Packaging container design method, packaging container, packaging container packing method

Abstract

To provide a packaging container design method that contributes to improvement of labeling and storage conditions of contents, and contributes to improvement of preservation conditions of food, a packaging container made by the design method, and a packing method using the packaging container.SOLUTION: There is provided a packaging container design method in which a label L is attached substantially at a center 11a of a back surface 11 of a bottom part 1, in which a protrusion 2 is designed to protrude from the back surface 11 toward a front surface, and a concave edge 21 of the protrusion generated on the back surface 11 is designed so as not to overlap the vicinity of a peripheral edge L1 of the label.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a design method for a packaging container that seals a container body containing contents with a lid, a packaging container designed by the above design method, and a packing method for the above packaging container.

Background Art

[0002] Conventionally, for example, packaging containers for foods such as fresh foods and prepared foods sold in supermarkets and convenience stores have included a container body for containing the food and a lid for closing the opening of the container body. The container body had problems such as stability in the state of containing the food, volume increase, and the position and method of attaching a label displaying the variety of the food. The lid had problems such as airtightness with respect to the container body and arrangement with respect to the label.

[0003] Patent Document 1 discloses a container body in which a pyramidal recess recessed from the outside to the inside is formed on the bottom surface, and a recess recessed from the outside to the inside is formed on the side wall. When the height of the pyramidal recess on the bottom surface is 1 / 4 or more of the depth of the container, it has an effect of easily preventing unnecessary movement of the food in the container. The recess on the side wall has an effect of positioning the label. The container body is covered with a known wrap film adopted as a lid.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in Patent Document 1, the label is applied over the wrap film, extending across the top, sides, and bottom of the container body, which may hinder the removal of the wrap film. Furthermore, the specifications of the container body and label may become complicated due to the need to consider the area of ​​application of the label on the top surface of the container body and the content of the display, as well as the requirement that the length of the label not extend to the pyramidal recess on the bottom surface.

[0006] The simpler the specifications of the label, such as its shape and size, are compared to the specifications of the container body and lid, the less burden it may be to determine the label specifications. In other words, it is preferable that the specifications of the container body and lid are suitable for the label specifications. That is, the inventors, through ingenuity and effort, arrived at a container body that makes it easy to determine the label placement and reduces the application process, while also achieving stability in the food's contents, increased volume, airtightness with the lid, and consequently extending the food's shelf life.

[0007] Therefore, the objective of the present invention is to contribute to improving the application of labels and the storage condition of contents, and another objective of the present invention is to contribute to further improving the preservation condition of contents by designing a packaging container, a packaging container according to the above design method, and a packing method using the above packaging container. , as well as packaging and packing method for the above packaging The objective is to provide. [Means for solving the problem]

[0008] In other words, the present invention is a method for designing a packaging container in which a label is attached approximately in the center of the back surface of the bottom, characterized in that the container is designed so that a projection protrudes from the back surface toward the front surface, and the recessed edge of the projection on the back surface is positioned so that it does not overlap with the peripheral edge of the label. With this configuration, the label can be securely attached to the underside of the bottom regardless of its size or shape, using the approximate center of the underside as a reference point. This makes it less likely for the label to peel off from the underside, and because the contents are placed on the bottom via the protrusions, it is expected to have the effect of visually increasing the volume of the contents relative to the actual capacity.

[0009] Furthermore, it is desirable that the recessed edge of the protrusion be designed to be located towards the center of the back surface of the bottom of the label, rather than near the peripheral edge. This configuration allows for more secure attachment of the label to the underside of the bottom, using the approximate center of the underside and the outer edge of the protrusion as a reference point, in other words, the peripheral edge of the bottom as the reference point.

[0010] Furthermore, it is desirable that the protrusion be designed to have a first protrusion that protrudes near the center of the bottom surface and a second protrusion that protrudes spaced apart from the first protrusion. The position of the second protrusion relative to the first protrusion is not limited and may be on one or both sides, one or both sides, or both sides of the top and bottom when the packaging container is viewed from above. This configuration allows for the support and serving of contents using both the first and second protrusions, and also enables serving in the same or different diagonal orientations by utilizing the height difference with the bottom.

[0011] Furthermore, the present invention relates to a packaging container designed using the above design method, characterized by comprising a bottom portion, a side wall portion formed continuously upward from the peripheral edge of the bottom portion, and a flange portion formed to extend outward from the side wall portion. This configuration allows for the provision of protrusions designed to match the height of the side walls, and a heat-sealed top seal on the flange, which improves the appearance of the contents, provides high airtightness, and facilitates the adoption of a packaging method (so-called MAP, an abbreviation for Modified Atmosphere Packaging) that maintains the freshness of the contents by replacing the air inside the container with a special gas composed of nitrogen, oxygen, carbon dioxide, and other molecules, excluding impurities. Furthermore, the present invention relates to a packing method for the above-mentioned packaging container, characterized in that it includes the steps of: placing the contents on the bottom surface; attaching a top seal to the flange portion; and directly attaching a label to the back surface of the bottom. With this configuration, once the contents are placed, the label can be applied immediately after the top seal is applied, the top seal can be applied after the label is applied, or the top seal and label can be applied simultaneously, thus shortening the time required for the process itself and the time between processes. In other words, since the top seal is applied to the packaging container from above the flange and the label is applied from below the bottom, the processes do not interfere with each other, making it easy to rearrange the processes flexibly.

[0012] Furthermore, the present invention relates to a packaging body comprising: a container body having a bottom; a side wall portion that rises continuously upward from the peripheral edge of the bottom; a flange portion that extends continuously outward from the upper edge of the side wall portion; and a projection that protrudes from the back surface of the bottom toward the front surface; a label attached to the back surface of the bottom; contents placed on the projection and exceeding the height of the flange portion; and a top seal attached to the flange portion, wherein the top seal is formed to be in contact with the contents, and the label is positioned such that the recessed edge of the projection on the back surface of the bottom is closer to the center than the peripheral edge of the label. Furthermore, it is desirable that the distance from the recessed edge of the projection to the peripheral edge of the label be 1 mm or more. Furthermore, it is desirable that the distance from the peripheral edge of the back surface of the bottom to the peripheral edge of the label be 3 mm or more. Furthermore, it is desirable that the distance from the peripheral edge of the back surface of the bottom to the peripheral edge of the label be 20 mm or less. Furthermore, the present invention is a packing method for the above-mentioned packaging body, characterized by comprising the steps of: placing the contents on the projection; attaching the top seal to the flange portion; and directly attaching the label to the underside of the bottom portion.

Advantages of the Invention

[0013] According to the present invention, it is expected to achieve an improvement in label attachment and an improvement in the accommodation state of the contents. In addition, it is also expected to achieve an improvement in the storage state of the contents.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view of a packaging container in an embodiment of the present invention. [Figure 2] It is a bottom view of the above packaging container. [Figure 3] It is an end view of the X-X portion in the bottom view of the above packaging container. [Figure 4] It is a plan view of the above packaging container. [Figure 5] It is a front view of the above packaging container. [Figure 6] It is a perspective view of another packaging container in an embodiment of the present invention. [Figure 7] It is a bottom view of the above packaging container. [Figure 8] It is an end view of the X-X portion in the bottom view of the above packaging container. [Figure 9] It is a plan view of the above packaging container. [Figure 10] It is a front view of the above packaging container. [Figure 11] It is a left side view of the above packaging container. [Figure 12] It is a perspective view of yet another packaging container in an embodiment of the present invention. [Figure 13] It is a bottom view of the above packaging container. [Figure 14] It is an end view of the X-X portion in the bottom view of the above packaging container. [Figure 15] It is a plan view of the above packaging container. [Figure 16] It is a front view of the above packaging container. [Figure 17] It is a left side view of the above packaging container. [Modes for carrying out the invention]

[0015] The following describes an example of the design method for the above-mentioned packaging container (hereinafter also referred to as "the design method for the packaging container"), referring to the examples of molded packaging containers shown in Figures 1 to 5. In these figures, for identical parts that exist in multiple locations, only one part is numbered. For the sake of explanation, designated parts and their leader lines are shown with hidden lines (dashed lines) or imaginary lines (dotted lines), and cross-sectional areas are shown with hatching. In the explanation, terms indicating directions such as up, down, side, outward, inward, vertical, and horizontal are basically based on the state in which the packaging container is installed in the orientation it is normally used in, and when other directions are used as a reference, they will be explained as appropriate.

[0016] <Overview of the packaging container> As shown in Figure 1, this packaging container is for packaging processed foods such as chikuwa, hanpen, and fried foods, as well as fresh produce, prepared foods, and bento boxes sold in retail stores such as supermarkets. Preferably, it is for packaging soft contents that do not easily retain their original shape, and comprises a container body M for containing the contents and a lid (not shown) that covers the container body M. The packaging container is preferably large enough to be placed on a display shelf in a retail store. The packaging container may be in a normal packaging form in which the inside of the container body M is sealed with only the lid, or it may be a MAP (Multi-Purpose Adhesive) type. The shape of the packaging container is front-to-back symmetrical and / or left-to-right symmetrical, but it may be asymmetrical on one side or both sides.

[0017] <Overview of Container Body M> The container body M comprises a bottom portion 1 on which the contents are placed, a side wall portion 3 that rises continuously upward from the peripheral edge of the bottom portion 1, and a flange portion 4 that extends continuously outward from the upper edge of the side wall portion 3. The plan view shape of the container body 1 corresponds to the shape of the outer peripheral edge of the flange portion 4 and is rectangular, but may be square, pentagonal or more, circular or elliptical. The plan view shape of the bottom portion 1 may be the same as or different from the plan view shape of the container body 1. The upper edge of the side wall portion 3 may correspond to the upper edge of a fitting portion (not shown) that fits with an internally fitting lid.

[0018] <Specifications of container body M, including material, molding method, dimensions, etc.> The container body M is molded using a synthetic resin sheet as the base material. The synthetic resin sheet is polystyrene paper (PSP) made of polystyrene resin, but may also be made of polyester resin such as polyethylene terephthalate, or olefin resin such as polyethylene or polypropylene, and may consist of a single layer or multiple layers, and may be colored, colorless and transparent, or opaque, and may be formed from a heat-resistant material. The synthetic resin sheet is formed by thermoforming such as vacuum forming, hot plate pressure forming, vacuum pressure forming, or double-sided vacuum forming. The surface and / or back surface of the synthetic resin sheet may be covered with a synthetic resin film. The synthetic resin film may consist of a single layer or multiple layers having heat resistance, oil resistance, suitability for lamination with a printed layer, gas barrier properties, etc., and may include a printed layer if it covers the surface of the synthetic resin sheet.

[0019] In other words, the synthetic resin sheet may be made of foamed resin or non-foamed resin. There are no particular restrictions on the thickness of the synthetic resin sheet, but for low-foaming resins with a foaming ratio of 1.5 to 3 times, it should be 0.5 to 3 mm, preferably 1 to 2 mm; for high-foaming resins with a foaming ratio of 5 to 15 times, it should be 1.5 to 5 mm, preferably 2 to 4 mm, more preferably 2.5 to 3.5 mm; and for non-foaming resins, it should be 0.2 to 1.0 mm, preferably 0.23 to 0.65 mm, and even more preferably 0.23 to 0.45 mm. The foaming ratio is calculated by measuring the specific volume (unit: cc / g) of the material before foaming (foaming composition) and the material after foaming (foaming sheet), and dividing the specific volume after foaming by the specific volume before foaming.

[0020] For synthetic resin sheets, polystyrene paper (PSP) made of polystyrene resin or heat-resistant polystyrene paper (heat-resistant PSP) with added heat resistance is particularly preferred. By using heat-resistant PSP, consumers can heat it in a microwave oven at home. Here, heat-resistant PSP is defined as a resin composition mainly composed of heat-resistant polystyrene resin with a glass transition temperature of 110°C or higher, as measured in accordance with JIS K7121. In order to obtain a resin composition with a glass transition temperature of 110°C or higher, the heat-resistant polystyrene resin used is preferably a resin containing polystyrene resin and polyphenylene ether resin, or at least one resin selected from styrene-methacrylic acid copolymer, styrene-maleic anhydride copolymer, styrene-maleimide copolymer, and poly-p-methylstyrene. Heat-resistant PSP is obtained by extruding a resin composition mainly composed of these resins into a sheet and foaming it. Heat-resistant PSP may contain 50% by mass or more of heat-resistant polystyrene resin based on the mass of the heat-resistant PSP.

[0021] There are no particular restrictions on the basis weight of these PSPs or heat-resistant PSPs, but 120-210 g / m² is recommended. 2 Preferably, it is 130-190 g / m². 2 It is more preferable that it be 140-160 g / m 2It is even more preferable that this is the case. Furthermore, there are no particular restrictions on the sheet thickness (primary thickness) of PSP or heat-resistant PSP before molding, but it is preferably 1.0 to 2.5 mm, and more preferably 1.5 to 2.0 mm.

[0022] There are no particular restrictions on the thickness of the container body M, but the thickness of the flange portion should be 2.0 to 3.5 mm, and preferably 2.5 to 3.0 mm.

[0023] <Overview of the lid> The lid covers the opening of the container body M and is preferably a top seal composed of one or more layers having gas barrier properties that adhere to the flange portion 4 of the container body M. However, it may also be a molded lid made of the same or different material as the container body M and thermoformed, or a wrap film. In the case of a molded lid, it may be either an external or internal fitting type for the container body M. The top seal may be attached to the flange portion 4 by heat welding (fusion) or by a predetermined adhesive.

[0024] <Overview of Label L> Label L may be based on publicly known technology and may be rectangular, square, pentagonal or multi-sided, circular, or elliptical in shape, and may or may not be similar in shape to the peripheral edge of the base 1. The size of label L is at least smaller than the area of ​​the base 1, and in the case of a rectangle, the long side may be, for example, 50mm to 150mm, 60mm to 110mm, or 70mm to 100mm. The short side may be, for example, 20mm to 100mm, 30mm to 70mm, or 35mm to 60mm. Information such as text and diagrams related to the contents is displayed on the surface of label L, and an adhesive that adheres directly to the base 1 is applied to the back surface, preferably an adhesive suitable for adhesion to polystyrene paper (PSP).

[0025] <Details of bottom 1> As shown in Figures 1 and 2, the bottom portion 1 has projections 2 that protrude from the bottom surface 11 toward the bottom surface 12. In other words, the projections 2 are designed to protrude from the bottom surface 11 toward the bottom surface 12. The bottom surface 11 has unnumbered recesses formed by the projections 2, and there may or may not be other recessed areas or protruding areas, and there may be one or more flat areas with approximately zero flatness where there are no recessed areas and / or protruding areas, and if there are multiple, preferably each flat area is horizontal and of the same height, although they may be continuous or discontinuous. The bottom portion 1 may have projections (not shown) for anti-slip or rigidity purposes where recesses are not formed on the bottom surface 11 or the bottom surface 12. The bottom portion 1 may have bottom legs (not shown) that protrude from the bottom surface 12 toward the bottom surface 11, and the bottom legs may be formed continuously with the side wall portion 3, and the height of the bottom legs may be low or high.

[0026] The peripheral edge of the bottom surface 11 is uneven, but may also be straight. The center 11a of the bottom surface and the center of the label L may be exactly the same, approximately the same, or different. The shortest distance W1 from the peripheral edge of the bottom surface 11 to the peripheral edge of the label L is 3 mm to 20 mm, preferably 5 mm to 15 mm, and more preferably 8 mm to 12 mm. If it is less than 3 mm, it may be difficult to position and apply the label L and the label L may peel off easily. If it is more than 20 mm, it may be too small relative to the area of ​​the bottom surface 11.

[0027] <Details of protrusion 2> As shown in Figure 2, the recessed edge 21 of the projection 2 on the bottom surface 11 side is designed to be in a position that does not overlap with the peripheral edge L1 of the label L, and is located closer to the center 11a of the bottom surface than the peripheral edge L1 of the label L. The projection 2 is designed to have a first projection 2a that protrudes near the center 11a of the bottom surface, and second projections 2b, 2b that protrude spaced apart from the first projection 2a. In a plan view, with the long side of the bottom 1 as the reference, the first projection 2a is H-shaped, and the second projections 2b, 2b are vertically elongated and located on both the left and right sides of the first projection 2a, but they may also be located above and below, and each has a first projection recessed edge 21a and second projection recessed edges 21b, 21b equivalent to their respective shapes. With the first projection 2a as the reference, the second projections 2b, 2b may be at equal intervals or at different intervals.

[0028] As shown in Figure 3, the height to the top of the first projection 2a and the height to the top of each of the second projections 2b, 2b are equal, but may be different, and each height is lower than the height to the top of the flange portion 4, but may be higher, preferably less than equal to this height. For example, the ratio (H1:H2) of the height H1 of the first projection 2a to the height H2 of the flange portion 4 is 1:10 to 15:10, more preferably 2:10 to 10:10, and even more preferably 4:10 to 8:10. If the height H1 of the first projection 2a is less than 1:10 relative to the height H2 of the flange portion 4, it is difficult to obtain the effect of the first projection 2a, and if it is greater than 15:10, the top seal may interfere with the first projection 2a. The center of the first projection 2 coincides with the center 11a of the bottom surface, and a predetermined range including this center is located higher than the bottom surface 11, but may be located at the same height. The inclination of the first projection 2a is steeper on the outside than on the side of the center 12a of the bottom surface, while the inclination of the second projections 2b,2b is gentler on the outside than on the side of the center 12a of the bottom surface.

[0029] The projections 2 may be singular or multiple, spaced apart from each other. In both cases, the plan view shape of each projection may be a triangle, rectangle, trapezoid, other quadrilateral, rectangle with pentagons or more, circle, ellipse, or any other arbitrary shape, and the end face shape may be arc-shaped, mountain-shaped, or square. The projections 2 may be positioned so as to overlap with the center 11a of the bottom surface, or they may be positioned around the center 11a of the bottom surface without overlapping. When there are multiple projections 2, there are preferably a maximum of five. If there are more than five, the proportion of the bottom surface 11 may be too large, making it difficult to place contents. The ratio of the projected area of ​​the projections 2 to the area of ​​the bottom 1 is 1:10 to 1:2. If the projected area of ​​the projections 2 is less than 1:10 relative to the area of ​​the bottom 1, it may be difficult to obtain the desired effect, and if it is greater than 1:2, it may be difficult to place contents. The projection recess 21 may be the same shape as the plan view shape of the projections 2 or a different shape, and may be rectangular, circular, or elliptical. The size of the projection recess 21 may be equal to, larger than, or smaller than the projected area of ​​the projection 2. The shortest distance W2 from the projection recess 21 to the peripheral edge of the label L is 1 mm or more, preferably 3 mm or more, and more preferably 5 mm or more. If it is less than 1 mm, the label L may be difficult to position and apply, and the label L may peel off easily.

[0030] The area of ​​the protruding recessed edge 21, specifically the sum of the areas of the first protruding recessed edge 21a and the second protruding recessed edges 21b, 21b shown in Figure 2 (total area), is 5 cm². 2 Even if it is more than 10cm 2 It may be greater than or equal to the area of ​​the protruding recessed edge 21 covered by the label L, or the area of ​​the first protruding recessed edge 21a or the second protruding recessed edges 21b, 21b, is 5 cm². 2 Even if it is more than 10cm 2 That's fine too.

[0031] <Details of side wall section 3> As shown in Figures 4 and 5, the side wall portion 3 is designed to have a first side wall projection 3a that continuously protrudes inward from the short side, a second side wall projection 3b that continuously protrudes inward from the long side, and a third side wall projection 3c that continuously protrudes inward from the corner portion where the short side and the long side intersect. This configuration is expected to create a sense of volume from the contents while preventing the contents from spilling onto the flange portion 4. The first side wall projection 3a, the second side wall projection 3b, and the third side wall projection 3c are continuous with the bottom portion 1, but do not have to be continuous, and are not continuous with the projection 2, but may be continuous. The heights from the bottom surface 12 to the vertices of the first side wall projection 3a, the second side wall projection 3b, and the third side wall projection 3c may be the same or different, and may be all, one or two, or two higher or lower than the height of the first projection 2a.

[0032] <Details of flange portion 4> As shown in Figure 3, the flange portion 4 has a substantially horizontal, unnumbered flat portion when viewed from the vertical end face, preferably with a width of 3 mm or more, more preferably 4 mm or more, as a width of less than 3 mm may make it difficult to adhere to the top seal or cause the top seal to peel off easily.

[0033] <Packing method for this packaging container> The packing method for the packaging container shown in Figure 1 includes a first step of placing the contents on the bottom surface 12 of the bottom 1, a second step of attaching the top seal to the flange 4, and a third step of directly attaching a label to the bottom back surface 11 of the bottom 1. In the first step, the contents may be placed by an operator or by a predetermined device. In the second step, the top seal may be heat-sealed using a top sealing machine. In the third step, the printed label may be attached by an operator or by a predetermined device. The second step may be performed before or after the third step, or simultaneously with the third step.

[0034] In the second step, the packaging method disclosed in Japanese Patent Publication No. 2019-34757 may be adopted. Specifically, if the contents placed in the first step exceed the height of the flange portion 4, the top seal used in the second step may be larger than the size used when the contents do not exceed the height of the flange portion 4, and may be attached to the flange portion 4 by a dedicated tray sealer in a loose state so as not to crush the contents, forming a dome shape.

[0035] This packaging method makes it possible to create a packaging container in which a top seal (top film) is attached to the flange portion of the container body (storage container) that contains the contents (packaged items), and the top film is formed in a dome shape so that it is in contact with the packaged items.

[0036] <Regarding the design methods for alternative packaging containers, etc.> Next, referring to the examples of packaging containers shown in Figures 6 to 11 and Figures 12 to 17, we will explain the differences between the design method of the above-mentioned packaging containers and the design method of the packaging containers shown in Figures 1 to 5, while omitting the explanation of the equivalent parts. To facilitate reference, the parts corresponding to those shown in Figures 1 to 5 are numbered in Figures 6 to 11 and Figures 12 to 17 by adding 100 and 200 to the numbers used in Figures 1 to 5.

[0037] As shown in Figures 6 and 7, the projection 102 of the container body 100M is designed to have a first projection 102a, second projections 102b, 102b located outside the first projection 102a and spaced apart on both the left and right sides, and third projections 102c, 102c located outside the second projections 102b, 102b and spaced apart on both the left and right sides. The bottom 101 has low bottom legs 113 that protrude all around from the bottom surface 112 toward the bottom underside 111. As shown in Figure 8, the bottom legs 113 are formed in continuous with the side wall 103. As shown in Figure 8, the height of each vertex is highest in the order of the first projection 102a, second projections 102b, 102b, and third projections 102c, 102c. The inclination of the first projection 102a is the same on both the outer side and the center side of the bottom surface, the inclination of the second projections 102b,102b is gentler on the outer side than on the center side of the bottom surface, and the inclination of the third projections 102c,102c is the same on both the outer side and the center side of the bottom surface.

[0038] When viewed from above, with the long side of the base 101 as the reference, the first projection 102a is elongated vertically, the second projections 102b, 102b are trapezoidal, shorter and wider than the first projection 102a, and the third projections 102c, 102c are elongated vertically, longer and narrower than the first projection 102a. The projection recesses 121 have corresponding shapes: the first projection recess 121a, the second projection recess 121b, 121b, and the third projection recess 121c, 121c. The first projection recess 121a, the second projection recess 121b,121b, and the third projection recess 121c,121c are positioned so as not to overlap with the peripheral edge 100L1 of the label, and the first projection recess 121a and the second projection recess 121b,121b are positioned towards the center of the bottom back surface from the peripheral edge 100L1 of the label, while the third projection recess 121c,121c are positioned outside the peripheral edge 100L1 of the label. Preferably, the label 100L is positioned towards the center of the bottom back surface, within a range that does not overlap with the bottom legs 113.

[0039] As shown in Figures 9 to 11, the side wall portion 103 is designed so as not to have any protrusions that project inward, but it may be designed to have certain protrusions as long as they do not interfere with the protrusions 102.

[0040] As shown in Figures 12 and 13, the projection 202 of the container body 200M is designed to have a first projection 202a and second projections 202b, 202b located outward and spaced apart from the first projection 202a. The bottom 201 has bottom legs 213 that project from the bottom surface 212 toward the bottom underside 211. The bottom legs 213 have first bottom legs 213a, 213a that are formed from both short sides through the corners to the ends of the long sides, and second bottom legs 213b, 213b that are formed in the center of the long sides. The bottom legs 213 are formed in continuous with the side walls 203. As shown in Figure 14, the height of each vertex is highest in the order of the first projection 202a, then the second projections 202b, 202b. The inclination of the first projection 202a is the same on both the outer side and the central side of the bottom surface, while the inclination of the second projections 202b,202b is gentler on the outer side than on the central side of the bottom surface.

[0041] In a plan view, using the long side of the bottom 201 as a reference, the first projection 202a is elongated vertically, and the second projections 202b, 202b are shorter and wider oval-shaped than the first projection 202a, and each projection has a recessed edge 221a, 221b, and corresponding recessed edges 221a, 221b. The first projection recessed edge 221a and the second projection recessed edges 221b, 221b are positioned so as not to overlap with the peripheral edge 200L1 of the label, and are designed to be located towards the center of the bottom surface relative to the peripheral edge 200L1 of the label. Preferably, the label 200L is located towards the center of the bottom surface relative to the bottom legs 213.

[0042] As shown in Figures 15 to 17, the side wall portion 203 is designed so as not to have any projections that protrude inward, but it may be designed to have certain projections as long as they do not interfere with the projections 202 and the bottom legs 213.

[0043] Furthermore, the packaging container design method described in this embodiment is not limited to the above, and includes the design of the position, shape, dimensions, and relationships between any part, as long as equivalent effects can be obtained. [Explanation of symbols]

[0044] Container bodies of M, 100M, and 200M Bottoms of 1, 101, and 201 Inner surfaces of the bottoms of 11, 111, and 211 Centers of the inner surfaces of the bottoms, 11a Outer surfaces of the bottoms of 12, 112, and 212 Centers of the outer surfaces of the bottoms, 12a Bottom feet of 113 and 213[[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

Claims

1. A container body made of foamed resin having a bottom, a side wall portion that rises continuously upward from the peripheral edge of the bottom, a flange portion that extends continuously outward from the upper edge of the side wall portion, and a projection that protrudes from the back surface of the bottom toward the front surface, The label attached to the underside of the bottom, Contents placed on the aforementioned projection exceeding the height of the flange portion, The flange portion is fitted with a top seal, The top seal is formed to be in contact with the contents, The label is positioned such that the recessed edge of the projection on the back surface of the bottom is closer to the center than the peripheral edge of the label, thereby sealing the recess of the projection. packaging.

2. The container body includes a synthetic resin sheet made of polystyrene paper as a base material. The packaging according to claim 1.

3. A packing method for a package according to claim 1, The steps include placing the contents on the projection, The steps include: attaching the top seal to the flange portion, The steps include: attaching the label directly to the back surface of the bottom portion; A packing method for packaging that includes [a specific type of packaging].

Images