WO2001026978A1 - Recipient constitue d'un moule avec depot de pate - Google Patents
Recipient constitue d'un moule avec depot de pate Download PDFInfo
- Publication number
- WO2001026978A1 WO2001026978A1 PCT/JP2000/006818 JP0006818W WO0126978A1 WO 2001026978 A1 WO2001026978 A1 WO 2001026978A1 JP 0006818 W JP0006818 W JP 0006818W WO 0126978 A1 WO0126978 A1 WO 0126978A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pulp
- resin layer
- container
- molded
- molded article
- Prior art date
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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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/42—Applications of coated or impregnated materials
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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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
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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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
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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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
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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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
- B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
- B65D1/28—Thin-walled containers, e.g. formed by deep-drawing operations formed of laminated material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2791/00—Shaping characteristics in general
- B29C2791/001—Shaping in several steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2003/00—Use of starch or derivatives as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
- B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
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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
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
- B65D2565/381—Details of packaging materials of special type or form
- B65D2565/382—Details of packaging materials of special type or form made of special paper
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
- Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1348—Cellular material derived from plant or animal source [e.g., wood, cotton, wool, leather, etc.]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1372—Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1376—Foam or porous material containing
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
- Y10T428/1383—Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/261—In terms of molecular thickness or light wave length
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31971—Of carbohydrate
- Y10T428/31993—Of paper
Definitions
- the present invention relates to a pulp mold container. More specifically, the present invention relates to a pulp mold container in which a resin layer is formed on the inner surface or outer surface of a pulp molded article, and in particular, imparts waterproofness and moistureproofness with a smaller amount of raw materials than before. The present invention also relates to a pulp mold container having a high barrier property against gas and liquid and preventing the occurrence of blisters between a molded article and a resin layer.
- a layer having a sufficient thickness to exhibit waterproofness and moistureproofness is formed.
- a large amount of an aqueous solution of a high molecular compound is required for the formation, and the drying time is prolonged, which increases the production cost.
- the aqueous solution of the polymer compound that has permeated into the pulp layer acts as a binder that binds the pulp fibers, the disintegration of the pulp fibers is reduced, and the pulp fibers are not easily reused. .
- a thick resin layer is formed on both the inner and outer surfaces of a pulp molded article to further enhance the barrier properties against gas and liquid, a plister is generated between the molded article and the resin layer, and on the contrary, burrs are formed.
- a blister is a coating that is applied when a coating liquid is applied to the other surface of a molded product with a resin layer formed on the other surface and dried. This refers to a phenomenon in which the escape of the solvent volatilized from the liquid disappears, and the resin layer peels off from the surface of the molded product.
- a thick resin layer is formed by a single application, dripping of the coating liquid occurs after the application, and the various properties of the dried resin layer become uneven. It is conceivable to apply a thin layer of coating solution until the desired performance is obtained, but the number of manufacturing steps increases, so the manufacturing efficiency must be low and it is not cost-effective.
- Japanese Unexamined Patent Publication No. Hei 6-278016 discloses that a molding member integrated with a pulp molded article is injection-molded using the same resin component as the synthetic resin component constituting the pulp molded article. Is described.
- the molded member is integrated with the molded body, it is difficult to separate the molded body when discarding it.
- an object of the present invention is to provide a pulp mold container that can be provided with waterproof and moisture-proof properties with a smaller amount of raw materials than before and can be easily reused.
- Another object of the present invention is to provide a pulp mold container having a good appearance in which the storage stability of the contents is ensured.
- An object of the present invention is to provide a pulp mold container.
- the present invention has a resin layer formed of a synthetic resin and having a thickness of 5 to 300 ⁇ on the inner surface and the Z surface or the outer surface of the pulp molded article, and the thickness of the moisture-proof layer and the thickness of the molded article are The object has been achieved by providing a pulp mold container having a ratio (the former ⁇ the latter) of 1/2 to 100.
- FIG. 1A is a partially cutaway perspective view showing an embodiment of the pulp mold container of the present invention
- FIG. 1B is a longitudinal sectional view in FIG. 1A.
- FIGS. 2A, 2B, 2C, and 2D are schematic diagrams sequentially showing a paper making process of a process of manufacturing a pulp molded article in a pulp mold container.
- FIG. 3A is a perspective view of a second embodiment of the pulp mold container of the present invention
- FIG. 3B is a horizontal sectional view.
- FIG. 4A to 4D are schematic views showing a process of forming a resin layer on the inner surface of the pulp molded article.
- FIG. 4A shows a state before the nozzle head of the spray device is inserted into the pulp molded article.
- Fig. 4B shows a state where the nozzle head is inserted and the coating liquid is sprayed on the inner surface of the pulp molded article, and
- Fig. 4C shows a state where the nozzle head is inserted.
- FIG. 4D is a view showing a state in which a coating liquid is sprayed on the inner surface of the bottom of the pulp molded article, and
- FIG. 4D is a view showing a state in which the resin layer is being dried.
- FIGS. 5A to 5C are schematic diagrams showing a process of forming a resin layer on the outer surface of the pulp molded product.
- FIG. 5A is a diagram illustrating a process of applying the resin layer from the nozzle head of the spray device to the outer surface of the pulp molded product.
- Fig. 5B shows a state in which the coating liquid is being sprayed on the outer surface of the bottom of the pulp molded article, and
- Fig. 5C shows a state in which the resin layer is being dried.
- FIG. 6A to 6C are schematic diagrams showing a process of forming a resin layer on the inner surface of a pulp molded article.
- FIG. 6A is a diagram showing an injection state of a coating liquid by a filling nozzle.
- FIGS. 7A and 7B are schematic diagrams showing a process of forming a resin layer on the outer surface of a pulp molded article.
- FIG. 7A shows a process in which a bottle is immersed in a bath filled with a coating solution.
- FIG. 7B is a diagram showing a state in which excess coating liquid is removed.
- FIG. 8 is a partially broken perspective view showing a third embodiment of the pulp mold container of the present invention.
- FIG. 9 is a half sectional view showing a fourth embodiment of the pulp mold container of the present invention.
- FIG. 10 is a half sectional view showing a fifth embodiment of the pulp mold container of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1A shows a perspective view of a pulp mold container (hereinafter, also simply referred to as a container) according to a first embodiment of the present invention in a partially cut-out state.
- FIG. 1B shows a longitudinal sectional view of FIG. 1A.
- the pulp mold container 1 of the present embodiment has a resin layer 3 on the entire inner surface (accommodation surface) of a pulp molded product (hereinafter, also simply referred to as a molded product) 2 and has an opening 4 at an upper portion thereof.
- the body 5 has a body 5 and a bottom 6, and the body 5 further has a concave portion 7 continuous over the entire circumference.
- the container 1 is used as a hollow container suitable for storing contents such as powders, granules, and liquids.
- the outer surfaces of the front and rear walls constituting the body 5 are shaped so as to form a straight line across the height of the container 1 when the container 1 is viewed from the side (however, Except for the concave part 7).
- the outer surfaces on the left and right sides of the body 5 also have a shape that forms a straight line across the height of the container 1 when the container 1 is viewed from the front (similar to the concave shape). Excluding part 7).
- the resin layer 3 has a thickness force of 5 to 300 // m, preferably 10 to 300 ⁇ m, and more preferably 20 to 1. If the thickness is less than 5 ⁇ m, the storage stability of the contents is not sufficient because sufficient waterproof and moisture-proof effects cannot be obtained. If the thickness is more than 300 ⁇ m, it takes time to dry the resin layer 3 and it is applied at the time of application Problems such as liquid dripping and uneven thickness of the resin layer 3 may occur. The thickness of the resin layer 3 is measured by observing the cross section of the container 1 with a microscope.
- the container 1 of the present embodiment is different from the mold tray described in Japanese Patent Application Laid-Open No. H10-460500 described above, in which the region of the pulp fiber forming the molded body 2 and the resin layer 3 are formed.
- synthetic resin regions that is, in the mold tray described in the above-mentioned publication, since the aqueous solution of the polymer compound penetrates into the inside of the pulp layer having a predetermined moisture content, the boundary between the pulp fiber region and the polymer compound region is clearly defined.
- the boundary is clear because the penetration of the synthetic resin is small.
- the relative relationship between the thickness of the resin layer 3 and the thickness of the molded body 2 is such that the ratio of the former / the latter is lZSl / l00, preferably 1/5 to 1/50. If the ratio of both is more than 1/2, the disintegration at the time of reuse is inferior, and if it is less than 110, sufficient waterproof and moisture-proof properties cannot be obtained.
- the thickness of the molded body 2 is appropriately adjusted according to the use of the container 1 so that the above ratio is in a range of 1 to 2 to 110, preferably 100 to 300 ym.
- the resin layer 3 is formed from various synthetic resins.
- Synthetic resins include etalinole-based, styrene-acrylic, ethylene-vinyl acetate-based, styrene-butadiene rubber-based, polyvinyl alcohol-based, vinylidene chloride-based, plastics-based, fluorine-based, and silicone. Resins, urethane resins, melamine resins, epoxy resins, copolymers thereof, and combinations thereof.
- the coating solution may be a solution containing these synthetic resins or a dispersion.
- the solvent (medium) of the coating solution containing the synthetic resin may be an aqueous or organic solvent.
- the coating liquid contains various coloring agents such as pigments, leveling agents such as acrylic polymers and silicone resins, and pinhole preventing agents such as benzoin.
- Moyore additives be contained: the container 1, the moisture permeability (JISZ 0 2 0 8) by the force-up method force S 1 0 0 g / (m 2 - 24hr) or less, in particular 6 0 g ( m 2 - 24hr) and in which this less, Do rather moisture becomes hard to be absorbed in the atmosphere Ri, appropriate stiffness as a hollow vessel can and retaining clips retaining the quality of the contents is impaired by the absorption of moisture This is preferable in that it can be effectively prevented, that is, the storage stability of the contents can be improved.
- FIG. 2A to 2D sequentially show a paper making process of a process for manufacturing the molded body 2 in the container 1.
- FIG. 2A is a paper making process
- FIG. 2B is a core.
- the insertion process, Fig. 2C is the pressurization / dehydration process, and Fig. 2D is the process of opening the papermaking mold and removing the pulp layer.
- a cavity 13 of a papermaking mold 10 in which a cavity 13 having a predetermined shape is formed by abutting a pair of split molds 11 and 12. Inject pulp slurry into the inside.
- Each split mold 1 1, 1 2 has an external A plurality of communication holes 14 are provided to communicate the communication with the cavity 13.
- the inner surfaces of the split dies 11 and 12 are covered with nets (not shown) each having a mesh of a predetermined size.
- the shape of the cavity 13 is a shape corresponding to the outer shape of the molded body 2 to be molded.
- the shape of the cavity 13 is not limited to this. Pulp slurry is made from pulp fiber.
- the amount of the other materials may be 1 to 70% by weight, especially 5 to 50% by weight based on the weight of the obtained molded body 2. It is good.
- Other materials include inorganic substances such as talc and kaolinite, inorganic fibers such as glass fiber and carbon fiber, powder or fiber of synthetic resin such as polyolefin, non-wood or vegetable fiber, and polysaccharides. No. Next, the split molds 11 and 12 are sucked from the outside to decompress the inside of the cavity 13, and the moisture in the pulp slurry is sucked and the pulp fibers are deposited on the inner surface of the cavity 13.
- a pulp layer 15 on which nolp fibers are deposited is formed on the inner surface of the cavity 13.
- the injection of the pulp slurry is stopped, and the inside of the cavity 13 is completely sucked and dehydrated.
- the inside of the cavity 13 is sucked and depressurized, and the elastic core 16 which is expandable and contractible and has a hollow shape is placed in the cavity 13. insert.
- the core 16 inflates like a balloon in the cavity 13 and presses the pulp layer 15 against the inner surface of the cavity 13 to give the inner shape of the cavity 13 and to form the pulp layer 15. Used to pressurize and dehydrate.
- the core 16 is made of urethane, fluorine-based rubber, silicone-based rubber, or elastomer having excellent tensile strength, rebound resilience and elasticity.
- the core 16 may be a hollow bag.
- a predetermined pressurized fluid is supplied into the core 16.
- the core 16 is expanded, and the expanded core 16 presses the pulp layer 15 against the inner surface of the cavity 13.
- the pulp layer 15 is pressed against the inner surface of the cavity 13 by the expanded core 16, and the inner surface shape of the cavity 13 is transferred to the pulp layer 15 and pressure dehydration proceeds.
- the pressurized fluid used to expand the core 16 for example, compressed air (heated air), oil (heated oil), and various other liquids are used.
- the pressure for supplying the pressurized fluid is preferably from 0.01 to 5 MPa, particularly preferably from 0.1 to 3 MPa. Since the pulp layer 15 is pressed from the inside to the inner surface of the cavity 13, the density thereof becomes high (that is, the porosity becomes low). In addition, the amount of the emulsion that penetrates into the pulp layer 15 can be kept low.
- the porosity of the molded article 2 obtained by this production method is preferably 30 to 70%, more preferably 40 to 60%.
- the porosity is calculated from the following equation (1). In the following formula (1), the density of the molded body is calculated from the weight and thickness of a part of the molded body, and the density of the material constituting the molded body is determined based on the content ratio of pulp fiber and other components. Calculated from density.
- Blank ratio ( % ) — density of molded body) ⁇ 100 .. (1 ) Density of material constituting molded body
- the above-mentioned pressing smoothes the inner and outer surfaces of pulp layer 15.
- the center line average roughness (Ra, a value measured in accordance with JISB 0601) of the outer or inner surface of the molded product 2 obtained by the present production method is 0. 5 to 20 / xm, preferably 0.5 to 10 ⁇
- the maximum height (Rmax, a value measured in accordance with JISB0601) is preferably 1 to 500 ⁇ , more preferably 5 to 100 / xm.
- the coating liquid can be applied without causing the coating liquid to flow. Further, printing on the outer surface of the molded body 2 can be performed easily and neatly. Further, the impression of the appearance of the container 1 is further improved.
- Surf Com 12 OA manufactured by Tokyo Seimitsu Co., Ltd. was used to measure the surface roughness. The measurement conditions were as follows: cut-off: 0.8 mm, measurement length: 10 mm, filter: 2 CR, measurement magnification: 500, inclination detection: linear, polarity: standard.
- the porosity of the pulp layer 15 and the molded body 2 is too low due to the pressing, the permeability of the emulsion will be too low, and conversely, the adhesion to the resin layer 3 may be low. Therefore, in consideration of the Emarujo emissions permeability, Cobb water absorbency of a molded article 2 (JISP 8 1 4 0) force; 5 ⁇ 6 0 0 g / / (m 2 ⁇ 2 minutes), in particular 1 0-2 It is preferable that the molded body 2 is formed so as to obtain 0 g / (m 2 -2 minutes). Due to the above pressing, the shape of the inner surface of the cavity 13 is accurately transferred to the pulp layer 15 even if the shape of the inner surface of the cavity 13 is complicated.
- the obtained molded body 2 has no joints and thick portions due to bonding.
- the strength of the obtained molded body 2 is increased and the appearance impression is improved.
- the moisture content of the pulp layer 15 is preferably set to about 50 to 80% by weight in consideration of handleability and the like.
- the removed pulp layer 15 is then subjected to predrying, emulsion coating and drying steps. In these steps, except for papermaking and dewatering, The same apparatus as that used in the paper making process shown in FIG. 2 is used, and substantially the same operation is performed. That is, first, a heating mold in which a cavity having a shape corresponding to the outer shape of the molded body 2 to be molded is formed by abutting a pair of split molds is heated to a predetermined temperature, and the inside of the heating mold is heated. Is charged with the pulp layer in a wet state.
- a core similar to the core 16 used in the papermaking step was inserted into the pulp layer, and a pressurized fluid was supplied into the core to expand the core.
- the pulp layer is pressed against the inner surface of the cavity by a core and pre-dried:
- the material of the core and the supply pressure of the pressurized fluid can be the same as in the papermaking process.
- the pressing of the core further increases the density of the pulp layer (ie, further reduces the porosity).
- the pressurized fluid in the core is drained, and the core is shrunk and taken out.
- an emulsion of a synthetic resin is sprayed into the pulp layer by a predetermined spraying means to apply the emulsion to the inner surface of the pulp layer.
- a predetermined spraying means instead of spraying, diving or brushing can be used.
- the Emarujiyo emissions is therefore c in the state had difficulty to penetrate into the interior of the pulp layer, of the Emarujo down Most of the water stays on the surface of the pulp layer, and sufficient water / moisture resistance can be obtained by applying a smaller amount of emulsion than before. Also, it is possible to prevent the disintegration of the pulp fiber from being reduced during reuse.
- a synthetic resin having a particle size of about 0.01 to 10 ⁇ is used in terms of controlling the penetration of the emulsion into the pulp layer. I like it.
- the emulsion coating film and the pulp layer are dried in a heating mold to form a resin layer from the coating film and a molded body 2 from the pulp layer.
- the heating mold is opened, and the container 1 having the resin layer 3 on the inner surface of the molded body 2 is taken out.
- 3A and 3B show a pulp mold container according to a second embodiment of the present invention.
- the pulp mold container 1 of the present embodiment has an opening 4, a trunk 5, and a bottom 6, and has a corner around the trunk 5 and between the trunk 5 and the bottom 6.
- the pulp mold container 1 has a resin layer 3 formed on its inner surface.
- the pulp mold container 1 has a corner portion 5a and a flat portion 5b on the body portion 5, and the thickness of the resin layer 3 at the corner portion 5a is equal to the thickness of the resin layer 3 at the flat portion 5b. Thicker. By doing so, the desired performance can be uniformly obtained in the resin layer 3 existing in the corner portions 5a and the flat portions 5b.
- the coating liquid per unit area of the surface of the corner 5a is larger than the coating amount of the coating liquid per unit area of the surface of the flat portion 5b (that is, the portion other than the corner portion 5a of the body portion 5).
- the resin such as the waterproof, moisture-proof, and gas barrier properties including the corner 5 a is made uniform (resin on the surface of the corner 5 a) so as to be uniform throughout the container.
- pulp molding By appropriately adjusting the rotation speed using the centrifugal force caused by the rotation of the shaped body, the amount of coating liquid applied per unit area of the corner 5a surface can be reduced, and the unit area of the flat portion 5b surface can be reduced. It can be larger than the coating amount of the coating solution.
- the resin layer when the resin layer is formed on the surface of the pulp molded article, at least the undried resin layer formed on the surface of the pulp molded article after the application of the coating liquid is applied.
- the state is a state in which the finger is not touched even when the finger or finger wearing gloves such as latex made of powder free touches the resin layer. it can be determined that the (data The check of the free flow is performed immediately after the rotation of the molded product is stopped, and the time required for tack free immediately after the application of the coating liquid (tack free time) is determined by the type of the coating liquid.
- the tack free time is 30 to 150 seconds.
- a method of applying the coating liquid there are a method of spraying the coating liquid, and a method of immersing the pulp molded article in a tank filled with the coating liquid.
- the molded article A method of injecting the coating liquid into the coating liquid and then discharging the coating liquid is described below.
- the thickness of the coating liquid for forming the undried resin layer is such that the waterproof, moisture-proof and gas barrier properties are sufficiently imparted. Or, evenly waterproof, moisture-proof, gas with thick film In terms of forming a resin layer having various W barrier properties, the thickness is preferably 20 to 300 / zm, more preferably 40 to 200 ⁇ . No.
- the coating amount of the coating solution for forming the above-mentioned undried resin layer is such that the waterproof, moisture-proof and gas barrier properties are sufficiently imparted, or the waterproof, moisture-proof and gas barrier properties are uniformly formed by a thick film.
- the predetermined axis refers to an axis passing through the center of gravity of the molded article. Further, in the present invention, the pulp molded article can be continuously rotated around two axes including another axis having a predetermined angle with respect to the predetermined axis.
- the maximum rotational speed around the predetermined shaft is preferably 7 to 130 mmin from the viewpoint of preventing dripping of the coating solution and uniforming the above-mentioned various performances, and is preferably 15 to 800 mmin. m / min is more preferable.
- the rotation speed can be constant or intermittent depending on the form of the molded body on which the resin layer is formed.
- the pulp molded article is kept rotating around a predetermined axis until the undried resin layer formed on the surface of the pulp molded article becomes tack-free, and then the resin layer is dried.
- the method for drying the resin layer can be appropriately selected according to the coating liquid for forming the resin layer.
- the method for drying the resin layer by blowing a stream of heated air or the like onto the resin layer And a method of drying by irradiating a far infrared ray, a microwave, an ultraviolet ray, an electron beam, or the like.
- a method of blowing an air current such as an infrared ray or a heated air and a method of irradiating an infrared ray or a far-infrared ray are preferably used in view of the scale of the production equipment and the handling property.
- the drying time can be appropriately set according to the composition of the resin layer, the thickness of the resin layer, and the drying method.
- the undried resin layer formed on the surface of the pulp molded article is used because the resin layer can be dried evenly and various properties such as waterproofness, moistureproofness and gas barrier properties can be made more uniform. It is preferable that the pulp molded article is continuously rotated about the predetermined axis until the resin layer is dried, and then rotated around the predetermined axis in the step of drying the resin layer.
- the method of forming the resin layer in the present embodiment will be described with reference to FIGS. 4 and 5 by taking as an example the case where the resin layer is formed on the inner surface and the outer surface of the hollow bottle-shaped pulp molded article 2. This will be described in detail.
- the molded body 2 is horizontally and circumferentially moved around its central axis C by a predetermined gripping means (not shown) on the bottom side thereof. Then, the nozzle head 20 of the spray device 21 is inserted through the opening 4 of the molded body 2. Next, as shown in FIG. 4B, the molded body 2 is rotated around the central axis C at a predetermined rotational speed by the gripping means. Then, the nozzle head 20 inserted into the molded body 2 is moved in the horizontal direction, and the coating liquid is applied from the body to the opening of the molded body 2.
- the molded body 2 and the nozzle head 20 may be relatively rotated, or the molded body 2 may be fixed and the nozzle head 20 may be rotated. It can also be done. Subsequently, as shown in FIG. 4C, the coating liquid is applied to the bottom of the molded body 2 with the nozzle head 20 positioned at a predetermined position while rotating the molded body 2 at a predetermined rotation speed. . Then, the rotation of the molded body 2 is continued until the undried resin layer formed on the surface becomes tack-free.
- the spray device 21 an air spray, an airless spray, an electrostatic spray, or the like can be used.
- the discharge direction and the discharge width of the nozzle head 20 to the molded body 2 can be appropriately selected according to the shape of the molded body 2 and the like. For example, using a nozzle head with a narrow discharge width at the corner of the compact It can be applied over a wide area at once using a nozzle head that can be applied or has a wide ejection width and can be ejected radially.
- the molded body 2 is moved from the painting bus S to the drying booth D, and the molded body 2 is moved horizontally and around the central axis C in the drying booth D in the same manner as described above. At a predetermined rotation speed.
- a nozzle 22 for blowing hot air of a predetermined temperature in a curtain shape is inserted into the molded body 2, and the undried tree formed on the inner surface of the molded body 2 is formed. Dry the oily layer.
- the molded body 2 is moved to a drying booth S for painting the outer surface, as shown in FIG. 5A.
- the molded body 2 is fixed by inserting gripping means (not shown) from the opening thereof, and the molded body 2 is supported horizontally and rotatably around its central axis C. Further, an extra grip may be formed on the opening side of the molded body 2 (the grip will be deleted in a later step.).
- the grip may be gripped by gripping means. Then, the molded body 2 is rotated at a predetermined rotational speed horizontally and around the central axis thereof. Then, at a predetermined position above the molded body 2, the nozzle head 20 is horizontally moved to apply a predetermined amount of a coating liquid to the outer surface from the opening of the molded body 2 to the body. Next, as shown in FIG. 5B, the molded body 2 is continuously rotated at a predetermined rotation speed, and at a position away from the bottom of the molded body 2 by a predetermined distance, the molded body 2 is moved with the nozzle head 20. A predetermined amount of a coating solution is applied to the outer surface of the bottom of the coating.
- the rotation of the molded body 2 is continued until the undried resin layer formed on the surface becomes tack-free.
- the molded body 2 is moved from the painting booth S to the drying booth D, and in the drying booth D, the molded body 2 is moved horizontally and around the center axis C in the same manner as described above. Rotate at rotational speed. It is preferable that the rotation be continued even when the compact 2 is moved from the painting booth S to the drying booth D.
- hot air of a predetermined temperature is blown for a predetermined time from a nozzle 22 that blows hot air in a curtain shape to dry an undried resin layer formed on the outer surface of the molded body 2.
- a resin layer capable of uniformly obtaining desired performance can be efficiently formed on the inner surface and the outer surface of the molded body 2.
- the pulp mold container obtained in this way has a desired performance uniformly on its inner surface or outer surface.
- FIGS. 6A to 6C show a method of forming a resin layer on the inner surface of the molded body 2, and first, as shown in FIG.
- the molded body 2 In a state in which is tilted at a predetermined angle from the vertical axis, the molded body 2 is rotatably supported around the center axis by a gripping means (not shown), and the coating liquid filling nozzle 23 is inserted through the opening of the molded body 2 Then, the molded body 2 is rotated around the central axis at a predetermined rotation speed, and the coating liquid is injected into the molded body 2 from the filling nozzle 23. Then, as shown in FIG. 6B, after the filling nozzle 23 is retracted from the inside of the molded body 2, as shown in FIG. 6C, the molded body 2 is continuously rotated and around the horizontal axis in the vertical plane as shown in FIG. 6C.
- FIGS. 7A and 7B show a method of forming a resin layer on the outer surface of the molded body 2.
- the molded body 2 is gripped at the opening side (see FIG. 7A). (Not shown) and immersed in the tank P filled with the coating solution for a predetermined time.
- the molded body 2 is tilted at a predetermined angle from the vertical axis, and is rotated around its central axis C while the excess adhered to the outer surface. Remove the coating solution.
- the thickness of the resin layer at the corner 5 a ′ between the body and the bottom of the molded body 2 can be made larger than that of the body (other parts). And its performance Can be made uniform with the torso.
- the coating liquid discharged from the sharpening nozzle toward the outer surface of the molded body 2 is applied by shaping. You can do it.
- the positions of the corners described above are the positions of the large curvature located at both ends of the long axis. That is. FIG.
- the container 1 shown in FIG. 8 has resin layers 3a and 3b on both the outer surface and the inner surface of the pulp molded article 2 (hereinafter, when referring to the resin layer formed on the outer surface, Is called the outer layer, and when it refers to the resin layer formed on the inner surface, it is called the inner layer).
- the container 1 is a cylindrical bottle composed of an opening 4 consisting of an open mouth and neck, a body 5 and a bottom 6.
- the diameter of the body 5 and the bottom 6 of the container 1 is substantially the same, and the diameter of the mouth and neck is smaller than the diameter of the body 5.
- the diameter of the trunk 5 is set to 20 to 100 mm, particularly 40 to 80 mm.
- the diameter of the mouth and neck is 10 to 50 mm, especially 15 to 35 mm.
- the container 1 has a body 5 formed substantially at right angles to the bottom 6. That is, the taper angle of the trunk 5 is set to about 0 degrees.
- the container 1 of the present embodiment has an overall height of 50 mm or more, particularly 100 mm or more.
- the outer layer 3 a and the outer layer 3 b are formed over the entire outer surface and inner surface of the molded body 2.
- the outer layer 3a and the inner layer 3b have different moisture permeability. The difference in moisture permeability between the two layers effectively prevents the occurrence of pre-listers while preventing the barrier property of the container 1 against gas and liquid from lowering. Also, the appearance of the container 1 is prevented from being deteriorated.
- the inner layer 3b is If the inner layer 3b is formed by drying when the inner layer 3b is formed by drying, the solvent that has volatilized forms the molded body 2 and the outer layer 3 that has a relatively high moisture permeability. a can pass through and escape to the outside, making it difficult to stay inside. As a result, blistering is prevented.
- the resin layers are formed on both the inner and outer surfaces of the molded body 2, the barrier property of the container 1 against gas and liquid becomes extremely high.
- the moisture permeability in the present invention refers to a value measured according to JISZ 208. Specifically, a test piece is cut out from the container 1, and one of the resin layers is removed by mechanical means such as scraping, and the measurement is performed in a state where the other resin layer is in close contact with the molded body 2.
- the difference between the moisture permeability of the moisture permeation degree and an inner layer 3 b of the outer layer 3 a is, 1 0 g Z (m 2 '24hr) or more, particularly 2 0 ⁇ 3 0 0 g (m 2 - 24hr) Dearuko and are preferred. If the above difference is less than 10 g / (m 2 ⁇ 24 hr), a prestere may be generated, which is not preferable in appearance.
- the difference is 3 0 0 g (m 2 - 24hr)
- Insufficient water vapor barrier properties and water resistance may result in appearance defects and adverse effects on the storage stability of the contents. For example, caking may occur when filling with a highly water-absorbing content such as a powder detergent, or weight loss may occur when filling with a highly volatile content such as alcohol.
- a specific value of moisture permeability one of the moisture permeability of the outer layer 3 a and an inner layer 3 b is favored properly is 1 0 0 g Z (m 2 ⁇ 24hr) or less, more preferred properly 1 0 550 g / (m 2 ⁇ 24 hr).
- the moisture permeability of the other layer is preferably 20 g / (m 2 -24 hr) or more, particularly preferably 30 to 350 g / (m 2 -24 hr).
- the moisture permeability 2 0 g / (m 2 - 24hr) is less than, dried blisters are generated in the resin layer at the time, there is a case where defect appearance occurs, 3 5 0 g Z (m 2 ⁇ 24hr If it is more than 1, the water resistance of the container 1 and the barrier property of the container 1 are insufficient, and the strength of the container 1 may be reduced due to water absorption or a defect in the appearance may occur.
- the relative magnitude relationship between the moisture permeability of the outer layer 3a and the moisture permeability of the inner layer 3b is appropriately selected according to the type of the contents to be filled in the container 1.
- the moisture permeability of the inner layer 3b is determined by the moisture permeability of the outer layer 3a. It is preferable that the size is smaller.
- the moisture permeability is smaller than the moisture permeability of the inner layer 3b. If the thickness of the resin layer is increased, bubbles resulting from the volatilization of the solvent during the formation may be trapped in the layer, and the barrier properties may decrease.
- FIG. 9 shows a pulp mold container according to a fourth embodiment of the present invention.
- the pulp mold container 1 of the present embodiment has a resin layer (not shown) on the outer surface and the inner surface, and a molding member 50 is mounted on an opening thereof.
- a lid 30 is screwed to the molded member 50.
- a fitting recess 40 is formed on the outer peripheral surface of the opening of the container 1.
- a fitting projection 52 is formed on the inner peripheral surface of the peripheral wall of the molded member 50. Then, the fitting member 50 is fitted to the opening of the container 1 by fitting the fitting concave portion 40 and the fitting convex portion 50 together.
- a thread 51 is formed on the outer peripheral surface of the molded member 50, and a screw groove 31 formed on the inner peripheral surface of the lid 30 is screwed onto the thread 51, thereby forming a lid.
- the body 30 can be attached to the container 1.
- the container 1 can withstand normal use, and can be easily separated at the time of disposal (also referred to as easy separation and disposal).
- the compressive strength (vertical compressive strength) is preferably from 10 to 100 N, more preferably from 100 to 700. Further, the compression strength when the side surface of the molded member 50 is compressed in a state where the molded member 50 is mounted (side surface compressive rupture strength: refer to the examples) is 10 to 500 N, preferably 100. , Preferably up to 300 N.
- the density of the pulp molded article 2 constituting the W pulp mold container 1 (that is, the density of the wall of the molded article) is set to 0.4 to 2.0 O g Z cm 3 so that the tensile strength and compression Sufficient mechanical properties such as strength can be obtained, and appropriate rigidity can be obtained even when a hollow container is used. Further, by setting the above density more preferably to 0.6 to 1.5 g Z cm 3 , a container excellent in usability can be obtained.
- the molding member 50 attached to the opening of the pulp mold container 1 and the lid 30 screwed to the molding member 50 are both formed of a composition containing natural fibers and a binder. . As natural fibers, combustible fibers or powders are used.
- the term “combustible” means that incineration and disposal can be carried out while minimizing the generation of environmentally harmful substances. It is preferable that the fiber or the powder is made of a material derived from a natural product in addition to being combustible.
- the “natural material” refers to a natural product itself or a material obtained by subjecting a natural product to primary or higher processing, and includes a so-called biomass material.
- Examples of the combustible fiber or the powder particularly the combustible fiber or the powder made of a material derived from a natural product, include pulp (virgin pulp and waste paper pulp), wood flour, cotton, hemp , Silk, wool, feathers, rice husks, and dried food powder such as okara.
- pulp virtual pulp and waste paper pulp
- wood flour wood flour
- cotton cotton
- hemp silk
- wool wool
- feathers rice husks
- dried food powder such as okara.
- Virgin pulp, waste paper pulp, and the like are particularly preferably used as the fiber or the powder from the viewpoint of easy availability of raw materials, stability, and reduction in production cost.
- the fibers or the powders are used alone or in a mixture of both.
- the fiber length or particle size is selected according to the moldability derived from the shapes of the molding member 50 and the lid 30 and the strength required for the molding member 50 and the lid 30 and is particularly limited.
- the fiber length or particle size must be large enough to be classified with a filter of 100 or less.
- the blending amount of the above fibers or the above powder in the composition is preferably 40 to 90% by weight, more preferably 40 to 90% by weight, from the viewpoint of compatibility between easy separation by breakage and the like and moldability. 4 0-8 0 wt%, more preferred properly is Ru 4 0-6 0 weight 0/0 der.
- the amount of the fiber or the powder in the composition is preferably more than 50 to 90% by weight.
- thermoplastic resin a thermoplastic resin, a biodegradable polymer, or a natural polysaccharide
- thermoplastic resins include thermoplastic resins commonly used for plastic molded articles, such as polyolefin resins such as polyethylene, polypropylene, and polyvinyl acetate, and polyethylene terephthalate.
- Polyamide resins such as polyester resins and nylon, and polybutyl resins such as polyvinyl chloride, polystyrene, and polybutyl alcohol, and / or copolymers thereof are used.
- thermoplastic resins are used alone or as a mixture of two or more kinds.
- the biodegradable polymer include polymers derived from microorganisms such as polyhydroxybutyric acid and its derivatives, bacterial cellulose and pullulan, and chemicals such as polyproprolactone, polylactic acid, and aliphatic polyester. Synthetic polymers are used. These biodegradable polymers are used alone or as a mixture of two or more. As natural polysaccharides, starch, chitin, chitosan, carrageenan, agar, lignin and the like can be used, and proteins such as wheat gluten and gelatin can also be used.
- composition forming the molded member 50 and the lid 30 in addition to the above-mentioned two components of the natural fiber and the binder, other components can be blended if necessary.
- examples of such components include titanium oxide powder, zinc oxide powder, inorganic pigment components such as carbon black, graphite, red iron oxide, ultramarine, chromium oxide, phthalocyanine, azo pigments, and condensed polycyclic pigments.
- Organic pigment components such as oils and fats
- Auxiliary components such as a body or a lubricant such as a surfactant and a plasticizer.
- These components are preferably blended in a composition for forming the molded member 50 and the lid 30 with ⁇ 10% by weight.
- the molded member 50 and the lid 30 can be manufactured according to the following manufacturing methods 1 to 3 depending on the type of the binder used.
- the molding member 50 and the lid 30 are manufactured by supplying a pellet made of the above composition for forming them to a molding machine usually used for injection molding of a plastic material and subjecting the pellet to injection molding. be able to.
- the molding conditions for this injection molding can be freely selected, but in particular, when a molded member having excellent plastic mold transferability and a uniform color tone is to be obtained.
- the molding conditions are as follows: Assuming that the thermal deformation temperature of the thermoplastic resin, which is the binder contained in the composition, is T d, the injection molding die is T c! To (T d +20) ° C., and injection molding is performed in this state.
- the heating temperature of the mold for injection molding is lower than T d ° C, especially in the molded product, the resin component solidifies before sufficiently leaching to the surface, and even if a mirror-finished mold is used, short fibers or Unevenness of the powder remains, and a molded article having a desired mirror surface cannot be obtained.
- Td + 20 the temperature exceeds (Td + 20) ° C, the solidification of the resin is not promoted and the molded body is deformed after being taken out due to insufficient cooling. Injection molds (Td + 10) to (Td + 20).
- the heat distortion temperature is a value measured according to ASTM D648.
- the heat distortion temperature means the heat distortion temperature of the resin having the highest heat distortion temperature.
- thermoplastic resin binder When a biodegradable polymer binder is used, injection molding can be performed in the same manner as when the above-mentioned thermoplastic resin binder is used.
- the force and the molding temperature are appropriately set according to the characteristics of the binder.
- a natural polysaccharide binder for example, water, oils and fats, alcohols, etc. are added to natural fibers as binders and plasticizers, kneaded, and supplied in a so-called paper clay state into a mold, and then heated.
- a pressing method can be used.
- a papermaking press method or an injection molding method can be used.
- the molded member 50 manufactured in this way is driven and fitted from above the opening of the pulp molded container 1 so that both are closely fitted. Then, the lid 30 is screwed to the molded member 50.
- the container 1 of the fifth embodiment shown in FIG. 10 is similar to the container of the fourth embodiment shown in FIG. 9, and has a resin layer (not shown) on its outer surface and inner surface. .
- fitting concave portions 40 and projecting portions 41 are alternately formed on the outer peripheral surface of the opening of the container 1 at regular intervals.
- the molded member 50 has a fitting piece portion 5 having a U-shaped cross section provided with a fitting claw 53 at its distal end, which fits between the protruding portions 41 and can be fitted into the fitting concave portion 40. 4 are provided.
- a resin layer is formed on each of the outer surface and the inner surface of the pulp molded body 2 (in the present embodiment, the molded member 5 is pushed in from above the opening of the container 1). Then, the pulp mold container 1 can be discarded as it is, but when the pulp mold container 1 is separated and discarded, the fitting piece portion 54 of the molding member 50 is moved upward.
- the molded member 50 and the container 1 can be easily separated by lifting the mating recess 40 and the mating claw 53 together. The work is easy.
- the cylindrical molding member 50 is mounted on the pulp mold container 1 having an opening that opens upward, but the mounting position of the molding member is not limited to this.
- the present invention is not limited to this, as long as the molding member is attached to a part of the pulp mold container.
- a molding member having a form that forms the bottom of the pulp mold container may be attached to the opening of the pulp mold container having an opening that opens downward.
- a mouth-neck-shaped and bottom-shaped molded member can be attached to each opening of a cylindrical pulp mold container having an opening that opens upward and downward.
- the mounting of the molded member to the pulp mold container is not limited to the fitting, and other mounting methods such as screwing may be appropriately performed according to the properties of the contents to be stored. Can be adopted. Further, in addition to fitting the molded member to the pulp mold container and attaching them with an adhesive, the hermeticity can be improved.
- an adhesive having a low risk of environmental pollution for example, cell mouth, collagen, the above polysaccharide, carboxymethylcellulose (CMC), hydroxypropynolecellulose (HPC), or polystyrene It is preferable to use vinyl alcohol (PVA) or the like.
- the pulp mold container and the molding member are manufactured as separate members, and then the molding member is attached to the opening of the pulp mold container.
- the pulp mold container is placed in an injection molding die, and a molding member is injection-molded in the opening to integrate them. You can also.
- the molded member 50 and the lid 30 in the fourth and fifth embodiments When the content of natural fibers such as lup fiber is 51% by weight or more, they are generally handled as paper products. However, in this case, a binder such as a thermoplastic resin becomes a surface layer with a relatively high probability due to phenomena such as flow shear at the time of injection molding and leaching of a molten resin into a mold interface.
- the ratio of the pulp fiber to the thermoplastic resin in the surface layer depends on the molding conditions such as the mold temperature, a thermoplastic resin having a high fluidity generally tends to appear more easily.
- the molded member 50 and the lid 30 exhibit a resin-like texture, making it difficult for the user to recognize that it is a paper product. There is. Therefore, when the molding member 50 and / or the lid portion 30 are formed by injection molding with pulp fiber as a main component and resin as a subcomponent, the molding member 50 and / or the lid portion are used.
- a predetermined portion is torn off so that the exposed surface is present on the surface, so that the exposed surface has fluffing of the pulp fiber, whereby the exposed surface has a paper-like appearance. become.
- the “main component” mentioned above refers to the component having the highest blending ratio (weight ratio) among the raw materials constituting the molded member 50 and / or the lid portion 30, and the “subcomponent” is blended more than the main component.
- the pulp fiber, which is the main component of the molded members 50 and Z or the lid portion 30, is blended at 51 to 70% by weight, particularly at 53 to 57% by weight.
- thermoplastic resin is used as a resin which is a sub-component constituting the molded member 50 and the lid or the lid portion 30.
- Resin content should be 30 to 49% by weight, especially 43 to 47% by weight, corresponding to the amount of pulp fiber, and should be low in moldability, mechanical strength, disposability, and even lower. It is preferable from the viewpoint of cost reduction.
- the following method can be used.
- a molded body composed of a molding member 50 or a lid 30 and a predetermined portion of the molded body main body are formed by injection molding from a molding raw material containing pulp fibers as a main component and a resin as an auxiliary component. After the formed torn portion is formed, the torn portion is torn off from the molded body to thereby be exposed on the surface of the molded body, that is, the surface of the molded member 50 or the lid portion 30. To form a finished surface. Specifically, molding is performed using an injection mold having a first cavity and a second cavity communicating with the first cavity.
- the first cavity has a shape corresponding to the molded body composed of the molded member 50 or the lid portion 30, and the second cavity has a shape corresponding to the tear-off portion.
- the first cavity and the second cavity are arranged in a positional relationship such that the torn portion is torn off from the molded body by the mold opening operation of the mold.
- the mold opening operation and the tearing-off operation of the mold can be performed simultaneously, and the machine operation time is reduced.
- a continuous portion of the molded body composed of the molded member 50 or the lid portion 30 and the tear-off portion has a tapered shape that gradually becomes thinner toward the molded body main body. This facilitates tearing of the tearing portion.
- the tearing of the tearing portion is performed at a point where the molded body main body composed of the molding member 50 or the lid portion 30 and the tearing portion are cooled to a predetermined temperature.
- the forming raw material is made up of 100% resin, such tearing is limited to a very small area, but the forming raw material is mainly composed of pulp fibers and the resin is a minor component. The mixture can be easily torn off over a large area.
- the tearing of the tearing portion can be performed while the molded body and the tearing portion are being cooled.
- the present invention is not limited to the above-described embodiment.
- the container 1 In place where the load is applied, for example, the opening 4 and the bottom 6, a reinforcing member made of plastic or the like is provided in place of the above-described molded member 50 so as to improve the durability of the container 1. Is also good.
- a part of these parts may be formed of plastic or the like.
- the pulp molded article may be formed, for example, in the form of a cylinder having a bottom. And a cylindrical form.
- the resin layer formed on the outer surface of the pulp molded article may be decorated with characters, figures, symbols, etc., depending on the use of the container 1 and the like. Further, the above embodiments can be replaced with each other.
- a pulp molded article having the shape shown in Fig. 8 was formed by the pulp molding method.
- the thickness of the molded body was 1.0 mm.
- the center line average roughness (R a) of the inner surface of the molded body is 2.4 ⁇ m
- the maximum height (Rmax) is 30 ⁇ m
- the center line average roughness (R a) of the outer surface is 2 ⁇ m. 6 ⁇ m
- the maximum height (Rmax) was 35 ⁇ m.
- the bump had a water absorption of 25 g / (m 2 -2 minutes). Further, the porosity of the molded product was 58%.
- a coating solution containing a synthetic resin emulsion and an orexin-based wax shown in Table 1 was applied to the outer surface of the molded body by spray coating to form an outer layer having a thickness shown in Table 1.
- Table 1 also shows the moisture permeability of the outer layer.
- a coating liquid having the same composition as the above coating liquid was applied to the inner surface of the molded body by spray coating to form an inner layer having a thickness shown in Table 1.
- Table 1 also shows the moisture permeability of the inner layer.
- the pulp mold container thus obtained was filled with a powdered synthetic detergent, the mouth and neck were sealed, and stored for 30 days in an environment of 40 ° C and 90 ⁇ 9RH, and the contents were Changes in solidification of the material (storage stability) were observed. Also, the obtained The presence or absence of blisters in the rup mold container was observed. Table 1 shows these results.
- the containers of the examples have a lower moisture permeability, a higher barrier property, and a higher content than the containers of the comparative examples. It can be seen that the storage stability of the product is excellent. In addition, no blister was observed in the container of each example. (Example 3)
- Example 2 The pulp mold container obtained in Example 1 was fitted with a molding member having a screw-type opening / closing function and a lid prepared as described below. One run torque and durability of repeated opening and closing were evaluated. The results are shown in Table 2. K Molded Member>
- a nozzle ring (molded member) having a thread on the outer peripheral surface was prepared by an injection molding method.
- Natural fiber O A waste paper fiber 40% by weight
- Pigment 2% by weight titanium oxide pigment
- Natural fiber OA waste paper fiber 40 weight. / 0 ;
- the strength was evaluated based on the drop strength and the vertical compressive strength as the performance evaluation of the following ordinary containers, and the side compressive rupture strength as the evaluation of easily separable waste.
- a predetermined volume of filler (product name: “Wide Height”, 750 g, manufactured by Kao Corporation) is filled in a pulp mold container equipped with a molding member, and a lid is attached. Crack the container by dropping it on the concrete floor at a height of 1.2 m so that the bottom, opening and side surfaces of the container will be the landing area. It was checked whether the contents were leaked or not.
- the breaking strength was measured when the molded material attached to the opening of the pulp mold container was compressed from the side (load cell speed 20 mm / min). Then, as the evaluation of the easily separable and disposable property (easiness of the separation of the molded member from the pulp mold container), a case where the value was not more than 300 ON was rated as X, and a case where the value exceeded 300 N was rated as X.
- the shape accuracy of the thread portion is determined by the overrun torque test that indicates the tightness of the screw because a large effective tightening torque can be obtained if the desired effective screw shape is sufficiently obtained and the member has sufficient strength. evaluated.
- tightening was performed at a constant speed (5 wpm) and a constant indentation pressure (10 N), and the torque (Nm) at the time when the screw was destroyed was measured. Then, the case where the torque that led to the thread breakage was 30000 Nm or more was indicated by ⁇ , and the case where the torque was less than that was indicated by X.
- the sealing performance was evaluated by measuring the moisture permeability described below.
- Moisture permeability conforms to JISZ 208, pulp mold volume with opening outer diameter 0 36 mm, body outer diameter ⁇ 82 mm, outer surface area 700 cm 2 , volume 1 L
- the body of the vessel was covered with aluminum foil, and the opening was covered with aluminum foil so as not to cover the outer ring and contact ring.
- the opening was closed with a resin cap and used for the test. Note that the sealing agent Before closing, 10 g of calcium chloride was placed in a small dish and placed in the test body.
- a pulp mold container having waterproof and moisture-proof properties that can be provided with waterproof and moisture-proof properties using a smaller amount of raw materials than in the past.
- a pulp mold container having a water-repellent and moisture-proof property, which has a high defiberability of pulp fibers and is easy to reuse.
- a pulp mold container having a high barrier property against gas and liquid and having excellent storage stability of contents.
- the moisture permeability of the resin layer by controlling the moisture permeability of the resin layer, the occurrence of blisters between the molded body and the resin layer is effectively prevented.
- the resin layer uniformly has desired performance.
- a molded member formed from natural fibers and a binder to a pulp mold container, it is possible to impart hermeticity and durability to withstand repeated use, and to separate the two without separating them. Even when discarded, there is no risk of environmental pollution, and the work can be easily performed even when sorting.
- the molded member has a paper-like texture, and the user can easily recognize that the pulp fiber is used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020027004828A KR20020040878A (ko) | 1999-10-15 | 2000-10-02 | 펄프 몰드 용기 |
EP00963021A EP1221413A4 (en) | 1999-10-15 | 2000-10-02 | CONTAINER WITH FORMED PART FROM FIBER PULSE |
US10/110,715 US7048975B1 (en) | 1999-10-15 | 2000-10-02 | Pulp molded container |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29370699A JP3215690B2 (ja) | 1999-10-15 | 1999-10-15 | 複合容器 |
JP11/293706 | 1999-10-15 | ||
JP2000034024A JP2001219921A (ja) | 2000-02-10 | 2000-02-10 | パルプモールド成形体 |
JP2000-34024 | 2000-02-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001026978A1 true WO2001026978A1 (fr) | 2001-04-19 |
Family
ID=26559534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/006818 WO2001026978A1 (fr) | 1999-10-15 | 2000-10-02 | Recipient constitue d'un moule avec depot de pate |
Country Status (5)
Country | Link |
---|---|
US (1) | US7048975B1 (ja) |
EP (1) | EP1221413A4 (ja) |
KR (1) | KR20020040878A (ja) |
CN (1) | CN1378511A (ja) |
WO (1) | WO2001026978A1 (ja) |
Cited By (1)
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US20160236820A1 (en) * | 2012-11-13 | 2016-08-18 | Heineken Supply Chain B.V. | Container, preform assembly and method and apparatus for forming containers |
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- 2000-10-02 KR KR1020027004828A patent/KR20020040878A/ko not_active Application Discontinuation
- 2000-10-02 CN CN00814136A patent/CN1378511A/zh active Pending
- 2000-10-02 EP EP00963021A patent/EP1221413A4/en not_active Withdrawn
- 2000-10-02 US US10/110,715 patent/US7048975B1/en not_active Expired - Lifetime
- 2000-10-02 WO PCT/JP2000/006818 patent/WO2001026978A1/ja not_active Application Discontinuation
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160236820A1 (en) * | 2012-11-13 | 2016-08-18 | Heineken Supply Chain B.V. | Container, preform assembly and method and apparatus for forming containers |
US9714117B2 (en) * | 2012-11-13 | 2017-07-25 | Heineken Supply Chain B.V. | Container, preform assembly and method and apparatus for forming containers |
US10710771B2 (en) | 2012-11-13 | 2020-07-14 | Heineken Supply Chain B.V. | Container, preform assembly and method and apparatus for forming containers |
US11667435B2 (en) | 2012-11-13 | 2023-06-06 | Heineken Supply Chain B.V. | Container, preform assembly and method and apparatus for forming containers |
Also Published As
Publication number | Publication date |
---|---|
KR20020040878A (ko) | 2002-05-30 |
EP1221413A4 (en) | 2005-08-17 |
EP1221413A1 (en) | 2002-07-10 |
CN1378511A (zh) | 2002-11-06 |
US7048975B1 (en) | 2006-05-23 |
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