WO2024013782A1 - Wrapper for non-combustion-heated flavor inhalation article - Google Patents

Abstract

A wrapper for a non-combustion-heated flavor inhalation article comprising a base paper that has a basis weight of at least 40 g/m2 and contains not more than 10 wt% of a filler.

Description

Wrapper for non-combustion heated flavor suction products

The present invention relates to a wrapper for a non-combustion heated flavor suction article.

Wrappers made of paper are used in flavor-absorbing articles, and paper provided with various functions has been proposed. For example, Patent Document 1 describes a paper for reducing visible sidestream smoke of combustible cigarettes, which specifically contains 12.6 to 17.4% by weight of filler and 30 to 38.2 g/m ² of paper. A paper having a basis weight is disclosed (Example). Papers have also been proposed to reduce the occurrence of stains in non-combustion heating smoking articles; for example, Patent Document 2 specifically contains 23 to 50% by weight of filler and 23 to 45 g/m2 of ^filler . Patent Document 3 discloses paper having a basis weight of 25 to 40 g/m ² and containing 26 to 32% by weight of filler.

Patent No. 2876070 International Publication No. 2020/008510 International Publication No. 2016/088204

A non-combustion heated flavor suction article generates an aerosol when a tobacco rod is heated. At this time, the wrapping paper or chipping paper of the tobacco rod deteriorates due to heating, and as a result, the non-combustion heated flavor suction article may tear or break, impairing its handling properties. In view of the above circumstances, an object of the present invention is to provide a non-combustion heating type flavor suction article that has excellent handling properties after heating.

The inventors have discovered that a wrapper comprising a base paper containing a specific amount of filler and having a specific basis weight solves the above problem.
Aspect 1
A wrapper for a non-combustion heated flavor suction article, comprising a base paper having a basis weight of 40 g/m ² or more and containing 10% by weight or less of filler.
Aspect 2
The wrapper according to aspect 1, having a tensile strength in the MD direction of 40 N/15 mm or more.
Aspect 3
The wrapper according to aspect 1 or 2, having a tensile strength in the CD direction of 20 N/15 mm or more.
Aspect 4
The wrapper according to any one of aspects 1 to 3, having a thickness of 45 μm or more.
Aspect 5
The wrapper according to any of aspects 1 to 4, which is wrapping paper or tipping paper.
Aspect 6
A non-combustion heated flavor suction article comprising the wrapper according to any one of aspects 1 to 5.
Aspect 7
A non-combustion heated flavor suction article according to aspect 6, comprising a wrapper according to any one of aspects 1 to 5 in the part inserted into the heating device.
Aspect 8
8. The non-combustion heated flavor suction article according to aspect 7, wherein the portion inserted into the heating device includes part or all of the tobacco rod, or a joint between the tobacco rod portion and an adjacent member.

According to the present invention, it is possible to provide a non-combustion heated flavor suction article that has excellent handling properties after heating.

A diagram showing an embodiment of a non-combustible flavor suction article Diagram showing one aspect of a non-combustible flavor suction system Diagram showing an overview of the rupture test

Hereinafter, the present invention will be explained in detail. In the present invention, "X to Y" includes the end values of X and Y.

1. Wrapper (1) Base Paper The wrapper according to this embodiment includes a specific base paper. Base paper is a base material that contains pulp and does not contain a coating layer. The base paper has a basis weight of 40 g/m ² or more and contains 10% by weight or less of filler. A filler is an inorganic filler added to base paper to impart smoothness, whiteness, opacity, etc. to the paper. Fillers include, but are not limited to, calcium carbonate, talc, and clay. Among these, calcium carbonate is preferred from the viewpoint of easy availability.

When the basis weight of the base paper is within the above range, the strength of the wrapper is improved. However, when the basis weight of the base paper is within this range, if the filler content is too large, the wrapper will become brittle. Therefore, the inventors have found that the toughness of the wrapper can be increased by setting the filler content of the base paper to 10% by weight or less. From this viewpoint, the lower limit of the basis weight of the base paper is preferably 42 g/m ² or more, more preferably 43 g/m ² or more, even more preferably 45 g/m ² or more. Although the upper limit of the basis weight is not limited, it is preferably 60 g/m ² or less, more preferably 50 g/m ² or less. The upper limit of the filler content is preferably 7% by weight or less. The lower limit of the filler content is not limited, but is preferably 2% by weight or more.

The base paper may contain a combustion inhibitor such as aluminum hydroxide. The amount of the combustion inhibitor may be a known amount, but is preferably about 1 to 10 g/m ² .

(2) Coating layer A known clear coating layer or pigment coating layer may be provided on the base paper. As the pigment in the pigment coating layer, those known in the paper manufacturing field can be used. Examples include calcium carbonate, titania, clay, and talc. The coating amount per side is preferably 3 g/m ² or more, more preferably 4 g/m ² or more, and even more preferably 5 g/m ² or more. The upper limit of the coating amount is not limited, but is preferably 10 g/m ² or less.

The content of pigment in the coating layer is not limited, but the lower limit is preferably 5% by weight or more. The upper limit is preferably 50% by weight or less. The coating layer contains a known binder and the like in addition to the pigment.

(3) Properties of wrapper 1) Basis weight The basis weight of the wrapper is not limited as long as it is 40 g/m ² or more, but is preferably 45 g/m ² or more, more preferably 50 g/m ² or more. Although the upper limit of the basis weight of the wrapper is not limited, it is preferably 80 g/m ² or less. Basis weight is measured in accordance with JIS P 8124.

2) Ash content Ash content is the amount of ashing residue (% by weight) based on the bone dry weight of the sample, and is an index of the total amount of filler and pigment in the pigment coating layer. The ash content of the wrapper is not limited, but its lower limit is preferably 1% by weight or more, more preferably 3% by weight or more. The upper limit is preferably 10% by weight or less, more preferably 7% by weight or less. Ash content is measured in accordance with JIS P 8252.

3) Tensile strength The tensile strength of the wrapper in the MD direction is preferably 40 N/15 mm or more, more preferably 50 N/15 mm or more, and still more preferably 55 N/15 mm or more. Further, the tensile strength of the wrapper in the CD direction is preferably 20 N/15 mm or more, more preferably 25 N/15 mm or more. Tensile strength is measured in accordance with JIS P8113.

4) Thickness The thickness of the wrapper is not limited, but from the viewpoint of strength, it is preferably 45 μm or more, more preferably 50 μm or more. Although the upper limit of the thickness of the wrapper is not limited, it can be, for example, 70 μm or less. The thickness is measured according to JIS P 8118.

5) Applications The wrapper is useful as a wrapping or tipping paper. The wrapping paper is the paper on which the filling is directly wrapped. Chip paper is paper that is used to wrap and join multiple members. In particular, the wrapper is preferably wrapping paper or tipping paper that wraps around the part of the non-combustion heated flavor suction article that is heated by the heater. Specifically, the wrapper is preferably a wrapping paper for the tobacco rod or a tipping paper for joining the tobacco rod to other members. Other members include, for example, a support member, a cooling member, or a mouthpiece.

2. Non-combustible heated flavor suction article FIG. 1 shows one embodiment of a non-combustible heated flavor suction article. In the figure, 10 is a non-combustible flavor suction article, 1 is a tobacco rod, W is a wrapper, 3 is an adjacent member (preferably a cooling member) adjacent to the tobacco rod, 5 is a mouthpiece, 52 is a filter, and 54 is a center hole. Filter, 7 is chip paper, and V is ventilation. The embodiment shown in FIG. 1 is also referred to as a non-combustion, direct heating flavor suction article because it heats the tobacco material. FIG. 1(1) shows an embodiment in which the wrapper W is a wrapping paper for the tobacco rod 1, and FIG. 1(2) shows an embodiment in which the wrapper W is a tipping paper for wrapping the tobacco rod 1 and the adjacent member 3.

(1) Tobacco Rod A tobacco rod is a substantially cylindrical member for generating flavor components contained in tobacco materials. A tobacco rod includes a tobacco material and a wrapping paper (wrapper) surrounding the tobacco material. The shape of the tobacco material filled in the wrapping paper is not limited, and for example, a sheet, a sheet cut into a width of 0.8 to 1.2 mm, or a cut into a width of 0.8 to 1.2 mm. Examples include engraving. The sheet may be gathered, folded, or spiraled without being cut and filled into a wrapping paper to form a tobacco rod. Alternatively, the sheet may be cut into strips and these may be filled into a wrapping paper concentrically or so that the longitudinal direction of the strips is parallel to the longitudinal direction of the tobacco rod to form a tobacco rod.

The packing density of the tobacco material is not particularly limited, but from the viewpoint of ensuring the characteristics of the non-combustible flavor suction article and imparting good smoking taste, it is usually 250 mg/cm ³ or more, preferably 320 mg/cm ³ or more. . Moreover, the upper limit is usually 800 mg/cm ³ or less, preferably 600 mg/cm ³ or less. Although the length of the tobacco rod 1 is not limited, it is preferably 15 to 25 mm. Although its diameter is not limited, it is preferably 6 to 8 mm.

The tobacco material may generate steam as it is heated. The heating temperature is not limited, but is approximately 250 to 350°C. To promote aerosol generation, an aerosol source such as glycerin, propylene glycol, polyols such as 1,3-butanediol, etc. may be added to the tobacco material. The amount of the aerosol source added is preferably 5 to 50% by weight, more preferably 10 to 30% by weight, based on the dry weight of the tobacco material. In addition, known fragrances and the like may be added to the tobacco material.

(2) Adjacent member The adjacent member 3 is a member adjacent to the tobacco rod 1 on the downstream side. Downstream refers to the direction toward the mouth end. Examples of the adjacent member include a cooling member for cooling the aerosol, a support member for increasing the strength of the entire article, or a mouthpiece described below. Preferably, the adjacent member 3 is a cooling member.

The cooling member is a member for cooling the flavor components and vapor generated by the tobacco rod 1 to promote aerosolization. The cooling member may be a hollow paper tube. Preferably, the paper tube is made of cardboard, which is more rigid than wrapping paper or chipping paper. The paper tube may be provided with ventilation V (holes). It is preferable that a plurality of ventilations be provided along the circumference of the paper tube. Further, the cooling member may be filled with gathered sheets to increase heat exchange efficiency. The dimensions of the cooling member are not limited, but the length is preferably 15 to 25 mm, and the diameter is preferably 5.5 to 7.5 mm.

(3) Mouthpiece The mouthpiece is a member that constitutes the mouthpiece end. In one embodiment, the mouthpiece 5 includes a filter 52 and a center hole filter 54. As the filter 52 and the center hole filter 54, known filters can be used.

2. Non-combustion heated flavor suction system The combination of a non-combustion heated flavor suction article and a heating device is also referred to as a non-combustion heated flavor suction system. FIG. 2 shows one aspect of the system. In the figure, 100 is a non-combustion type flavor suction system, 10 is a non-combustion type flavor suction device, and 30 is a heating device including a heater. The heating device includes a heater, a housing, a power source, and the like.

The heating device 30 includes a body H1, a heater H2, a metal tube H3, a battery unit H4, and a control unit H5. The body H1 has a cylindrical recess H6, and a heater H2 and a metal tube H3 are arranged at positions corresponding to the tobacco rod 1 inserted into the recess H6. The heater H3 can be an electric resistance heater, and electric power is supplied from the battery unit H4 according to an instruction from the control unit H5 that performs temperature control to heat the heater H2. Heat emitted from the heater H2 is transmitted to the tobacco rod 1 through a metal tube H3 with high thermal conductivity. In the figure, the heating device 10 heats the tobacco rod 1 from the outside, but it may also heat the tobacco rod 1 from the inside. The heating temperature by the heating device 10 is not particularly limited, but is preferably 400°C or lower, more preferably 150 to 400°C, and even more preferably 200 to 350°C. The heating temperature refers to the temperature of the heater of the heating device 10.

It is preferable that the portion of the non-combustion heated flavor suction article that is inserted into the heating device 10 includes a part or all of the tobacco rod 1 or a joint between the tobacco rod 1 and the adjacent member 3. In this case, it is preferable that the non-combustion heating type flavor suction article includes the wrapper W according to this embodiment in the portion inserted into the heating device 10.

[Examples 1 to 3, Comparative Examples 1 to 6]
Wrappers shown in Table 1 were prepared. Calcium carbonate and kaolin clay were used as fillers, and aluminum hydroxide was used as a pigment.

 

Each test was conducted in accordance with the following.
Basis weight: JIS P 8124
Thickness: JIS P 8118
Tensile strength and elongation: JIS P8113
Breathability: CORESTA RECOMMENDED METHOD ^No. 40
Opacity: JIS P8149
Whiteness: JIS P8148
Diffusion coefficient: CORESTA RECOMMENDED METHOD ^No. 77

A paper tube with a length of 15 mm and a paper tube with a length of 45 mm were prepared, and both were arranged so that their end surfaces were in contact with each other. A test piece was prepared by wrapping the area including the joint part with the wrapper listed in Table 1 and joining the two paper tubes. This test piece was inserted into the heating device shown in FIG. 2, and the test piece was heated at 295° C. for 5 minutes. At this time, the joint portion was heated.

The test piece after heating was cooled to room temperature and subjected to a breaking test. An outline of the test is shown in Figure 3. In the figure, P is a plunger, B is a pedestal, and J is a joint. Table 1 shows the load at break. In this test, the characteristics of the wrapper could be accurately evaluated because it was not affected by the strength of the paper tube. As a result, it was revealed that the wrapper of the example had better strength after heating than the wrapper of the comparative example.

This test piece is a model of the non-combustion heated flavor suction article shown in Figure 1. Therefore, similar results can be obtained when a non-combustion heated flavor suction article including the wrapper is manufactured and tested.

1 Tobacco rod 3 Adjacent member, cooling member 5 Mouthpiece 52 Filter 54 Center hole filter 7 Chip paper V Ventilation W Wrapper
10 Non-combustible flavor suction article 30 Heating device 100 Non-combustible flavor suction system
H1 Body H2 Heater H3 Metal tube H4 Battery unit H5 Control unit H6 Recess H7 Ventilation hole
P plunger B pedestal J joint PT paper tube

Claims (8)

A wrapper for a non-combustion heated flavor suction article, comprising a base paper having a basis weight of 40 g/m ² or more and containing 10% by weight or less of filler. The wrapper according to claim 1, having a tensile strength in the MD direction of 40 N/15 mm or more. The wrapper according to claim 1 or 2, having a tensile strength in the CD direction of 20 N/15 mm or more. The wrapper according to any one of claims 1 to 3, having a thickness of 45 μm or more. The wrapper according to any one of claims 1 to 4, which is wrapping paper or chipping paper. A non-combustion heated flavor suction article comprising the wrapper according to any one of claims 1 to 5. The non-combustion heated flavor suction article according to claim 6, comprising the wrapper according to any one of claims 1 to 5 in a portion inserted into a heating device. The non-combustion heated flavor suction article according to claim 7, wherein the portion inserted into the heating device includes a part or all of the tobacco rod, or a joint between the tobacco rod portion and an adjacent member.