EP2540174B1 - Tobacco Filter Containing Magnesium Aluminometasilicate - Google Patents

Tobacco Filter Containing Magnesium Aluminometasilicate Download PDF

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Publication number
EP2540174B1
EP2540174B1 EP11171926.6A EP11171926A EP2540174B1 EP 2540174 B1 EP2540174 B1 EP 2540174B1 EP 11171926 A EP11171926 A EP 11171926A EP 2540174 B1 EP2540174 B1 EP 2540174B1
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Prior art keywords
magnesium aluminometasilicate
tobacco
filter
formaldehyde
mass
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EP11171926.6A
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German (de)
French (fr)
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EP2540174A1 (en
Inventor
Hiroki Taniguchi
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Daicel Corp
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Daicel Corp
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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
    • 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
    • A24D3/166—Silicic acid or silicates

Definitions

  • the present invention relates to the use of a tobacco filter for selectively and efficiently eliminating formaldehyde.
  • adsorbent for filtering a component in a tobacco smoke As an adsorbent for filtering a component in a tobacco smoke, a variety of constituent components are proposed.
  • JP-B 3 895327 equivalent to WO-A2003/056947 , and EP 1470761 , a cigarette is disclosed that is characterized by containing a tobacco rod and a filter being connected to the tobacco rod and containing compounds of hydrotalcites of 48.3 to 146.7 mg.
  • GB-A-1 481 680 discloses filters for cigarettes containing a complex magnesium aluminum silicate as an absorbent for removing tar and nicotine from tobacco smoke.
  • An object of the present invention is to provide a tobacco filter capable of selectively and efficiently eliminating aldehydes (in particular, formaldehyde) and provide tobacco provided with the tobacco filter.
  • aldehydes in particular, formaldehyde
  • the present invention provides the use of magnesium aluminometasilicate having a specific surface area in the range of 100 m 2 /g to 300 m 2 /g and wherein the pH of a 4% by mass slurry of the magnesium aluminometasilicate is from 8.5 to 10, in a tobacco filter, which comprises the magnesium aluminometasilicate in an amount of 0.5 to 95 % by mass, for selectively absorbing formaldehyde from the mainstream smoke of tobacco.
  • Fig. 1 is an illustrative drawing of a testing method for confirming an adsorption effect of formaldehyde.
  • the numeral reference 1 represents tobacco
  • 2 represents filter
  • 3 represents cut surface
  • 4 represents sealing tape
  • 5 represents magnesium aluminometasilicate layer
  • 6 represents glass tube
  • 7 represents sealing tape.
  • a tobacco filter of the present invention is excellent in a selective adsorption property for aldehydes, in particular for formaldehyde.
  • a tobacco filter uses the above magnesium aluminometasilicate in a filter material.
  • filter material filter tow conventionally used in tobacco filters, non-woven fabrics or the like can be used.
  • the magnesium aluminometasilicate used in the present invention is a known component used as e.g. an antacid, or a filler.
  • the particle size of magnesium aluminometasilicate is not limited in particular, the particle size range of 100 ⁇ m to 1000 ⁇ m is preferred from the perspective of containing magnesium aluminometasilicate in a predetermined ratio in the tobacco filter and enhancing the adsorption effect of aldehydes.
  • the specific surface area of the magnesium aluminometasilicate is in the range of 100 m 2 /g to 300 m 2 /g from the perspective of enhancing the adsorption effect of aldehydes.
  • pH of a 4% by mass slurry of such magnesium aluminometasilicate is in an alkaline region (from 8.5 to 10).
  • the tobacco filter can also contain known various components blended in tobacco filters such as perfumes.
  • the ratio of magnesium aluminometasilicate in the tobacco filter is from 0.5% by mass to 95% by mass of magnesium aluminometasilicate, is preferably from 2% by mass to 85% by mass, and is more preferably from 5% by mass to 70% by mass.
  • the tobacco filter wherein the magnesium aluminometasilicate is used according to the present invention preferably has an either embodiment of:
  • the filter in a case where the filter includes three or more segments, it is also possible to have one segment of a layer containing magnesium aluminometasilicate and the rest of layers containing a perfume and the like.
  • the tobacco using the magnesium aluminometasilicate according to the present invention is one provided with the tobacco filter mentioned above, which is effective in reducing formaldehyde in the mainstream smoke of tobacco.
  • a tobacco filter shown in Fig. 1 (b) was produced in a manner described below to test the adsorption effect for aldehydes.
  • a filter of Peace Lights, trade name, (produced by Japan Tobacco, Inc.) was cut at a position 14 mm away from the end portion to separate it into filters 2a and 2b.
  • magnesium aluminometasilicate 5 (trade name Neusilin; Fuji Chemical Industry Co., Ltd.). The types and properties of magnesium aluminometasilicate used in each Example are shown in Table 1.
  • the magnesium aluminometasilicate was treated with sieves having openings (JIS Z8801-1 2006) of 1.0 mm and 0.1 mm, respectively, to obtain that having a particle size of passing through the openings of 1.0 mm, but not passing through the openings of 0.1 mm.
  • the filter was filled with the magnesium aluminometasilicate.
  • the filter 2a was fitted into the glass tube 6 so as to sandwich the magnesium aluminometasilicate 5 with the filter 2b.
  • Fig. 1 (a) is tobacco as a control, in which a filter was cut in the same manner as in Fig. 1(b) to make filters 2a and 2b and then they were tightly sealed with a sealing tape 4 so as to completely cover cut surfaces.
  • smoking was carried out by a constant volume automatic smoking machine of a piston type (RM20/CS manufactured by Borgwaldt KC GmbH) under the conditions of a flow rate of 17.5 ml/second, a smoking time period of 2 seconds/time, and a smoking frequency of 1 time/minute.
  • Formaldehyde in the mainstream smoke was collected in a DNPH (dinitrophenylhydrazine) solution and was derivatized with the DNPH, and then was measured by using a gas chromatograph (G-3000 manufactured by Hitachi, Ltd.) using the UV (ultraviolet) absorbance.
  • DNPH dinitrophenylhydrazine
  • a formaldehyde retention rate was calculated by the following equation.
  • Formaldehyde Retention Rate % 100 xCf / Tf

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

    Technical Field
  • The present invention relates to the use of a tobacco filter for selectively and efficiently eliminating formaldehyde.
    • Background Arts
  • As an adsorbent for filtering a component in a tobacco smoke, a variety of constituent components are proposed. In JP-B 3 895327 , equivalent to WO-A2003/056947 , and EP 1470761 , a cigarette is disclosed that is characterized by containing a tobacco rod and a filter being connected to the tobacco rod and containing compounds of hydrotalcites of 48.3 to 146.7 mg.
    GB-A-1 481 680 discloses filters for cigarettes containing a complex magnesium aluminum silicate as an absorbent for removing tar and nicotine from tobacco smoke.
    • Summary of the Invention
  • An object of the present invention is to provide a tobacco filter capable of selectively and efficiently eliminating aldehydes (in particular, formaldehyde) and provide tobacco provided with the tobacco filter.
  • The present invention provides the use of magnesium aluminometasilicate having a specific surface area in the range of 100 m2/g to 300 m2/g and wherein the pH of a 4% by mass slurry of the magnesium aluminometasilicate is from 8.5 to 10, in a tobacco filter, which comprises the magnesium aluminometasilicate in an amount of 0.5 to 95 % by mass, for selectively absorbing formaldehyde from the mainstream smoke of tobacco.
    • Brief Description of the Drawings
  • Fig. 1 is an illustrative drawing of a testing method for confirming an adsorption effect of formaldehyde.
  • In Fig. 1, the numeral reference 1 represents tobacco, 2 represents filter, 3 represents cut surface, 4 represents sealing tape, 5 represents magnesium aluminometasilicate layer, 6 represents glass tube, and 7 represents sealing tape.
    • Detailed Description of the Invention
  • A tobacco filter of the present invention is excellent in a selective adsorption property for aldehydes, in particular for formaldehyde.
  • According to the invention, a tobacco filter uses the above magnesium aluminometasilicate in a filter material. As the filter material, filter tow conventionally used in tobacco filters, non-woven fabrics or the like can be used.
  • The magnesium aluminometasilicate used in the present invention is a known component used as e.g. an antacid, or a filler.
  • Although the particle size of magnesium aluminometasilicate is not limited in particular, the particle size range of 100 µm to 1000 µm is preferred from the perspective of containing magnesium aluminometasilicate in a predetermined ratio in the tobacco filter and enhancing the adsorption effect of aldehydes.
  • The specific surface area of the magnesium aluminometasilicate is in the range of 100 m2/g to 300 m2/g from the perspective of enhancing the adsorption effect of aldehydes.
  • Further, the pH of a 4% by mass slurry of such magnesium aluminometasilicate is in an alkaline region (from 8.5 to 10).
  • In addition, the tobacco filter can also contain known various components blended in tobacco filters such as perfumes.
  • The ratio of magnesium aluminometasilicate in the tobacco filter is from 0.5% by mass to 95% by mass of magnesium aluminometasilicate, is preferably from 2% by mass to 85% by mass, and is more preferably from 5% by mass to 70% by mass.
  • The tobacco filter, wherein the magnesium aluminometasilicate is used according to the present invention preferably has an either embodiment of:
    1. 1. (I) the one having a filter divided into two or three or more segments and having a layer containing magnesium aluminometasilicate in one spot or two or more spots between the adjacent segments; or
    2. 2. (II) the one containing magnesium aluminometasilicate in a dispersed state in the filter.
  • In the embodiment of (I), in a case where the filter includes three or more segments, it is also possible to have one segment of a layer containing magnesium aluminometasilicate and the rest of layers containing a perfume and the like.
  • The tobacco using the magnesium aluminometasilicate according to the present invention is one provided with the tobacco filter mentioned above, which is effective in reducing formaldehyde in the mainstream smoke of tobacco.
    • Examples Examples and Comparative Example
  • A tobacco filter shown in Fig. 1 (b) was produced in a manner described below to test the adsorption effect for aldehydes.
  • A filter of Peace Lights, trade name, (produced by Japan Tobacco, Inc.) was cut at a position 14 mm away from the end portion to separate it into filters 2a and 2b.
  • After removing the filter 2a, a glass tube 6 was fitted onto the remaining filter 2b to fill a predetermined amount of magnesium aluminometasilicate 5 (trade name Neusilin; Fuji Chemical Industry Co., Ltd.). The types and properties of magnesium aluminometasilicate used in each Example are shown in Table 1.
  • The magnesium aluminometasilicate was treated with sieves having openings (JIS Z8801-1 2006) of 1.0 mm and 0.1 mm, respectively, to obtain that having a particle size of passing through the openings of 1.0 mm, but not passing through the openings of 0.1 mm. The filter was filled with the magnesium aluminometasilicate.
  • After that, the filter 2a was fitted into the glass tube 6 so as to sandwich the magnesium aluminometasilicate 5 with the filter 2b.
  • After that, resultant item was tightly sealed with a sealing tape 7 so as to completely cover contact surfaces of the glass tube 6 and the filters 2a and 2b to fabricate tobacco for testing. Fig. 1 (a) is tobacco as a control, in which a filter was cut in the same manner as in Fig. 1(b) to make filters 2a and 2b and then they were tightly sealed with a sealing tape 4 so as to completely cover cut surfaces.
  • Through the use of the tobacco for testing shown in Figs. 1(a), (b), measurement was carried out in a method described below by using a measuring device shown in Fig. 2 of JP-B 3895327 . Results are shown in Table 1.
    • (Retention Rate of Formaldehyde)
  • Through the use of the tobacco for testing (Fig. 1b) and the tobacco as the control (Fig. 1a), smoking was carried out by a constant volume automatic smoking machine of a piston type (RM20/CS manufactured by Borgwaldt KC GmbH) under the conditions of a flow rate of 17.5 ml/second, a smoking time period of 2 seconds/time, and a smoking frequency of 1 time/minute. Formaldehyde in the mainstream smoke was collected in a DNPH (dinitrophenylhydrazine) solution and was derivatized with the DNPH, and then was measured by using a gas chromatograph (G-3000 manufactured by Hitachi, Ltd.) using the UV (ultraviolet) absorbance.
  • By defining an amount of formaldehyde collected by using the tobacco as the control as Tf and an amount of formaldehyde collected by using the tobacco for testing of Comparative Example and Examples as Cf, a formaldehyde retention rate was calculated by the following equation. Formaldehyde Retention Rate % = 100 xCf / Tf
    Figure imgb0001
  • A smaller retention rate of formaldehyde shows a more excellent adsorption performance for formaldehyde. Other aldehydes were also evaluated in a method similar to the above. Table 1
    Type of Magnesium Aluminometasilicate Content of Magnesium Aluminometasilicate (% by mass) Residual Ratio of Aldehydes (%)
    Type Specific Surface Area (m2/g) pH of 4% by mass slurry Formaldehyde Acetaldehyde Propionaldehyde Crotonaldehyde
    Comparative Example 1 (Control) (Not Used) 0 100 100 100 100
    Example 1 Neusilin SG2 110 9.2 33.8 26 90 61 37
    Example 2 Neusilin SG2 110 9.2 16.9 34 97 82 71
    Comparative Example 2 Neusilin US2 300 7.3 16.6 30 89 81 46

Claims (3)

  1. Use of magnesium aluminometasilicate having a specific surface area in the range of 100 m2/g to 300 m2/g and wherein the pH of a 4% by mass slurry of the magnesium aluminometasilicate is from 8.5 to 10, in a tobacco filter, which comprises the magnesium aluminometasilicate in an amount of 0.5 to 95 % by mass, for selectively adsorbing formaldehyde from the mainstream smoke of tobacco.
  2. The use according to claim 1, wherein the filter has a layer comprising magnesium aluminometasilicate therein.
  3. The use according to claim 1, wherein the filter comprises magnesium aluminometasilicate in a dispersed state therein.
EP11171926.6A 2011-06-29 2011-06-29 Tobacco Filter Containing Magnesium Aluminometasilicate Active EP2540174B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11171926.6A EP2540174B1 (en) 2011-06-29 2011-06-29 Tobacco Filter Containing Magnesium Aluminometasilicate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11171926.6A EP2540174B1 (en) 2011-06-29 2011-06-29 Tobacco Filter Containing Magnesium Aluminometasilicate

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EP2540174A1 EP2540174A1 (en) 2013-01-02
EP2540174B1 true EP2540174B1 (en) 2017-06-21

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718612A (en) * 1970-06-16 1973-02-27 Strickman Foundation Inc R A process for producing a cigarette filter material
GB1481680A (en) * 1974-07-11 1977-08-03 Shepard M Cigarette filters
EP1470761A1 (en) * 2002-01-08 2004-10-27 Japan Tobacco Inc. Smoking filter and smoking article

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU417739B2 (en) * 1966-12-16 1971-10-12 W. D & ho WILLS (AUSTRALIA) LIMITED Filter and filtering media for tobacco smoke
FR2306645A1 (en) * 1975-04-11 1976-11-05 Bour Andre Filter element for cigarettes, cigars and pipes - with mineral filter medium kept in position by cellulose-type filters
JPS5421679A (en) * 1977-07-19 1979-02-19 Daicel Chem Ind Ltd Filter medium for smoke
DE3312877A1 (en) * 1983-04-11 1984-10-11 Degussa Ag, 6000 Frankfurt MAGNESIUM SILICATE-TIED ZEOLITE GRANULES, TYPE ZEOLITH A, METHOD FOR THE PRODUCTION AND USE THEREOF
DE69524059T2 (en) * 1995-05-03 2002-07-18 British American Tobacco (Investments) Ltd., London A smoking article

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718612A (en) * 1970-06-16 1973-02-27 Strickman Foundation Inc R A process for producing a cigarette filter material
GB1481680A (en) * 1974-07-11 1977-08-03 Shepard M Cigarette filters
EP1470761A1 (en) * 2002-01-08 2004-10-27 Japan Tobacco Inc. Smoking filter and smoking article

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"The Speciality Excipient Neusilin", 1 July 2009 (2009-07-01), pages 1 - 24, XP055250935, Retrieved from the Internet <URL:http://www.harke.com/fileadmin/images/pharma/Broschueren/Fuji_Neusilin.pdf> [retrieved on 20160217] *
FUJI CHEMICAL INDUSTRY CO. ET AL: "The Specialty Excipient Neusilin", 1 January 2010 (2010-01-01), XP055165535, Retrieved from the Internet <URL:http://www.fujichemical.co.jp/english/medical/medicine/neusilin/index.html> [retrieved on 20150128] *
GENSOL PHARMA PVT. LTD.: "Magnesium Aluminum Silicate", 1 April 2016 (2016-04-01), pages 1 - 9, XP055317206, Retrieved from the Internet <URL:http://www.excipientsguide.com/excipient_details.aspx?Id=67> [retrieved on 20161108] *
JUAN LOPEZ-GONZALEZ ET AL: "Surface Area Changes of a Vermiculite by Acid and Thermal Treatment", CLAYS AND CLAY MINERALS, 1 January 1957 (1957-01-01), pages 399 - 405, XP055317211, Retrieved from the Internet <URL:http://www.clays.org/journal/archive/volume 6/6-1-399.pdf> [retrieved on 20161107], DOI: 10.1346/CCMN.1957.0060130 *

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