JPH10211919A - Simple container made of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To intercept a light beam which causes deterioration of contents, enable the check of metallic foreign matter by a metal detector, and dispose of it after use without problem, by forming an ink film for intercepting a light beam in a specific wavelength range onto the surface of at least one of two sheets of paper which are bonded and on the side which is joined to the other sheet of paper. SOLUTION: A coat layer 23 is formed on the external surface of outside paper 21. The cost layer 23 comprises casein incorporating titanium oxide, and functions as the layer which improves printability on the external surface of the outside paper 21. On the other hand, on the internal surface of the outside paper 21, a print layer 24 is formed. The outside paper 21 with the print layer 14 formed on its internal surface is joined to inside paper 22 via an adhesive layer 25. Further, a laminate film 26 comprising of a polyethylene film is joined to the internal surface of the inside paper 22, the side which contacts with contents. In this structure, the print layer on the surface of the joint side of the outside paper prevents a light beam from passing inside via a container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple paper container, and more particularly to a simple paper container mainly made of paper.

[0002]

2. Description of the Related Art Disposable simple paper containers are widely used for filling and supplying various foods and beverages. This type of simple container has a structure in which, for example, a fan-shaped base paper is wound into a truncated cone shape, and the bottom opening is closed by a circular bottom plate, and the inside is filled with various foods and beverages. The upper opening is sealed with a lid material, or the lid is attached to the upper opening for distribution.

[0003] Such a simple paper container can be supplied at a relatively low cost. Further, after use, it can be incinerated and is unlikely to cause waste pollution such as a synthetic resin container, so that it is widely used for a wide range of applications.

[0004]

When such a simple paper container is filled with, for example, ice cream mixed with matcha, light is transmitted through the body of the simple paper container and the light in the ice cream is removed. Alters matcha. When light is applied to the green tea mixed in the ice cream, the green tea turns brown, and the fragrance flies and the flavor deteriorates.

FIG. 9 shows a light transmission characteristic of a conventional paper container used conventionally. As is clear from these characteristics, it has been confirmed that ordinary paper simple containers almost transmit light having a wavelength of approximately 400 nm or more.

[0006] Like ice cream mixed with matcha,
When the quality of the contents deteriorates when irradiated with a light beam, a simple container in which aluminum foil is laminated is used. As shown in FIG. 10, the simple paper container on which the aluminum foil is laminated can completely block light beams in almost all wavelength ranges from the ultraviolet region to the infrared region. Therefore, according to the paper simple container made of paper laminated with aluminum foil, deterioration of the contents due to light can be prevented.

[0007] On the other hand, at the time of usual filling of foods, a metal detector is used after the filling and packaging to check whether or not foreign matter of metal is mixed in the contents.
However, in the case where food is packaged using a simple paper container laminated with aluminum foil, there is an inconvenience that it is not possible to check for metal foreign substances using the above-described metal detector. Further, simple paper containers laminated with aluminum foil cannot be incinerated, leaving a problem in refuse disposal after use.

The present invention has been made in view of such a problem, and it is possible to block a light beam that degrades the contents and check a metal foreign substance with a metal detector.
Moreover, an object of the present invention is to provide a simple paper container that does not cause a problem in disposal after use.

[0009]

According to the present invention, there is provided a simple paper container mainly made of paper, wherein a main part of the simple paper container is formed of laminated paper of two sheets of paper. A simple paper-made container characterized in that an ink film that blocks light in a predetermined wavelength range is formed on a surface of at least one of the papers and a bonding surface with the other paper. It is.

[0010] The ink film may block light rays in a wavelength range that alters the content to be filled therein. Further, the ink film may be made of black ink, and may substantially block light of all wavelengths from an ultraviolet region to an infrared region. Further, the black ink constituting the ink film may contain carbon black.

[0011] The ink film formed on the surface of at least one of the two sheets of paper is absent in a region near the end face in contact with the contents, and the ink film is formed on the end face of the paper at the end face of the container. It may not be exposed inside.
Alternatively, the printing on the outer surface of the container may correspond to the ink film on the bonding surface so that the ink film on the bonding surface is not exposed to the inside of the container at the end face of the paper.

The overall shape is substantially cup-shaped, and the fan-shaped base paper constituting the body part and the circular base paper constituting the bottom are both constituted by two sheets of laminated paper. The ink film may be formed on the surface of one of the papers.

[0013]

1 and 2 show a simple paper container according to an embodiment of the present invention. This simple paper container may be, for example, a simple paper container for filling and supplying ice cream.

Such a simple paper container is formed in a substantially cup-like shape, and the body 10 has a truncated cone shape. And the upper end of the body 10 is an upper opening 11,
The curl portion 12 is formed by wrapping the periphery of the upper opening 11 outward.

On the other hand, such a simple paper container has its bottom opening closed by a bottom plate 16. The outer peripheral portion of the bottom plate 16 is bent downward to form a peripheral wall portion 17. The peripheral wall portion 17 is formed by folding the lower end portion of the trunk 10 and the lower end portion of the trunk 10. The bottom plate 16 is connected to the lower end side of the body 10 so that the lower opening is closed by the bottom plate 16.

FIG. 3 is an exploded view of such a container, in particular, a fan-shaped paperboard base paper for forming a portion of the cylinder 10. FIG. 4 shows a cross section of the fan-shaped base paper 22 or the base paper constituting the bottom plate 16. That is, the base paper has a two-layer structure of the outer paper 21 and the inner paper 22, and a simple paper container can be assembled from the base paper formed by laminating two sheets of paper.

On the outer surface side of the outer paper 21, a coating layer 23 is provided.
Are formed. The coat layer 23 is made of casein into which titanium oxide is kneaded, and forms a layer for improving the printability of the outer surface of the outer paper 21. On the other hand, a printing layer 24 is formed on the inner surface of the outer paper 21. The outer paper 21 having such a printed layer 24 formed on the inner surface is bonded to the inner paper 22 via an adhesive layer 25. A laminated film 26 made of a polyethylene film is bonded to the inner surface of the inner paper 22 which is in contact with the contents.

A feature of the present embodiment is a printing layer 24 formed on the surface of the outer paper 21 on the bonding surface side. The printed layer 24 is intended to prevent light rays from penetrating inside through the container.

FIG. 5 shows the light transmission characteristics of the base paper when the red ink is applied as the printing layer 24. Comparing this characteristic with the transmission characteristic of the container having no ink layer shown in FIG. 9, it is clear that the light in the region of 700 nm or less is blocked. FIG. 6 shows light transmission characteristics of the base paper when the printing layer 24 made of indigo ink is formed. According to this characteristic, although a small peak appears around 470 nm, light in a wavelength range of 750 nm or less is almost blocked. FIG. 7 shows the light transmission characteristics of the base paper when the printing layer 24 is formed with green ink. Here, although a small peak appears around 520 nm, it is possible to cut off almost all light rays of 800 nm or less.

FIG. 8 shows light transmission characteristics when black ink mixed with carbon black is used as the printing layer 24. As is apparent from this characteristic, it is clearly shown that light of all wavelengths from the ultraviolet region to the infrared region can be substantially blocked. That is, this characteristic is shown in FIG.
Are substantially the same as the light transmission characteristics of the container having the joint structure of aluminum foil and paper shown in FIG.

Thus, by forming the printing layer 24 using a black ink mixed with carbon black on the surface of the outer paper 21 on the joining surface side, almost the same optical properties as those of a container laminated with aluminum foil. Can be provided. Therefore, especially when filling foods and beverages whose contents are liable to be degraded by the transmission of light rays, the printing layer 2 of black ink mixed with carbon black is used.
4 is preferably formed.

Further, as shown in FIG. 3, such a printing layer 24 is omitted at the side end portion of the fan-shaped base paper which is in contact with the contents. As described above, since the printing layer 24 is absent near the end surface 30 on the side in contact with the contents, as shown in FIG. Since the printing layer 24 is not present, the ink constituting the printing layer 24 is prevented from contacting or eluting the contents. The lack of the printing layer 24 in the vicinity of the end face 30 is because the base paper is wound twice in this part, so that the light shielding property can be maintained by the printing layer 24 of the base paper on the outer part, and the shielding performance of the entire container is achieved. Does not impair.

As described above, the simple paper container according to the present embodiment uses the printing layer 24 made of an ink film as an optical filter for base paper constituting a general cup to block light in a specific wavelength range. It was made. For example, when it is necessary to block the entire region from ultraviolet rays to infrared rays, such as green tea mixed in ice cream, use black ink mixed with carbon black having the characteristics shown in FIG. ing.

Further, such a printed layer is formed of two sheets of paper 2 so that the printed color is not exposed on the surface of the container and has the same appearance as a simple paper container having no printed layer 24 formed thereon.
1 and 22, and a printing layer 24 is formed on the surface of one paper 21 on the bonding surface side, so that the printing layer 24 becomes an intermediate layer between the two papers 21 and 22. (See FIG. 4).

Further, as shown in FIG. 3, the printing layer 24 is absent near the end face 30 exposed to the contents so as to prevent the printing layer 24 from being exposed inside.

Here, the printing layer 24 on the end face 30 side is used.
In order not to expose the printing paper 24, the printing on the outer surface of the outer paper 21 and the printing on the print layer 24 may be made to correspond to each other. Since printing on the outer surface of the outer paper 21 is duplicated near the end face 30, it is usual to omit printing on this portion. Accordingly, in response to such a lack of printing on the outside, the printing on the inside printing layer 24 is also absent.
Is prevented from being exposed to the inside of the container. Thereby, the printed layer 24 does not stain the contents.

When it is desired to block light in a specific wavelength range,
An ink having a color that can block light in such a wavelength range may be used. For example, red ink shown in FIG. 5, indigo ink shown in FIG. 6, or green ink shown in FIG. May be. Such an ink blocks both light in a region other than the color tone and light in a short wavelength region.

On the other hand, when it is necessary to block the entire wavelength range from short wavelength to long wavelength, black ink mixed with carbon black having the characteristics shown in FIG. 8 may be printed. Such a printed layer 24 is provided on the inner surface side of the outer paper 21 or the outer surface side of the inner paper 22 and the inner and outer papers 2.
By forming it on the surface on the joining surface side of 1, 22, a container that is not different from ordinary paper in appearance can be provided.

Such a simple paper container does not hinder the use of a metal detector because it is not a laminate of paper and aluminum foil. In the usual food filling process, after the filling is completed, an inspection is performed using a metal detector to determine whether or not a foreign substance made of metal is mixed in the contents. Such an inspection can be applied to the paper-made simple container according to the present embodiment in which the printed layer 24 is formed, and it becomes possible to detect and repel food containing metal foreign matter.

Further, such a simple paper container does not have a light-shielding property by bonding an aluminum foil, but merely forms the printed layer 24, which causes inconvenience when incinerated. Absent. Further, since such a paper has the print layer 24 formed on the inner surface of the outer paper 21, it can be reused and recycled by performing the same reproduction as a normal print paper. .

According to the paper-made simple container according to the present embodiment, it is possible to suppress the discoloration and flavor deterioration of foods such as yogurt and ice cream using a pigment or a high fat which easily discolors by light.

[0032]

As described above, according to the present invention, the main part of the simple paper container is constituted by a laminated paper of two papers.
An ink film is formed on at least one surface of the sheets of paper and at a joint surface with the other paper to block light rays in a predetermined wavelength range.

Therefore, according to the present invention, it becomes possible to block light in a predetermined wavelength range by the ink film, and the blocking of such light prevents deterioration or deterioration of the contents.

According to the configuration in which the ink film blocks light in a wavelength range that alters the content of the ink,
Deterioration of the contents due to light rays is effectively and reliably prevented.

According to the structure in which the ink film is made of black ink and almost blocks all the wavelengths from the ultraviolet region to the infrared region, it is possible to reliably block the light beams in the above wavelength range. become.

According to the configuration in which the black ink forming the ink film contains carbon black, it is possible to block light rays in almost all wavelength ranges by the black ink containing carbon black.

The ink film formed on the surface of at least one of the two sheets of paper is absent in a region near the end face in contact with the contents, and the ink film is formed inside the container at the end face of the paper. According to this configuration, the ink film does not come into contact with the content, thereby preventing the content of the content from being stained or deteriorated by the ink constituting the ink film.

According to the configuration in which the printing on the outer surface of the container and the ink film on the bonding surface correspond to each other so that the ink film on the bonding surface is not exposed to the inside of the container on the end surface of the paper, the ink film on the bonding surface side Is easily controlled.

The overall shape is substantially cup-shaped, and the fan-shaped base paper constituting the body part and the circular base paper constituting the bottom are both composed of two sheets of laminated paper. According to the configuration in which the ink film is formed on the surface of one of the papers, it is possible to provide a cup-shaped simple container that can block light in a predetermined wavelength range or all wavelength ranges. .

[Brief description of the drawings]

FIG. 1 is an external perspective view of a simple paper container.

FIG. 2 is a vertical sectional view of the main 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 red ink.

FIG. 6 is a graph showing the light transmittance of a simple paper container having a printing layer made of indigo ink.

FIG. 7 is a graph showing light transmittance of a simple paper container having a printing layer made of green ink.

FIG. 8 is a graph showing light transmittance of a simple paper container having a printing layer made of black ink mixed with carbon black.

FIG. 9 is a graph showing light transmittance of a conventional simple paper container having no printing layer.

FIG. 10 is a graph showing light transmittance of a simple paper container laminated with aluminum foil.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 trunk 11 upper opening 12 curl portion 16 bottom plate 17 peripheral wall portion 18 folded portion 21 outer paper 22 inner paper 23 coat layer 24 print layer 25 adhesive layer 26 laminated film (polyethylene) 30 end face

Claims (7)

[Claims] 1. A simple paper container mainly made of paper, wherein a main part of the simple paper container is made of a laminated paper of two sheets of paper and at least one of the two sheets of paper. A simple paper-made container, wherein an ink film for blocking light rays in a predetermined wavelength range is formed on a surface of a paper and a bonding surface with the other paper. 2. A simple paper container according to claim 1, wherein said ink film blocks light rays in a wavelength range that degrades the contents filled therein. 3. The ink film according to claim 2, wherein the ink film is made of black ink.
2. The simple paper container according to claim 1, wherein light of all wavelengths from the ultraviolet region to the infrared region is substantially blocked. 4. The simple paper container according to claim 3, wherein the black ink constituting the ink film contains carbon black. 5. An ink film formed on a surface of at least one of the two sheets of paper is lacking in a region near an end face in contact with contents, and the ink film is formed on an end face of the paper. The simple paper container according to any one of claims 1 to 4, wherein the paper simple container is not exposed to the inside of the container. 6. The printing method according to claim 1, wherein the printing on the outer surface of the container and the ink film on the bonding surface correspond to each other so that the ink film on the bonding surface is not exposed to the inside of the container at the end face of the paper. 6. The paper simple container according to 5. 7. The whole shape is substantially cup-shaped, and the fan-shaped base paper constituting the body part and the circular base paper constituting the bottom part are both formed of laminated paper of two sheets, and are joined. The simple paper container according to claim 1, wherein the ink film is formed on the surface of one of the papers.