WO2012090294A1

WO2012090294A1 - Smoking article provided with carbon heat source

Info

Publication number: WO2012090294A1
Application number: PCT/JP2010/073687
Authority: WO
Inventors: 隆太郎鶴泉
Original assignee: 日本たばこ産業株式会社
Priority date: 2010-12-28
Filing date: 2010-12-28
Publication date: 2012-07-05

Abstract

A smoking article (1) provided with carbon heat source, said smoking article comprising: a paper pipe (20) having a multi-layered tubular structure, wherein each tube is formed of a laminated sheet which comprises at least one aluminum layer (26) and at least one paper layer (24); a carbon heat source (4) held at the front end of the paper pipe (20); and a flavor generating source (6) provided within the paper pipe (20), wherein the paper pipe (20) comprises a heat insulating layer (30), which at least surrounds the carbon heat source (4), and the heat insulating layer (30) is formed by airpockets (34, 36) which are distributed among tubes being adjacent to each other.

Description

Smoking articles with carbon heat source

The present invention relates to a smoking article equipped with a carbon heat source, and more particularly, to a paper tube holding the carbon heat source.

A smoking article disclosed in Patent Document 1 is known as one of smoking articles of this type. The smoking article of Patent Document 1 includes a paper tube composed of a metal layer and a paper layer, a carbon heat source held in the paper tube and combusted by ignition, and disposed in the paper tube adjacent to the carbon heat source. And a flavor generating source that releases the flavor when heated by receiving the combustion heat.
Furthermore, the smoking article of Patent Document 1 further includes a glass mat. This glass mat is wound around the outer peripheral surface of the carbon heat source and functions as a heat insulating material for the paper tube. Therefore, the glass mat suppresses the combustion heat of the carbon heat source from being radiated to the outside of the paper tube through the paper tube. As a result, the combustion heat of the carbon heat source is effectively transferred to the flavor generating source, and the flavor generating source effectively releases the flavor.

On the other hand, the smoking article disclosed in Patent Document 2 includes, instead of the glass mat, a lip-shaped inner sleeve that is in direct contact with a carbon heat source, and an outer sleeve disposed outside the inner sleeve, and the outer layer. A predetermined gap is secured between the sleeve and the carbon heat source. Such inner and outer sleeves also effectively transfer the combustion heat of the carbon heat source to the flavor source.

WO 2007/119678 A1 JP 2-84165 A

In the case of the smoking article of Patent Document 1 described above, since the glass mat is wound around the entire outer peripheral surface of the carbon heat source, such a glass mat deteriorates the ignitability of the carbon heat source. In addition, the use of the glass mat not only increases the number of parts of the smoking article, but also increases the manufacturing cost of the smoking article because the wrapping process of the glass mat additionally requires the manufacture of the smoking article.

In the case of the smoking article of Patent Document 2, the inner layer and the outer layer sleeve are arranged together with a carbon heat source in a paper tube made of a wrapping paper, but such a structure complicates the structure of the smoking article. Therefore, the manufacture of the smoking article of Patent Document 2 is difficult and its productivity is poor.
An object of the present invention is to provide a smoking article provided with a carbon heat source that can efficiently transfer the combustion heat of the carbon heat source to the flavor generating source and can reduce the number of parts and improve the productivity. is there.

In order to achieve the above object, a smoking article equipped with a carbon heat source according to the present invention is a paper pipe having a multiple tube structure, each tube including at least one metal layer and a paper layer. And a combustible carbon heat source held at the tip of the paper pipe and having air permeability, and at least a part of the outer peripheral surface thereof is directly on the inner peripheral wall of the paper pipe. Adhering carbon heat source and a breathable flavor generating source that is arranged in the paper pipe and extends from the carbon heat source toward the base end of the paper pipe, receives the combustion heat of the carbon heat source, and the flavor A paper pipe is disposed between at least one pair of adjacent tubes and further includes a heat insulating layer surrounding at least the carbon heat source, the heat insulating layer being distributed between the tubes. To provide a smoking article characterized by being formed by a pocket.

The paper pipe includes a heat insulating layer, which exhibits a high heat insulating effect and suppresses the combustion heat of the carbon heat source from escaping outside the paper pipe. Therefore, the flavor generating source is efficiently heated by the combustion heat of the carbon heat source. Therefore, the flavor is released well from the flavor generation source, and the user can enjoy the flavor.
Further, in addition to the above-described heat insulating function, the heat insulating layer firmly holds the carbon heat source on the paper pipe and imparts an elastic force in the radial direction of the paper pipe to soften the external force applied to the paper pipe. Therefore, the paper pipe can reliably hold the carbon heat source by its elastic force without causing the carbon heat source to fall off. Furthermore, even when the user drops a smoking article having a carbon heat source that is relatively easy to break, the paper pipe can prevent the carbon heat source from being damaged by its elastic force.

Specifically, in one set of laminated sheets, one laminated sheet has an embossed surface that forms a heat insulating layer between the other laminated sheet. Therefore, the manufacture of the smoking article does not require a heat insulating material such as a glass mat or a step of winding the heat insulating material around the carbon heat source, and as a result, the smoking article can be manufactured easily and inexpensively.
Specifically, the paper pipe includes an inner tube that forms the inner peripheral surface of the paper pipe, an outer tube that forms the outer peripheral surface of the paper pipe, and a middle tube disposed between the inner and outer tubes. .

Preferably, the heat insulation layers are disposed between the inner and middle tubes and between the middle and outer tubes, respectively.
The heat insulating layer may be disposed between the carbon heat source and the inner tube, and between the inner and middle tubes.

Moreover, it is desirable that the heat insulation layer extends from the front end to the base end of the paper pipe. In this case, since the heat insulation layer extends over the entire area of the paper pipe in the axial direction of the paper pipe, the temperature rise of the entire outer surface of the paper pipe is suppressed.
Moreover, it is preferable that the flavor generation source is disposed adjacent to the carbon heat source.
The smoking article may further include a filter connected to the proximal end of the paper pipe via the tip paper.

According to the smoking article provided with the carbon heat source of the present invention, the paper pipe has the heat insulating layer, so that the combustion heat of the carbon heat source can be efficiently transmitted to the flavor generation source, and can be manufactured easily and inexpensively. .

It is sectional drawing of the smoking article provided with the carbon heat source which concerns on 1st Example of this invention. It is an expanded sectional view of the paper pipe which shows the site | part A of FIG. It is the expanded sectional view which showed a part of smoking article provided with the carbon heat source which concerns on 2nd Example of this invention. It is sectional drawing of the smoking article provided with the carbon heat source which concerns on 3rd Example of this invention. It is sectional drawing of the smoking article provided with the carbon heat source which concerns on 4th Example of this invention.

Referring to FIG. 1, the smoking article 1 of the first embodiment includes a tobacco rod 2. The tobacco rod 2 includes a hollow cylindrical paper pipe 20, and a columnar carbon heat source 4 and a flavor generating source 6 are disposed inside the paper pipe 20. These carbon heat source 4 and flavor generating source 6 each have air permeability.
Specifically, the carbon heat source 4 has a plurality of axial holes (not shown), and these axial holes are formed through the carbon heat source 4. For this reason, the carbon heat source 4 is relatively easy to crack. The carbon heat source 4 is disposed in one end portion of the paper pipe 20, that is, in the tip end portion, and is held in close contact with the inner peripheral wall of the paper pipe 20. That is, the outer diameter of the carbon heat source 4 is substantially equal to the inner diameter of the paper pipe 20. In the case of this embodiment, the tip of the carbon heat source 4 protrudes from the tip edge of the paper pipe 20. Therefore, the user can easily burn the carbon heat source 20 by igniting the protruding end of the carbon heat source 20.

On the other hand, the flavor generating source 6 is arranged side by side in the longitudinal direction of the paper pipe 20 in contact with the carbon heat source 4. That is, the flavor generating source 6 is positioned on the proximal end side of the paper pipe 20, that is, on the mouthpiece side. When the flavor generating source 6 is heated by receiving the combustion heat of the carbon heat source 4, the flavor generating source 6 releases the flavor. Specifically, the flavor generating source 6 is formed by cigarettes filled in the paper pipe 20 so as to ensure a predetermined air permeability, and the cigarettes are obtained by, for example, cutting tobacco leaves.

The paper pipe 20 described above has a multiple tube structure, and each tube is formed of a spiral laminated sheet and is bonded to each other via an adhesive. Specifically, as shown in FIG. 2, the paper pipe 20 includes triple tubes 22, and the laminated sheet forming each tube 22 includes at least one aluminum layer 26 and at least one paper layer 24.
Specifically, the inner tube 22 i includes one paper layer 24 and one aluminum layer 26, and the aluminum layer 26 here surrounds the outside of the paper layer 24. Therefore, the aluminum layer 26 of the inner tube 22 i forms the inner peripheral surface of the paper pipe 20 and is in direct contact with the carbon heat source 4 and the flavor generating source 6.

The middle tube 22m and the outer tube 22o each include two paper layers 24 and one aluminum layer 26, and each aluminum layer 26 is sandwiched between the paper layers 24, respectively. Therefore, when the inner tube 22i, the middle tube 22m, and the outer tube 22o are bonded together, the tubes adjacent to each other in the radial direction of the paper pipe 20 among the

tubes

22i, 22m, and 22o are bonded together with the paper layers 24. Yes. Therefore, the

tubes

22i, 22m, and 22o are firmly connected to each other, and a firm paper pipe 20 is provided.

Further, the middle tube 22m may be formed of a laminated sheet that has been embossed. Specifically, a large number of convex portions 32 are distributed uniformly or randomly on the inner peripheral surface of the middle tube 22m, while a large number of concave portions corresponding to the convex portions 32 are distributed on the outer peripheral surface. Therefore, in this case, when the middle tube 22m is formed on the outer peripheral surface of the inner tube 22i, the middle tube 22m comes into contact with the outer peripheral surface of the inner tube 22i at its convex portion 32. That is, the inner tube 22i and the middle tube 22m are in partial contact. As a result, between the inner tube 22i and the middle tube 22m, the adjacent convex portion 32 cooperates with the outer peripheral surface of the inner tube 22i to define the air pocket 34, and such an air pocket 34 is formed in the middle tube 22m. It is distributed over the entire inner peripheral surface. Similarly, when the outer tube 22o is formed on the outer peripheral surface of the middle tube 22m, the middle tube 22m and the outer tube 22o are partially in contact with each other. Air pockets 36 corresponding to the recessed portions are distributed. That is,

air pockets

34 and 36 that are intermittently continuous in the circumferential direction and the axial direction of the paper pipe 20 are arranged inside and outside the middle tube 22m in the paper pipe 20, and these

air pockets

34 and 36 are inside and outside the middle tube 22m. The heat insulation layers 30 are substantially formed, and these heat insulation layers 30 are formed of

air pockets

34 or 36 and extend from the front end to the base end of the paper pipe 20.

Furthermore, a rod-shaped filter 10 is connected to the base end of the tobacco rod 2 via a chip paper 18. The filter 10 is formed by wrapping filter fibers 12 with a packaging material 14. The filter 10 here may be a charcoal filter containing activated carbon inside, or may be a tandem filter combining a plain filter and a charcoal filter.

Therefore, when the carbon heat source 4 is ignited and the user sucks the smoking article 1 with the suction port of the smoking article 1, that is, the filter 10, the combustion heat of the carbon heat source 4 is axially within the carbon heat source 4 by the user's suction. Heat the air flowing through the holes. This heated air further passes through the flavor source 6 and is sucked into the user's mouth through the mouth of the smoking article 1. At this time, the flavor generating source 6 is heated by the heated air, and the flavor of the chopped tobacco, that is, the flavor component of the chopped tobacco is released into the heated air. As a result, the user can taste the flavor of tobacco.

By the way, since the heat insulation layer 30 described above exhibits a heat insulation effect, the combustion heat transmitted from the carbon heat source 4 to the paper pipe 20 is suppressed, and the combustion heat passes through the carbon heat source 4, that is, the flavor generation source 6. It can be heated effectively.
The present invention is not limited to the smoking article of the first embodiment described above, and various modifications are possible.
For example, the smoking article 1 of the second embodiment shown in FIG. 3 is embossed on the inner tube 20i and has a heat insulating layer 30 only on the outer side of the inner tube 20i. Even such a heat insulating layer 30 exhibits a sufficient heat insulating effect.

FIG. 4 shows a third embodiment, and the smoking article of the third embodiment corresponds to a smoking article obtained by adding a cavity 40 to the first or second embodiment. Specifically, the cavity 40 is secured between the carbon heat source 4 and the flavor generating source 6 in the paper pipe 20.
In order to verify the heat insulation effect of the heat insulation layer 30 of the smoking article of the above-described embodiment, the glass is used instead of the heat insulation layer in Comparative Example 1 without the heat insulation layer together with the smoking articles of Examples 1 and 2 belonging to the type of the third embodiment. Ten smoking articles of Comparative Example 2 each having a mat were prepared.

Specifically, the specifications of the paper pipe, embossing, and carbon heat source of Example 1 are as follows.
Paper pipe Length: 30 mm, inner diameter: 6.4 mm, paper layer thickness: 20 μm, each aluminum layer thickness: 20 μm, heat insulation layer: present inside and outside the middle tube Embossing Embossed shape: arc-shaped wave, depth in cross section Length: About 0.6mm
Carbon heat source Length: 10mm (projection length 5mm)

Regarding the specifications of the paper pipe, embossing, and carbon heat source of Example 2, the laminated sheet forming the inner tube 22i is embossed. In this case, the inner tube 22i and the inner tube 22i are interposed between the inner tube 22i and the middle tube 22m. This is different from Example 1 in that a heat insulating layer 30 exists between the carbon heat source 4 and the carbon heat source 4.
The paper pipe and carbon heat source of Comparative Example 1 differ from those of Examples 1 and 2 only in that the paper pipe does not have the heat insulating layer 30.

The paper pipe and carbon heat source of Comparative Example 2 differ from those of Examples 1 and 2 only in that the inner diameter of the paper pipe is 6.7 mm and a glass mat is wound around the carbon heat source.
In addition, regarding the smoking articles of Examples 1 and 2 and Comparative Examples 1 and 2, other specifications are the same.
In order to verify the above-mentioned heat insulation effect, a smoke absorption test was conducted on the smoking articles in the examples and comparative rows according to the Canadian smoke absorption condition (CIR condition), and the maximum temperature of the outer peripheral surface of the paper pipe was 15 mm away from the tip of the paper pipe. The average value of the maximum temperature for each of the actual example and the comparative example was obtained by measuring with a radiation thermometer.
Table 1 below shows the measurement results.

As shown in Table 1, the average maximum temperature of the outer surface of the paper pipe of Comparative Example 1 was 118.56 ° C., whereas the average maximum temperature of Comparative Example 2 was 104.25 ° C. For this reason, the glass mat wound around the carbon heat source lowers the average maximum temperature on the outer peripheral surface of the paper pipe and exhibits a heat insulating effect.
On the other hand, the average maximum temperatures of the outer surfaces of the paper pipes 20 of Example 1 and Example 2 were 97.98 ° C. and 99.54 ° C., respectively. These average maximum temperatures are both lower than the average maximum temperature of 104.25 ° C. in Comparative Example 2. This shows that the heat insulation layer 30 formed in the paper pipe 20 exhibits a heat insulation effect superior to the glass mat of Comparative Example 2. Furthermore, if the average maximum temperature of Example 1 and 2 is compared, the heat insulation effect of the heat insulation layer of Example 1 is further superior to the case of the heat insulation layer of Example 2.

Thus, the heat insulation layer 30 of the paper pipe 20 exhibits a high heat insulation effect, and the combustion heat of the carbon heat source 4 is prevented from escaping out of the paper pipe 20. Therefore, the flavor generating source 6 is efficiently heated by the combustion heat of the carbon heat source 4. Therefore, the flavor is released favorably from the flavor generation source 6, and the user can taste the flavor.
The heat insulating layer 30 can be obtained simply by embossing the laminated sheet forming the middle tube 22m or the inner tube 22i. Therefore, the manufacture of the smoking articles of Examples 1 and 2 does not require a heat insulating material such as a glass mat or the step of winding the heat insulating material around the carbon heat source 4, and the smoking articles of Examples 1 and 2 can be easily and inexpensively manufactured. It is.

Further, since the heat insulating layer 30 extends over the entire area of the paper pipe 20 with respect to the axial direction of the paper pipe 20, the temperature increase of the entire outer surface of the tobacco rod 2 is suppressed.
In addition to the heat insulating function described above, the heat insulating layer 30 holds the carbon heat source 4 firmly on the paper pipe 20 and provides an elastic force in the radial direction of the paper pipe 20 to relieve the external force applied to the paper pipe 20. Give. In order to verify the elastic force of such a paper pipe 20, five new paper pipes of Examples 1 and 2 and Comparative Example 1 were prepared.

A test was conducted on the paper pipes of Examples 1 and 2 and Comparative Example 1 to confirm the diameter of the pin gauge that caused the paper pipe to break or buckle. Specifically, first, a pin gauge having a diameter of 6.4 mm is inserted into the paper pipe by 5 mm from the opening at the tip. If the paper pipe is not torn or buckled by this insertion, the pin gauge insertion described above is repeated until the paper pipe is torn or buckled while replacing the pin cage with a diameter larger than the previous pin cage. It was. Here, the difference between the previous pin cage diameter and the current pin cage diameter is 0.01 mm.

Table 2 below shows the result of the above-described confirmation test, that is, the average maximum diameter of the pin gauge that caused the tearing or buckling in the paper pipes of Comparative Example 1 and Examples 1 and 2, that is, the allowable maximum inner diameter of the paper pipe. Show.

As shown in Table 2, the allowable maximum inner diameter of the paper pipe of Comparative Example 1 is 6.55 mm, whereas the allowable maximum inner diameters of the paper pipes of Examples 1 and 2 are 6.65 mm and 6.67 mm, respectively. . From this, it was confirmed that the paper pipes 20 of Examples 1 and 2 have greater elasticity in the radial direction than the paper pipe of Comparative Example 1. This means that the paper pipe 20 can prevent the carbon heat source 4 from falling off simply by press-fitting the carbon heat source 4 having an outer diameter larger than the inner diameter (6.40 mm) of the paper pipe 20 of Examples 1 and 2. It means that the carbon heat source 4 can be reliably held by the elastic force without inviting. Even if the user drops the smoking article 1 having the carbon heat source 4 that is relatively easy to break, the paper pipe 20 can prevent the carbon heat source 4 from being damaged by the elastic force.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, the heat insulating layer 30 may be formed between the middle tube 22m and the outer tube 22o by embossing a laminated sheet that forms the outer tube 22o of the paper pipe 20.
Moreover, the heat insulation layer 30 may be arrange | positioned in a part of axial direction of the paper pipe 20, and may be arrange | positioned in the whole region.

Further, the shape of the

air pockets

34 and 36 forming the heat insulating layer 30, that is, the emboss formed on the laminated sheet is not limited to the illustrated example, and has a cross-sectional shape such as a triangular wave or a trapezoidal wave. Moreover, the shape of the plan view is also arbitrary.
The aluminum layer 26 in the paper pipe 20 can be replaced with a metal layer made of another metal having low thermal conductivity.

Further, the paper pipe 20 may have a multiple structure including four or more tubes.
Further, as shown in FIG. 5, the carbon heat source 4 can have an end surface that is flush with the front end surface of the paper pipe 20. In this case, an external force is not directly applied to the carbon heat source 4, the falling of the carbon heat source 4 from the paper pipe 20 can be further prevented, and the appearance of the smoking article 1 is improved. Furthermore, since the paper pipe 20 surrounds the entire outer peripheral surface of the carbon heat source 4, even when the user drops the smoking article 1, damage to the carbon heat source 4 can be prevented more reliably.

Furthermore, the flavor generating source 6 may be anything that releases combustion by receiving combustion heat from the carbon heat source 4 in addition to the above-described cigarette.

DESCRIPTION OF SYMBOLS 1 Smoking article 2 Cigarette rod 4 Carbon heat source 6 Flavor generation source 10 Filter 12 Filter fiber 14 Packaging material 18 Chip paper 20 Paper pipe 22i Inner tube 22m Middle tube 22o Outer tube 24 Paper layer 26 Aluminum layer (metal layer)
30 Heat insulation layer 32 Convex part 34 Air pocket 36 Air pocket 40 Cavity

Claims

A paper pipe having a multiple tube structure, each tube being formed by a laminated sheet including at least one metal layer and a paper layer; and
A combustible carbon heat source held at the tip of the paper pipe, which has air permeability and has a carbon heat source in which at least a part of its outer peripheral surface is in direct contact with the inner peripheral wall of the paper pipe,
A breathable flavor generating source that is arranged in the paper pipe and extends from the carbon heat source toward the base end of the paper pipe in the paper pipe, receives the combustion heat of the carbon heat source, and releases the flavor A flavor source to
The paper pipe further includes a heat insulating layer disposed between at least one pair of tubes adjacent to each other and surrounding at least the carbon heat source, and the heat insulating layer is formed by air pockets distributed between the tubes. A smoking article with a characteristic carbon heat source.
2. The smoking article with a carbon heat source according to claim 1, wherein one laminated sheet of the pair of laminated sheets has an embossed surface that forms the heat insulating layer between the laminated sheet and the other laminated sheet. .
The paper pipe, an inner tube forming an inner peripheral surface of the paper pipe;
An outer tube forming the outer peripheral surface of the paper pipe;
The smoking article having a carbon heat source according to claim 2, comprising a middle tube disposed between the inner tube and the outer tube.
The smoking article having a carbon heat source according to claim 3, wherein the heat insulating layer is disposed between the inner and middle tubes and between the middle and outer tubes.
The smoking article provided with the carbon heat source according to claim 3, wherein the heat insulating layer is disposed between the carbon heat source and the inner tube, and between the inner and middle tubes.
The smoking article provided with a carbon heat source according to claim 2, wherein the heat insulating layer extends from the distal end of the paper pipe to the proximal end.
The smoking article having a carbon heat source according to claim 1, wherein the flavor generating source is disposed adjacent to the carbon heat source.
The smoking article having a carbon heat source according to claim 1, further comprising a filter connected to a proximal end of the paper pipe through a chip paper.