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.
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.
The present invention relates to a wrapper for a non-combustion heating type flavor inhalation article.
A wrapper constituted of paper is used for a flavor inhalation article. Conventionally, paper with various functions imparted have been proposed. For example, PTL 1 discloses paper for reducing visible sidestream smoke of a combustion type tobacco, and in particular, discloses paper containing a filling material of 12.6 to 17.4 wt% and having a grammage of 30 to 38.2 g/m2 (example). Also, paper for reducing the occurrence of stains in non-combustion heating type smoking articles have also been proposed. For example, PTL 2 discloses paper containing a filler of 23 to 50 wt% and having a grammage of 23 to 45 g/m2, and PTL 3 discloses paper containing a filler of 26 to 32 wt% and having a grammage of 25 to 40 g/m2.
A non-combustion heating type flavor inhalation article generates an aerosol when a tobacco rod is heated. At this time, a wrapping paper or a tipping paper of the tobacco rod is deteriorated by heating. As a result, the non-combustion heating type flavor inhalation article is torn or broken, and the handleability is impaired in some cases. In view of such circumstances, an object of the present invention is to provide a non-combustion heating type flavor inhalation article that is excellent in handleability after heating.
The inventors have found that a wrapper containing a specific amount of a filler and including a base paper having a specific grammage solves the above-described problem.
The present invention can provide a non-combustion heating type flavor inhalation article that is excellent in handleability after heating.
The present invention will be described in detail below. In the present invention, "X to Y" includes X and Y that are end values thereof.
A wrapper according to the present aspect includes a specific base paper. The base paper is a substrate containing pulp and does not contain a coating layer. The base paper has a grammage of 40 g/m2 or more and contains a filler of 10 wt% or less. The filler is an inorganic filling material added to the base paper to impart smoothness, brightness, opacity, and the like to the paper. Examples of the filler include, but not limited to, calcium carbonate, talc, and clay. Among these, calcium carbonate is preferable from the viewpoint of availability and the like.
When the grammage of the base paper is within the above-described range, the strength of the wrapper is improved. However, when the grammage of the base paper is within this range, the wrapper becomes fragile if the content of the filler is excessive. The inventors have found that the toughness of the wrapper can be increased by setting the filler content of the base paper to 10 wt% or less. From such a viewpoint, the lower limit of the grammage of the base paper is preferably 42 g/m2 or more, more preferably 43 g/m2 or more, and further preferably 45 g/m2 or more. The upper limit of the grammage is not limited, but is preferably 60 g/m2 or less, and more preferably 50 g/m2 or less. The upper limit of the filler content is preferably 7 wt% or less. The lower limit of the filler content is not limited, but is preferably 2 wt% or more.
The base paper may contain a combustion retardant such as aluminum hydroxide. The amount of the combustion retardant may be a known amount, but is preferably about 1 to 10 g/m2
A known clear coating layer or pigment coating layer may be provided on the base paper. As the pigment in the pigment coating layer, one known in the papermaking field can be used. Examples thereof include calcium carbonate, titania, clay, talc, and the like. The coating amount per one side is preferably 3 g/m2 or more, more preferably 4 g/m2 or more, and further preferably 5 g/m2 or more. The upper limit of the coating amount is not limited, but is preferably 10 g/m2 or less.
The content of the pigment in the coating layer is not limited, but the lower limit thereof is preferably 5 wt% or more. The upper limit thereof is preferably 50 wt% or less. The coating layer contains a known binder and the like in addition to the pigment.
The grammage of the wrapper is not limited as long as it is 40 g/m2 or more, but is preferably 45 g/m2 or more, and more preferably 50 g/m2 or more. The upper limit of the grammage of the wrapper is not limited, but is preferably 80 g/m2 or less. The grammage is measured in conformity with JIS P 8124.
The ash content is the amount of ash residue (wt%) relative to the oven-dried weight of the sample, and is an index of the total amount of the filler and the pigment in the pigment coating layer. The ash content of the wrapper is not limited, but the lower limit thereof is preferably 1 wt% or more, and more preferably 3 wt% or more. The upper limit thereof is preferably 10 wt% or less, and more preferably 7 wt% or less. The ash content is measured in conformity with JIS P 8252.
The tensile strength in an MD direction of the wrapper is preferably 40 N/15 mm or more, more preferably 50 N/15 mm or more, and further preferably 55 N/15 mm or more. Also, the tensile strength in a CD direction of the wrapper is preferably 20 N/15 mm or more, and more preferably 25 N/15 mm or more. The tensile strength is measured in conformity with JIS P 8113.
The thickness of the wrapper is not limited, but is preferably 45 µm or more, and more preferably 50 µm or more, from the viewpoint of strength. The upper limit of the thickness of the wrapper is not limited, but can be, for example, 70 µm or less. The thickness is measured in conformity with JIS P 8118.
The wrapper is useful as a wrapping paper or a tipping paper. The wrapping paper is a paper directly wrapped around the filler. The tipping paper is a paper that is wrapped around and joins a plurality of members. In particular, the wrapper is preferably a wrapping paper or a tipping paper that is wrapped around a member of a portion of a non-combustion heating type flavor inhalation article to be heated by a heater. Specifically, the wrapper is preferably a wrapping paper of a tobacco rod or a tipping paper for joining the tobacco rod to another member. Examples of the other member include a support member, a cooling member, and a mouthpiece.
The tobacco rod is a member having a substantially circular pillar shape for generating an inhaling flavor component contained in a tobacco material. The tobacco rod includes a tobacco material and a wrapping paper (wrapper) wrapped around the tobacco material. The shape of the tobacco material to be filled in the wrapping paper is not limited, and examples thereof include a sheet, a cut sheet obtained by cutting the sheet to have a width of 0.8 to 1.2 mm, and a cut piece cut to have a width of 0.8 to 1.2 mm. The sheet may be gathered, folded, or spirally formed without being cut, and filled in a wrapping paper to obtain a tobacco rod. Alternatively, the sheet may be cut into strips, and these strips may be filled into a wrapping paper in a concentric manner or in such a manner that the longitudinal direction of the strips is parallel to the longitudinal direction of the tobacco rod to obtain a tobacco rod.
The filling density of the tobacco material is not particularly limited, but is usually 250 mg/cm3 or more, and preferably 320 mg/cm3 or more, from the viewpoint of securing the characteristics of the non-combustion type flavor inhalation article and imparting a good smoke taste. Also, the upper limit thereof is usually 800 mg/cm3 or less, and preferably 600 mg/cm3 or less. The length of the tobacco rod 1 is not limited, but is preferably 15 to 25 mm. The diameter thereof is not limited, but is preferably 6 to 8 mm.
The tobacco material may generate vapor upon heating. The heating temperature is not limited, but is about 250°C to 350°C. To promote generation of an aerosol, an aerosol source such as a polyol, e.g., glycerine, propylene glycol, 1,3-butanediol, etc., may be added to the tobacco material. The amount of the aerosol source to be added is preferably 5 to 50 wt%, and more preferably 10 to 30 wt%, relative to the dry weight of the tobacco material. In addition, a known flavoring agent and the like may be added to the tobacco material.
The adjacent member 3 is a member adjacent to the downstream side of the tobacco rod 1. The downstream refers to the direction toward the mouthpiece 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, and a mouthpiece (described later). The adjacent member 3 is preferably a cooling member.
The cooling member is a member for promoting aerosolization, for example, by cooling the inhaling flavor component and vapor generated in the tobacco rod 1. The cooling member may be a hollow paper tube. The paper tube is preferably constituted of a cardboard having a higher rigidity than the rigidity of the wrapping paper or the tipping paper. The paper tube may be provided with a ventilation V (perforation). Preferably, a plurality of ventilations are provided along the circumference of the paper tube. Also, the cooling member may be filled with a gathered sheet for increasing the 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.
The mouthpiece is a member constituting the mouthpiece end. In an aspect, the mouthpiece 5 includes the filter 52 and the center hole filter 54. As the filter 52 and the center hole filter 54, known filters can be used.
The combination of the non-combustion heating type flavor inhalation article and a heating device is also referred to as a non-combustion heating type flavor inhalation system.
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 recessed portion H6, and the heater H2 and the metal tube H3 are disposed at positions corresponding to the tobacco rod 1 inserted into the recessed portion H6. The heater H2 can be a heater using electric resistance, and the heater H2 performs heating with electric power being supplied from the battery unit H4 in response to an instruction from the control unit H5 that performs temperature control. The heat generated from the heater H2 is transferred to the tobacco rod 1 through the metal tube H3 having high thermal conductivity. Although the aspect in which the heating device 30 heats the tobacco rod 1 from the outside has been illustrated in the figure, the heating device 30 may heat the tobacco rod 1 from the inside. The heating temperature by the heating device 30 is not particularly limited, but is preferably 400°C or less, more preferably 150°C to 400°C, and further preferably 200°C to 350°C. The heating temperature indicates the temperature of the heater of the heating device 30.
The portion of the non-combustion heating type flavor inhalation article to be inserted into the heating device 30 preferably includes a portion or the entirety of the tobacco rod 1 or a joint portion between the tobacco rod 1 and the adjacent member 3. In this case, the non-combustion heating type flavor inhalation article preferably includes the wrapper W according to the present aspect in the portion to be inserted into the heating device 30.
The wrappers presented 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 performed in conformity with the following.
A paper tube having a length of 15 mm and a paper tube having a length of 45 mm were prepared, and both were disposed so that end faces were in contact with each other. Each of the wrappers presented in Table 1 was wrapped around the region containing the joint portion, and the two paper tubes were joined to prepare a test piece. The test piece was inserted into the heating device illustrated in
The heated test piece was cooled to room temperature and subjected to a breaking test. The outline of the test is illustrated in
The test piece is a model of the non-combustion heating type flavor inhalation article illustrated in
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