JP2022064158A - Paper-made container and method for manufacturing the same - Google Patents

Abstract

To provide a technology that makes it possible to impart the necessary and sufficient antibacterial and antiviral action to paper-made container while suppressing the used amount of antibacterial and antiviral agents.SOLUTION: Provided is a paper-made container in which an antibacterial and antiviral agent-containing coating liquid is coated on the outer surface side of a cardboard box, which is a paper-made container, in a predetermined coating pattern 3. The coating pattern 3 includes a coated region 31 in which a coating liquid is coated, and a non-coated region 32 in which a coating liquid is not coated. And, in the coating pattern 3, when a reference circle F, which is defined as the thickness of a human finger, is placed at an arbitrary position within the coating pattern 3, at least a part of the reference circle F includes the coated region 31.SELECTED DRAWING: Figure 4

Description

The present invention relates to a paper container formed of a paper material (for example, various paper containers such as a corrugated cardboard box formed of corrugated cardboard and a paper container formed of paperboard).

Various paper containers such as a cardboard box formed of corrugated cardboard and a paper container formed of paperboard are widely used for packaging, packing, transporting, and storing various articles.

For example, in Patent Document 1, when nursing care products, hospital equipment, tableware, food, etc. are contained in a cardboard box, the inner surface side of the cardboard box is provided so that bacteria do not propagate in these containers. It is described to form an antibacterial layer.

Utility model registration No. 3117545

In recent years, due to changes in lifestyle triggered by the new corona virus infection, the number of people using mail-order sales using the Internet and delivery services at restaurants is increasing, and the consumption of paper containers such as cardboard boxes and paper containers is increasing. The amount is increasing rapidly.

On the other hand, due to the spread of the new coronavirus infection, people's awareness of infection prevention is increasing, and the outer surface of the cardboard box of the luggage delivered by the cardboard box and the products purchased at the store are put in it. An increasing number of people are concerned about the possibility of pathogenic microorganisms (viruses and fungi) adhering to the outer surface of cardboard boxes. For this reason, a paper container that has an action of inactivating a virus (antiviral action) and an action of suppressing or inhibiting the growth of bacteria (antibacterial action) is desired not on the inner surface side but on the outer surface side. Has been done.

However, in order to mass-produce paper containers having antiviral and antibacterial effects, a large amount of antiviral agents and antibacterial agents are required. In addition, as the amount of antibacterial / antiviral agents used in each paper container increases, the unit price of the paper container also increases.

The present invention has been made in view of the above problems, and is a technique capable of imparting necessary and sufficient antibacterial and antiviral effects to a paper container while suppressing the amount of antibacterial and antiviral agents used. The purpose is to provide.

The present invention has taken the following measures in order to achieve the above object.

That is, the present invention is a paper container, and a coating liquid containing an antibacterial / antivirus agent is applied to the outer surface side of the paper container in a predetermined coating pattern, and the coating liquid is applied to the coating pattern. A coating area to which the virus is applied and a non-application area to which the application liquid is not applied are included, and the application pattern is defined as the thickness of a human finger at an arbitrary position in the application pattern. When the circle is arranged, at least a part of the reference circle includes the coating region.

However, the "antibacterial / antiviral agent" refers to a substance having at least one of an antibacterial action (an action of suppressing or inhibiting the growth of bacteria) and an antiviral action (an action of inactivating a virus).

According to this configuration, the coating liquid containing the antibacterial / antiviral agent is applied in a coating pattern including the non-applied area, so that the amount of the antibacterial / antiviral agent used can be suppressed. Further, in this coating pattern, when a reference circle defined as the thickness of a human finger is arranged at an arbitrary position in the coating pattern, the coating region is included in at least a part of the reference circle. Therefore, when a human finger touches an arbitrary position in the coating pattern, at least a part of the finger touches the coating area. Therefore, even if the bacteria / virus adheres to the finger, the growth of the bacteria is inhibited by the action of the antibacterial / antiviral agent contained in the coating liquid applied to the coating area, and the virus is not present. Be activated. Further, around the coating area, a halo (growth inhibitory band) of the antibacterial / antiviral agent contained in the coating liquid coated here is formed. Since the action of the antibacterial / antiviral agent extends to this halo, even if some bacteria or virus adhere to the non-applied area, the growth of the bacteria is inhibited and the virus is likely to be inactivated. That is, by applying the coating liquid in such a coating pattern, sufficient antibacterial and antiviral effects can be expected. As described above, according to the above configuration, it is possible to impart the necessary and sufficient antibacterial / antiviral action to the paper container while suppressing the amount of the antibacterial / antiviral agent used.

Alternatively, the present invention is a paper container, in which a coating liquid containing an antibacterial / antivirus agent is applied to the outer surface side of the paper container in a predetermined coating pattern, and the coating liquid is applied to the coating pattern. An antibacterial / antivirus agent that includes a coating area to which the coating liquid is applied and a non-coating area to which the coating liquid is not applied, and the non-coating area is contained in the coating liquid coated on the coating area. It is characterized in that it is arranged in the area where the halo is formed.

However, the "halo" is a region formed around (periphery) the portion to which the antibacterial / antiviral agent is applied, and the antibacterial effect or (and) antiviral effect of the antibacterial / antiviral agent extends. It is an area (so-called growth inhibition zone).

According to this configuration, the coating liquid containing the antibacterial / antiviral agent is applied in a coating pattern including the non-applied area, so that the amount of the antibacterial / antiviral agent used can be suppressed. Further, since the non-applied area is arranged in the area where the halo of the antibacterial / antiviral agent applied to the applied area is formed, even if bacteria or viruses adhere to the non-applied area, the bacteria grow. Is inhibited and the virus is inactivated. That is, by applying the coating liquid in such a coating pattern, sufficient antibacterial and antiviral effects can be expected. As described above, even with the above configuration, it is possible to impart the necessary and sufficient antibacterial / antiviral action to the paper container while suppressing the amount of the antibacterial / antiviral agent used.

It is also preferable that the paper container is coated with the coating liquid based on the halftone dot pattern in the coating region.

According to this configuration, the amount of the coating liquid used (and thus the amount of the antibacterial / antiviral agent used) can be adjusted by adjusting the halftone dot area ratio in the halftone dot pattern. For example, if the halftone dot area ratio is 50%, the amount of the antibacterial / antiviral agent used can be suppressed to about half of the case where the halftone dot area ratio is 100%. On the other hand, when the halftone dot area ratio is smaller than 100%, a gap is provided between adjacent halftone dots, and this gap becomes larger as the halftone dot area ratio becomes lower. However, a halo of the antibacterial / antiviral agent contained in the coating liquid constituting the halftone dots is formed around the halftone dots, and the gap between the adjacent halftone dots is the width of the halo. It is small enough by comparison. Since the action of the antibacterial / antiviral agent extends to this halo, the antibacterial / antiviral action in the coated area is not impaired by expressing the coated area with a halftone dot pattern. That is, according to the above configuration, the amount of the antibacterial / antiviral agent used can be easily adjusted without impairing the antibacterial / antiviral action.

It is also preferable that the coating liquid contains ink in the paper container.

According to this configuration, the area to which the antibacterial / antiviral agent is applied is visualized, so that it can be clarified from the appearance that the paper container is imparted with the antibacterial / antiviral action.

Further, in the paper container, it is also preferable that the coating pattern is a striped pattern in which strip-shaped coating regions and strip-shaped non-coating regions are alternately arranged.

According to this configuration, the amount of antibacterial / antiviral agent used can be effectively suppressed.

The present invention also covers a method for manufacturing a paper container. That is, the present invention is a method for manufacturing a paper container formed by using a paper material, and the portion of the paper material forming the outer surface side of the paper container is coated with an antibacterial / antiviral agent. A coating step of applying the liquid in a predetermined coating pattern is provided, and the coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied. The pattern is such that when a reference circle defined as the thickness of a human finger is placed at an arbitrary position in the coating pattern, the coating region is included in at least a part of the reference circle. It is characterized by.

Alternatively, the present invention is a method for manufacturing a paper container formed by using a paper material, wherein the portion of the paper material forming the outer surface side of the paper container is coated with an antibacterial / antivirus agent. A coating step of applying the liquid in a predetermined coating pattern is provided, and the coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied. The coating region is characterized in that it is arranged in the region where the halo of the antibacterial / antiviral agent contained in the coating liquid applied to the coating region is formed.

Further, in the method for manufacturing a paper container, it is also preferable that the coating step is performed by a printing method selected from offset printing, gravure printing, screen printing, flexographic printing, typographic printing, and inkjet printing.

According to the present invention, it is possible to impart a necessary and sufficient antibacterial / antiviral effect to a paper container while suppressing the amount of the antibacterial / antiviral agent used.

The figure for demonstrating the manufacturing method of a cardboard box. The figure which shows the structure of the coating part schematically. The figure which shows the cardboard box schematically. The figure which shows the structural example of a coating pattern. The figure which shows the structural example of the coating pattern which concerns on another embodiment. The figure which shows typically the structure of the coating part which concerns on another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
A method for manufacturing a corrugated cardboard box according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram for explaining a method for manufacturing a cardboard box 10. Specifically, FIG. 1A is a block diagram showing a configuration of a box making machine 8 used for manufacturing a cardboard box 10, and FIG. 1B is a block diagram showing each step performed by the box making machine 8. It is a schematic diagram for demonstrating.

The cardboard box 10 is manufactured by using the box making machine 8. The box making machine 8 is a device for processing a corrugated cardboard sheet 1 into a corrugated cardboard box 10. The corrugated cardboard sheet 1 is formed by cutting a long corrugated cardboard base paper manufactured by using a device called a corrugated board or the like to a predetermined size to form a rectangular shape.

The box making machine 8 has a configuration in which a supply unit 81, a coating unit 82, a processing unit 83, an adhesive unit 84, and the like are arranged along a delivery path T to which the corrugated cardboard sheet 1 is sent.

In the box making machine 8 having such a configuration, the supply unit 81 sends out the corrugated cardboard sheets 1 one by one to the delivery path T (delivery step S1). The corrugated cardboard sheet 1 to which the delivery path T is sent is first coated with the coating liquid at the coating unit 82 (coating step S2). Subsequently, in the processing unit 83, various processing such as grooving, ruled line formation, punching using a punching die, and the like is performed on the corrugated cardboard sheet 1 coated with the coating liquid (processing step S3). Subsequently, in the adhesive portion 84, the processed corrugated cardboard sheet 1 is bent and both ends in the long direction are adhered to each other (adhesion step S4). As a result, a flat cardboard box 10 is obtained. Needless to say, when used, the flat cardboard box 10 is assembled into a box shape (see FIG. 3).

The order in which each of these steps S2 to S4 is performed may be any, and for example, the coating step S2 may be performed after the processing step S3. Further, further steps may be performed before, after, or in the middle of each step S2 to S4.

Next, the coating unit 82 and the coating process S2 performed here will be specifically described with reference to FIG. FIG. 2 is a diagram schematically showing the configuration of the coating portion 82.

The coating unit 82 is realized by a so-called offset printing machine. That is, the coating unit 82 includes a plate cylinder 821, and a water roller 822 and a coating liquid roller 823 provided in contact with the plate cylinder 821. Further, the coating portion 82 further includes a bracket 824 provided in contact with the plate cylinder 821 and an impression cylinder 825 provided facing the bracket 824. Water (soaked water) stored in the water storage unit (not shown) is supplied to the water roller 822. Further, the coating liquid 2 stored in the coating liquid storage unit 826 is supplied to the coating liquid roller 823. The coating liquid 2 contains C color, M color, Y color, or K color ink 21, and the coating unit 82 includes a coating unit 820 including each of these elements 821 to 826 for each ink color. It is provided in.

The coating liquid 2 held in the coating liquid storage unit 826 of each coating unit 820 contains an antibacterial / antiviral agent 22 in addition to the C color, M color, Y color, or K color ink 21. There is. The antibacterial / antiviral agent 22 is a substance having at least one of an antibacterial action (an action of suppressing and inhibiting the growth of bacteria) and an antiviral action (an action of inactivating a virus). Any substance may be used as the antibacterial / antiviral agent, but from the viewpoint of safety, it is preferable to use a substance composed of plant components, that is, a substance obtained by extracting and purifying the components of the plant. Especially preferable. Specifically, for example, black pine leaf, red pine leaf, Ezo pine leaf, persimmon leaf / fruit, tea leaf, bear bamboo leaf stem, lemon fruit, birch bark, grape fruit, perilla leaf stem, aloe. , Amachazuru leaf stem, Sansho leaf stem, etc. It is preferable to use an antibacterial / antiviral agent composed of components extracted from plants. Further, since the cardboard box 10 often has a long storage period before it is actually used, the antibacterial / antiviral agent 22 used here has a sufficiently long duration of antibacterial action and antiviral action. It is also preferable that

In the coating unit 82 having such a configuration, the coating liquid 2 is applied to the corrugated cardboard sheet 1 by a so-called offset printing method. That is, when the plate cylinder 821 is rotated, soaking water is supplied from the water roller 822 to the printing plate wound around the plate cylinder 821, and then the coating liquid 2 is supplied from the coating liquid roller 823. As the rotation of the plate cylinder 821 progresses, the coating liquid 2 adhering to the printing plate is transferred to the bracket 824. Then, when the corrugated cardboard sheet 1 is supplied between the bracket 824 and the impression cylinder 825, the coating liquid 2 transferred to the bracket 824 is printed on the corrugated cardboard sheet 1. A coating pattern 3 is formed on the printing plate based on the coating pattern data prepared in advance, and the coating liquid 2 is applied to the corrugated cardboard sheet 1 according to the coating pattern 3.

Next, the region where the coating pattern 3 is formed in the corrugated cardboard sheet 1 will be described with reference to FIGS. 1 and 3. FIG. 3 is a diagram schematically showing a cardboard box 10 manufactured by the above manufacturing method.

As shown in FIG. 1, in the coating step S2, one main surface of the corrugated cardboard sheet 1, that is, the main surface of the corrugated cardboard box 10 on the outer surface side when the flat corrugated cardboard box 10 is assembled into a box shape. The coating pattern 3 is formed only on the surface. Further, the coating pattern 3 is not formed on the entire main surface, but is formed on a portion of the main surface excluding the portion 12 that constitutes the inner flap 102.

Therefore, as shown in FIG. 3, when the cardboard box 10 is assembled in a box shape, the coating pattern 3 does not appear on the inner side surface of the cardboard box 10, but appears only on the outer surface side. Further, the coating pattern 3 does not appear on the inner flap 102 on the outer surface side. That is, in the coating pattern 3, the packed cardboard box 10 (that is, the cardboard box 10 is assembled in a box shape, articles and the like are put therein, the inner flap 102 and the outer flap 101 are folded in order, and further. In a state where the outer flaps 101 are bound to each other using a gum tape or the like), it appears only in the portion exposed to the outside.

Next, the configuration of the coating pattern 3 will be described with reference to FIG. 4 (a) and 4 (b) are enlarged views showing a part A of the outer surface of the cardboard box 10 shown in FIG. 3, and different configuration examples of the coating patterns 3a and 3b are shown for each. There is.

The coating pattern 3 includes a coating region 31 to which the coating liquid 2 is applied and a non-coating region 32 to which the coating liquid 2 is not applied. The coating pattern 3 (3a) exemplified in FIG. 4A constitutes a striped pattern (striped pattern) in which the strip-shaped coating region 31 and the strip-shaped non-coating region 32 are alternately arranged. On the other hand, the coating pattern 3 (3b) exemplified in FIG. 4B constitutes a polka dot pattern in which innumerable circular coating regions 31 are arranged at intervals, and is between adjacent coating regions 31. The gaps of the two form the non-applied region 32.

In both the striped coating pattern 3 (3a) and the polka dot coating pattern 3 (3b), the coating liquid 2 is coated in the coating region 31 based on the halftone dot pattern. That is, the coating region 31 is represented by a halftone dot pattern, and when a part of the coating region 31 is enlarged, it can be seen that the coating region 31 is composed of innumerable halftone dots (dots) 311. As is well known, the higher the halftone dot area ratio of the halftone dot pattern, the darker the color of the ink 21 is expressed, and when the halftone dot area ratio of the halftone dot pattern is 100%, the ink 21 is solidly painted and the color of the ink 21 is the most. It is expressed deeply.

The lower the halftone dot area ratio of the halftone dot pattern constituting the coating region 31, the smaller the amount of the coating liquid 2 (and thus the amount of the antibacterial / antiviral agent 22) required for coating the coating region 31. Can be done. However, when the halftone dot area ratio is smaller than 100%, a gap is provided between the adjacent halftone dots 311 and the gap becomes larger as the halftone dot area ratio becomes lower. However, where the halo of the antibacterial / antiviral agent 22 contained in the coating liquid 2 constituting the halftone dots 311 is formed around the halftone dots 311, the gap between the adjacent halftone dots 311 is formed. It is small enough compared to the width of this halo. Since the action of the antibacterial / antiviral agent 22 extends to this halo, the antibacterial / antiviral action in the coated area 31 is not impaired by expressing the coated area 31 with a halftone dot pattern.

In both the striped coating pattern 3 (3a) and the polka dot coating pattern 3 (3b), a reference circle F defined as the thickness of a human finger is arranged at an arbitrary position in the coating pattern 3. Occasionally, the coating area 31 is included in at least a part of the reference circle F. The reference circle F can be, for example, a circle having a diameter of about 8 mm to 9 mm.

Specifically, in the case of the striped coating pattern 3 (3a), the width d32 of the non-coated region 32 is smaller than the diameter dF of the reference circle F.

Further, in the case of the polka dot coating pattern 3 (3b), no matter where the reference circle F is placed in the coating pattern 3, one or more coating regions 31 are included in the reference circle F. The size (diameter) of each coating region 31 and the separation distance between adjacent coating regions 31 are specified.

In the corrugated cardboard box 10 according to the above embodiment, the coating liquid 2 containing the antibacterial / antiviral agent 22 is coated on the outer surface side thereof in a predetermined coating pattern 3. The coating pattern 3 includes a coating region 31 to which the coating liquid 2 is applied and a non-coating region 32 to which the coating liquid 2 is not applied. Then, when the coating pattern 3 arranges the reference circle F defined as the thickness of a human finger at an arbitrary position in the coating pattern 3, the coating region 31 is formed on at least a part of the reference circle F. It is included.

According to this configuration, since the coating liquid 2 containing the antibacterial / antiviral agent 22 is applied in the coating pattern 3 including the non-applied region 32, the amount of the antibacterial / antiviral agent 22 used can be suppressed. .. Further, when the coating pattern 3 arranges the reference circle F defined as the thickness of a human finger at an arbitrary position in the coating pattern 3, the coating region 31 covers at least a part of the reference circle F. When a human finger touches an arbitrary position in the coating pattern 3, at least a part of the finger touches the coating region 31. Therefore, even if bacteria or viruses adhere to the finger, the growth of the bacteria is inhibited by the action of the antibacterial / antiviral agent 22 contained in the coating liquid 2 coated on the coating region 31. The virus is inactivated. Further, around the coating region 31, a halo (growth inhibitory zone) of the antibacterial / antiviral agent 22 contained in the coating liquid 2 coated here is formed. Since the action of the antibacterial / antiviral agent 22 extends to this halo, there is a high possibility that even if some bacteria or virus adhere to the non-coated area 32, the growth of the bacteria will be inhibited and the virus will be inactivated. .. That is, by applying the coating liquid 2 in such a coating pattern 3, sufficient antibacterial and antiviral effects can be expected. As described above, according to this embodiment, it is possible to impart the necessary and sufficient antibacterial / antiviral action to the cardboard box 10 while suppressing the amount of the antibacterial / antiviral agent 22 used.

Further, in the cardboard box 10 according to the above embodiment, the coating liquid 2 is applied in the coating region 31 based on the halftone dot pattern. According to this configuration, the amount of the coating liquid 2 used (and by extension, the amount of the antibacterial / antiviral agent 22 used) can be adjusted by adjusting the halftone dot area ratio in the halftone dot pattern. For example, if the halftone dot area ratio is 50%, the amount of the antibacterial / antiviral agent used can be suppressed to about half of the case where the halftone dot area ratio is 100%. Further, as described above, since the coating region 31 is represented by a halftone dot pattern, the antibacterial / antiviral action in the coating region 31 is not impaired. That is, according to this embodiment, the amount of the antibacterial / antiviral agent 22 used can be easily adjusted without impairing the antibacterial / antiviral action.

Further, in the cardboard box 10 according to the above embodiment, the coating liquid 2 contains the ink 21. According to this configuration, the area to which the antibacterial / antiviral agent 22 is applied is visualized, so that it can be clarified from the appearance that the cardboard box 10 is imparted with the antibacterial / antiviral action.

Further, in the cardboard box 10 according to the above embodiment, if the striped coating pattern 3a in which the strip-shaped coating region 31 and the strip-shaped non-coating region 32 are alternately arranged is adopted as the coating pattern 3, antibacterial. The amount of the antiviral agent 22 used can be effectively suppressed.

Further, in the method for manufacturing the corrugated cardboard box 10 according to the above embodiment, the coating liquid 2 is applied to the corrugated cardboard sheet 1 by an offset printing method. Therefore, the antibacterial / antiviral agent 22 can be applied to the corrugated cardboard sheet 1 while using the existing printing equipment.

<Second Embodiment>
The cardboard box 10 and the method for manufacturing the cardboard box 10 according to this embodiment are different from the above-described embodiment in the configuration of the coating pattern. Since the configuration is the same as that of the above embodiment except for the configuration of the coating pattern, the description thereof will be omitted.

The configuration of the coating pattern 4 according to this embodiment will be described with reference to FIG. 5 (a) and 5 (b) are enlarged views showing a part A of the outer surface of the cardboard box 10 shown in FIG. 3, and different configuration examples of the coating patterns 4a and 4b are shown for each. There is.

Similar to the coating pattern 3 according to the above embodiment, the coating pattern 4 also includes a coating region 41 to which the coating liquid 2 is applied and a non-coating region 42 to which the coating liquid 2 is not applied. The coating pattern 4 (4a) exemplified in FIG. 5A constitutes a striped pattern in which strip-shaped coating regions 41 and strip-shaped non-coating regions 42 are alternately arranged. On the other hand, the coating pattern 4 (4b) exemplified in FIG. 5B constitutes a polka dot pattern in which innumerable circular coating regions 41 are arranged at intervals, and is between adjacent coating regions 41. The gaps of the two form the non-applied region 42.

In both the striped coating pattern 4 (4a) and the polka dot coating pattern 4 (4b), the coating liquid 2 is coated in the coating region 41 based on the halftone dot pattern (see FIG. 4).

In both the striped coating pattern 4 (4a) and the polka dot coating pattern 4 (4b), the non-coated region 42 is an antibacterial / antiviral substance contained in the coating liquid 2 coated on the coating region 41. The agent halo is located within the area where it is formed.

That is, in the case of the striped coating pattern 4 (4a), the width d42 of the non-coated region 42 is an antibacterial / antiviral agent contained in the coating liquid 2 coated on the coating region 41 adjacent to one side thereof. The width dH of the region where the halo is formed (that is, the region extending in the width direction of the strip-shaped coating region 41) and the halo of the antibacterial / antiviral agent coated on the coating region 41 adjacent to the other side are formed. It is made smaller than the width obtained by adding the width dH of the region to be formed.

Further, in the case of the polka dot coating pattern 4 (4b), the antibacterial / antiviral agent 22 contained in the coating liquid 2 coated on at least one coating region 41 at each position in the non-coating region 42. The size (diameter) of each coating area 41 and between adjacent coating areas 41 so as to be located within the area where the halo is formed (ie, the area of width dH extending around each coating area 41). The separation distance is specified.

The region where the halo of the antibacterial / antiviral agent 22 contained in the coating liquid 2 coated on the coating region 41 is formed becomes wider as the concentration of the antibacterial / antiviral agent 22 in the coating liquid 2 increases. Become. Therefore, in defining the coating pattern 4, it is also preferable to add the concentration of the antibacterial / antiviral agent 22 in the coating liquid 2.

In the corrugated cardboard box 10 according to the above embodiment, the coating liquid 2 containing the antibacterial / antiviral agent 22 is coated on the outer surface side thereof in a predetermined coating pattern 4. The coating pattern 4 includes a coating region 41 to which the coating liquid 2 is applied and a non-coating region 42 to which the coating liquid 2 is not applied. The non-applied region 42 is arranged in the region where the halo of the antibacterial / antiviral agent 22 contained in the coating liquid coated on the coating region 41 is formed.

According to this configuration, since the coating liquid 2 containing the antibacterial / antiviral agent 22 is applied in the coating pattern 4 including the non-applied region 42, the amount of the antibacterial / antiviral agent 22 used can be suppressed. .. Further, since the non-coated region 42 is arranged in the region where the halo of the antibacterial / antiviral agent 22 coated on the coated region 41 is formed, even if bacteria or viruses adhere to the non-coated region 42. , The growth of the fungus is inhibited and the virus is inactivated. That is, by applying the coating liquid 2 in such a coating pattern 4, sufficient antibacterial and antiviral effects can be expected. As described above, also by this embodiment, it is possible to impart the necessary and sufficient antibacterial / antiviral action to the cardboard box 10 while suppressing the amount of the antibacterial / antiviral agent 22 used.

<Other embodiments>
In each of the above embodiments, in the coating step S2, the coating patterns 3 and 4 are formed only on one main surface of the corrugated cardboard sheet 1 (that is, the main surface on the outer surface side of the corrugated cardboard box 10). , Application patterns 3 and 4 may be formed on both main surfaces of the corrugated cardboard sheet 1. That is, the coating patterns 3 and 4 may be formed on both the outer surface side and the inner surface side of the cardboard box 10.

In each of the above embodiments, in the coating step S2, the coating patterns 3 and 4 are formed only on a part of one main surface of the corrugated cardboard sheet 1 (that is, the main surface on the outer surface side of the corrugated cardboard box 10). However, the coating patterns 3 and 4 may be formed on the entire main surface of the corrugated cardboard sheet 1. That is, the coating patterns 3 and 4 may be formed also on the portion of the cardboard box 10 in the packed state that is not exposed to the outside (for example, the inner flap 102).

In each of the above embodiments, the coating patterns 3 and 4 are not limited to the striped pattern or the polka dot pattern. That is, the coating patterns 3 and 4 include the coating region 31 and the non-coating region 32, and when the reference circle F is arranged at an arbitrary position in the coating pattern 3, the coating region 31 is at least a part thereof. As long as it is included, or includes the coated region 41 and the non-coated region 42, and the non-coated region 42 is a region where the halo of the antibacterial / antiviral agent 22 coated on the coated region 41 is formed. It may be anything as long as it is arranged inside. Further, figures, characters, symbols and the like may be superimposed on the coating patterns 3 and 4. Alternatively, a part or the whole of the coating patterns 3 and 4 may be composed of figures, characters, symbols and the like.

In the second embodiment, all the positions in the non-applied region 42 are arranged in the region where the halo of the antibacterial / antiviral agent contained in the coating liquid 2 applied to the coating region 41 is formed. Most preferably, in some cases, a halo is formed, with the exception of some positions within the non-coated area 42 (eg, parts that correspond to positions that are unlikely to be touched by a human finger or the like). It may be arranged outside the area to be sterilized. That is, almost all the positions in the non-applied region 42 may be arranged in the region where the halo is formed.

In the above embodiment, the coating liquid 2 is applied in the coating areas 31 and 41 based on the halftone dot pattern. In this case, the lower the halftone dot area ratio, the smaller the amount of the antibacterial / antiviral agent 22 used, and conversely, the higher the halftone dot area ratio, the higher the antibacterial / antiviral effect. In view of these balances, it is also preferable that the halftone dot area ratio of the halftone dot pattern in the coating regions 31 and 41 is 20% or more and 80% or less.

In each of the above embodiments, it is assumed that the coating liquid 2 containing the ink 21 and the antibacterial / antiviral agent 22 is held in all of the four coating units 820 provided in the coating unit 82. The coating liquid held in the coating unit 820 may contain the ink 21 and may not contain the antibacterial / antiviral agent 22. However, in this case, the coating unit 820 provided at least on the most downstream side (that is, the coating unit 820 for coating the fourth color ink 21) holds the coating liquid 2 containing the ink 21 and the antibacterial / antiviral agent 22. It is preferable to do. By doing so, it becomes possible to apply the ink 21 of the fourth color and the antibacterial / antiviral agent 22 on the corrugated cardboard sheet 1 after the ink 21 of the first to third colors is applied. By applying the antibacterial / antiviral agent 22 to at least the uppermost layer, the antibacterial / antiviral action is sufficiently exhibited.

In each of the above embodiments, the coating unit 82 includes four coating units 820 that hold the coating liquid 2 containing the ink 21 and the antibacterial / antiviral agent 22, but these four coating units 820 are provided. In addition, a coating unit 820q may be further provided to hold the coating liquid (antibacterial / antiviral agent dedicated coating liquid) 2q containing the antibacterial / antiviral agent 22 and not the ink 21. As shown in FIG. 6, such a coating unit 820q is preferably provided on the downstream side of the four coating units 820p that hold the coating liquid 2p containing the inks 21 of each color. By doing so, it becomes possible to apply the antibacterial / antiviral agent 22 after the four colors of ink 21 are applied to the corrugated cardboard sheet 1, and the antibacterial / antiviral action is fully exhibited. .. Further, when such an additional coating unit 820q is provided, the coating liquid 2p held by the four coating units 820p does not have to contain the antibacterial / antiviral agent 22.

In each of the above embodiments, offset printing has been used to apply the coating liquid to the cardboard sheet 1 in the coating step S2, but various printing methods other than offset printing (for example, gravure printing, screen printing, flexographic printing) have been used. , Letter printing, inkjet printing, etc.) can be used to apply the coating liquid to the cardboard sheet 1.

In each of the above embodiments, the object to which the coating liquid 2 is applied is the corrugated cardboard sheet 1 forming the corrugated cardboard box 10, but the object to which the coating liquid 2 is applied is not limited to this. Paper materials (for example, corrugated cardboard forming paper containers) that form various paper containers can be used as objects.

Needless to say, the above embodiments and the configurations according to each of the above modifications can be combined with each other. Other configurations can be variously modified without departing from the spirit of the present invention.

1 Corrugated cardboard sheet 10 Cardboard box 101 Outer flap 102 Inner flap 2 Coating liquid 21 Ink 22 Antibacterial / antiviral agent 3,4 Coating pattern 31,41 Coating area 311 Halftone dot 32,42 Non-coating area 8 Box making machine

Claims (8)

A coating liquid containing an antibacterial / antiviral agent is applied to the outer surface side of the paper container in a predetermined coating pattern.
The coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied.
The coating pattern includes the coating region in at least a part of the reference circle when a reference circle defined as the thickness of a human finger is arranged at an arbitrary position in the coating pattern. ,
A paper container characterized by that. A coating liquid containing an antibacterial / antiviral agent is applied to the outer surface side of the paper container in a predetermined coating pattern.
The coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied.
The non-coated area is arranged in the area where the halo of the antibacterial / antiviral agent contained in the coating liquid applied to the coating area is formed.
A paper container characterized by that. The paper container according to claim 1 or 2.
In the coating area, the coating liquid is applied based on the halftone dot pattern.
A paper container characterized by that. The paper container according to any one of claims 1 to 3.
The coating liquid contains ink.
A paper container characterized by that. The paper container according to any one of claims 1 to 4.
The coating pattern is a striped pattern in which strip-shaped coated regions and strip-shaped non-coated regions are alternately arranged.
A paper container characterized by that. A method for manufacturing a paper container formed using paper materials.
A coating step of applying a coating liquid containing an antibacterial / antiviral agent to a portion of the paper material forming the outer surface side of the paper container in a predetermined coating pattern.
Equipped with
The coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied.
The coating pattern includes the coating region in at least a part of the reference circle when a reference circle defined as the thickness of a human finger is arranged at an arbitrary position in the coating pattern. ,
A method for manufacturing a paper container, which is characterized in that. A method for manufacturing a paper container formed using paper materials.
A coating step of applying a coating liquid containing an antibacterial / antiviral agent to a portion of the paper material forming the outer surface side of the paper container in a predetermined coating pattern.
Equipped with
The coating pattern includes a coating region to which the coating liquid is applied and a non-coating region to which the coating liquid is not applied.
The non-coated area is arranged in the area where the halo of the antibacterial / antiviral agent contained in the coating liquid applied to the coating area is formed.
A method for manufacturing a paper container, which is characterized in that. The method for manufacturing a paper container according to claim 7 or 8.
The coating process
Made by a printing method selected from offset printing, gravure printing, screen printing, flexographic printing, typographic printing, and inkjet printing.
A method for manufacturing a paper container, which is characterized in that.

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