JP5213593B2 - Chopping board and manufacturing method thereof - Google Patents

Description

  The present invention relates to a resin cutting board, and more particularly to a colored cutting board using a multicolored resin material and a manufacturing method thereof.

  Conventional resin cutting boards are generally based on white. The white appearance has a sense of cleanliness and is easy for users to understand.

  On the other hand, recently, a resin cutting board based on black has been attracting attention. The black cutting board not only has a novel appearance, but also is easy to use because white foods such as tofu and root vegetables are easy to see. In particular, it is also used by visually impaired persons such as cataracts and color weakness and elderly people with weak vision.

  In addition, patent documents 1-3 etc. are disclosed as a prior art regarding a colored cutting board.

Japanese Utility Model Publication No. 7-9240 Utility Model Registration No. 3134737 Japanese Patent Laid-Open No. 2003-210341

  However, such a conventional black chopping board is useful for cooking white foods, but when processing dark foods such as meat and green vegetables, the black color may be obstructive and difficult to see. A white and black cutting board may be prepared in advance and used separately for each food. However, it takes time to secure a storage place and to clean after use.

  On the other hand, it is conceivable that the front and back surfaces of the cutting board are color-coded into white and black, respectively, so that the reversible. In such a configuration, the above-mentioned problems can be solved by properly using the front and back of one cutting board according to the color of the food.

However, such a reversible type cutting board has a new problem in terms of manufacturing cost. That is, in the conventional single color cutting board, the color change does not occur even if the cut material generated in the manufacturing process is returned to the raw material and used, so that the resin of the cut material can be reused without any problem. However, in the two-color cutting board of black and white, when the cut material is returned to the raw material, the colors of the resin change and the color of the resin changes, making it difficult to return to the original color. For this reason, the resin of the end piece cannot be reused and must be discarded.
As a countermeasure for the above, it is conceivable to separate the resin material of the end material into a white part and a black part and mix it with the raw materials of each color, but such a resin separation work takes time and results in manufacturing costs. It will be bulky.

  The present invention has been made in view of such a current situation, and a cutting board that can be used reversibly with white and black cooking surfaces and that can be easily recycled as a resin raw material from a cut piece produced in the manufacturing process. It is intended to provide.

[First invention]
The cutting board of the first invention for solving the above-mentioned problems is
A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
In addition, the first surface layer is white, the second surface layer is black, and the intermediate layer is arranged in a mixed color of white of the first surface layer and black of the second surface layer.

  According to the cutting board of the first invention, white and black cooking surfaces are formed on the first surface layer and the second surface layer, respectively, so that these cooking surfaces can be used reversibly. For this reason, it is not necessary to prepare the cutting board from which a color differs for every foodstuff separately.

In the present invention, since the mixed color of the first surface layer (white) and the second surface layer (black) is adopted as the intermediate layer of the cutting board, the cut material generated in the manufacturing process is mixed with the resin raw material of the intermediate layer. However, the color change is small and it can be easily restored to the original color. For this reason, the cut off material can be easily recycled, and the resin raw material can be effectively used.
That is, when a cutting board is manufactured only with two-color resin materials of black and white, there is a problem in terms of material cost as described above. However, in the present invention, the first surface layer (white) and the second surface layer (black) are used as the intermediate layer. By adopting the mixed color, it was possible to reuse the cut material as a raw material for the intermediate layer, and solved the above problem. Generally, as the color of the resin increases, the manufacturing cost increases. However, in the present invention, even if the color of the resin increases, the manufacturing cost can be conversely reduced by effectively using the resin raw material.

  Furthermore, according to the present invention, since the intermediate layer is a gray color which is a mixed color of the first surface layer and the second surface layer, each layer appears as a gradation on the appearance of the cutting board. As a result, it is possible to realize a cutting board with high design that is rich in color change, compared to a cutting board that is simply color-coded in black and white.

  In the first invention, the color of each layer can be adjusted by mixing an appropriate amount of a black or white colorant with the resin raw material. About white, you may employ | adopt as it is, without coloring the resin raw material.

In the first invention, if the first surface layer or the second surface layer can be discriminated as white or black at a glance, the color density (lightness) is not particular. For example, the first surface layer can be set to a light gray color close to white, the second surface layer can be set to a dark gray color close to black, and the intermediate layer can be set to a mixed gray color.
Alternatively, a small amount of a chromatic colorant may be added to the resin material of each layer to add color to each layer.

  In the cutting board of the first invention, the color of the intermediate layer is substantially the same as the resin material obtained by mixing the resin raw material of the first surface layer and the resin raw material of the second surface layer in a layer thickness ratio of both layers. It is desirable to set to the color.

  In the first invention, when the cut end material is reused as the resin material of the intermediate layer, if the thicknesses of the first surface layer and the second surface layer are different, the mixed color of the intermediate layer approaches the color of the thick layer. It is assumed that it changes as follows. Such a color change can be restored to the original color relatively easily by adding a thin layer of colorant, but the color of the intermediate layer may vary depending on the amount of colorant added. There is.

  As described above, the color of the intermediate layer is set in advance to approximately the same color as the resin material obtained by mixing the resin material of the first surface layer and the resin material of the second surface layer at the layer thickness ratio of both layers. In this case, when the end cut material is mixed with the resin material of the intermediate layer, the first surface layer and the second surface layer are mixed and become almost the same color as the intermediate layer. As a result, it is easy to keep the color of the intermediate layer almost constant without adding a colorant, and the quality (hue) of the cutting board can be stabilized.

It is effective to apply multicolor extrusion molding to the cutting board manufacturing method of the first invention.
That is, the manufacturing method of the cutting board of the first invention is:
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
It is desirable to include a step of mixing the cut material generated in the extrusion step or the finishing step with the resin raw material of the intermediate layer.

According to such a manufacturing method, the laminated structure of the first surface layer, the second surface layer, and the intermediate layer can be reliably molded without using an adhesive or the like in the same mold, and the efficiency is reduced with fewer steps. The cutting board of the first invention can be manufactured well.
In addition, the cut material generated in the manufacturing process can be easily reused as a resin material for the intermediate layer without waste, and the raw material can be effectively used. The “finishing process” of the present invention includes a cutting process and other processes such as surface processing of a cutting board.

[Second invention]
In the first invention, the first surface layer is white and the second surface layer is black. However, the colors of the first surface layer and the second surface layer are not necessarily limited to these, and colors other than white or black are used. Can also be adopted. One or both of the first surface layer and the second surface layer may be chromatic colors such as red, blue, and green. For example, the first surface layer is white, the second surface layer is red, and the intermediate layer is a mixed color (pink). The first surface layer is blue, the second surface layer is black, and the intermediate layer is a mixture thereof. It is also possible to adopt a configuration in which the color (dark blue) is used, a configuration in which the first surface layer is blue, the second surface layer is red, and the intermediate layer is a mixed color (purple).

That is, the cutting board of the second invention is
A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
In addition, the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and the color of the intermediate layer is a mixed color of the color of the first surface layer and the color of the second surface layer. The configuration is as follows.

According to such a structure, the cooking surface of a 1st surface layer and a 2nd surface layer can be used reversibly similarly to 1st invention.
Further, since the mixed color of the first surface layer and the second surface layer is adopted as the color of the intermediate layer of the cutting board, the cut material generated in the manufacturing process can be easily reused as the resin material of the intermediate layer. . Since the intermediate layer containing the recycled material can be seen only on the side surface of the cutting board but not on the front and back surfaces, even if the color of the intermediate layer is not preferred as the appearance of the cutting board, the influence is reduced.
Furthermore, since the appearance of each layer appears as a gradation, the design of the cutting board can be improved.

  In the second invention, the color of the intermediate layer is substantially the same as the resin material obtained by mixing the resin raw material of the first surface layer and the resin raw material of the second surface layer in a layer thickness ratio of both layers. It is desirable to be set to.

  According to such a configuration, as described above, even if the end cut material is mixed with the resin material of the intermediate layer, the color of the intermediate layer can be easily kept substantially constant, and the quality (hue) of the cutting board can be stabilized.

As a method for producing a cutting board according to the second invention, the following multicolor extrusion molding is effective.
That is, the manufacturing method of the cutting board of the second invention is:
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
It was set as the structure including the process of mixing the cut material produced in the said extrusion process or the said finishing process with the resin raw material of the said intermediate | middle layer.

According to such a manufacturing method, the laminated structure of the first surface layer, the second surface layer, and the intermediate layer can be easily formed with a single mold, and the cutting board of the second invention can be efficiently produced with fewer steps. Can be manufactured.
Further, the cut off material generated in the manufacturing process can be easily reused without waste as the resin material for the intermediate layer, and the manufacturing cost can be saved.

[Third invention]
In the second invention, the mixed color of the first surface layer and the second surface layer is adopted as the intermediate layer. However, the mixed color layer does not necessarily have to be the intermediate layer. It can also be employed for the surface layer.
That is, the cutting board of the third invention is
A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
In addition, the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and any one of the first surface layer, the second surface layer, and the intermediate layer is a color of the other layer. The composition is a mixed color.

Even in such a configuration, the cooking surfaces of the first surface layer and the second surface layer are different in color, so that each surface can be used reversibly.
In addition, since the mixed color of the other layer is adopted for any one of the first surface layer, the second surface layer, and the intermediate layer, the cut material generated in the manufacturing process can be easily reused as the resin material of the mixed color. can do.

  In the third invention, it is desirable that the color of the one layer is set to be substantially the same color as a resin material obtained by mixing the resin raw materials of the other layers at a layer thickness ratio of each layer.

  According to such a configuration, even when a piece of cut material is mixed with the one-layer resin material, it is easy to keep the color of the mixed color almost constant, and the quality (hue) of the cutting board can be stabilized.

As the method for producing a cutting board according to the third invention, the following multicolor extrusion molding is effective.
That is, the manufacturing method of the cutting board of the third invention is:
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
It was set as the structure including the process of mixing the cut material produced in the said extrusion process or the said finishing process with the said one-layer resin raw material.

According to such a manufacturing method, the laminated structure of the first surface layer, the second surface layer, and the intermediate layer can be easily formed with a single mold, and the cutting board of the third invention can be efficiently produced with fewer steps. Can be manufactured.
Further, the cut material generated in the manufacturing process can be easily reused without waste as the resin material of the mixed color layer, and the manufacturing cost can be saved.

[Fourth Invention]
In the third invention, each layer may be colored so that the mixed color layer is black and the other layers are chromatic colors not including white.
That is, the cutting board of the fourth invention is
A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
And the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and any one of the first surface layer, the second surface layer, and the intermediate layer is black, The other layers are chromatic colors that do not contain white.

According to such a structure, since the color of the cooking surface of a 1st surface layer and a 2nd surface layer differs, each surface can be used reversibly.
In addition, since any one of the first surface layer, the second surface layer, and the intermediate layer is black and the other layers are chromatic colors that do not include white, the edge material is mixed with the resin material of the black layer. It can be recolored to black relatively easily. For this reason, it is possible to effectively reuse the cut material as a resin material for the cutting board.

As a method for producing a cutting board of the fourth invention, the following multicolor extrusion molding is effective.
That is, the manufacturing method of the cutting board of 4th invention is as follows.
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
The cutting material generated in the extrusion process or the finishing process is mixed with the one-layer resin material and colored in black.

According to such a manufacturing method, the laminated structure of the first surface layer, the second surface layer, and the intermediate layer can be easily formed with a single mold, and the cutting board of the fourth invention can be efficiently produced with a small number of steps. Can be manufactured.
Further, the cut material generated in the manufacturing process can be easily reused without waste as the resin material for the black layer, and the manufacturing cost can be saved.

[First to Fourth Inventions]
In the present invention (first to fourth inventions), the use of the cutting board is not limited, and it may be for home use or for business use.
For example, polyethylene, polypropylene, or the like may be used as the resin material. By adopting the same resin as the resin material for each layer, it is possible to easily reuse the cut-off material and defective products as the resin material for the intermediate layer.
The thicknesses of the first surface layer and the second surface layer are desirably sufficiently thinner than the intermediate layer. By setting in this way, it becomes easy to mix a large amount of the cut material into the intermediate layer, and a functional material such as an antibacterial agent can be intensively mixed into the first surface layer and the second surface layer.
In the present invention (first to fourth inventions), the “finishing step” includes a cutting step and other steps such as surface processing necessary for manufacturing a cutting board.
In the present invention (first to fourth inventions), the intermediate layer may be a plurality of layers. When the intermediate layer is formed into a plurality of layers, the appearance of the cutting board can be kept beautiful by stacking so that gradation appears in each layer.
Moreover, in the manufacturing method of the cutting board by this invention (1st-4th invention), it is desirable to grind | pulverize and use a cut material before mixing in the process of mixing a cut material with the resin raw material of an intermediate | middle layer. This is because unevenness is less likely to occur in the molten state of the resin raw material by preliminarily crushing the end cut material.

  As a manufacturing method of the cutting board of this invention (1st-4th invention), you may use another manufacturing method, without being limited to multicolor extrusion molding. For example, in the manufacturing method by injection molding, the plate-shaped bodies of the first surface layer, the second surface layer, and the intermediate layer are molded with separate dies, and these are bonded together to obtain a cutting board. Even in the case of such a manufacturing method, the end cut material can be recycled as a mixed color or black resin material, and the resin material can be effectively used.

In the present invention (first to fourth inventions), defective products generated in the manufacturing process, recovered items such as unsold products and used items may be applied in place of the cut off material. By reusing such defective / collected resin, it is possible to effectively use resources and contribute to environmental measures.
As a method of reusing defective / collected products, for example, surface dirt and deteriorated parts (preferably the entire six surfaces including the front and back and side surfaces) are cut, then pulverized through a cleaning process, and mixed with the resin raw material. . As a measure against discoloration or deterioration, coloring may be performed by blending new raw materials.
The present invention (first to fourth inventions) may be applied alone or in combination. These inventions may be combined with other inventions described in this specification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The cutting board of 1st Embodiment was shown in FIGS. 1-3. As shown in FIG. 1, the cutting board 10 is formed by laminating resins such as polyethylene and polypropylene, and the front and back surfaces of a rectangular plate 12 are used as cooking surfaces. A handle hole 13 passes through an end of the cutting board 10 in the longitudinal direction. The corners of the four corners of the plate body 12 are chamfered in an arc shape.
Although not shown, the chamfering of the outer peripheral ends of the front and back surfaces of the plate 12 and the edge of the handle hole 13 is also given. These chamfers make it easy to grasp the cutting board 10 by hand.

  In the thickness direction of the cutting board 10, a first surface layer L1 is provided on the upper side in FIG. 1, a second surface layer L2 is provided on the lower side, and an intermediate layer L3 is provided between the first surface layer L1 and the second surface layer L2. Yes. The colors of the respective layers are arranged in different colors. The first surface layer L1 is white, the second surface layer L2 is black, and the intermediate layer L3 is a mixed color (gray color) of both layers. Although one color of white or black is visible on the cooking surface of the cutting board 10, each layer appears to be three colors on the side surface in the thickness direction.

  The thickness (layer thickness) of the first surface layer L1, the second surface layer L2, and the intermediate layer L3 is constant in the plate surface direction. The thickness of the intermediate layer L3 is sufficiently larger than the thicknesses of the first surface layer L1 and the second surface layer L2. In this way, by increasing the thickness of the intermediate layer L3, cut off materials and defective products generated in the cutting board 10 manufacturing process, and uncollected and used items (hereinafter referred to as cut off materials) of the intermediate layer L3 are used. It is easy to use as a resin raw material.

The mixed color of the intermediate layer L3 is set to the same color as that of the resin material obtained by mixing the resin raw material of the first surface layer L1 and the resin raw material of the second surface layer L2 at the layer thickness ratio of both layers. Is desirable. For example, when the layer thickness ratio between the first surface layer L1 and the second surface layer L2 is equal, the color of the resin obtained by uniformly mixing the resin raw materials of both layers is the color of the intermediate layer L3. When the first surface layer L1 is twice as thick as the second surface layer L2, the resin raw material of the first surface layer L1 and the resin raw material of the second surface layer L2 are each in a 2: 1 mixing ratio. Let the color of the resin obtained be the color of the intermediate layer L3.
Thus, by selecting the mixed color of the intermediate layer L3 based on the layer thickness ratio of the first surface layer L1 and the second surface layer L2, the cutting material of the cutting board 10 is mixed with the resin raw material of the intermediate layer L3. However, the hue of the intermediate layer L3 hardly changes.

When using the cutting board 10 and handling dark-colored ingredients such as meat and green vegetables, the cooking surface of the first surface layer L1 (white) is used, so that the outline of the ingredients can be clearly seen on the white background. It becomes easy. On the other hand, when handling light white foodstuffs such as tofu and root vegetables, turning the cutting board 10 over and using the cooking surface of the second surface layer L2 (black) allows the outline of the white food ingredients to be clearly seen on the black background. Is easier to do.
In this way, the cutting board 10 can be used in a reversible manner as necessary, so that there is no need to prepare two cutting boards for each food.

  Moreover, according to the cutting board 10, since the gradation of white, a gray color, and black appears on the side surface of the thickness direction including the handle hole 13, there also exists an effect which gives an accent to a kitchen beautifully also in appearance.

  Furthermore, according to the configuration of the cutting board 10, since the mixed color of the white color of the first surface layer L1 and the black color of the second surface layer L2 is adopted for the intermediate layer L3, the cutting material of the cutting board 10 is used as the intermediate layer L3. Even if it adds to a raw material, the hue of the intermediate | middle layer L3 is hardly changed with the gray color. For this reason, it is possible to easily reuse the cut material or the like as a raw material for the intermediate layer L3.

  A specific example of manufacturing the cutting board 10 is shown in FIG. The cutting board 10 can be manufactured by three-color extrusion molding. In the manufacturing apparatus of FIG. 4, reference numeral 15 denotes an extruder, reference numeral 16 denotes a cooler, reference numeral 17 denotes a drawer, reference numeral 18 denotes a cutting machine, and reference numeral 14 denotes a mold for extruding a plate-like body from the extruder 15. (Die).

The extruder 15 is provided with three kinds of raw material charging parts 15a to 15c. The raw material input part 15a is supplied with the raw material of the first surface layer L1, the raw material input part 15b is supplied with the raw material of the second surface layer L2, and the raw material input part 15c is supplied with the raw material of the intermediate layer L3.
Each raw material is color-adjusted by mixing an appropriate amount of coloring material. As a result, the first surface layer L1 is white, the second surface layer L2 is black, and the intermediate layer L3 is gray.

  When the resin raw material is charged into the raw material charging portions 15 a to 15 c of the extruder 15, the raw material heated and melted in the mold 14 is layered and welded, and is extruded as a three-layer plate in front of the mold 14. The extruded plate-like body moves to the drawer 17 side through the cooler 16, is cut by the cutting machine 18, is subjected to surface treatment, and becomes the cutting board 10.

  Here, the end cut material 19 cut by the cutting machine 18 is finely pulverized and then returned to the raw material charging portion 15c of the intermediate layer L3. The end cut material 19 includes black and white resins, but these are melt-mixed to become a gray color, so that the color of the intermediate layer L3 is hardly affected. Similarly, the color of the intermediate layer L3 hardly changes even if it is returned to the raw material of the intermediate layer L3 for defective products generated during the manufacturing process, or uncollected items such as unsold products and used products.

According to such a manufacturing method, it is possible to efficiently make the cutting board 10 having a three-layer structure by using resin materials having three different colors in a few steps.
Further, the cut end material can be easily reused as the resin material of the intermediate layer L3, and the manufacturing cost can be greatly reduced.

Next, the cutting board 20 of 2nd Embodiment was shown in FIG.5 and FIG.6.
The cutting board 20 is made of polyethylene, polypropylene, or the like, and the front and back surfaces of the rectangular plate body 22 are used as cooking surfaces. At both ends in the longitudinal direction, left and right are alternately provided with arc-shaped cutouts in the longitudinal section, and handle parts 23 and 24 are formed by these cutouts.

  5 and 6, in the thickness direction of the cutting board 20, a first surface layer L1 is provided on the upper side, a second surface layer L2 is provided on the lower side, and an intermediate layer L3 is provided between both layers L1 and L2. The first surface layer L1 is white, the second surface layer L2 is black, and the intermediate layer L3 is arranged in a mixed color (gray color) of both layers L1 and L2.

Also by the cutting board 20 of 2nd Embodiment, since the monochrome reversible cooking surface is formed in the 1st surface layer L1 and the 2nd surface layer L2, it can be used properly for every foodstuff.
Further, since the mixed color of the first surface layer L1 and the second surface layer L2 is adopted for the intermediate layer L3, the end cutting material of the cutting board 20 can be easily reused as the raw material of the intermediate layer L3.
Furthermore, since the color of each layer appears on the side surface in the thickness direction of the plate body 22, the design of the cutting board can be improved.
Furthermore, the cutting board 20 can be easily turned over by putting fingers on the grip portions 23 and 24 of the cutting board 20, and the reversible cooking surface can be used more comfortably.

The cutting board 30 of 3rd Embodiment was shown to FIG. 7 and FIG.
The cutting board 30 employs a mixed color for the first surface layer L1. As shown in FIGS. 7 and 8, cooking surfaces are formed on the front and back of the rectangular plate 32. In the thickness direction of the cutting board 30, a first surface layer L1 is provided on the upper side, a second surface layer L2 is provided on the lower side, and an intermediate layer L3 is provided between both layers L1 and L2. The second surface layer L2 is black, the intermediate layer L3 is white, and the first surface layer L1 is arranged in a mixed color (gray color) of both layers L2 and L3.

  The thickness (layer thickness) of the first surface layer L1, the second surface layer L2, and the intermediate layer L3 is constant in the plate surface direction. Each layer L1, L2, L3 is set to have an equal thickness. Since the thickness of the first surface layer L1 is ensured to be larger than that in the first and second embodiments described above, it is easy to use the cut material of the cutting board 30 as a resin raw material for the first surface layer L1. .

In the cutting board 30 of 3rd Embodiment, since the gray color and black appear on the 1st surface layer L1 and the 2nd surface layer L2, respectively, these cooking surfaces can be used reversibly for every foodstuff.
In addition, since the mixed color of the second surface layer L2 and the intermediate layer L3 is adopted for the first surface layer L1, it is possible to easily reuse the cut-off material or the like as a raw material for the first surface layer L1.

Although 1st-3rd embodiment was described, embodiment of this invention may be accompanied by various changes, without being limited to these.
For example, different chromatic colors such as red, blue, green, yellow, etc. are adopted for any two of the first surface layer L1, the second surface layer L2, and the intermediate layer L3, and the remaining one layer is a mixed color of the other layers. May be adopted. Further, any two of the first surface layer L1, the second surface layer L2, and the intermediate layer L3 may be a chromatic color that does not include white, and the remaining one layer may be black. According to such a structure, the cutting material of a cutting board etc. can be easily reused as a resin raw material of a mixed color or black layer.
The first surface layer L1, the second surface layer L2, and the intermediate layer L3 may be colored by adding a small amount of a colorant such as red, blue, green, or yellow. According to such a configuration, a pastel gradation can be given to each layer, and a high-quality cutting board can be obtained.

In addition, the first surface layer L1 and the second surface layer L2 can contain a functional material such as an antibacterial agent.
As a method of mixing the cut end material or the like with the resin raw material of the intermediate layer, in addition to adding a granular or powdered material, a material cut into an appropriate size by a cutting machine may be added.

The cutting board by 1st Embodiment of this invention is shown, and it is the perspective view seen from the 1st surface layer side. The cutting board by 1st Embodiment of this invention is shown, and it is the perspective view seen from the 2nd surface layer side. It is a partial side view which shows the cutting board by 1st Embodiment of this invention. It is a schematic block diagram which shows the manufacturing apparatus of the cutting board by 1st Embodiment of this invention. The cutting board by 2nd Embodiment of this invention is shown, and it is the perspective view seen from the 1st surface layer side. It is a partially cutaway side view which shows the cutting board by 2nd Embodiment of this invention. The cutting board by 3rd Embodiment of this invention is shown, and it is the perspective view seen from the 1st surface layer side. It is a partially cutaway side view which shows the cutting board by 3rd Embodiment of this invention.

Explanation of symbols

10 Cutting board (first embodiment)
12 Plate 13 Handle hole 14 Mold (die)
15 Extruder 16 Cooling Machine 17 Drawer 18 Cutting Machine 19 Cutting Material 20 Cutting Board (Second Embodiment)
22 Plate bodies 23 and 24 Handle 30 Cutting board (third embodiment)
32 Plate 33 Handle hole L1 First surface layer L2 Second surface layer L3 Intermediate layer

Claims (12)

A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
The first surface layer is white, the second surface layer is black, and the intermediate layer is colored in a mixed color of white of the first surface layer and black of the second surface layer. Cutting board.   2. The cutting board according to claim 1, wherein the color of the intermediate layer is obtained by mixing the resin raw material of the first surface layer and the resin raw material of the second surface layer in a layer thickness ratio of both layers. A cutting board that is set to almost the same color. A method for producing a cutting board according to claim 1 or 2,
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
A method for manufacturing a cutting board, comprising a step of mixing a cut material generated in the extrusion step or the finishing step with a resin raw material of the intermediate layer. A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
In addition, the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and the color of the intermediate layer is a mixed color of the color of the first surface layer and the color of the second surface layer. A cutting board characterized by   5. The cutting board according to claim 4, wherein the color of the intermediate layer is obtained by mixing the resin raw material of the first surface layer and the resin raw material of the second surface layer in a layer thickness ratio of both layers. A cutting board that is set to almost the same color. It is a manufacturing method of the cutting board of Claim 4 or 5,
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
A method for manufacturing a cutting board, comprising a step of mixing a cut material generated in the extrusion step or the finishing step with a resin raw material of the intermediate layer. A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
In addition, the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and any one of the first surface layer, the second surface layer, and the intermediate layer is a color of the other layer. A chopping board characterized by having a mixed color.   8. The cutting board according to claim 7, wherein the color of the one layer is set to substantially the same color as a resin material obtained by mixing the resin raw materials of the other layers at a layer thickness ratio of each layer. A method for producing a cutting board according to claim 7 or 8,
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
A method for manufacturing a cutting board, comprising a step of mixing a piece of cut material generated in the extrusion step or the finishing step with the one-layer resin raw material. A first surface layer;
A second surface layer provided on the opposite side of the first surface layer;
A resin cutting board having a laminated structure including an intermediate layer provided between the first surface layer and the second surface layer,
The first surface layer, the second surface layer, and the intermediate layer are made of the same resin material,
And the first surface layer, the second surface layer, and the intermediate layer are arranged in different colors, and any one of the first surface layer, the second surface layer, and the intermediate layer is black, A cutting board characterized in that the other layer is a chromatic color not containing white. It is a manufacturing method of the cutting board of Claim 10, Comprising:
Introducing the resin material of the first surface layer into an extruder;
Introducing the resin material of the second surface layer into an extruder;
Introducing the resin material of the intermediate layer into an extruder;
Extruding a plate-like body on which the first surface layer, the second surface layer and the intermediate layer are laminated from a mold of the extruder,
Cutting the plate-like body into a predetermined shape to finish a cutting board;
A method for producing a cutting board, comprising a step of mixing a piece of cut material generated in the extrusion step or the finishing step with the one layer of resin raw material and coloring it black.   It is a manufacturing method of the cutting board of Claim 3, 6, 9 or 11, Comprising: It replaces with the said cut piece material, and uses the inferior goods produced in the manufacturing process of the said cutting board, or collection goods, such as unsold goods and used, Production method.

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