a detector.
  • FID hydrogen flame ionization detector
  • the quantity of menthol was determined by an internal standard method.
  • 1,3-butanediol was used as the internal standard.
  • the tar contained in tobacco mainstream smoke was measured in accordance with ISO 3308 and 4387.
  • menthol contained in tobacco mainstream smoke in accordance with ISO 4387, the mainstream smoke was trapped in a Cambridge filter, and the Cambridge filter was put in methanol and shaken at room temperature for 40 minutes. The supernatant was separated as a menthol extract. The thus obtained menthol extract was analyzed by a gas chromatograph equipped with FID as a detector. The quantity of menthol was determined by an internal standard method. As the internal standard, 1,3-butanediol was used.
  • the menthol/tar ratio was calculated from the values of the amounts of tar and menthol in mainstream smoke determined by the above methods.
  • the application of the present invention makes it feasible to achieve a menthol cigarette that while retaining its filter hardness, exhibits a high M/T ratio, namely, a high menthol delivery even when a paper containing no hardness increasing agent is used as the filter material.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Paper (AREA)
US12/813,947 2007-12-14 2010-06-11 Cigarette filter and filter-tipped cigarette Abandoned US20100242977A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007323802 2007-12-14
JP2007-323802 2007-12-14
PCT/JP2008/072074 WO2009078287A1 (ja) 2007-12-14 2008-12-04 シガレットフィルタおよびフィルタ付きシガレット

Related Parent Applications (1)

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PCT/JP2008/072074 Continuation WO2009078287A1 (ja) 2007-12-14 2008-12-04 シガレットフィルタおよびフィルタ付きシガレット

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US (1) US20100242977A1 (de)
EP (1) EP2229827B1 (de)
JP (1) JP5043127B2 (de)
KR (1) KR101225823B1 (de)
CN (1) CN101896082B (de)
CA (1) CA2708837C (de)
ES (1) ES2608059T3 (de)
HK (1) HK1145611A1 (de)
MY (1) MY150067A (de)
RU (1) RU2423571C1 (de)
TW (1) TWI404509B (de)
UA (1) UA95201C2 (de)
WO (1) WO2009078287A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130112216A1 (en) * 2010-06-10 2013-05-09 Paul Francis Clarke Tobacco smoke filter
US20130137561A1 (en) * 2010-05-12 2013-05-30 British American Tobacco (Investments) Limited Filter Additive
US20150208722A1 (en) * 2012-08-06 2015-07-30 Philip Morris Products S.A. Smoking article with mouth end cavity
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US20180027870A1 (en) * 2015-03-27 2018-02-01 Philip Morris Products S.A. Smoking article with a mouth end cavity and ventilation
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CN101896082B (zh) 2013-10-02
CN101896082A (zh) 2010-11-24
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CA2708837C (en) 2013-02-05
UA95201C2 (ru) 2011-07-11
JPWO2009078287A1 (ja) 2011-04-28
MY150067A (en) 2013-11-29
CA2708837A1 (en) 2009-06-25
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JP5043127B2 (ja) 2012-10-10
TWI404509B (zh) 2013-08-11

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