Laminated pulp container for rice and method for manufacturing a laminated pulp container for rice

Abstract

To reduce the risk of destroying rice when taking out rice from a storage recessed part of a container.SOLUTION: A container body 14 includes a plurality of body side pulp protrusion parts 44 protruding toward a storage recess part 12. A body side laminate film 50 includes a plurality of body side laminate protrusion parts 52 having a shape following a surface shape of the body side pulp protrusion part 44. The body side laminate protrusion part 52 is provided so that rice comes into contact only on an apex side. Opening width of a groove 54 existing between adjacent body side laminate protrusion parts 52 is smaller than maximum width orthogonal to the longer direction of the rice.SELECTED DRAWING: Figure 2

Description

Technical Field

[0003]

[0001] The present invention relates to a laminated pulp container for cooked rice and a method for manufacturing the laminated pulp container for cooked rice.

Background Art

[0002] A laminated pulp container having a container body made of pulp mold including a storage recess for storing foods and the like, and a laminated film bonded to the surface of the storage recess of the container body is known (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the contents stored in the storage recess of the laminated pulp container are cooked rice (cooked rice), it is preferable for the cooked rice to look good and be deliciously eaten that the rice grains do not adhere to the surface of the storage recess, the rice grains are easily peeled off from the surface of the storage recess, and the cooked rice can be taken out of the storage recess without breaking the rice grains.

[0005] On the other hand, the conventionally known laminated pulp container does not have sufficient performance, the rice grains are difficult to peel off from the surface of the storage recess, and the rice grains are easily broken when the cooked rice is taken out of the storage recess.

[0006] The problem to be solved by the present invention is to provide a laminated pulp container specialized for cooked rice with less risk of breaking the rice when taking out the rice from the storage recess and a method for manufacturing the laminated pulp container.

Means for Solving the Problems

[0007] A laminated pulp container for cooked rice according to one embodiment of the present invention comprises a container body (14) made of pulp mold including a storage recess (12) for storing cooked rice, and a body-side laminate film (50) bonded to the surface of the storage recess, wherein the container body has a plurality of body-side pulp protrusions (44) projecting toward the storage recess, and the body-side laminate film has a plurality of body-side laminate protrusions (52) whose shape conforms to the surface shape of the body-side pulp protrusions, the body-side laminate protrusions are arranged so that the rice comes into contact with them only at the top, and the opening width (L1) of the groove (54) between adjacent body-side laminate protrusions is smaller than the maximum width (W) perpendicular to the longitudinal direction of the rice.

[0008] With this configuration, the contact area of ​​the rice grains with the surface of the storage recess, due to the laminate film on the main body, is reduced compared to when the surface of the storage recess is a smooth, flat surface. This makes it less likely for rice grains to stick to the surface of the storage recess, and also makes it less likely for rice to get into the grooves between the protrusions of the laminate on the main body. As a result, there is less risk of damaging the rice grains when removing the cooked rice from the storage recess.

[0009] In the above embodiment, more preferably, the multiple laminate protrusions on the main body side are arranged in a twill weave pattern.

[0010] This configuration makes it less likely for rice grains to adhere to the surface of the receiving recess.

[0011] In the above embodiment, more preferably, the twill weave pattern of the laminate protrusion on the main body side is arranged in a quadruple twill weave pattern.

[0012] This configuration makes it even more difficult for rice grains to adhere to the surface of the receiving recess.

[0013] In the above embodiment, more preferably, the opening width of the groove between the main body-side laminate protrusions is 0.18 mm or more and 0.20 mm or less, and the plurality of main body-side laminate protrusions are 50 mesh or more and 60 mesh or less.

[0014] This configuration makes it even more difficult for rice grains to adhere to the surface of the receiving recess.

[0015] In the above embodiment, more preferably, the container body has an opening (12A) that opens toward the upper part of the storage recess, and further comprises a lid (24) made of pulp mold that is foldable and connected to the container body to close the opening, and a lid-side laminate film (60) that is bonded to the surface of the lid that is located on the side of the storage recess when the lid is closed, the lid has a plurality of lid-side pulp protrusions (46) that project toward the storage recess on the surface that is located on the side of the storage recess when the opening is closed, the lid-side laminate film has a plurality of lid-side laminate protrusions (62) that are shaped to conform to the surface shape of the lid-side pulp protrusions, and the opening width of the groove (64) between adjacent lid-side laminate protrusions is such that it facilitates the trapping of water droplets on the surface of the lid-side laminate film.

[0016] This configuration promotes the trapping of water droplets on the surface of the laminate film on the lid side, and prevents water droplets from falling onto the rice contained in the storage recess.

[0017] In the above embodiment, more preferably, the multiple laminate protrusions on the lid side are arranged in a twill weave pattern.

[0018] This configuration promotes the trapping of water droplets on the surface of the laminate film on the lid side, and prevents water droplets from falling onto the cooked rice contained in the storage recess.

[0019] In the above embodiment, more preferably, the twill weave pattern of the laminate protrusion on the lid side is arranged in a quadruple twill weave pattern.

[0020] This configuration more effectively promotes the capture of water droplets on the surface of the laminate film on the lid side, and prevents water droplets from falling onto the rice contained in the storage recess.

[0021] In the above embodiment, more preferably, the width of the groove opening between the lid-side laminated protrusions is 0.18 mm or more and 0.20 mm or less, and the plurality of lid-side laminated protrusions are 50 mesh or more and 60 mesh or less.

[0022] According to this configuration, the capture of water droplets on the surface of the lid-side laminated film is further effectively promoted, and the falling of water droplets onto the cooked rice accommodated in the accommodation recess is suppressed.

[0023] A method for manufacturing a laminated pulp container for cooked rice according to an embodiment of the present invention is a method for manufacturing a laminated pulp container for cooked rice according to the above-described embodiment, and includes a molding step of molding the container body by a pulp mold, and a laminating step of laminating the main body-side laminated film on the surface of the accommodation recess of the container body molded by the molding step. The molding step is performed using a molding die device (100) that defines a container body molding chamber for supplying a pulp slurry and molding the container body, and a wire gauze (130) provided along at least the surface of the container body molding chamber on the side where the accommodation recess of the container body is molded among the surfaces where the molding die device defines the container body molding chamber. The main body-side pulp protrusions are molded by transferring the shape of the wire gauze in the molding step.

[0024] According to this method, in the molding step of molding the container body, the main body-side pulp protrusions are molded by transferring the shape of the wire gauze.

[0025] In the above embodiment, more preferably, the wire gauze is a twill weave.

[0026] According to this method, the wire gauze enables both appropriate papermaking and the molding of the main body-side pulp protrusions that make it difficult for rice grains to adhere to the surface of the accommodation recess.

[0027] In the above embodiment, more preferably, the scoop net is formed by a four - diamond weave in which one vertical wire passes over three horizontal wires and then passes over one horizontal wire.

[0028] According to this method, the scoop net enables both appropriate scooping and the formation of the main - body - side pulp protrusions that make it difficult for rice grains to adhere to the surface of the storage recess.

[0029] In the above embodiment, more preferably, the wire diameter of the vertical wire and the horizontal wire is 0.18 mm or more and 0.2 mm or less, and it is preferable for performing good scooping that the scoop net is 50 mesh or more and 60 mesh or less of this kind.

[0030] According to this method, the scoop net enables both appropriate scooping and the formation of the main - body - side pulp protrusions that make it difficult for rice grains to adhere to the surface of the storage recess.

Advantages of the Invention

[0031] According to the laminated pulp container for cooked rice of the present invention, when taking out the cooked rice from the storage recess, there is little risk of breaking the rice grains, and it is preferable for the cooked rice to be delicious and presentable for eating.

Brief Description of the Drawings

[0032] [Figure 1] Perspective view showing one embodiment of the laminated pulp container for cooked rice according to the present invention (perspective view before the laminate film is laminated) [Figure 2] Vertical cross - sectional view of the laminated pulp container for cooked rice according to the same embodiment [Figure 3] Enlarged view of the surface of the laminated pulp container for cooked rice according to the same embodiment [Figure 4] Cross - sectional view showing one embodiment of the molding device used in the manufacturing method of the laminated pulp container for cooked rice [Figure 5] Cross - sectional view showing one embodiment of the laminating device used in the manufacturing method of the laminated pulp container for cooked rice

Modes for Carrying Out the Invention

[0033] Below, with reference to the figures, one embodiment of the laminated pulp container for cooked rice according to the present invention and one embodiment of the method for manufacturing the same will be described.

[0034] As shown in Figures 1 and 2, the laminated pulp container 10 for cooked rice according to this embodiment has a container body 14 made of pulp mold that includes a storage recess 12 for storing cooked rice (cooked rice). The storage recess 12 is a roughly rectangular, deep recess that opens upward. The container body 14 has an opening 12A that opens upward towards the storage recess 12.

[0035] The container body 14 is integrally molded (molded) with a recess-forming portion 16 that defines the recess 12, a rectangular frame-shaped protrusion 18 that extends along the outer edge of the recess 12 of the recess-forming portion 16, and a rectangular frame-shaped flat flange portion 20 that extends outward from the protrusion 18.

[0036] A pulp molded lid 24 is connected to the container body 14 by a rectangular hinge piece 22 integrally molded along the flange portion 20 corresponding to one of the long sides of the housing recess 12. Perforations 23 are formed on the hinge piece 22.

[0037] The lid 24 is integrally molded (molded) with a shallow recess forming portion 28 that defines a roughly rectangular shallow recess 26, a rectangular frame-shaped recess portion 30 that extends along the outer edge of the shallow recess forming portion 28, and a rectangular frame-shaped flat flange portion 32 that extends outward from the recess portion 30.

[0038] The lid 24 is foldable and connected to the container body 14 via perforations 23 that form a fold line, in order to close the opening 12A in an openable and closable manner.

[0039] As shown in Figure 2, when the lid 24 is in the state where the opening 12A is closed (hereinafter referred to as the closed lid state), the recessed portion 30 fits into the convex portion 18 and the flange portion 32 makes surface contact with the flange portion 20, thereby creating a labyrinth seal effect and sealing the receiving recess 12.

[0040] The container body 14 has an extension piece 34 that extends outward from the flange portion 20, corresponding to the long side of the receiving recess forming portion 16 on the side of the flange portion 20 opposite to the hinge piece 22. The extension piece 34 has a bendable piece 40 formed by perforations 36 and slits 38.

[0041] The lid 24 has a shallow recess forming portion 28 on the side of the flange portion 32 opposite to the hinge piece 22, and an engaging piece 42 extending outward from the flange portion 32 corresponding to the long side of the receiving recess 12 integrally molded.

[0042] As shown in Figure 2, when the lid 24 is in the closed position, the engaging piece 42 is inserted into the slit 38, and the foldable piece 40 bends downward, locking into the extended piece 34 and maintaining the lid 24 in the closed position.

[0043] The container body 14 has a plurality of body-side pulp protrusions 44 (see enlarged view A in Figure 2) that protrude toward the storage recess 12.

[0044] The main body laminate film 50 is bonded to the surface of the receiving recess 12 formed by the receiving recess forming portion 16 of the container body 14, as well as to the surfaces of the protruding portion 18, flange portion 20, hinge piece 22, and extension piece 34 on the same side as the receiving recess, in a tightly bonded state by heat welding or the like, following the overall surface shape of these components. In other words, the main body laminate film 50 is bonded tightly to the entire surface of the container body 14 on the side facing the surface of the receiving recess 12.

[0045] Suitable resin films for the main body laminate film 50 include polypropylene film, polyethylene terephthalate film, polyethylene film, etc., with a thickness of approximately 100 to 200 μm.

[0046] The main body side laminate film 50 is bonded to the container body 14 in a tight-fitting state, and has multiple main body side laminate protrusions 52 (see enlarged view A in Figure 2) that conform to the surface shape of the main body side pulp protrusions 44.

[0047] The laminate protrusions 52 on the main body side are arranged in a twill weave pattern, more preferably in a four-ply twill weave pattern as shown in Figure 3, and each laminate protrusion 52 on the main body side is provided so as to come into contact with the cooked rice grains R at the top.

[0048] As a result, the contact area of ​​the rice grains R with the surface of the receiving recess 12 is reduced compared to when the surface of the receiving recess 12 is a smooth, flat surface, making it less likely for the rice grains R to adhere to the surface of the receiving recess 12. This reduces the risk of damaging the rice grains R when removing the cooked rice from the receiving recess 12.

[0049] A groove 54 exists between adjacent laminate protrusions 52 on the main body side. The opening width L1 (minimum width) of the groove 54 is smaller than the maximum width W in the direction perpendicular to the longitudinal direction of the cooked rice grain R. This makes it difficult for the rice grain R to enter the groove 54. This also makes it difficult for the rice grain R to adhere to the surface of the storage recess 12, and reduces the risk of damaging the rice grain R when removing the cooked rice from the storage recess 12.

[0050] The opening width L1 of the groove 54 is preferably half of the maximum width W to make it difficult for rice grains R to enter the groove 54, and may be 0.18 mm or more and 0.20 mm or less. Furthermore, the multiple main body-side laminate protrusions 52 may be 50 mesh or more and 60 mesh or less.

[0051] The lid 24 has a plurality of lid-side pulp protrusions 46 on the surface located on the side of the receiving recess 12 when the lid is closed, which protrude toward the receiving recess 12 when the lid is closed.

[0052] When the lid 24 is in the closed position, the lid-side laminate film 60 is bonded in close contact to the surface of the lid 24 that is located on the side of the receiving recess 12 by heat welding or the like. In other words, the lid-side laminate film 60 is bonded in close contact to the surface of the shallow recess 26 formed by the shallow recess forming portion 28 of the lid 24, and to the surfaces of the groove portion 30, flange portion 32, and engaging piece 42 on the same side as that surface, following the overall shape of these surfaces by heat welding or the like. That is, the lid-side laminate film 60 is bonded in close contact to the entire surface of the lid 24 on the side of the surface of the shallow recess 26.

[0053] Suitable resin films for the lid-side laminate film 60 include polypropylene film, polyethylene terephthalate film, and polyethylene film, with a thickness of approximately 100 to 200 μm. The lid-side laminate film 60 may be made of the same resin film as the body-side laminate film 50 and may be integrated with the body-side laminate film 50.

[0054] The lid-side laminate film 60 is bonded to the lid 24 in a tight-fitting state, and has multiple lid-side laminate protrusions 62 (see enlarged view B in Figure 2) whose shape conforms to the surface shape of the lid-side pulp protrusions 46.

[0055] The laminate protrusions 62 on the lid side are arranged in a twill weave pattern similar to that of the laminate protrusions 52 on the body side, more preferably a quadruple twill weave pattern, and the width of the grooves 64 between adjacent laminate protrusions 62 on the lid side is such that water droplets are captured on the surface of the laminate film 60 on the lid side when the lid is closed. The width of the grooves 64, that is, the opening width L2 of the grooves 64, may be 20.18 mm or more and 0.20 mm or less, similar to the opening width L1 of the grooves 54. Furthermore, the number of meshes of the multiple laminate protrusions 62 on the lid side may be 50 mesh or more and 60 mesh or less, similar to the mesh count of the laminate protrusions 52 on the body side.

[0056] As described above, since multiple lid-side laminate protrusions 62 are provided on the surface of the shallow recess 26, even if water vapor released from the cooked rice condenses (condenses) on the surface of the shallow recess 26 when the lid is closed, causing water droplets D to form on the surface of the shallow recess 26, the grooves 64 capture the water droplets D, making it difficult for the water droplets D to fall onto the cooked rice contained in the storage recess 12. As a result, the cooked rice in the storage recess 12 is less likely to become watery.

[0057] Next, the manufacturing method of the laminated pulp container 10 for cooked rice will be described with reference to Figures 4 and 5.

[0058] The manufacturing method for the laminated pulp container 10 for cooked rice comprises a molding step in which a container body 14 and a lid 24 connected to the container body 14 by hinge pieces 22 are formed by pulp molding using a molding device 100 and a papermaking screen 130 shown in Figure 4, and a laminating step in which a laminate film is bonded to the surfaces of the container body 14 and lid 24 formed in the molding step using a laminating device 150 shown in Figure 5.

[0059] As shown in Figure 4, the molding apparatus 100 includes a fixed mold (lower mold) 102 and a movable mold (upper mold) 106 driven vertically by a cylinder device 104. In the clamping state shown in Figure 4, the molding apparatus 100 includes a portion in which the fixed mold 102 and the movable mold 106 cooperate with each other to define a container body molding chamber 108 for molding the container body 14 and a lid molding chamber 110 for molding the lid 24.

[0060] In the movable mold 106, the portion that defines the container body molding chamber 108 and the lid molding chamber 110 is such that the fixed mold 102 has protrusions 102A and 102B, and the movable mold 106 has recesses 106A and 106B that receive the protrusions 102A and 102B.

[0061] A papermaking screen 130 is attached along the surface of the container body molding chamber 108 on the side that molds the surface of the receiving recess 12 of the container body 14, and along the surface of the lid molding chamber 110 on the side that molds the surface of the shallow bottom recess 26 of the lid 24, that is, along the entire surface of the fixed mold 102, including the protrusions 102A and 102B of the fixed mold 102, for forming the pulp rally.

[0062] The papermaking net 130 is made of twill weave, and in order to efficiently and effectively papermake the pulp slurry that will be used as the raw material for the container body 14 with minimal loss of pulp slurry, Figure 4 As shown in the enlarged view, one vertical wire 130A passes over three horizontal wires 130B, and then another horizontal wire 130B but It is preferable that the netting is made of a four-ply twill weave that repeatedly passes through. Furthermore, the diameter of the vertical wires 130A and horizontal wires 130B of the netting 130 is 0.18 mm or more and 0.2 mm or less, and the netting 130 is 50 mesh or more and 60 mesh or less Having this material is preferable for producing good paper.

[0063] The movable type 106 is provided with a pulp slurry supply passage 114 that supplies a turbid liquid of pulp slurry and water from a pulp slurry source (not shown) to the molding chambers including the container body molding chamber 108 and the lid molding chamber 110 via an on-off valve 112, and a hot air supply passage 118 that supplies hot air from a hot air source (not shown) to the molding chambers including the container body molding chamber 108 and the lid molding chamber 110 via an on-off valve 116.

[0064] The fixed mold 102 has a dewatering passage 120 that communicates with the molding chamber, which includes the container body molding chamber 108 and the lid molding chamber 110, via a papermaking screen 130. The dewatering passage 120 is connected to the suction pump 124 via an on / off valve 122.

[0065] In the molding process, with the mold clamped as shown in Figure 4, the on-off valve 112 is opened and a turbid mixture of pulp slurry and water is supplied from the pulp slurry supply passage 114 to the molding chamber, which includes the container body molding chamber 108 and the lid molding chamber 110. As the turbid mixture is supplied, the on-off valve 122 opens and the suction pump 124 is activated, causing the water from the turbid mixture to pass through the papermaking screen 130 and be discharged outside the molding chamber through the dewatering passage 120.

[0066] Once a predetermined amount of turbid liquid has been supplied to the molding chamber, the shut-off valve 112 is closed to stop the supply of turbid liquid to the molding chamber. After this, the shut-off valve 116 is opened to supply hot air to the molding chamber and dry the pulp slurries in the molding chamber.

[0067] Once the pulp slurry has finished drying, the shut-off valve 116 is closed to stop the supply of hot air to the molding chamber. After this, the movable mold 106 is raised by the cylinder device 104 to open the mold, and the pulp molded product, including the container body 14 and lid 24, is removed from the fixed mold 102.

[0068] The shape of the papermaking mesh 130 is transferred to the surface of the receiving recess 12 of the container body 14, forming multiple body-side pulp protrusions 44. Similarly, the shape of the papermaking mesh 130 is transferred to the surface of the shallow bottom recess 26 of the lid 24, forming multiple lid-side pulp protrusions 46. Because the papermaking mesh 130 used to form the container body 14 and the papermaking mesh 130 used to form the lid 24 are the same, the body-side pulp protrusions 44 and the lid-side pulp protrusions 46 are identical.

[0069] The pulp protrusions 44 on the main body side, which are naturally formed by the papermaking process, that is, by the transfer of the papermaking screen 130, are suitable for preventing rice grains R from adhering to the surface of the receiving recess 12, because the papermaking screen 130 is made of a four-ply twill weave with the characteristics described above. Thus, the papermaking screen 130 achieves both proper papermaking and the formation of pulp protrusions 44 on the main body side that prevent rice grains from adhering to the surface of the receiving recess 12.

[0070] Furthermore, the pulp protrusions 46 on the lid side, which are naturally formed by the papermaking process, that is, by the transfer of the papermaking screen 130, are more likely to capture water droplets D on the surface of the shallow recess 26 because the papermaking screen 130 is made of a four-ply twill weave with the characteristics described above. Thus, the papermaking screen 130 achieves both proper papermaking and the formation of pulp protrusions 46 on the lid side that easily capture water droplets D on the surface of the shallow recess 26.

[0071] As shown in Figure 5, the laminating apparatus 150 has a fixed mold (lower mold) 152 and a movable mold (upper mold) 156 driven vertically by a cylinder device 154. The fixed mold 152 and the movable mold 156 have mold surfaces of the same shape as the fixed mold 102 and movable mold 106 of the molding apparatus 100, and in the mold-open state shown in Figure 5, a pulp molded product including the container body 14 and lid 24 is placed on the fixed mold 152. The fixed mold 152 has a suction passage 158 that opens toward the mold surface. A suction pump 160 is connected to the suction passage 158.

[0072] With the mold open, a strip of film F (the material for the main body laminate film 50 and the lid laminate film 60), conveyed by the roller device 162, is passed between the fixed mold 152 and the movable mold 156 under predetermined tension. The movable mold 156 is then lowered by the cylinder device 154 to clamp the mold. In this state, the suction pump 160 is used to apply suction, making the film F adhere tightly to the pulp molded product on the fixed mold 152. After this, the film F is bonded tightly to the surface of the pulp molded product by heat welding or the like.

[0073] After the bonding is complete, the movable mold 156 is raised by the cylinder device 154 to open the mold, cut the film F, and remove the pulp molded product, in which the main body laminate film 50 and the lid laminate film 60 have been bonded together with film F, from the fixed mold 152. This completes the laminated pulp container 10 for cooked rice.

[0074] Since the main body side laminate film 50 and the lid side laminate film 60 are thin, about 100 to 200 μm thick, the pulp protrusion 44 on the main body side is substantially the same as the laminate protrusion 52 on the main body side, and the pulp protrusion 46 on the lid side is substantially the same as the laminate protrusion 62 on the lid side.

[0075] As a result, the laminate protrusion 52 on the main body side has the effect of making it difficult for rice grains R to adhere to the surface of the storage recess 12, and the laminate protrusion 62 on the lid side has the effect of making it easier to capture water droplets D on the surface of the shallow recess 26. The surface of the laminate protrusion 52 on the main body side is made of the laminate film 50 on the main body side, so it is smoother than the surface of the pulp mold material, and this also makes it difficult for rice grains R to adhere to the surface of the storage recess 12. In addition, the surface of the laminate protrusion 62 on the lid side is made of the laminate film 60 on the lid side, so it has a higher surface tension than the surface of the pulp mold material, and this also makes it difficult for rice grains R to adhere to the surface of the storage recess 12.

[0076] Although the present invention has been described above in terms of preferred embodiments, as will be easily understood by those skilled in the art, the present invention is not limited to these embodiments and can be modified as appropriate without departing from the spirit of the invention.

[0077] For example, by making the papermaking mesh 130 for forming the container body 14 and the papermaking mesh 130 for forming the lid 24 different from each other, the pulp protrusions 44 on the body side and the pulp protrusions 46 on the lid side can be made different from each other. The laminated pulp container 10 for cooked rice may not have a lid 24 and may consist only of the storage recess 12. Lamination with resin film may also be performed on the container surface of the laminated pulp container 10 for cooked rice that is opposite to the surface of the storage recess 12.

[0078] Furthermore, not all of the components shown in the above embodiments are necessarily essential, and they can be appropriately selected and omitted as long as they do not deviate from the spirit of the present invention. [Explanation of Symbols]

[0079] 10: Laminated pulp container for rice 12: Recessed area 12A: Opening 14: Container body 16: Receiving recess forming part 18: Convex part 20: Flange section 22: Hinge piece 23: Perforation 24: Lid 26: Shallow recess 28: Shallow recess forming section 30: Concave section 32: Flange section 34: Extension piece 36: Perforation 38: Slit 40:Bendable piece 42: Engaging piece 44: Pulp protrusion on the main body side 46: Pulp protrusion on the lid side 50: Laminating film for the main unit 52: Laminate protrusion on the main body side 54: Groove 60: Laminating film for the lid side 62: Laminate protrusion on the lid side 64: Groove 100: Molding mold equipment 102: Fixed type 102A:Protrusion 102B: Projection 104: Cylinder device 106: Movable type 106A: Recess 106B: Recess 108: Container body molding chamber 110: Lid molding chamber 112: Shut-off valve 114: Pulps Slurry Supply Channel 116: Shut-off valve 118:Hot air supply passage 120: Dehydration passage 122: Shut-off valve 124: Suction pump 130: Net 130A: Vertical wire 130B: Transverse wire 150: Laminating machine 152: Fixed type 154: Cylinder device 156: Movable type 158: Suction passage 160: Suction pump 162: Roller device

Claims

1. A laminated pulp container for rice, A pulp molded container body including a storage recess for storing cooked rice, It has a main body-side laminate film that is bonded to the surface of the aforementioned housing recess, The container body has a plurality of body-side pulp protrusions that project toward the receiving recess, The main body side laminate film has a plurality of main body side laminate protrusions that conform to the surface shape of the main body side pulp protrusions, The pulp protrusions on the main body have an arrangement of four twill weave patterns which are a papermaking screen transfer pattern. The multiple laminate protrusions on the main body are arranged in a four-ply twill weave pattern, and the multiple laminate protrusions on the main body have a mesh count of 50 mesh or more and 60 mesh or less. A laminated pulp container for cooked rice, wherein the opening width of the groove between the laminate protrusions on the main body is 0.18 mm or more and 0.20 mm or less.

2. The container body has an opening that opens upward toward the receiving recess, Furthermore, a lid made of pulp mold is foldably connected to the container body in order to close the opening so that it can be opened and closed, The lid has a lid-side laminate film that is bonded to the surface of the lid, which is located on the side of the receiving recess when the lid is closed. The lid has a plurality of lid-side pulp protrusions that project toward the receiving recess on the surface located on the side of the receiving recess when the opening is closed. The lid-side laminate film has a plurality of lid-side laminate protrusions that conform to the surface shape of the lid-side pulp protrusions. The pulp protrusions on the lid side have an arrangement of four twill weave patterns which are a papermaking screen transfer pattern. The multiple laminate protrusions on the lid side are arranged in a four-ply twill weave pattern, and the multiple laminate protrusions on the lid side have a mesh size of 50 mesh or more and 60 mesh or less. The laminated pulp container for cooked rice according to claim 1, wherein the opening width of the groove between the laminate protrusions on the lid side is 0.18 mm or more and 0.20 mm or less.

3. A method for manufacturing a laminated pulp container for cooked rice according to claim 1, A molding process for forming the container body by pulp molding, The process includes a lamination step in which the body-side laminate film is bonded to the surface of the housing recess of the container body formed by the molding step, The molding process is carried out using a molding die that is supplied with pulp slurry and defines a container body molding chamber for molding the container body, and a papermaking mesh provided along at least the surface of the container body molding chamber that is on the side of the surface of the container body molding chamber that molds the surface of the receiving recess of the container body, of the surface of the container body molding chamber defined by the molding die. The aforementioned net is made of a four-ply twill weave and has a mesh size of 50 mesh or more and 60 mesh or less. A method for manufacturing a laminated pulp container for cooked rice, wherein the diameter of the vertical and horizontal wires of the aforementioned mesh is 0.18 mm or more and 0.2 mm or less.

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