JP3204549B2 - cigarette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cigarette, and more particularly, to an improvement in a plug paper for providing a cigarette having a small variation in air inflow from a filter (filter ventilation).

[0002]

2. Description of the Related Art An ordinary cigarette filter is formed into a cylindrical shape from a fiber filter material such as cellulose diacetate wound by a plug wrapping paper. Chip paper is used for connection between the filter and the tobacco winding. In recent years, in order to reduce the amount of smoke components flowing out of the filter suction end, air is filtered from the side of the filter by a perforated filter that combines a breathable plug paper and chip paper perforated by static electricity, laser, etc. Means for inflow are often used. In such a perforated filter, diluted inflow air is introduced from the periphery of the filter at the mouth end, and tobacco smoke is introduced into the mouth of the smoker from the center.

[0003]

In the above cigarettes of the prior art, it has been confirmed that even if the same material is used, that is, the filter, the plug wrapping paper, and the chip paper, large variations occur in the filter ventilation of products. Since the filter ventilation greatly correlates with the amount of the smoke component, its variation is not desirable.

Accordingly, an object of the present invention is to provide a cigarette in which filter ventilation is reliably controlled.

[0005]

Means for Solving the Problems In order to achieve the above object, the present inventor studied the variation of filter ventilation in a perforated filter type cigarette. As a result of various experiments, the following conclusions were obtained. Obtained. That is, the variation is caused by the tightness between the plug paper (or the filter peripheral surface itself when no plug paper is used) and the chip paper, which is not directly related to the air permeability of the material itself. Depending on the degree of the adhesion, the ventilation area when the dilution air passes through the permeable plug wrapping paper is different for each product. Therefore, even if the same material is used, filter ventilation cannot be controlled uniformly.

Based on such a viewpoint, the present inventor has further repeated trial and error. As a result, as shown in the experimental results described below, the filter ventilation is formed by forming an embossment on the plug wrapping paper of the filter corresponding to the ventilation opening of the tip paper and separating the opening from the plug wrapping paper. It has been found that not only does it improve, but its variability is reduced.

Accordingly, a cigarette according to the present invention comprises a filter having a filter medium and a plug wrapping paper wound therearound, a cigarette roll, and a tip paper having a plurality of openings and connecting the filter and the cigarette roll. , Wherein the plug web is embossed in a region corresponding to the opening of the tip paper.

[0008]

According to the present invention having the above-described structure, the emboss causes a slight gap between the tip paper and the peripheral surface of the plug winding paper around the opening. Thereby, the adhesion between the tip paper and the peripheral surface of the plug winding paper is relaxed, and the filter ventilation from the opening is improved, and the dispersion of the filter ventilation is reduced.

[0009]

1 is an exploded partial perspective view showing a first embodiment of a cigarette according to the present invention. The cigarette 10 includes a cigarette roll 12 and a filter 14. The filter 14 is made of a fiber filter material 20 such as cellulose diacetate wound by a plug paper 18. The connection between the filter 14 and the tobacco winding 12 is made by using a tip paper 1
6 is used.

The cigarette 10 is of the aperture filter type. Therefore, in order to reduce the amount of smoke component flowing out from the filter suction end, a plug wrapping paper 18 having a high air permeability of Coresta air permeability of 1000 or more is used, and the chip paper 16 has a small opening 22 for ventilation. Are formed in a row, a plurality of rows, or irregularly (two rows in the present embodiment) along the circumferential direction. The opening 22 of the chip paper 16 can be formed by a known means such as static electricity or laser. In the cigarette 10 of this type, diluted inflow air is introduced from the periphery of the filter at the mouth end, and tobacco smoke is introduced into the mouth of the smoker from the center.

The plug winding paper 18 is provided with a square emboss 24 on the entire surface thereof. The emboss 24 is formed by being molded by means such as a knurled member. Therefore, the emboss 24 distributes irregularities over the entire area including the opening 22.

With the above structure, in the cigarette according to the present invention, the emboss 24 causes a slight gap between the tip paper 16 and the plug winding paper 18 around the opening 22. Therefore, the adhesion between the members 16 and 18 is reduced, and the air permeability from the opening 22 to the web 18 is improved. In addition to this, the embossing 24 reduces the variation in the air permeability. As a result, filter ventilation is improved, and variations in the filter ventilation are reduced.

The depth of the emboss 24 is 0.01 to 1.0.
mm, preferably in the range of 0.02 to 0.06 mm. Above this range, there is a problem in cigarette winding, and below this range, the effect of the emboss 24 cannot be obtained sufficiently. The depth of the emboss 24 can be measured using a stylus type three-dimensional roughness measuring device (SE-3AK manufactured by Kosaka Laboratory).

It is desirable that the surface of the emboss 24 which is in contact with the pressing convex is arranged on the chip paper 16 side. When the contact surface is arranged on the tip paper 16 side, the opening 2
2 can be sufficiently separated from the plug wrapping paper 18 of the filter 14 and vice versa.

FIG. 2 is an exploded partial perspective view showing a second embodiment of the cigarette according to the present invention. In FIG. 2, portions corresponding to those of the first embodiment shown in FIG.

In this embodiment, the plug web 18
The emboss 24 is disposed only along the direction in which the openings 22 of the chip paper 16 are arranged. The emboss 24 is formed by molding a band-shaped circumferential region including the opening 22 by a means such as a knurled member. Therefore, the emboss 24 distributes unevenness over the entire belt-like region including the opening 22.

When the emboss 24 is formed only on a part of the plug winding paper 18 as in this embodiment, the emboss 24
Is preferably at least 1 mm on each side of the opening 22, that is, L ≧ 1 mm in FIG. 3, and more preferably L ≧ 2 mm. Below this, all the openings 22 may not be sufficiently separated from the plug winding paper 18.

The embossing pattern can take various forms other than the pattern of the oblique lattice grooves in the embodiment shown in FIGS. 4 to 6 show basic examples thereof. The emboss 25 shown in FIG. 4 is a pattern of grooves parallel to the rows of the openings 22. The emboss 26 shown in FIG. 5 is a pattern of grooves orthogonal to the rows of the openings 22. Emboss 2 shown in FIG.
Reference numeral 7 denotes a square lattice pattern.

FIGS. 7 and 8 are exploded perspective views showing third and fourth embodiments of the cigarette according to the present invention. In the figure,
1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

In the third embodiment shown in FIG. 7, an emboss 24 is formed on the entire plug wrapping paper 18 as in the first embodiment, and in the fourth embodiment shown in FIG. As in the embodiment, an emboss 24 is formed on a part of the plug web 18.

In these embodiments, the filter 1
Reference numeral 4 denotes a so-called dual filter structure including first and second filter elements 28 and 29 (for example, each having a length of 15 mm and 10 mm). The first filter element 28 is generally referred to as an acetate filter, and is made of a fiber filter material such as cellulose diacetate which has been formed into a filter plug by being wrapped with a plug wrapper (which will be located inside the plug wrapper 18). . On the other hand, the second filter element 29 is generally called a charcoal filter, and is pre-wound with a plug wrapping paper (which will be located inside the plug wrapping paper 18) and formed as a filter plug. It is made of a fiber filtration material such as acetate.

First and second filter elements 28, 29
Is wound and integrated by an embossed plug winding paper 18. Therefore, in this case, the plug web 18
Is also known as molded paper. The terms "filter" and "embossed plug web" in the present invention also include such a dual-structure or triple-structure filter described below and a plug web (molded paper) used therein. .

FIGS. 9 and 10 are exploded perspective views showing fifth and sixth embodiments of the cigarette according to the present invention. In the figure, portions corresponding to those of the first and second embodiments shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

In the fifth embodiment shown in FIG. 9, the emboss 24 is formed on the entire plug web 18 in the same manner as in the first embodiment, and in the sixth embodiment shown in FIG. As in the embodiment, an emboss 24 is formed on a part of the plug web 18.

In these embodiments, the filter 1
Reference numeral 4 denotes a so-called triple filter structure including first and second filter elements 31 and 32 and an intermediate portion 33 formed therebetween. First and second filter elements 3
Reference numerals 1 and 32 are generally called acetate filters, and are made of a fiber filter material such as cellulose diacetate which is wound in advance on a plug wrapping paper (located inside the plug wrapping paper 18) and formed as a filter plug. The intermediate portion 33 is provided with the two filter elements 31, 3 separated from each other.
It is formed by filling a gas adsorbent such as activated carbon between the two. The first and second filter elements 31, 32 and the intermediate portion 33 are wound and integrated by the embossed plug winding paper 18.

Although the first to sixth embodiments have been described with reference to the chip paper 16 having two rows of openings 22, the present invention relates to a chip paper having more openings 22 formed therein. For example, the present invention can be applied to a porous tip paper. In this case, the effect of the present invention can be obtained even if an emboss is formed on the plug winding paper corresponding to a part of the opening of the porous tip paper.

An experimental example relating to the cigarette of the above embodiment is shown below.

[Experimental Example 1] A plug winding paper 18 having an emboss 24 (pattern shown in FIG. 3) composed of a pattern of oblique lattice grooves was used on the entire surface, and the present invention shown in FIG. A cigarette sample B according to the first example was formed. For comparison, a cigarette sample A having the same structure except that no emboss was provided was formed. Conditions other than embossing of each sample, such as materials,
The formation method and the like are common under the conditions shown in the table. Here, the cigarette total length is 84 mm, the filter length is 25 mm,
The winding circumference is 25 mm, and the ventilation resistance of the tobacco winding part is 80 mmH ₂ O.

For each of the above samples, 100 samples were prepared, attached to a ventilation meter, and their filter ventilation was measured.
Table 1 shows the results. In the table, the unit of the air permeability of the tip paper and the plug winding paper is Cholesta, X is the average value of the filter ventilation ratio, σ is its standard deviation,
CV is the coefficient of variation represented by the following equation.

CV = (σ / X) × 100 (%) As shown in Table 1, the sample B according to the present invention has improved filter ventilation compared to the sample A without embossing, It was confirmed that the dispersion of the filter ventilation was small.

[0031]

[Table 1] [Experimental Example 2] A plug winding paper 18 having an emboss 24 (pattern shown in FIG. 3) formed of a pattern of grooves in an oblique lattice pattern was used on the entire surface. A cigarette sample D having a dual filter structure according to the example was formed. For comparison, a cigarette sample C having a similar structure except that no emboss was provided was formed. Conditions other than emboss of each sample,
For example, materials, forming methods, and the like are common under the conditions shown in the table. Here, the total cigarette length is 84 mm, the first filter element length is 15 mm, the second filter element length is 10 mm,
The winding circumference is 25 mm, and the ventilation resistance of the tobacco winding part is 80 mmH ₂ O.

For each of the above samples, 100 samples were prepared, attached to a ventilation meter, and their filter ventilation was measured.
Table 2 shows the results. In the table, the unit of the air permeability of the tip paper and the plug winding paper is Cholesta, X is the average value of the filter ventilation ratio, σ is its standard deviation,
CV is the coefficient of variation represented by the following equation.

CV = (σ / X) × 100 (%) As shown in Table 2, the sample D according to the present invention has improved filter ventilation as compared with the sample C having no emboss formed thereon. It was confirmed that the dispersion of the filter ventilation was small.

[0034]

[Table 2]

[0035]

According to the cigarette according to the present invention, not only the filter ventilation of the cigarette is improved but also the embossment is provided on the plug wrapping paper corresponding to the ventilation opening of the chip paper, and the filter ventilation of the cigarette is improved. Variation can be reduced. That is, the filter ventilation of the cigarette can be surely controlled, thereby providing a desired amount of smoke component.

[Brief description of the drawings]

FIG. 1 is an exploded partial perspective view showing a first embodiment of a cigarette according to the present invention.

FIG. 2 is an exploded partial perspective view showing a second embodiment of the cigarette according to the present invention.

FIG. 3 is an enlarged schematic view showing an emboss of the plug web of the first and second embodiments.

FIG. 4 is a schematic diagram showing a modified example of embossing of a plug winding paper.

FIG. 5 is a schematic view showing another modification of the embossing of the plug winding paper.

FIG. 6 is a schematic diagram showing still another modification of the embossing of the plug winding paper.

FIG. 7 is an exploded partial perspective view showing a third embodiment of the cigarette according to the present invention.

FIG. 8 is an exploded partial perspective view showing a fourth embodiment of the cigarette according to the present invention.

FIG. 9 is an exploded partial perspective view showing a fifth embodiment of the cigarette according to the present invention.

FIG. 10 is an exploded partial perspective view showing a sixth embodiment of the cigarette according to the present invention.

[Explanation of symbols]

10 cigarette, 12 cigarette roll, 14 filter, 16 tip paper, 18 plug roll paper, 20
... Filter material, 22 ... Open hole, 24, 25, 26, 27 ... Emboss, 28, 29, 31, 32 ... Filter element, 33
... the middle part.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Takashi Koyama 6-2, Umedaoka, Midori-ku, Yokohama-shi, Kanagawa Prefecture Inside the Tobacco Central Research Laboratories of Japan Tobacco Inc. (56) References Japanese Patent Laid-Open No. 50-20,000 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A24D 3/04 A24D 1/02 A24D 1/04 D21H 27/00

Claims (5)

(57) [Claims] 1. A filter material and wound around the filter material
The filter includes a filter having a breathable plug wrapping paper, a tobacco wrap, and a tip paper having a plurality of openings through which air for filter ventilation flows and connecting the filter and the tobacco wrap. An aperture filter type cigarette, which reduces the dispersion of the filter ventilation.
Between the tip paper and the plug web
In order to reduce the adhesiveness of the plug paper, emboss the plug paper in the area corresponding to the opening of the chip paper.
A cigarette characterized in that a cigarette is formed . 2. The plug web has a Coresta air permeability of 100.
2. The article according to claim 1, wherein the article has air permeability of 0 or more.
Cigarette on the list. 3. The depth of the emboss is 0.01 to 1.0 m.
m, wherein the depth is within the range of m.
Is the cigarette according to 2. 4. The emboss has a lattice-like groove.
The cigarette according to any one of claims 1 to 3, wherein
To 5. The embossment extends along the direction in which the openings are arranged.
5. The method as claimed in claim 1, wherein the first and second members are arranged only at the first position.
The cigarette described in somewhere.