WO2022195923A1 - 組立式紙容器、組立式紙容器の製造方法、及び組立式紙容器の製造装置 - Google Patents
組立式紙容器、組立式紙容器の製造方法、及び組立式紙容器の製造装置 Download PDFInfo
- Publication number
- WO2022195923A1 WO2022195923A1 PCT/JP2021/033662 JP2021033662W WO2022195923A1 WO 2022195923 A1 WO2022195923 A1 WO 2022195923A1 JP 2021033662 W JP2021033662 W JP 2021033662W WO 2022195923 A1 WO2022195923 A1 WO 2022195923A1
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- Prior art keywords
- resin film
- container body
- paper container
- container
- assembled
- Prior art date
Links
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- 238000000034 method Methods 0.000 title claims description 25
- 229920005989 resin Polymers 0.000 claims description 135
- 239000011347 resin Substances 0.000 claims description 135
- 238000003825 pressing Methods 0.000 claims description 21
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- 238000003860 storage Methods 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 abstract description 8
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- 239000010410 layer Substances 0.000 description 4
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- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009448 modified atmosphere packaging Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
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- 238000012790 confirmation Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 229920005992 thermoplastic resin Polymers 0.000 description 2
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- 240000007594 Oryza sativa Species 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 229920000515 polycarbonate Polymers 0.000 description 1
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- 229920002223 polystyrene Polymers 0.000 description 1
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- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/2085—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form the central panel having incisions defining foldable flaps hinged to its edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
- B65D5/28—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/02—Feeding or positioning sheets, blanks or webs
- B31B50/10—Feeding or positioning webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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- B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B50/142—Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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- B31B50/741—Moistening; Drying; Cooling; Heating; Sterilizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
- B65D5/563—Laminated linings; Coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/002—Construction of rigid or semi-rigid containers having contracted or rolled necks, having shoulders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
- B31B2120/402—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box
- B31B2120/404—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box using vacuum or pressure means to force the liner against the wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/26—Folding sheets, blanks or webs
- B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Definitions
- the present invention relates to an assemblable paper container, a manufacturing method for this assemblable paper container, and a manufacturing apparatus for this assemblable paper container.
- an assembly type paper container in which a tray-shaped container body having a flange portion at the upper end is assembled from a blank sheet mainly made of paper.
- Some of these collapsible paper containers have a resinous thermoplastic resin film attached to the inner surface of the container body including the upper surface of the flange portion (see Patent Documents 1 and 2, etc.). Since the collapsible paper container with the resin film is resinous, it is mainly used as trays and bowls for storing food and the like.
- prefabricated paper containers are environmentally friendly products that can, for example, suppress the generation of secondary microplastics that occur in the environment.
- the resin film can be peeled off from the container body, the resin film and the paper container body can be separated, and the resin film and the container body can be recycled. Due to these advantages, for example, MAP (Modified Atmosphere Packaging) is applied to the assembled paper container, and it is expected to be used as a packaging container for foods and the like and a storage container for foods and the like.
- MAP Modified Atmosphere Packaging
- a packaging method has been developed in which the air in the storage part of the container body is replaced with food gas suitable for food (for example, MAP).
- MAP food gas suitable for food
- a top seal is attached to the resin film on the upper surface of the flange.
- the top seal is also thin, even if the top seal is adhered to the resin film, a cavity is formed along the gap between the top surface of the resin film and the bottom surface of the top seal. That is, even with a top seal, it is difficult to completely block the cavity.
- the cavity is open at both ends. Therefore, the housing portion of the container body communicates with the outside of the container body through this cavity.
- the present invention has been devised in view of the above-described problems, and its object is to suppress the leakage or seepage of the contained material from the containing portion of the container body.
- a prefabricated paper container is assembled from blank sheets mainly made of paper, and includes a container body having an accommodating portion, and a resin film covering the inner surface of the container body.
- a type paper container wherein the container body is continuous with a bottom surface, a plurality of side surfaces rising from the bottom surface, and upper end portions of the plurality of side surfaces, and extends outward from the container after assembly. and a flange portion formed on the upper surface of the flange portion, and a step extending outward from the accommodation portion side, which is generated by pasting the folded pieces of the blank sheet so as to overlap each other after assembly. and the resin film has a projection crossing the step above the step in a portion covered with the upper surface of the flange portion of the container body.
- a collapsible paper container according to the second invention is characterized in that, in the first invention, the container body is assembled from one blank sheet.
- a prefabricated paper container according to a third invention is the assembly-type paper container according to the first invention or the second invention, wherein the protrusion of the resin film forms at least one corner or arc above the step that crosses the step. It is characterized by having a cross-sectional shape with
- a prefabricated paper container according to a fourth invention in any one of the first to third inventions, includes a top seal attached to the resin film coated on the upper surface of the flange portion to cover the storage portion. Further, the top seal is adhered to the resin film above the upper surface of the flange portion while squeezing the projection portion and crossing the step.
- a prefabricated paper container according to a fifth invention is the assembly-type paper container according to the fourth invention, wherein the resin film is folded in three or more layers, including the periphery of the protrusion, when the protrusion is crushed by the top seal. characterized by being formed in
- a method for manufacturing an assembled paper container includes a container body assembled from blank sheets mainly made of paper and having an accommodating portion, and a resin film covering the inner surface of the container body.
- a plurality of side surfaces are raised from the bottom surface of the blank sheet to form the accommodating portion of the container body, the upper portions of the plurality of side surfaces are folded back, and the blank sheet is folded.
- the folded pieces are adhered so as to overlap each other, and a step extending outward from the accommodating portion is formed on the upper surface thereof, and a flange portion extending outward from the accommodating portion is formed to form the container body.
- a method for manufacturing an assembled paper container according to a seventh invention is the method for manufacturing an assembled paper container according to the sixth invention, wherein in the step of forming the protrusions and covering the resin film, the surface of the protrusion forming region crossing the step of the resin film is sucked.
- the start timing is set earlier than the start timing for extracting the air between the container body and the resin film.
- a method for manufacturing an assembled paper container according to an eighth invention is characterized in that, in the sixth invention or the seventh invention, the resin film coated on the upper surface of the flange portion, after the step of forming the protrusions and coating the resin film, It is characterized by further comprising a top seal adhering step of adhering a top seal above the upper surface of the flange portion so as to traverse the step while crushing the protrusion.
- An apparatus for manufacturing an assembled paper container includes a container body assembled from blank sheets mainly made of paper and having a storage portion, and a resin film covering the inner surface of the container body. a lower mold on which the container body is placed; and a lower mold provided in the lower mold for sucking air between the resin film and the resin film.
- a suction covering portion that covers the inner surface of the container body; an upper mold that faces the lower mold and sandwiches the resin film between the lower mold and the flange portion of the container body that is accommodated in the upper mold; and a flange pressing portion that presses the resin film on the flange portion; and a flange pressing portion provided on the flange pressing portion that sucks a protrusion forming region of the resin film on the flange portion, so that the resin film has the and a molding part for molding a projection crossing a step extending outward from the accommodating part side, which is generated by laminating the folded pieces of the blank sheet so as to overlap each other.
- a manufacturing apparatus for an assembled paper container according to a tenth invention is the apparatus for manufacturing an assembled paper container according to the ninth invention, wherein the direction of suction by the forming section in the projection forming region of the resin film is opposite to the direction of suction by the suction covering section.
- a suction force by the molding portion is set to be larger than a suction force by the suction covering portion.
- An assembled paper container manufacturing apparatus is the apparatus for manufacturing an assembled paper container according to the ninth aspect or the tenth aspect, wherein the timing of starting suction by the forming section is set to be earlier than the timing of starting suction by the suction covering section. It is characterized by
- FIG. 1(a) is a plan view showing a collapsible paper container according to an embodiment of the present invention
- FIG. 1(b) is a side view showing the collapsible paper container of FIG. 1(a).
- 1(c) is a perspective view showing the collapsible paper container of FIG. 1(a).
- FIG. 2 is an exploded view showing a blank sheet used for the assembly-type paper container of FIG. 1.
- FIG. FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG. 1, and is a schematic cross-sectional view showing an example of a protrusion.
- FIG. 4 is a plan view showing a mode in which the accommodating portion of the knockdown paper container of FIG. 1 is covered with a top seal.
- FIG. 5(a) is a cross-sectional view of the vicinity of the theoretically assumed crushed protrusion in the assembled paper container of Fig. 4, and Fig. 5(b) is an actual crushed protrusion. It is a peripheral cross-sectional view.
- FIG. 6 is a flow chart showing the steps in the manufacturing method for the assembled paper container according to the embodiment of the present invention.
- FIGS. 7(a) and 7(b) are schematic cross-sectional views showing an example of an assembly-type paper container manufacturing apparatus according to an embodiment of the present invention.
- 8(a) and 8(b) are schematic cross-sectional views showing how the protrusions are formed.
- FIG. 9 is a schematic block diagram showing an example of a manufacturing system for an assembly type paper container according to an embodiment of the present invention.
- FIG. 10(a) is a plan view showing a collapsible paper container according to an embodiment of the prior invention
- Fig. 10(b) is a side view showing the collapsible paper container of Fig. 10(a).
- 10(c) is a perspective view showing the collapsible paper container of FIG. 10(a).
- FIG. 11 is a comparison result table of experimental verification between the collapsible paper container according to the present invention and the collapsible paper container according to the previous invention.
- the assembly type paper container 1 As shown in FIGS. 1(a) to 1(c), the assembly type paper container 1 according to the embodiment of the present invention includes a container body 11, a resin film 3 covering the inner surface of the container body 11, It has
- the container body 11 has a housing portion 12 and a flange portion 13 .
- the container body 11 is assembled from one blank sheet 2 mainly made of paper as shown in FIG.
- a dotted line indicates a "valley fold” and a dashed line indicates a "mountain fold”.
- the valley fold lines and mountain fold lines are made up of, for example, perforations, half cuts, ruled lines, and the like.
- Solid lines in the blank sheet 2 indicate "notches”.
- the blank sheet 2 is subjected to "valley fold” and "mountain fold", and the folded pieces 13a and 13b are stuck together so that they overlap each other, whereby the container body 11 is constructed.
- the housing portion 12 has eight side surfaces 122 rising from the bottom surface 121 in this embodiment. Note that the accommodating portion 12 can be configured with three or more side surfaces 122 .
- the flange portion 13 is continuous with the upper end portion of each side surface 122 and extends outward from the housing portion 12 .
- steps 22 extending outward from the accommodation portion 12 side are formed at the four corners by laminating the folded pieces 13a and 13b of the blank sheet 2 so as to overlap each other after assembly. There are two.
- the resin film 3 covers the inner surface of the container body 11 including the upper surface 131 of the flange portion 13 .
- the resinous film 3 has a projection 31 above the step 22 and crossing the step 22 in the portion covered by the upper surface 131 of the flange portion 13 of the container body 11 .
- there are eight steps 22 and projections 31 are formed for each of the steps 22 .
- a plurality of protrusions 31 may be provided for one step 22 .
- the protrusion 31 has a quadrangular cross-sectional shape having two first and second corners 31a and 31b at both left and right ends of the upper surface 313 above the step 22.
- the cross-sectional shape of the protrusion 31 is not limited to such a square shape, and may be implemented in any shape such as a triangular shape or a semicircular shape.
- thermoplastic resins such as polyethylene (PE) and polypropylene (PP).
- polyester such as polyvinyl chloride, polyethylene terephthalate (PET), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer, polyamide, polyvinylidene chloride, polystyrene, polycarbonate, polybutene, polyvinyl Alcohol and the like can be mentioned.
- the resin film 3 may be a single film made of any one of the above materials, or may be a film obtained by mixing a plurality of the above materials. Moreover, the resin film 3 may be a single-layer film or a laminated film obtained by laminating a plurality of layers.
- the collapsible paper container 1 can wrap and store items such as food by covering the storage portion 12 with the top seal 4 .
- the top seal 4 is adhered to the resin film 3 on the upper surface 131 of the flange portion 13 . Thereby, the top seal 4 covers the accommodating portion 12 .
- the top seal 4 is adhered to the resin film 3 above the upper surface 131 of the flange portion 13 while crossing the step 22 and crushing the protrusions 31 .
- the top seal 4 is pressed while being heated by a pressing machine in the pressing area 32 indicated by the dotted line.
- the protrusion 31 is designed so that the entire protrusion 31 fits within the width of the pressing area 32 . Thereby, the protrusion 31 can be reliably crushed by the pressing machine.
- the lower surface 41 of the top seal 4 can be sufficiently thermo-compressed onto the upper surface of the resin film 3 above the step 22, and the top seal 4 can be It was confirmed that it could be adhered to the upper surface of the resin film 3 so as to block the cavity 5 formed by the step 22 .
- the resin film 3 which has been folded into three or more layers with the projecting portion 31 crushed, exerts a reaction force on the top seal 4 that is being pressed, and the lower surface 41 of the top seal 4 is pressed against the resin film. It was also confirmed that it is easy to thermally press-bond to the upper surface of 3.
- the blank sheet cutting step S1 for cutting and forming the blank sheet 2 is performed to manufacture the blank sheet 2 .
- a box making step S2 is performed to assemble the container body 11 from the blank sheet 2 cut out and manufactured in the blank sheet cutting step S1.
- the resin film 3 is placed on the inner surface of the container main body 11 assembled in the box-making step S2, and the surface of the projection forming region crossing the step 22 of the resin film 3 is sucked.
- a protrusion 31 is formed across the step 22, and the air between the container body 11 and the resin film 3 is extracted from the gap around the container body 11 and the resin film 3 by, for example, vacuum pressure air, and the resin
- the projection forming/resin film covering step S3 is performed to cover the inner surface of the container body 11 with the resin film 3.
- vacuum pressure air was exemplified.
- the air between the container body 11 and the resin film 3 may be discharged only by applying pressure from the upper part of the container 3 .
- the timing to start suctioning the surface of the projecting portion forming region that crosses the step 22 of the resin film 3 is adjusted between the container body 11 and the resin film 3. Make it earlier than the timing of starting extraction for extracting the air between them.
- a content such as food is placed in the storage portion 12 of the collapsible paper container 1 to which the top seal 4 manufactured in the projecting portion formation/resin film coating step S3 is not adhered. Accommodating step S4 is performed.
- a top seal sticking step S5 is performed for sticking the top seal 4 using a pressing machine so as to cross the step 22 while crushing the protrusion 31 .
- a trimming step S6 is performed to remove excess resin film 3 around the collapsible paper container 1, thereby manufacturing the collapsible paper container 1, and manufacturing the collapsible paper container 1 according to this embodiment. the method is completed.
- the manufacturing apparatus 600 for the collapsible paper container 1 according to the embodiment of the present invention can manufacture the collapsible paper container 1 according to this embodiment. It is a new manufacturing equipment. This manufacturing apparatus 600 can cover the container body 11 with the flange portion 13 with the resin film 3 and form the projecting portion 31 on the resin film 3 during the covering.
- This manufacturing apparatus 600 includes a lower mold 610 , a suction covering portion 611 , an upper mold 620 , a flange pressing portion 630 and a forming portion 631 .
- the container body 11 is placed on the lower mold 610 .
- the suction covering part 611 is provided on the lower mold 610 and connected to the vacuum pump 640 .
- the suction covering part 611 is configured to suck the resin film 3 through the container body 11 placed on the lower mold 610 so that the air can escape from the gap between the container body 11 and the circumference of the container body 11 .
- the upper mold 620 faces the lower mold 610 and can move up and down.
- the resin film 3 is sandwiched between the lower mold 610 and the upper mold 620, and when the upper mold 620 is in close contact with the lower mold 610 with the resin film 3 interposed therebetween, the processing space is substantially closed. is formed. In this processing space, the resin film 3 is covered with the accommodating portion 12 and the flange portion 13 by, for example, vacuum pressure.
- the flange pressing portion 630 is housed inside the upper die 620 .
- the flange pressing portion 630 is supported by the top plate portion 621 of the upper die 620 by an elastic member 632 such as a spring that can expand and contract.
- the flange pressing portion 630 presses the flange portion 13 and the resin film 3 on the flange portion 13 during, for example, vacuum pressure.
- the forming part 631 is provided on the flange pressing part 630 and connected to the vacuum pump 640 .
- the molding portion 631 sucks the projection forming area of the resin film 3 on the flange portion 13 .
- the protrusion forming region is set so as to traverse the step 22 .
- the projections 31 are formed, for example, while the inner surface of the container body 11 is covered with the resin film 3 .
- the direction of suction by the molding portion 631 is opposite to the direction of suction by the sticking portion 611 .
- the suction covering part 611 sucks the resin film 3 in the direction toward the container body 11 .
- the forming part 631 sucks the resin film 3 away from the container body 11 .
- the thickness T of the resin film 3 changes before and after suction. For example, after suction, the thickness T of the resin film 3 of the protrusion 31 becomes thin.
- the protrusion 31 is easier to fold or crush than when the thickness T is thick. This is one of the advantages of forming the projecting portion 31 by sucking the resin film 3 .
- the heated resin film 3 is guided between the upper mold 620 and the lower mold 610 with the upper mold 620 separated from the lower mold 610 .
- the container body 11 is placed on the lower mold 610 .
- the upper mold 620 is lowered to hold the resin film 3 with the upper mold 620 . Further, the flange portion 13 and the resin film 3 on the flange portion 13 are pressed by the flange pressing portion 630 .
- the resin film 3 is sucked by the suction cover portion 611 and the molding portion 631 respectively.
- the resin film 3 covers the bottom surface 121 of the housing portion 12 , the side surface 122 of the housing portion 12 , and the top surface 131 of the flange portion 13 .
- a projecting portion 31 that is convex with respect to the flange portion 13 is formed above the step 22 on the flange portion 13 .
- the timing at which the molding section 631 starts suctioning is earlier than the timing at which the suction covering section 611 starts suctioning.
- the direction of suction by the molding portion 631 is opposite to the direction of suction by the suction covering portion 611, and the suction force by the molding portion 631 is set to be greater than the suction force by the suction covering portion 611. Good.
- the magnitudes of the suction forces are varied in this manner, the projection formation region is easily attracted toward the outside, so that there is an advantage that the projections 31 can be easily formed.
- the upper die 620 is lifted to remove the collapsible paper container 1 from the manufacturing apparatus 600 .
- the assembly-type paper container 1 can be manufactured.
- the production system 700 for the assembly type paper container 1 is configured such that, while the resin film 3 wound around the feed roller 710 is wound by the winding roller 720, the container body 11 having the flange portion 13 is The resin film 3 is covered.
- this manufacturing system 700 includes a feeding roller 710, a winding roller 720, a heating machine 730, a manufacturing device 600, and a trimming machine 740.
- a roll of strip-shaped resin film 3 is attached to the feeding roller 710 .
- One end of the belt-shaped resin film 3 is attached to the winding roller 720, and the belt-shaped resin film 3 is wound.
- the strip-shaped resin film 3 advances along the feed direction W from the feed roller 710 toward the take-up roller 720 .
- the heater 730 is arranged between the feeding roller 710 and the winding roller 720 and heats the strip-shaped resin film 3 .
- the manufacturing device 600 is the one described above and is arranged between the heating machine 730 and the winding roller 720 .
- the trimming machine 740 is arranged between the manufacturing device 600 and the winding roller 720 and trims the knockdown paper container 1 manufactured by the manufacturing device 600 . As a result, the collapsible paper container 1 is separated from the strip-shaped resin film 3 .
- the manufacturing system 700 for the collapsible paper container 1 includes the manufacturing device 600 . Therefore, according to this manufacturing system 700, the knockdown paper container 1 can be manufactured. Moreover, according to this manufacturing system 700, the collapsible paper container 1 can be continuously manufactured from the strip-shaped resin film 3. As shown in FIG.
- the top seal 4 can be thermocompression bonded to the upper surface of the resin film 3 above the step 22 , and the top seal 4 can be attached to the resin film 3 above the step 22 .
- the upper surface of the film 3 can be coated so as to block the cavity 5 caused by the step 22 .
- the resin film 3 and the top seal 4 can be used to suppress leakage or seepage of the contents from the storage portion 12 of the container body 11.
- a type carton 1 can be provided.
- the collapsible paper container 1 according to the present invention and the collapsible paper container 100 according to the prior invention Japanese Patent Application No. 2019-235300 of the present applicant were subjected to a plurality of different conditions, and both top seals 4 was attached, and a leakage confirmation test was performed for the contents inside, and each was compared.
- the collapsible paper container 100 is assembled from blank sheets mainly made of paper, and has a container body having a storage portion 12. 11 and a resin film 3 covering the inner surface of the container 12, the container body 11 has a bottom surface 121, a plurality of side surfaces 122 rising from the bottom surface 121, and a plurality of side surfaces 122 and a flange portion 13 whose upper surface is flush after assembly.
- the resin film 3 covers the upper surface of the flange portion 13 , and above the gap 220 there is a protrusion 31 crossing the gap 220 .
- the cross-sectional shape of the protrusion 31 was square, trapezoidal, triangular, M-shaped, and half-shaped. Five kinds of circular shapes were used.
- the width of the protrusion 31 was 2 mm for the rectangular shape, 2 mm and 3 mm for the trapezoidal shape, 2 mm for the triangular shape, 2 mm for the M shape, and 2 mm for the semicircular shape.
- the height of the protrusion 31 was divided into 1 mm and 2 mm.
- collapsible paper container 1 according to the present invention is superior to the collapsible paper container 100 according to the previous invention.
- the cross-sectional shape of the protrusion 31 is square, the width is 2 mm, and the height is 2 mm. A similar leak confirmation test was conducted on five samples provided at the same position.
- the position where the protrusion 31 is provided be within the pressing area 32 of the top seal 4. I found out.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
- Making Paper Articles (AREA)
Abstract
Description
本発明の実施形態に係る組立式紙容器1は、図1(a)~図1(c)に示すように、容器本体11と、容器本体11の内面に被覆された樹脂製フィルム3と、を備えている。
以下、本発明の効果を確認するために行った実験的検証結果について説明をする。
11 容器本体
12 収容部
121 底面
122 側面
13 フランジ部
131 上面
13a 折返片
13b 折返片
2 ブランクシート
22 段差
3 樹脂製フィルム
31 突起部
31a 第1角部
31b 第2角部
313 四角形の上面
32 押圧領域
4 トップシール
41 下面
5 空洞
600 製造装置
610 下型
611 吸引被覆部
620 上型
621 天板部
630 フランジ押え部
631 成形部
632 弾性部材
640 真空ポンプ
700 製造システム
710 送給ローラー
720 巻取りローラー
730 加熱機
740 トリミング機
S1 ブランクシート切断工程
S2 製函工程
S3 突起部形成・樹脂製フィルム被覆工程
S4 収容物収容工程
S5 トップシール貼着工程
S6 トリミング工程
T 厚さ
W 送り方向
Claims (11)
- 紙を主材料とするブランクシートから組み立てられ、収容部を有した容器本体と、前記容器本体の内面に被覆された樹脂製フィルムと、を備えた組立式紙容器であって、
前記容器本体は、
底面と、
前記底面から立ち上がる複数の側面と、
前記複数の側面の上端部と連続しているとともに、組み立て後に前記収容部の外側に向けて延設されるフランジ部と、
を有し、
前記フランジ部の上面には、組み立て後に前記ブランクシートの折返片同士が重なり合うように貼り合わせられることで生じる、前記収容部側から外側に向けて延びた段差があり、
前記樹脂製フィルムは、前記容器本体の前記フランジ部の上面に被覆される部分において、前記段差の上方に、前記段差を横断する突起部を有すること
を特徴とする組立式紙容器。 - 前記容器本体は、1枚のブランクシートから組み立てられていること
を特徴とする請求項1に記載の組立式紙容器。 - 前記樹脂製フィルムの前記突起部は、前記段差の上方に、前記段差を横断する少なくとも1つの角部又は円弧部を有する断面形状であること
を特徴とする請求項1又は2に記載の組立式紙容器。 - 前記フランジ部の上面に被覆された前記樹脂製フィルムに貼着されて前記収容部を被覆するトップシールを、さらに備え、
前記トップシールは、前記フランジ部の上面の上方において、前記突起部を押し潰しつつ前記段差を横断して、前記樹脂製フィルムに貼着されていること
を特徴とする請求項1~3の何れか1項に記載の組立式紙容器。 - 前記樹脂製フィルムは、前記突起部が、前記トップシールに押し潰され、前記突起部の周辺部を含め、3層以上に折り重なるように形成されていること
を特徴とする請求項4に記載の組立式紙容器。 - 紙を主材料とするブランクシートから組み立てられ、収容部を有した容器本体と、前記容器本体の内面に被覆された樹脂製フィルムと、を備えた組立式紙容器の製造方法であって、
前記ブランクシートの底面から複数の側面を立ち上げて前記容器本体の前記収容部を形成し、これら複数の側面の上部を折り返すとともに、前記ブランクシートの折返片同士を重なり合うように貼り合わせ、その上面に前記収容部から外側に向けて延びた段差があり、前記収容部の外側に向けて延設されたフランジ部を形成して、前記容器本体を組み立てる製函工程と、
前記製函工程で組み立てた前記容器本体の内面に、前記樹脂製フィルムを配置し、前記樹脂製フィルムの前記段差を横断する突起部形成領域の表面を吸引し、前記樹脂製フィルムの前記段差の上方に、前記段差を横断する突起部を形成するとともに、前記容器本体と前記樹脂製フィルムとの間の空気を、両者の周囲の隙間から抜出し、前記容器本体の内面に前記樹脂製フィルムを被覆する突起部形成・樹脂製フィルム被覆工程と、を備えること を特徴とする組立紙容器の製造方法。 - 前記突起部形成・樹脂製フィルム被覆工程において、前記樹脂製フィルムの前記段差を横断する突起部形成領域の表面を吸引する吸引開始のタイミングを、前記容器本体と前記樹脂製フィルムとの間の空気を抜出す抜出開始のタイミングよりも早くすること
を特徴とする請求項6に記載の組立紙容器の製造方法。 - 前記突起部形成・樹脂製フィルム被覆工程の後に、前記フランジ部の上面に被覆された前記樹脂製フィルムに、前記フランジ部の上面の上方において、前記突起部を押し潰しつつ前記段差を横断するようにトップシールを貼着するトップシール貼着工程を、さらに備えること
を特徴とする請求項6又は7に記載の組立紙容器の製造方法。 - 紙を主材料とするブランクシートから組み立てられ、収容部を有した容器本体と、前記容器本体の内面に被覆された樹脂製フィルムと、を備えた組立式紙容器の製造装置であって、
前記容器本体が載置される下型と、
前記下型に設けられ、前記樹脂製フィルムとの間の空気を吸引し、前記樹脂製フィルムを前記容器本体の内面に被覆させる吸引被覆部と、
前記下型と対向し、前記下型との間に前記樹脂製フィルムが挟まれる上型と、
前記上型に収容され、前記容器本体のフランジ部と前記フランジ部上の樹脂製フィルムとを押さえるフランジ押え部と、
前記フランジ押え部に設けられ、前記フランジ部上の前記樹脂製フィルムの突起部形成領域を吸引し、前記樹脂製フィルムに、前記ブランクシートの折返片同士が重なり合うように貼り合わせられることで生じた前記収容部側から外側に向けて延びた段差を横断する突起部を成形する成形部と、
を備えたこと
を特徴とする組立紙容器の製造装置。 - 前記樹脂製フィルムの突起部形成領域において、前記成形部による吸引方向は、前記吸引被覆部による吸引方向と反対方向であるとともに、前記成形部による吸引力の方が前記吸引被覆部による吸引力よりも大きくなるように設定されていること
を特徴とする請求項9記載の組立紙容器の製造装置。 - 前記成形部による吸引開始のタイミングは、前記吸引被覆部による吸引開始のタイミングよりも早くなるように設定されていること
を特徴とする請求項9又は10に記載の組立紙容器の製造装置。
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EP21931667.6A EP4310014A1 (en) | 2021-03-19 | 2021-09-14 | Assembled paper container, method for manufacturing assembled paper container, and device for manufacturing assembled paper container |
CN202180095903.0A CN116981624A (zh) | 2021-03-19 | 2021-09-14 | 组装式纸容器、组装式纸容器的制造方法以及组装式纸容器的制造装置 |
KR1020227036503A KR20220154231A (ko) | 2021-03-19 | 2021-09-14 | 조립식 종이 용기, 조립식 종이 용기의 제조 방법 및 조립식 종이 용기의 제조 장치 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06293334A (ja) | 1993-01-28 | 1994-10-21 | Westvaco Corp | 包装容器及びそのブランク |
JPH10249961A (ja) * | 1997-03-10 | 1998-09-22 | Toppan Printing Co Ltd | 紙製トレー状容器の製造方法及び製造装置 |
JP2015528762A (ja) * | 2012-07-18 | 2015-10-01 | パッカブル・ベスローテン・フェンノートシャップPackable B.V. | トレイに箔を配置する方法 |
JP2019172339A (ja) | 2018-03-29 | 2019-10-10 | 東罐興業株式会社 | 組立紙容器及び組立紙容器の製造方法 |
-
2021
- 2021-09-14 JP JP2023506718A patent/JPWO2022195923A1/ja active Pending
- 2021-09-14 CN CN202180095903.0A patent/CN116981624A/zh active Pending
- 2021-09-14 KR KR1020227036503A patent/KR20220154231A/ko unknown
- 2021-09-14 WO PCT/JP2021/033662 patent/WO2022195923A1/ja active Application Filing
- 2021-09-14 EP EP21931667.6A patent/EP4310014A1/en active Pending
- 2021-09-23 TW TW110135320A patent/TW202237487A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06293334A (ja) | 1993-01-28 | 1994-10-21 | Westvaco Corp | 包装容器及びそのブランク |
JPH10249961A (ja) * | 1997-03-10 | 1998-09-22 | Toppan Printing Co Ltd | 紙製トレー状容器の製造方法及び製造装置 |
JP2015528762A (ja) * | 2012-07-18 | 2015-10-01 | パッカブル・ベスローテン・フェンノートシャップPackable B.V. | トレイに箔を配置する方法 |
JP2019172339A (ja) | 2018-03-29 | 2019-10-10 | 東罐興業株式会社 | 組立紙容器及び組立紙容器の製造方法 |
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