JP2024006949A - Tableware and recycling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide tableware and a method for recycling that can reduce environmental load of tableware while keeping sanitary property of the tableware.

SOLUTION: Tableware 1 includes: a lower tray 10; and an upper tray 20 superposed on the lower tray 10. The upper tray 20 includes a virgin material. The lower tray 10 includes a recycled material.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

TECHNICAL FIELD This disclosure relates to tableware and recycling methods.

2. Description of the Related Art Conventionally, restaurants and the like have used tableware to serve food to customers. As such tableware, for example, disposable tableware is known (for example, Patent Document 1). Patent Document 1 discloses a food container that includes a thin-walled container placed on a rigid container, and the thin-walled container is a disposable container. In this tableware container, since the thin-walled container is disposable, it is possible to save time and effort for cleaning the container, and it is possible to reduce costs.

Utility model registration No. 3191090

Incidentally, in recent years, resins recycled by various methods have been used to manufacture containers with the aim of reducing environmental impact. However, if recycling is repeated, there is a concern that unremoved and accumulated contaminants may be leached to the outside.

The present disclosure has been made in consideration of these points, and aims to provide tableware and a recycling method that can reduce environmental impact while maintaining hygiene.

A first aspect of the present disclosure is a tableware comprising a lower plate and an upper plate stacked on the lower plate, the upper plate containing virgin material, and the lower plate containing recycled material. .

In a second aspect of the present disclosure, in the tableware according to the first aspect described above, the upper plate may be detachably attached to the lower plate.

A third aspect of the present disclosure is the tableware according to the first aspect or the second aspect described above, in which the upper plate may be a sheet molded body, and the lower plate may be an injection molded body. It's okay.

A fourth aspect of the present disclosure is the tableware according to each of the first aspect to the third aspect described above, in which the lower plate has a first side portion and a first side portion connected to the first side portion. The upper plate may include a bottom portion and a first flange portion provided around the first side portion, and the upper plate may include a second side portion and a second bottom portion connected to the second side portion. and a second flange portion provided around the second side portion, and an engaging portion that engages with the first flange portion is formed in the second flange portion. Also good.

According to a fifth aspect of the present disclosure, in the tableware according to the fourth aspect described above, the upper plate may further include a stack portion extending downward from the engaging portion.

According to a sixth aspect of the present disclosure, in the tableware according to the fifth aspect described above, the lower end of the stack portion is located between the lower surface of the first flange portion and the lower surface of the first bottom portion in the vertical direction. You can leave it there.

In a seventh aspect of the present disclosure, in the tableware according to the fifth aspect or the sixth aspect, the second flange portion may be provided with a protruding portion that protrudes upward.

An eighth aspect of the present disclosure is the tableware according to each of the first aspect to the seventh aspect, wherein the upper plate may be made of virgin material.

A ninth aspect of the present disclosure is the tableware according to the eighth aspect described above, in which the upper plate may be made of virgin material containing biomass-derived resin.

A tenth aspect of the present disclosure is the tableware according to each of the first aspect to the seventh aspect, wherein the upper plate has a first layer forming a front surface and a second layer forming a back surface. , a third layer provided between the first layer and the second layer; the first layer and the second layer may be made of virgin material; The third layer may include recycled material or biomass-derived resin.

In an eleventh aspect of the present disclosure, in the tableware according to each of the first aspect to the tenth aspect described above, a through hole may be formed in the lower plate.

A twelfth aspect of the present disclosure provides a step of collecting at least the upper plate of a tableware including a lower plate and an upper plate stacked on the lower plate, and producing the lower plate from the recovered upper plate. This is a recycling method comprising the steps of:

According to the present disclosure, the environmental load of tableware can be reduced while maintaining the hygiene of tableware.

FIG. 1 is an exploded perspective view showing a tableware according to one embodiment. FIG. 2 is a vertical cross-sectional view of a tableware according to one embodiment. FIG. 3 is a cross-sectional view showing the layered structure of the upper plate of tableware according to one embodiment. FIG. 4 is a flowchart illustrating the operation according to one embodiment. FIG. 5 is a vertical sectional view showing a modification of the tableware according to one embodiment. FIG. 6 is an enlarged sectional view (a sectional view corresponding to section VI in FIG. 5) showing a modification of the tableware according to one embodiment. FIG. 7 is a vertical cross-sectional view of a tableware assembly according to one embodiment.

Hereinafter, one embodiment will be described with reference to the drawings. 1 to 4 are diagrams showing one embodiment. Each figure shown below is a schematic view. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. In addition, the present invention can be modified and implemented as appropriate without departing from the technical concept. In each figure shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. Further, the numerical values such as dimensions and material names of each member described in this specification are examples as an embodiment, and can be appropriately selected and used without being limited thereto. In this specification, terms that specify shapes and geometrical conditions, such as terms such as parallel, orthogonal, and perpendicular, are interpreted not only in their strict meanings but also to include substantially the same state.

<Tableware>
First, tableware 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. In addition, in this specification, "upper" and "lower" refer to the upper part and the lower part, respectively, when the tableware 1 is erected (FIG. 2).

As shown in FIGS. 1 and 2, the tableware 1 includes a lower plate 10 and an upper plate 20 stacked on the lower plate 10. In the illustrated example, the lower tray 10 and the upper tray 20 are so-called tray-shaped members.

(lower plate of tableware)
The lower plate 10 has a first side 11 , a first bottom 12 connected to the first side 11 , and a first flange 13 provided around the first side 11 .

The first side portion 11 has an inverted truncated conical shape whose diameter gradually decreases from the top (first flange portion 13 side) to the bottom (first bottom portion 12 side). However, the present invention is not limited to this, and the first side portion 11 may have a substantially cylindrical shape, or the first side portion 11 may have an inverted polygonal shape such as an inverted quadrangular truncated pyramid shape or an inverted octagonal truncated pyramid shape. It may have a truncated pyramid shape, or it may have a cylindrical shape whose horizontal cross section is approximately elliptical.

The first bottom portion 12 has a substantially circular shape in plan view. Although not shown, the first bottom portion 12 may be formed with irregularities such as reinforcing ribs to suppress deformation of the first bottom portion 12. Further, the first bottom portion 12 may have projections and depressions representing various characters, etc. formed thereon. In this case, the design of the lower plate 10 can be improved.

Further, the lower surface of the first bottom portion 12 is a flat surface without unevenness. Thereby, the stability of the tableware 1 can be improved when the tableware 1 is grounded. Note that the lower surface of the first bottom portion 12 may be a smooth curved surface.

A through hole 15 is formed in the first bottom portion 12 . As described above, since the through hole 15 is formed in the first bottom portion 12, the user can press the portion of the upper tray 20 that is exposed from the through hole 15 upward to remove the portion from the lower tray 10. The upper plate 20 can be easily removed. Further, by forming the through hole 15 in the first bottom portion 12, the amount of resin used for the lower plate 10 can be reduced. In the illustrated example, the through hole 15 has a substantially circular shape in plan view. However, the shape is not limited to this, and the through hole 15 may have a shape that shows various characters or the like in a plan view. In this case, the design of the lower plate 10 can be improved.

The first flange portion 13 has a substantially annular shape in plan view. The first flange portion 13 projects horizontally from the upper end of the first side portion 11 toward the side, and the upper surface of the first flange portion 13 is a flat surface.

This lower plate 10 contains recycled material. Thereby, the environmental load of tableware 1 can be reduced. Here, in this specification, "recycled material" refers to resin products that are sorted, crushed, and washed to remove contaminants and foreign substances to obtain flakes, which are then further treated at high temperature and reduced pressure for a certain period of time. A resin material obtained by removing contaminants from inside the resin. The resin constituting the resin material may be polypropylene, polyethylene, polyethylene terephthalate, polystyrene, or ABS resin (acrylonitrile butadiene styrene resin). . In other words, the lower plate 10 may contain polypropylene, polystyrene, polyethylene terephthalate, or ABS resin (acrylonitrile butadiene styrene resin) as a main component.

Moreover, the lower plate 10 may contain resin derived from biomass. Since the lower plate 10 contains biomass-derived resin, the amount of fossil fuel used can be reduced, and the environmental load of the tableware 1 can be reduced.

In this case, the biomass-derived resin may be biomass polyethylene or biomass polypropylene. Biomass polyethylene is a monomer polymer containing ethylene derived from biomass. Since biomass-derived ethylene is used as the raw material monomer, the polymerized polyolefin is biomass-derived. The content of biomass-derived ethylene in the raw material monomer does not need to be 100% by mass, and is, for example, preferably 50% or more, more preferably 80% or more. The raw material monomer may include ethylene derived from fossil fuels, and may also include monomers of α-olefins such as butylene, hexene, and octene.

For example, biomass-derived ethylene can be produced using biomass-derived ethanol as a raw material. In particular, it is preferable to use fermented ethanol derived from biomass obtained from plant materials. The plant raw material is not particularly limited, and conventionally known plants can be used. Conventionally known plants include, for example, corn, sugar cane, beet and manioc.

Furthermore, the biomass-derived resin may be biomass polyester. Biomass polyester refers to polyester obtained from raw materials containing biomass-derived monomers.

The lower plate 10 may be an injection molded product. Thereby, the thickness of the lower plate 10 can be set to any desired thickness. In this case, for example, the rigidity of the first flange portion 13 may be increased by increasing the thickness of the first flange portion 13. The thickness of such a lower plate 10 may be, for example, 0.5 mm or more and 2.0 mm or less in any region of the lower plate 10.

(upper plate of tableware)
Next, the upper plate 20 of the tableware 1 will be explained. The upper plate 20 is detachably attached to the lower plate 10. The upper plate 20 has a second side 21 , a second bottom 22 connected to the second side 21 , and a second flange 23 provided around the second side 21 .

The second side portion 21 has substantially the same shape as the first side portion 11 of the lower plate 10 . That is, the second side portion 21 has an inverted truncated conical shape whose diameter gradually decreases from the top (second flange portion 23 side) to the bottom (second bottom portion 22 side). However, the present invention is not limited to this, and the second side portion 21 may have a substantially cylindrical shape, or the second side portion 21 may have an inverted polygonal shape such as an inverted quadrangular truncated pyramid shape or an inverted octagonal truncated pyramid shape. It may have a truncated pyramid shape, or it may have a cylindrical shape whose horizontal cross section is approximately elliptical.

The second bottom portion 22 has a substantially circular shape in plan view. Although not shown, the second bottom portion 22 may be formed with irregularities such as reinforcing ribs to suppress deformation of the second bottom portion 22. Further, the second bottom portion 22 may have projections and depressions representing various characters, etc. formed thereon. In this case, the design of the upper plate 20 can be improved.

Further, the lower surface of the second bottom portion 22 is a flat surface without irregularities. Thereby, when the upper plate 20 is attached to the lower plate 10, the stability of the upper plate 20 can be improved. Note that the lower surface of the second bottom portion 22 may be a smooth curved surface.

The second flange portion 23 has a substantially annular shape in plan view. The second flange portion 23 projects horizontally from the upper end of the second side portion 21 toward the side, and the upper surface of the second flange portion 23 is a flat surface.

An engaging portion 25 that engages with the first flange portion 13 is formed in the second flange portion 23 . The engaging portion 25 extends downward from the lower surface of the second flange portion 23, and has a tip protruding radially inward. This engaging portion 25 is formed over the entire circumference. Thereby, it is possible to prevent the upper plate 20 from being accidentally removed from the lower plate 10. Note that the engaging portion 25 may be formed only in a portion in the circumferential direction.

The upper plate 20 contains virgin material. Thereby, even if the lower plate 10 contains recycled materials, the hygiene of the tableware 1 can be maintained. Here, in this specification, "virgin material" refers to a resin material that has not been subjected to recycling treatment, that is, an unused resin material, and refers to a resin material listed in the positive list of Food Sanitation Law Notification No. 370. means.

The upper plate 20 may be made of virgin material. That is, in the upper plate 20, the content of the virgin material may be 100 parts by mass with respect to 100 parts by mass of the total amount of resin material contained in the upper plate 20.

Moreover, the upper plate 20 may have multiple layers. For example, as shown in FIG. 3, the upper plate 20 includes a first layer 31 forming a front surface (upper surface) 30a, a second layer 32 forming a back surface (lower surface) 30b, and a first layer 31 and a second layer 32 forming a back surface (lower surface) 30b. 32 and a third layer 33 provided therebetween. Here, the front surface 30a is a surface that faces the food, and the back surface 30b is a surface that faces the lower plate 10 (see FIG. 2). Note that the upper plate 20 may have four or more layers.

When the upper plate 20 has the first layer 31, the second layer 32, and the third layer 33, it is preferable that the first layer 31 and the second layer 32 are made of virgin material. Thereby, the hygiene of the tableware 1 can be improved. That is, since the first layer 31 is made of a virgin material, even if the third layer 33 contains a recycled material, it is possible to prevent the food from coming into contact with the recycled material. Furthermore, since the second layer 32 is made of virgin material, even if a plurality of upper plates 20 are stacked and stored, the first layer 31 that contacts the second layer 32 will not come into contact with recycled materials, etc. can be suppressed. Therefore, it is possible to prevent food from coming into contact with recycled materials and the like. As a result, since the first layer 31 and the second layer 32 are made of virgin material, the hygiene of the tableware 1 can be improved. On the other hand, the third layer 33 may contain recycled material or biomass-derived resin. Thereby, the environmental load of tableware 1 can be further reduced.

Although not shown, a laminate sheet may be laminated on the surface 30a of the upper plate 20. In this case, a biaxially stretched polypropylene film or an unstretched polypropylene film may be used as the laminate sheet. When the laminate sheet is a biaxially stretched film, the strength of the upper plate 20 can be effectively increased. Moreover, when the laminate sheet is an unstretched film, the moldability when producing the upper plate 20 by sheet molding can be improved.

The upper plate 20 may contain polypropylene, polystyrene, polyethylene terephthalate, or ABS resin (acrylonitrile butadiene styrene resin) as a main component.

The upper plate 20 may be a sheet molded body. Thereby, the thickness of the upper plate 20 can be reduced, and the total amount of resin used in the tableware 1 can be reduced. The thickness of the upper plate 20 may be, for example, 0.2 mm or more and 2.0 mm or less in any region of the upper plate 20.

Next, the operation of this embodiment having such a configuration, that is, the method of manufacturing tableware 1 and the method of recycling tableware 1 will be explained.

First, the lower plate 10 and the upper plate 20 are manufactured. At this time, the lower plate 10 is produced, for example, by injection molding. Moreover, the upper plate 20 is produced, for example, by sheet molding.

Next, the upper plate 20 is stacked on the lower plate 10, and the engaging portion 25 formed on the second flange portion 23 of the upper plate 20 is engaged with the first flange portion 13 of the lower plate 10. Thereby, the upper plate 20 is attached to the lower plate 10. In this way, the tableware 1 including the lower plate 10 and the upper plate 20 stacked on the lower plate 10 is obtained (see FIGS. 1 and 2).

Next, a method for recycling tableware 1 will be described with reference to FIG. 4.

First, the used tableware 1 is collected (collection process, reference numeral S1 in FIG. 4). At this time, the lower plate 10 and the upper plate 20 may be collected, or only the upper plate 20 may be collected. When collecting only the upper plate 20, the lower plate 10 may be used again by washing it at a restaurant or the like, for example.

Next, a lower plate 10 is produced from the collected tableware 1 (symbols S2 to S4 in FIG. 4). In this case, first, the collected tableware 1 is sorted and washed to remove contaminants and foreign substances, and then crushed (pulverization step, reference numeral S2 in FIG. 4). As a result, resin flakes from which contaminants and foreign substances have been removed are obtained.

Next, resin pellets are produced from the obtained resin flakes (pellet production step, reference numeral S3 in FIG. 4).

Thereafter, the lower plate 10 is manufactured by, for example, injection molding using the obtained resin pellets (molding step, reference numeral S4 in FIG. 4).

In this way, the lower plate 10 containing recycled material is obtained.

As described above, according to the present embodiment, the tableware 1 includes the lower plate 10 and the upper plate 20 stacked on the lower plate 10. Moreover, the upper plate 20 contains virgin material. This makes it possible to prevent recycled materials and the like from being exposed from the surface on which food is placed. Therefore, the hygiene of the tableware 1 can be maintained. Furthermore, the lower tray 10 contains recycled material. Thereby, the environmental load of tableware 1 can be reduced.

Further, according to the present embodiment, the upper plate 20 is detachably attached to the lower plate 10. Thereby, the upper plate 20 can be easily recycled. Therefore, the environmental load of tableware 1 can be further reduced. Moreover, by recycling the upper plate 20, the effort of cleaning the upper plate 20 can be saved, and costs can be reduced.

Moreover, according to this embodiment, the upper plate 20 is a sheet molded body. Thereby, the thickness of the upper plate 20 can be reduced, and the amount of resin used in the tableware 1 can be reduced. Further, the lower plate 10 is an injection molded product. Thereby, the thickness of the lower plate 10 can be set to an arbitrary thickness, and the rigidity of the lower plate 10 can be increased. Therefore, it is possible to easily obtain the tableware 1 which can have high rigidity while reducing the environmental load.

Further, according to the present embodiment, the second flange portion 23 of the upper plate 20 is formed with an engaging portion 25 that engages with the first flange portion 13 of the lower plate 10. Thereby, the upper plate 20 can be securely attached to the lower plate 10.

Further, according to this embodiment, the upper plate 20 is made of virgin material. Thereby, the hygiene of the tableware 1 can be further improved.

Further, according to the present embodiment, the upper plate 20 is made of virgin material containing biomass-derived resin. Thereby, the environmental load of tableware 1 can be further reduced.

Further, according to the present embodiment, the upper plate 20 is arranged between the first layer 31 forming the front surface 30a, the second layer 32 forming the back surface 30b, and between the first layer 31 and the second layer 32. A third layer 33 is provided. Furthermore, the first layer 31 and the second layer 32 are made of virgin material, and the third layer 33 contains recycled material or biomass-derived resin. Thereby, the environmental load of the tableware 1 can be further reduced while maintaining the hygiene of the tableware 1.

Furthermore, according to the present embodiment, a through hole 15 is formed in the lower plate 10. Thereby, the user can easily remove the upper plate 20 from the lower plate 10 by pressing upward on the portion of the upper plate 20 exposed from the through hole 15. Further, by forming the through hole 15 in the lower plate 10, the amount of resin used in the lower plate 10 can be reduced.

In addition, in this embodiment mentioned above, although the lower plate 10 and the upper plate 20 demonstrated the example which is a so-called tray-shaped member, it is not restricted to this. For example, although not shown, the lower plate 10 and the upper plate 20 may each be cup-shaped members.

Furthermore, in the present embodiment described above, an example has been described in which the second flange portion 23 of the upper plate 20 is formed with the engaging portion 25 that engages with the first flange portion 13 of the lower plate 10. In this case, as shown in FIGS. 5 and 6, the upper plate 20 may further include a stack portion 26 extending downward from the engaging portion 25.

The stack part 26 is configured such that when the tableware 1 is stacked, the lower plate 10 located above (for example, see tableware 1a and 1b shown in FIG. This serves to prevent the tableware 1b, 1c) from coming into contact with the upper plate 20. This stack portion 26 includes a main body portion 27 connected to the engaging portion 25 and a tip portion 28 connected to the main body portion 27. Of these, the main body portion 27 is inclined radially outward as it goes downward. The distal end portion 28 extends radially outward from the distal end of the main body portion 27 along the horizontal direction. The tip portion 28 may be recessed inward in the radial direction from the outermost surface of the engaging portion 25 in the radial direction. Thereby, when the tableware 1 is used, transported, stored, etc., the tip portion 28 can be prevented from interfering with structures around the tableware 1. Therefore, the tableware 1 can be easily handled.

As shown in FIG. 6, the lower end 26a of the stack portion 26 is located between the lower surface 13a of the first flange portion 13 of the lower plate 10 and the lower surface 12a of the first bottom portion 12 in the vertical direction. As a result, when the tableware 1 is placed on the ground plane S, the lower surface 12a of the first bottom part 12 comes into contact with the ground plane S, and a gap G1 is formed between the lower end 26a of the stack part 26 and the ground plane S. be done. Therefore, the stability of the tableware 1 can be improved when the tableware 1 is grounded.

Such a stack portion 26 is formed over the entire circumference. As a result, when the tableware 1 is stacked, the lower plate 10 of the upper tableware (for example, tableware 1a, 1b shown in FIG. 7) is replaced by the lower tableware 10 (for example, tableware 1b shown in FIG. 7). , 1c) can be effectively prevented from coming into contact with the upper plate 20. Note that the stack portion 26 may be formed only in a portion in the circumferential direction.

Further, a protruding portion 29 that protrudes upward is formed on the second flange portion 23 . This protrusion 29 serves to improve the stability of the tableware 1 when the tableware 1 is stacked on top of each other. That is, when the tableware 1 is stacked, the protruding portion 29 of the tableware located below (for example, tableware 1b, 1c shown in FIG. 7) is the same as that of the tableware located above (for example, tableware 1a, 1c shown in FIG. 7). 1b) from the inside in the radial direction. Therefore, the stability of the tableware 1a, 1b located above can be improved. This protrusion 29 is formed over the entire circumference. Thereby, when the tableware 1 is stacked on top of each other, the stability of the tableware 1a, 1b located above the tableware 1b, 1c can be further improved. Note that the protruding portion 29 may be formed only in a portion in the circumferential direction.

The height H1 (see FIG. 6) of such a protruding portion 29 may be lower than the height H2 (see FIG. 6) from the lower surface 13a of the first flange portion 13 to the lower end 26a of the stack portion 26. Thereby, when the tableware 1 is stacked on top of each other, the protruding portions 29 of the tableware 1b, 1c located below can be prevented from contacting the lower surfaces of the first flange portions 13 of the tableware 1a, 1b located above.

Here, as shown in FIG. 7, a plurality of tableware 1 may be stored in a stack. In the illustrated example, three tableware 1a, 1b, and 1c are stacked vertically. Note that the number of tableware 1 stacked in the vertical direction is not limited to this, and may be two, or four or more. In this modification, a tableware assembly 1A including a plurality of such tableware 1 is also provided.

In this modification, when a plurality of tableware 1 are stacked and stored, the tip part 28 of the stack part 26 of the tableware 1a, 1b (one tableware) is located below the tableware 1a, 1b (one tableware). (other tableware). Thereby, gaps G2 and G3 are formed between the lower plate 10 of the tableware 1a, 1b and the upper plate 20 of the tableware 1b, 1c. Therefore, the lower plate 10 of the tableware 1a, 1b can be prevented from contacting the surface 30a of the upper plate 20 of the tableware 1b, 1c. In other words, it is possible to prevent the lower tray 10 containing the recycled material from coming into contact with the surface on which food is placed (the surface 30a of the upper tray 20). Therefore, even when a plurality of tableware 1 are stored in a stack, the hygiene of tableware 1 can be maintained.

Moreover, in this case, the protruding parts 29 of the tableware 1b, 1c engage with the stack part 26 of the tableware 1a, 1b from the radially inner side. Thereby, movement of the tableware 1a, 1b in the radial direction with respect to the tableware 1b, 1c is suppressed. Therefore, it is possible to prevent tableware 1a, 1b from being unintentionally removed from tableware 1b, 1c.

As described above, in this modification, a tableware assembly 1A including a plurality of such tableware 1 is also provided. That is, in this modification, the stack portion 26 of the tableware 1a, 1b (one tableware) is in contact with the second flange portion 23 of the tableware 1b, 1c (other tableware) located below the tableware 1a, 1b, A tableware assembly 1A is also provided in which gaps G2 and G3 are formed between a lower plate 10 of 1a and 1b and an upper plate 20 of tableware 1b and 1c.

According to this modification, the upper plate 20 further includes a stack part 26 extending downward from the engaging part 25. Thereby, as shown in FIG. 7, when the tableware 1 is stacked on top of each other, it is possible to prevent the lower plate 10 of the tableware 1 located above from coming into contact with the upper plate 20 of the tableware 1 located below. Therefore, even when a plurality of tableware 1 are stored in a stack, the hygiene of tableware 1 can be maintained.

Further, according to this modification, the lower end 26a of the stack portion 26 is located between the lower surface 13a of the first flange portion 13 of the lower plate 10 and the lower surface 12a of the first bottom portion 12 in the vertical direction. . Thereby, the stability of the tableware 1 can be improved when the tableware 1 is grounded.

Further, according to this modification, a protrusion 29 that protrudes upward is formed on the second flange portion 23 . Thereby, when the tableware 1 is stacked on top of each other, the stability of the tableware 1a, 1b located above the tableware 1b, 1c can be further improved. Therefore, it is possible to prevent tableware 1a, 1b from being unintentionally removed from tableware 1b, 1c.

It is also possible to appropriately combine the plurality of components disclosed in the above embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

1 tableware 10 lower plate 11 first side part 12 first bottom part 12a lower surface 13 first flange part 13a lower surface 15 through hole 20 upper plate 21 second side part 22 second bottom part 23 second flange part 25 engaging part 26 stack part 26a lower end 29 protrusion 30a front surface 30b back surface 31 first layer 32 second layer 33 third layer

Claims (12)

A lower plate and
and an upper plate superimposed on the lower plate,
The upper plate includes virgin material,
The lower plate is a tableware containing recycled materials. The tableware according to claim 1, wherein the upper plate is detachably attached to the lower plate. The tableware according to claim 1, wherein the upper plate is a sheet molded product, and the lower plate is an injection molded product. The lower plate has a first side, a first bottom connected to the first side, and a first flange provided around the first side, and the upper plate includes: a second side portion, a second bottom portion connected to the second side portion, and a second flange portion provided around the second side portion; The tableware according to claim 1, further comprising an engaging portion that engages with the flange portion. The tableware according to claim 4, wherein the upper plate further includes a stack portion extending downward from the engaging portion. The tableware according to claim 5, wherein a lower end of the stack portion is located between a lower surface of the first flange portion and a lower surface of the first bottom portion in the vertical direction. The tableware according to claim 5, wherein the second flange portion is formed with a protrusion that protrudes upward. The tableware according to claim 1, wherein the upper plate is made of virgin material. The tableware according to claim 8, wherein the upper plate is made of virgin material containing biomass-derived resin. The upper plate has a first layer constituting a front surface, a second layer constituting a back surface, and a third layer provided between the first layer and the second layer. The tableware according to claim 1, wherein the layer and the second layer are made of virgin material, and the third layer includes a recycled material or a biomass-derived resin. The tableware according to claim 1, wherein the lower plate has a through hole formed therein. collecting at least the upper plate of a tableware comprising a lower plate and an upper plate stacked on the lower plate;
A recycling method comprising the step of producing the lower plate from the collected upper plate.

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