Blanks, paper containers and paper containers with lids

Abstract

To provide blank material, a paper container and a paper container with lid material which enable the recyclability thereof to be improved.SOLUTION: Blank material 30 comprises: a bottom panel 31; a plurality of side panels 33 which are connected via a first polygonal line 32 to the bottom panel 31; and a plurality of flange piece panels 35 which are connected via a second polygonal line 34 to the respective side panels 33. A gap 36 is formed between the side panels 33. A first tab piece 111 is formed on the one flange piece panel 35. A second tab piece 112 forming a tab 100 together with the first tab piece 111 is formed on the other flange piece panel 35 that is opposed via the gap 36 to the one flange piece panel 35.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a blank, a paper container, and a paper container with a lid. [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 for reducing 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 formed film 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] Incidentally, in order to reduce the environmental impact of such paper containers, recycling of the paper used in the containers is being promoted. For this reason, there is a demand for containers that allow consumers to easily peel off the formed film from the paper container after use and that allow the paper to be easily recycled.

[0006] The present disclosure has been made in consideration of these points, and aims to provide a blank material, a paper container, and a paper container with a lid that can improve recyclability. [Means for solving the problem]

[0007] A blank material according to one embodiment comprises a bottom panel, a plurality of side panels connected to the bottom panel via a first fold line, and a plurality of flange piece panels connected to each of the side panels via a second fold line, wherein a gap is formed between the side panels, a first tab piece is formed on one of the flange piece panels, and a second tab piece that forms a tab together with the first tab piece is formed on another flange piece panel opposite the first flange piece panel across the gap.

[0008] In one embodiment of the blank material, a first cutout portion may be formed at the tip of the first tab piece, and a second cutout portion may be formed at the tip of the second tab piece, forming a cutout portion together with the first cutout portion.

[0009] In the blank according to one embodiment, the width of the first tab piece in the one flange piece panel may be wider than the width of the other portion.

[0010] In the blank according to one embodiment, the width of the second tab piece in the other flange piece panel may be wider than the width of the other portion.

[0011] A paper container according to one embodiment is a paper container comprising a paper container produced by assembling the blank material according to the present disclosure and a formed film laminated on the surface of the paper container.

[0012] A paper container according to one embodiment comprises a paper container having 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 a formed film laminated on the surface of the paper container, wherein the side portions are adjacent to each other without being continuous with each other, a first tab piece is formed on one flange piece, and a second tab piece is formed on another flange piece adjacent to the first flange piece, and the first tab piece and the second tab piece form a tab for peeling the formed film from the paper container.

[0013] In one embodiment of the paper container, a first cutout portion may be formed at the tip of the first tab piece, a second cutout portion may be formed at the tip of the second tab piece, and the first cutout portion and the second cutout portion may form a cutout portion at the tip of the tab.

[0014] In one embodiment of the paper container, the rear surface of the formed film may be exposed at the cutout portion.

[0015] In one embodiment of the paper container, the width of the first tab piece in one flange piece may be wider than the width of the other portion.

[0016] In the paper container according to one embodiment, the width of the second tab piece in the other flange piece may be wider than the width of the other portion.

[0017] 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. [Effects of the Invention]

[0018] According to the present disclosure, the recyclability of paper containers and paper containers with lids can be improved. [Brief explanation of the drawings]

[0019] [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 plan view showing the paper container according to this embodiment (an enlarged plan view corresponding to part IV in FIG. 3). [Figure 5] FIG. 5 is a cross-sectional view (cross-section taken along line VV in FIG. 4) showing the paper container according to this embodiment. [Figure 6] FIG. 6 is a plan view showing a blank according to this embodiment. [Figure 7] FIG. 7 is an enlarged plan view showing a blank according to this embodiment (an enlarged plan view corresponding to part VII in FIG. 6). [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 showing a method for manufacturing a paper container according to this embodiment. [Figure 11] FIG. 11 is an enlarged plan view (corresponding to FIG. 4) showing a first modified example of the paper container according to the present embodiment. [Figure 12] FIG. 12 is an enlarged plan view (corresponding to FIG. 7) showing a first modified example of the blank according to the present embodiment. [Figure 13] FIG. 13 is an enlarged plan view (corresponding to FIG. 4) showing a second modified paper container according to the present embodiment. [Figure 14] FIG. 14 is an enlarged plan view (corresponding to FIG. 7) showing a second modified example of the blank according to the present embodiment. [Figure 15] FIG. 15 is an enlarged plan view (corresponding to FIG. 4) showing another example of the second modified paper container according to the present embodiment. [Figure 16]FIG. 16 is an enlarged plan view (corresponding to FIG. 7) showing another example of the second modified example of the blank according to the present embodiment. [Figure 17] FIG. 17 is an enlarged plan view (corresponding to FIG. 4) showing a paper container of a comparative example. [Figure 18] FIG. 18 is an enlarged plan view (corresponding to FIG. 7) showing a blank material of a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present embodiment will now be described with reference to the drawings. Figures 1 to 10 illustrate the present embodiment. The following figures are schematic diagrams. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Appropriate modifications can be made without departing from the technical concept. In the following figures, identical parts are designated 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 an embodiment and are not limited to these. Appropriate selections can be made. In this specification, terms specifying shape or geometric conditions, such as parallel, orthogonal, and vertical, are interpreted not only strictly but also to include 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.

[0021] 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.

[0022] Paper containers 1 to 3, the paper container 10 includes a paper container 20 and a formed film 40 laminated on the surface of the paper container 20. The paper container 20 is a container produced by assembling blanks 30, which will be described later.

[0023] (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.

[0024] 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.

[0025] The first fold line 22 connecting the bottom portion 21 and the side portion 23 may be formed in a perforated shape or a half-cut line. This makes it easier to fold the side portion 23 relative to the bottom portion 21. When the first fold line 22 is formed in a perforated shape, the formed film 40 is pressed against the paper container 20 in the vicinity of the first fold line 22 by sucking air through suction holes 61 of the cavity-side mold 60, which will be described later. This improves the adhesion between the formed film 40 and the paper container 20.

[0026] Each side portion 23 extends upward from the bottom portion 21. In the illustrated example, the paper container 20 has four side portions 23. Specifically, the paper container 20 has a pair of first side portions 23a extending along the short sides of the rectangle defined by the bottom portion 21 and a pair of second side portions 23b extending along the long sides of the rectangle defined by the bottom portion 21, 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.

[0027] 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 formed 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 formed film 40 when the formed film 40 is bonded to the paper container 20. Note that small gaps are formed between the side portions 23 to allow air to pass through, and the formed 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 described below.

[0028] 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 formed 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 formed film 40 and the paper container 20.

[0029] Each flange piece 25 protrudes horizontally from the upper end of the side portion 23. In the illustrated example, the paper container 20 has four flange pieces 25. Specifically, the paper container 20 has a pair of first flange pieces 25a extending along the short sides of the rectangle defined by the bottom portion 21 and a pair of second flange pieces 25b extending along the long sides of the rectangle defined by the bottom portion 21, and the flange pieces 25 are formed in an annular shape as a whole.

[0030] 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 molded 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 molded film 40 when adhering the molded 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 molded film 40 and the lid material 50 when sealing the lid material 50 to the area of ​​the molded 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 the following (1) or (2) applies. (1) One member and another member are adjacent to each other with only a portion of the one member (for example, the first flange piece 25a) in contact with the other member (for example, the second flange piece 25b). (2) When one component (e.g., first flange piece 25a) and another component (e.g., second flange piece 25b) 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 the molded film 40 (film 40a described below) cannot penetrate when adhering the molded film 40 to the one component and the other component.

[0031] 3 and 4, a first tab piece 101 is formed on one flange piece 25. A second tab piece 102 is formed on another flange piece 25 adjacent to the first flange piece 25. The first tab piece 101 and the second tab piece 102 form a tab 100 for peeling the molded film 40 from the paper container 20.

[0032] In the illustrated example, the first tab piece 101 is formed on the first flange piece 25a, and the second tab piece 102 is formed on the second flange piece 25b. The tab 100 is formed to straddle the first flange piece 25a and the second flange piece 25b. This allows a consumer to easily peel the molded film 40 from the flange pieces 25 by pinching the tab 100 with the fingers of one hand and pulling the molded film 40 with the fingers of the other hand. That is, a consumer can pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand and pull the molded film 40 with the fingers of the other hand. This allows the molded film 40 to be easily peeled from both the first flange piece 25a and the second flange piece 25b. The first tab piece 101 and the second tab piece 102 may have shapes that are symmetrical with respect to a predetermined axis of symmetry (in the illustrated example, the boundary line between the first flange piece 25a and the second flange piece 25b). Although not illustrated, the first tab piece 101 may be formed on the second flange piece 25b, and the second tab piece 102 may be formed on the first flange piece 25a.

[0033] As shown in FIG. 4, in the first flange piece 25a, the width W1 of the first tab piece 101 may be wider than the width W3 of the other portion. This makes it easier for consumers to grip the first tab piece 101 when pinching the tab 100. The width W1 of the first tab piece 101 may be 10 mm or more and 20 mm or less. When the width W1 of the first tab piece 101 is 10 mm or more, consumers can easily grip the first tab piece 101. Furthermore, when the width W1 of the first tab piece 101 is 20 mm or less, the first tab piece 101 is prevented from getting in the way when transporting the paper container 10, etc. On the other hand, the width W3 of the other portion may be 3 mm or more and 15 mm or less.

[0034] Furthermore, in the second flange piece 25b, the width W2 of the second tab piece 102 may be wider than the width W4 of the other portion. This makes it easier for consumers to grip the second tab piece 102 when gripping the tab 100. The width W2 of the second tab piece 102 may be 10 mm or greater and 20 mm or less. When the width W2 of the second tab piece 102 is 10 mm or greater, consumers can easily grip the second tab piece 102. When the width W2 of the second tab piece 102 is 20 mm or less, the second tab piece 102 is prevented from getting in the way when transporting the paper container 10, for example. On the other hand, the width W4 of the other portion may be 3 mm or greater and 15 mm or less.

[0035] A first notch 103 is formed at the tip of the first tab piece 101. A second notch 104 is formed at the tip of the second tab piece 102. The first notch 103 and the second notch 104 form a notch 105 at the tip of the tab 100. In the illustrated example, the first notch 103 cuts out the first tab piece 101 in an arc shape. Similarly, the second notch 104 cuts out the second tab piece 102 in an arc shape. Therefore, the notch 105 cuts out the tab 100 in an arc shape.

[0036] 5, the rear surface 40b of the molded film 40 is exposed at the cutout portion 105. This makes it easier for consumers to pick up the molded film 40 at the cutout portion 105.

[0037] The tab 100 may also be provided with a non-adhesive region R (the shaded area in FIGS. 4 and 5 ) where the molded film 40 is not adhered. This non-adhesive region R is preferably formed to straddle the first flange piece 25a and the second flange piece 25b. This allows consumers to easily pinch the molded film 40 with the fingers of one hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of the other hand. The non-adhesive region R may also extend to the outer edge 100a of the tab 100. Furthermore, the non-adhesive region R is preferably provided so as to surround the cutout portion 105. This makes it easier for consumers to pinch the tab 100. The non-adhesive region R may also be provided so as to surround the entire outer edge 100a of the tab 100.

[0038] (Blank material) Next, a blank 30 for producing the paper container 20 will be described. As shown in Fig. 6, the blank 30 includes a bottom panel 31, a plurality of side panels 33 connected to the bottom panel 31 via first fold lines 32, and a plurality of flange piece panels 35 connected to each of the side panels 33 via second fold lines 34. The bottom panel 31, first fold line 32, side panels 33, second fold line 34, and flange piece panels 35 of the blank 30 correspond to the bottom 21, first fold line 22, side portions 23, second fold line 24, and flange pieces 25 of the paper container 20, respectively. In the illustrated example, the blank 30 includes four side panels 33 and four flange piece panels 35.

[0039] Also, a gap 36 is formed between the side panels 33. Each side panel 33 has a pair of side edges 33c extending from the bottom panel 31. A gap 36 is formed between the side edges 33c of the side panels 33. As a result, in the paper container 10 described above, the side panels 23 do not overlap each other but are adjacent to each other (see Figures 2 and 3).

[0040] As described above, the side panels 33 of the blank 30 correspond to the sides 23 of the paper container 20. Therefore, the blank 30 has a pair of first side panels 33a extending along the short sides of the rectangle defined by the bottom panel 31, and a pair of second side panels 33b extending along the long sides of the rectangle defined by the bottom panel 31.

[0041] As described above, the flange piece panels 35 of the blank 30 correspond to the flange pieces 25 of the paper container 20. Therefore, the blank 30 has a pair of first flange piece panels 35a extending along the short sides of the rectangle defined by the bottom panel 31, and a pair of second flange piece panels 35b extending along the long sides of the rectangle defined by the bottom panel 31.

[0042] 6 and 7, a first tab piece 111 is formed on one flange piece panel 35. A second tab piece 112 is formed on another flange piece panel 35 that faces the first flange piece panel 35 across a gap 36. The second tab piece 112, together with the first tab piece 111, is a part that forms the tab 100 of the paper container 20 described above. In the illustrated example, the first tab piece 111 is formed on the first flange piece panel 35a, and the second tab piece 112 is formed on the second flange piece panel 35b.

[0043] The first tab piece 111 and the second tab piece 112 are parts that correspond to the first tab piece 101 and the second tab piece 102 of the paper container 20, respectively. Therefore, as shown in Fig. 7, the first tab piece 111 and the second tab piece 112 may have shapes that are symmetrical to each other with respect to a predetermined axis of symmetry.

[0044] Additionally, in the first flange piece panel 35a, the width w1 of the first tab piece 111 may be wider than the width w3 of the other portion. This makes it easier for consumers to grip the first tab piece 101 when gripping the tab 100. The width w1 of the first tab piece 111 may be 10 mm or more and 20 mm or less. Meanwhile, the width w3 of the other portion may be 3 mm or more and 15 mm or less.

[0045] Additionally, in the second flange piece panel 35b, the width w2 of the second tab piece 112 may be wider than the width w4 of the other portion. This makes it easier for consumers to grip the second tab piece 102 when gripping the tab 100. The width w2 of the second tab piece 112 may be 10 mm or more and 20 mm or less. Meanwhile, the width w4 of the other portion may be 3 mm or more and 15 mm or less.

[0046] Furthermore, a first cutout portion 113 is formed at the tip of the first tab piece 111, and a second cutout portion 114 is formed at the tip of the second tab piece 112. The first cutout portion 113 and the second cutout portion 114 are portions that correspond to the first cutout portion 103 and the second cutout portion 104 of the paper container 20, respectively. Therefore, the first cutout portion 113 is an arc-shaped cutout in the first tab piece 111, and the second cutout portion 114 is an arc-shaped cutout in the second tab piece 112.

[0047] The bottom panel 31, the side panels 33, and the flange piece panel 35 of the blank 30 are integrally formed. The blank 30 can be produced by punching or the like the paper material that constitutes the blank 30.

[0048] The blank 30 is made of a paper material 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.

[0049] (molded film) Next, the formed film 40 will be described with reference to Figures 1 to 5. This formed film 40 serves to protect the paper container 20. The formed film 40 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 formed film 40 is adhered to the paper container 20 by, for example, heat sealing (thermal welding).

[0050] Such a formed film 40 may be any film made of a thermoplastic resin that is water-resistant, airtight, and heat-sealable. Examples of the formed 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 for the 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 with a layer structure such as PE / EVOH / PE, PP / EVOH / PE, or A (amorphous) PET / EVOH / PE. The symbol " / " indicates the boundary between adjacent layers.

[0051] The formed 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)

[0052] Each of the above layers is formed by a conventional method such as dry lamination, extrusion lamination, extrusion coating or other coating method.

[0053] 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 region of the forming film 40 of the paper container 10 that corresponds to the flange piece 25.

[0054] The lid material 50 may be a laminate having a layer structure such as PET / sealant layer, PP / sealant layer, PET / PP / sealant layer, PET / PE / sealant layer, or K-coated oriented nylon (KON) / PE / sealant layer. The laminate constituting the lid material 50 may also be a laminate having a gas barrier material such as ethylene-vinyl alcohol copolymer (EVOH) laminated as an intermediate layer. The lid material 50 may be a laminate having a layer structure such as PET / PE / ethylene-vinyl alcohol copolymer (EVOH) / PE / sealant layer. Aluminum foil or a vapor-deposited film (aluminum vapor deposition or transparent vapor deposition) may also be used as the barrier layer. It is preferable to use a resin material capable of exhibiting so-called easy-peel properties for the sealant.

[0055] 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)

[0056] Each of the above layers is formed by a conventional method such as dry lamination, extrusion lamination, extrusion coating or other coating method.

[0057] 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 forming 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 food such as prepared dishes, meat, or dairy products.

[0058] Next, the operation of this embodiment configured as described above will be explained. Here, a method for manufacturing the paper container 10 and a method for manufacturing the paper container with lid 1 will be explained with reference to Figs. 8 to 10.

[0059] Paper container manufacturing method First, prepare the blank material 30. In this case, first, a paper material is prepared, and then the blank material 30 is obtained by performing a punching process or the like on the paper material.

[0060] Next, as shown in Figure 8, the blank 30 is attached to the cavity-side mold 60. Suction holes 61 are formed in this 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.

[0061] Next, the formed film 40 is laminated on the surface of the paper container 20. At this time, first, as shown in FIG. 9, the film 40a that constitutes the formed film 40 is placed above the paper container 20. Next, the film 40a is heated by the core side mold 62 (see FIG. 10). 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. 10. 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.

[0062] The film 40a is then cut into a desired shape by a cutting mechanism 63 provided in the core-side mold 62. This results in a formed film 40 laminated on a paper container 20, as shown in Figure 10. In this way, a paper container 10 is obtained.

[0063] Next, a method for manufacturing the lidded paper container 1 will be described.

[0064] 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.

[0065] Next, the paper container 10 is filled with the contents, and the paper container 10 is sealed with the lid member 50. At this time, first, the contents (not shown) are filled into the paper container 10. Next, the lid member 50 is placed on the forming film 40 at a position corresponding to the flange piece 25.

[0066] Next, the lid material 50 is sealed to the formed 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.

[0067] 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.

[0068] As described above, according to this embodiment, the first tab piece 101 is formed on the first flange piece 25a (one flange piece 25), and the second tab piece 102 is formed on the second flange piece 25b (another flange piece 25) adjacent to the first flange piece 25a. The first tab piece 101 and the second tab piece 102 form a tab 100 for peeling the molded film 40 from the paper container 20. This allows a consumer to pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the molded film 40 with the fingers of the other hand. This makes it possible to suppress deformation of the first flange piece 25a and the second flange piece 25b when peeling the molded film 40 from the paper container 20.

[0069] On the other hand, if the paper container does not have a tab 100 composed of the first tab piece 101 and the second tab piece 102, it may be difficult for the consumer to simultaneously grasp the first flange piece 25a and the second flange piece 25b with the fingers of one hand when peeling the molded film 40 from the paper container 20. In this case, when peeling the molded film 40 from the paper container 20, the first flange piece 25a or the second flange piece 25b may deform, making it difficult to peel the molded film 40 from the paper container 20A.

[0070] In contrast, in this embodiment, the first tab piece 101 and the second tab piece 102 form a tab 100 for peeling the molded film 40 from the paper container 20. This allows the consumer to pinch the first tab piece 101 and the second tab piece 102 simultaneously with the fingers of one hand when peeling the molded film 40 from the paper container 20. This prevents deformation of the first flange piece 25a and the second flange piece 25b when peeling the molded film 40 from the paper container 20. As a result, the molded film 40 can be easily peeled from both the first flange piece 25a and the second flange piece 25b. This allows the paper container 20 and the molded film 40 to be easily separated when recycling the paper container 20.

[0071] Furthermore, according to this embodiment, a first notch portion 103 is formed at the tip of the first tab piece 101. Furthermore, a second notch portion 104 is formed at the tip of the second tab piece 102. The first notch portion 103 and the second notch portion 104 form a notch portion 105 at the tip of the tab 100. This makes it even easier for consumers to grip the molded film 40 at the notch portion 105.

[0072] Furthermore, according to this embodiment, the back surface 40b of the molded film 40 is exposed at the cutout portion 105. This makes it even easier for consumers to pick up the molded film 40 at the cutout portion 105.

[0073] Furthermore, according to the present embodiment, the width W1 of the first tab piece 101 in the first flange piece 25a is greater than the width W3 of the other portion, which makes it easier for consumers to grip the first tab piece 101 when gripping the tab 100.

[0074] Furthermore, according to this embodiment, the width W2 of the second tab piece 102 at the second flange piece 25b is wider than the width W4 of the other portion, which also makes it easier for consumers to grip the second tab piece 102 when gripping the tab 100.

[0075] Variations Next, modified examples of the paper container 10 and blank 30 according to this embodiment will be described with reference to Figures 11 to 16. In Figures 11 to 16, the same parts as those in the embodiment shown in Figures 1 to 10 are designated by the same reference numerals, and detailed explanations will be omitted.

[0076] (First Modification) 11, no notch 105 is formed at the tip of the tab 100. In this case, the molded film 40 may cover the entire area of ​​the tab 100 in a plan view and may protrude from the tab 100. This makes it easier for consumers to pick up the molded film 40.

[0077] 12, in the present modification, the first notch 113 is not formed at the tip of the first tab piece 111 in the blank 30. Also, the second notch 114 is not formed at the tip of the second tab piece 112.

[0078] In this modification, a consumer can also pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the molded film 40 with the fingers of the other hand. This allows the molded film 40 to be easily peeled off from both the first flange piece 25a and the second flange piece 25b.

[0079] (Second Modification) In the example shown in FIG. 13, the first tab piece 101 and the second tab piece 102 are not symmetrical with respect to each other. In this case, for example, the length of the second tab piece 102 may be longer than the length of the first tab piece 101. For example, the second tab piece 102 may be formed over the entire area of ​​the second flange piece 25b. In this case, the outer edge of the second tab piece 102 may extend linearly along the longitudinal direction of the second flange piece 25b. In this case, when producing the paper container 10, the film 40a adhered to the paper container 20 can be cut using, for example, a round-blade cutter. This makes it easy to cut the film 40a. In this specification, the length of the first tab piece (second tab piece) refers to the length along the longitudinal direction of the flange piece on which the first tab piece (second tab piece) is formed.

[0080] 14, in the present modification, the first tab piece 111 and the second tab piece 112 are not symmetrical with respect to each other in the blank 30. In this case, the length of the second tab piece 112 may be longer than the length of the first tab piece 111.

[0081] In this modification, a consumer can also pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the molded film 40 with the fingers of the other hand. This allows the molded film 40 to be easily peeled off from both the first flange piece 25a and the second flange piece 25b.

[0082] 15, the notch 105 does not have to be formed at the tip of the tab 100. In this case, the molded film 40 may cover the entire area of ​​the tab 100 in a plan view. Although not shown, the molded film 40 may protrude from the tab 100. This makes it easier for consumers to pick up the molded film 40.

[0083] 16, the blank 30 does not necessarily have to have a first cutout 113 at the tip of the first tab piece 111. The blank 30 does not necessarily have to have a second cutout 114 at the tip of the second tab piece 112.

[0084] Even in this case, the consumer can pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the molded film 40 with the fingers of the other hand, which allows the molded film 40 to be easily peeled off from both the first flange piece 25a and the second flange piece 25b. [Example]

[0085] Next, a specific example of the above embodiment will be described.

[0086] Example 1 First, a blank material 30 shown in Fig. 7 was prepared. In this case, the blank material 30 was made of a material having a basis weight of 350 g / m 2 The coated paper was then punched into a predetermined shape to produce a blank 30.

[0087] Next, the obtained blank material 30 was attached to the cavity side mold 60 and assembled to produce the paper container 20.

[0088] Next, a film (thickness: 120 μm) having the following layer structure was prepared as the formed film 40. PE(40μm) / Ionomer(40μm) / PE(40μm) Next, a film was laminated on the surface of the paper container 20 to produce a paper container 10.

[0089] Next, a film having the following layer structure was prepared as the lid material 50, and the paper container 10 was sealed with the film. PET (12 μm) / PE (50 μm) In this way, a paper container with a lid 1 shown in FIG. 1 was produced.

[0090] (1) Openability evaluation test Next, an evaluation test for ease of opening was conducted. First, the lid member 50 was removed from the paper container 10 of the fabricated lidded paper container 1. Then, the ease of removing the lid member 50 was evaluated.

[0091] (2) Peelability evaluation test Next, a peelability evaluation test was conducted, in which the molded film 40 was peeled off from the paper container 20 of the paper container 10. Then, the ease of peeling off the molded film 40 was evaluated.

[0092] Example 2 An openability evaluation test and a peelability evaluation test were carried out in the same manner as in Example 1, except that a paper container 10 shown in FIG. 11 was produced.

[0093] Example 3 An openability evaluation test and a peelability evaluation test were carried out in the same manner as in Example 1, except that a paper container 10 shown in FIG. 13 was produced.

[0094] Example 4 An openability evaluation test and a peelability evaluation test were carried out in the same manner as in Example 1, except that a paper container 10 shown in FIG. 15 was produced.

[0095] (Comparative Example 1) An openability evaluation test and a peelability evaluation test were conducted in the same manner as in Example 1, except that a paper container 10A was produced that included a paper container 20A that did not have a first tab piece 101 formed thereon, as shown in Fig. 17. In this case, first, a blank 30A that did not have a first tab piece 111 formed thereon was produced, as shown in Fig. 18. Then, the blank 30A was used to produce the paper container 10A shown in Fig. 17. Then, an openability evaluation test and a peelability evaluation test were conducted.

[0096] The results are shown in Table 1.

[0097] [Table 1]

[0098] In the column for the openability evaluation test in Table 1 above, "◯" means that the lid material could be easily removed from the paper container.

[0099] In the peelability evaluation test column in Table 1, "○" means that the formed film was easily peeled from the paper container, and "×" means that it was difficult to peel the formed film from the paper container.

[0100] As a result, as shown in Table 1, in the paper container with lid according to Comparative Example 1, the lid could be easily removed from the paper container 10A. Also, in the paper containers with lids 1 according to Examples 1 to 4, the lid 50 could be easily removed from the paper container 10.

[0101] On the other hand, with the paper container 10A according to Comparative Example 1, it was difficult to peel the molded film 40 from the paper container 20A. That is, with the paper container 10A according to Comparative Example 1, the first tab piece 101 was not formed on the paper container 20A, so when an experimenter pinched the second tab piece 102 with the fingers of one hand, they were unable to pinch the first flange piece 25a with those fingers. Therefore, when peeling the molded film 40 from the paper container 20A, the first flange piece 25a and the first side portion 23a were deformed, making it difficult to peel the molded film 40 from the paper container 20A.

[0102] In contrast, with the paper containers 10 according to Examples 1 to 4, the experimenter was able to pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand while pulling the formed film 40 with the fingers of the other hand. In particular, with the paper containers 10 according to Examples 1 and 3, the experimenter was able to easily pinch the formed film 40 at the cutout portion 105. Furthermore, with the paper containers 10 according to Examples 2 and 4, the experimenter was able to easily pinch the first tab piece 101 and the second tab piece 102 with the fingers of one hand. Therefore, the experimenter was able to easily pull the formed film 40 with the fingers of the other hand while pinching the first tab piece 101 and the second tab piece 102 with the fingers of one hand. As a result, the formed film 40 was easily peeled off from the paper container 20.

[0103] 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]

[0104] 1 Paper container with lid 10 Paper containers 20 Paper containers 21 Bottom 22 First broken line 23 Side 24 Second broken line 25 Flange piece 25a First flange piece 25b Second flange piece 30 blanks 31 Bottom Panel 32 First broken line 33 Side Panel 34 Second broken line 35 flange panel 35a First flange panel 35b Second flange panel 40 Forming Film 40b back 50 Lid material 100 tabs 101 First tab piece 102 Second tab piece 103 First notch 104 Second notch 105 Notch 111 First tab piece 112 Second tab piece 113 First notch 114 Second notch

Claims

1. a bottom panel; a plurality of side panels connected to the bottom panel via first fold lines; a plurality of flange piece panels connected to each of the side panels via second fold lines, A gap is formed between the side panels, A first tab piece is formed on one flange piece panel, a second tab piece that forms a tab together with the first tab piece is formed on another flange piece panel that faces the one flange piece panel across the gap; In a plan view, the first tab piece protrudes away from the center of the bottom panel in a direction perpendicular to the inner edge of the one flange piece panel, more than other portions of the one flange piece panel; In a plan view, the second tab piece protrudes away from the center of the bottom panel in a direction perpendicular to the inner edge of the other flange piece panel, further than other portions of the other flange piece panel; a first notch is formed at the tip of the first tab piece; A blank material having a second notch formed at the tip of the second tab piece, the second notch forming a notch together with the first notch.

2. a bottom panel; a plurality of side panels connected to the bottom panel via first fold lines; a plurality of flange piece panels connected to each of the side panels via second fold lines, A gap is formed between the side panels, A first tab piece is formed on one flange piece panel, a second tab piece that forms a tab together with the first tab piece is formed on another flange piece panel that faces the one flange piece panel across the gap; a first notch is formed at the tip of the first tab piece; A blank material having a second notch formed at the tip of the second tab piece, the second notch forming a notch together with the first notch.

3. 3. The blank material according to claim 1, wherein the width of the first tab piece in the one flange piece panel is wider than the width of the other portion.

4. 4. The blank material according to claim 1, wherein the width of the second tab piece in the other flange piece panel is wider than the width of the other portion.

5. A paper container manufactured by assembling the blank material according to any one of claims 1 to 4; A paper container comprising a formed film laminated on the surface of the paper container.

6. a paper container having 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 a formed film laminated on the surface of the paper container, The side portions are adjacent to each other and are not continuous with each other, A first tab piece is formed on one flange piece, a second tab piece is formed on another flange piece adjacent to the one flange piece, the first tab piece and the second tab piece form a tab for peeling the formed film from the paper container, In a plan view, the first tab piece protrudes away from the center of the bottom portion in a direction perpendicular to an inner edge of the first flange piece, more so than other portions of the first flange piece, In a plan view, the second tab piece protrudes away from the center of the bottom portion in a direction perpendicular to an inner edge of the other flange piece, further than other portions of the other flange piece, a first notch is formed at the tip of the first tab piece; a second notch portion is formed at the tip of the second tab piece, and the first notch portion and the second notch portion form a notch portion at the tip of the tab.

7. a paper container having 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 a formed film laminated on the surface of the paper container, The side portions are adjacent to each other and are not continuous with each other, A first tab piece is formed on one flange piece, a second tab piece is formed on another flange piece adjacent to the one flange piece, the first tab piece and the second tab piece form a tab for peeling the formed film from the paper container, a first notch is formed at the tip of the first tab piece; a second notch portion is formed at the tip of the second tab piece, and the first notch portion and the second notch portion form a notch portion at the tip of the tab.

8. The paper container according to claim 7 , wherein the back surface of the formed film is exposed at the cutout portion.

9. The paper container according to claim 6 or 7, wherein the width of the first tab piece in one flange piece is wider than the width of the other portion.

10. The paper container according to claim 6 , wherein the width of the second tab piece in the other flange piece is wider than the width of the other portion.

11. The paper container according to any one of claims 5 to 10, A paper container with a lid, comprising a lid that seals the paper container.

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