JP2021075330A - Manufacturing method of packaging box, packaging box, manufacturing method of blank, and blank - Google Patents

Abstract

To secure sufficient adhesive strength even when using a blank sheet having a surface that has problems in adhesiveness as a material of a packaging box.SOLUTION: In a manufacturing method of a packaging box using a blank sheet obtained by forming a vapor deposition film layer or a metal layer on a surface of a base paper sheet, the method comprises the steps of: thermally welding a welded paper sheet obtained by forming a paper layer on its front surface and forming a resin layer on its back surface in an area where an adhesive for sealing the packaging box is coated, in an area where a blank on the blank sheet surface is formed; and assembling the packaging box using the blank cut out of the blank sheet.SELECTED DRAWING: Figure 6

Description

The present invention relates to a method for manufacturing a packaging box, a method for manufacturing a packaging box, a blank, and a technique for manufacturing a packaging box and a blank using a blank sheet having a surface having a surface having a difficulty in adhesion.

Patent Document 1 states that "a box-forming piece provided with a functional coating such as aluminum-deposited paper having excellent design is used, the work process is simple, the cost is low, and the lid is provided with high adhesive strength. "Provides a wrapping box that can be closed.", "Consists of a box body forming piece integrally punched from a blank sheet having a functional coating on the surface of white paperboard. It is provided with an inner lid piece that is glued to a part of the box body forming piece to close the opening of the cylinder, and a folded piece that is folded back and adhered to the inner lid piece. The folded piece is folded over the inner lid piece. The back surface of the folded piece is exposed in the glued state, and the back surface of the folded piece is glued to a part of the box body forming piece together with the inner lid piece. The inner lid piece has a through hole that exposes the back surface of the folded piece. , The folded piece is provided with an embossed portion that protrudes into the through hole. "

Japanese Unexamined Patent Publication No. 2015-9841

As a material for a packaging box (packaging box), a vapor-deposited paper in which a metal such as aluminum is vapor-deposited on the surface of a resin film such as PET (PolyEthylene Terephthalate) resin and bonded to the surface of a base paper (pulp paper, white paperboard) is used. is there. Since the vapor-deposited paper has a smooth surface with metallic luster and is excellent in aesthetics, for example, it is a material for packaging boxes for cosmetics, pharmaceuticals, foods, luxury goods, etc. for the purpose of enhancing the texture and luxury of the contents. Used as.

However, since the surface of vapor-deposited paper is a smooth metallic material as described above, the impregnation property of the adhesive is poor, and in particular, the type of adhesive (hot melt) generally used for sealing packaging boxes in automatic packaging lines. Etc.), there is a problem that sufficient adhesive strength cannot always be obtained and it is difficult to confirm the adhesiveness. In recent years, in the pharmaceutical and food industries, the standards for sealing of packaging boxes have become stricter, and in order to ensure that pre-opening and tampering can be detected, packaging boxes are packed with contents. It is required to be able to seal securely.

In Patent Document 1, the back surface of the outer lid piece is glued to the front surface of the inner lid piece, the back surface of the folded piece exposed to the through hole in the state of white paperboard is adhered, and an embossed portion is further formed on the back surface of the folded piece. We are trying to secure the adhesive strength by providing it so that it is flush with the inner lid piece.

However, in the configuration of Patent Document 1, since the adhesive area is limited to the area of the portion exposed from the through hole on the back surface of the folded piece of white paperboard, sufficient adhesive strength cannot always be obtained. In addition, it is necessary to form folded pieces, through holes, and embossed portions, which complicates the structure and manufacturing process.

The present invention has been made in view of such a background, and the manufacture of a packaging box capable of ensuring sufficient adhesive strength even when a blank sheet having a surface having a difficult adhesiveness is used as the material of the packaging box. It is intended to provide methods, blank sheets, blanks, and packaging boxes.

One of the present inventions for achieving the above object is a method for manufacturing a packaging box using a blank sheet in which a layer of a vapor-deposited film or a metal layer is formed on the surface of a base paper, and the paper layer is formed on the surface. The welded paper, which is formed and has a resin layer formed on the back surface, is heat-welded to the region where the blank on the front surface of the blank sheet is formed, to which the adhesive for sealing the packaging box is applied. A packaging box is assembled using the blank cut out from the blank sheet.

According to the present invention, from a blank sheet in which a layer of a vapor-deposited film or a metal layer is formed on the surface of a base paper, a blank in which a paper layer is formed in a region to which an adhesive for sealing a packaging box is applied is formed. It can be obtained, and an adhesive such as hot melt can be applied to securely seal the packaging box. Therefore, for example, the packaging box 10 can be quickly and reliably sealed in the automatic packaging line.

Another one of the present invention is the above-mentioned manufacturing method, in which a paper having a thickness (basis weight) of about ^{50 g / m 2 is used as the material of the paper layer.}

^{By using paper with a thickness (basis weight) of about 50 g / m 2} as the material of the paper layer in this way, it is necessary for heat welding, which is thin enough not to cause swelling when the packaging box is sealed. Various requirements are required for sealing packaging boxes, such as having excellent thermal conductivity, being easily impregnated with an adhesive having a high curing speed such as hot melt, and having good adhesiveness, and being difficult to peel off and delamination when bonded. Can be met.

Another one of the present invention is the above-mentioned manufacturing method, in which the blank sheet has a resin layer that is heat-welded to the resin layer of the welded paper.

By using a blank sheet having a resin layer that is heat-welded to the resin layer of the welded paper in this way, the welded paper can be reliably heat-welded to the blank sheet.

Another one of the present invention is the above-mentioned manufacturing method, in which the blank sheet has a structure in which a vapor-deposited film is laminated on the surface of a base paper.

Another one of the present invention is the manufacturing method, wherein the blank is one of the four side plates constituting the cylinder and one of the side plates so as to close one end surface of the cylinder. A first end face plate extending to one side plate, a second end face plate extending to the first side plate so as to close the other end face of the cylinder, and a first end face plate extending to the first end face plate. The packaging box includes one insertion portion and a second insertion portion extending from the second end face plate, and the packaging box is a side plate having a surface of the first insertion portion facing the first side plate. It is sealed by adhering to the back surface of a second side plate and adhering the front surface of the second insertion portion to the back surface of the second side plate, and the welded paper is attached to the front surface of the first insertion portion. The blank area to which the adhesive used for adhesion is applied and the blank area to which the adhesive used for adhesion is applied on the surface of the second insertion portion are heat-welded.

According to the present invention, the front surface of the first insertion portion can be reliably adhered to the back surface of the second side surface plate, and the front surface of the second insertion portion can be reliably adhered to the back surface of the second side surface plate, thereby ensuring the packaging box. Can be sealed in.

The other one of the present invention is a packaging box manufactured by the above manufacturing method, wherein the four side plates, the first end face plate, the second end face plate, the first insertion portion, and the second end face plate. It has an insertion portion, and the surface of the first insertion portion is adhered to the back surface of the second side plate, which is the side plate facing the first side plate, and the surface of the second insertion portion. Is sealed by adhering to the back surface of the second side plate, and the welded paper is applied to the area of the blank to which the adhesive used for the adhesion is applied to the surface of the first insertion portion, and the second difference. It is formed by heat welding to the area of the blank to which the adhesive used for the adhesion is applied on the surface of the inclusion portion.

Another method of the present invention is a method for manufacturing a blank for a packaging box, in which a blank sheet having a vapor-deposited film layer or a metal layer formed on the surface of the packaging box is prepared, and the blank is prepared. On the surface of the sheet on which the vapor-deposited film layer or the metal layer is formed, among the areas defined to form the outer shape of the blank, the area to which the adhesive is applied when the packaging box is assembled from the blank. The resin layer of the welded paper, one surface of which is a paper layer and the other surface of which is a resin layer, is heat-welded, and the region defined to form the outer shape of the blank is cut out from the blank sheet.

According to the present invention, it is possible to obtain a blank capable of sealing the packaging box by using the same kind of adhesive as in the case of a normal blank on which a thin-film film layer or a metal layer is not formed.

The other one of the present invention is the above-mentioned manufacturing method, in which the blank is one of the four side plates serving as a cylinder and one of the side plates so as to close one end surface of the cylinder. A first end face plate extending to the side plate, a second end face plate extending to the first side plate to close the other end surface of the cylinder, and the side plate facing the first side plate. The first insertion portion extending from the first end face plate and the back surface of the second side plate are adhered to the back surface of the second side plate by the adhesive so as to be adhered to the back surface of the second side plate. Each region in which the welded paper is coated with the adhesive of the first insertion portion and the second insertion portion, including a second insertion portion extending from the second end face plate. It is heat-welded to.

According to the present invention, the front surface of the first insertion portion is attached to the back surface of the second side surface plate and the second surface plate is used by using the same type of adhesive as in the case of a normal blank in which a thin-film film layer or a metal layer is not formed. It is possible to obtain a blank in which the front surface of the insertion portion can be adhered to the back surface of the second side plate.

The other one of the present invention is a blank for a packaging box, which is a blank member having a developed shape of the packaging box and having a vapor-deposited film layer or a metal layer formed on the surface of the packaging box on the surface side. The packaging box, which has a welded paper having a paper layer on one side and a resin layer on the other side, and on which the vapor-deposited film layer or the metal layer of the blank member is formed. The resin layer of the welded paper is heat-welded to the region to which the adhesive is applied when assembling.

According to the present invention, it is possible to seal using an adhesive of the same type as the adhesive used when assembling a packaging box whose surface is not a vapor-deposited film layer or a metal layer.

In another one of the present invention, the welded paper is configured to have a plurality of holes penetrating the paper layer.

According to the present invention, it is possible to prevent air from entering between the welded paper and the blank member and improve the strength of heat welding.

In addition, the problems disclosed in the present application and the solutions thereof will be clarified by the column of the form for carrying out the invention and the drawings.

According to the present invention, sufficient adhesive strength can be ensured even when a blank sheet having a surface having a difficult adhesiveness is used as the material of the packaging box.

It is a perspective view which shows the state before opening (sealed state) of a packaging box. It is a perspective view which shows the state after opening (opening state) of a packaging box. It is the figure which looked at the blank from the front side of the packaging box. It is the figure which looked at the blank from the back side of the packaging box. It is a flowchart explaining the flow from manufacturing to disposal of a packaging box. It is an example of a blank sheet in which a blank is formed, and is a figure which shows a state in which a welded paper tape is heat-welded to the surface of a blank sheet. It is a figure which shows the state of cutting by heat welding the welding paper tape on the surface of a blank sheet. It is a figure which shows the state of the surface of a blank sheet after cutting. It is a figure (cross-sectional view) explaining the structure of the welded paper tape. It is a figure (cross-sectional view) explaining the structure of a blank sheet. It is a figure (cross-sectional view) explaining another structure of a blank sheet. It is a figure which shows the appearance of the welded paper tape. It is a figure (cross-sectional view) explaining the structure of the welded paper tape. It is a figure (cross-sectional view) explaining the structure of the welded paper tape. It is the figure which looked at the blank from the front side of the packaging box.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or similar configurations may be designated by the same reference numerals and duplicated description may be omitted.

== 1st Embodiment ==
FIG. 1 is a perspective view showing a state (sealed (sealed) state) of the packaging box 10 described as the first embodiment of the present invention before opening. Further, FIG. 2 is a perspective view showing a state (opened state) of the packaging box 10 after opening. As shown in these figures, the entire packaging box 10 has a substantially rectangular parallelepiped shape. The packaging box 10 is used as a storage container for, for example, pharmaceuticals, cosmetics, luxury items, confectionery, and the like. On the surface of the packaging box 10, for example, information about the contents of the packaging box 10 is printed or printed.

FIG. 3 is a view of the forming piece of the packaging box 10 shown in FIG. 1 or 2 (hereinafter, also referred to as “blank 5”) as viewed from the surface side of the packaging box 10, and FIG. 4 shows the blank 5 as viewed from the surface side. , Is a view seen from the back side of the packaging box 10. The blank 5 is formed by punching (or cutting out) the blank sheet 2 with a manufacturing machine such as a cutter machine.

Although details will be described later, the blank 5 according to the present embodiment includes a blank member 6 and welded papers K1 and K2. The blank member 6 has a structure in which a vapor-deposited film layer and a foil layer are formed on the surface of a base paper such as pulp paper, and has a developed shape of the packaging box 10. The welded papers K1 and K2 have a structure in which one side is a paper layer and the other side is a resin layer, and the resin layer faces the thin-film film layer and the foil layer at a predetermined position of the blank member 6. It is heat welded in the direction.

Further, the blank 5 is formed by heat-welding the welding papers K1 and K2 to a predetermined position of the blank sheet 2 and then cutting out the blank sheet 2 along the outer shape of the blank 5 (the developed shape of the packaging box 10). To.

The blank sheet 2 is a resin film (PET (PolyEthylene Terephthalate) film, PVA (PolyVinyl Alcohol) film, PP (PolyPropylene film, etc.)) on which a metal such as aluminum is vapor-deposited (hereinafter, referred to as a vapor-deposited film). ) Is bonded to the surface of pulp paper (base paper) such as thick paper or white paperboard. In the case of a general vapor-deposited film, the layer thickness is, for example, about 10 to 20 μm.

The thin-film film is bonded to the blank sheet 2 only on the front surface side to form a layer of the thin-film film, and the back surface side of the blank sheet 2 is exposed on the back surface of the pulp paper. The blank 5 is formed from the blank sheet 2 so that the front surface side thereof is the front surface side of the blank sheet 2. In the present embodiment, the case where a vapor-deposited paper having a layer of a vapor-deposited film formed on the surface of the pulp paper is used as the blank sheet 2 will be described as an example. Blank sheet 2 using various processed papers in which a layer with difficulty in adhesion is formed on the surface of the base paper, such as foil paper in which a metal layer such as aluminum foil is bonded to the surface of the base paper (base paper). Is widely applicable.

Since the back surface of the blank sheet 2 (or the blank member 6) (the back surface of the base paper) is exposed, the curing rate is high, which is used for sealing the packaging box 10 (sealing performed after loading the product). Good impregnation property of adhesive (hot melt, etc.) and excellent adhesiveness. On the other hand, the front surface of the blank sheet 2 (or the blank member 6), that is, the front surface of the vapor-deposited film, is less impregnated with the adhesive used for sealing the packaging box 10 than the back surface, and the packaging box 10 is assembled and sealed. It is difficult to secure the required adhesive strength.

As shown in FIG. 3, the blank 5 has an unfolded shape of the packaging box 10, and four side plates (first side plate 11, back plate) connected so that their long sides are parallel to each other. 12, the second side plate 13 and the front plate 14), the connection piece 17 (glue flap) extending at one end of the four side plates in the connecting direction, and the back plate 12 in the direction perpendicular to the connecting direction. The first end face plate 15 (top plate) extending to one of the short sides of the above, and the second end face plate 16 (bottom) extending to the other of the short sides in the direction perpendicular to the connecting direction of the back plate 12. It has a face plate).

The first side plate 11, the back plate 12, the second side plate 13, the front plate 14, and the connecting piece 17 are connected in this order with their long sides as boundaries, and are packaged by bending and assembling them. A square tubular body is formed to form a space for storing the contents of the box 10. Here, when forming the tubular body, for example, the connecting piece 17 is adhered to the back surface side of the first side plate 11 by applying an adhesive to the vapor-deposited film on the front surface thereof. The adhesive used for this adhesion is, for example, a type that can firmly adhere between the vapor-deposited film on the front surface of the connecting piece 17 and the back surface of the first side plate 11 (emulsion type adhesive in which a resin polymer is dispersed). Agent etc.) is used. It should be noted that this type of adhesive is not necessarily suitable for sealing the packaging box 10 in the automatic packaging line because it takes a little time to obtain sufficient strength as compared with the adhesive used for sealing described above.

The back plate 12 and the front plate 14 have the same shape (substantially rectangular shape), and these form a pair of opposite side surfaces of the above-mentioned cylinder. Further, the first side plate 11 and the second side plate 13 have the same shape (substantially rectangular shape), and these form a pair of opposite side surfaces of the above-mentioned cylinder.

The first end face plate 15 and the second end face plate 16 each function to close the entire two facing end faces of the above-mentioned tubular body of the packaging box 10 composed of the four side plates. In this example, the area of the back plate 12 or the front plate 14 is larger than the area of the first side plate 11 or the second side plate 13, but the area ratios thereof are not necessarily the modes shown in the figure. Not limited. Further, the relationship between the long side and the short side of each side plate (which side is to be the long side or the short side) is not limited to the mode shown in the figure.

As shown in FIG. 3, a mountain fold line 31 is formed at the boundary between the first side plate 11 and the back plate 12, and a mountain fold line 32 is formed at the boundary between the back plate 12 and the second side plate 13. .. A mountain fold line 41 is formed at the boundary between the second side surface plate 13 and the front plate 14, and a mountain fold line 42 is formed at the boundary between the front plate 14 and the connecting piece 17. The mountain fold line 31, the mountain fold line 32, the mountain fold line 41, and the mountain fold line 42 are all parallel to each other.

As shown in the figure, on the side of the first side surface plate 11 where the first end face plate 15 exists in the state where the above-mentioned tubular body is formed, a flap 111 is provided via the mountain fold line 61, and the first side is also provided. On the side of the face plate 11 where the second end face plate 16 exists in the state where the above-mentioned tubular body is formed, flaps 112 are extended via the mountain fold line 62, respectively. Further, on the side of the second side surface plate 13 where the first end face plate 15 exists in the state where the above-mentioned tubular body is formed, a flap 131 is provided via the mountain fold line 63, and the above-mentioned second side surface plate 13 is described above. Flap 132s are extended via the mountain fold line 64 on the side where the second end face plate 16 exists in the state where the tubular body is formed. The flap mode (number of sheets, shape, etc.) is only an example.

The first end face plate 15 is continuously provided to the back plate 12 via the mountain fold line 65. Further, an insertion portion 151 (tongue piece) is continuously provided on the end side of the first end face plate 15 on the side opposite to the side where the back plate 12 exists, via the mountain fold line 67. It should be noted that the vicinity of both ends of the mountain fold line 67 is a notch line, which is the insertion portion 151 when the insertion portion 151 is inserted into the cylinder and the end surface of the cylinder is closed by the first end face plate 15. This is to improve operability.

As shown in FIG. 3, in the region (hereinafter referred to as “welding region 151b”) of the front surface of the insertion portion 151 excluding the region 151a in the vicinity of the mountain fold line 67, a resin layer (the other surface) is formed on the back surface (the other surface). Welded paper K1 having a resin layer 92) described later and a paper layer (paper layer 91 described later) on the surface (one surface) is heat-welded with the paper layer facing up (front side). The area of the vapor-deposited film is left in the vicinity region 151a of the insertion portion 151 because the surface of the welded paper K1 having a different texture is packaged in a state where the end surface of the packaging box 10 is closed by the first end face plate 15. This is to make the appearance of the box 10 less likely to appear and to enhance the aesthetic appearance of the packaging box 10. The mode (shape, size, number, etc.) of the welding region 151b is not limited to that shown in the figure, and may be provided as a spot, for example.

The second end face plate 16 is continuously provided to the back plate 12 via the mountain fold line 66. Further, an insertion portion 161 (tongue piece) is continuously provided on the end side of the second end face plate 16 on the side opposite to the side where the back plate 12 exists, via the mountain fold line 68. It should be noted that the vicinity of both ends of the mountain fold line 68 is a notch line, which is an insertion portion when the insertion portion 161 is inserted into the end face of the cylinder and the end face of the cylinder is closed by the second end face plate 16. This is to improve the operability of 161.

As shown in the figure, a region excluding the region 161a near the mountain fold line 68 on the front surface of the insertion portion 161 (hereinafter, referred to as “welding region 161b”) has a resin layer on the back surface and a paper layer on the front surface. The welded paper K2 having the above is heat-welded with the paper layer facing up (front side). The area of the vapor-deposited film is left in the vicinity region 161a of the insertion portion 161 because the surface of the welded paper K2 having a different texture is packaged in a state where the end surface of the packaging box 10 is closed by the second end face plate 16. This is to make the appearance of the box 10 less likely to appear and to enhance the aesthetic appearance of the packaging box 10. The mode (shape, size, number, etc.) of the welding region 161b is not limited to that shown in the figure, and may be provided as a spot, for example.

A substantially rectangular (substantially trapezoidal) push-in portion 145 is formed in the vicinity of the center of the end side of the front plate 14 on the side where the first end face plate 15 of the tubular body is provided. The peripheral edge of the push-in portion 145 is a break line 1451 that breaks when the user pushes the push-in portion 145 from the outside when the packaging box 10 is opened.

<Assembly and sealing of packaging box>
The packaging box 10 is assembled and sealed as follows. First, the first side plate 11, the back plate 12, the second side plate 13, the front plate 14, and the connecting piece 17 are bent to bond the connecting piece 17 and the first side plate 11, and the above-mentioned square tubular body. To form.

Subsequently, the flap 112, the flap 132, the second end face plate 16, and the insertion portion 161, which are the configurations on the bottom surface side of the cylinder, are attached to the mountain fold line 62, the mountain fold line 64, the mountain fold line 66, and the mountain fold line 68, respectively. Bend along. Then, an adhesive having a high curing rate such as hot melt is applied to the surface of the welded paper K2 that is heat-welded to the insertion portion 161 and the insertion portion 161 is inserted along the end face of the cylinder to form the insertion portion 161. The front surface is adhered to the back surface of the front plate 14, and one end surface (bottom surface) of the cylinder is closed. Since the adhesive is applied to the exposed surface of the welded paper K2 in this way, the adhesive is easily impregnated, and the insertion portion 161 and the back surface of the front plate 14 are adhered quickly and with sufficient strength. Can be done.

Subsequently, the cylinder whose bottom surface is closed is filled with the contents, and the flap 111, the flap 131, the first end face plate 15, and the insertion portion 151, which are configured on the top surface side of the cylinder, are respectively provided. , Yamaori line 61, Yamaori line 63, Yamaori line 65, and Yamaori line 67. Then, an adhesive having a high curing rate such as hot melt is applied to the surface of the welded paper K1 that is heat-welded to the insertion portion 151, and the insertion portion 151 is inserted along the end face of the cylinder, and the insertion portion 151 is formed. The front surface is adhered to the back surface of the front plate 14, and the other end surface (top surface) of the cylinder is closed. Since the adhesive is applied to the surface of the welded paper K1 where the paper layer is exposed in this way, the adhesive is easily impregnated, and the insertion portion 151 and the back surface of the front plate 14 are adhered quickly and with sufficient strength. Can be done.

By going through the above procedure, the assembly and sealing of the packaging box 10 are completed. As a result, the packaging box 10 is in the state shown in FIG.

<Opening the packaging box>
The packaging box 10 is opened as follows. First, the user pushes the push-in portion 145 into the package box 10 in the sealed state shown in FIG. 1 with a thumb or the like to break the break line 1451, and puts a finger on the hole formed by the push-in portion 145 to break the insertion portion. The first end face plate 15 is pulled up together with 151. As a result, the packaging box 10 is in the opened state shown in FIG.

As described above, when opening the packaging box 10, it is necessary to break the break line 1451, and a third party can easily determine whether or not the packaging box 10 has been opened. When applying the adhesive when the front surface of the insertion portion 151 (here, the paper layer of the welded paper K1) is adhered to the back surface of the front plate 14, for example, the user pulls up the first end face plate 15 to apply the packaging box 10. When the operation of opening the package is performed, it is performed in a manner (position, shape, size, number, strength, etc.) that does not interfere with the operation.

For example, the adhesive strength between the paper layer of the welded paper K1 and the back surface of the front plate 14 is weaker than the strength of heat welding between the resin layer of the welded paper K1 and the vapor-deposited film layer on the surface of the blank member 6. Is set to. Conversely, the strength of heat welding between the resin layer of the welded paper K1 and the vapor-deposited film layer on the surface of the blank member 6 is higher than the adhesive strength between the paper layer of the welded paper K1 and the back surface of the front plate 14. Is also set to be stronger.

Therefore, when the user pushes the push-in portion 145 with a thumb or the like to break the break line 1451 when the packaging box 10 is opened, the welded paper K1 that is heat-welded to the insert portion 151 is torn or the insert portion. Without peeling off from 151, it peels off from the back surface of the front plate 14 while being welded to the insertion portion 151. As a result, when the packaging box 10 is opened, damage to the packaging box 10 can be prevented, the aesthetic appearance of the packaging box 10 can be maintained, and the user can feel the luxury of the contents.

The same applies to the welded paper K2, and the adhesive strength between the paper layer of the welded paper K2 and the back surface of the front plate 14 is between the resin layer of the welded paper K2 and the vapor-deposited film layer on the surface of the blank member 6. It is set to be weaker than the heat welding strength of. Conversely, the strength of heat welding between the resin layer of the welded paper K2 and the vapor-deposited film layer on the surface of the blank member 6 is higher than the adhesive strength between the paper layer of the welded paper K2 and the back surface of the front plate 14. Is also set to be stronger.

In this case, for example, when the packaging box 10 is disassembled, the user inserts a finger or the like from the side of the second end face plate 16 into the back surface of the front plate 14 to separate the insertion portion 161 and the front plate 14. The welded paper K2 heat-welded to the insertion portion 161 is peeled from the back surface of the front plate 14 while being welded to the insertion portion 161 without being torn or peeled from the insertion portion 161. As a result, the aesthetic appearance of the packaging box 10 can be maintained even when the packaging box 10 is disassembled, and the user can feel the luxury of the contents.

<From manufacturing to disposal of packaging boxes>
Subsequently, along with the flowchart shown in FIG. 5, the flow from the manufacture of the packaging box 10 to disposal (blank formation, assembly → boxing → sealing (sealing) → opening → resealing → disassembly → disposal) will be described.

When assembling the packaging box 10, a blank 5 is first formed from the blank sheet 2 (S511). The blank 5 can be formed from the blank sheet 2 by using, for example, a machine such as a cutter machine or a ruled line setting device, but it may also be performed manually. The details of the procedure for forming the blank 5 from the blank sheet 2 will be described later.

Subsequently, using a carting machine (box making machine) or the like, the four side plates (first side plate 11, back plate 12, second side plate 13, and front plate 14) of the blank 5 and the connecting piece 17 are bent. (S512).

Subsequently, an adhesive (an emulsion type adhesive or the like in which a resin polymer is dispersed) is applied to the surface of the connecting piece 17, and the front surface of the connecting piece 17 is adhered to the back surface of the first side plate 11 (S513). For example, the manufacturer of the packaging box 10 delivers the blank 5 to the manufacturer of the contents (the company that loads and seals the product) in this state with high transportation efficiency.

Subsequently, the blank 5 is three-dimensionally raised using a carting machine (box making machine) or the like to form the above-mentioned cylinder, and an adhesive (hot melt or the like has a high curing rate) on the surface of the insertion portion 161. The bottom surface (end surface) of the cylinder is closed by applying the above-mentioned adhesive and adhering the front surface of the insertion portion 161 to the back surface of the front plate 14 with the above adhesive (S514).

Subsequently, the contents of the packaging box 10 are packed in a cylinder using a boxing machine or the like (S515), and an adhesive (a hot melt or the like having a high curing speed) is applied to the surface of the insertion portion 151. By adhering the front surface of the insertion portion 151 to the back surface of the front plate 14 with the above adhesive, the top surface (end surface) of the cylinder is closed and the packaging box 10 is sealed (sealed) (S516).

When making a box using a carting machine (box making machine) or the like, the surface of the insertion part 151 or the insertion part 161 may be affected by the structural restrictions of the box making machine or the time restrictions at the time of box making. Since it is necessary to quickly adhere to the back surface of the front plate 14, an adhesive having a high curing rate such as hot melt is selected as the above adhesive, but an adhesive having a high curing rate such as hot melt is generally used for a vapor-deposited film. On the other hand, it is difficult to obtain sufficient strength.

However, in the packaging box 10 of the present embodiment, the welded paper K1 is hot-welded to the surface of the insertion portion 151 and the welding paper K2 is hot-welded to the surface of the insertion portion 161, respectively, and the hot melt is formed on the surface of the insertion portion 151. A paper layer of welded paper K1 that is easily impregnated with an adhesive having a fast curing rate such as hot melt, and a paper layer of welded paper K2 that is easily impregnated with an adhesive having a fast curing rate such as hot melt on the surface of the insertion portion 161. Since each of them is exposed, the front surfaces of the insertion portions 151 and 161 can be quickly and firmly adhered to the back surface of the front plate 14, and the packaging box 10 can be efficiently sealed using a box making machine or the like. ..

After that, for example, the packaging box 10 is shipped and reaches the hands of a user such as a consumer via a predetermined distribution channel or the like. The user unseals the packaging box 10, opens the packaging box 10, and takes out the contents (S517). In some cases, the packaging box 10 is resealed and used continuously for storage of the remaining contents (S518). After that, the finally used packaging box 10 is disassembled and discarded (S519, S520).

<Formation of blank>
Subsequently, a procedure for forming the blank 5 from the blank sheet 2 will be described.

First, the blank sheet 2 is prepared. FIG. 6 shows an example of a blank sheet 2 in which a plurality of (three in this example) blanks 5 are formed (cut out). The figure is a view of the blank sheet 2 viewed from the surface side on which the thin-film deposition film is formed. The entire blank sheet 2 illustrated has a rectangular shape. The number of blanks 5 formed from one blank sheet 2 is not necessarily limited. In the blank sheet 2, a slight gap is provided between the regions cut out as the blanks 5 (regions defined to form the outer shape of the blank 5). For convenience of explanation, the x-axis is set in the direction of the short side of the blank sheet 2 and the y-axis is set in the direction of the long side of the blank sheet 2.

The three regions cut out as the blank 5 are formed on the blank sheet 2 in parallel in the direction in which the four side plates (first side plate 11, back plate 12, second side plate 13, and front plate 14) are connected in series. Be placed. The three regions cut out as the blank 5 are arranged on the blank sheet 2 so that the above-mentioned welding regions 151b or welding regions 161b are arranged in a line along the y-axis. In this example, the three regions cut out as blanks 5 are represented by the mountain fold line 61, the mountain fold line 65, and the mountain fold line 63 (or the mountain fold line 62, the mountain fold line 66, and the mountain fold line 64) of each blank 5. It is arranged so that it is located on a straight line parallel to the axis.

Next, on the surface of the blank sheet 2 on which the vapor-deposited film is formed, among the regions defined to form the outer shape of the blank 5, the region to which the adhesive is applied when assembling the packaging box 10 (FIG. 6). The welded paper K1 and the welded paper K2 are hot-welded to the welded region 151b or the welded region 161b) shown. The heat welding of the welding paper K1 and the welding paper K2 to the welding region 151b and the welding region 161b is performed, for example, as follows.

First, as shown in the figure, of the three regions cut out as the blank 5 set on the blank sheet 2, the three welded regions 151b on the −x side are covered with a rectangular strip-shaped welded paper tape T1 having a size including each. Heat welding is performed parallel to the y-axis. Further, among the three regions cut out as the blank 5 set on the blank sheet 2, the rectangular strip-shaped welded paper tape T2 having a size including each is heat-welded to the three welding regions 161b on the + x side in parallel with the y-axis. .. These heat welding steps can be performed using, for example, a thermal transfer device.

Subsequently, the welded paper tape T1 and the welded paper tape T2 that are heat-welded to the blank sheet 2 are bladed, and unnecessary portions are cut so as to have the shapes of the welded paper K1 and the welded paper K2, respectively. This step can be performed using, for example, a cutting machine.

FIG. 7 shows a state in which the above heat welding and cutting are performed. Further, FIG. 8 shows the state of the blank sheet 2 after cutting.

Then, the blank 5 is punched out from the blank sheet 2 using a cutting machine or the like.

All of the steps shown above can be automatically performed using a thermal transfer device or a cutting machine. Therefore, the packaging box 10 (blank 5) of the present embodiment can be easily implemented by using, for example, existing equipment without significantly changing the conventional process.

<Structure of welded paper tape>
FIG. 9 is a cross-sectional view illustrating the structure of the welded paper tapes T1 and T2 shown as an example. As shown in the figure, the welded paper tapes T1 and T2 have a paper layer 91 on one side and a resin layer 92 on the other side, and a blank sheet is formed by laminating the lower surface of the paper layer 91. The surface on the side to be heat-welded to 2 is formed so as to be a resin layer 92 (for example, a PET resin layer having a layer thickness of about 15 μm).

Here, the welded paper tapes T1 and T2 are heat-welded so that the packaging box 10 is thin enough not to cause swelling when each end face of the tubular body is closed by the first end face plate 15 or the second end face plate 16. The paper layer 91 has the necessary thermal conductivity, is easily impregnated with an adhesive having a high curing speed such as hot melt, and has good adhesiveness. The front surface of the insertion portions 151 and 161 is placed on the back surface of the front plate 14. It is required to satisfy the conditions such that it is difficult to peel off when bonded and delamination is unlikely to occur. In order to satisfy the above requirements, for example, paper having a thickness (basis weight) of about ^{50 g / m 2 is used as the material of the paper layer 91.}

<Structure of blank sheet (deposited paper, foil paper)>
FIG. 10A shows a cross section for explaining the structure of the blank sheet 2 illustrated in the present embodiment. The blank sheet 2 illustrated has a structure in which a thin-film film 103 such as an aluminum-film-deposited film is bonded (laminated) to the surface of a base paper 101 such as pulp paper via a laminate layer 102. As shown in the figure, the vapor-deposited film 103 has a vapor-deposited layer 1032 that forms a layer on the surface side of the packaging box 10 (blank 5), and a film layer 1031 made of a PET resin film or the like. In this example, the surface of the blank sheet 2 is a thin-film deposition layer 1032.

FIG. 10B is a cross-sectional view illustrating the structure of the blank sheet 2 shown as another example. The illustrated blank sheet 2 has a structure in which the front and back sides of the vapor-deposited film 103 are inverted in the structure of the blank sheet 2 shown in FIG. 10A. Other structures are the same as in FIG. 10A. In the case of the blank sheet 2, since the film layer 1031 is exposed on the surface of the blank sheet 2, the heat-weldability of the welded paper tapes T1 and T2 can be improved.

== Second embodiment ==
In the second embodiment, the blank 5 and the packaging box 10 are formed by using the welding papers K3 and K4 instead of the welding papers K1 and K2. Since the second embodiment is common to the first embodiment except that the welded papers K3 and K4 are used instead of the welded papers K1 and K2, overlapping description will be omitted as appropriate.

The welded paper K3 is a strip-shaped welded paper tape T3 as shown in FIG. 11, cut out so as to have the shape of the welded paper K3, and the welded paper K4 is a strip-shaped welded paper tape T4 as shown in FIG. It is cut out so as to have the shape of welded paper K4. Specifically, as shown in FIG. 7, the welded papers K3 and K4 are each welded paper by heat-welding the welded paper tape T3 and the welded paper tape T4 to the blank sheet 2 and then cutting the blades using a cutting machine. It can be formed by cutting unnecessary portions so as to have the shape of K3 and the welded paper K4.

Similar to the welded paper tapes T1 and T2, the welded paper tapes T3 and T4 each have a paper layer 91 on one side and a resin layer 92 on the other side, and the lower surface of the paper layer 91 is laminated. As a result, the surface on the side to be heat-welded to the blank sheet 2 is formed to be a resin layer 92 (for example, a PET resin layer having a layer thickness of about 15 μm).

However, as shown in FIG. 11, a plurality of holes 200 are formed in the welded paper tapes T3 and T4. As shown in FIG. 12A, these holes 200 are formed so as to penetrate the paper layer 91 and the resin layer 92.

Therefore, when the welded paper tapes T3 and T4 are hot-welded to the blank sheet 2, the air that has entered between the welded paper tapes T3 and T4 and the blank sheet 2 can be discharged from the holes 200, and the welded paper tapes T3 and T4 can be discharged. Can be more reliably adhered to the blank sheet 2. This makes it possible to prevent air from entering between the welded papers K3 and K4 and the blank member 6 and improve the strength of heat welding.

Therefore, when the packaging box 10 is opened, the welded paper K3 that is heat-welded to the insertion portion 151 is not torn or peeled off from the insertion portion 151, and is welded to the insertion portion 151 while being welded to the front plate 14. Peel off from the back side. As a result, the packaging box 10 can be prevented from being damaged, the appearance of the packaging box 10 can be maintained, and the user can feel the luxury of the contents.

Similarly, when the packaging box 10 is disassembled, the welded paper K4 that is heat-welded to the insertion portion 161 is not torn or peeled off from the insertion portion 161 and remains welded to the insertion portion 161 as the front plate. Peel off from the back surface of 14. As a result, the aesthetic appearance of the packaging box 10 can be maintained, and the user can feel the luxury of the contents.

Further, when the packaging box 10 is sealed, the adhesive applied to the surface of the welding paper K4 when the front surface of the insertion portion 161 (the surface of the paper layer 91 of the welding paper K4) is adhered to the back surface of the front plate 14. The adhesive strength between the insertion portion 161 (the front surface of the welded paper K4) and the back surface of the front plate 14 can be improved by entering the hole 200.

Similarly, when the surface of the insertion portion 151 (the surface of the paper layer 91 of the welded paper K3) is adhered to the back surface of the front plate 14, the adhesive applied to the surface of the welded paper K3 enters the hole 200. Thereby, the adhesive strength between the insertion portion 151 (the front surface of the welded paper K3) and the back surface of the front plate 14 can be improved.

That is, since a plurality of holes 200 are formed in the welded papers K3 and K4, the strength of heat welding between the welded papers K3 and K4 and the vapor-deposited film 103 of the blank member 6 can be improved and welded. It is also possible to improve the adhesive strength between the papers K3 and K4 and the back surface of the front plate 14 (base paper 101 of the blank member 6).

FIG. 13 shows how the welding paper K3 is heat-welded to the welding region 151b of the insertion portion 151 of the blank 5 and the welding paper K3 is heat-welded to the welding region 161b of the insertion portion 161 of the blank 5. ..

Further, the welded paper tapes T3 and T4 have holes 200 by penetrating a needle (not shown) through the welded paper tapes T1 and T2 having no holes 200, and then are wound into a roll shape as shown in FIG. When the needle is passed from the resin layer 92 side toward the paper layer 91 side when the hole 200 is drilled, the blurring of the welded paper tapes K3 and K4 in the width direction can be reduced in the subsequent winding process, and the roll can be rolled. The end faces can be aligned.

As shown in FIG. 12B, the welded paper tapes T3 and T4 created by penetrating the needle from the side of the resin layer 92 toward the side of the paper layer 91 have paper around each hole 200. It is convex on the side of the layer 91 and concave on the side of the resin layer 92. In this way, in the resin layer 92, a recess is formed around the hole 200, so that when the welded paper tapes T3 and T4 are welded to the blank member 6, air is introduced between the welded paper tapes T3 and T4 and the blank member 6. Even if it is mixed, air can easily escape toward the hole 200 from the recessed portion around the hole 200.

As shown in FIG. 7, the welded paper tapes T3 and T4 heat the blank sheet 2 in the concave portion (resin layer 92 side) and the convex portion (paper layer 91 side) around the holes 200 of the welded paper tapes T3 and T4. By being pressed by the heat conductive plate during welding, it becomes flat as shown in FIG. 12A, so that the appearance of the blank 5 is not spoiled.

Further, the holes 200 formed in the welded papers K3 and K4 and the welded paper tapes T3 and T4 can penetrate at least the paper layer 91 without penetrating both the paper layer 91 and the resin layer 92. Good. Even in this case, when the welded paper tapes T3 and T4 are heat-welded to the blank sheet 2, the air that has entered between the welded paper tapes T3 and T4 and the blank sheet 2 is melted by the resin layer 92, for example, by heat. During the process, the paper is discharged from the holes 200 formed in the paper layer 91. Therefore, the welded paper tapes T3 and T4 can be more reliably adhered to the blank sheet 2. Then, it is possible to prevent air from being mixed between the welded papers K3 and K4 and the blank member 6 and improve the strength of heat welding.

As described in detail above, according to the present invention, as the blank sheet 2 for forming the blank 5 of the packaging box 10, a process in which a layer having difficulty in adhesiveness such as vapor-deposited paper or foil paper is formed on the surface thereof. Even when paper is used, the adhesive strength required for sealing the packaging box 10 can be ensured. Therefore, for example, the packaging box can be quickly and reliably sealed in the automatic packaging line.

Further, a trader who assembles a packaging box 10 from a blank 5 using processed paper having such a difficulty in adhesiveness, stores and seals the contents, seals the packaging box 10 having such a difficulty in adhesiveness. Even in this case, it is possible to use an adhesive used for sealing a packaging box made of pulp paper such as thick paper or white paperboard which is not processed paper. That is, the adhesive can be shared regardless of whether the material of the packaging box 10 is processed paper or not processed paper. Therefore, no matter what kind of packaging box is sealed, the adhesive replacement process becomes unnecessary, and it is possible to rationalize the manufacturing process of the product and reduce the manufacturing cost.

Further, by creating the blank 5 using the welded paper tapes T3 and T4 (welded papers K3 and K4) in which a plurality of holes 200 are formed as described in the second embodiment, the welded papers K3 and K4 are more firmly formed. Can be brought into close contact with the blank member 6.

Further, in each of the above embodiments, the connecting piece 17 of the blank 5 has a vapor-deposited film 103 on the front surface of the connecting piece 17 and a base paper 101 on the back surface of the first side plate 11, such as an emulsion type in which a resin polymer is dispersed. Although an adhesive of a type capable of firmly adhering to and from is used, a welded paper similar to the welded papers K1 to K4 may be heat-welded to the vapor-deposited film 103 on the surface of the connecting piece 17. According to such an aspect, the adhesive applied to the connecting piece 17 can be shared with the adhesive used when sealing a packaging box made of pulp paper such as thick paper or white paperboard which is not processed paper. Become.

The above description is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention includes equivalents thereof.

2 blank sheet, 5 blank, 6 blank member, 10 packaging box, 11 first side plate, 12 back plate, 13 second side plate, 14 front plate, 15 first end face plate, 91 paper layer, 92 resin layer, 102 Laminated layer, 103 vapor-deposited film, film layer 1031, vapor-deposited layer 1032, 151 insertion part, 16 second end face plate, 161 insertion part, 200 holes, K1 welded paper, K2 welded paper, K3 welded paper, K4 welded paper, 151a vicinity area, 151b welding area, 161a vicinity area, 1616b welding area, T1 welding paper tape, T2 welding paper tape, T3 welding paper tape, T4 welding paper tape

Claims (13)

A method for manufacturing a packaging box using a blank sheet in which a layer of a thin-film film or a metal layer is formed on the surface of a base paper.
The welded paper having a paper layer formed on the front surface and a resin layer formed on the back surface is applied to a region of the blank sheet on which the blank on the front surface is formed, to which an adhesive for sealing the packaging box is applied. Heat welded to
Assemble the packaging box using the blank cut out from the blank sheet.
How to manufacture a packaging box. The method for manufacturing a packaging box according to claim 1.
As the material of the paper layer, a paper having a thickness of about ^{50 g / m 2 is used.}
How to manufacture a packaging box. The method for manufacturing a packaging box according to claim 1.
The blank sheet has a resin layer that is heat-welded to the resin layer of the welded paper.
How to manufacture a packaging box. The method for manufacturing a packaging box according to claim 1.
The blank sheet has a structure in which a vapor-deposited film is laminated on the surface of a base paper.
How to manufacture a packaging box. The method for manufacturing a packaging box according to claim 1.
The blank is
Four side plates that make up the cylinder,
A first end face plate extending from a first side plate, which is one of the side plates, so as to close one end surface of the cylinder.
A second end face plate extending from the first side plate so as to close the other end face of the cylinder,
The first insertion portion extending from the first end face plate,
A second insertion portion extending from the second end face plate,
Including
In the packaging box, the surface of the first insertion portion is adhered to the back surface of the second side plate, which is the side plate facing the first side plate, and the surface of the second insertion portion is attached to the second surface. It is sealed by adhering to the back side of the side plate,
The welded paper is coated with the blank area to which the adhesive used for the adhesion is applied on the surface of the first insertion portion, and the adhesive used for the adhesion on the surface of the second insertion portion. Heat weld to the blank area,
How to manufacture a packaging box. A packaging box manufactured by the method for manufacturing a packaging box according to claim 5.
It has the four side plates, the first end face plate, the second end face plate, the first insertion portion, and the second insertion portion.
The surface of the first insertion portion is adhered to the back surface of the second side plate, which is the side plate facing the first side plate, and the surface of the second insertion portion is the back surface of the second side plate. It is sealed by adhering to
The welded paper is coated with the blank area to which the adhesive used for the adhesion is applied on the surface of the first insertion portion, and the adhesive used for the adhesion on the surface of the second insertion portion. It is heat-welded to the blank area,
Packaging box. A method for manufacturing blanks for packaging boxes.
Prepare a blank sheet in which a thin-film film layer or a metal layer is formed on the surface of the packaging box.
On the surface of the blank sheet on which the vapor-deposited film layer or the metal layer is formed, an adhesive is applied when the packaging box is assembled from the blank in the area defined to form the outer shape of the blank. The resin layer of the welded paper, one side of which is a paper layer and the other side of which is a resin layer, is heat-welded to the region.
A region defined to form the outer shape of the blank is cut out from the blank sheet.
Blank manufacturing method. The blank manufacturing method according to claim 7.
The blank is
Four side plates that form a cylinder and
A first end face plate extending from a first side plate, which is one of the side plates, so as to close one end surface of the cylinder.
A second end face plate extending from the first side plate to close the other end face of the cylinder, and
A first insertion portion extending from the first end face plate so as to be adhered to the back surface of the second side plate, which is the side plate facing the first side plate, by the adhesive.
A second insertion portion extending from the second end face plate so as to be adhered to the back surface of the second side plate by the adhesive, and a second insertion portion.
Including
The welded paper is heat-welded to each region of the first insertion portion and the second insertion portion to which the adhesive is applied.
Blank manufacturing method. A blank for the packaging box
A blank member having an unfolded shape of a packaging box and having a vapor-deposited film layer or a metal layer formed on the surface of the packaging box.
Welded paper, one side of which is a paper layer and the other side of which is a resin layer,
Have,
The resin layer of the welded paper is heat-welded to a region of the surface of the blank member on which the thin-film film layer or the metal layer is formed, to which an adhesive is applied when the packaging box is assembled. blank. The method for manufacturing a packaging box according to any one of claims 1 to 5.
A method for manufacturing a packaging box, wherein the welded paper is configured to have a plurality of holes penetrating the paper layer. The packaging box according to claim 6.
The welded paper is a packaging box having a plurality of holes penetrating the paper layer. The method for producing a blank according to claim 7 or 8.
A method for producing a blank, wherein the welded paper is configured to have a plurality of holes penetrating the paper layer. The blank according to claim 9.
The welded paper is a blank having a plurality of holes penetrating the paper layer.

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