JP2021109696A - Package and method for manufacturing the same - Google Patents

Abstract

To provide a window part capable of maintaining a beautiful appearance in a package having a window through which the inside is visible.SOLUTION: A transparent front surface film 16 is stuck to a surface 15a of a base material sheet 15 having a through window-hole 13 to close the window-hole 13, and a transparent backside film 17 is similarly stuck to a backside 15b of the base material sheet 15 to close the window-hole 13. In the window-hole 13, the front surface film 16 and the backside film 17 are joined together to provide rigidity and tension to a translucent part 12.SELECTED DRAWING: Figure 2

Description

The present invention relates to a package for packaging a product or the like, and more particularly to a package having a window for seeing through the inside.

As a package with a window, a package is known in which a transparent film is attached from the back surface of the base sheet to a window portion punched and formed on a paper base sheet.

However, as shown in FIG. 13, the window portion 102 of the package 101 with a window was wavy, loose, wrinkled, etc., and was not beautiful.

Therefore, in Patent Document 1 below, a special film is used to obtain a good finish.

Japanese Unexamined Patent Publication No. 2003-118726

However, in the case of a configuration using a specific film, there is a drawback that the range of film selection is narrowed. Further, even with the configuration of Patent Document 1, if the paper base sheet absorbs moisture, the base sheet may be wavy or distorted, so that the beauty of the window portion may not be maintained.

Therefore, the main object of the present invention is to make it possible to obtain a window having a beautiful appearance and a sustainable window.

The means for that is a packaging body made of a base material sheet having a penetrating window hole and having a transparent portion made of a transparent film formed in the window hole, and the transparent portion is the surface of the base material sheet. It is a package composed of a front surface film attached to the base sheet and a back surface film attached to the back surface of the base material sheet.

In this configuration, the front surface film and the back surface film attached to both the front and back surfaces of the base sheet increase the rigidity of the window hole and the translucent portion as compared with the case where the transparent film is attached to only one side. Further, the front surface film and the back surface film suppress the base sheet from absorbing moisture from both sides thereof and the end surface of the window hole.

According to the present invention, since the window hole and the translucent portion have high rigidity, it is possible to suppress the occurrence of factors such as waviness that adversely affect the appearance, and to improve the visibility of the inside as well as the appearance. Moreover, since the front surface film and the back surface film suppress the moisture absorption of the base sheet, the shape obtained at the time of production can be maintained and the beauty can be maintained.

Perspective view of the package. Cross-sectional view of the translucent part of the package. The perspective view of the sheet material which comprises a packaging body. The perspective view which shows one process for obtaining a sheet material. The perspective view which shows one process for obtaining a sheet material. The perspective view which shows one process for obtaining a sheet material. An enlarged perspective view showing the structure of a folded ruled line. The perspective view of the packaging body which concerns on another example. FIG. 5 is a cross-sectional view showing another example of the translucent part. The perspective view which shows one step of obtaining the sheet material for the packaging body which concerns on another example. The cross-sectional view which shows the sticking state of the sticking margin portion of the sheet material shown in FIG. The perspective view of the packaging body which concerns on another example. Perspective view of a conventional package.

An embodiment for carrying out the present invention will be described below with reference to the drawings.

The packaging body of the present invention is a so-called window-opening carton or window-opening box having a light-transmitting portion that allows the inside to be seen through, and is used for packaging various products such as cosmetics.

FIG. 1 shows an example of the package 11. The package 11 is an assembly type formed in a rectangular parallelepiped box shape. The translucent portion 12 is formed on both the front surface and the left and right side surfaces of the four side surfaces around the waist of the package 11. The shape of the translucent portion 12 in this example is square.

The light-transmitting portion 12 is made of a transparent film that closes the window hole 13 formed through the light-transmitting portion 12.

FIG. 2 is a cross-sectional view of a portion having the translucent portion 12. As shown in this figure, the sheet material 14 constituting the package 11 is an opaque base sheet 15, a transparent surface film 16 attached to the surface 15a of the base sheet 15, and the base sheet 15. It is composed of a transparent back surface film 17 attached to the back surface 15b. The translucent portion 12 is composed of the front surface film 16 and the back surface film 17 that close the window hole 13 formed through the base material sheet 15 as described above.

In the light transmitting portion 12, the front surface film 16 and the back surface film 17 are bonded to each other in the window hole 13, and the front surface film 16 is flat along the surface 15a of the base sheet 15. Contrary to the illustration in FIG. 2, the back surface film 17 may be flattened along the back surface 15b of the base sheet 15.

FIG. 3 is a developed view showing the entire sheet material 14. As shown in this figure, the sheet material 14 is for a so-called caramel type general packaging box, has flaps 21 inserted vertically, and has a strip-shaped side surface portion 22 that can be bent into a square tube shape. , Has a sticking allowance piece 23 formed at one end of the side surface portion 22. In the figure, 24 is a lid portion, 25 is a bottom lid portion, and 26 is an inner flap.

As described above, the translucent portion 12 is formed in the portions 22a and 22b corresponding to the front surface and the left and right side surfaces.

Further, a folding ruled line 27 is formed at the bending position of the sheet material 14.

The manufacturing process of such a sheet material 14 will be described with reference to FIGS. 4, 5, 6, and 7.

The manufacturing method includes a window hole forming step, a film pasting step, and a cutting step in order.

First, in the window hole forming step, as shown in FIG. 4, the window hole 13 is punched and formed at a necessary position in the base sheet 15. That is, the window hole 13 is formed at a position on the rectangular base sheet 15 that should later become the translucent portion 12.

Although FIG. 4 shows an embodiment in which one sheet material 14 is obtained from one base material sheet 15, a plurality of sheet materials 14 may be obtained from one base material sheet 15. ..

In the next film attaching step, the front surface film 16 is attached to the front surface 15a of the portion of the base sheet 15 having at least the window hole 13, and the back surface film 17 is attached to the back surface 15b. The front surface film 16 and the back surface film 17 are provided on the entire surface of the base sheet 15.

Here, the materials of the base sheet 15, the front surface film 16 and the back surface film 17 will be described.

As the base sheet 15, an appropriate material such as a paperboard, a resin sheet, or a composite sheet thereof can be used depending on the purpose. When plastic is used, it is preferable to use a material having a small environmental load, such as so-called biomass plastic or a material using limestone as a main raw material.

An appropriate sheet can be used for the surface film 16, but OPP (biaxially stretched polypropylene), OPET (biaxially stretched polyester), ONY (stretched polyamide), PS (polystyrene), cellophane, etc. with good transparency are used. can. The thickness of the surface film 16 is preferably, for example, 10 μm to 100 μm degrees.

The back surface film 17 can be made of the same material as the front surface film 16. The thickness of the back surface film 17 may be thicker than that of the front surface film 16, and for example, one having a degree of 10 μm to 200 μm can be used.

When both the front surface film 16 and the back surface film 17 use plastic, it is preferable to use a material having a small environmental load.

FIG. 5 shows the pasting process. In this way, pasting is performed by laminating using a pair of rollers 31 and 32 made of rubber. This film sticking step is performed by making a difference in hardness between the front surface side roller 31 that presses the front surface film 16 against the base material sheet 15 and the back surface side roller 32 that presses the back surface film 17 against the base material sheet 15.

That is, as described above, the front surface film 16 and the back surface film 17 are bonded to each other, and the light transmissive portion 12 in which the front surface film 16 is flat along the surface 15a of the base sheet 15 is formed on the front surface side roller 31 and the back surface side roller. It is obtained by using a film harder than 32.

The processing conditions may be in a general range. For example, the processing speed may be about 1 meter / minute, and the temperatures of the rollers 31 and 32 may be about 120 degrees.

FIG. 6 is a perspective view of the base film 15 in which the front surface film 16 and the back surface film 17 are integrated.

In the subsequent cutting step, the base sheet 15 to which the front surface film 16 and the back surface film 17 are attached is cut into a required shape, and a bent ruled line 27 is formed.

For cutting, punching is performed at a predetermined contour position shown by a virtual line in FIG. At the same time as this outer shape processing is performed, a bent ruled line 27 is formed at a portion corresponding to the bent position inside the contour position, as shown by the alternate long and short dash line in FIG.

As shown in an enlarged view in FIG. 7, the bent ruled line 27 has a deep portion 27a having a deep depth and a shallow portion 27b having a depth shallower than the deep portion 27a, and has a structure in which the deep portions 27a and the shallow portions 27b are alternately arranged. be. The deep portion 27a breaks the surface film 16 and is formed in a V-shaped cross section up to the middle of the base sheet 15. The shallow portion 27b is formed in a substantially U-shaped cross section as a whole with a substantially flat bottom surface at a depth halfway through the base sheet 15 which is shallower than the deep portion 27a. By forming the surface film 16 into a substantially U-shaped cross section as a whole, it is possible to prevent the surface film 16 from being torn or damaged during the pressing force processing.

It is desirable that the width W of the bent ruled line 27 is in the range of 1 to 3 times the thickness t of the entire sheet material 14. If it is narrower than 1 times, the bendability is inferior. On the other hand, if it is wider than 3 times, the appearance is impaired and the pressing force must be increased during the bending ruled line processing.

The depth D1 of the deep portion 27a is preferably 50% or more of the thickness t of the entire sheet material 14. This is to obtain good bendability.

It is desirable that the depth D2 of the shallow portion 27b is within a range of about 2 to 10 times that of the surface film 16. If it is shallower than 2 times, the bendability is not good, and if it is deeper than 10 times, the strength may deteriorate.

It is desirable that the lengths L1 and L2 of the deep portion 27a and the shallow portion 27b in the direction in which the bent ruled line 27 extends are each in the range of 0.5 to 6 times the thickness t of the entire sheet material 14. If it is shorter than 0.5 times, the bent ruled line 27 portion is likely to be weakened and the sustainability is deteriorated. On the other hand, if it exceeds 6 times, the appearance is inferior.

In the package 11 configured as described above, the rigidity of the window hole 13 and the translucent portion 12 is increased by the front surface film 16 and the back surface film 17 attached to both the front and back surfaces of the base sheet 15. That is, the front surface film 16 and the back surface film 17 are in close contact with each other, and the edge portion of the window hole 13 is restrained by the front surface film 16 and the back surface film 17. Therefore, the translucent portion 12 can be effectively tensioned, and the window portion 102 such as the conventional packaging body 101 shown in FIG. 13 is formed by attaching a transparent film to only one side of the window portion 102. Rippling can be suppressed.

In this way, it is possible to suppress the occurrence of factors that adversely affect the appearance, obtain a beautiful appearance, and since there is no waviness in the translucent portion 12, it is possible to improve the visibility inside and enhance the appealing effect. You can also do it.

Further, the front surface film 16 and the back surface film 17 have a function of suppressing the window holes 13 of the base sheet 15 from absorbing moisture. Therefore, the beauty obtained at the time of manufacturing can be maintained.

Moreover, in the packaging body 101 having the conventional structure, the size of the window portion 102 on one flat surface has been limited in order to secure the rigidity around the window portion 102 and improve the appearance as much as possible. However, since the translucent portion 12 of the package 11 of the present invention has rigidity, a large translucent portion 12 can be obtained by increasing the ratio of the width of the translucent portion 12 in one plane.

For the same reason, even if the light-transmitting portions 12 are formed on two adjacent surfaces as in the package 11 shown in FIG. 8, a beautiful and highly visible package 11 can be obtained. Further, when the front surface film 16 and the back surface film 17 are combined and thickened, the bent portion becomes a right angle by providing the bent ruled line 28 between the two adjacent surfaces, and the display effect at the store is enhanced.

Further, the package 11 has the fold ruled line 27 as described above, and the foldability at the time of assembly and the appearance at the time of fold are good. Can contribute.

Since the front surface film 16 and the back surface film 17 are provided on the entire surface of the base sheet 15, rigidity and tension can be imparted not only to the translucent portion 12 but also to the entire surface. It is also possible to improve the protective performance of the packaging body 11 itself and the internal products.

Further, when the front surface film 16 and the back surface film 17 are bonded together, the back surface film 17 is made thicker than the front surface film 16 so that the translucent portion 12 is deformed in a convex shape even when the contents hit the translucent portion 12 during transportation or the like. It can be prevented from being torn. Making the back surface film 17 thicker than the front surface film 16 has better bendability at the fold ruled line than making the front surface film 16 thicker than the back surface film 17.

Other examples will be described below. In this description, the same parts as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 9 is a cross-sectional view showing another example of the specific structure of the translucent portion 12. In FIG. 9A, the front surface film 16 and the back surface film 17 are bonded to each other in the window hole 13, and the bonding surface between the front surface film 16 and the back surface film 17 is in the middle of the wall thickness of the base film 15. This is an example of location. Such a translucent portion 12 can be obtained by making the hardness of the pair of rollers 31 and 32 used in the pasting step the same and making them softer.

FIG. 9B is an example in which the front surface film 16 and the back surface film 17 are separated from each other in the window hole 13. Such a translucent portion 12 can be obtained by making the hardness of the pair of rollers 31 and 32 used in the pasting step the same and making them harder.

FIG. 10 is a perspective view showing a part of a process of obtaining a sheet material 14 for forming the packaging body 11 according to another example. This figure shows the state during the transition from the pasting process to the cutting process. That is, the plan view shape of the sheet material 14 is the same as that of the above-mentioned example, and it is a caramel type assembly type. At one end of the side surface portion 22, the other end of the side surface portion 22, that is, the attachment allowance piece 23 to be attached to another portion is provided.

The packaging body 11 of this example is composed of a front surface film 16 and a back surface film 17 in which the attachment allowance pieces 23 are attached to each other. Therefore, the portion having the sticking allowance piece 23 is thinner than the other portions.

In FIG. 10, the virtual line is a contour line for performing outer shape processing, and the alternate long and short dash line is a position where a bent ruled line 27 is formed. No folding ruled line is required between the sticking allowance piece 23 and the side surface portion 22.

Such a sheet material 14 has the thickness of the sticking allowance piece 23 when the sticking allowance piece 23 is attached to the opposite portion of the side surface portion 22 to form an annular shape and the side surface portion 22 has a flat shape before assembly. Is thinner than the other parts, so that the thickness of the pasted part can be suppressed as shown in FIG.

Therefore, even if the sheet materials 14 are stacked, it is possible to prevent the translucent portion 12 from being unexpectedly deformed due to an unexpected step. From this point as well, the package 11 having a beautiful appearance can be obtained.

FIG. 12 is a perspective view showing an example of another form of the package 11, and the package 11 in this figure is configured in a flat envelope shape suitable for packaging such as a handkerchief. The light transmitting portion 12 is largely formed in the center of the square surface.

The above configuration is a configuration for carrying out the present invention, and the present invention is not limited to the above-mentioned configuration, and other configurations can be adopted.

For example, the shape of the translucent portion 12 can be freely set to a shape other than the square.

The front surface film 16 and the back surface film 17 may be provided on the entire surface of the base sheet 15, or may be provided only on the portion that closes the window hole 13. In this case, in addition to being able to reduce the amount of resin used, it is also possible to obtain advantages such as being able to utilize the material of the base sheet as needed.

Further, the base sheet 15 is not an opaque material, but may be a transparent material printed or the like to make a part or all opaque.

Further, a decorative member such as gold powder or dried flower may be sandwiched between the front surface film 16 and the back surface film 17, or between the front surface film 16 and the base sheet 15.

11 ... Package 12 ... Transmissive part 13 ... Window hole 15 ... Base sheet 15a ... Front surface 15b ... Back side 16 ... Front surface film 17 ... Back side film 23 ... Pasting allowance 27 ... Bending ruled line 31 ... Front side roller 32 ... Back side Side roller

Claims (10)

A packaging body made of a base material sheet having a penetrating window hole and having a transparent portion made of a transparent film formed in the window hole.
A package in which the translucent portion is composed of a front surface film attached to the front surface of the base material sheet and a back surface film attached to the back surface of the base material sheet. The package according to claim 1, wherein the front surface film and the back surface film are provided on the entire surface of the base material sheet. The package according to claim 1, wherein the front surface film and the back surface film are provided only on a portion of the base material sheet that closes the window hole. The package according to any one of claims 1 to 3, wherein the front surface film and the back surface film are joined to each other in the window hole. In the window hole, the front surface film and the back surface film are bonded to each other and
The package according to any one of claims 1 to 3, wherein the front surface film or the back surface film is flat along the surface of the base material sheet. The package according to any one of claims 1 to 3, wherein the front surface film and the back surface film are separated from each other in the window hole. It is an assembly type that has a sticking allowance that can be stuck to other parts, and is assembled and used.
The package according to any one of claims 1 to 6, wherein the sticking allowance is composed of the front surface film and the back surface film that are bonded to each other. A folding ruled line for folding is formed, and at the same time,
The bent ruled line has a deep portion having a deep depth and a shallow portion having a depth shallower than the deep portion, and the cross-sectional shape of the shallow portion is substantially U-shaped, and the deep portion and the shallow portion are arranged alternately. The package according to any one of claims 1 to 7, which is a structure. A window hole forming process for punching and forming a window hole at a required location on the base sheet,
A film pasting step of sticking a front surface film on the front surface of at least a portion of the base material sheet having the window hole and a back surface film on the back surface,
A method for producing a package, which comprises a cutting step of cutting the base material sheet to which the front surface film and the back surface film are attached into a required shape and forming a folded ruled line. The film sticking step is performed by pressurization by a front side roller that presses the front surface film against the base material sheet and a back surface side roller that presses the back surface film against the base material sheet.
The method for manufacturing a package according to claim 9, wherein the film sticking step is performed with a difference in hardness between the front surface side roller and the back surface side roller.

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