WO2001048317A1 - Cigarette - Google Patents

Cigarette Download PDF

Info

Publication number
WO2001048317A1
WO2001048317A1 PCT/JP2000/009195 JP0009195W WO0148317A1 WO 2001048317 A1 WO2001048317 A1 WO 2001048317A1 JP 0009195 W JP0009195 W JP 0009195W WO 0148317 A1 WO0148317 A1 WO 0148317A1
Authority
WO
WIPO (PCT)
Prior art keywords
wrapping paper
paper
thermal conductivity
cigarette
tobacco
Prior art date
Application number
PCT/JP2000/009195
Other languages
English (en)
Japanese (ja)
Inventor
Keigo Miura
Original Assignee
Japan Tobacco Inc.
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
Application filed by Japan Tobacco Inc. filed Critical Japan Tobacco Inc.
Priority to AU24019/01A priority Critical patent/AU2401901A/en
Publication of WO2001048317A1 publication Critical patent/WO2001048317A1/fr

Links

Classifications

    • 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

Definitions

  • the present invention relates to a cigarette in which the wrapping paper has a high air permeability and a low natural burning rate.
  • V f ventilation ratio
  • An object of the present invention is to provide a cigarette in which the wrapping paper has a high air permeability and a low natural combustion speed. Disclosure of the invention
  • the cigarette of the present invention is a cigarette obtained by winding a cigarette wrap by wrapping paper, wherein the wrapping paper has an air permeability of 30 collector units or more and a thermal conductivity of 0.4 OW m. -l K-1 or more.
  • Figure 1 is an explanatory diagram showing the state of conduction heat transfer and heat dissipation heat transfer in a cross section of a cigarette.
  • FIG. 2 is a diagram showing the time change of the temperature of the ignition point of the cigarette paper of the cigarette according to the present invention with the thermal conductivity of the cigarette paper as a parameter.
  • FIG. 3 is a diagram showing the time change of the temperature of the ignition point of the cigarette paper of the cigarette according to the present invention with the thermal conductivity of the paper ash as a parameter.
  • the present inventors have found that a cigarette in a natural combustion state repeats ignition and extinguishing of wrapping paper, and combustion proceeds intermittently. This was made clearer by taking a video of the burning of cigarettes and graphing the change over time in the burning position of the cigarette paper. In other words, it was found that when the wrapping paper ignites, the combustion position moves a little, but the wrapping paper extinguishes the fire immediately and the combustion position repeats if the combustion position does not move for a while.
  • FIG. 1 schematically shows a cross section of a cigarette 10.
  • the cigarette 10 has a structure in which a cigarette cut 20 is wound around a cigarette paper 30.
  • reference numeral 21 denotes a burning tobacco cut
  • reference numeral 31 denotes a cigarette ignition point (the point where the fire is extinguished but reignition occurs at present)
  • reference numeral 22 denotes a cigarette cut in contact with the cigarette ignition point
  • Numerals 32 indicate rolled paper ash, respectively.
  • the arrows in Fig. 1 indicate conduction or radiative heat transfer.
  • the change over time of the ignition point 31 of the wrapping paper is expressed by the following equation (1). Further, the time change of the temperature of the tobacco cut 22 in contact with the wrapping paper ignition point 31 included in the equation (1) is expressed by the following equation (2). ⁇ ⁇ ⁇ 2 ⁇ ⁇ ⁇ ⁇ ⁇
  • epsilon p emissivity of the emissivity or the wrapper ash wrapping paper [One]
  • ⁇ Stefan-Boltzmann constant [W m "2 K" 4 ]
  • T ⁇ ambient temperature [K]
  • tp overall absorption rate of between cut tobacco and ⁇ or the wrapping paper ash [One]
  • T t Tobacco temperature [K]
  • ⁇ t Tobacco cut thermal conductivity [W m-1 K- 1 ]
  • the time change (left side) of the temperature of the ignition point 31 of the paper roll is due to the heat transfer from the tobacco cut 21 to the paper ignition point 31 through the paper ash 32.
  • the first term on the right side the term due to radiant heat transfer from the outer surface of the cigarette to the outside (the second term on the right side), the radiative transfer from the burning tobacco cut 21 to the ignition point 31 of the paper roll.
  • the sum of the term due to heat (term 3 on the right side) and the term due to heat transfer from the ignition point 31 to the tobacco cut 22 through the wrapping paper (term 4 on the right side) Means that
  • Equation (2) shows that the temperature change (left side) of the tobacco cut 22 in contact with the paper ignition point 3 1 is the heat transfer from the burning tobacco cut to the tobacco cut 2 through the tobacco cut 2 2.
  • the first term on the right side the term due to the heat transfer from the ignition point 31 to the tobacco section 22 (the second section on the right side), and the tobacco section from the burning tobacco section through the tobacco section.
  • the term due to radiative heat transfer to step 22 the third term on the right side
  • the conduction heat transfer from tobacco step 22 to the tobacco step 20 on the cold side through the tobacco step The fourth term on the right-hand side).
  • the objective of the present invention is achieved by changing the temperature over time expressed by the equations (1) and (2). Should be small.
  • the present inventors have determined that various expressions in the expressions (1) and (2) By changing the parameters, the effect of the ignition point 31 of the wrapper on the temperature over time was calculated. At this time, the thermal conductivity, heat capacity and emissivity of the wrapping paper and wrapping paper ash were examined as parameters. As a result, to reduce the natural burning rate (SBR) of cigarettes, either increase the thermal conductivity of the wrapper or reduce the thermal conductivity of the ash. It is most effective to increase the emissivity of the wrapping paper, and the change in the heat capacity of the wrapping paper / wrapping ash does not significantly affect the time change of the temperature. I got it.
  • SBR natural burning rate
  • Figure 2 shows the change over time of the ignition point temperature of the wrapping paper, and the thermal conductivity of the wrapping paper as a parameter.
  • the reference example is a calculation example in which the thermal conductivity of the wrapper is a standard value
  • the solid line is a case in which the thermal conductivity of the wrapper is 20% lower than the reference example (20%).
  • the dashed line is a calculation example when the thermal conductivity of the wrapping paper is 20% higher than the reference example (+ 20%). From this figure, it can be seen that by increasing the thermal conductivity of the wrapping paper, the temperature of the ignition point of the wrapping paper is less likely to rise with time (the natural combustion rate decreases). I understand.
  • Fig. 3 shows the change over time of the ignition point of the wrapping paper with the thermal conductivity of the wrapping paper as a parameter.
  • the reference example is a calculation example when the thermal conductivity of the paper ash is a standard value
  • the solid line is a case where the thermal conductivity of the paper ash is 20% higher than the reference example (+2
  • the dashed line is a calculation example when the thermal conductivity of the wrapping paper ash is 20% lower (120%) than the reference example. From this figure, it can be seen that the thermal conductivity of the paper ash is reduced to reduce the temperature of the ignition point of the paper. Is difficult to rise with time (the natural combustion speed decreases).
  • the thermal conductivity of the wrapping paper and ash is not determined only by the air permeability of the wrapping paper, it is possible to use a wrapping paper having a high air permeability. Therefore, according to the present invention, a wrapping paper having a high air permeability, 30 collector units or more, and a thermal conductivity of 0.40 Wm-1K-1 or more is obtained. It can be used to provide cigarettes with low natural combustion rate. Such cigarettes with high air permeability and low natural combustion rate have not been known before.
  • the Te present invention odor, air permeability of the paper wrapper 2 0 0 Collector scan and data units Ru der less This is rather preferred, the thermal conductivity of the wrapping paper 0 EWM -. And 1 or less der Ru this - i K Is preferred.
  • the following method can be considered.
  • the thermal conductivity of the wrapping paper is increased by uniformly arranging the fibers constituting the wrapping paper to strengthen the web structure.
  • D Mix materials with high thermal conductivity (for example, metal or graphite) into the wrapping paper to increase the thermal conductivity of the wrapping paper.
  • the particle size which is usually used, is used instead of the filler in the sub-micron mouth.
  • a method using a filler having a coarse particle size (for example, a particle size of 1 ⁇ m or more) can be considered.
  • a method of increasing the emissivity of the wrapping paper a method of forming a particle layer having a high emissivity on the surface of the wrapping paper can be considered.
  • Cigarettes A to C are conventional ones, and cigarettes D and E relate to the present invention.
  • the wrapping paper used has a basis weight of 30 g / m 2 and does not contain any additives (combustion control agents).
  • As the filler calcium carbonate having an average particle size of 0.3 ⁇ m was used, and the mixing ratio of the filler was adjusted within a range of 10 to 30%.
  • the air permeability of these wrappers is in the range of 10 to 60 collector units [CU].
  • the thermal conductivity of the wrapping paper and the thermal conductivity of the wrapping ash are as shown in Table 1.
  • tobacco shreds were filled using a commercial blend at a packing density of 230 mg / cm 3. Using these tobacco cuts and wrapping paper, a cigarette with an outer diameter of 8 mm was manufactured.
  • Table 1 shows the results of measuring the natural burning rate (SBR) of cigarettes A to E under the standard smoking condition (ISO).
  • SBR natural burning rate
  • ISO standard smoking condition
  • the present invention it is possible to provide a cigarette in which the wrapping paper has a high air permeability and a low natural combustion rate.

Landscapes

  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne une cigarette obtenue en enroulant du tabac haché dans du papier à cigarettes caractérisé par une perméabilité de 30 unités Coresta maximum et une conductivité thermique de 0, 40 Wm-1K-1 maximum.
PCT/JP2000/009195 1999-12-27 2000-12-25 Cigarette WO2001048317A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24019/01A AU2401901A (en) 1999-12-27 2000-12-25 Cigarette

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP37179899 1999-12-27
JP11/371798 1999-12-27

Publications (1)

Publication Number Publication Date
WO2001048317A1 true WO2001048317A1 (fr) 2001-07-05

Family

ID=18499327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/009195 WO2001048317A1 (fr) 1999-12-27 2000-12-25 Cigarette

Country Status (2)

Country Link
AU (1) AU2401901A (fr)
WO (1) WO2001048317A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8178025B2 (en) 2004-12-03 2012-05-15 Georgia-Pacific Consumer Products Lp Embossing system and product made thereby with both perforate bosses in the cross machine direction and a macro pattern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290911A2 (fr) * 1987-05-15 1988-11-17 R.J. Reynolds Tobacco Company Article à fumer
EP0495567A2 (fr) * 1991-01-05 1992-07-22 Rothmans, Benson & Hedges Inc. Nouveau produit à fume
EP0513985A1 (fr) * 1991-04-12 1992-11-19 Philip Morris Products Inc. Cigarette et enveloppe à nombre contrôlé de bouffées
EP0842616A1 (fr) * 1996-11-14 1998-05-20 Schweitzer-Mauduit International, Inc. Papier à cigarette ayant des caractéristiques de cendre améliorées
EP0892110A1 (fr) * 1997-07-14 1999-01-20 Schweitzer-Mauduit International, Inc. Papiers d'enveloppe ayant une porosité haute et basse pour des articles de tabac et un procédé pour la fabrication des mêmes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290911A2 (fr) * 1987-05-15 1988-11-17 R.J. Reynolds Tobacco Company Article à fumer
EP0495567A2 (fr) * 1991-01-05 1992-07-22 Rothmans, Benson & Hedges Inc. Nouveau produit à fume
EP0513985A1 (fr) * 1991-04-12 1992-11-19 Philip Morris Products Inc. Cigarette et enveloppe à nombre contrôlé de bouffées
EP0842616A1 (fr) * 1996-11-14 1998-05-20 Schweitzer-Mauduit International, Inc. Papier à cigarette ayant des caractéristiques de cendre améliorées
EP0892110A1 (fr) * 1997-07-14 1999-01-20 Schweitzer-Mauduit International, Inc. Papiers d'enveloppe ayant une porosité haute et basse pour des articles de tabac et un procédé pour la fabrication des mêmes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8178025B2 (en) 2004-12-03 2012-05-15 Georgia-Pacific Consumer Products Lp Embossing system and product made thereby with both perforate bosses in the cross machine direction and a macro pattern

Also Published As

Publication number Publication date
AU2401901A (en) 2001-07-09

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