JP4740433B2 - Simple paper container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a simple paper container, and more particularly to a simple paper container made mainly of paper.
[0002]
[Prior art]
In order to fill and supply various foods and beverages, disposable paper-made simple containers are widely used. This type of simple container has a structure in which, for example, a fan-shaped base paper is wound to form a truncated cone shape, and the bottom opening is closed by a circular bottom plate, and various foods and beverages are filled therein. The upper opening is sealed with a lid material, or is attached to a lid for distribution.
Such a simple paper container can be supplied at a relatively low cost. In addition, after use, it can be incinerated and it is difficult to generate waste pollution such as a synthetic resin container, so it is widely used for a wide range of applications.
[0003]
When ice cream mixed with, for example, green tea is filled and supplied with such a simple paper container, the light rays pass through the body portion of the simple paper container and the green tea in the ice cream is altered. When light is applied to the matcha tea mixed in ice cream, it turns brown and the scent flies and the flavor deteriorates. In addition, it has been confirmed that a normal paper simple container substantially transmits light having a wavelength of about 400 nm or more.
[0004]
If the quality of the contents deteriorates when irradiated with light, such as ice cream mixed with green tea, a simple container in which aluminum foil is laminated is used. A simple paper container laminated with aluminum foil can completely block light in almost all wavelengths from the ultraviolet region to the infrared region. Therefore, according to the simple paper container manufactured from the paper laminated with the aluminum foil, the deterioration of the contents due to light can be prevented.
[0005]
On the other hand, when filling normal foods, use a metal detector to check whether or not metal foreign matter is mixed in the contents after filling and packaging. Yes. However, when food is packaged using a simple paper container laminated with aluminum foil, there is an inconvenience that metal foreign objects cannot be checked using the metal detector as described above. Further, the simple paper container laminated with the aluminum foil cannot be disposed of by incineration, leaving a problem in waste disposal after use.
[0006]
Accordingly, the inventors of the present application have a double structure for the paper constituting the container, as disclosed in Japanese Patent Application Laid-Open No. 10-211919, and a printing layer is formed on the surface of one of the papers on the bonding surface side of these papers. The printed layer is used to block light in a predetermined wavelength range or the entire wavelength range.
[0007]
FIG. 6 shows the structure of the base paper of the barrel portion of such a container. The barrel portion is composed of an outer base paper 1 and an inner base paper 2, and a coat layer is formed on the outer surface of the outer base paper 1. 3 is formed, and a printed layer 4 is formed on the inner surface of the outer base paper 1, and the printed layer 4 is bonded to the inner base paper 2 through the adhesive layer 5. A laminate film 6 is bonded to the inner surface of the inner base paper 2.
[0008]
[Problems to be solved by the invention]
According to the conventional simple paper-made container having such a light-shielding structure, a simple container made of a single layer of paper is formed by a base paper having a two-layer structure of an outer base paper 1 and an inner base paper 2. There is a problem that the rigidity is too high compared to the above, and molding becomes very difficult. In addition, since the use amount of the base paper increases when the two-layer structure is used, this causes an increase in cost. In addition, in a simple container having a two-layer structure, when trying to reduce the rigidity in order to facilitate molding, thin base papers 1 and 2 are used, respectively, but since high quality and thin base papers must be used, Further, the cost increases.
[0009]
Further, when the container having such a structure forms a black ink layer capable of blocking light in a wide wavelength range as the printed layer 4 formed between the outer base paper 1 and the inner base paper 2, Such a black ink layer can be seen through from the inner side through the outer base paper 1, and the appearance of the container is darkened, thereby deteriorating the appearance of the container. In particular, when the thickness of the outer base paper 1 is reduced in consideration of formability, there is a problem that this tendency becomes remarkable.
[0010]
The present invention has been made in view of such problems, and an object of the present invention is to provide a simple paper-made container that is easy to mold, has no black appearance, and has light shielding properties.
[0011]
[Means for Solving the Problems]
One invention of the present application is a simple container mainly made of paper,
A black ink layer in which carbon black that blocks light in the entire wavelength region from the ultraviolet region to the infrared region is mixed is formed on the outer surface of the base paper container constituting at least the main part of the simple container. ,
The color ink layer of high brightness on the surface of a on the outer surface on the outside of the container of the ink layer of the black is formed such that the outer surface side of the container, by該明degree high color ink layer We hide the color of the ink layer of the black blocking light of the entire wavelength range,
The present invention relates to a simple paper container characterized in that a coat layer is formed on the outer side of the ink layer having a high lightness to improve printability when printing on the outer surface .
[0012]
Here, the base paper may be a high-quality paper made of a single layer of pulp. In addition, an ink layer that forms a cup shape and blocks light rays in the entire wavelength region and an ink layer having a high brightness on the outer surface on the outer side of the container of the base paper that constitutes at least the body portion, A high color ink layer may be formed on the outside. Moreover, it is preferable that the ink layer of the color with high brightness formed on the outer side of such an ink layer is a white ink layer.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a simple paper container according to an embodiment of the present invention. This simple paper container may be a simple paper container for filling and supplying ice cream, for example.
[0014]
Such a simple paper container is configured in a cup shape, and the body 10 has a truncated cone shape. The upper end of the body 10 is an upper opening 11, and the curled portion 12 is formed by winding the periphery of the upper opening 11 outward.
[0015]
On the other hand, the bottom opening of such a simple paper container is closed by the bottom plate 16. A portion on the outer peripheral side of the bottom plate 16 is bent downward to form a peripheral wall portion 17, and the peripheral wall portion 17 is folded back at a lower end portion of the barrel 10 and a lower end portion of the barrel 10. The bottom plate 16 is coupled to the lower end side of the body 10, and the lower opening is closed by the bottom plate 16.
[0016]
FIG. 3 shows an unfolded fan-shaped paperboard for forming the barrel 10 of such a container. FIG. 4 shows a section of the base paper constituting the fan-shaped base paper 21 or the bottom plate 16. That is, here, both the portion of the container body 10 and the portion of the bottom plate 16 are formed using a single layer of base paper.
[0017]
The structure of such a paperboard will be described with reference to FIG. 4. The base paper 21 is a high-quality paper made of pulp, for example, 200 g / m ² , and a black printing ink layer 22 is formed thereon. Here, in the present embodiment, carbon black is mixed, and the ink layer 22 is mixed with carbon black.
[0018]
A white printing ink layer 23 is formed on the upper side of the ink layer 22. A coat layer 24 is formed outside the white ink layer 23. Here, the coat layer 24 is composed of casein kneaded with titanium oxide, and constitutes a layer for improving printability when printing on the outer surface thereof. On the other hand, a laminate film 25 made of a polyethylene film is bonded to the inner surface side of the base paper 21 and the side in contact with the contents.
[0019]
FIG. 5 shows the light transmission characteristics of the base paper 21 having such two printed layers 22 and 23. As is clear from this transmission characteristic, the base paper for forming the container of the present embodiment can almost completely block light in all wavelength regions from the ultraviolet region to the infrared region. That is, by forming the printing layer 22 using black printing ink mixed with carbon black on the outer surface of the base paper 21, it is possible to provide a container having almost the same optical properties as a container laminated with an aluminum foil. become. Therefore, it is preferable to form a black printing ink layer 22 in which carbon black is mixed, particularly when filling foods and beverages whose contents are easily altered by the transmission of light.
[0020]
As described above, the simple paper container of the present embodiment uses the printing layers 22 and 23 made of an ink film as an optical filter for the base paper constituting a general cup so as to block light in almost all wavelength ranges. It is a thing. Therefore, when the ice cream mixed with matcha is filled in such a container, the matcha in the ice cream is prevented from being altered or deteriorated by light from the outside.
[0021]
Moreover, since such a container includes the white printing ink layer 23 outside the printing ink layer 22 for blocking light, the color of the black ink layer 22 is not seen through. That is, the outer white ink layer 23 can prevent the appearance of the container from becoming dark. In addition, what is necessary is just to form on the coating layer 24, when printing on the outer surface of this container as needed. As described above, the coat layer 24 is composed of casein in which titanium oxide is kneaded, and good printing can be formed thereon.
[0022]
Further, such a simple container made of paper can be assembled by molding a single-layer base paper 21 as shown in FIG. 4, and thus is much more than when a base paper having a two-layer structure is used. Molding becomes easy, and it becomes possible to easily mold and assemble by the same method as that of a normal paper simple container. Therefore, the productivity of the paper simple container is not impaired.
[0023]
Moreover, such a simple container made of paper does not prevent the use of a metal detector because it does not use a base paper in which aluminum foil is laminated on paper. In a normal food filling process, after the filling is completed, a metal detector is used to check whether or not metal foreign matter is mixed in the contents. Such an inspection can be applied as it is in the simple paper container according to the present embodiment formed by the base paper 21 on which the print layers 22 and 23 are laminated, and detects food mixed with metal foreign matters. It becomes possible to pop out.
[0024]
In addition, such a simple paper container is not one in which aluminum foil is bonded to obtain a light-shielding property, but only a base paper 21 on which two printed layers 22 and 23 are formed. There is no inconvenience in doing. Further, since such paper is formed by forming the printing layers 22 and 23 on the outer surface of the base paper 21, it can be reused and recycled by performing the same reproduction as normal printing paper. .
[0025]
In the above embodiment, the black ink layer 22 mixed with carbon black is formed as the inner printing ink layer 22 for obtaining light shielding properties. However, when light in a specific wavelength region is to be blocked. In this case, an ink layer that absorbs light in the wavelength region may be formed. That is, it becomes possible to provide a simple paper container having a selective light shielding property according to the color of the applied ink layer.
[0026]
【The invention's effect】
According to one aspect of the present invention, in a simple container mainly made of paper, an ink layer that blocks light in a predetermined wavelength region is formed on the outer surface of the base paper container constituting at least the main part of the simple container. And an ink layer having a high lightness color formed on the outer surface of the ink layer and on the outer surface of the container, and the light layer having the high lightness blocks light in a predetermined wavelength region. The color of the layer is hidden .
[0027]
Therefore, according to such a simple paper container, it is possible to give the container the ability to block light in a predetermined wavelength region by an ink layer that blocks light in a predetermined wavelength region. Moreover, the color of the inner ink layer can be prevented from being seen through by the ink layer having a high brightness formed on the outer side.
[0028]
According to the configuration in which the base paper is high- quality paper made of a single layer of pulp , a simple paper container having light blocking properties can be efficiently manufactured without impairing the moldability of the container.
[0029]
A cup-shaped ink layer that blocks light of a predetermined wavelength on the outer surface of the base paper container that forms at least the body portion, and an ink layer having a high lightness, have a high lightness color. According to the configuration in which the ink layer is formed on the outer side, the function of blocking light in a predetermined wavelength range is given to the cylinder portion, and the ink layer that provides such a function is seen through from the outside. Nothing will happen.
[0030]
According to the configuration in which the ink layer that blocks light in a predetermined wavelength region is a black ink layer, it is possible to block light in almost all wavelength regions by such a black ink layer.
[0031]
According to the configuration in which the ink layer that blocks light in a predetermined wavelength range is a black ink layer mixed with carbon black, such an ink layer can almost completely block light in all wavelength ranges. .
[0032]
According to the configuration in which the color layer having a high lightness is a white ink layer, the white ink layer can prevent the ink layer for blocking the inner light from being seen through.
[0033]
According to the configuration in which the coat layer is formed on the outer side of the ink layer having a high brightness, such a coat layer can provide a good appearance and can perform good printing on the outer surface.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a simple paper container.
FIG. 2 is a longitudinal sectional view of the relevant part.
FIG. 3 is a developed plan view of a base paper of a simple paper container.
FIG. 4 is an enlarged sectional view of a base paper constituting a simple paper container.
FIG. 5 is a graph showing light transmittance of a simple paper container having a printing layer made of black ink mixed with carbon black.
FIG. 6 is an enlarged longitudinal sectional view of a base paper of a conventional simple paper container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer base paper 2 Inner base paper 3 Coat layer 4 Print layer 5 Adhesive layer 6 Laminate film 10 Cylinder 11 Upper opening 12 Curl part 16 Bottom plate 17 Peripheral wall part 18 Folding part 21 Base paper 22 Printing ink layer (black)
23 Printing ink layer (white)
24 Coat layer 25 Laminate film

Claims (4)

In a simple container made mainly of paper,
A black ink layer in which carbon black that blocks light in the entire wavelength region from the ultraviolet region to the infrared region is mixed is formed on the outer surface of the base paper container constituting at least the main part of the simple container. ,
The color ink layer of high brightness on the surface of a on the outer surface on the outside of the container of the ink layer of the black is formed such that the outer surface side of the container, by該明degree high color ink layer We hide the color of the ink layer of the black blocking light of the entire wavelength range,
A simple paper-made container, wherein a coat layer is formed on the outer side of the ink layer having a high lightness to improve printability when printing on the outer surface .   The simple paper container according to claim 1, wherein the base paper is a high-quality paper made of a single layer of pulp. An ink layer that forms a cup shape and blocks the light in all the wavelength regions on the outer surface of the base paper container that forms at least the body portion, and the ink layer of the light color has a high lightness. 2. The paper simple container according to claim 1, wherein the color ink layer is formed outside.   2. The simple paper container according to claim 1, wherein the color layer having a high brightness is a white ink layer.

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