Cylindrical body

Abstract

This tubular body comprises: a first sheet-shaped material that has a circular or elliptical cross-sectional shape orthogonal to the axial direction; a second sheet-shaped material that is provided to the outer circumference of the first sheet-shaped material and that has a circular or elliptical cross-sectional shape orthogonal to the axial direction; an adhesive layer that is provided between the first sheet-shaped material and the second sheet-shaped material and that adheres the first sheet-shaped material and the second sheet-shaped material to each other; and a plurality of vent holes that pass through the first sheet-shaped material and the second sheet-shaped material and that are formed in the circumferential direction of the tubular body. The plurality of vent holes include at least one first vent hole in which the adhesive layer is exposed to an inner surface of the vent hole, and at least one second vent hole in which the adhesive layer is not exposed to the inner surface of the vent hole.

Description

[Technical Field]

[0001] The present invention relates to a cylindrical body. [Background technology]

[0002] Conventionally, a two-layered small tube (cylinder) manufactured from first and second strip portions of material has been known (see, for example, Patent Document 1). This two-layered small tube can be applied to, for example, a flavor-generating article used in a non-combustion flavor inhaler for inhaling flavors without burning a material, or a combustion-type smoking article.

[0003] The second material strip portion is wound around the first material strip portion so that the abutting edges of the first and second material strip portions are offset from each other in the circumferential direction, and a positioning adhesive and a seam adhesive (collectively referred to as adhesive) are applied over the entire surface or almost the entire surface of the first material strip portion and the second material strip portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-93867 Summary of the Invention [Problem to be solved by the invention]

[0005] When the small tube body described in Patent Document 1 is applied to a flavor-generating article or a smoking article, the small tube body is incorporated into a semi-finished flavor-generating article or smoking article, and then a laser beam is irradiated from the outer circumference of the small tube body to the inner circumference, burning the material at the irradiated points, thereby forming air holes that pass through the small tube body intermittently around the entire circumference.

[0006] In the small tube described in Patent Document 1, the adhesive is applied over the entire surface or almost the entire surface between the first material strip portion and the second material strip portion, so when forming the ventilation hole, there is a risk that the combustion ash of the adhesive will clog the ventilation hole.

[0007] Specifically, the paper that makes up the small tube is made of, for example, organic wood pulp (almost pure cellulose with the lignin, hemicellulose, etc. contained in trees removed) and inorganic filler (calcium carbonate), and the combustion ash produced by irradiating it with a laser beam is mainly composed of calcium carbonate.

[0008] In contrast, the adhesive is, for example, a mixture of organic polymers such as modified starch, vinyl acetate, or ethylene vinyl acetate, alcohols, and water, and the combustion ash produced by irradiating the laser beam mixes with the remaining organic polymers.

[0009] Therefore, the combustion ash in the ventilation holes formed in areas where the adhesive is applied is a mixture of calcium carbonate and organic polymers, and is more sticky and more likely to clog the ventilation holes than the combustion ash, which is mainly composed of calcium carbonate, in ventilation holes formed in areas where the adhesive is not applied.

[0010] When a small tube with a blocked vent hole is used in a flavor-generating article or a smoking article, air is not introduced into the flavor-generating article or the smoking article through the vent hole, so the aerosol generated by heating the flavor-generating article or burning the smoking article is not cooled, and the aerosol concentration is not reduced, which may result in a deterioration in the quality of the flavor-generating article or the smoking article.

[0011] The present invention has been made to solve at least some of the problems described above, and aims to obtain a cylindrical body that can prevent the combustion ash of the adhesive from blocking the ventilation hole when the ventilation hole is formed. [Means for solving the problem]

[0012] A first aspect of the present invention provides a cylindrical body comprising a first sheet-like material having a circular or elliptical cross-section perpendicular to the axial direction, a second sheet-like material provided around the outer periphery of the first sheet-like material and having a circular or elliptical cross-section perpendicular to the axial direction, an adhesive layer provided between the first and second sheet-like materials and bonding the first and second sheet-like materials together, and a plurality of ventilation holes formed in the circumferential direction of the cylindrical body, penetrating the first and second sheet-like materials, the plurality of ventilation holes including at least one first ventilation hole in which the adhesive layer is exposed on an inner surface of the ventilation hole and at least one second ventilation hole in which the adhesive layer is not exposed on the inner surface of the ventilation hole.

[0013] According to the first aspect of the present invention, the plurality of ventilation holes have at least one first ventilation hole in which the adhesive layer is exposed on the inner surface of the ventilation hole, and at least one second ventilation hole in which the adhesive layer is not exposed on the inner surface of the ventilation hole, thereby reducing the probability of a ventilation hole being formed at the location where the adhesive layer is provided and preventing the combustion ash of the adhesive from blocking the ventilation hole.

[0014] In a second form of the present invention, in the first form, the first sheet-like material and the second sheet-like material are stacked on top of each other with a staggered relationship so that their circumferential ends do not overlap, the first sheet-like material has a first main body portion and a first extension portion extending from the first main body portion in the circumferential direction relative to the opposing second sheet-like material, the second sheet-like material has a second main body portion and a second extension portion extending from the second main body portion in the circumferential direction relative to the opposing first sheet-like material, and the adhesive layer has a positioning adhesive layer that bonds the first main body portion and the second main body portion to each other and a seam adhesive layer that bonds the first extension portion and the second extension portion to each other, and the positioning adhesive layer has an adhesive pattern in which positioning glue is applied in a line pattern.

[0015] According to the second aspect of the present invention, the positioning adhesive layer that bonds the first body portion of the first sheet-like material and the second body portion of the second sheet-like material to each other has an adhesive pattern in which the positioning glue is applied in a linear pattern, thereby reducing the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0016] In a third aspect of the present invention, in the second aspect, the positioning glue is applied in the form of two or more lines.

[0017] According to the third aspect of the present invention, the positioning adhesive layer has an adhesive pattern in which positioning glue is applied in two or more lines, thereby reducing the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0018] In a fourth aspect of the present invention, in the third aspect, the positioning adhesive is applied in a linear shape.

[0019] According to the fourth aspect of the present invention, the positioning adhesive layer has an adhesive pattern in which positioning glue is applied in two or more straight lines, thereby reducing the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0020] In a fifth aspect of the present invention, in the fourth aspect, the positioning glue is applied in a straight line parallel to the axial direction.

[0021] According to the fifth aspect of the present invention, the positioning adhesive layer has an adhesive pattern in which positioning glue is applied in two or more straight lines parallel to the axial direction, thereby making it possible to reduce the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0022] In a sixth aspect of the present invention, in the fourth aspect, the positioning adhesive is applied in a linear shape perpendicular to the axial direction.

[0023] According to the sixth aspect of the present invention, the positioning adhesive layer has an adhesive pattern in which positioning glue is applied in two or more straight lines perpendicular to the axial direction, thereby making it possible to reduce the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0024] In a seventh aspect of the present invention, in the second aspect, the positioning glue is applied spirally along the axial direction.

[0025] According to the seventh aspect of the present invention, the positioning adhesive layer has an adhesive pattern in which the positioning glue is applied spirally along the axial direction, thereby reducing the amount of adhesive applied compared to when the positioning adhesive layer is applied over the entire surface.

[0026] In an eighth aspect of the present invention, in any one of the first to seventh aspects, the first sheet material and the second sheet material are each paper.

[0027] According to the eighth embodiment of the present invention, the first sheet material and the second sheet material are each made of paper, thereby improving the workability of the cylindrical body.

[0028] A ninth aspect of the present invention is any of the first to eighth aspects, wherein the number of ventilation holes in the plurality of ventilation holes is 12 or more and 30 or less.

[0029] According to the ninth aspect of the present invention, by setting the number of ventilation holes in the plurality of ventilation holes to 12 or more and 30 or less, it is possible to introduce sufficient air into the interior while reducing the probability of ventilation holes being formed at the location where the adhesive layer is provided, thereby preventing the combustion ash of the adhesive from clogging the ventilation holes.

[0030] In a tenth aspect of the present invention, in the ninth aspect, the number of vent holes in the plurality of vent holes is 21 or less.

[0031] According to the tenth aspect of the present invention, by setting the number of ventilation holes in the plurality of ventilation holes to 12 or more and 21 or less, it is possible to introduce sufficient air into the interior while reducing the probability of ventilation holes being formed at the location where the adhesive layer is provided, thereby preventing the combustion ash of the adhesive from clogging the ventilation holes.

[0032] In an eleventh aspect of the present invention, in any one of the first to tenth aspects, the number of vent holes in the first vent hole is six or less.

[0033] According to the eleventh form of the present invention, by setting the number of ventilation holes in the first ventilation hole to six or less, it is possible to introduce sufficient air into the interior while reducing the probability of ventilation holes being formed at the location where the adhesive layer is provided, thereby preventing the combustion ash of the adhesive from blocking the ventilation holes.

[0034] In a twelfth aspect of the present invention, in any of the first to eleventh aspects, the ratio of the number of vent holes in the first vent hole to the total number of vent holes in the plurality of vent holes is less than 1 / 4.

[0035] According to the 12th form of the present invention, by making the ratio of the number of ventilation holes in the first ventilation hole to the total number of ventilation holes in the multiple ventilation holes less than 1 / 4, it is possible to introduce sufficient air into the interior while reducing the probability of ventilation holes being formed at the location where the adhesive layer is provided, and to prevent the combustion ash of the adhesive from blocking the ventilation holes.

[0036] In a thirteenth aspect of the present invention, in any one of the first to twelfth aspects, the plurality of vent holes are formed in two or more rows along the axial direction.

[0037] According to the thirteenth aspect of the present invention, by forming a plurality of ventilation holes in two or more rows along the axial direction, more air can be introduced into the interior compared to when a plurality of ventilation holes are formed in a single row. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a cross-sectional view showing a flavor-generating article to which a cylindrical body according to one embodiment of the present invention is applied. [Figure 2] FIG. 1 is a perspective view showing a cylindrical body according to an embodiment of the present invention. [Figure 3] 3 is a cross-sectional view of the cylindrical body taken along the arrow II in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view of the cylindrical body of FIG. 3, developed in the circumferential direction. [Figure 5] FIG. 2 is a development view showing a second sheet material of a cylindrical body according to one embodiment of the present invention. [Figure 6]FIG. 4 is another developed view showing the second sheet material of the cylindrical body according to one embodiment of the present invention. [Figure 7] FIG. 4 is another developed view showing the second sheet material of the cylindrical body according to one embodiment of the present invention. [Figure 8] FIG. 4 is another developed view showing the second sheet material of the cylindrical body according to one embodiment of the present invention. [Figure 9] 1 is a configuration diagram showing a cylindrical body manufacturing apparatus according to an embodiment of the present invention. [Figure 10] 10A and 10B are explanatory diagrams showing experimental results of humidification conditions in a cylindrical body manufacturing apparatus according to an embodiment of the present invention. [Figure 11] FIG. 10 is an explanatory diagram showing humidification conditions for each bonding pattern in the cylindrical body manufacturing apparatus according to one embodiment of the present invention. [Figure 12] FIG. 10 is an explanatory diagram showing the amount of adhesive applied to a cylindrical body according to an embodiment of the present invention in comparison with a conventional product. [Figure 13] FIG. 2 is an explanatory diagram showing various physical properties of the cylindrical body according to one embodiment of the present invention in comparison with a standard product and a conventional product. DETAILED DESCRIPTION OF THE INVENTION

[0039] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings described below, identical or corresponding components are designated by the same reference numerals, and redundant description will be omitted. The cylindrical body according to the present invention can be applied to a flavor-generating article used in, for example, a non-combustion type flavor inhaler for inhaling flavors without burning a material. The cylindrical body according to the present invention may also be applied to a combustion type smoking article.

[0040] Fig. 1 is a cross-sectional view showing a flavor-generating article to which a cylindrical body according to one embodiment of the present invention is applied. As shown in Fig. 1, flavor-generating article 10 includes tobacco-containing segment 11 and mouthpiece segment 12. Mouthpiece segment 12 includes cooling segment 13, center hole segment 14, and filter segment 15.

[0041] During use, the tobacco-containing segment 11 is heated and suction is applied from the end of the filter segment 15. The position of the center hole segment 14 is not limited to the position shown in Figure 1; for example, the positions of the center hole segment 14 and the filter segment 15 may be interchanged. Furthermore, the center hole segment 14 may be omitted from the flavor-generating article 10 shown in Figure 1.

[0042] The tobacco-containing segment 11 has a tobacco filler 210 containing tobacco and an aerosol source, and a tubular wrapper 220 that covers the tobacco filler 210. The tobacco filler 210 may further contain volatile flavoring ingredients, water, etc. There are no particular limitations on the size of the tobacco used as the filler or the method for preparing it.

[0043] The cooling segment 13 is composed of a cylindrical body 100. A plurality of ventilation holes 140 are formed in the cylindrical body 100 and a mouthpiece lining paper 400 (described later) concentrically in the circumferential direction of the cylindrical body 100, penetrating their wall surfaces. The ventilation holes 140 are holes for promoting the inflow of air from the outside when the user inhales, and this inflow of air cools the aerosol generated in the tobacco filler 210 and reduces the aerosol concentration. The diameter (diameter) of the ventilation holes 140 is not particularly limited, but may be, for example, 0.5 mm to 1.5 mm.

[0044] The center hole segment 14 is composed of a filling layer 310 having a hollow portion and a first inner plug wrapper 320 that covers the filling layer 310. The filling layer 310 may be, for example, a rod made of cellulose acetate fibers packed at a high density and hardened by adding a plasticizer containing triacetin.

[0045] The diameter of the hollow portion is not particularly limited, and may be, for example, 1.0 mm to 5.0 mm. Since the packed layer 310 has a high packing density of fibers, air and aerosol flow only through the hollow portion during inhalation, and hardly flow at all within the packed layer 310. By having the hollow portion in the packed layer 310, the amount of aerosol containing flavor components generated by heating the flavor-generating article 10 that is filtered can be reduced.

[0046] The filter segment 15 includes a filter medium 330 and a cylindrical second inner plug wrapper 340 that encases the filter medium 330. The filter medium 330 may be a solid plug filled with a porous material. By including a solid plug in the filter segment 15, the aerosol containing flavor components generated by heating the flavor-generating article 10 can be filtered, and the amount of aerosol delivered can be appropriately adjusted.

[0047] The center hole segment 14 and the filter segment 15 are connected to each other by an outer plug wrapper 350. The outer plug wrapper 350 may be, for example, a cylindrical piece of paper. The tobacco-containing segment 11, the cooling segment 13, and the connected center hole segment 14 and filter segment 15 are connected to each other by wrapping them with mouthpiece lining paper 400, the inner surface of which is coated with a glue such as a vinyl acetate glue.

[0048] The cylindrical body 100 shown in Fig. 1 will be described in detail below. Fig. 2 is a perspective view showing a cylindrical body according to one embodiment of the present invention. Fig. 3 is a cross-sectional view of the cylindrical body taken along arrow II shown in Fig. 2. Fig. 4 is a cross-sectional view of the cylindrical body of Fig. 3 developed in the circumferential direction.

[0049] As shown in Figures 2 to 4, the cylindrical body 100 comprises a first sheet-shaped material 110, a second sheet-shaped material 120, an adhesive layer 130, and ventilation holes 140. The first sheet-shaped material 110 and the second sheet-shaped material 120 have circular cross sections perpendicular to the axial direction. The second sheet-shaped material 120 is provided on the outer periphery of the first sheet-shaped material 110. The adhesive layer 130 is provided between the first sheet-shaped material 110 and the second sheet-shaped material 120, and bonds the first sheet-shaped material 110 and the second sheet-shaped material 120 to each other.

[0050] The first sheet-shaped material 110 and the second sheet-shaped material 120 may each be made of paper or cardboard, which improves the workability of the cylindrical body 100. The first sheet-shaped material 110 and the second sheet-shaped material 120 may each have an elliptical cross-sectional shape perpendicular to the axial direction.

[0051] Here, the first sheet-like material 110 and the second sheet-like material 120 are stacked with a staggered arrangement so that their circumferential ends do not overlap. The first sheet-like material 110 has a first main body portion 111 and a first extension portion 112 that extends from the first main body portion 111 in the circumferential direction relative to the opposing second sheet-like material 120. The first main body portion 111 is the portion that faces the second sheet-like material 120 in Figure 4.

[0052] The second sheet material 120 has a second main body portion 121 and a second extension portion 122 extending from the second main body portion 121 in the circumferential direction relative to the opposing first sheet material 110. The second main body portion 121 is the portion that faces the first sheet material 110 in Figure 4.

[0053] The adhesive layer 130 has a positioning adhesive layer 131 and a first seam adhesive layer 132 that bond the first main body portion 111 and the second main body portion 121 together, and a second seam adhesive layer 133 (seam adhesive layer) that bond the first extension portion 112 and the second extension portion 122 together. Note that the first seam adhesive layer 132 does not necessarily have to be provided, and the positioning adhesive layer 131 may function as the first seam adhesive layer 132.

[0054] The positioning adhesive layer 131, the first seam adhesive layer 132, and the second seam adhesive layer 133 may be made of a mixture of organic polymers such as modified starch, vinyl acetate, or ethylene vinyl acetate with alcohols and water. However, the positioning adhesive layer 131, the first seam adhesive layer 132, and the second seam adhesive layer 133 are not limited to the above and may be made of other adhesives.

[0055] The cylindrical body 100 is formed by applying a positioning adhesive layer 131, a first seam adhesive layer 132, and a second seam adhesive layer 133 to a second sheet-like material 120, overlaying the first sheet-like material 110, and then molding the resultant into a cylindrical shape. Here, the positioning adhesive layer 131 applied to the second sheet-like material 120 has an adhesive pattern in which positioning glue (adhesive) is applied in a linear pattern. Note that the positioning adhesive layer 131, the first seam adhesive layer 132, and the second seam adhesive layer 133 may be applied to the first sheet-like material 110 instead of the second sheet-like material 120.

[0056] A plurality of ventilation holes 140 are formed in the circumferential direction of the cylindrical body 100, penetrating the first sheet-like material 110 and the second sheet-like material 120. Here, the positioning adhesive layer 131 applied to the second sheet-like material 120 has an adhesive pattern in which positioning glue (adhesive) is applied in a linear pattern, so the plurality of ventilation holes 140 include first ventilation holes 141 in which the adhesive layer 130 is exposed on the inner surface of the ventilation hole 140, and second ventilation holes 142 in which the adhesive layer 130 is not exposed on the inner surface of the ventilation hole 140.

[0057] Specifically, the first ventilation hole 141 is formed through the first sheet-like material 110 and the second sheet-like material 120 together with any one of the positioning adhesive layer 131, the first seam adhesive layer 132, and the second seam adhesive layer 133. The second ventilation hole 142 is formed through the first sheet-like material 110 and the second sheet-like material 120 at a location where none of the positioning adhesive layer 131, the first seam adhesive layer 132, and the second seam adhesive layer 133 is provided.

[0058] In this way, the plurality of ventilation holes 140 have at least one first ventilation hole 141 where the adhesive layer 130 is exposed on the inner surface of the ventilation hole 140, and at least one second ventilation hole 142 where the adhesive layer 130 is not exposed on the inner surface of the ventilation hole 140, thereby reducing the probability that the ventilation hole 140 will be formed at the location where the adhesive layer 130 is provided, and suppressing the burning ash of the adhesive from clogging the ventilation hole 140. As a result, deterioration in the quality of the flavor-generating article 10 to which the cylindrical body 100 is applied can be suppressed.

[0059] Fig. 5 is a development view showing a second sheet material of a cylindrical body according to one embodiment of the present invention. As shown in Fig. 5, the second sheet material 120 has a positioning adhesive layer 131 on which two lines of positioning glue are applied in a straight line parallel to the axial direction.

[0060] In this way, the positioning adhesive layer 131 has an adhesive pattern in which two lines of positioning glue are applied in straight lines parallel to the axial direction, so the amount of adhesive applied can be reduced compared to when the positioning adhesive layer is applied over the entire surface. Also, the probability of the vent hole 140 being formed in the area where the adhesive layer 130 is provided is reduced, and the vent hole 140 can be prevented from being blocked by combustion ash from the adhesive.

[0061] The adhesive pattern of the positioning adhesive layer 131 is not limited to that shown in Fig. 5. Fig. 6 is another developed view showing the second sheet material of a cylindrical body according to one embodiment of the present invention. As shown in Fig. 6, the second sheet material 120 has a positioning adhesive layer 131 to which positioning glue is applied in a spiral shape along the axial direction.

[0062] In this way, the positioning adhesive layer 131 has an adhesive pattern in which the positioning glue is applied spirally along the axial direction, so that the amount of adhesive applied can be reduced compared to when the positioning adhesive layer is applied over the entire surface. Also, the probability of the vent hole 140 being formed in the area where the adhesive layer 130 is provided can be reduced, and the ash from the combustion of the adhesive can be prevented from blocking the vent hole 140.

[0063] 7 is another developed view showing a second sheet material of a cylindrical body according to one embodiment of the present invention. As shown in Fig. 7, the second sheet material 120 has a positioning adhesive layer 131 on which three lines of positioning glue are applied in a straight line parallel to the axial direction.

[0064] In this way, the positioning adhesive layer 131 has an adhesive pattern in which three lines of positioning glue are applied in straight lines parallel to the axial direction, which makes it possible to reduce the amount of adhesive to be applied compared to when the positioning adhesive layer is applied over the entire surface. Also, the probability of the vent hole 140 being formed in the area where the adhesive layer 130 is provided is reduced, making it possible to prevent the vent hole 140 from being blocked by combustion ash from the adhesive.

[0065] Figure 8 is another developed view showing a second sheet material of a cylindrical body according to one embodiment of the present invention. As shown in Figure 8, the second sheet material 120 has a positioning adhesive layer 131 on which three lines of positioning glue are applied in a straight line perpendicular to the axial direction. Note that two lines of positioning glue may be applied, or four or more lines of positioning glue may be applied.

[0066] In this way, the positioning adhesive layer 131 has an adhesive pattern in which three lines of positioning glue are applied in straight lines perpendicular to the axial direction, which makes it possible to reduce the amount of adhesive to be applied compared to when the positioning adhesive layer is applied over the entire surface.In addition, the probability of forming the vent hole 140 in the area where the adhesive layer 130 is provided is reduced, making it possible to prevent the vent hole 140 from being blocked by combustion ash from the adhesive.

[0067] Here, the number of ventilation holes 140 in the plurality of ventilation holes 140 is preferably 12 or more and 30 or less, and more preferably 21 or less. By making the number of ventilation holes 140 in the plurality of ventilation holes 140 12 or more and 30 or less, and more preferably 21 or less, it is possible to introduce sufficient air into the interior while reducing the probability that ventilation holes 140 will be formed in the locations where adhesive layers 130 are provided, and to prevent the ventilation holes 140 from being blocked by combustion ash from the adhesive.

[0068] Furthermore, the number of first ventilation holes 141 is preferably 6 or less. By setting the number of first ventilation holes 141 to 6 or less, it is possible to introduce sufficient air into the interior while reducing the probability that ventilation holes 140 will be formed at the locations where adhesive layer 130 is provided, and to prevent ventilation holes 140 from being blocked by combustion ash from the adhesive.

[0069] Furthermore, it is preferable that the ratio of the number of first vent holes 141 to the total number of the plurality of vent holes 140 is less than 1 / 4. By making the ratio of the number of first vent holes 141 to the total number of the plurality of vent holes 140 less than 1 / 4, it is possible to introduce sufficient air into the interior while reducing the probability that vent holes 140 will be formed at locations where adhesive layer 130 is provided, and to prevent ash from burning the adhesive from clogging vent holes 140.

[0070] The plurality of ventilation holes 140 may be formed in two or more rows along the axial direction. By forming the plurality of ventilation holes 140 in two or more rows along the axial direction, more air can be introduced into the interior compared to when the plurality of ventilation holes 140 are formed in one row.

[0071] In addition, by using the second sheet-like material 120 shown in Figures 5 to 8 to reduce the amount of adhesive applied, the adhesive components generated by heating or combustion from the tubular body 100 applied to the flavor-generating article or smoking article are reduced, thereby suppressing deterioration of the flavor and taste of the flavor-generating article or smoking article.

[0072] Furthermore, reducing the amount of adhesive applied reduces costs, and reducing the amount of adhesive residue adhering to the manufacturing equipment for the cylindrical body 100 reduces the risk of the manufacturing equipment being shut down, shortens the time required to clean the residue, and improves the productivity of the cylindrical body 100.

[0073] Next, a method for manufacturing the cylindrical body 100 will be described. Fig. 9 is a configuration diagram showing a cylindrical body manufacturing apparatus according to one embodiment of the present invention. In the cylindrical body manufacturing apparatus 1 shown in Fig. 9, a sheet material 24 of an appropriate width is drawn out in a conveying direction 34 from a bobbin (not shown) of a sheet material supplying device 22, and conveyed in the longitudinal direction via a plurality of direction-changing rollers 41.

[0074] The sheet-like material 24 is cut in the longitudinal direction in the cutting section 23. Specifically, the sheet-like material 24 is cut into a first sheet-like material 110 having a first width and a second sheet-like material 120 having a second width. The cut first sheet-like material 110 and second sheet-like material 120 are transported in parallel via a diverting roller 41 and separated from each other by a lateral transport roller 32.

[0075] After the second sheet material 120 has been diverted by the diverting roller 41, a positioning adhesive layer 131, a first seam adhesive layer 132 and a second seam adhesive layer 133 (see FIG. 4) are applied to the entire length of the second sheet material 120 by the gluing unit 25 (application step). Here, the positioning adhesive layer 131 has an adhesive pattern in which positioning glue (adhesive) is applied in a linear pattern (see FIGS. 5 to 8).

[0076] Next, the second sheet-shaped material 120 is moistened by the moistening nozzle 26 (moistening step). The moistening nozzle 26 sprays water onto the surface of the second sheet-shaped material 120 on which the positioning adhesive layer 131 has been applied. The moistening nozzle 26 may spray alcohol onto the second sheet-shaped material 120 instead of water, or may spray steam onto the second sheet-shaped material 120.

[0077] This makes the humidity at the areas where the positioning adhesive layer 131, the first seam adhesive layer 132 and the second seam adhesive layer 133 of the second sheet material 120 are applied equal to that at other areas, and when the second sheet material 120 is formed into a cylindrical shape in a later process, it can be deformed uniformly, resulting in a cylindrical body 100 with high circularity.

[0078] Meanwhile, the first sheet material 110 is conveyed while separated from the second sheet material 120, and its position is shifted laterally relative to the conveying direction by a position shifting unit 29. Thereafter, the first sheet material 110 and the second sheet material 120 are integrated by a pair of tension rollers 28 (adhesion process).

[0079] As a result, the first sheet-like material 110 and the second sheet-like material 120 are bonded together with their ends offset from each other so that they do not overlap in the width direction perpendicular to the longitudinal direction. Specifically, the first main body portion 111 and the second main body portion 121 are bonded together by a positioning adhesive layer 131 and a first seam adhesive layer 132 applied to the second sheet-like material 120 (see FIG. 4).

[0080] In addition, the cylindrical body manufacturing apparatus 1 may be provided with a sensor for detecting the widthwise ends of the first sheet material 110 and the second sheet material 120, and a control mechanism for controlling the amount of positional deviation between the first sheet material 110 and the second sheet material 120.

[0081] Next, the first sheet-like material 110 and the second sheet-like material 120, which have been bonded together and offset from each other, are transported to the forming device 30. In the forming device 30, an endless forming belt 43 is guided endlessly via a plurality of direction-changing rollers 41. The first sheet-like material 110 and the second sheet-like material 120 transported to the forming device 30 are pressed onto the forming belt 43 by a pressing section 44.

[0082] Thereafter, the first sheet-like material 110 and the second sheet-like material 120 are formed into a cylindrical continuous body 31 in a forming device 30 by a known method, for example, as described in JP 2018-121628 A (forming process). At this time, the first extending portion 112 and the second extending portion 122 are bonded to each other by a second seam adhesive layer 133 applied to the second sheet-like material 120 (see FIG. 4).

[0083] Next, the first sheet material 110 and the second sheet material 120 formed into the cylindrical continuous body 31 are heated by the heating section 37, thereby hardening the positioning adhesive layer 131, the first seam adhesive layer 132 and the second seam adhesive layer 133. The second sheet material 120 moistened by the moistening nozzle 26 is also dried in the heating section 37.

[0084] Next, the first sheet material 110 and the second sheet material 120 formed into the tubular continuous body 31 are cut to a predetermined length by the cutting unit 38 (cutting step), to form the tubular body 100. Note that in the tubular body manufacturing apparatus 1, the first sheet material 110 and the second sheet material 120 may be interchangeable.

[0085] Next, the cylindrical body 100 is incorporated into a semi-finished product such as a flavor-generating article or a smoking article, and then a laser beam is irradiated from the outer periphery of the cylindrical body 100 to the inner periphery, burning the material at the irradiated points, thereby forming multiple air holes 140 that penetrate the cylindrical body 100 intermittently around the entire circumference.

[0086] Next, the results of various experiments conducted using the cylindrical body manufacturing apparatus 1 will be described. First, experiments were conducted to find appropriate humidifying conditions for the humidifying nozzle 26. FIG. 10 is an explanatory diagram showing the experimental results of humidifying conditions in a cylindrical body manufacturing apparatus according to one embodiment of the present invention. Here, experiments were conducted by changing the humidifying conditions for the case where three lines of positioning glue were applied to the second sheet material 120 in straight lines parallel to the axial direction (see FIG. 7).

[0087] As shown in Figure 10, cylindrical bodies 100 were manufactured by changing the humidification conditions from level 1 to level 9 in terms of water amount, spray pressure, and distance from the humidification nozzle 26 to the second sheet material 120 (humidification nozzle distance).It was confirmed that level 6 (water amount 6.34 mg / piece, spray pressure 0.05 MPa, humidification nozzle distance 17 mm) was appropriate in terms of circularity and circumferential length.

[0088] Next, a cylindrical body 100 (see Figure 6) was manufactured using level 6 shown in Figure 10, in which positioning glue was applied spirally along the axial direction to the second sheet material 120, but the adhesion between the first extension portion 112 and the second extension portion 122 (see Figure 4) by the second seam adhesive layer 133 was not performed properly.

[0089] Therefore, experiments were conducted on a cylindrical body 100 (see FIG. 6) in which positioning glue was applied spirally along the axial direction to the second sheet-like material 120, while changing the amount of water. As a result, it was confirmed that a water amount of 28.20 mg / tube is appropriate for a cylindrical body 100 in which positioning glue was applied spirally. The humidification conditions for each adhesion pattern in the cylindrical body manufacturing apparatus 1 are shown in FIG. 11.

[0090] Next, experiments were conducted on a cylindrical body 100 (see Figure 6) in which positioning glue was applied in a spiral pattern along the axial direction to the second sheet-like material 120, and a cylindrical body 100 (see Figure 5) in which two lines of positioning glue were applied in a straight pattern parallel to the axial direction to the second sheet-like material 120, by varying the amount of application of the positioning adhesive layer 131.

[0091] As a result, it was confirmed that for the cylindrical body 100 to which the positioning glue was applied in a spiral, an application amount of 20 g / 500 m (4.8 mg / strand) was appropriate, and for the cylindrical body 100 to which two strands of positioning glue were applied, an application amount of 25 g / 500 m (3.0 mg / strand x 2) was appropriate. Figure 12 shows the results of comparing the application amount of the positioning adhesive layer 131 on the cylindrical body 100 with that of a conventional product.

[0092] As shown in Fig. 12, in the cylindrical body 100 in which the positioning glue is applied in a spiral shape, the amount of application of the positioning adhesive layer 131 can be reduced by 80% compared to the conventional product (application amount 100g / 500m (24mg / piece)). Also, in the cylindrical body 100 in which two strands of positioning glue are applied, the amount of application of the positioning adhesive layer 131 can be reduced by 75% compared to the conventional product.

[0093] Next, using the humidification conditions and application amount of the positioning adhesive layer 131 shown in Figures 11 and 12, a cylindrical body 100 (see Figure 6) in which the positioning glue was applied spirally along the axial direction to the second sheet material 120, and a cylindrical body 100 (see Figure 5) in which two lines of positioning glue were applied linearly parallel to the axial direction to the second sheet material 120 were manufactured, and various physical properties were measured. The results of comparing the various physical properties of the cylindrical body 100 with those of a standard product and a conventional product are shown in Figure 13.

[0094] Here, for the cylindrical body 100 with the positioning glue applied in a spiral shape and the cylindrical body 100 with two lines of positioning glue applied, the physical properties were measured immediately after the formation of the cylindrical body 100 and after 24 hours, taking into consideration the influence of humidification by the humidifying nozzle 26. The moisture value was also measured after one week.

[0095] 13, it was confirmed that immediately after the formation of the cylindrical body 100, the weight was the same as that of the conventional product, but the moisture content decreased over time, and the weight tended to become lighter. It was also confirmed that the moisture content decreased over time, and the values ​​of the circumference length and hardness also changed.

[0096] It was also confirmed that the circularity of both the cylindrical body 100 with the positioning glue applied in a spiral shape and the cylindrical body 100 with two strands of positioning glue applied was equivalent to that of the standard product. Furthermore, because the structure of the joint between the first extending portion 112 and the second extending portion 122 is the same as that of the conventional product, the joint peel strength of both the cylindrical body 100 with the positioning glue applied in a spiral shape and the cylindrical body 100 with two strands of positioning glue applied was equivalent to that of the conventional product.

[0097] Furthermore, by making the area of ​​the positioning adhesive layer 131 10% or more and 50% or less of the area of ​​the overlapping portion between the first main body portion and the second main body portion, poor adhesion between the first sheet-like material 110 and the second sheet-like material 120 is suppressed, and a cylindrical body with excellent circularity and little impact on flavor and smoking taste can be obtained.

[0098] Although the embodiments of the present invention have been described above, the above-described embodiments of the invention are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. Furthermore, the components described in the claims and specification may be combined or omitted to the extent that at least part of the above-described problems can be solved or at least part of the effects can be achieved. [Explanation of symbols]

[0099] 1... Cylindrical body manufacturing device 10...Flavor-generating items 11...Tobacco-containing segment 12...Mouthpiece segment 13...Cooling segment 14...Center hole segment 15...Filter segment 22...Sheet material supply device 23...Cutting section 24...Sheet material 25...Gluing section 26...Humidification nozzle 28...Tension roller pair 29... Position shifting part 30…Forming equipment 31...Cylindrical continuum 32...Lateral transport roller 34...Transport direction 37...Heating section 38…cutting section 41...Direction change roller 43...Molding belt 44...Pressing part 100...Cylindrical body 110...First sheet-like material 111...first main body part 112...First extension part 120...Second sheet material 121...Second main body part 122…Second extension part 130…Adhesive layer 131...positioning adhesive layer 132...1st seam adhesive layer 133…Second seam adhesive layer 140...Ventilation hole 141...First ventilation hole 142...Second ventilation hole 210...Tobacco filler 220...rapper 310…Filled bed 320...1st inner plug wrapper 330...filter medium 340...2nd inner plug wrapper 350...Outer plug wrapper 400...Mouthpiece lining paper

Claims

1. A cylindrical body, A first sheet-shaped material having a circular or elliptical cross-sectional shape perpendicular to the axial direction; a second sheet material provided on the outer periphery of the first sheet material, the second sheet material having a circular or elliptical cross section perpendicular to the axial direction; an adhesive layer provided between the first sheet material and the second sheet material, which adheres the first sheet material and the second sheet material to each other; a plurality of ventilation holes formed in the circumferential direction of the cylindrical body, each of the ventilation holes penetrating both the first sheet material and the second sheet material; The plurality of ventilation holes include at least one first ventilation hole in which the adhesive layer is exposed to an inner surface of the ventilation hole, and at least one second ventilation hole in which the adhesive layer is not exposed to an inner surface of the ventilation hole. Cylindrical body.

2. The cylindrical body according to claim 1, The first sheet material and the second sheet material are stacked with a shift between them so that their circumferential ends do not overlap, The first sheet of material has a first main body portion and a first extension portion extending from the first main body portion in a circumferential direction relative to the opposing second sheet of material, The second sheet material has a second main body portion and a second extension portion extending from the second main body portion in a circumferential direction relative to the opposing first sheet material, the adhesive layer includes a positioning adhesive layer that adheres the first body portion and the second body portion to each other, and a joint adhesive layer that adheres the first extension portion and the second extension portion to each other, The positioning adhesive layer has an adhesive pattern in which positioning glue is applied in a linear pattern. Cylindrical body.

3. The cylindrical body according to claim 2, The positioning adhesive is applied in two or more lines. Cylindrical body.

4. The cylindrical body according to claim 3, The positioning adhesive is applied in a linear pattern. Cylindrical body.

5. The cylindrical body according to claim 4, The positioning adhesive is applied in a straight line parallel to the axial direction. Cylindrical body.

6. The cylindrical body according to claim 4, The positioning adhesive is applied in a linear shape perpendicular to the axial direction. Cylindrical body.

7. The cylindrical body according to claim 2, The positioning glue is applied spirally along the axial direction. Cylindrical body.

8. The cylindrical body according to any one of claims 1 to 7, the first sheet-like material and the second sheet-like material are each paper; Cylindrical body.

9. The cylindrical body according to any one of claims 1 to 8, The number of the ventilation holes in the plurality of ventilation holes is 12 or more and 30 or less. Cylindrical body.

10. The cylindrical body according to claim 9, the number of vent holes in the plurality of vent holes is 21 or less; Cylindrical body.

11. The cylindrical body according to any one of claims 1 to 10, The number of the first ventilation holes is 6 or less. Cylindrical body.

12. The cylindrical body according to any one of claims 1 to 11, a ratio of the number of the first vent holes to the total number of the plurality of vent holes is less than ¼; Cylindrical body.

13. The cylindrical body according to any one of claims 1 to 12, The plurality of ventilation holes are formed in two or more rows along the axial direction. Cylindrical body.

14. A flavor-generating article having a cylindrical body described in any one of claims 1 to 13.

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