JP5939054B2 - Carton for sanitary paper storage and sanitary paper with carton - Google Patents

Description

  The present invention relates to a carton for storing sanitary paper such as tissue paper. More specifically, the present invention relates to a sanitary paper storage carton and a carton-containing sanitary paper that can prevent a large amount of ants or the like from entering the carton.

  Sanitary paper such as tissue paper may be marketed in a state of being stored in a carton like a box tissue (sanitary paper with a carton). This carton has a cut line (perforation, etc.) for forming a take-out opening on the top surface part. When this cut line is broken and the carton is opened, the sanitary paper stored in the carton can be taken out. It is configured.

  There was a problem that ants gathered on such sanitary paper with cartons and the ants entered the carton. This ant is a black ant with a body length of about 2 mm, and has been confirmed to be a “Ruriari” inhabiting in western Japan. It is said that such a problem does not occur due to the ingredients in the sanitary paper attracting ants, but due to the habit of rugliari that nests in a narrow gap such as the back of the bark. That is, the above problem is considered to occur because the structure of sanitary paper with carton in which sanitary paper made of wood pulp is accumulated in a dark carton is similar to the structure of the back of the bark, etc. ing.

  As a countermeasure for such a problem, it has been proposed to use an anti-anticide. For example, a tissue storage box is manufactured using glue (glue) containing a termite-proofing agent or printing ink (Patent Document 1), or the bottom surface of the carton is provided with a termite-proofing cover containing a termiticide on the surface or inside thereof. (Patent Document 2) has been proposed.

JP 2001-122347 A JP 2010-047282 A

  However, even when the termite-proofing agent is used as described in Patent Document 1 or 2, it has not been possible to effectively prevent a situation where an ant enters the carton.

  The present invention has been made to solve such problems of the prior art. That is, the present invention provides a sanitary paper storage carton and a carton-containing sanitary paper that can prevent a large amount of ants or the like from entering the carton.

  The inventor has intensively studied to solve the above problems. As mentioned above, the entry of ants such as luliari into the carton is dark in the carton, and the structure of the sanitary paper containing the carton resembles the structure of the back of the bark, etc. It is thought that it is done. So, for example, if one ant enters the carton, a large number of ants are called into the carton to build a nest in the carton. It develops into a situation. On the contrary, if the inside of the carton is not suitable for ant nest building, even if one ant intrudes into the carton, the ant that has entered the carton cannot call another ant. It is speculated that it will not develop into a situation where a large number of ants are in the carton.

  As a method for making the inside of the carton unsuitable for ant nest building, for example, it is conceivable to increase the amount of light collected from the opening of the opened carton to brighten the inside of the carton. In order to increase the amount of light collected from the carton outlet, it is necessary to enlarge the carton outlet. However, if the outlet is enlarged, dust and the like easily enter from the outlet of the carton. Therefore, another countermeasure is required to prevent the dust and the like from entering. Conventionally, a window film having a slit for taking out sanitary paper is pasted on the inside of the surface on which the take-out port is formed. This window film prevents entry of dust and the like, and takes out sanitary paper to the outside. At the same time, a technique for preventing the pop-up sanitary paper from falling into the box due to friction between the slits of the film has been proposed. However, since the window film is a flexible sheet such as polyethylene film, if the outlet of the carton is enlarged, the central part of the window film hangs down in the carton, and as a result, the pop-up sanitary paper cannot be held in its posture. , Sanitary paper falls and is difficult to remove.

  In view of this, the window film has a configuration in which the bending rigidity of at least the portion attached to the inward surface of the top surface portion in the outer peripheral region surrounding the central region is higher than the bending rigidity of the central region where the slit is formed. Thus, the inventors have conceived that the above problem can be solved, and have completed the present invention. That is, by adopting the above configuration, in order to create an environment that is not suitable for making ant nests in the carton, the carton outlet can be formed large, and as described above, the carton outlet can be enlarged. Even if it does, it becomes difficult for the center part of a window film to hang down in a carton, and also taking out of the sanitary paper from the slit formed in the window film becomes easy. According to the present invention, the following sanitary paper storage carton and carton-containing sanitary paper are provided.

[1] A top surface portion, a bottom surface portion, a pair of side surface portions, and a pair of wife surface portions, and an internal space that encloses sanitary paper is formed by the top surface portion, the bottom surface portion, the side surface portions, and the wife surface portion, A carton body in which an annular outlet forming cut line is formed on the top surface portion, and a cut portion partitioned by the outlet forming cut line is formed on the top surface portion, and for taking out the sanitary paper A slit is formed in the central region, and a transparent window film pasted on the inward surface of the top surface portion so as to cover the cut portion, and the window film has the central region in which the slit is formed The bending rigidity of at least a portion attached to the inward surface of the top surface portion in the outer peripheral region surrounding the central region is higher than the bending rigidity of the top surface portion. To, the ratio of the cutout area S2 (S2 / S1 × 100) is 30 to 75% der Ru sanitary paper storage carton.

[ 2 ] The portion of the window film attached to at least the inward surface of the top surface portion is partially made of a laminate of a plurality of films, and the bending rigidity of the portion made of the laminate of the plurality of films is The sanitary paper storage carton according to [1 ], which is higher than the bending rigidity of the central region where the slit is formed.

[ 3 ] A sanitary paper bundle in which a plurality of sanitary papers are folded, and the sanitary paper storage carton described in [1] or [2] , and the internal space of the sanitary paper storage carton includes: A sanitary paper containing a carton in which the sanitary paper bundle is enclosed.

  The sanitary paper storage carton and the sanitary paper with a carton of the present invention do not cause inconveniences such as the central part of the window film hardly hangs down in the carton and the sanitary paper is difficult to take out even if the exit of the carton is enlarged. , A large amount of ants or the like can be prevented from entering the carton.

It is a perspective view showing typically one embodiment of the sanitary paper storage carton of the present invention. It is a perspective view which shows typically the use condition of the sanitary paper storage carton shown in FIG. 1A. It is a top view which shows typically the top | upper surface part of the sanitary paper storage carton shown to FIG. 1B. It is a top view which shows typically the inward surface of the top | upper surface part of the sanitary paper storage carton shown in FIG. 1B. It is a top view which shows typically the window film used for one Embodiment of the sanitary paper storage carton of this invention. It is a top view which shows typically the carton blank which is an intermediate body of the sanitary paper storage carton shown to FIG. 1A. It is a back view which shows typically the back surface of the carton blank shown to FIG. 3A. It is a perspective view which shows typically the process (square tube-shaped carton assembly process) which manufactures the sanitary paper storage carton shown in FIG. 1A. It is a perspective view which shows typically the process (sanitary paper bundle storage process) of manufacturing the sanitary paper storage carton shown in FIG. 1A. It is a perspective view which shows typically the process (carton assembly process) which manufactures the sanitary paper storage carton shown to FIG. 1A.

  Hereinafter, embodiments for carrying out the sanitary paper storage carton and the carton-containing sanitary paper of the present invention will be specifically described with reference to the drawings. However, the present invention broadly encompasses sanitary paper storage cartons and the like having the invention-specific matters, and is not limited to the following embodiments.

(1) Carton for storing sanitary paper:
First, an embodiment of the sanitary paper storage carton of the present invention will be described. The sanitary paper storage carton according to this embodiment includes a carton body 12 and a transparent window film 14 like the sanitary paper storage carton 1 shown in FIGS. 1A to 1D. FIG. 1A is a perspective view schematically showing one embodiment of a sanitary paper storage carton of the present invention. FIG. 1B is a perspective view schematically showing a use state of the sanitary paper storage carton 1 shown in FIG. 1A. The use state of the sanitary paper storage carton 1 shown in FIG. 1B refers to the top surface portion of the carton body 12 by breaking the cut line 10 for forming the outlet of the sanitary paper storage carton 1 and cutting the cut portion 22. 2 is a state in which an outlet 18 is formed. FIG. 1C is a plan view schematically showing the top surface portion of the sanitary paper storage carton shown in FIG. 1B. FIG. 1D is a plan view schematically showing the inward surface of the top surface portion of the sanitary paper storage carton shown in FIG. 1B.

  The carton body 12 has a top surface portion 2, a bottom surface portion 4, a pair of side surface portions 6 (6a, 6b), and a pair of end surface portions 8 (8a, 8b). In such a carton body 12, an internal space for enclosing sanitary paper is formed by the top surface portion 2, the bottom surface portion 4, the side surface portion 6, and the end surface portion 8. Further, the top surface portion 2 of the carton body 12 is formed with a cutout portion 22 partitioned by a cutout wire 10 for taking out the outlet.

  The window film 14 may be configured to be transparent so as to transmit light, and is not limited to being colorless and transparent, and may be colored and transparent, but is preferably colorless and transparent. As shown in FIG. 2, the window film 14 has a slit 16 for taking out sanitary paper in a central region 32 of the window film 14. And this window film 14 is affixed on the inward surface of the top | upper surface part 2 of the carton main body 12 so that the cutting part 22 may be covered, as shown to FIG. 1A-FIG. 1D. That is, the window film 14 is affixed to the inward surface of the top surface 2 so as to cover at least a range defined by the cut-out line 10 for forming the outlet. The slit 16 of the window film 14 is formed in a portion (exposed portion) exposed to the external space from the outlet 18 when the sanitary paper storage carton 1 is opened. FIG. 2 is a plan view schematically showing a window film used in one embodiment of the sanitary paper storage carton of the present invention.

  In the sanitary paper storage carton 1 of the present embodiment, the window film 14 has at least the top surface portion 2 in the outer peripheral region 34 surrounding the central region 32 as compared with the bending rigidity of the central region 32 in which the slits 16 are formed. It is comprised so that the bending rigidity of the site | part affixed on the inward surface may become high. The boundary between the central region 32 and the outer peripheral region 34 is preferably set between the inner peripheral edge of the outlet 18 and the slit 16.

  By configuring in this way, even if the size of the outlet 18 of the carton body 12 is increased, the central portion of the window film 14 (for example, the central region 32 of the window film 14) is unlikely to hang down into the carton body 12. . Furthermore, since the bending rigidity of the central region 32 where the slits 16 are formed is lower than the bending rigidity of the outer peripheral region 34, it becomes easy to take out sanitary paper from the slits 16 formed in the window film 14. As described above, by increasing the size of the outlet 18 of the carton body 12, the amount of light collected from the outlet 18 of the carton body 12 through the window film 14 can be increased. Therefore, it is possible to create an environment that is not suitable for making ant nests, and to prevent a large amount of ants from entering the carton body 12.

  The central region 32 where the slit 16 of the window film 14 is formed refers to a central region of the window film 14 including the slit 16 and the vicinity of the slit 16. The central region 32 is preferably located in a region where the outlet 18 of the carton body 12 is formed. On the other hand, the outer peripheral area 34 of the window film 14 refers to an outer area surrounding the central area 32 of the window film 14. It is preferable that the outer peripheral region 34 includes at least a portion where the window film 14 is attached to the inward surface of the top surface 2. In the sanitary paper storage carton 1 according to the present embodiment, the window film 14 is difficult to bend because the portion of the outer peripheral area 34 of the window film 14 has a high bending rigidity at the inward surface of the top surface 2. Therefore, as described above, the central portion of the window film 14 is unlikely to hang down into the carton body 12, and there is no inconvenience that it becomes difficult to take out sanitary paper. That is, when the central portion of the window film hangs down in the carton body, the popped-up sanitary paper cannot be held in that posture, and the sanitary paper falls down and is difficult to take out, but such inconvenience does not occur. The boundary between the central region 32 and the outer peripheral region 34 is preferably set between the inner peripheral edge of the outlet 18 and the slit 16 in order to make it difficult for the central portion of the window film 14 to hang down into the carton body 12.

  Bending rigidity means the degree of difficulty of dimensional change (flexure deformation) with respect to bending force. For example, in the case of “the bending rigidity of the other part is higher than that of the one part”, when the bending force is applied, the dimensional change of the other part rather than the dimensional change (deflection amount) of the one part. (Bending amount) decreases.

  Hereinafter, the configuration of the sanitary paper storage carton 1 of the present embodiment will be described in more detail for each component.

(1-1) Carton body:
The carton main body 12 is a box having six panels, ie, a top surface portion 2, a bottom surface portion 4, a pair of side surface portions 6, and a pair of end surface portions 8, and is configured in a hexahedral shape (cuboid shape). However, the shape of the carton body 12 is not limited to a rectangular parallelepiped shape, and may be a cubic shape, for example.

  In the carton body 12, an internal space for enclosing sanitary paper is formed by the top surface portion 2, the bottom surface portion 4, the side surface portion 6, and the end surface portion 8. Sanitary paper is stored in this internal space.

  The carton body 12 is generally assembled by bending. Therefore, it is preferable to use a paper material such as cardboard as a constituent material. As these paper materials, those produced using wood pulp, waste paper or the like as a raw material can be suitably used.

(1-1a) Cut-out line for outlet formation:
In the sanitary paper storage carton 1 shown in FIGS. 1A to 1D, an annular outlet forming cut line 10 is formed on the top surface portion 2 of the carton body 12. The top surface 2 is formed with a cut portion 22 defined by the cut-out line 10 for forming the outlet. The cut-out wire 10 for forming the outlet is broken and the cut-out portion 22 is cut, whereby the outlet 18 is formed in the top surface portion 2 of the carton body 12.

  Here, “annular” means a closed shape surrounding a certain region. That is, the shape is not limited to an annular shape, and may be an elliptical shape, an oval shape, a rectangular shape, a rhombus shape, other polygonal shapes, or the like. For example, in the carton body 12 shown in FIGS. 1A to 1D, the outlet forming cut line 10 is formed in a closed shape surrounding the substantially rectangular cut portion 22 on the top surface portion 2. In general, the carton body 12 is formed in a rectangular parallelepiped shape, and the top surface portion is often rectangular. Therefore, the shape of the cutout portion 22 is preferably a horizontally long shape along the longitudinal direction of the top surface portion 2.

As described above, the sanitary paper storage carton 1 of the present embodiment is less likely to hang down in the carton body 12 at the center portion of the window film 14. For this reason, in the sanitary paper storage carton 1 according to the present embodiment, the size of the cut-out portion 22 defined by the outlet forming cut line 10 is larger than the conventional sanitary paper storage carton. can do. For example, in a conventional sanitary paper storage carton, if the area of the cut-out part is increased, the central part of the window film hangs down within the carton body, the sanitary paper that pops up cannot be held in its posture, and the sanitary paper falls down and is taken out. The inconvenience that it becomes difficult arises. In order to make it difficult for ants to make a nest in the carton body 12, it is preferable to increase the amount of light collected from the outlet 18 through the window film 14. For this reason, in the sanitary paper storage carton 1 of the present embodiment, the ratio of the area S2 of the cutout portion 22 (in other words, the area of the outlet 18) to the area S1 of the top surface portion (S2 / S1 × 100). There, Ru 30-75% der.

  The outlet forming cut line 10 is not limited to a perforation, and may be one in which relatively long cuts (slits) are intermittently arranged. In addition, a break line for unsealing where the cut line called a zipper is bent into a bowl shape (see page 281 of the packaging industry well-known and commonly used techniques, issued on December 20, 1978) and double perforations It may be.

(1-2) Window film:
The sanitary paper storage carton 1 illustrated in FIGS. 1A to 1D includes a window film 14 attached to an inward surface of the top surface portion 2 so as to cover the cutout portion 22. The window film 14 can prevent external dust and foreign matter from adhering to the sanitary paper stored in the sanitary paper storage carton 1.

  The window film 14 is made of, for example, plastics such as polyethylene, polypropylene, polyvinyl chloride, polyester, and polyvinyl alcohol; printing paper such as glassine paper, kraft paper, Kent paper, and Indian paper, paper such as calligraphy paper, wrapping paper, and processing base paper; Or the like.

  “Attached so as to cover the cutout portion 22” means that the area of the window film 14 is larger than the area of the cutout portion 22, and the window film 14 is attached at a position where it overlaps with the whole cutout portion 22. It means that it is attached. The window film 14 is affixed to the inward surface of the top surface portion 2 with an adhesive such as hot melt. The shape of the bonded portion to which the window film 14 and the inward surface of the top surface portion 2 are bonded is not particularly limited. For example, an annular bonded portion may be disposed so as to surround the cut portion 22, An adhesive portion may be intermittently disposed around the portion 22.

  The shape of the window film 14 is not particularly limited. However, since the cut portion 22 (and thus the outlet) is often formed in a horizontally long shape, the cut portion 22 is preferably rectangular.

  The window film 14 is affixed to the inward surface of the top surface portion 2 of the sanitary paper storage carton 1 by, for example, a method such as adhesion using an adhesive or double-sided tape, heat fusion, or the like.

  The window film 14 is formed with a slit 16 for taking out sanitary paper. The slit 16 makes it difficult for external dust and foreign matter to enter the sanitary paper storage carton 1 even after the sanitary paper storage carton 1 is opened. Further, the pop-up sanitary paper can be prevented from falling into the internal space of the sanitary paper storage carton 1.

  The shape of the slit 16 is not particularly limited. However, it is preferable to form linearly like the slit 16 shown in FIG. The formation position of the slit 16 is not particularly limited. However, it is preferably formed in a portion (exposed portion) exposed to the external space from the outlet 18 of the sanitary paper storage carton 1, and the slit 16 of the sanitary paper storage carton 1 shown in FIGS. 1A to 1D. It is preferable that it is formed in the center part of the exposed part. The area including the slit 16 and the vicinity of the slit 16 is the central area 32 of the window film 14. In the sanitary paper storage carton 1 of the present embodiment, the bending rigidity of the central area 32 of the window film 14 is the window film 14. 14 is lower than the bending rigidity of the part pasted on the inward surface of the top surface portion 2 of the outer peripheral region 34. For this reason, when taking out the sanitary paper, the resistance when a finger is inserted into the slit 16 of the window film 14 is reduced, and the sanitary paper can be taken out from the slit 16 of the window film 14 satisfactorily. For example, if the bending rigidity of the entire window film 14 including the central region 32 of the window film 14 is increased, the window film 14 can be prevented from drooping, but the resistance when a finger is inserted into the slit 16 is also reduced. It becomes large and it becomes difficult to take out sanitary paper. Further, when the sanitary paper is pulled out from the slit 16, the sanitary paper may be torn.

  Further, since the outlet 18 is often formed in a horizontally long shape, the slit 16 is preferably formed in a linear shape along the longitudinal direction of the exposed portion.

  In the sanitary paper storage carton 1 of the present embodiment, the bending rigidity of the central region 32 of the window film 14 is configured to be relatively low. Thus, it is preferable that the region within 20 mm from the position where the slit 16 is formed is configured so that the bending rigidity is lower than the above-described portion where the bending rigidity is increased. Further, it is more preferable that at least the region within 10 mm is configured so that the bending rigidity is lower than the above-described portion where the bending rigidity is increased. With this configuration, the bending rigidity of a region within a certain range from the position where the slit 16 is formed is reduced, and the sanitary paper can be easily taken out. In addition, when it is comprised so that the bending rigidity of the window film 14 in the area | region within 20 mm from the position where the slit 16 was formed inside the inner peripheral edge of the taking-out opening 18 may be the said slit 16. It is preferable that the bending rigidity is higher in all the regions over 20 mm from the formed position than in the region where the bending rigidity is low (that is, the region within 20 mm).

  In addition, the window film 14 is disposed in the outlet 18 in a direction from the portion pasted on the inward surface of the top surface portion (that is, the adhesion portion of the window film 14) toward the central region 32 where the slit 16 is formed. The bending rigidity of the region between the peripheral edge and the slit 16 and at least 30 mm or more may be high. With such a configuration, the bending rigidity of the annular region surrounding the central region 32 in the outer peripheral region 34 is increased, and deformation (sagging) of the window film 14 can be effectively prevented.

  About the area | region where the bending rigidity of the window film 14 becomes high, it can form by the following method, for example. First, as a first method, a method of partially curing the window film 14 by partially heating the region where the bending rigidity of the window film 14 is increased using a heat roll can be given. In addition, as a second method, a method of increasing the bending rigidity relative to the central region 32 as a laminated structure in which the bending rigidity of the window film 14 is a laminated structure in which a plurality of films are stacked. Can do. Moreover, the method of shape | molding the window film 14 partially thickly can be mentioned as a 3rd method. By such a method, the window film 14 configured to have higher bending rigidity than that of the central region 32 in at least a part of the outer peripheral region 34 surrounding the central region 32 where the slits 16 are formed can be easily produced. can do.

  The window film 14 preferably has a bending rigidity of at least 5 times, more preferably 7 to 10 times, at least a portion attached to the inward surface of the top surface portion as compared with the central region 32. If the bending rigidity of the portion pasted on the inward surface of the top surface portion is less than five times that of the central region 32, the sag of the window film 14 may not be sufficiently suppressed. Further, when sufficient bending rigidity is provided to suppress the drooping of the window film 14, the bending rigidity of the central region 32 is also higher than that, so it may be difficult to take out sanitary paper from the slit. .

(2) Sanitary paper in cartons:
Next, an embodiment of the sanitary paper with carton according to the present invention will be described. The sanitary paper with a carton according to the present embodiment includes a sanitary paper bundle in which a plurality of sanitary papers are folded, and an embodiment of the sanitary paper storage carton according to the present invention (for example, sanitary paper storage shown in FIGS. 1A to 1D). Carton 1). Thus, the sanitary paper with a carton according to the present embodiment is a sanitary paper with a carton in which a bundle of sanitary paper is sealed in the internal space of the carton for storing sanitary paper.

  “Sanitary paper” refers to disposable paper, such as tissue paper (face wipes, decorative paper, etc.), dust paper, paper towels (kitchen paper, etc.), toilet paper (excluding rolls), and cotton (paper cotton). It means paper (for example, see Paper Pulp Technology Handbook 5th Edition, page 459, published on January 30, 1992, edited and published by the Paper Pulp Technology Association). In addition, “sanitary paper” includes multi-ply sanitary paper in which a plurality of sanitary papers are combined into one set.

  The “sanitary paper bundle” is a bundle (aggregate) of sanitary paper obtained by folding a plurality of sanitary papers. The folding structure is not particularly limited. However, a sanitary paper bundle having a structure in which a plurality of sanitary papers are continuously laminated by folding one sanitary paper and folding the other sanitary paper between the folded portions. preferable. In the sanitary paper bundle having such a structure, by taking out the uppermost sanitary paper, a part of the sanitary paper of the next layer sandwiched between them protrudes from the outlet, and the sanitary paper can be easily taken out. There is an advantage (so-called pop-up method).

(3) Manufacturing method:
Next, the manufacturing method of the sanitary paper with a carton of this embodiment is demonstrated. In the description of the method for producing the sanitary paper with cartons, the method for producing the sanitary paper storage carton of this embodiment will also be described.

(3-1) Production of carton blank:
First, the sanitary paper storage carton can be manufactured by the following method using a carton blank 112 as an intermediate as shown in FIGS. 3A and 3B.

  The “carton blank 112” is made of a paper material like the carton blank 112 shown in FIGS. 3A and 3B, and includes a top surface portion corresponding portion 102, a bottom surface portion corresponding portion 104, a pair of side surface portion corresponding portions 106, and at least a pair of pairs. This is an intermediate body for forming the sanitary paper storage carton 1 having the end face equivalent portion 108 and the top surface equivalent portion 102 having the outlet forming cut line 10 formed therein.

  In the sanitary paper with a carton and the carton for storing sanitary paper according to the present embodiment, “in comparison with the bending rigidity of the central region in which the slit is formed, it is applied to at least the inward surface of the top surface portion in the outer peripheral region surrounding the central region. Since the window film configured to increase the bending rigidity of the portion to be attached is used, the size of the cut portion 22 surrounded by the cut-out line 10 for forming the outlet is larger than that of the conventional carton blank. can do.

  The “top surface equivalent portion 102”, “bottom surface portion equivalent portion 104”, “side surface portion equivalent portion 106”, and “wife surface portion equivalent portion 108” are the sanitary paper storage cartons when assembled into the sanitary paper storage carton 1. 1 is a top surface portion 2, a bottom surface portion 4, a side surface portion 6, and a wife surface portion 8. Note that “at least a pair of wife face portion equivalent portions 108” means that the wife face portion 8 may be formed by a plurality of pairs of wife face portion equivalent portions 108. For example, the carton blank 112 shown in FIGS. 3A and 3B forms the end face 8 of the sanitary paper storage carton 1 by a pair of top outer flaps 130, a pair of bottom outer flaps 132, and two pairs of side inner flaps 134. Is.

(3-2) Production of window film:
Next, the window film 14 is produced. The window film 14 is made of, for example, plastics such as polyethylene, polypropylene, polyvinyl chloride, polyester, and polyvinyl alcohol; printing paper such as glassine paper, kraft paper, Kent paper, and Indian paper, paper such as calligraphy paper, wrapping paper, and processing base paper; Or the like.

  The window film 14 has a higher bending stiffness at least at a portion attached to the inward surface of the top surface portion 2 in the outer peripheral region surrounding the central region than the bending stiffness of the central region where the slit 16 is formed. To do. For example, when the material of the window film 14 is the above-described plastic or the like, a heat treatment is performed on a portion attached to the inward surface of the top surface portion 2 of the window film 14, and the portion subjected to the heat treatment is cured. Is preferred. Thereby, the bending rigidity of the site | part affixed on the inward surface of the top | upper surface part 2 of the window film 14 can be made high. In addition, the region where the bending rigidity of the window film 14 is increased may be a laminated structure in which a plurality of films are stacked, and the bending rigidity may be relatively increased. When the laminated structure described above is employed, it is effective for both the window film 14 made of plastic and the window film 14 made of paper.

(3-3) Window pasting process:
The window pasting step is a step of pasting the window film 14 on the inward surface of the top surface portion corresponding portion 102 in the carton blank 112 so as to cover the cut portion corresponding portion. In the carton blank 112 shown in FIGS. 3A and 3B, the window film 14 is attached to the inward surface of the top surface portion corresponding portion 102 of the carton blank 112 via the adhesive coating portion 136.

  For example, as a method of attaching the window film 14, for example, an adhesive such as hot melt is applied to the inward adhesive coating portion 136 in the top surface equivalent portion 102, and the adhesive coating portion 136 is passed through. The method of sticking the window film 14 can be mentioned.

  In the carton blank 112 shown in FIGS. 3A and 3B, L-shaped adhesive coating portions 136 are formed at the four corners of the window film 14, respectively, and linearly on both side edges in the longitudinal direction of the window film 14. The adhesive coating portions 136 are formed in two places each. In addition, the site | part comprised so that the bending rigidity of the window film 14 may become high will be affixed on the inward surface in the top surface part equivalent part 102 through the said adhesive agent coating part 136. FIG.

(3-4) Square tubular carton assembly process:
As shown in FIG. 4A, the rectangular tubular carton assembly process is a process of assembling the rectangular tubular carton 138 by bending and joining the carton blank 112.

  The “square cylindrical carton 138” is a structure in which the top surface equivalent portion 102, the bottom surface equivalent portion 104, and the pair of side surface equivalent portions 106 have four sides, and an internal space surrounded by the four sides is formed. “Square tubular carton 138” includes one in which one end face corresponding portion 108 is bent and joined, and one end opening is closed.

  For example, in the carton blank 112 shown in FIGS. 3A and 3B, the inner side flap 134 extends from the end edge of the side surface portion corresponding portion 106 via a fold line, and the fold line extends from the end edge of the top surface portion corresponding portion 102. The outer top surface flap 130 is extended through the bottom surface, and the bottom outer surface flap 132 is extended from the end edge of the bottom surface equivalent portion 104 via the folding line. Further, a side joining margin 140 is extended from one side edge of the bottom surface equivalent portion 104 via a fold line.

  Such a carton blank 112 can be assembled into a rectangular cylindrical carton 138 by bending each fold line and joining the side joining margin 140 and the side part equivalent part 106.

  In the “square tubular carton 138”, the end face corresponding portion 108 is not joined, and an end opening is formed. In the sanitary paper bundle inserting step of the next process, the sanitary paper bundle 142 is inserted from the end opening. Note that the “square tube-shaped carton 138” here includes one in which one end face corresponding portion 108 is bent and joined and one end opening is closed.

(3-5) Sanitary paper bundle insertion process:
The sanitary paper bundle inserting step is a step of inserting the sanitary paper bundle 142 from the end opening of the square tubular carton 138 as shown in FIG. 4B.

(3-6) Carton assembly process:
In the carton assembling step, as shown in FIG. 4C, the end face corresponding portion 108 of the rectangular tubular carton 138 is bent and joined, the end opening of the rectangular tubular carton 138 is closed, and the sanitary paper storage carton 1 is assembled. It is a process.

  For example, the rectangular carton 138 shown in FIG. 4C can form a pair of end faces by bending the inner side flap 134 and bending the bottom outer flap 132 and the top outer flap 130 and then joining them. . By doing so, the rectangular tubular carton is made up of the top surface portion 2, the bottom surface portion 4, the pair of side surface portions 6 (6a, 6b) and the pair of wife surface portions 8 (8a, 8b) as shown in FIGS. 1A to 1D. The sanitary paper storage carton 1 can be assembled.

  The sanitary paper storage carton of the present invention can be suitably used as a carton for storing sanitary paper such as tissue paper and kitchen towels.

1: Carton for storing sanitary paper, 2: Top surface portion, 4: Bottom surface portion, 6, 6a, 6b: Side surface portion, 8, 8a, 8b: Wife surface portion, 10: Cut-out line for taking out outlet, 12: Carton body , 14: window film, 16: slit, 18: outlet, 22: cutout portion, 32: central region, 34: outer peripheral region, 102: top surface portion, 104: bottom surface portion, 106: side surface portion , 108: Wife surface equivalent part, 112: Carton blank, 130: Top outer flap, 132: Bottom outer flap, 134: Side flap, 136: Adhesive coating part, 138: Square tubular carton, 140: Side Bonding cost, 142: Sanitary paper bundle.

Claims (3)

There is a top surface portion, a bottom surface portion, a pair of side surface portions, and a pair of wife surface portions, and an inner space that encloses sanitary paper is formed by the top surface portion, the bottom surface portion, the side surface portions, and the wife surface portion. A carton body in which an annular take-out forming cut line is formed, and the top surface portion is formed with a cut-out section partitioned by the take-out forming cut line;
A slit for taking out the sanitary paper is formed in a central region, and a transparent window film pasted on the inward surface of the top surface portion so as to cover the cut portion,
In the window film, the bending rigidity of at least a portion attached to the inward surface of the top surface portion in the outer peripheral region surrounding the central region is higher than that of the central region where the slit is formed. Configured as
A sanitary paper storage carton having a ratio (S2 / S1 × 100) of the area S2 of the cutout portion to the area S1 of the top surface portion is 30 to 75%. The portion of the window film that is affixed to at least the inward surface of the top surface portion is partially composed of a laminate of a plurality of films, and the slit is formed by the bending rigidity of the portion that is composed of the laminate of the plurality of films. The sanitary paper storage carton according to claim 1, wherein the sanitary paper storage carton is higher than the bending rigidity of the center region. A bundle of sanitary paper in which a plurality of sanitary papers are folded,
A sanitary paper storage carton according to claim 1 or 2 ,
A sanitary paper containing a carton in which the sanitary paper bundle is enclosed in the internal space of the sanitary paper storage carton.

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