CN118401127A - Non-combustion heating type cigarette rod - Google Patents

Abstract

A non-combustion heating type tobacco rod (1) is provided with: the aerosol generating device comprises a base material part (10) comprising an aerosol source (11), a cooling part (20) for cooling vapor generated by heating the base material part (10) to generate aerosol, and a filter part (30) arranged at a part through which the aerosol passes, wherein at least any one of the base material part (10), the cooling part (20) and the filter part (30) comprises a porous adsorbent.

Description

Non-combustion heating type cigarette rod

Technical Field

The invention relates to a non-combustion heating type cigarette rod.

Background technique

Patent document 1 describes a mouthpiece for a smoking article, which comprises a porous carbon material, wherein the porous carbon material has a BET surface area of at least 800 m ² /g, has a pore structure including mesopores and micropores, and has a pore volume measured by a nitrogen adsorption method of at least 0.9 cm ³ /g, a) the porous carbon material has a bulk density of 0.5 g/cc or less, and/or b) 15 to 65% of the pore volume of the porous carbon material measured by a nitrogen adsorption method is mesopores.

In addition, Patent Document 2 describes a smoking article comprising: a smokable material, and an activated carbon material located downstream of the smokable material, wherein the activated carbon material has a ratio of fine micropore volume to total micropore volume of approximately 0.9 or less, and the activated carbon material contains surface oxygen at a concentration of approximately 5000 micromoles/gram or less as determined by a temperature rise desorption method.

It should be noted that, although porous carbon materials and activated carbon materials are used in Patent Documents 1 and 2, the specific descriptions and examples all describe combustion tobacco.

Prior art literature

Patent Literature

Patent Document 1: Japanese Patent Application No. 2008-535754

Patent Document 2: Japanese Patent Application No. 2017-510266

Summary of the invention

Problem to be solved by the invention

Compared with burning tobacco, the heating temperature of the substrate of the non-combustion heating type cigarette rod, which generates aerosol by heating the substrate containing the aerosol source, is lower, so the influence of flavor-blocking components such as aldehydes has not been studied. However, it is difficult to reproduce the flavor of tobacco at a low heating temperature, and in order to improve the user's flavor satisfaction, the heating temperature must be increased.

The purpose of the present invention is to maintain the user's smoking satisfaction in a non-combustion heating type cigarette rod with a high heating temperature and remove components that hinder the flavor and aroma of smoking, such as aldehydes.

way of solving the problem

The first feature of the present invention accomplished based on the above-mentioned purpose is a non-combustion heating type cigarette rod, which comprises: a substrate portion including an aerosol source, a cooling portion for cooling the vapor generated by heating the above-mentioned substrate portion to generate an aerosol, and a filter portion arranged at a location through which the above-mentioned aerosol passes, and at least any one of the above-mentioned substrate portion, the above-mentioned cooling portion, and the above-mentioned filter portion contains a porous adsorbent.

The second feature is that the porous adsorbent may be activated carbon.

The third feature is that the ratio of the volume of pores having pore diameters of 50 nm to 5000 nm of the activated carbon to the total volume of pores having pore diameters of 5000 nm or less may be 15% or more.

The fourth feature is that the activated carbon may have a pore volume of 0.2 cm ³ /g to 0.9 cm ³ /g for pores with a diameter of 50 nm to 5000 nm.

The fifth feature is that the ratio of the volume of pores having pore diameters less than 2 nm to the total volume of pores having pore diameters of 5000 nm or less in the activated carbon may be 70% or less.

A sixth feature is that the activated carbon may have a BET specific surface area of 600 m ² /g or more and 1800 m ² /g or less.

The seventh feature is that the porous adsorbent can be arranged at a location in the cigarette rod that contacts the aerosol.

The eighth feature is that the porous adsorbent may be present in any one or more of the following 1) to 5):

1) Inside the filter of the above filter part,

2) In the paper layer of the winding paper for winding the filter tip or on the surface opposite to the filter tip,

3) In the hollow part of the filter part,

4) The surface facing the hollow portion,

5) The filter has a plurality of sections and cavities are formed between the sections.

The ninth feature may be a non-combustion heating type cigarette rod, which comprises: a substrate portion including an aerosol source, and a filter portion arranged at a position through which aerosol generated by heating the substrate portion passes, wherein at least any one of the substrate portion and the filter portion contains activated carbon having a pore volume with a pore diameter of 50 nm or more and 5000 nm or less relative to a total pore volume with a pore diameter of 5000 nm or less, the ratio of which is 15% or more.

Effects of the Invention

According to the first feature, a non-combustion heating type cigarette rod can be provided which improves the user's smoking satisfaction and preferentially removes components that hinder the flavor and aroma of the cigarette, such as aldehydes.

According to the second feature, a non-combustion heating type cigarette rod can be provided that can selectively reduce flavor and aroma hindering components such as aldehydes, compared with the case of using a porous adsorbent other than activated carbon.

According to the third feature, a non-combustion heating type cigarette rod can be provided which has a high affinity with aerosol and can have a good effect on the aroma and taste of the smoke, compared with the case of using activated carbon in which the ratio of the pore volume with a pore diameter of more than 50nm and less than 5000nm to the total pore volume with a pore diameter of less than 5000nm is less than 15%.

According to the fourth feature, a non-combustion heating type cigarette rod having high affinity with aerosol and good effect on the flavor and taste can be provided compared with the case of using activated carbon with a pore diameter of 50 nm to 5000 nm and a pore volume of less than 0.2 cm ³ /g or more than 0.9 cm ³ /g.

According to the fifth feature, a non-combustion heating type cigarette rod can be provided that can selectively reduce flavor and aroma hindering components such as aldehydes, compared with the case of using activated carbon in which the ratio of the pore volume with a pore diameter less than 2 nm to the total pore volume with a pore diameter of less than 5000 nm is greater than 70%.

According to the sixth feature, a non-combustion heating type cigarette rod can be provided which can selectively reduce flavor and aroma inhibiting components such as aldehydes, compared with the case of using activated carbon having a BET specific surface area of less than 600 m ² /g or more than 1800 m ² /g.

According to the seventh feature, a non-combustion heating type cigarette rod can be provided that can selectively reduce flavor and aroma hindering components such as aldehydes, compared with the case where a porous adsorbent is arranged in a portion of the cigarette rod that does not come into contact with the aerosol.

According to the eighth feature, a non-combustion heating type cigarette rod can be provided that can selectively reduce flavor and aroma hindering components such as aldehydes, compared with a case where a porous adsorbent is not used.

According to the ninth feature, a non-combustion heating type cigarette rod can be provided in which the user's smoking satisfaction is maintained and in which components that hinder the smoking flavor, such as aldehydes, are preferentially removed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a diagram showing a longitudinal section of a non-combustion heating type cigarette rod according to a first embodiment.

FIG. 2 is a schematic diagram schematically showing a configuration example of the suction device according to the first embodiment.

FIG. 3 is a schematic diagram showing a longitudinal cross section of a filter portion of a non-combustion heating-type cigarette rod according to another embodiment.

Symbol Description

1···Non-combustion heating type cigarette rod, 10···Base material part, 11···Aerosol source, 20···Cooling part, 30···Filter part, 31···Filter, 33···Filling layer, 35···Center hole part, 37···Cavity, 40···Tipping paper

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In each of the drawings, the same parts are denoted by the same reference numerals.

＜Non-combustion heating type cigarette holder＞

Fig. 1 is a diagram showing a longitudinal section of a non-combustion heating type cigarette rod 1 according to a first embodiment. Fig. 2 is a schematic diagram schematically showing a configuration example of a smoking device 100 according to a first embodiment.

The non-combustion heating type cigarette rod (hereinafter, sometimes referred to as "cigarette rod") 1 of the first embodiment includes a substrate portion 10, a cooling portion 20 and a filter portion 30. The substrate portion 10 is formed in a cylindrical shape. Hereinafter, the direction of the center line CL of the substrate portion 10 is sometimes referred to as the "center line direction". The cigarette rod 1 further includes a tipping paper 40, which is integrated by winding the substrate portion 10, the cooling portion 20, and the filter portion 30 in a state where they are arranged in sequence in the center line direction. Hereinafter, one end side in the center line direction (the left side in FIG. 1) is sometimes referred to as the first side, and the other end side in the center line direction (the right side in FIG. 1) is sometimes referred to as the second side. The first side is the end side inserted into the suction device 100. The second side is the opposite side of the first side, and is the end side that the user holds with his mouth for inhalation. In addition, the cross section along the center line direction is referred to as a "longitudinal cross section", and the cross section cut on a plane orthogonal to the center line direction is defined as a "cross section".

[How to use the cigarette holder 1]

The cigarette rod 1 of the first embodiment is used for a non-combustion heating type smoking device 100. As shown in FIG. 2, the smoking device 100 includes: a power supply unit 111 for storing power and supplying power to each component of the smoking device 100, a sensor unit 112 for detecting various information related to the smoking device 100, and a notification unit 113 for notifying the user of the information. In addition, the smoking device 100 includes: a storage unit 114 for storing various information used for the operation of the smoking device 100, a communication unit 115 for sending and receiving information between the smoking device 100 and other devices, and a control unit 116 for controlling all operations in the smoking device 100. In addition, the smoking device 100 includes: a heating unit 121 for heating the cigarette rod 1, a holding unit 140 for holding the cigarette rod 1, an opening 142 for connecting the internal space 141 to the outside, and a heat insulating unit 144 for preventing heat transfer from the heating unit 121 to other components of the smoking device 100. In the smoking device 100 , the user takes a puff while the cigarette rod 1 is held by the holding portion 140 .

The heating unit 121 heats the base material portion 10 of the cigarette rod 1. The heating unit 121 is made of any raw material such as metal or polyimide. For example, the heating unit 121 is formed in a film shape and is arranged in a manner covering the outer periphery of the holding unit 140. Moreover, when the heating unit 121 generates heat, the aerosol source 11 (omitted in FIG. 2 ) contained in the cigarette rod 1 is heated from the outer periphery of the cigarette rod 1. When power is supplied from the power supply unit 111, the heating unit 121 generates heat. As an example, power may be supplied when a given user input is detected by the sensor unit 112. When the temperature of the cigarette rod 1 heated by the heating unit 121 reaches a given temperature, the user can inhale. Then, when a given user input is detected by the sensor unit 112, power supply may be stopped. As an example of another usage, power may be supplied to generate aerosol during the period when the sensor unit 112 detects that the user has inhaled.

The heat insulating portion 144 is configured to cover at least the outer periphery of the heating portion 121. For example, the heat insulating portion 144 is composed of a vacuum insulation material and an aerosol insulation material. It should be noted that the vacuum insulation material refers to an insulation material that is made to be close to zero by wrapping, for example, glass wool and silicon dioxide (silicon powder) with a resin film and making it a high vacuum state.

[Base material portion 10]

The substrate portion 10 has: an aerosol source 11 that generates vapor that can generate an aerosol by being heated, and a rolling paper 12 that covers the periphery of the aerosol source 11. The substrate portion 10 of Figure 1 is an example of a substrate portion that includes an aerosol source. The substrate portion 10 is formed into a cylindrical shape by winding the aerosol source 11 with the rolling paper 12. The aerosol source 11 can be, for example, an aerosol source of tobacco origin such as a processed product obtained by molding tobacco shreds or tobacco raw materials into granular, sheet-like or powdered forms. In addition, the aerosol source 11 can also include an aerosol source of non-tobacco origin made from plants other than tobacco (such as mint, herbs, etc.). As an example, the aerosol source 11 can include flavor ingredients such as menthol. In the case where the suction device 100 is a medical inhaler, the aerosol source 11 can include a medicament for the patient to inhale. It should be noted that the aerosol source 11 is not limited to a solid, and can be, for example, a polyol such as glycerin and propylene glycol, and a liquid such as water. When the cigarette rod 1 is held in the holding portion 140 shown in FIG. 2 , at least a portion of the base portion 10 is accommodated in the internal space 141 of the holding portion 140 .

The base member 10 formed by winding the aerosol source 11 with the wrapping paper 12 preferably has a cylindrical shape satisfying the aspect ratio defined by Mathematical Formula 1 of 1 or more.

[Mathematical formula 1]

Aspect ratio = h/w

In mathematical formula 1, w is the width of the cross section of the substrate portion 10, and h is the size of the center line direction of the substrate portion 10, preferably h≥w. The shape of the cross section is not limited, and can be a polygon, a rounded polygon, a circle, an ellipse, etc. For the width w, when the cross section is a circle, it is the diameter, when the cross section is an ellipse, it is the major diameter, and when the cross section is a polygon or a rounded polygon, it is the diameter of the circumscribed circle or the major diameter of the circumscribed ellipse. The width of the aerosol source 11 constituting the substrate portion 10 is preferably greater than 4 mm and less than 9 mm.

The size of the centerline direction of the base material part 10 can be appropriately changed according to the size of the product, and is usually 10 mm or more, preferably 12 mm or more, more preferably 15 mm or more, and further preferably 18 mm or more. In addition, the size of the centerline direction of the base material part 10 is usually 70 mm or less, preferably 50 mm or less, more preferably 30 mm or less, and further preferably 25 mm or less.

In addition, in the centerline direction, the ratio of the size of the substrate portion 10 to the size of the cigarette rod 1 is not particularly limited, and is generally 10% or more, preferably 20% or more, more preferably 25% or more, and further preferably 30% or more from the viewpoint of the balance between the transfer amount and the aerosol temperature. In addition, the ratio of the size of the substrate portion 10 to the size of the cigarette rod 1 is generally 80% or less, preferably 70% or less, more preferably 60% or less, further preferably 50% or less, particularly preferably 45% or less, and most preferably 40% or less.

The content of the aerosol source 11 in the substrate 10 is not particularly limited, and may be 200 mg to 800 mg, preferably 250 mg to 600 mg. This range is particularly suitable for a substrate 10 having a circumference of 22 mm and a size of 20 mm in the centerline direction.

Here, the aerosol source 11 containing tobacco shreds is described. The material of the tobacco shreds contained in the aerosol source 11 is not particularly limited, and known materials such as leaves and stems can be used. In addition, the dried tobacco leaves can be crushed to an average particle size of 20 μm or more and 200 μm or less to make a tobacco pulverized material, which is homogenized and processed into sheets, and the sheets thus obtained (hereinafter, also referred to as "homogenized sheets") are cut into pieces. In addition, it can be a so-called string material type in which a homogenized sheet having a size substantially the same as that in the direction of the center line of the substrate 10 is cut substantially horizontally to the direction of the center line of the substrate 10 and then filled into the aerosol source 11.

In addition, the width of the shredded tobacco when filled in the aerosol source 11 is preferably 0.5 mm or more and 2.0 mm or less.

Regarding the tobacco leaves used for making tobacco shreds and homogenized sheets, the tobacco species used can use various species. For example, yellow species, burley tobacco species, oriental tobacco species, local species (in the future species), other safflower tobacco (Nicotiana tabacum) species, yellow tobacco (Nicotiana rustica) species and their mixtures can be cited. Regarding the mixture, each species can be appropriately blended and used in a way that reaches the target taste. The details of the tobacco species are disclosed in "Tobacco Encyclopedia, Tobacco Comprehensive Research Center, 2009.3.31". There are multiple existing methods for the manufacture of homogenized sheets, that is, the method of crushing tobacco leaves and processing them into homogenized sheets. The first is a method for making paper sheets using papermaking technology. The second is to mix appropriate solvents such as water in the crushed tobacco leaves and homogenize them, and then thinly cast the homogenized material on a metal plate or a metal plate belt, dry it and make a method for making a cast sheet. The third is to mix appropriate solvents such as water in the crushed tobacco leaves and homogenize them and extrude them into sheets to make a calendered sheet. The types of homogenized sheets are disclosed in detail in "Tobacco Encyclopedia, Tobacco Comprehensive Research Center, 2009.3.31".

The water content of the aerosol source 11 is 10% to 15% by mass, preferably 11% to 13% by mass, relative to the total amount of the aerosol source 11. At such a water content, the generation of winding stains can be suppressed, and the winding adaptability during the manufacture of the substrate 10 is improved.

The aerosol source 11 is not particularly limited and may include extracts and/or components derived from various natural products according to the application. Examples of the extracts and/or components include glycerol, propylene glycol, triacetin, 1,3-butylene glycol, and mixtures thereof.

The content of the extract and/or these components in the aerosol source 11 is not particularly limited, but is generally 5% by mass or more, preferably 10% by mass or more, relative to the total amount of the aerosol source 11, from the viewpoint of sufficiently generating the aerosol and imparting a good flavor. In addition, the content of the extract and/or these components in the aerosol source 11 is generally 50% by mass or less, preferably 15% by mass or more and 25% by mass or less.

The aerosol source 11 may contain a fragrance. The type of fragrance is not particularly limited, but menthol is particularly preferred from the viewpoint of imparting a good fragrance. In addition, these fragrances may be used alone or in combination of two or more.

The filling density of the aerosol source 11 is not particularly limited, but is generally 250 mg/cm ³ or more, preferably 300 mg/cm ³ or more, from the perspective of ensuring the performance of the cigarette rod 1 and imparting a good flavor. In addition, the filling density of the aerosol source 11 is generally 400 mg/cm ³ or less, preferably 350 mg/cm ³ or less.

In addition, the aerosol source 11 may be composed of tobacco sheets. The number of tobacco sheets may be one sheet or two or more sheets.

As a method in which the aerosol source 11 is composed of a single tobacco sheet, for example, a method in which a tobacco sheet having one side having the same size as the center line direction of the filled object is folded multiple times horizontally to the center line direction of the filled object (so-called pleated sheet) is filled. In addition, a method in which a tobacco sheet having one side having the same size as the center line direction of the filled object is rolled in a direction perpendicular to the center line direction of the filled object is filled.

As a method in which the aerosol source 11 is composed of more than two tobacco sheets, for example, a method can be cited in which a plurality of tobacco sheets each having one side having the same size as that in the direction of the center line of the filled object are arranged in a concentric manner and filled in a state in which the sheets are rolled in a direction perpendicular to the direction of the center line of the filled object.

"Arranged concentrically" means that the centers of all tobacco sheets are located at substantially the same position. In addition, the number of tobacco sheets is not particularly limited, and examples thereof include 2, 3, 4, 5, 6 or 7 sheets.

The two or more tobacco sheets may all have the same composition or physical properties, or a part or all of the tobacco sheets may have different compositions or physical properties. In addition, the thickness of each tobacco sheet may be the same or different.

The thickness of each tobacco sheet is not limited, but is preferably 150 μm or more and 1000 μm or less, and more preferably 200 μm or more and 600 μm or less, in consideration of the balance between heat transfer efficiency and strength.

The aerosol source 11 can be produced by preparing a plurality of tobacco sheets having different widths, preparing a stacked body in which the sheets are stacked so that the width decreases from the first side to the second side, passing the stacked body through a rolling tube, and rolling the stacked body.

According to this manufacturing method, the plurality of tobacco sheets extend in the center line direction and are arranged concentrically around the center line CL.

In this manufacturing method, it is preferred to prepare the laminate in a manner that a non-contact portion is formed between adjacent tobacco sheets after winding and forming. When there is a non-contact portion (gap) between multiple tobacco sheets where the tobacco sheets do not contact, the aroma flow path can be ensured and the transfer efficiency of the aroma component can be improved. On the other hand, the heat from the heater can be transferred to the tobacco sheets on the outside via the contact portions of the multiple tobacco sheets, so that a high heat transfer efficiency can be ensured.

In order to provide non-contact portions between a plurality of tobacco sheets where the tobacco sheets do not contact each other, for example, there can be mentioned: a method of using embossed tobacco sheets, a method of laminating adjacent tobacco sheets without bonding their entire surfaces to each other, a method of laminating adjacent tobacco sheets by bonding a portion of each other, or a method of preparing a laminate by lightly bonding the entire surfaces or a portion of adjacent tobacco sheets to each other in a peelable manner after rolling and molding.

When preparing the base member 10 including the roll paper 12 , the roll paper 12 may be disposed on the end surface on the first side of the laminate.

Glycerin, propylene glycol, 1,3-butylene glycol and other polyols may be added to the tobacco sheet. The amount added to the tobacco sheet is preferably 5% to 50% by mass, more preferably 15% to 25% by mass, based on the dry mass of the tobacco sheet.

The tobacco sheet can be appropriately produced by known methods such as papermaking, slurrying, and calendering. In addition, the above-mentioned homogenized sheet can also be used.

In the case of papermaking, it can be manufactured by a method including the following steps. 1) Dry tobacco leaves are coarsely pulverized, extracted with water, and separated into a water extract and a residue. 2) The water extract is dried under reduced pressure and concentrated. 3) Pulp is added to the residue, and after fiberization with a pulper, papermaking is performed. 4) The concentrated solution of the water extract is added to the sheet made by papermaking and dried to make tobacco sheets. In this case, a step of removing some components such as nitrosamines can be added (refer to Japanese Patent Publication No. 2004-510422).

In the case of the slurry method, it can be produced by a method including the following steps. 1) Mixing water, pulp and a binder with crushed tobacco leaves. 2) Thinly stretching (casting) the mixture and drying. In this case, a step of removing some components such as nitrosamines by irradiating the slurry obtained by mixing water, pulp and a binder with crushed tobacco leaves with ultraviolet rays or X-rays can be added.

In addition, as described in International Publication No. 2014/104078, a non-woven fabric-like tobacco sheet can also be used, which is produced by a method including the following steps: 1) mixing tobacco leaves in powder form with a binder; 2) sandwiching the mixture with non-woven fabrics; and 3) forming the laminate into a certain shape by hot melt bonding to obtain a non-woven fabric-like tobacco sheet.

The types of tobacco leaves used as the raw material in each of the above-mentioned methods can be the same as the types of tobacco leaves described in the aerosol source 11 including shredded tobacco.

The composition of the tobacco sheet is not particularly limited. For example, the content of tobacco raw material (tobacco leaf) is preferably 50% by mass or more and 95% by mass or less relative to the total mass of the tobacco sheet. In addition, the tobacco sheet may contain a binder. Examples of the binder include guar gum, xanthan gum, carboxymethyl cellulose, sodium salt of carboxymethyl cellulose, etc. The amount of the binder is preferably 1% by mass or more and 10% by mass or less relative to the total mass of the tobacco sheet. The tobacco sheet may further contain other additives. Examples of additives include fillers such as pulp.

The composition of the paper 12 used for the base material 10 is not particularly limited, and can be a general one, for example, a composition with pulp as the main component. The pulp may be made by mixing and manufacturing non-wood pulps generally used for paper 12 for tobacco products, such as flax pulp, hemp pulp, sisal pulp, and Spanish grass, in addition to wood pulp such as conifer pulp and broadleaf pulp.

As the type of pulp, chemical pulp obtained by sulfate cooking, acid/neutral/alkaline sulfite cooking, alkaline cooking, etc., ground pulp, chemical ground pulp, thermomechanical pulp, etc. can be used.

In the papermaking process using pulp and utilizing a Fourdrinier papermaking machine, a cylinder papermaking machine, a cylinder-short composite papermaking machine, etc., the texture is evened to manufacture the paper roll 12. It should be noted that, as required, a wet paper strength enhancer may be added to impart water resistance to the paper roll 12, or a sizing agent may be added to adjust the printing condition of the paper roll 12. In addition, internal additives for papermaking such as aluminum sulfate, various anionic, cationic, nonionic or amphoteric yield enhancers, filterability enhancers and paper strength enhancers, as well as papermaking additives such as dyes, pH adjusters, defoamers, pitch control agents and slime control agents may be added.

The basis weight of the base paper of the wrapping paper 12 is, for example, usually 20 gsm or more, preferably 25 gsm or more, while the basis weight is usually 65 gsm or less, preferably 50 gsm or less, and more preferably 45 gsm or less.

The thickness of the roll paper 12 is not particularly limited, but is generally 10 μm or more, preferably 20 μm or more, and more preferably 30 μm or more from the viewpoint of rigidity, air permeability, and ease of adjustment during papermaking. In addition, the thickness of the roll paper 12 is generally 100 μm or less, preferably 75 μm or less, and more preferably 50 μm or less.

The shape of the roll paper 12 used to make the base member 10 may be square or rectangular.

When used as a roll of paper 12 for wrapping the aerosol source 11, the length of one side may be about 12 mm to about 70 mm, the length of the other side may be about 15 mm to about 28 mm, the preferred length of the other side may be about 22 mm to about 24 mm, and the further preferred length may be about 23 mm. When the aerosol source 11 is wrapped in a cylindrical shape with the roll of paper 12, for example, the end of the roll of paper 12 overlaps the end of the roll of paper 12 on the opposite side by about 2 mm in the circumferential direction and is glued together, thereby forming a cylindrical paper tube shape filled with the aerosol source 11. The size of the rectangular roll of paper 12 can be determined according to the size of the substrate 10.

In addition to the above-mentioned pulp, fillers may be contained in the wrapping paper 12. The content of the filler relative to the total mass of the wrapping paper 12 is 10 mass % or more and less than 60 mass %, and preferably 15 mass % or more and 45 mass % or less.

In the preferred range of basis weight of the wrapping paper 12 (25 gsm to 45 gsm), the filler content is preferably 15% by mass to 45% by mass.

When the weight per unit area is 25 gsm to 35 gsm, the filler is preferably 15% to 45% by mass, and when the weight per unit area is 35 gsm to 45 gsm, the filler is preferably 25% to 45% by mass.

As the filler, calcium carbonate, titanium dioxide, kaolin and the like can be used, and calcium carbonate is preferably used from the viewpoint of improving flavor and whiteness.

In addition to base paper and fillers, various additives may be added to the roll paper 12. For example, a water resistance enhancer may be added to improve water resistance. The water resistance enhancer may include a wet paper strength enhancer (WS agent) and a sizing agent. Examples of wet paper strength enhancers include urea-formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. In addition, examples of sizing agents include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol having a saponification degree of 90% or more.

As an auxiliary agent, a paper strength enhancer may be added, for example, polyacrylamide, cationic starch, oxidized starch, CMC, polyamide epichlorohydrin resin, polyvinyl alcohol, etc. In particular, it is known that oxidized starch can improve air permeability by using a very small amount (Japanese Patent Application Laid-Open No. 2017-218699).

For the roll paper 12, a coating agent may be added to at least one of the two surfaces, the front and the back. The coating agent is not particularly limited, but preferably a coating agent that can form a film on the surface of the paper to reduce the permeability of the liquid. For example, polysaccharides such as alginic acid and its salts (such as sodium salt), pectin, cellulose derivatives such as ethyl cellulose, methyl cellulose, carboxymethyl cellulose, and nitrocellulose, starch, and its derivatives (such as ether derivatives such as carboxymethyl starch, hydroxyalkyl starch, and cationic starch, ester derivatives such as acetic starch, phosphate starch, and octenyl succinic acid starch) can be cited.

[Cooling unit 20]

The cooling unit 20 is a member formed by placing and winding a plugging paper 21 adjacent to the base unit 10 and the filter unit 30 so as to have a hollow (hollow) cross section such as a cylinder.

The size of the center line direction of the cooling unit 20 can be appropriately changed according to the size of the product, and is usually 5 mm or more, preferably 10 mm or more, and more preferably 15 mm or more. In addition, the size of the center line direction of the cooling unit 20 is usually 35 mm or less, preferably 30 mm or less, and more preferably 25 mm or less. By setting the size of the center line direction of the cooling unit 20 to be above the lower limit, a sufficient cooling effect can be ensured and a good fragrance can be obtained. By setting it to be below the upper limit, the loss caused by the generated steam and aerosol adhering to the molding paper 21 can be suppressed.

It is desirable that the surface area of the inner side of the cooling portion 20 is large. The forming paper 21 formed into the cooling portion 20 may be formed by a sheet of thin material that is wrinkled to form a channel and then pleated, gathered, and folded. If there are many folds or wrinkles within a given volume of the element, the total surface area of the cooling portion 20 becomes larger.

The thickness of the shaping paper 21 is not particularly limited, and may be, for example, 5 μm or more and 500 μm or less, or 10 μm or more and 250 μm or less. It should be noted that the material of the shaping paper 21 is not particularly limited, and may be, for example, a material mainly composed of pulp, or a material mainly composed of any one of polyethylene, polypropylene, polyvinyl chloride, polyethylene terephthalate, polylactic acid, cellulose acetate, and aluminum foil, or any combination thereof.

Openings V (also referred to as "ventilation filters (Vf)" in the technical field) are concentrically provided in the circumferential direction of the cooling portion 20. The openings V exist in a region where air can flow in from the outside of the cigarette rod 1, in other words, in a region protruding from the opening 142 in a state where the cigarette rod 1 is held by the holding portion 140 of the inhalation device 100.

The opening V allows air to flow from the outside into the cooling unit 20 during inhalation, thereby reducing the temperature of the steam and air flowing in from the base material 10. Furthermore, by setting the cooling unit 20 to a position within a region of 4 mm or more in the lateral direction of the cooling unit 20 from the boundary between the cooling unit 20 and the filter unit 30, not only the cooling capacity can be improved, but also the retention of substances (products) generated by heating in the cooling unit 20 can be suppressed, thereby increasing the transfer amount of the products.

It should be noted that the vapor that generates aerosol as condensation nuclei by heating the substrate 10 contacts the air from the outside, and the temperature is lowered, thereby liquefying, which can promote the generation of aerosol. The cooling unit 20 is an example of a cooling unit that cools the vapor generated by heating the substrate to generate aerosol.

In the cooling section 20, when the openings V existing in the form of concentric circles are treated as one opening group, the opening group may be one, or may be two or more. When there are two or more opening groups, it is preferred that no opening group is provided in a region less than 4 mm from the boundary between the cooling section 20 and the filter section 30 in the cooling section 20 side direction from the viewpoint of increasing the transfer amount of the component generated by heating.

In addition, when the cigarette rod 1 is a form in which the base material part 10, the cooling part 20 and the filter part 30 are wrapped by the tipping paper 40, it is preferable to provide an opening in the tipping paper 40 at a position directly above the opening V provided in the cooling part 20. When such a cigarette rod 1 is manufactured, the tipping paper 40 provided with an opening overlapping with the opening V can be prepared for wrapping. From the viewpoint of ease of manufacturing, it is preferable to open a hole that penetrates both the cooling part 20 and the tipping paper 40 after manufacturing the cigarette rod 1 without the opening V.

From the viewpoint of improving the transfer of the product by heating, the region where the openings V exist is not particularly limited as long as it is a region of 4 mm or more from the boundary between the cooling portion 20 and the filter portion 30 in the direction of the cooling portion 20 side. From the viewpoint of further improving the transfer of the product, it is preferably a region of 4.5 mm or more, more preferably a region of 5 mm or more, and even more preferably a region of 5.5 mm or more. In addition, from the viewpoint of ensuring the cooling function, the region where the openings V exist is preferably a region of 15 mm or less, more preferably a region of 10 mm or less, and even more preferably a region of 7 mm or less.

From the perspective of improving the transfer of heated products, the region where the opening V exists is preferably a region of 24 mm or more from the end surface of the first side of the cigarette rod 1 in the direction of the cooling portion 20, preferably a region of 24.5 mm or more, preferably a region of 25 mm or more, and more preferably a region of 25.5 mm or more. In addition, from the perspective of ensuring the cooling function, the region where the opening V exists is preferably a region of 35 mm or less, more preferably a region of 30 mm or less, and further preferably a region of 27 mm or less.

In addition, considering that the size of the center line direction of the cooling portion 20 is 20 mm or more based on the boundary between the cooling portion 20 and the base portion 10, from the viewpoint of ensuring the cooling function, the region where the opening V exists is preferably a region of 5 mm or more from the boundary between the cooling portion 20 and the base portion 10 in the direction of the cooling portion 20 side, more preferably a region of 10 mm or more, and further preferably a region of 13 mm or more. In addition, from the viewpoint of improving the transfer of the product based on heating, the region where the opening V exists is preferably a region of 16 mm or less from the boundary between the cooling portion 20 and the base portion 10 in the direction of the cooling portion 20 side, more preferably a region of 15.5 mm or less, further preferably a region of 15 mm or less, and particularly preferably a region of 14.5 mm or less.

The openings V are provided so that the air inflow ratio from the openings V is 10% by volume or more and 90% by volume or less when the automatic smoking machine is used to draw air at 17.5 ml/sec. The "air inflow ratio" is the volume ratio of the air flowing in from the openings V when the ratio of the air drawn from the mouth end is set to 100% by volume. The air inflow ratio is preferably 50% by volume or more and 80% by volume or less, and more preferably 55% by volume or more and 75% by volume or less. For example, the number of openings V in each opening group can be selected from a range of 5 or more and 50 or less, and the diameter of the openings V can be selected from a range of 0.1 mm or more and 0.5 mm or less, and the above-mentioned air inflow ratio can be achieved by a combination of these selections.

The air inflow ratio can be measured by a method based on ISO9512 using an automatic smoking machine (for example, a single-rod automatic smoking machine manufactured by Borgwaldt).

[Tipping paper 40]

The composition of the tipping paper 40 is not particularly limited, and can be a general one, for example, a composition with pulp as the main component. Pulp may be made from wood pulp such as conifer pulp and broadleaf pulp, or may be made by mixing and manufacturing non-wood pulp generally used for tobacco paper such as flax pulp, hemp pulp, sisal pulp, and Spanish grass. These pulps may be used alone or in combination of a plurality of types at any ratio.

In addition, the tipping paper 40 may be composed of one sheet or may be composed of a plurality of sheets.

As the pulp, chemical pulp based on sulfate cooking, acid/neutral/alkaline sulfite cooking, alkaline cooking, etc., ground pulp, chemical ground pulp, thermomechanical pulp, etc. can be used.

It should be noted that the tipping paper 40 may be manufactured by a manufacturing method described below, or a commercially available product may be used.

The shape of the tipping paper 40 is not particularly limited, and may be, for example, square or rectangular.

The basis weight of the tipping paper 40 is not particularly limited, but is usually 32 gsm to 60 gsm, preferably 33 gsm to 55 gsm, and more preferably 34 gsm to 53 gsm.

The air permeability of the tipping paper 40 is not particularly limited, but is generally 0 CORESTA Unit or more and 30,000 CORESTA Unit or less, preferably more than 0 CORESTA Unit and 10,000 CORESTA Unit or less. The air permeability is a value measured based on ISO 2965:2009, and is expressed as the flow rate (cm ³ ) of gas passing through an area of 1 cm ² per minute when the differential pressure between the two sides of the paper is 1 kPa. 1 CORESTA Unit (1 CORESTA Unit, 1 C.U.) is cm ³ /(min·cm ² ) at 1 kPa.

In addition to the above-mentioned pulp, the tipping paper 40 may further contain fillers, for example, metal carbonates such as calcium carbonate and magnesium carbonate, metal oxides such as titanium oxide, titanium dioxide, and aluminum oxide, metal sulfates such as barium sulfate and calcium sulfate, metal sulfides such as zinc sulfide, quartz, kaolin, talc, diatomaceous earth, gypsum, etc., and calcium carbonate is preferably contained from the viewpoint of improving whiteness/opacity and increasing heating speed. In addition, these fillers may be used alone or in combination of two or more.

In addition to the above-mentioned pulp and filler, various additives may be added to the tipping paper 40. For example, a water resistance enhancer may be included to improve water resistance. The water resistance enhancer includes a wet paper strength enhancer (WS agent) and a sizing agent. Examples of the wet paper strength enhancer include urea-formaldehyde resin, melamine formaldehyde resin, polyamide epichlorohydrin (PAE), etc. In addition, examples of the sizing agent include rosin soap, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA), and highly saponified polyvinyl alcohol with a saponification degree of 90% or more.

A coating agent may be added to at least one of the front and back surfaces of the tipping paper 40. The coating agent is not particularly limited, but is preferably a coating agent that can form a film on the surface of the paper to reduce liquid permeability.

A portion of the outer surface of the tipping paper 40 may be covered with a lip-releasing material. The lip-releasing material refers to a material that is formed in such a way that when the user holds the filter portion 30 of the cigarette rod 1 in the mouth, the auxiliary lip and the tipping paper 40 are substantially non-adherent and easily separated. The lip-releasing material may include, for example, ethyl cellulose, methyl cellulose, etc. For example, the outer surface of the tipping paper 40 may be coated with an ethyl cellulose or methyl cellulose ink, thereby coating the outer surface of the tipping paper 40 with the lip-releasing material.

[Filter portion 30]

The filter portion 30 is connected to the second side of the cooling portion 20 via the tipping paper 40. The tipping paper 40 connects (links) the second side end of the cooling portion 20 and the first side end of the filter portion 30 by integrally winding them.

The filter portion 30 has a filter 31 as a main constituent element.

The filter 31 is not particularly limited as long as it has the general functions of a filter. The general functions of a filter include, for example, the adjustment of the amount of air mixed when inhaling an aerosol, the reduction of flavor, the reduction of nicotine and tar, etc., but it is not necessary to have all of the above functions. In addition, for the non-combustion heating type cigarette rod 1 that generates fewer components than cigarette products and tends to have a lower filling rate of the aerosol source 11, suppressing the filtering function and preventing the aerosol source 11 from falling off is also one of the important functions. The filter 31 usually has a filter material, and the filter material is obtained by using fillers such as cellulose acetate fiber, acetate fiber, charcoal fiber, non-woven fabric, pulp paper, etc. as a filter material and molding it into a cylindrical shape. In addition, it is also possible to use a paper filter filled with sheet-like pulp paper.

The density of the filter material is not particularly limited, but is usually 0.10 g/cm ³ to 0.25 g/cm ³ , preferably 0.11 g/cm ³ to 0.24 g/cm ³ , and more preferably 0.12 g/cm ³ to 0.23 g/cm ³ .

It should be noted that the filter 31 may include a breakable additive release container (e.g., a capsule) containing a breakable shell such as gelatin. The manner of the additive release container such as the capsule is not particularly limited, and a known manner may be used. In the case of a capsule, when it is broken by the user before, during, or after use, the liquid or substance (usually a flavoring agent) contained in the capsule is released, and then the liquid or substance is carried by the aerosol during the use of the cigarette rod, and diffuses to the surrounding environment after use.

The form of the capsule is not particularly limited, for example, it can be a destructible capsule, and its shape is preferably a sphere. As the additive contained in the capsule, any additive can be included, and it is particularly preferred to include a flavoring agent and activated carbon. In addition, as an additive, one or more materials that help filter aerosols can be added. The form of the additive is not particularly limited, and it is usually a liquid or a solid. It should be noted that the destructible capsule and its manufacturing method can be known.

As the flavoring agent, for example, menthol, spearmint, peppermint, fenugreek, clove, medium chain fatty acid triglyceride (MCT) and the like may be used, and one of them or a combination thereof may be used.

In addition, the filter may further include other components, such as inorganic fine powder (kaolin, talc, diatomaceous earth, quartz, calcium carbonate, barium sulfate, titanium oxide, aluminum oxide, etc.), heat stabilizer (alkaline or alkaline earth metal salts, etc.), colorant, whiteness improver, oil, yield improver, sizing agent, biodegradable or photodegradable promoter (anatase titanium oxide, etc.), natural polymer or its derivative (cellulose powder, etc.), etc. Other components can be used alone or in combination of two or more.

The cross section of the filter 31 of the filter portion 30 is substantially circular, and the diameter of the circle can be appropriately changed according to the size of the product, and is usually 4.0 mm or more and 9.0 mm or less, preferably 4.5 mm or more and 8.5 mm or less, and more preferably 5.0 mm or more and 8.0 mm or less. It should be noted that, in the case where the cross section is not circular, for the above-mentioned diameter, it is assumed that a circle with the same area as the area of the cross section is used and the diameter of the circle is applied.

The circumference of the cross section of the filter 31 can be appropriately changed according to the size of the product, and is usually 14.0 mm to 27.0 mm, preferably 15.0 mm to 26.0 mm, and more preferably 16.0 mm to 25.0 mm.

The size of the centerline direction of the filter portion 30 can be appropriately changed according to the size of the product, and is usually 5 mm or more and 30 mm or less, preferably 12.5 mm or more and 27.5 mm or less, and more preferably 15.0 mm or more and 25.0 mm or less. The shape and size of the filter 31 and other structures contained in the filter portion 30 can be appropriately adjusted so that the shape and size of the filter portion 30 are within the above range.

The ventilation resistance per 120 mm in the centerline direction of the filter portion 30 is not particularly limited, but is usually ₄₀ mmH2O to ₃₀₀ mmH2O, preferably ₇₀ mmH2O to ₂₈₀ mmH2O, and more preferably ₉₀ mmH2O to ₂₆₀ mmH2O.

The ventilation resistance can be measured according to the ISO standard method (ISO6565) using, for example, a filter ventilation resistance measuring instrument manufactured by Cerulean. The ventilation resistance of the filter portion 30 refers to the air pressure difference between the first side and the second side when a given air flow rate (17.5 cc/min) of air is allowed to flow from the first side to the second side without air permeation through the side of the filter portion 30. The unit is generally expressed in _mmH2O .

In the filter part 30, from the viewpoint of improving strength and structural rigidity, it is preferred to have a winding paper 32 for winding the filter 31 and the like. The form of the winding paper 32 is not particularly limited, and may have a seam containing one or more rows of adhesive. The adhesive may include a hot melt adhesive, and further, the hot melt adhesive may include polyvinyl alcohol. In addition, in the case where the filter segment is formed by two or more segments, the winding paper preferably winds the above-mentioned two or more segments together.

The material of the wrapping paper 32 is not particularly limited, and a known material can be used. The wrapping paper 32 may contain a filler such as calcium carbonate.

The thickness of the wrapping paper 32 is not particularly limited, but is usually 20 μm to 140 μm, preferably 30 μm to 130 μm, and more preferably 30 μm to 120 μm.

The basis weight of the wrapping paper 32 is not particularly limited, but is usually 20 gsm or more and 100 gsm or less, preferably 22 gsm or more and 95 gsm or less, and more preferably 23 gsm or more and 90 gsm or less.

The wrapping paper 32 may be coated or uncoated, but is preferably coated with a desired material from the viewpoint of being able to impart functions other than strength and structural rigidity.

The filter portion 30 may further include a central hole portion having one or more hollow portions.

Fig. 3(a) shows a diagram including a central hole 35 as a schematic diagram of a longitudinal section of the filter portion 30 of the non-combustion heating type cigarette rod according to the second embodiment. The left side of Fig. 3(a) is the cooling portion 20 side (the first side), and the right side is the end side (the second side) that the user holds with his mouth for inhalation.

The center hole portion 35 is usually arranged on the cooling unit 20 side relative to the filter 31 as shown in the figure, and is preferably arranged adjacent to the cooling unit 20 .

The central hole portion 35 is composed of a filling layer 33 having one or more hollow parts, and an inner winding paper 34 covering the filling layer 33. The central hole portion 35 has the function of increasing the strength of the filter portion 30. The filling layer 33 can be made into a rod with an inner diameter of 1.0 mm or more and 5.0 mm or less, which is filled with cellulose acetate fibers at a high density and a plasticizer containing triacetin is added at a rate of 6% by mass or more and 20% by mass or less relative to the mass of cellulose acetate and solidified. Since the filling density of the fibers of the filling layer 33 is high, air and aerosol only flow through the hollow part during inhalation, and basically do not flow through the filling layer 33. Since the filling layer 33 inside the central hole portion 35 is a fiber filling layer, the touch from the outside during use is unlikely to make the user feel uncomfortable. It should be noted that the central hole portion 35 may also not have an inner winding paper 34 and maintain its shape by thermoforming.

The center hole portion 35 and the filter 31 can be connected together, for example, by using an outer winding paper 36. The outer winding paper 36 can be, for example, a cylindrical paper. In addition, the base material portion 10, the cooling portion 20, and the connected center hole portion 35 and the filter 31 can be connected together, for example, by using a tipping paper 40. They can be connected, for example, by applying a vinyl acetate-based glue or the like on the inner side of the outer winding paper 36, and then putting the base material portion 10, the cooling portion 20, and the connected center hole portion 35 and the filter 31 into the outer winding paper 36 and winding them. They can be connected together by using a plurality of papers and dividing them multiple times.

The inner wrapping paper 34 and the outer wrapping paper 36 used for the center hole 35 may be the same wrapping paper as the wrapping paper 32 in terms of form, material, thickness, basis weight, etc. Alternatively, the inner wrapping paper 34 may not be used.

In addition, the filter 31 of the filter portion 30 may be divided into two or more sections, and cavities may be formed between the filters.

FIG3(b) shows a view in which a cavity 37 is formed between filters 31 as a schematic diagram of a longitudinal section of the filter portion 30 of the non-combustion heating type cigarette rod according to the third embodiment. FIG3(b) is also similar to FIG3(a), and the left side of the figure is the cooling portion 20 side (the first side), and the right side is the end side (the second side) that the user holds with his mouth for inhalation.

In FIG3(b), the filter 31 is formed into two sections, and there is a hollow cavity 37 between the two filters. The cavity 37 can be formed by winding the winding paper 32 in a state where the two filter sections are arranged at desired positions. Usually, a part of the base material part 10, the cooling part 20 and the filter part 30 are further wrapped with a tipping paper (omitted in the figure) outside the winding paper 32.

A breakable additive release container (e.g., a capsule) having a breakable outer shell of gelatin or the like, which is the same as the additive release container included in the filter 31, can be placed in the cavity 37. When one capsule is placed in the cavity 37, the size of the capsule may be less than 5 mm and smaller than the inner diameter of the cavity 37. When two or more capsules are placed in the cavity 37, the size of the capsule may be less than 3.5 mm and smaller than the inner diameter of the cavity 37.

A porous adsorbent such as activated carbon, which will be described later, may be disposed in the cavity 37 .

[Porous adsorbent]

In the above-described embodiment, a porous adsorbent is contained in at least one of the substrate portion 10, the cooling portion 20, and the filter portion 30. The porous adsorbent is usually disposed at a location in contact with the aerosol in the cigarette rod 1. It is preferably contained in at least one of the cooling portion 20 and the filter portion 30, and most preferably contained in at least the filter portion 30.

The porous adsorbent is not particularly limited and can be either inorganic or organic. Examples of adsorbents that can be used include activated carbon, sepiolite, palygorskite, zeolite, activated carbon fiber, activated alumina, sepiolite mixed paper, silica gel, activated clay, vermiculite, and diatomaceous earth as inorganic porous adsorbents. In addition, porous adsorbents of organic matter include polymer porous bodies such as pulp, various fibers, and ion exchange resins. Among these porous adsorbents, from the viewpoint of being able to further remove aroma and taste-hindering components such as aldehydes, aniline compounds, hydrazine compounds, and amino compounds that are reactive with aldehydes can be adsorbed/retained in the pores of the porous adsorbent and used together with the porous adsorbent.

Among these porous adsorbents, activated carbon is preferred from the viewpoints of not adversely affecting the flavor and aroma, being able to improve the flavor and aroma as needed, and adsorbing flavor and aroma-inhibiting components such as aldehydes.

For activated carbon, from the perspective of increasing the ratio of pores corresponding to the size of aerosol particles generated in non-combustion heating type cigarette rods (usually 1 nm or more and 100 μm or less) in order to improve the adsorption of aldehydes, the ratio of the pore volume of pores with a diameter of 50 nm or more and 5000 nm or less (large pores) to the total pore volume of pores with a diameter of 5000 nm or less is preferably 15% or more, more preferably 20% or more, further preferably 30% or more, and particularly preferably 40% or more. In addition, the ratio of the pore volume of pores with a diameter of 50 nm or more and 5000 nm or less is preferably 99% or less, and particularly preferably 95% or less.

In addition, "the ratio of the volume of pores having a pore diameter of 50 nm or more and 5000 nm or less to the total volume of pores having a pore diameter of 5000 nm or less" is measured as follows.

The total pore volume of pores with a diameter of 5000 nm or less, and the pore diameter distribution of pores with a diameter of less than 2 nm (micropores) and pore diameters of 2 nm or more and 50 nm or less (mesopores) were measured by the nitrogen adsorption method (BET multipoint method). It should be noted that the total pore volume was calculated based on the amount of adsorbed gas when P/P ₀ = 0.998, assuming that the pores were filled with liquid nitrogen. In addition, the cumulative pore volume of pores with a diameter of 6.5 nm or more and 5000 nm or less was measured by mercury penetration, and the results of the two methods were combined to obtain the "ratio of the pore volume of pores with a diameter of 50 nm or more and 5000 nm or less to the total pore volume of pores with a diameter of 5000 nm or less".

In addition, for activated carbon, from the viewpoint of increasing the pore volume corresponding to the size of aerosol particles generated in the non-combustion heating type cigarette rod in order to improve the adsorption of aldehydes, etc., the pore volume of pores with a pore diameter of 50 nm or more and 5000 nm or less (large pores) is preferably 0.2 cm ³ /g or more and 0.9 cm ³ /g or less. The pore volume in the above range is more preferably 0.3 cm ³ /g or more, and particularly preferably 0.4 cm ³ /g or more. In addition, it is more preferably 0.8 cm ³ /g or less, and even more preferably 0.7 cm ³ /g or less.

The “pore volume of pores having a pore diameter of 50 nm or more and 5000 nm or less (large pores)” is determined by pore diameter distribution measurement using mercury intrusion porosimetry.

In the present embodiment, it is more preferred that the pore volume ratio of the activated carbon (micropores) is not too large, and therefore, the ratio of the pore volume of pores with a pore diameter of 50 nm or less to the total pore volume of pores with a pore diameter of 5000 nm or less is preferably 70% or less, and more preferably 65% or less. In the non-combustion heating type cigarette rod, large pores with a pore diameter of 50 nm or more and 5000 nm or less play the main function of the activated carbon, and therefore, the ratio of the pore volume of the pore diameter of less than 2 nm may be used even if it is 0%.

The ratio of the pore volume with a pore diameter less than 2 nm can be determined by the nitrogen adsorption method from the pore volume with a pore diameter less than 2 nm (micropores) and the total pore volume with a pore diameter of 5000 nm or less determined by the nitrogen adsorption method.

The BET specific surface area of activated carbon is generally 600 m ² /g or more and 1800 m ² /g or less.

Many activated carbons have a BET specific surface area of 800 m ² /g or more and 1300 m ² /g or less, and these activated carbons can be used.

As activated carbon that can be used in this embodiment, the cumulative 10 volume % particle size (particle size D10) of the activated carbon particles is preferably 250 μm or more and 1200 μm or less. In addition, the cumulative 50 volume % particle size (particle size D50) of the activated carbon particles is preferably 350 μm or more and 1500 μm or less. It should be noted that D10 and D50 can be measured by laser diffraction scattering method.

The method for producing activated carbon is not particularly limited. Examples of the raw material include carbonaceous materials such as wood, lignite, coal, coconut husk or shell, peat, asphalt, polymers, cellulose fibers, and polymer fibers.

Activated carbon can be produced by imparting adsorption performance to a raw material through any appropriate process such as physical activation (activation) or chemical activation (activation).

In physical activation, the raw material is subjected to a) carbonization, b) activation/oxidation, or c) carbonization and activation/oxidation, using high temperature gas to produce activated carbon. a) Carbonization process includes the step of thermally decomposing the raw material at a high temperature generally in the range of about 600°C to about 900°C in the absence of oxygen. b) Activation/oxidation includes the step of exposing the carbonized material to an oxidizing gas atmosphere such as steam, carbon dioxide or oxygen at a temperature exceeding 250°C. The temperature of activation/oxidation is generally in the range of about 600°C to about 1200°C. c) Carbonization and activation/oxidation performs both a) carbonization process and b) activation/oxidation.

Chemical activation includes the process of impregnating a given chemical reagent such as an acid, alkali or salt such as phosphoric acid, potassium hydroxide, sodium hydroxide, calcium chloride or zinc chloride into the raw material. Then, the material impregnated with the chemical reagent is generally carbonized at a lower temperature than the physical activation carbonization. For example, the temperature of chemical activation carbonization can be set to a range of about 450°C or more and about 900°C or less. Carbonization and activation can occur simultaneously.

By adjusting the raw material and the physically or chemically suitable activation process, activated carbon having desired pore characteristics can be produced. In addition, a commercially available product suitable for the intended implementation can also be selected and used.

Examples of activated carbon that can be used in the present embodiment are shown in Table 1 below together with the main physical properties of each activated carbon.

[Table 1]

In the table, the pore distribution is the ratio of the pore volume with a pore diameter of 50 nm to 5000 nm to the total pore volume with a pore diameter of 5000 nm or less, and the ratio of the pore volume with a pore diameter of less than 2 nm to the total pore volume with a pore diameter of 5000 nm or less.

[Porous adsorbent placement location]

As described above, the cigarette rod 1 contains a porous adsorbent in at least one of the base material portion 10, the cooling portion 20, and the filter portion 30. Preferably, it is both or either of the cooling portion 20 and the filter portion 30, and preferably it is arranged in the filter 31 of the filter portion 30. As described above, the porous adsorbent used is preferably activated carbon having desired pore properties and the like.

The location and form of the porous adsorbent such as activated carbon are not particularly limited, and the main locations and forms are as follows. It should be noted that the description of activated carbon is omitted in FIGS. 1 to 3 .

1) Inside the filter 31 of the filter portion 30

Most typically, the activated carbon is contained within the filter 31. In this case, it is usually contained within the filter material.

When the filter 31 is composed of one section as shown in FIG1 , the activated carbon may be uniformly contained in the filter, or a concentration gradient may be set, or the activated carbon may be present at a higher concentration at a specific position in the filter. When a concentration gradient is set or the concentration is increased at a specific position, it is preferred to remove the aroma and taste hindering components in the product at a position away from the user, and therefore, it is preferred that a large amount of activated carbon is present on the cooling portion 20 side (first side) in the filter 31.

In addition, when the filter 31 is composed of multiple sections, the activated carbon can be present in any section. From the perspective of removing flavor-hindering components such as aldehydes at a position away from the user as described above, it is preferred that the activated carbon be present in large quantities in the section located on the cooling section 20 side (first side) within the filter 31.

2) In the paper layer of the winding paper 32 of the winding filter 31 or on the surface opposite to the filter 31

Activated carbon may be contained in the wrapping paper 32 that wraps the filter 31. In this case, it is preferable to add activated carbon having a particle size smaller than the thickness of the wrapping paper 32 when manufacturing the wrapping paper 32, and to contain the activated carbon in the paper layer constituting the wrapping paper 32.

Alternatively, it may be disposed on the surface of the winding paper 32 facing the filter 31. In this case, the activated carbon may be attached to the surface of the winding paper 32 facing the filter by using an adhesive, or when a coating agent is applied to the surface of the winding paper 32, the activated carbon and the coating agent may be present on the desired surface when the activated carbon is manufactured.

3) Inside the hollow portion of the filter portion 30

The activated carbon may be present in the hollow portion of the filter portion 30. The hollow portion may be the hollow portion provided in the central hole portion 35 as shown in the schematic diagram of FIG3(a), or may be another hollow portion. In addition, the hollow portion may be in the through hole that penetrates the filter portion 30.

In these cases, activated carbon can be filled in the entire hollow portion, or can be filled in a part of the hollow portion. When the hollow portion has an opening for the cooling portion 20 as shown in Fig. 3 (a), it is preferred to block the opening of the hollow portion with thin paper, filter material, etc. in a manner that does not leak to the cooling portion 20.

4) The surface of the filter portion 30 facing the hollow portion

The activated carbon may be present on the surface of the hollow portion of the filter portion 30. The hollow portion may be a hollow portion provided in the central hole portion 35 as shown in FIG. 3( a) , or may be another hollow portion. In this case, the activated carbon may be attached to the hollow portion side of the filling layer 33 of the central hole portion by using an adhesive or the like, and the activated carbon may be formed in a manner that covers a part or all of the hollow portion of the filling layer 33.

5) The filter 31 has multiple sections, and the cavity 37 formed between the sections

As shown in the schematic diagram of Fig. 3(b), the activated carbon can be arranged in the cavity 37 formed between the filter 31 formed by the plurality of segments. In this case, for the activated carbon, the granular material can be filled in the cavity 37, or the activated carbon can be formed into the shape of the cavity and arranged in the order of filter-activated carbon-filter.

In FIG. 3( b ), the filter 31 has two sections, but the filter 31 may have three or more sections, and activated carbon may be disposed in each of the plurality of cavities 37 formed between the filters.

6) Others

Activated carbon may also be present in the cooling part 20. In the case where the cooling part 20 has an opening V, it is preferred to use activated carbon having a particle size larger than the width of the opening V, or activated carbon molded in a manner larger than the width of the opening V, from the viewpoint of not being exposed outside the cigarette rod. A layer of a porous molded body composed of activated carbon may be arranged between the cooling part 20 and the filter part 30 in a manner covering the filter 31, or the molded body may be arranged between the cooling part 20 and the substrate part 10.

In addition, it may be present in the molding paper 21 that molds the cooling unit 20. For example, activated carbon having a particle size smaller than the thickness of the molding paper 21 may be used during manufacturing and may be present in the paper layer of the molding paper 21, or may be attached to the inner side of wrinkles and folds during molding using an adhesive, or may be coexistent with a surface treatment agent such as a coating agent when applying the surface treatment agent.

Furthermore, a part of the activated carbon may be present together with the aerosol source 11 of the substrate portion 10 and the like, and the heated product in the substrate portion may be brought into contact with the activated carbon within the substrate portion.

By making the activated carbon present in the cigarette rod in these locations/methods, the user's smoking satisfaction can be maintained in the non-combustion heating type cigarette rod with a high heating temperature, and aroma and taste hindering components such as aldehydes can be removed.

[Addition of porous adsorbent]

Regarding the addition of the porous adsorbent, a case where activated carbon is used in the filter 31 will be described as a preferred example.

In one non-combustion heating type cigarette rod, the amount added to the filter material of the filter 31 is preferably 15.0 m 2 /cm 2 or more and 80.0 m ² /cm ² or less, calculated as the value of "specific surface area of activated carbon × weight of activated carbon / cross-sectional area in a direction perpendicular to the ventilation direction of the filter material". This value is more preferably 17.0 ^{m 2} /cm ² or ^more , and further preferably 35.0 m ² /cm ² or more. In addition, it is more preferably 77.0 m ² /cm ² or less, and further preferably 73.0 m ² /cm ² or less.

For convenience, the above “specific surface area of activated carbon×weight of activated carbon/cross-sectional area in a direction perpendicular to the ventilation direction of the filter material” may be expressed as “surface area of activated carbon per unit cross-sectional area”.

In this embodiment, by making the surface area of the activated carbon per unit cross-sectional area within the preferred range such as the above range, the components generated by heating can be delivered to the user in a desired amount, and the desired fragrance can be provided to the user. If the surface area of the activated carbon per unit cross-sectional area is too small, there is a tendency that the effect brought about by adding the activated carbon cannot be fully obtained. On the other hand, if the surface area of the activated carbon per unit cross-sectional area is too large, there is a tendency that the components generated by heating are excessively reduced.

The surface area of the activated carbon per unit cross-sectional area can be adjusted, for example, by adjusting the specific surface area of the activated carbon and the amount of activated carbon added, and the cross-sectional area in a direction perpendicular to the air flow direction of the filter material.

The average surface area of the activated carbon per unit cross-sectional area can be calculated based on the specific surface area of the activated carbon added to the filter material of a non-combustion heating type cigarette rod, the weight of the added activated carbon, and the cross-sectional area of the filter material. In the case where the filter portion 30 is composed of multiple filters 31, only the cross-sectional area and length of the filter material to which the activated carbon is added are used as the benchmark. It should be noted that sometimes the activated carbon is not evenly dispersed in the added filter material, and it is difficult to satisfy the above range in all cross-sections of the filter material (the cross-section in the direction perpendicular to the ventilation direction), as long as the average value of the entire cross-section is within the above range.

The amount of activated carbon added per unit length in the ventilation direction of the filter material to which activated carbon is added is preferably 5 mg/cm to 50 mg/cm, more preferably 8 mg/cm to 40 mg/cm, and even more preferably 10 mg/cm to 35 mg/cm.

The amount of activated carbon added is, for example, 4.0 mg to 24.0 mg, preferably 4.5 mg to 23.0 mg, and more preferably 10.5 mg to 22.0 mg, based on the weight of the entire filter portion 30 .

Claims (9)

1. A non-combustion heating type cigarette rod, which has: a substrate portion including an aerosol source, a cooling unit for cooling the vapor generated by heating the substrate unit to generate an aerosol, and a filter portion disposed at a location where the aerosol passes, At least any one of the substrate portion, the cooling portion, and the filter portion contains a porous adsorbent. 2. The non-combustion heating type cigarette rod according to claim 1, wherein: The porous adsorbent is activated carbon. 3. The non-combustion heating type cigarette rod according to claim 2, wherein: The ratio of the volume of pores having pore diameters of 50 nm or more and 5000 nm or less to the total volume of pores having pore diameters of 5000 nm or less in the activated carbon is 15% or more. 4. The non-combustion heating type cigarette rod according to claim 2 or 3, wherein: The activated carbon has a pore volume of 0.2 cm ³ /g to 0.9 cm ³ /g for pores with a diameter of 50 nm to 5000 nm. 5. The non-combustion heating type cigarette rod according to any one of claims 2 to 4, wherein: The ratio of the volume of pores having pore diameters less than 2 nm to the total volume of pores having pore diameters of 5000 nm or less in the activated carbon is 70% or less. 6. The non-combustion heating type cigarette rod according to any one of claims 2 to 5, wherein: The activated carbon has a BET specific surface area of 600 m ² /g or more and 1800 m ² /g or less. 7. The non-combustion heating type cigarette rod according to any one of claims 1 to 6, wherein: The porous adsorbent is arranged at a location in the cigarette rod that contacts the aerosol. 8. The non-combustion heating type cigarette rod according to claim 7, wherein: The porous adsorbent is present in any one or more of the following 1) to 5): 1) Inside the filter tip of the filter tip, 2) in the paper layer of the winding paper for winding the filter or on the surface opposite to the filter, 3) In the hollow part of the filter part, 4) a surface facing the hollow portion, 5) The filter has a plurality of sections and is formed in cavities between the sections. 9. A non-combustion heating type cigarette rod, which has: A substrate portion including an aerosol source, and a filter portion disposed at a location through which aerosol generated by heating the substrate portion passes; At least one of the substrate portion and the filter portion contains activated carbon in which the ratio of the volume of pores having a pore diameter of 50 nm to 5000 nm to the total volume of pores having a pore diameter of 5000 nm or less is 15% or more.