EP1914175A1 - Dichtungsstruktur für behälter und dafür verwendete kappe - Google Patents

Dichtungsstruktur für behälter und dafür verwendete kappe Download PDF

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Publication number
EP1914175A1
EP1914175A1 EP06782195A EP06782195A EP1914175A1 EP 1914175 A1 EP1914175 A1 EP 1914175A1 EP 06782195 A EP06782195 A EP 06782195A EP 06782195 A EP06782195 A EP 06782195A EP 1914175 A1 EP1914175 A1 EP 1914175A1
Authority
EP
European Patent Office
Prior art keywords
container
seal member
mouth portion
lid
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06782195A
Other languages
English (en)
French (fr)
Other versions
EP1914175A4 (de
Inventor
Akihito Miyazaki
Yasuyuki Takeuchi
Kenji Yoshihiro
Toshiki Sakaguchi
Naoto Matsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Seikan Group Holdings Ltd
Original Assignee
Toyo Seikan Kaisha Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Publication of EP1914175A1 publication Critical patent/EP1914175A1/de
Publication of EP1914175A4 publication Critical patent/EP1914175A4/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5883—Non-integral spouts connected to the package at the sealed junction of two package walls
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane

Definitions

  • the present invention relates to a sealing structure of a container which makes it easy to open and peel the seal member though it ensures high sealing property by sealing the mouth portion of a container with a seal member and by providing the container with a lid, and to a lid used for above container.
  • Patent Document 1 discloses retort plastic container in which the opening of the body of the container is sealed with an inner lid made of a plastic sheet by bonding the sheet with a bonding strength under which the sheet is more peelable from the container body, and an outer lid is covered on the inner lid and screw-fitted to the container body. According to the retort plastic container disclosed in Patent Document 1, it is reported that the inner lid with which the container is sealed is not peeled during retort sterilization treatment but can be peeled easily when the lid is opened.
  • Patent Document 2 discloses a pouch spout produced by thermally welding a seal member on the top panel of an pouring cylinder and by screw-fitting a cap, provided with a contact ring on its inside surface that is in direct contact with the top panel of the pouring cylinder.
  • the pouch spout disclosed in Patent Document 2 ensures that because the seal member is pressed by the contact ring and the sealing property of the seal member can be therefore improved, it is unnecessary to increase the adhesive strength of the seal member to a required level or more and the seal member can be easily opened and peeled when the content is poured from the pouch spout.
  • Patent Document 3 discloses a package bag with a mouth in which the outer periphery of a seal material is fused with the outside surface of the opening end of the mouth portion and the seal material that seals the opening end of the mouth portion is pressed by a dome-like projection disposed on the backside of a cap. According to the package bag with a mouth portion which is disclosed in Patent Document 3, the dome-like projection does not break the seal material but is in close contact with the seal material, making it possible to prevent water from penetrating into the upper surface of the seal material that seals the mouth portion at the time of heat treatment.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 6-219464
  • Patent Document 2 Japanese Patent Application Laid-Open No. No. 2002-104453
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2004-224355
  • the container of Patent Document No. 1 has the problem that though the inner lid made of a plastic sheet is pressed against the upper surface of the opening of the container by a packing made of silicone rubber that is disposed on the inside surface of the outer lid, the inner lid is peeled from the upper surface of the opening on the inner peripheral side of the upper surface of the opening when the pressure in the container is raised when the container is sterilized at high temperatures or when a impact of falling is applied and the inner lid is raised towards the inside of the outer lid against the elastic force of the packing of the packing.
  • this is undesirable because the content in the container enters into that part and there is a fear of giving a feeling of discomfort to purchasers when the container is opened.
  • the package bag with a mouth portion of Patent Document 3 is reduced in the fear of the above problem because the dome-like projection disposed on the backside of the cap is in direct contact with the inner peripheral side of the opening.
  • the present invention has been made in view of the above situation, and it is an object of the present invention to provide a sealing structure of a container which makes it easy to peel (opened peeling) a seal material when the container is opened while ensuring high sealing property by sealing the mouth portion of the container with the seal material and by providing the container with a lid, the structure enabling the container to prevent the seal material from peeling even if a impact of falling is applied or the pressure in the container is raised, and also to provide a lid used in this structure.
  • a sealing structure of a container according to the present invention includes heat-sealing a seal member to the upper end of the mouth portion of a container and fitting a lid to said mouth portion to thereby seal the inside of the container, wherein an inner peripheral projection that is positioned in the vicinity of a place inner than the inner periphery of said mouth portion and is in direct contact with said seal member is formed on the top panel of said lid.
  • Such a structure ensures high sealing property and also, makes it easy to open and peel the seal member. Further, it prevents the peeling of the sealing material on the inner periphery of the mouth portion of which peeling is caused by an impact of falling or a rise in the pressure in the container, with the result that a phenomenon that the content of the container enters into the space between the upper end surface of the mouth portion and the seal member can be effectively avoided.
  • the sealing structure of a container according to the present invention may take a structure in which said lid is provided with a cyclic projection that is in contact with the upper end surface of said mouth portion through said seal member on the inside surface of the top panel thereof.
  • Such a structure can prevent the seal member from being peeled caused by a rise in the pressure in the container more reliably and also can prevent sterilizing water used in high-temperature sterilization from penetrating between the lid and the seal member.
  • the sealing structure of a container according to the present invention may take a structure in which said lid is fitted to said mouth portion so as to form a clearance between said lid and said seal member.
  • Such a structure allows the seal member to be curved upward in the lid to absorb an increase in pressure when the internal pressure in the container is increased.
  • the sealing structure of a container according to the present invention may be one in which said lid is fitted to said mouth portion in a resealable manner. Such a structure makes it possible to reseal the container with the lid also after the container is opened.
  • the lid according to the present invention is one which is used in the aforementioned sealing structure of a container and fitted to the mouth portion of the container sealed with the seal material, is provided with a top panel covering said mouth portion and is provided with an inner peripheral projection that is positioned in the vicinity of a place inner than the inner periphery of said mouth portion and is in direct contact with said seal member on the inside surface of the top panel when it is fitted to the mouth portion.
  • the lid according to the present invention may have a structure provided with a cyclic projection that is in contact with the upper end surface of said mouth portion through said seal member on the inside surface of said top panel.
  • the mouth portion of a container is sealed with a seal member and a lid is fitted, thereby ensuring high sealing property and also making easy to open and peel the seal member, and further, it prevents the peeling of the sealing material on the inner periphery of the mouth portion by the inner peripheral projection formed on the inside surface of the top panel of the lid, with the result that a phenomenon that the content of the container enters into the space between the upper end surface of the mouth portion and the seal member can be effectively avoided.
  • Fig. 1 is a partially broken sectional view of a spout showing an embodiment in which the sealing structure of a container according to the present invention is applied to the pouch spout.
  • Fig. 2 is an enlarged sectional view of an essential part enclosed by the chain line in Fig. 1 .
  • a spout 1 shown in Fig. 1 has a spout body 10 provided with a boat-form portion 11 and an pouring cylinder 12 having a cylindrical form and extended upwards from the boat-form cylinder 12 and the upper end of an opening of the pouring cylinder 12 is heat-sealed with a seal member 13. Also, screw threads 14 for screw-fitting a cap 15 is formed on outside peripheral surface of the pouring cylinder 12 and provided with plural drain slits 14a in a peripheral direction.
  • the opening of the pouring cylinder 12 is sealed with the seal member 13 and the cap 15 is screw-fitted to the pouring cylinder 12 so as to cover the seal member 13. If the cap 15 is fitted to the pouring cylinder 12 by screw fitting in the above manner, this is preferable because the spout can be resealed by the cap 15 after opening.
  • the fitting means of the cap 15 is not limited to the above means.
  • the boat-form portion 11 contained in the spout body 10 is provided with a cylinder portion 11a connected to the pouring cylinder 12, three welded substrate 11b that project horizontally in a triangle form from this cylinder portion 11a so as to be almost symmetrical in the figure and a flange portion 11c positioned at the boundary between the pouring cylinder 12 and the cylinder portion 11a.
  • This welded substrates 11b are arranged at predetermined intervals along the direction of the center axis of the cylinder portion 11a and are connected in a vertical direction through a column portion 11d positioned at front end side. Also, a spout seal portion 35 of a pouch body 3 is heat-sealed with the entire periphery of the side surface of the welded substrate 11b as described later. At this time, the flange portion 11c is so devised that it is in direct contact with the side of the spout seal portion 35 and is aligned with a soft wrapping material forming the pouch body 3(see Fig. 4 ).
  • the spout body 10 and the cap 15 may be produced using a thermoplastic resin typified by a polyolefin resin such as polypropylene and polyethylene by a molding means such as injection molding.
  • the spout 1 is given as the example.
  • the present invention may be applied to various containers such as bottle type containers other than this spout 1.
  • the mouth portion of a bottle type container corresponding to the spout body 10 used in the above embodiment can be integrated with the container body by molding and besides the above polyolefin resins, various thermoplastic resins including polyethylene terephthalate and polyethylene naphthalate may be used.
  • the bottle type containers may be produced by direct blow molding or stretch blow molding, the mouth portion of the container may be allowed to take a desired shape when a preform is molded by injection molding prior to the blow molding in the case of stretch blow molding.
  • the cap and the mouth portion of the container may be produced using the same resins or by blending other thermoplastic resins or properly produced in known structures, for example, a multilayer structure using functional resins such as an oxygen barrier resin.
  • the seal member 13 heat-sealed to the upper end surface of the opening of the pouring cylinder 12 is, as shown in Fig. 3 , made of an almost circular film material and two projections 13a are formed and projected in radius directions opposite to each other. These projections 13a are formed as thumb arms making easy to peel the seal member 13 when the seal member 13 is opened and peeled. These projections are preferably formed in such a manner that when the cap 15 is fitted to the pouring cylinder 12, the projections 13a are bent along the inside surface shape of the cap 15 whereas when the cap 15 is taken off from the pouring cylinder 12, they recover its shape by their elasticity. It is to be noted that Fig. 3 is a plan view showing the condition that the upper end surface of the opening of the pouring cylinder 12 is heat-sealed with the seal member 13.
  • Examples of the film material used for the seal member 13 may include film materials having a multilayer structure in which a base material layer, an intermediate layer (barrier layer) and a sealant layer are laminated in this order through an adhesive layer.
  • the specific structure of the film material may be properly selected in consideration of the required tensile strength, resistance to an impact of falling, pinhole resistance, resistance to the content, gas barrier property and also, heat resistance when high temperature sterilization such as hot water sterilization and retort sterilization is required.
  • base material films superior in mechanical property such as tensile strength, resistance to the impact and pinhole resistance are preferably used for the base layer.
  • materials obtained by laminating biaxial oriented films made of, for example, polyester type resins such as polyethylene terephthalate, polyamide type resins such as nylon or polyolefin type resins such as polypropylene singly or plurally.
  • Such a base material film itself may be provided with barrier property according to the need by vapor-depositing, for example, a metal such as aluminum or an inorganic oxide such as alumina (aluminum oxide) and silica (silicon oxide), by coating this base material film with a barrier organic material such as polyvinylidene chloride and polyacrylic acid, or by blending an oxygen absorbing resin containing an oxidizing polymer or an oxygen absorber made of, for example, a reducing metal compound.
  • a metal such as aluminum or an inorganic oxide such as alumina (aluminum oxide) and silica (silicon oxide)
  • a barrier organic material such as polyvinylidene chloride and polyacrylic acid
  • synthetic resin films provided with barrier property that stands to various gases and steam may be used.
  • a synthetic resin film include an ethylene/vinyl alcohol copolymer film; vinylidene chloride copolymer film; crystalline polyamide film (Nylon MXD6) obtained by a polymerization condensation reaction between methaxylenediamine (MXDA) and adipic acid; acrylonitrile copolymer film; polyglycolic acid and its copolymer film; polyglycolic acid film; clay type nanocomposite synthetic resin film; inorganic film deposited film; films coated with a barrier organic material such as polyvinylidene chloride and polyacrylic acid; and films coated with, as a base, a clay type nanocomposite material such as a phenol resin, epoxy resin and polyimide resin.
  • These films may be blended with an oxygen absorbing resin containing an oxidizing polymer and an oxygen absorber made of, for example, a reducing metal compound.
  • an oxygen absorber made of, for example, a reducing metal compound.
  • a metal foil such as aluminum foil or steal foil may be used as other materials imparting barrier property.
  • the sealant layer it is demanded of the sealant layer to have heat-sealing property (which means that a subject material can be melted, diffused and resolidified at temperatures lower than the melting point of the material constituting at least the base material layer), heat-sealing strength, heat resistance (heat-sealing strength at high temperatures), resistance to contents and sanitary property.
  • Examples of the synthetic resin material having heat-sealing property adaptable to the sealant layer include polyolefin type resins such as low-density polyethylene, linear low-density polyethylene (Ziegler type (multisite catalyst) and metallocene type (single-site catalyst)), ethylene/ ⁇ -olefin copolymer, olefin copolymer graft-modified by ethylene type unsaturated carboxylic acid or its anhydride, middle-density polyethylene, high-density polyethylene, polypropylene, propylene/ethylene copolymer, polybutene-1, polymethylpentene, ethylene/vinyl acetate vinyl copolymer, ethylene/acrylic acid copolymer, ethylene/methacrylic acid copolymer, ion-crosslinked olefin copolymer (ionomer) obtained by introducing a metal ion into a part of a ethylene/methacrylic acid copolymer or the
  • copolymer polyesters obtained by modifying polyethylene terephthalate or polybutylene terephthalate with a polyvalent carboxylic acid component such as isophthalic acid and adipic acid or a polyhydric alcohol component such as 1,4-butanediol and 1,4-cyclohexanedimethanol are preferably used as the synthetic resin material used in the sealant layer. Easily peeling ability can be imparted to the sealant layer by blending an incompatible synthetic resin material such as polyethylene and polypropylene in such a copolymer polyester.
  • examples of materials used to form an adhesive layer that binds the above layers among them include polyurethane type resins such as a polyether type polyurethane resin and polyester type polyurethane resin, polyester type resins, epoxy type resins, acryl type resins and olefin type resins into which a polar group is introduced.
  • polyurethane type resins such as a polyether type polyurethane resin and polyester type polyurethane resin, polyester type resins, epoxy type resins, acryl type resins and olefin type resins into which a polar group is introduced.
  • synthetic films constituting each layer may be obtained by a usual method such as a casting method, T-die method, calendering method or inflation method. Then, the film material having a multilayer structure may be obtained by a usual method such as dry lamination method using a film molded in advance and a sandwich lamination method, lamination coating method or melt co-extrusion method using a molten resin.
  • the surface of each layer, which surface is in contact with the adhesive layer may be subjected to surface reforming treatment using corona discharge treatment, flame treatment, ultraviolet treatment, ozone treatment, primer coating treatment (coated with alkyl titanate, polyethyleneimine, a silane coupling agent, isocyanate type compound or a polyurethane type compound).
  • the cap 15 is provided with a top panel 15a that covers the opening of the pouring cylinder 12 and a thread groove 15b corresponding to a screw thread 14 of the pouring cylinder 12 is formed on the inside peripheral surface of a cylinder wall 15c descending from the peripheral end of the top panel 15a.
  • a cyclic projection 15d that is in contact with the upper end surface of the opening of the pouring cylinder 12 through the seal member 13 is formed on the inside surface of the top panel 15a.
  • the cyclic projection 15d is formed along the upper end surface of the opening of the pouring cylinder 12, such that the seal member 13 is pressed against the upper end surface of the opening of the pouring cylinder 12 by the cyclic projection 15d.
  • Such a structure ensures that even if the seal member 13 is raised upward along with a rise in the internal pressure, for example, in high-temperature sterilization or when an impact of falling is applied, it is possible to efficiently prevent the occurrence of a phenomenon that the seal member 13 is peeled from the upper end surface of the opening of the pouring cylinder 12 and the sealing property of the container (pouch) can be retained.
  • the seal strength of the seal member 13 is determined without the necessity for considering high-temperature sterilization after the content is filled and sealed and peeling during the distribution process and may be properly set, for example, to a range from 5 to 25 N/15 mm and particularly 15 N/15 mm or less by giving priority to easy peeling ability.
  • the seal strength is fixed to 23 N/15 mm or more according to the related law.
  • seal strength for the seal member 13 can be selected in the above range.
  • the cyclic projection 15d is designed to be in contact with the upper end surface of the opening of the pouring cylinder 12 through the seal member 13 and it is therefore possible to prevent sterilizing water from penetrating into the upper surface of the seal member 13.
  • a cyclic inner peripheral projection 15e located on the inner peripheral side of the cyclic projection 15d is formed concentrically together with the cyclic projection 15d on the inside surface of the top panel 15a of the cap 15.
  • This inner peripheral projection 15e is formed such that the tip side of the inner peripheral projection 15e is in contact with the seal member 13 when the cap 15 is fitted to the pouring cylinder 12.
  • this inner peripheral projection 15e is formed such that it has such a projected length allowing the tip thereof to be positioned below the horizontal plane including the upper end surface of the opening of the pouring cylinder 12 when the cap 15 is fitted to the pouring cylinder 12 (see Fig. 2 ).
  • the tip of the inner peripheral projection 15e is designed to be positioned below the horizontal plane including the upper end surface of the opening of the pouring cylinder 12, it is only required that the tip of the inner peripheral projection 15e is positioned on the horizontal plane including at least the upper end surface of the opening of the pouring cylinder 12 and is in contact with the seal member 13.
  • the inner peripheral projection 15e like this is formed. Therefore, when force that likely lifts the seal member 13 upwards arises along with a rise in the internal pressure, the inner peripheral projection 15e is pressed against the seal member 13 positioned in the vicinity of the inner periphery of the opening of the pouring cylinder 12 to thereby prevent the seal member 13 from peeling from the upper end surface of the opening at the inner periphery of the opening of the pouring cylinder 12.
  • the above cyclic projection 15d and inner peripheral projection 15e are formed for the following main purposes. Specifically, the above cyclic projection 15d prevents the whole peeling of the seal member 13 from the upper end surface of the opening whereas the inner peripheral projection 15e prevents the partial peeling of the seal member 13 at the inner periphery of the opening.
  • the inner peripheral projection 15e cannot prevent the occurrence of the phenomenon that the seal member 13 positioned in the vicinity of the inner periphery of the opening of the pouring cylinder 12 is lifted upwards when the internal pressure is increased, with the result that the function of preventing the peeling of the seal member 13 at the inner periphery of the opening of the pouring cylinder 12 is damaged.
  • the inner peripheral projection 15e must be formed between the inner periphery of the opening and a position distant about half the diameter of the opening of the pouring cylinder 12: specifically, at a position in the vicinity of a place inner than the inner periphery of the opening of the pouring cylinder 12 so as not to be too far from the inner periphery of the opening.
  • the inner peripheral projection 15e that is in contact with the seal member 13 is formed on the inside surface of the top panel 15a of the cap 15 to thereby prevent the seal member 13 positioned on the outer peripheral side than the inner peripheral projection 15e from being lifted over the upper end surface of the opening of the pouring cylinder 12.
  • the inner peripheral projection 15e is not limited to the above type having a cyclic form and may be one formed by arranging plural small projections cyclically insofar as the aforementioned function is obtained. Its specific structure may be modified properly to the extent that the aforementioned function is not damaged.
  • the example illustrated is so designed that a predetermined clearance 2 is formed between the cap 15 and the seal member 13 when the cap 15 is fitted to the pouring cylinder 12.
  • a predetermined clearance 2 is formed between the cap 15 and the seal member 13 when the cap 15 is fitted to the pouring cylinder 12.
  • Such a structure allows the seal member 13 to be curved upward in the cap 15 to absorb an increase in pressure when the internal pressure in the container is increased in high-temperature sterilization or when an impact of falling is applied, so that an impact applied to the seal member 13 when the internal pressure is increased is eased.
  • the spout 1 as mentioned above is fitted to a pouch body 3 as shown in Fig. 4 and used as a mouth that pours the content.
  • the pouch body 3 is constituted of a body portion 31 and a bottom portion 32 formed of a soft wrapping material such as a resin film.
  • the side periphery of the body portions 31 is sealed with a side seal 33 in the condition that the bottom portion 32 is folded at a fold line 32a and also, the body portion 31 and the bottom portion 32 are sealed with a bottom seal 34.
  • a slant portion 4 that is cut diagonally is formed at a corner portion on the upper left side in the figure.
  • a spout seal portion 35 of this slant portion 4 the entire periphery of the side surface of the welded substrate 11b of the spout 1 is heat-sealed with the soft wrapping material forming the pouch body 3.
  • Such a pouch with a spout is generally conveyed to a content-filling step in the condition that its top portion is opened and the top portion is sealed with a top seal 36 after the content is filled.
  • the spout 1 fitted as the pouring mouth has s structure in which the opening of the pouring cylinder 12 is sealed with the seal member 13 and the cap 15 is fitted to the pouring cylinder 12 so as to cover the seal member 13.
  • the seal strength of the seal member 13 is designed to be at such a level that the seal member 13 is easily peeled, the content can be filled and sealed highly tightly.
  • the seal member 13 is opened and peeled after the cap 15 is dismounted.
  • the seal member 13 can be heat-sealed at such a strength level that it is easily peelable. The seal member 13 can be therefore peeled and opened easily.
  • the inner peripheral projection 15e is formed, together with the cyclic projection 15d that is in contact with the upper end surface of the opening of the pouring cylinder 12 through the seal member 13, on the side inner than the cyclic projection 15d on the inside surface of the top panel 15a of the cap 15.
  • the above cyclic projection 15d may be omitted according to the need.
  • the container to which the present invention may be applied is not limited to a pouch as those mentioned above.
  • the present invention may be applied to, for example, a squeeze bottle to be filled with a content such as mayonnaise or a wide-mouth container to be filled with a content such as jam.
  • the present invention is preferably used for containers, such as a pouch and squeeze bottle, made of flexible materials which are largely deformed and allow a large increase in internal pressure when an impact of falling is applied and a person in charge grasps these containers strongly during the distribution process.
  • the present invention provides a sealing structure of a container which makes it easy to open and peel a seal member while securing high sealing property by sealing the mouth portion of the container with the seal member and by providing the container with a lid, whereby the present invention may be utilized in various containers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Bag Frames (AREA)
EP06782195A 2005-08-09 2006-08-02 Dichtungsstruktur für behälter und dafür verwendete kappe Withdrawn EP1914175A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005230687A JP5002924B2 (ja) 2005-08-09 2005-08-09 容器の密封構造、及びこれに用いる蓋体
PCT/JP2006/315326 WO2007018101A1 (ja) 2005-08-09 2006-08-02 容器の密封構造、及びこれに用いる蓋体

Publications (2)

Publication Number Publication Date
EP1914175A1 true EP1914175A1 (de) 2008-04-23
EP1914175A4 EP1914175A4 (de) 2010-12-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06782195A Withdrawn EP1914175A4 (de) 2005-08-09 2006-08-02 Dichtungsstruktur für behälter und dafür verwendete kappe

Country Status (6)

Country Link
US (1) US20090120935A1 (de)
EP (1) EP1914175A4 (de)
JP (1) JP5002924B2 (de)
KR (1) KR101351218B1 (de)
CN (1) CN101184675B (de)
WO (1) WO2007018101A1 (de)

Cited By (3)

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NL1037405C2 (en) * 2009-10-16 2011-04-19 Ppg Industries Inc Pouch for paint colourant.
WO2013125941A1 (en) * 2012-02-21 2013-08-29 N.V. Nutricia Container with sealing lid construction

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JP7340909B2 (ja) * 2018-05-30 2023-09-08 株式会社吉野工業所 スクイズ容器用キャップ
JP2020026302A (ja) * 2018-08-16 2020-02-20 カゴメ株式会社 シール蓋、容器、及び容器詰め飲食品の製造方法
CH715533A1 (de) * 2018-11-09 2020-05-15 Alpla Werke Alwin Lehner Gmbh & Co Kg Kunststoffbehälter mit einem Behälterhals mit einer Ausgiessöffnung und Verfahren zur Herstellung eines aus einem Preform gefertigten Kunststoffbehälters.

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Publication number Priority date Publication date Assignee Title
EP1958888A1 (de) * 2007-02-18 2008-08-20 PP.H. Prymat Sp.Z o.o Verpackung für schüttfähige Lebensmittel
NL1037405C2 (en) * 2009-10-16 2011-04-19 Ppg Industries Inc Pouch for paint colourant.
WO2011045329A1 (en) * 2009-10-16 2011-04-21 Ppg Europe B.V. Pouch for paint colourant
WO2013125941A1 (en) * 2012-02-21 2013-08-29 N.V. Nutricia Container with sealing lid construction

Also Published As

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KR20080033255A (ko) 2008-04-16
JP2007045443A (ja) 2007-02-22
US20090120935A1 (en) 2009-05-14
CN101184675B (zh) 2011-05-25
JP5002924B2 (ja) 2012-08-15
CN101184675A (zh) 2008-05-21
KR101351218B1 (ko) 2014-01-13
WO2007018101A1 (ja) 2007-02-15
EP1914175A4 (de) 2010-12-15

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