WO2003065828A1 - Cigarette - Google Patents

Abstract

A cigarette, comprising a tobacco part having cut tobacco wrapped in rod shape with tobacco paper, wherein the cut tobacco is formed so as to have cut widths of 1.2 mm or longer, and projected parts with a height of 1/3 or more of the thickness of the tobacco paper are orderly formed on a part or on the entire surface of the tobacco paper from the inner surface thereof with the projected parts thereof facing the cut tobacco side.

Description

 Specification

 Cigarette

Technical field

 The present invention relates to a cigarette, and more particularly to a cigarette in which the amount of carbon monoxide in mainstream tobacco smoke is reduced.

Background art

 Currently, there are various requirements for cigarettes. One of them is to reduce the amount of carbon monoxide in cigarette mainstream smoke.

 In Japanese Patent Application Laid-Open No. Hei 10-99067 (Patent No. 3206885), the present applicant has proposed that when embossed wrapping paper is used to make a cigarette cut, It is disclosed that not only is it possible to prevent dropping of the gas, but also that the mass ratio of carbon monoxide / tar (C0ZT ratio) in the mainstream smoke of tobacco can be reduced.

 An object of the present invention is to provide a cigarette in which the amount of carbon monoxide in mainstream tobacco smoke is further reduced, and as a result, a lower CO / T ratio can be realized.

Disclosure of the invention

 In order to achieve the above object, the present inventors have studied in more detail the embossing process applied to tobacco wrapping paper. As a result, the embossing process is applied to tobacco wrapping paper; It has been found that the above object can be achieved by setting the step width of the tobacco cut to a certain width or more. The present invention is based on this finding.

That is, according to the present invention, the tobacco cut is formed by the cigarette paper. The tobacco cut has a cutting width of 1.2 mm or more, and a part or the entire surface of the tobacco wrapper is formed from the inner surface of the tobacco wrapper. A cigarette is provided, in which convex portions having a thickness of 1 Z 3 or more are arranged and formed, and the convex portions are arranged so as to face the bulging side. You.

 In the present invention, it is more preferable that the tobacco cut has a cut width of 2.0 mm or more.

 In the present invention, the cigarette paper usually has a thickness of 10 to 50 m.

 In the present invention, each of the protrusions may have a frustum shape.

BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a schematic sectional view showing a cigarette according to an embodiment of the present invention.

 FIG. 2A is a plan view showing an example of embossed wrapping paper used in the present invention.

 FIG. 2B is a cross-sectional view of the wrapper shown in FIG. 2A, taken along line IIB-IBB.

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the present invention will be described in more detail.

The cigarette of the present invention has a tobacco portion in which a tobacco cut is wound in a mouth shape with tobacco wrapping paper. In the present invention, the nicks have a predetermined cutting width, and the cigarette paper is formed by arranging convex portions having a predetermined height from the inner surface thereof. evening Bako wrapping paper is arranged with its convex portion facing the side of the baked paper.

 FIG. 1 is a schematic cross-sectional view showing an enlarged part of a cigarette according to an embodiment of the present invention. The cigarette 10 shown in FIG. 1 has a bamboo cut rod 12 in which the tobacco cut is filled in a cylindrical shape, and the outer periphery thereof is wrapped by a cigarette wrapper 13, and the cigarette portion 11 is formed. Make up.

In the present invention, the tobacco cut forming the evening paco cut rod 12 has a cut width of 1.2 mm or more. If the cutting width is less than 1.2 mm, the effect of reducing carbon monoxide in mainstream smoke cannot be sufficiently obtained even in combination with the cigarette paper of the present invention described in detail below. The cutting width of the tobacco cut is more preferably 2.0 mm or more. In the present invention, the cutting width of the tobacco cut is usually up to 3.0 mm. The tobacco cut having such a cutting width can be obtained by a conventionally known method (see Japanese Patent Application Laid-Open No. 2000-224798). The tobacco wrapping paper 13 wrapped around the perimeter of the tobacco cut rod 12 is formed by arranging convex portions 13a having a height equal to or more than 1/3 of the thickness of the tobacco wrapping paper 13 on its inner surface. In addition, the projection 13a is arranged with the convex portion 13a facing the tobacco chopping rod 12 side. If the height of the protrusion from the inner surface of the cigarette paper is less than 1/3, the effect of reducing carbon monoxide in the sidestream smoke cannot be sufficiently achieved even when combined with tobacco cuts with a cutting width of 1.2 mm or more. . In the present invention, the height of the projection 13a is usually 10 times or less the thickness of the cigarette paper. Convex part 1 3 formed on cigarette paper 1 3 a can usually be formed by embossing by molding using a means such as a mouthlet-shaped member. The emboss preferably has a pattern of lattice-shaped recesses (grooves).

The cigarette wrapper embossed according to the present invention is a wrapper commonly used for cigarettes. Such wrapping paper may have a basis weight of 16 to 60 g Zm ² and a filler such as calcium carbonate in a proportion of 0 to 60% by weight of a combustion aid such as sodium citrate. In an amount of 0 to 10% by mass. The thickness of tapaco wrapping paper is usually 30 to 50 ^ 111. And the evening baked wrapping paper may have a permeability of 0 to 100 cores per unit (C.U.) before embossing, but after embossing, it may have a permeability of 0 to 200 C.U. Air permeability.

 Needless to say, in the cigarette of the present invention, a filter commonly used for cigarettes can be connected to the rear end of the cigarette using a tipper.

 FIG. 2 is a plan view partially showing the inner surface of the embossed paper roll 13, and is a cross-sectional view taken along line IIB—IIB in FIG. 2B and FIG. 2A. It is shown enlarged.

The embossing applied to the wrapping paper 13 shown in Fig. 2 is a rectangular grid (square grid or rectangular grid) -shaped groove pattern that is practically the same shape. Except for, it is formed over the entirety of the wrapping paper 13. In FIGS. 2A and 2B, the cross-sections are inverted trapezoidal shapes that extend parallel to each other in the horizontal direction of the figure (hereinafter, also referred to as the “lateral” direction, which can be the longitudinal axis of the cigarette). Groove 1 3 1 — al to 1 3 1 — a 4 Inverted trapezoidal grooves 13 1 —b 1 to 13 1 -b 6 extending parallel to each other in a direction perpendicular to these grooves (hereinafter also referred to as “vertical” directions) appear. Each planar rectangular area defined by these grooves 1 3 1 — al to 1 3 1 — a 4, 1 3 1 1 b 1 to 1 3 1 — b 6 projects three-dimensionally into a truncated quadrangular pyramid The projection 13 2 (corresponding to the projection 13 a in FIG. 1) is formed. The protruding top surface of the truncated quadrangular pyramid forms a flat rectangular surface, and the wrapping paper 13 is wound so that the rectangular top surface comes into contact with the tobacco chopping rod 12 in Fig. 1. The preferred size of the emboss is described including the thickness of the wrapping paper 13. 2A and 2B, the vertical length of the substantially flat rectangular top surface of the projection 1332 is A, the horizontal length is A ', and the bottom of the projection 132. The length in the vertical direction up to the edge of the rectangular top surface is B, the length in the horizontal direction is B ', the width of the bottom of the groove extending in the horizontal direction is C, and the width of the groove extending in the vertical direction is C'. The emboss pitch in the vertical direction (A + 2B + C) is D, the emboss pitch in the horizontal direction (A, + 2B '+ C') is D, and the depth of each groove (projection 13 2 , And the embossing depth ED) is E, and the thickness of the wrapping paper 13 (before embossing) is F, these preferred dimensions are within the following ranges, respectively. It is in.

 A and A ': 5 to 100 m, respectively (preferably, 5 to 400 m, respectively)

 B and B ': 10 to 500 m, respectively (preferably, 10 to 200 m, respectively)

C and C ': 0 to 400 / im (preferably, (200 to 300 tm respectively)

 E: 10 to 300 1 (preferably 40 to 150 / Xm)

 F: 10 to 50 m (preferably 25 to 40 m

H m).

 The emboss depth can be measured using a stylus type three-dimensional roughness measuring instrument (for example, SE_3AK manufactured by Kosaka Laboratories).

 In FIG. 2, the embossed dot has a truncated square pyramid shape, but the embossed dot shape of the present invention is not limited to this. For example, embossed dots with pyramidal shapes (pyramidal and conical shapes) and truncated pyramid shapes other than quadrangular pyramid shapes (for example, triangular pyramid shapes, pentagonal pyramid shapes, and other truncated pyramid shapes other than quadrangular pyramids, and truncated cone shapes) Can be used. However, a truncated pyramid-shaped (frustum of pyramid and truncated cone) embossed dots are preferred, and a frustum of a quadrangular pyramid is particularly preferred.

 The cigarette of the present invention uses a cigarette cut having a predetermined step size and also uses a wrapping paper which has been subjected to a predetermined embossing process, so that the amount of carbon monoxide in the mainstream smoke is reduced synergistically. Therefore, the C0ZT ratio also decreases synergistically.

 Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

 Example

A cigarette with the same configuration as a normal cigarette with a filter (diameter: 8 mm, cut length: 59 mm, filter length: 25 mm) was prepared using cigarette shreds and wrapping paper with the following specifications. , Chip paper was attached to the rear end, and the cigarette samples shown in Table 1 below were prepared. Five cigarette samples were prepared for each cigarette.

 <Cigarette cut>

 Evening value: 5 mg per cigarette

 Cutting width: 0.8 mm or 2 mm.

 Gulp paper A (without embossing)>

 Basis weight: 22 g / m2

 Filler: calcium carbonate

 Filler mixing ratio: 28 mass%

 Auxiliary agent: sodium citrate

 Amount of flame retardant added: 1% by mass

 Thickness: 3 2 m

 Air permeability: 24 C.U.

 Paper roll B (with embossing>

 Basis weight: 2 2 g Zm2

 Filler: calcium carbonate

 Filler blending ratio: 28 mass%

 Auxiliary agent: sodium citrate

 Amount of flame retardant added: 1% by mass

 Thickness: 3 2 m

 Emboss pitch: 0.64 mm

 Emboss depth: 8 5 _i m

 Embossed shape: Square truncated pyramid shape

Emboss dot width (corresponding to A + 2B in Fig. 2): 0. 4 mm

 Air permeability: 80 C.U.

 Winding state: Wind the convex part to the notch side

 Each cigarette sample was placed vertically on a smoke evacuator (RGC system R26, manufactured by Borgwaldt) to ignite the tip, spontaneously burn, and eliminate the effects of dilution and diffusion from the paper roll. When the line reaches the position 5 mm from the tip of the tip paper, a single smoke absorption (smoke absorption time: 2 seconds; smoke absorption volume 35 mL) is performed, and the mainstream smoke is gas-bagged (Supelco Tedera). (Knock). The collected mainstream smoke was subjected to gas chromatography (Micro GC M200H manufactured by Agilent) to measure the amount of carbon monoxide (CO). The results are shown in Table 1.

 Table 1: C 0 content in mainstream smoke for each cigarette sample

表 1 に示すよ う に、 使用するタバコ刻みの刻み幅を 1 . 2 m m以上とするだけでも、 また巻紙にエンボス加工を施すだ けでも、 C Oの生成量を 1 5 %程度低減させる こ とができる が、 両者を組み合わせる ことによ り 、 4 1 % もの C O量低減 率が達成できる。 この結果か ら、 本発明によ り所定の刻み幅 を有するタバコ刻みを用いる と同時に所定のエンボス加工を 施した巻紙を用いる ことの相乗効果が明らかである。 以上述べたよう に、 本発明によれば、 タバコ主流煙中の一 酸化炭素量がより一層低減されたシガレツ 卜が提供される。

As shown in Table 1, the amount of CO generated can be reduced by about 15% by simply setting the cut width of the tobacco cut used to at least 1.2 mm or simply embossing the wrapping paper. However, by combining the two, a CO reduction rate of as much as 41% can be achieved. From these results, the synergistic effect of using the cigarette paper having the predetermined width according to the present invention and simultaneously using the wrapping paper subjected to the predetermined embossing is apparent. As described above, according to the present invention, there is provided a cigarette in which the amount of carbon monoxide in mainstream tobacco smoke is further reduced.

Claims

The scope of the claims  1. A cigarette wrapped in a tobacco wrapper in a rod shape with cigarette wrapping paper, the tobacco crush has a cutting width of 1.2 mm or more, and a part or the entirety of the tobacco wrapper. A convex portion having a height equal to or more than 1/3 of the thickness of the cigarette wrapping paper is arranged and formed from the inner surface thereof, and the convex portion is disposed facing the tobacco cut side. Cigarettes.  2. The cigarette according to claim 1, wherein the tobacco cut has a cut width of 2.0 mm or more.  3. The cigarette according to claim 1, wherein the tobacco cut has a cut width of up to 3 mm.  4. The cigarette according to claim 1, wherein the protrusion has a height up to 10 times the thickness of the cigarette wrapper.  5. The cigarette of claim 1, wherein the cigarette wrapper has a thickness of 10 to 50 m.  6. The cigarette according to claim 1, wherein each of the convex portions has a frustum shape.