Paper container, paper container with lid, and method for manufacturing paper container

Abstract

To provide a paper-made container which can urge a consumer to separate a paper container from a plastic container, and to provide a paper-made container with a lid material and a manufacturing method of the paper-made container.SOLUTION: A paper-made container 10 includes: a paper container 20; and a plastic member 40 laminated on an inner surface of the paper container 20. An inner surface of the paper container 20 is provided with a display print layer 2 covered with the plastic member 40. A portion which covers the display print layer 2 of the plastic member 40 includes a hiding area 45 configured to make the display print layer 2 invisible from above the plastic member 40.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a paper container, a paper container with a lid, and a method for manufacturing a paper container. [Background technology]

[0002] BACKGROUND ART Containers for storing food and drink to be taken home (so-called take-out products) and food and drink to be delivered to home have been known.

[0003] In recent years, in order to address the problem of marine pollution and reduce the environmental load, there has been a demand to reduce the amount of resin used in such containers, and efforts are being made to reduce the amount of resin and change the materials used in the containers. As such a container, a paper container comprising a paper container and a plastic member laminated on the inner wall of the paper container is known (for example, Patent Document 1). In such a paper container, after being filled with food, the paper container is covered with a lid. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2013-545675 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in order to reduce the environmental impact of such paper containers, recycling of the paper used in the containers is being promoted, and therefore there is a demand for containers that can encourage consumers to separate the paper container from the plastic components.

[0006] The present disclosure has been made in consideration of these points, and aims to provide a paper container, a paper container with a lid, and a method for manufacturing a paper container that can encourage consumers to separate paper containers from plastic components. [Means for solving the problem]

[0007] A paper container according to one embodiment comprises a paper container and a plastic member laminated on the inner surface of the paper container, wherein the inner surface of the paper container has a display printing layer covered by the plastic member, and the portion of the plastic member covering the display printing layer includes a concealed area configured so that the display printing layer cannot be seen from above the plastic member.

[0008] In one embodiment of the paper container, the concealing area may be colored a darker color than the display print layer.

[0009] In one embodiment of the paper container, the concealing area may be colored in a color that is complementary to the color of the display print layer.

[0010] In one embodiment of the paper container, the concealing area may have a total light transmittance of 80% or less.

[0011] In one embodiment of a paper container, the paper container has a bottom, a plurality of side portions connected to the bottom via a first fold line, and a plurality of flange pieces connected to each side portion via a second fold line, and the side portions may be adjacent to each other without being continuous with each other.

[0012] A paper container with a lid according to one embodiment is a paper container with a lid comprising the paper container according to the present disclosure and a lid that seals the paper container.

[0013] A method for manufacturing a paper container according to one embodiment includes a step of preparing a paper container having a display printing layer on its inner surface, and a step of laminating a plastic member on the inner surface of the paper container, wherein the portion of the plastic member that covers the display printing layer includes a concealed area configured so that the display printing layer cannot be seen from above the plastic member.

[0014] In one embodiment of a method for manufacturing a paper container, the process for preparing the paper container includes a process for preparing a blank material having a base body and the display printing layer provided on the surface of the base body, and a process for assembling the blank material to produce the paper container, wherein the paper container has a bottom, a plurality of side portions connected to the bottom via a first fold line, and a plurality of flange pieces connected to each side portion via a second fold line, and the side portions may be adjacent to each other without being continuous with each other. [Effects of the Invention]

[0015] According to the present disclosure, consumers can be encouraged to separate paper containers from plastic components. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a paper container with a lid according to this embodiment. [Figure 2] FIG. 2 is a perspective view showing a paper container according to this embodiment. [Figure 3] FIG. 3 is a plan view showing the paper container according to this embodiment. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing the paper container according to this embodiment (an enlarged cross-section corresponding to part IV in FIG. 1). [Figure 5] FIG. 5 is a plan view showing a blank according to this embodiment. [Figure 6] FIG. 6 is a cross-sectional view (cross-sectional view taken along line VI-VI in FIG. 5) showing a blank material according to this embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. [Figure 9] FIG. 9 is a cross-sectional view showing a method for manufacturing a paper container according to this embodiment. [Figure 10]FIG. 10 is a cross-sectional view illustrating the function of the paper container according to this embodiment. [Figure 11] FIG. 11 is a plan view illustrating the function of the paper container according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present embodiment will now be described with reference to the drawings. Figures 1 to 11 illustrate the present embodiment. The following figures are schematic illustrations. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Appropriate modifications are possible within the scope of the technical concept. In the following figures, identical parts are denoted by the same reference numerals, and some detailed descriptions may be omitted. The numerical values, such as dimensions, and material names of each component described in this specification are merely examples of the embodiment and are not limited to these. Appropriate selections may be made. In this specification, terms specifying shape or geometric conditions, such as parallel, perpendicular, and vertical, are used in their strict sense, but also encompass substantially the same state. In this specification, "top" and "bottom" refer to the upper and lower sides, respectively, of a paper container in an upright position (Figure 1). In this specification, "surface" refers to the surface facing the contents or the surface facing upward when the paper container is upright.

[0018] Paper container with lid As shown in Fig. 1, the paper container with lid 1 according to this embodiment comprises a paper container 10 and a lid 50 that seals the paper container 10. First, the paper container 10 will be described.

[0019] Paper containers 1 to 4, the paper container 10 includes a paper container 20 and a film (plastic member) 40 laminated on the surface (inner surface) of the paper container 20. The paper container 20 is produced by assembling blanks 30, which will be described later.

[0020] (Paper container) The paper container 20 has a bottom 21, a plurality of side portions 23 connected to the bottom 21 via a first fold line 22, and a plurality of flange pieces 25 connected to each of the side portions 23 via a second fold line 24.

[0021] The bottom 21 has a generally rectangular shape in plan view. The bottom 21 may have a polygonal shape such as an octagonal shape in plan view.

[0022] The first fold line 22 connecting the bottom 21 and the side 23 may be formed in a perforated shape or a half-cut line. This makes it easier to fold the side 23 relative to the bottom 21. When the first fold line 22 is formed in a perforated shape, the film 40 is pressed against the paper container 20 near the first fold line 22 by sucking air through suction holes 61 of the cavity-side mold 60 (described later). This improves the adhesion between the film 40 and the paper container 20. Note that "formed in a perforated shape" means that penetrating portions that penetrate the paper container 20 and non-penetrating portions that do not penetrate the paper container 20 are formed alternately in a line. Furthermore, "half-cut" means that the paper container 20 is cut partway in the thickness direction.

[0023] Each side portion 23 extends upward from the bottom portion 21. In the illustrated example, the paper container 20 has four side portions 23, and the side portions 23 are formed as a whole in the shape of an inverted quadrangular pyramid. However, this is not limited thereto, and the side portions 23 may be formed as a whole in the shape of a polygonal pyramid, such as an inverted octagonal pyramid.

[0024] The multiple side portions 23 are adjacent to each other without being continuous with each other. That is, the side portions 23 are adjacent to each other without overlapping. This improves the adhesion between the side portions 23 and the film 40 around the entire circumference of the paper container 20. Furthermore, because the side portions 23 are adjacent to each other without overlapping, it is possible to prevent pinholes and the like from occurring in the film 40 when the film 40 is adhered to the paper container 20. Note that small gaps are formed between the side portions 23 to allow air to pass through, and the film 40 is configured to be pressed against the paper container 20 by sucking air through suction holes 61 of the cavity-side mold 60, which will be described later.

[0025] The second fold line 24 connecting the side portion 23 and the flange piece 25 may be formed in a perforated shape, similar to the first fold line 22, or may be a half-cut line. This makes it easier to fold the flange piece 25 relative to the side portion 23. When the second fold line 24 is formed in a perforated shape, the film 40 is pressed against the paper container 20 in the vicinity of the second fold line 24 by sucking air through suction holes 61 of the cavity-side mold 60, which will be described later. This improves the adhesion between the film 40 and the paper container 20.

[0026] Each flange piece 25 protrudes horizontally laterally from the upper end of the side portion 23. In the illustrated example, the paper container 20 has four flange pieces 25, and the flange pieces 25 are formed in an annular shape as a whole.

[0027] The multiple flange pieces 25 are adjacent to each other without being contiguous. That is, the flange pieces 25 are adjacent to each other without overlapping. This improves the adhesion between the flange pieces 25 and the film 40 around the entire circumference of the paper container 20. Furthermore, because the flange pieces 25 are adjacent to each other without overlapping, it is possible to prevent pinholes and the like from occurring in the film 40 when adhering the film 40 to the paper container 20. Furthermore, because the flange pieces 25 are adjacent to each other without overlapping, it is possible to improve the adhesion between the film 40 and the lid material 50 when sealing the film 40 to the area of ​​the film 40 of the paper container 10 that corresponds to the flange pieces 25. This prevents poor sealing of the lid material 50. In this specification, "adjacent" refers not only to the case where adjacent members (e.g., flange pieces 25) are in contact with each other without any gaps throughout, but also to the case where either (1) or (2) below applies. (1) A member and another member are adjacent to each other with only a portion of the member in contact with the other member. (2) When one component and another component are adjacent to each other without being in contact with each other, at least a portion of the gap between the one component and the other component is large enough that film 40 (film 40a described below) cannot penetrate when film 40 is adhered to the one component and the other component.

[0028] As shown in Figs. 2 to 4, a display print layer 2 covered with a film 40 is provided on the surface (inner surface) of the paper container 20. This display print layer 2 is a layer on which an image is printed. In this case, examples of the image include a campaign code, a QR code, lottery winning information, etc. In the illustrated example, lottery winning information (the word "WIN") is printed on the display print layer 2 (see Fig. 3). The image may be, for example, various characters, a floral or animal pattern, a pattern such as stripes, dots, geometric shapes or figures, or text information including Braille.

[0029] This display printed layer 2 is provided on the surface of the bottom 21 of the paper container 20, among the surfaces of the paper container 20. In the illustrated example, the display printed layer 2 is provided on only a portion of the surface of the bottom 21 so as to cover the center of the bottom 21. However, this is not limited to this, and the display printed layer 2 may be provided on the entire surface of the bottom 21. Furthermore, the display printed layer 2 may be provided on the surface of the side portion 23 or the surface of the flange piece 25.

[0030] The display printing layer 2 can be an ink composition obtained by adding one or more of the following as the main component: one or more of ordinary ink vehicles; if necessary, one or more of plasticizers, stabilizers, antioxidants, light stabilizers, UV absorbers, curing agents, crosslinking agents, lubricants, antistatic agents, fillers, and other additives; and further adding colorants such as dyes and pigments; and thoroughly kneading the mixture with solvents, diluents, etc. to prepare an ink composition. Examples of such ink vehicles include linseed oil, tung oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd resin, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, and others, and one or more of these may be used in combination or copolymerized. The printing method for printing the display printing layer 2 may be gravure printing, as well as letterpress printing, screen printing, transfer printing, flexographic printing, offset printing, and other printing methods.

[0031] (Blank material) Next, a blank 30 for producing the paper container 20 will be described. As shown in Fig. 5, the blank 30 includes a substrate body 30a. The substrate body 30a has a bottom panel 31, a plurality of side panels 33 connected to the bottom panel 31 via a first fold line 32, and a plurality of flange piece panels 35 connected to each of the side panels 33 via a second fold line 34. The bottom panel 31, the first fold line 32, the side panels 33, the second fold line 34, and the flange piece panels 35 of the substrate body 30a correspond to the bottom 21, the first fold line 22, the side portions 23, the second fold line 24, and the flange pieces 25 of the paper container 20, respectively. In the illustrated example, the substrate body 30a includes four side panels 33 and four flange piece panels 35.

[0032] A gap 36 is formed between the side panels 33. In this case, each side panel 33 is formed in a trapezoidal shape. Each side panel 33 has a pair of side edges 33a extending from the bottom panel 31. A gap 36 is formed between the side edges 33a of the side panels 33. As a result, in the paper container 10 described above, the side portions 23 do not overlap each other but are adjacent to each other (see FIGS. 2 and 3). In the illustrated example, in each side panel 33, the pair of side edges 33a extend in directions that move away from each other from the first fold line 32 side toward the second fold line 34 side.

[0033] 6, the blank material 30 includes the above-mentioned substrate body 30a and a display print layer 2 provided on the surface of the substrate body 30a. The display print layer 2 of the blank material 30 corresponds to the display print layer 2 of the paper container 20.

[0034] The bottom panel 31, the side panels 33, and the flange piece panel 35 of the base material body 30a are integrally formed. The base material body 30a can be produced by subjecting the paper material that constitutes the blank 30 to a punching process or the like.

[0035] The paper material constituting the substrate body 30a is, for example, a paper sheet having a basis weight of 150 g / m 2 More than 800g / m 2 Various types of paperboard, coated paper, card paper, ivory paper, milk carton base paper, cup base paper, coated cardboard, and other processed paper can be used.

[0036] (film) Next, the film 40 will be described with reference to Figures 1 to 4. As described above, the film 40 is laminated on the surface of the paper container 20 and is provided so as to be releasable from the paper container 20. This film 40 serves to protect the paper container 20. The film 40 also has a container shape and covers the entire surface of the paper container 20. This prevents the contents filled in the paper container 10 from leaking out of the paper container 10. The film 40 is adhered to the paper container 20 by, for example, heat sealing (thermal welding).

[0037] Here, the portion of the film (plastic member) 40 that covers the display print layer 2 includes a concealing area 45 that is configured so that the display print layer 2 cannot be seen from above the plastic member 40. In Fig. 4, the concealing area 45 is shown shaded.

[0038] The concealing area 45 is an area for concealing the information displayed by the display printed layer 2. In other words, when the film 40 is laminated on the surface of the paper container 20, the display printed layer 2 is concealed by the concealing area 45, and consumers cannot see the display printed layer 2. On the other hand, when the film 40 is removed from the paper container 20, the display printed layer 2 that was covered by the concealing area 45 is exposed, and consumers can see the display printed layer 2. This concealing area 45 may be formed to cover the entire surface of the display printed layer 2, or may conceal all of the information displayed by the display printed layer 2. Alternatively, the concealing area 45 may be formed to cover only a portion of the display printed layer 2, or may conceal only a portion of the information displayed by the display printed layer 2.

[0039] The concealing area 45 is preferably colored in a darker color than the display print layer 2. This allows the concealing area 45 to effectively conceal the information displayed by the display print layer 2.

[0040] The concealing area 45 may also be colored in a color that is complementary to the display printed layer 2. That is, for example, a portion of the concealing area 45 that conceals a portion of the display printed layer 2 that is printed in red may be colored green. For example, a portion of the concealing area 45 that conceals a portion of the display printed layer 2 that is printed in green may be colored red. As a result, when the display printed layer 2 is viewed through the concealing area 45, the concealing area 45 and the display printed layer 2 appear black, and the concealing area 45 can effectively conceal the information displayed by the display printed layer 2.

[0041] Furthermore, the total light transmittance of the concealing area 45 may be 80% or less. Here, the total light transmittance is the ratio of the total amount of transmitted light that passes through the concealing area 45 to the total amount of light that enters the concealing area 45. When the total light transmittance is 80% or less, light that enters the concealing area 45 can be effectively blocked, and the light-blocking properties of the concealing area 45 can be improved. Therefore, the concealing area 45 can effectively conceal the information displayed by the display print layer 2. In this case, the total light transmittance can be measured by a method in accordance with JIS K7361, for example, using a haze meter (HM-150, manufactured by Murakami Color Research Laboratory).

[0042] The concealing region 45 may be colored with a colorant. In this case, the colorant is not particularly limited, and conventionally known pigments or dyes can be used. The film 40 described above may be multilayered. In this case, each layer in the concealing region 45 may be colored the same color or different colors. For example, one layer of the film 40 may be colored white, and the other layer disposed closer to the display printing layer 2 than the first layer may be colored gray. Alternatively, only some of the layers may be colored. Each layer may be colored with the colorant described above, or may be printed on the surface of a base layer (not shown) using, for example, the same material and method as the display printing layer 2 described above. Furthermore, although not shown, the concealing region 45 may be formed by printing a desired layer on the film 40 using, for example, the same material and method as the display printing layer 2 described above.

[0043] Such film 40 may be any film made of a thermoplastic resin that is water-resistant, sealable, and heat-sealable. Examples of film 40 include polyethylene (PE), polypropylene (PP), polyvinyl chloride, polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer, ionomer, ethylene-acrylic acid copolymer, polyamide, polyvinylidene chloride, polystyrene, saponified ethylene-vinyl acetate copolymer, polycarbonate, polybutene, polyvinyl alcohol, and other thermoplastic resin films, either alone or laminated together. In particular, when gas barrier properties are desired to be imparted to paper container 10, a laminate having a gas barrier material such as ethylene-vinyl alcohol copolymer (EVOH) laminated as an intermediate layer can be used, specifically a laminate having a layer structure such as PE / EVOH / PE, PP / EVOH / PE, or A (amorphous) PET / EVOH / PE.

[0044] The film 40 may be made from a laminate having the following layer configuration, for example: (Outside) Polyethylene (40 μm) / Ionomer (40 μm) / Polyethylene (40 μm) (Inside) (Outside) Polypropylene (30 μm) / Adhesive layer (10 μm) / Ionomer (40 μm) / Adhesive layer (10 μm) / Polypropylene (30 μm) (Inside) (Outside) Polyethylene (20 μm) / Ionomer (30 μm) / Adhesive layer (10 μm) / Ethylene-vinyl alcohol copolymer (10 μm) / Adhesive layer (10 μm) / Ionomer (15 μm) / Ethylene-vinyl acetate copolymer (20 μm) (Inside)

[0045] Each of the above layers is formed by a conventional method such as dry lamination, extrusion lamination, extrusion coating or other coating method.

[0046] Lid material Next, a description will be given of the lid member 50. The lid member 50 is sealed over the entire periphery of the film 40 of the paper container 10 in an area corresponding to the flange piece 25.

[0047] The lid material 50 can be, for example, a laminate having a layer structure such as PET / sealant, PP / sealant, PET / PP / sealant, PET / PE / sealant, or K-coated oriented nylon (KON) / PE / sealant. The laminate constituting the lid material 50 may also be, for example, a laminate having a gas barrier material such as ethylene-vinyl alcohol copolymer (EVOH) laminated as an intermediate layer. The lid material 50 can be, for example, a laminate having a layer structure such as PET / PE / ethylene-vinyl alcohol copolymer (EVOH) / PE / sealant. Aluminum foil or a vapor-deposited film (aluminum vapor deposition or transparent vapor deposition) may also be used as the barrier layer. Furthermore, it is preferable to use a resin material capable of exhibiting so-called easy-peel properties for the sealant.

[0048] The lid member 50 may be made from a laminate having the following layer configuration, for example. (Outside) Polyethylene terephthalate film with transparent vapor deposition layer (12 μm) / Nylon film (15 μm) / Polyethylene film (40 μm) (Inside)

[0049] Each of the above layers is formed by a conventional method such as dry lamination, extrusion lamination, extrusion coating or other coating method.

[0050] In the paper container with lid 1 configured as described above, first, the contents are filled into the paper container 10. Next, the lid 50 is sealed to the area of ​​the film 40 of the paper container 10 that corresponds to the flange piece 25. This results in a paper container with lid 1 filled with the contents. The paper container with lid 1 may be a container for chilled foods or frozen foods, or may be used as a take-out container. The contents may also be solid foods such as curry roux or butter, or foods such as prepared dishes, meat, or dairy products.

[0051] Next, the operation of this embodiment configured as described above will be described. Here, a method for manufacturing the paper container 10, a method for manufacturing the paper container with a lid 1, and a method for using the paper container with a lid 1 will be described with reference to Figures 7 to 11.

[0052] Paper container manufacturing method First, the paper container 20 is prepared. In this process, a blank material 30 (see FIG. 6) is prepared, which includes a substrate body 30a and a display print layer 2 provided on the surface of the substrate body 30a. In this process, a paper material that will become the substrate body 30a is first prepared, and the display print layer 2 is formed on the surface of the substrate body 30a. The display print layer 2 may be printed on the surface of the substrate body 30a by, for example, gravure printing, letterpress printing, screen printing, transfer printing, flexographic printing, offset printing, or other printing methods.

[0053] Thereafter, the paper material is subjected to a punching process or the like to obtain a blank material 30.

[0054] Next, the blanks 30 are assembled to produce the paper container 20. At this time, the blanks 30 are attached to a cavity-side mold 60, as shown in FIG. 7. Suction holes 61 are formed in the cavity-side mold 60, and the blank 30 is attached to the cavity-side mold 60 by sucking air through the suction holes 61. At this time, the side panels 33 of the blank 30 are folded relative to the bottom panel 31 along the first fold line 32. Similarly, the flange piece panels 35 of the blank 30 are folded relative to the side panels 33 along the second fold line 34. This results in a paper container 20 attached to the cavity-side mold 60. The paper container 20 has a display print layer 2 provided on the surface (inner surface) thereof.

[0055] Next, the film 40 is laminated on the surface of the paper container 20. At this time, first, as shown in FIG. 8, the film 40a that constitutes the film 40 is placed above the paper container 20. Next, the film 40a is heated by the core side mold 62 (see FIG. 9). Then, after the film 40a has been sufficiently heated by the core side mold 62, air is sucked through the suction holes 61. As a result, the film 40a is sucked onto the paper container 20, as shown in FIG. 9. At this time, the core side mold 62 also presses the film 40a against the paper container 20. As a result, the film 40a is in close contact with the paper container 20.

[0056] The film 40a is then cut into the desired shape by a cutting mechanism 63 provided in the core side mold 62. As a result, the film 40 laminated on the paper container 20 is obtained, as shown in FIG. 9. In this way, the paper container 10 is obtained. Here, the portion of the film 40 that covers the display printing layer 2 includes a concealing region 45 configured so that the display printing layer 2 cannot be seen from above the film 40. As a result, in the obtained paper container 10, the display printing layer 2 is concealed by the concealing region 45, and the display printing layer 2 cannot be seen by consumers.

[0057] Next, a method for manufacturing the lidded paper container 1 will be described.

[0058] First, the lid material 50 is prepared in parallel with the production of the paper container 10. At this time, a predetermined laminate is produced by a dry lamination method or the like. Then, the laminate is punched into a predetermined shape with a blade or the like to produce the lid material 50.

[0059] Next, the paper container 10 is filled with the contents, and the paper container 10 is sealed with the lid 50. At this time, first, the contents are filled into the paper container 10. Next, the lid 50 is placed on the film 40 at a position corresponding to the flange piece 25.

[0060] Next, the lid member 50 is sealed to the film 40 by a sealing hot plate (not shown) or the like. At this time, the air inside the paper container 10 may be replaced with nitrogen gas or the like.

[0061] In this way, a paper container with lid 1 is obtained, which comprises the paper container 10 and the lid 50 that seals the paper container 10.

[0062] When recycling the paper container 20 after use of the paper container 1 with lid material, the film 40 is removed from the paper container 20 of the paper container 10, as shown in Figures 10 and 11. This exposes the indicator printing layer 2 that was covered by the concealed area 45, allowing consumers to see the indicator printing layer 2.

[0063] As described above, according to this embodiment, the display printed layer 2 covered by the film 40 is provided on the surface of the paper container 20. The portion of the film 40 that covers the display printed layer 2 includes a concealing area 45 configured so that the display printed layer 2 cannot be seen from above the film 40. As a result, the concealing area 45 conceals the information displayed by the display printed layer 2. Furthermore, by peeling the film 40 from the paper container 20, the display printed layer 2 that was concealed by the concealing area 45 is exposed, allowing consumers to see the display printed layer 2.

[0064] As described above, in this embodiment, by peeling the film 40 from the paper container 20, consumers can visually recognize the display printed layer 2. This can encourage consumers who wish to obtain information displayed by the display printed layer 2 to peel the film 40 from the paper container 20. This can encourage consumers to separate the paper container 20 from the film 40, making it easier to recycle the paper container 20. As a result, the environmental impact can be reduced.

[0065] Furthermore, according to this embodiment, the concealing area 45 is colored in a darker color than the display print layer 2. This allows the concealing area 45 to effectively conceal the information displayed by the display print layer 2.

[0066] Furthermore, according to this embodiment, the concealing area 45 is colored in a color that is complementary to the display printing layer 2. As a result, when the display printing layer 2 is viewed through the concealing area 45, the concealing area 45 and the display printing layer 2 appear black, and the concealing area 45 can effectively conceal the information displayed by the display printing layer 2.

[0067] Furthermore, according to this embodiment, the total light transmittance of the concealing area 45 is 80% or less. This makes it possible to effectively block light incident on the concealing area 45, thereby improving the light-blocking properties of the concealing area 45. This allows the concealing area 45 to effectively conceal the information displayed by the display print layer 2.

[0068] In the above-described embodiment, an example has been described in which the film 40a is laminated onto the surface of the paper container 20 using the cavity-side mold 60 and the core-side mold 62 when laminating the film 40 onto the surface of the paper container 20, but this is not limiting. For example, the film 40 may be laminated onto the surface of the blank 30 in advance. Also, the plastic member does not have to be a film. In this case, the paper container 10 may be formed, for example, by injecting an injection resin (plastic member) onto the surface (inner surface) of the paper container 20.

[0069] The present disclosure is not limited to the above-described embodiments and modifications, and the components can be modified and embodied in practice without departing from the spirit of the present disclosure. Furthermore, various inventions can be created by appropriately combining multiple components disclosed in the above-described embodiments and modifications. Some components may be omitted from all the components shown in the embodiments and modifications. [Explanation of symbols]

[0070] 1 Paper container with lid 2 Display printing layer 10 Paper containers 20 Paper containers 21 Bottom 22 First broken line 23 Side 24 Second broken line 25 flange piece 40 Film 45 Concealed Area 50 Lid material

Claims

1. Paper containers and a plastic member laminated on the inner surface of the paper container, The paper container is The bottom and a plurality of side portions connected to the bottom portion via first folding lines; a plurality of flange pieces connected to each side portion via second folding lines, The side portions are adjacent to each other and are not continuous with each other, A display print layer covered with the plastic member is provided on the inner surface of the paper container, the plastic member is a film made of a thermoplastic resin having heat fusion properties, and is bonded to the paper container and the display print layer by heat sealing; a concealing region configured to prevent the display print layer from being visible from above the plastic member; the display print layer is provided on only a portion of the surface of the bottom portion so as to cover a central portion of the bottom portion; A paper container, wherein the concealing area is formed only in a portion of the plastic member that covers the bottom.

2. The paper container according to claim 1 , wherein the concealing area is colored a darker color than the display print layer.

3. The paper container according to claim 1 or 2, wherein the concealing area is colored in a color complementary to the color of the display print layer.

4. The paper container according to claim 1 , wherein the concealing region has a total light transmittance of 80% or less.

5. The paper container according to any one of claims 1 to 4, A paper container with a lid, comprising a lid that seals the paper container.

6. A step of preparing a paper container having a display print layer on the inner surface; and laminating a plastic member on the inner surface of the paper container. The paper container is The bottom and a plurality of side portions connected to the bottom portion via first folding lines; a plurality of flange pieces connected to each side portion via second folding lines, The side portions are adjacent to each other and are not continuous with each other, the plastic member is a film made of a thermoplastic resin having heat fusion properties, and is bonded to the paper container and the display print layer by heat sealing; a concealing region configured to prevent the display print layer from being visible from above the plastic member; the display print layer is provided on only a portion of the surface of the bottom portion so as to cover a central portion of the bottom portion; A method for manufacturing a paper container, wherein the concealing area is formed only in a portion of the plastic member that covers the bottom.

7. The method for manufacturing a paper container according to claim 6, wherein the process for preparing the paper container includes a process for preparing a blank material having a substrate body and the display printing layer provided on the surface of the substrate body, and a process for assembling the blank material to produce the paper container.

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