WO2014157364A1 - Sealing plate, sealing method, and container - Google Patents

Sealing plate, sealing method, and container Download PDF

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Publication number
WO2014157364A1
WO2014157364A1 PCT/JP2014/058594 JP2014058594W WO2014157364A1 WO 2014157364 A1 WO2014157364 A1 WO 2014157364A1 JP 2014058594 W JP2014058594 W JP 2014058594W WO 2014157364 A1 WO2014157364 A1 WO 2014157364A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
sealed
heat
container
seal
Prior art date
Application number
PCT/JP2014/058594
Other languages
French (fr)
Japanese (ja)
Inventor
隆洋 石黒
優信 大島
Original Assignee
出光ユニテック株式会社
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 出光ユニテック株式会社 filed Critical 出光ユニテック株式会社
Publication of WO2014157364A1 publication Critical patent/WO2014157364A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • 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
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/325—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil
    • B65D75/326—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet being recessed, and the other being a flat not- rigid sheet, e.g. puncturable or peelable foil and forming one compartment
    • 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
    • B65D75/5855—Peelable seals
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being elliptical
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/246—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines forming figures, e.g. animals, flowers, hearts
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • 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
    • B65D2575/00—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
    • B65D2575/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by association or interconnecting two or more sheets or blanks
    • B65D2575/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D2575/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D2575/3209—Details
    • B65D2575/3218—Details with special means for gaining access to the contents
    • B65D2575/3245—Details with special means for gaining access to the contents by peeling off the non-rigid sheet

Definitions

  • the present invention relates to a sealing board, a sealing method, and a container.
  • both sealing and unsealing properties are required.
  • a container that uses a multi-layer container as a container and has a surface between the surface layer of the multi-layer container and a layer in contact with the unsealed peel surface is known instead of performing unsealing at the time of use by generally removing the seal surface. It has been.
  • by making the multilayer structure into a layer structure using a specific resin it is possible to stabilize the peeling strength at the time of opening, and various containers that achieve both sealing (fusion) and opening properties. Have been proposed (Patent Documents 1 to 4).
  • the container is required to have various layer structures depending on the application, the multilayer structure of the container cannot necessarily be a layer structure using the specific resin described in Patent Documents 1 to 4, and various containers are used.
  • it has been difficult to achieve both fusion and easy peelability between the container body and the lid.
  • an object of the present invention is to provide a sealing plate, a sealing method, and a container that can be heat-sealed while achieving both fusion and easy peelability.
  • the term “sealing board” refers to a board-like instrument that is welded by applying pressure and temperature to the surface to be sealed.
  • a to-be-heeled object is not specifically limited, For example, it can use for welding of a container and a cover material.
  • the seal disc of the present invention is a seal disc provided with a base portion and an annular seal portion on one surface thereof, and the seal portion is a flat portion having a plane parallel to the surface to be sealed on the inner peripheral side. And a separating portion that is provided continuously with the plane portion and is spaced from the surface to be sealed toward the outer peripheral side.
  • the seal portion can be sufficiently pressed against the surface to be sealed, and a heat seal with high fusion property can be obtained.
  • the separation portion is provided so as to be separated from the surface to be sealed toward the outer peripheral side of the seal portion, the resin is gently applied to the heat seal portion corresponding to the separation portion according to the pressing force by the separation portion. Can be moved. Thereby, it can suppress that the resin pool is formed in the to-be-sealed surface.
  • the object to be sealed is a laminated structure of three or more layers, it is possible to suppress the formation of a resin pool in a layer below the layer to be fused by heat sealing of the object to be sealed.
  • the plane parallel to the surface to be sealed is not only parallel to the surface to be sealed, but also substantially parallel to the extent that it does not lose its fusing property during heat sealing.
  • the separation portion is a slope inclined in a direction away from the surface to be sealed toward the outer peripheral side of the seal portion.
  • the separating portion is inclined in the direction away from the sealed surface toward the outer peripheral side of the seal portion, the pressing force at the time of heat sealing becomes smaller toward the outer peripheral side. Therefore, it can suppress that resin moves gently toward the outer peripheral side of a seal
  • the said plane part has a convex curved surface formed in the end edge of the inner peripheral side of the said seal part toward the said to-be-sealed surface.
  • the edge on the inner peripheral side of the flat portion has a convex curved surface, when the flat portion is pressed against the surface to be sealed and heat sealed, the pressing force is applied to the inner peripheral side edge of the flat portion. Will not concentrate. Therefore, it can be prevented that the sealed surface corresponding to the end portion on the inner peripheral edge side is excessively heat-sealed and the seal strength is partially increased or damaged. As a result, it is possible to prevent inconvenience that the heat-sealing fusing property and peelability are not uniform and the problem that the pressing force is concentrated and the object to be sealed is cut.
  • the seal portion is provided with a peeling start end forming portion adjacent thereto, and the peeling start end forming portion has a shape protruding from the outer peripheral edge of the seal portion toward the outer peripheral direction. Preferably it is formed.
  • the peeling start end forming portion since the peeling start end forming portion is provided adjacent to the seal portion, the peeling start end can be formed in one operation when the heat seal is formed. Further, in the present invention, by forming the peeling start end forming portion in a shape protruding from the outer peripheral edge of the seal portion toward the outer peripheral direction, a protruding portion corresponding to the protruding shape is also formed on the sealed surface.
  • the protruding shape is not particularly limited as long as it is a shape provided to protrude from the outer peripheral edge of the seal portion toward the outer peripheral direction, and examples thereof include a circular shape and a polygonal shape.
  • the peeling start end forming portion may be provided integrally with the seal portion, or may be provided as a separate body from the seal portion.
  • the said peeling start end formation part consists of a plane in which the surface pressed by the to-be-sealed surface is parallel with the to-be-sealed surface.
  • the resin of the heat seal portion is extruded during sealing, and the outer edge of the peeling start end forming portion is A resin reservoir can be formed on the surface to be sealed corresponding to.
  • the sealing method of the present invention is a sealing method in which a container body having a flange portion formed to extend to the outer peripheral edge of an opening and a lid member are heat-sealed by the flange portion, and the present invention
  • the sealing board according to any one of the above is pressed against the flange portion through the lid member and heat-sealed.
  • the heat sealing portion corresponding to the separation portion of the sealing portion is subjected to the pressing force by the separation portion, The resin can be moved gently, and the formation of the resin reservoir can be suppressed.
  • the container body and the lid member may be further heat-sealed on the outer peripheral side of the portion heat-sealed by the seal plate of the flange portion by an annular outer seal plate. preferable.
  • the container body has a laminated structure including at least two layers of a surface layer to be heat-sealed with a lid member and a surface layer adjacent to the surface layer in the flange portion,
  • the material constituting the surface lower layer preferably has a loss tangent tan ⁇ at 165 ° C. of less than 0.18.
  • the resin in the lower and lower layers moves slowly during heat sealing, and a resin pool is formed. Hateful.
  • the resin can be moved to a heat sealing portion corresponding to a separation portion of the sealing portion at the time of heat sealing. This can further suppress the formation of a resin reservoir. Therefore, for example, in the container body, when the surface layer and the surface lower layer are provided so as to be capable of delamination, when the container is opened by peeling the surface layer, it is possible to eliminate the inconvenience that it is difficult to open by being trapped in the resin reservoir, A container with high openability and good opening feeling can be obtained.
  • the container of the present invention comprises a container main body having a flange portion formed to extend to the outer peripheral edge of the opening, and a lid, and was heat-sealed by the sealing method according to any one of the present invention. It is characterized by.
  • the container body having the flange portion formed to extend to the outer peripheral edge of the opening and the lid material are heat sealed by the sheet method of the present invention.
  • the resin can be moved to the heat seal portion corresponding to, and the formation of the resin reservoir can be suppressed. Thereby, the inconvenience that it is difficult to be opened due to being caught in the resin reservoir can be solved, and a container having high openability can be obtained.
  • the flange portion is provided with an annular cut in a layer heat-sealed with the lid member.
  • the lid material can be easily peeled off from the flange portion, and the openability of the container is improved. it can.
  • board in one Embodiment of this invention The top view which looked at the sealing board of FIG. 1 from the one surface side in which the sealing part was provided. The elements on larger scale of the sealing board of FIG.
  • the fragmentary sectional view which showed the state of the heat seal by the sealing board of FIG. The schematic of the container in one embodiment of the present invention. Schematic which shows the state which opened the cover material in the container of FIG.
  • the structure used for the heat seal at the time of manufacture of a container is illustrated as a sealing board of this invention, it is not this limitation.
  • the sealing disk 1 is used for heat sealing the container 2, and heat seals the lid member 30 to the sealed surface 231 of the container body 20.
  • the seal disc 1 includes an annular seal portion 1A, a peeling start end forming portion 1B, and a base portion 1C.
  • substrate 1 is not specifically limited, For example, it can select from the metal which has heat conductivity, such as aluminum, iron, copper, or these alloys suitably.
  • the thickness and shape of the base portion 1C are not particularly limited, and those appropriately changed according to the sealing device can be suitably used.
  • the ring-shaped seal portion 1A can be appropriately changed according to the target heat seal shape such as a circular shape, an elliptical shape, a polygonal shape, a gourd shape, a tear shape, a star shape, and various character shapes.
  • the seal portion 1 ⁇ / b> A is provided so as to contact the lid member 30 that is heat-sealed to the container body 20 of the container 2.
  • the seal portion 1A is formed so that the inner peripheral side of the ring is parallel to the member to be heat sealed, and the outer peripheral side is formed in contact with the member to be heat sealed later than the inner peripheral side.
  • a flat portion 11 having a plane parallel to the sealed surface 231 is formed on the inner peripheral side of the ring.
  • the cross section is an inclined surface that is continuous with the flat surface portion 11 and inclines in a direction away from the sealed surface 231 toward the ring-shaped outer peripheral side of the seal portion 1A.
  • a spacing portion 12 is formed.
  • the planar portion 11 is formed with a convex curved surface 111 having a convex shape toward the sealed surface 231 by rounding the edge on the inner peripheral side of the seal portion 1A.
  • the separation portion 12 is preferably formed with a width of 0.2H or more and 0.8H or less with respect to the width H of the cross section of the seal portion 1A. More preferably, it is 0.4H or more and 0.6H or less. If the width of the separation portion 12 is smaller than 0.2H, the amount of resin that is pressed by the flat portion 11 and flows to the outer peripheral side increases, and the width of the separation portion 12 that comes into contact with the flat portion 11 with a delay is too small. It becomes difficult to gently move the resin to the heat seal portion 23 corresponding to the separation portion 12.
  • the width H is not particularly limited, and for example, 0.8 mm to 3.0 mm, more preferably 0.9 mm to 2.5 mm, and particularly preferably 1 mm to 2 mm are preferably used.
  • the inclination angle ( ⁇ ) formed from the inner peripheral side toward the outer peripheral side varies depending on the width H that is the width of the seal portion 1 ⁇ / b> A.
  • the portion 11 that is, with respect to the plane Y to be the sealed surface 231 as shown in FIG. 3, it is 2 ° to 20 °, preferably 3 ° to 15 °, more preferably 6 ° to 10 °. It is preferable to set as follows. If the inclination angle of the separation portion 12 is smaller than 2 °, even if the seal portion 1A is pressed during heat sealing, the space between the sealed surface 231 and the separation portion 12 is not sufficient, and the plane portion 11 is delayed.
  • the separation portion 12 presses the sealed surface 231 almost simultaneously and the resin cannot flow to the heat seal portion 23 corresponding to the separation portion 12.
  • the resin reservoir is easily formed in the vicinity of the outer peripheral edge of the heat seal portion 23, and this resin reservoir is caught when the obtained container 2 is opened, and the resistance at the time of peeling increases at the outer peripheral edge of the heat seal portion 23. It becomes difficult to smoothly open the container 2.
  • the angle of the spacing portion 12 exceeds 20 °, the periphery of the boundary A is sharply sharpened, and the lid member 30 may be cut during heat sealing or may be deformed to impair easy-openability. There is.
  • the convex curved surface 111 formed in the plane part 11 can prevent that the edge of the inner peripheral side of the plane part 11 breaks and cut
  • the curvature radius R of the convex curved surface 111 is not particularly limited.
  • the peeling start end forming portion 1B is adjacent to a part of the seal portion 1A, and is provided in a shape protruding from the outer peripheral edge of the seal portion 1A toward the outer peripheral direction of the ring.
  • the planar shape of the peeling start end forming portion 1B is not particularly limited, but is particularly limited as long as it has a shape that gradually decreases in width toward the outer peripheral direction, or a shape having a tip-like portion that is locally applied when opened. Not.
  • the protruding tip-like portion has a polygonal shape such as a triangle or a square.
  • the peeling start end forming portion 1B has a flat surface portion 13 parallel to the surface to be sealed 231. The flat surface portion 13 is provided on the same plane as the flat surface portion 11 of the seal portion 1A. Yes.
  • FIG. 6 is a schematic view showing an aspect of the container 2 manufactured using the seal board 1 of the present embodiment.
  • the container 2 includes a container body 20 and a lid member 30, the lid member 30 is placed on the opening 21 of the container body 20, and a flange portion 22 disposed on the periphery of the opening 21 of the container body 20. And the lid member 30 are heat-sealed by the sealing disk 1 to form an annular heat-seal portion 23 and a peeling start portion 25 as an opening start end, and as shown in FIG. Is done. On the other hand, as shown in FIG. 7, the sealed container 2 is opened by pulling up the lid member 30 from the peeling start portion 25 provided in the container 2.
  • the container body 20 includes a circular opening 21 that opens upward, and a flange portion 22 that is formed at the periphery of the opening 21.
  • a container body 20 is obtained by molding a multilayer sheet 10 composed of at least two layers of a surface layer 211 and a surface lower layer 212.
  • the surface layer 211 is the innermost layer of the container body 20, and the sealed surface 231 ⁇ / b> A on the lid member 30 side is sealed by the lid member 30 at the flange portion 22, and the annular heat seal portion 23 and the outside of the heat seal portion 23.
  • a peeling start portion 25 formed so as to protrude from the peripheral edge toward the outer peripheral direction of the ring is formed.
  • a cut 24 is formed along the inner peripheral end of the heat seal portion 23. The depth of the cut 24 is not particularly limited, but in the present embodiment, the depth reaches a surface lower layer 212 described later.
  • the heat seal part 23 of the container main body 20 after heat sealing does not have a bump-shaped resin reservoir and has a substantially flat surface. Since the heat seal part 23 is heat-sealed with a small pressing force toward the outer peripheral side by the separation part 12 inclined toward the outer peripheral side of the seal part 1A, the surface layer 211 of the container body 20 in the heat seal part 23, the surface The resin of the lower layer 212 gently flows toward the outer peripheral side. Therefore, the heat seal portion 23 is substantially flat, and a bump-shaped resin reservoir is hardly formed on the outer peripheral edge of the heat seal portion 23. Therefore, when opening the container 2, there is no inconvenience that the container 2 is caught by the resin reservoir and is difficult to open.
  • the peeling start portion 25 has a bump-shaped resin reservoir 251 formed by the surface layer 211 of the container body 20 on the outer edge of the flange portion 22 of the container body 20.
  • the surface layer 211 is a layer that comes into contact with the contents and is heat-sealed with the lid 30 when the multilayer sheet 10 is molded into the shape of the container body 20. Although details will be described later, the portion heat-sealed with the lid member 30 is peeled from the container body 20 together with the lid member 30.
  • a material to be heat-sealed with the lid member 30 preferably a polyolefin resin is suitably used.
  • polypropylene resins such as homopolypropylene (HPP), random polypropylene (RPP) and block polypropylene
  • polyethylene resins such as high density polyethylene (HDPE) and low density polyethylene (LDPE), linear ethylene- An ⁇ -olefin copolymer or the like is used.
  • the lower surface layer 212 is adjacent to the surface layer 211 and constitutes the lower layer of the surface layer 211, is a main layer of the multilayer sheet 10, and is a layer that appears on the outer surface of the container body 20.
  • the surface lower layer 212 is delaminated with the surface layer 211 when the container 2 is opened.
  • the material constituting the lower layer 212 preferably has a loss tangent tan ⁇ value at 165 ° C. of less than 0.18. More preferably, the value of the loss tangent tan ⁇ at 165 ° C. is 0.10 or less, particularly preferably 0.07 or less.
  • the value of the loss tangent tan ⁇ at 165 ° C. of the upper and lower layers 212 is less than 0.18, when the multilayer sheet 10 is heat-sealed, the resin of the lower and lower layers 212 moves slowly and it is difficult to form a resin pool.
  • the container body 20 is formed from the multilayer sheet 10 having the upper and lower layers 212.
  • the resin is loosened to the heat seal portion 23 corresponding to the separating portion 12 of the seal portion 1A during heat sealing. It can be made to move to, and it can further suppress that a resin pool is formed.
  • the value of the loss tangent tan ⁇ at 165 ° C. of the lower surface layer 212 is not particularly problematic as long as it is less than 0.18, but can be more suitably used if it is 0.01 or more.
  • the value of the loss tangent tan ⁇ at 165 ° C. it is possible to suppress the formation of a resin reservoir, and it is possible to appropriately delamination and to obtain high sealing performance, the heat seal adhesive strength It can be.
  • the measuring method and measuring device for loss tangent tan ⁇ is a dynamic viscoelasticity measuring device (DMS).
  • DMS dynamic viscoelasticity measuring device
  • the material is composed of at least one selected from the group of olefin resin, polystyrene resin, and polyester resin.
  • olefin resin specifically, polypropylene, polyethylene, and the like are used.
  • polypropylene is preferably used because it is widely distributed and easily available, is inexpensive, and has high strength.
  • polystyrene-based resin include general-purpose transparent and rigid GP grade polystyrene and impact-resistant HI grade polystyrene, and particularly required when HI grade polystyrene is used as a container. It is preferably used from the viewpoint of impact resistance.
  • polyester resin specifically, amorphous polyester, crystalline polyester, or the like is used, and amorphous polyester is particularly preferably used for reasons of processability.
  • a polymer containing at least part of a propylene unit hereinafter referred to as a polypropylene resin, and appropriately referred to as PP
  • a polyethylene resin a polymer containing at least part of an ethylene unit
  • PP 30% by mass or more and 99% by mass or less: 1% by mass or more and 70% by mass or less.
  • mass ratio PP / PE is smaller than 0.67, there is a possibility that a resin pool is generated at the time of heat-sealing to cause a problem of unsuccessful opening.
  • the polypropylene resin is specifically selected from any of four types of homopolypropylene, random polypropylene, block polypropylene, and mixtures thereof. And when heat resistance is considered, it is preferable in order of a homo polypropylene, a block polypropylene, and a random polypropylene. Moreover, when considering the sealing properties with other layers, random polypropylene, block polypropylene, and homopolypropylene are preferable in this order.
  • Specific examples of the polyethylene-based resin include high-density polyethylene and low-density polyethylene. Particularly, low-density polyethylene is preferably used for reasons of molding process stability.
  • an inorganic filler such as talc may be added to the front and lower layers 212.
  • the upper and lower layers 212 are formed so as to be directly adjacent to the surface layer 211, but the surface layer 211 does not flow due to heat sealing such as an adhesive layer between the surface layer 211 and the surface layer 212.
  • a thin layer may be provided.
  • a method for producing the multilayer sheet 10 before forming as a container a method such as co-extrusion, dry lamination, extrusion lamination, extrusion coating, or a combination of these methods can be employed.
  • the adhesive strength of each layer can be adjusted with the thickness of each layer, resin selection, a mixture ratio, etc.
  • the thickness dimension of the flange portion 22 of the container body 20 is preferably 200 ⁇ m or more and 2000 ⁇ m or less, more preferably 250 ⁇ m or more and 1500 ⁇ m or less, and particularly preferably 300 ⁇ m or more and 1200 ⁇ m or less.
  • the thickness of the flange portion 22 is less than 200 ⁇ m, there is a risk that the rigidity of the container is lowered.
  • the thickness is greater than 2000 ⁇ m, it is difficult to say that the container is a thin container, and a lot of materials are required and the manufacturing cost is increased. Since there is a possibility of causing a disadvantage that (raw material cost) increases, it is preferably set in the above range.
  • the lid member 30 is made of a multilayer film composed of at least two layers: an outer layer 311 that appears outside the container 2, a surface layer 211 of the container body 20, and a seal layer 312 that is heat-sealed.
  • the surface layer 211 of the container body 20 and the seal layer 312 of the lid member 30 to be heat-sealed have a delamination strength between the surface layer 211 and the sealing layer 312 rather than a delamination strength between the surface layer 211 and the surface lower layer 212. Is provided to be stronger.
  • the constituent material of such a sealing layer 312 depends on the material of the surface layer 211 and the upper and lower layers 212, but is random polypropylene (RPP), block polypropylene (BPP), linear low density polyethylene (LLDPE), polyethylene, etc. Can be used.
  • RPP random polypropylene
  • BPP block polypropylene
  • LLDPE linear low density polyethylene
  • polyethylene etc. Can be used.
  • a biaxially stretched polypropylene film (OPP), a biaxially stretched polyethylene terephthalate film (OPET), a biaxially stretched nylon film (ONy), etc. can be used.
  • thermal lamination, dry lamination, or the like can be employed.
  • the surface layer 211 and the surface lower layer 212 are used for the container body 20 and the sealing layer 312 is used for the lid member 30 and both are heat sealed, the surface layer 211 and the sealing layer 312 are melted.
  • delamination occurs between the surface layer 211 and the surface lower layer 212 of the container body 20 which is weak against stress, and the opening is performed well.
  • the heat seal between the flange portion 22 of the container main body 20 and the lid member 30 is performed by superimposing the lid member 30 on the flange portion 22 of the container main body 20. This is implemented by pressing the sealing board 1 in the direction of the arrow in FIG. More specifically, as shown in FIG. 5, first, the flat surface portion 11 of the seal board 1 is brought into contact with the lid member 30. At this time, the inner peripheral edge of the flat surface portion 11 is in contact with the outer peripheral side of the notch 24 provided in the container main body 20. Subsequently, the separation portion 12 formed on the outer peripheral edge side of the boundary A gradually contacts the lid member 30 from the inner circumference side and presses the lid member 30 and the container body 20.
  • the resin reservoir X is, for example, abruptly pressed by a conventional sealing disk whose pressing surface is a plane parallel to the flange portion, so that the resin of the lower and lower layers 212 is first removed from the outer edge of the heat seal portion 23. It is extruded toward the outer peripheral direction of the flange portion, and is formed into a bump shape so as to involve the surface layer 211 and the sealing layer 312 of the lid member 30.
  • the lid material When opening the container, the lid material is opened by turning it toward the inner peripheral direction of the flange portion.
  • the bump-shaped resin reservoir X is the outer peripheral direction of the flange portion opposite to the opening direction.
  • the surface layer 211 and the seal layer 312 to be peeled are formed, the inconvenience of being caught by the resin reservoir and difficult to open arises.
  • the bump-shaped resin reservoir X is not uniformly formed in the flange portion 22, and varies in presence or absence and size. Therefore, in the container 2 in which the resin reservoir X is formed, there arises a disadvantage that a stable opening property cannot be obtained.
  • the sealing method according to the present embodiment heat sealing is performed using the sealing disk 1, so that the resin of the upper and lower layers 212 of the container body 20 flows gently toward the outer peripheral side of the heat sealing portion 23.
  • a resin reservoir is hardly formed on the outer peripheral edge of the seal portion 23. Therefore, it is difficult to cause the inconvenience that it is difficult to open the container 2 by being caught in the resin reservoir, and the opening property can be improved.
  • the sealing method in the present embodiment since the resin reservoir is not easily formed, the disadvantage that stable opening performance cannot be obtained due to the presence or absence of the resin reservoir in the container 2 and the size variation can be solved. .
  • the container body 20 is formed from the multilayer sheet 10.
  • the resin constituting the upper and lower layer 212 has a loss tangent tan ⁇ value of less than 0.18 at 165 ° C., and the resin constituting the lower and lower layer 212 moves slowly during heat sealing. Therefore, the resin reservoir is difficult to be formed.
  • the container body 20 having the upper and lower layers 212 is heat-sealed in addition to the use of the sealing plate 1, so that a resin reservoir is more difficult to be formed.
  • the peeling start portion 25 is formed by pressing the peeling start end forming portion 1B against the container body 20 and the lid member 30 simultaneously with the seal portion 1A.
  • the resin of the surface layer 211 of the container body 20 is pushed to the outer peripheral side of the container 2 by being pressed by the flat surface portion 13 of the peeling start end forming portion 1B, that is, the position where the outer edge of the peeling start end forming portion 1B is in contact.
  • a resin reservoir 251 is formed near the outer edge of the peeling start portion 25.
  • the surface layer 211 of the container body 20 and the seal layer 312 of the lid member 30 are heat-sealed with the resin reservoir 251 formed, and both are fused.
  • the sealing temperature may be appropriately determined depending on the type of material to be heat sealed, but is higher than the melting temperature of the surface layer 211, generally about 160 ° C. or higher and 240 ° C. or lower. Preferably, the temperature may be 180 ° C. or higher and 220 ° C. or lower.
  • the sealing pressure is preferably about 0.98 Pa to 7.845 Pa (10 kg / cm 2 to 80 kg / cm 2 ), more preferably 1.96 Pa to 6.86 Pa (20 kg / cm 2 to 70 kg / cm 2). cm 2 or less), more preferably 25 Pa or more and 60 Pa or less.
  • the pressing force is weaker than 0.98 Pa, there is a possibility that heat sealing cannot be performed sufficiently. Even if the pressing force is higher than 7.845 Pa, there is no great difference in the heat sealing between the sealing layer 312 and the surface layer 211, and the pressing energy Therefore, the above range is set.
  • FIG. 11 In order to prevent such a situation, after the seal layer 312 of the lid member 30 is heat-sealed to the surface layer 211 of the flange portion 22 by the seal disc 1, using the annular outer peripheral seal disc 100 (FIG. 11), What is necessary is just to press the surface layer 211 of the container main body 20 and the sealing layer 312 of the lid
  • the sealing surface of the outer peripheral sealing board may be smooth, but may be a surface capable of partial adhesion such as knurling so as not to impair easy-openability.
  • the planar portion 11 parallel to the sealed surface 231 on the inner circumferential side of the annular sealing portion 1A and the planar portion 11 are continuous from the sealed surface 231 toward the outer circumferential side. And a spacing portion 12 that is inclined in the direction to be moved. Thereby, in the plane part 11, a heat seal with high fusion property is obtained. On the other hand, since the pressing force decreases toward the outer peripheral side in the separation portion 12, it is possible to prevent the resin from slowly moving to the heat seal portion 23 corresponding to the separation portion 12 and forming a resin pool. .
  • the convex curved surface 111 is provided on the inner peripheral edge of the seal portion 1A, the pressing force concentrates on the inner peripheral edge even when the seal portion 1A is pressed against the object to be sealed. It is possible to prevent the lid member 30 from being cut.
  • the peeling start end forming portion 1B is provided on the seal board 1 and protruded from the outer peripheral edge of the seal portion 1A toward the outer peripheral direction, the peeling start portion 25 formed thereby also has a protruding shape. It is formed. Since stress concentrates on the projecting start portion 25 of the protruding shape when opening, it can be opened with a small force, and the opening property of the container 2 can be improved.
  • the container body 20 was molded using the multilayer sheet 10. In the multilayer sheet 10, since the value of the loss tangent tan ⁇ at 165 ° C.
  • the resin of the front and lower layers 212 moves slowly and the resin pool is moved when the container body 20 is heat sealed. Hard to be formed. Therefore, it is possible to further suppress the formation of a resin reservoir in the container body 20 in combination with the heat sealing by the sealing board 1.
  • the separating portion 12 is an inclined surface that is inclined in a direction away from the sealed surface 231, but is not particularly limited as long as it has a shape that is separated from the sealed surface toward the outer peripheral side of the sealing portion 1 ⁇ / b> A.
  • shapes such as a convex curved surface shape and a concave curved surface shape can also be used.
  • the notch 24 is formed along the inner peripheral edge of the heat seal portion 23 in the flange portion 22, but the thickness of the surface layer 211 is set to 1 / th of the thickness of the surface layer 211 before molding instead of the notch 24. It is good also as a thin part made into 2 or less (more preferably 1/5 or less).
  • the shape of the container was planar circle shape, it is not restricted to this, A planar rectangular shape and another shape may be sufficient.
  • the multilayer sheet 10 shall consist of a multilayer film which consists of 2 layers of the surface layer 211 and the surface layer 212, the multilayer sheet 10 is provided with the at least 2 layer of the surface layer 211 and the surface layer 212. What is necessary is just to enter, and it may consist of a multilayer film which consists of three or more layers.
  • the container of the present invention can be suitably used as a container for contents such as foods, medicines and cosmetics.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
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  • Packages (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)

Abstract

This sealing plate (1), which is provided with a base (1C) and a circular sealing section (1A) on one surface thereof, is characterized in that the sealing section (1A) is equipped with: a level section (11), which has a level surface parallel to the surface (231) to be sealed, on the inner circumferential side; and a separated section (12), which is continuous with the level section (11) and is separated from the surface (231) to be sealed, towards the outer circumferential side. Meanwhile, this sealing method is a sealing method for heat-sealing a container body (20), which has a flange section (22) formed so as to extend from the peripheral edge of the opening (21), to a cover material (20) at the flange section (22) using the sealing plate (1).

Description

シール盤、シール方法、および容器SEALING MACHINE, SEALING METHOD, AND CONTAINER
　本発明は、シール盤、シール方法、および容器に関する。 The present invention relates to a sealing board, a sealing method, and a container.
　食品、薬品、化粧品などを収納する容器としては、密封性および開封性の両立が求められている。例えば、使用時の開封を一般に行われているシール面の剥離で行うのではなく、容器として多層容器を用い、多層容器の表面層とそれに接する層との層間を開封剥離面とする容器が知られている。具体的には、多層構造を特定の樹脂を用いた層構成とすることにより、開封の際の剥離強度を安定なものとし、密封性（融着性）および開封性を両立させた各種の容器が提案されている（特許文献１～４）。 As a container for storing food, chemicals, cosmetics, etc., both sealing and unsealing properties are required. For example, a container that uses a multi-layer container as a container and has a surface between the surface layer of the multi-layer container and a layer in contact with the unsealed peel surface is known instead of performing unsealing at the time of use by generally removing the seal surface. It has been. Specifically, by making the multilayer structure into a layer structure using a specific resin, it is possible to stabilize the peeling strength at the time of opening, and various containers that achieve both sealing (fusion) and opening properties. Have been proposed (Patent Documents 1 to 4).
特開平２－２９３２４号公報JP-A-2-29324 特開平３－１４６３４２号明細書JP-A-3-146342 特開平３－２１２３８０号明細書JP-A-3-212380 特開平７－３２５５５号明細書JP-A-7-32555
　しかしながら、容器は、用途により様々な層構成を求められるため、必ずしも、容器の多層構造を特許文献１～４に記載の特定の樹脂を用いた層構成とすることはできず、種々の容器において、容器本体と蓋材との融着性および易剥離性を両立させることは困難であった。 However, since the container is required to have various layer structures depending on the application, the multilayer structure of the container cannot necessarily be a layer structure using the specific resin described in Patent Documents 1 to 4, and various containers are used. In addition, it has been difficult to achieve both fusion and easy peelability between the container body and the lid.
　そこで、本発明は、融着性および易剥離性を両立させてヒートシールできるシール盤、シール方法、および容器を提供することを目的とする。 Therefore, an object of the present invention is to provide a sealing plate, a sealing method, and a container that can be heat-sealed while achieving both fusion and easy peelability.
　本発明において、シール盤とは、被シール面に圧力、温度を掛けて溶接する盤状の器具をいう。被ヒール物は、特に限定されないが、例えば、容器と蓋材との溶接に用いることができる。
　本発明のシール盤は、基盤部とその一方の面に環形状のシール部を設けたシール盤であって、前記シール部は、内周側に被シール面に対し平行な平面を有する平面部と、当該平面部に連続して設けられ、外周側に向かって被シール面から離間する離間部と、を備えることを特徴とする。 In the present invention, the term “sealing board” refers to a board-like instrument that is welded by applying pressure and temperature to the surface to be sealed. Although a to-be-heeled object is not specifically limited, For example, it can use for welding of a container and a cover material.
The seal disc of the present invention is a seal disc provided with a base portion and an annular seal portion on one surface thereof, and the seal portion is a flat portion having a plane parallel to the surface to be sealed on the inner peripheral side. And a separating portion that is provided continuously with the plane portion and is spaced from the surface to be sealed toward the outer peripheral side.
　本発明では、シール部の内周側に平面部が設けられているので、シール部を被シール面に十分に押圧でき、融着性の高いヒートシールが得られる。さらに、離間部が、シール部の外周側に向かって被シール面から離間するよう設けられているので、離間部に対応するヒートシール部分にこの離間部による押圧力に応じて、緩やかに樹脂を移動させることができる。これにより、被シール面に樹脂溜まりが形成されることを抑制できる。また、被シール物が３層以上の積層構造体であった場合には、被シール物のヒートシールにより融着される層より下の層に樹脂溜まりが形成されることを抑制できる。そして、被シール物の一方を他方から剥離する際、樹脂溜まりに引っかかって剥離しにくいという不都合を解消でき、剥離性の高いヒートシールを得られる。
　なお、本発明において、被シール面に対し平行な平面とは、被シール面に対し平行であることに加え、ヒートシール時に融着性を失わない程度に略平行であることを許容する。 In the present invention, since the flat portion is provided on the inner peripheral side of the seal portion, the seal portion can be sufficiently pressed against the surface to be sealed, and a heat seal with high fusion property can be obtained. Further, since the separation portion is provided so as to be separated from the surface to be sealed toward the outer peripheral side of the seal portion, the resin is gently applied to the heat seal portion corresponding to the separation portion according to the pressing force by the separation portion. Can be moved. Thereby, it can suppress that the resin pool is formed in the to-be-sealed surface. Further, when the object to be sealed is a laminated structure of three or more layers, it is possible to suppress the formation of a resin pool in a layer below the layer to be fused by heat sealing of the object to be sealed. When one of the objects to be sealed is peeled off from the other, it is possible to eliminate the inconvenience of being caught by the resin reservoir and difficult to peel off, and a heat peel having high peelability can be obtained.
In the present invention, the plane parallel to the surface to be sealed is not only parallel to the surface to be sealed, but also substantially parallel to the extent that it does not lose its fusing property during heat sealing.
　また、本発明において、前記離間部は、前記シール部の外周側に向かって被シール面から離間する方向に傾斜する斜面であることが好ましい。 In the present invention, it is preferable that the separation portion is a slope inclined in a direction away from the surface to be sealed toward the outer peripheral side of the seal portion.
　この発明によれば、離間部がシール部の外周側に向かって被シール面から離間する方向傾斜しているので、ヒートシール時の押圧力が外周側に向かうほど小さくなる。したがって、樹脂がシール部の外周側に向かって緩やかに移動し、樹脂溜まりが形成されることを抑制できる。これにより、剥離性の高いヒートシールを得られる。 According to the present invention, since the separating portion is inclined in the direction away from the sealed surface toward the outer peripheral side of the seal portion, the pressing force at the time of heat sealing becomes smaller toward the outer peripheral side. Therefore, it can suppress that resin moves gently toward the outer peripheral side of a seal | sticker part, and a resin pool is formed. Thereby, a heat peel with high peelability can be obtained.
　本発明において、前記平面部は、前記シール部の内周側の端縁に前記被シール面に向けて凸形状に形成された凸曲面を有することが好ましい。
　この発明によれば、平面部の内周側の端縁が凸曲面を有するので、平面部を被シール面に押圧してヒートシールする際に、平面部の内周側の端縁に押圧力が集中することがない。したがって、内周縁側の端部に対応する被シール面が過剰にヒートシールされて、シール強度が部分的に大きくなったり、傷つけられたりすることを防ぐことができる。これにより、ヒートシールの融着性や剥離性が均一でなくなるという不都合や、押圧力が集中して、被シール物が切断されてしまうという問題を防止することができる。 In this invention, it is preferable that the said plane part has a convex curved surface formed in the end edge of the inner peripheral side of the said seal part toward the said to-be-sealed surface.
According to the present invention, since the edge on the inner peripheral side of the flat portion has a convex curved surface, when the flat portion is pressed against the surface to be sealed and heat sealed, the pressing force is applied to the inner peripheral side edge of the flat portion. Will not concentrate. Therefore, it can be prevented that the sealed surface corresponding to the end portion on the inner peripheral edge side is excessively heat-sealed and the seal strength is partially increased or damaged. As a result, it is possible to prevent inconvenience that the heat-sealing fusing property and peelability are not uniform and the problem that the pressing force is concentrated and the object to be sealed is cut.
　本発明において、前記シール部の少なくとも一部には、剥離開始端形成部が隣接して設けられ、前記剥離開始端形成部は、前記シール部の外周縁から外周方向に向けて突出した形状に形成されていることが好ましい。
　この発明によれば、シール部に隣接して剥離開始端形成部を設けられているので、ヒートシールの形成時に剥離開始端を一動作で形成できる。さらに、この本発明では、剥離開始端形成部をシール部の外周縁から外周方向に向けて突出した形状に形成することで、被シール面にもこの突出した形状に対応する突出部分が形成され、被シール物の一方が他方から剥離される際には、この突出部分から剥離されることとなるので、ヒートシールの剥離性をより向上できる。
　なお、突出した形状とは、シール部の外周縁から外周方向に向けて突出して設けられた形状であれば、特に限定されるものではなく、円形状、多角形状などが挙げられる。また、当該剥離開始端形成部は、シール部と一体に設けられていてもよく、シール部とは別体として設けられていてもよい。 In the present invention, at least a part of the seal portion is provided with a peeling start end forming portion adjacent thereto, and the peeling start end forming portion has a shape protruding from the outer peripheral edge of the seal portion toward the outer peripheral direction. Preferably it is formed.
According to this invention, since the peeling start end forming portion is provided adjacent to the seal portion, the peeling start end can be formed in one operation when the heat seal is formed. Further, in the present invention, by forming the peeling start end forming portion in a shape protruding from the outer peripheral edge of the seal portion toward the outer peripheral direction, a protruding portion corresponding to the protruding shape is also formed on the sealed surface. When one of the objects to be sealed is peeled from the other, it is peeled off from the protruding portion, so that the peelability of the heat seal can be further improved.
The protruding shape is not particularly limited as long as it is a shape provided to protrude from the outer peripheral edge of the seal portion toward the outer peripheral direction, and examples thereof include a circular shape and a polygonal shape. The peeling start end forming portion may be provided integrally with the seal portion, or may be provided as a separate body from the seal portion.
　本発明において、前記剥離開始端形成部は、被シール面に押圧される面が被シール面に対し平行な平面からなることが好ましい。
　この発明によれば、剥離開始端形成部の被シール面に当接される面が被シール面に対し平行な平面なので、シール時には、ヒートシール部分の樹脂を押し出し、剥離開始端形成部の外縁に対応する被シール面に樹脂溜まりを形成できる。被シール物の一方を他方から剥離する際には、この樹脂溜まりをきっかけとして剥離することができるため、剥離性の高いヒートシールを得られる。 In this invention, it is preferable that the said peeling start end formation part consists of a plane in which the surface pressed by the to-be-sealed surface is parallel with the to-be-sealed surface.
According to this invention, since the surface that contacts the surface to be sealed of the peeling start end forming portion is a plane parallel to the surface to be sealed, the resin of the heat seal portion is extruded during sealing, and the outer edge of the peeling start end forming portion is A resin reservoir can be formed on the surface to be sealed corresponding to. When one of the objects to be sealed is peeled from the other, the resin pool can be used as a trigger, so that a heat seal with high peelability can be obtained.
　一方、本発明のシール方法は、開口部の外周縁に延出して形成されたフランジ部を有する容器本体と、蓋材とを、前記フランジ部でヒートシールするシール方法であって、前記本発明のいずれかに記載のシール盤を、前記蓋材を介して前記フランジ部に押圧してヒートシールすることを特徴とする。
　この発明では、本発明のシール盤を用いてヒートシールするので、容器本体と蓋材とのヒートシールにおいて、シール部の離間部に対応するヒートシール部分にこの離間部による押圧力に応じて、緩やかに樹脂を移動させることができ、樹脂溜まりが形成されることを抑制できる。これにより、樹脂溜まりに引っかかって容器を開封しにくいという不都合を解消でき、開封性が高く開封感の良い容器を得られる。
　また、本発明のシール方法において、さらに、環状の外周シール盤により、前記容器本体と前記蓋材とを、前記フランジ部の前記シール盤でヒートシールされた部分の外周側においてヒートシールすることが好ましい。 On the other hand, the sealing method of the present invention is a sealing method in which a container body having a flange portion formed to extend to the outer peripheral edge of an opening and a lid member are heat-sealed by the flange portion, and the present invention The sealing board according to any one of the above is pressed against the flange portion through the lid member and heat-sealed.
In this invention, since heat sealing is performed using the sealing plate of the present invention, in the heat sealing between the container main body and the lid member, the heat sealing portion corresponding to the separation portion of the sealing portion is subjected to the pressing force by the separation portion, The resin can be moved gently, and the formation of the resin reservoir can be suppressed. As a result, it is possible to eliminate the inconvenience that it is difficult to open the container due to being caught in the resin reservoir, and it is possible to obtain a container having a high openability and a good opening feeling.
In the sealing method of the present invention, the container body and the lid member may be further heat-sealed on the outer peripheral side of the portion heat-sealed by the seal plate of the flange portion by an annular outer seal plate. preferable.
　さらに、本発明のシール方法において、前記容器本体は、前記フランジ部において蓋材とヒートシールされる表面層と当該表面層に隣接する表下層との少なくとも二層を備えた積層構造であり、前記表下層を構成する材料は、１６５℃における損失正接ｔａｎδの値が０．１８未満であることが好ましい。
　この発明によれば、表下層を構成する材料は、１６５℃における損失正接ｔａｎδの値が０．１８未満であるので、表下層の樹脂は、ヒートシール時に緩やかに移動し、樹脂溜まりが形成されにくい。したがって、当該表下層を備えた積層構造の容器本体においては、本発明のシール盤を用いてヒートシールする際、ヒートシール時にシール部の離間部に対応するヒートシール部分に樹脂を移動させることができ、樹脂溜まりが形成されることをさらに抑制できる。したがって、例えば、容器本体において、表面層と表下層とを層間剥離可能に設けた場合、表面層を剥離して容器を開封する際に、樹脂溜まりに引っかかって開封しにくいという不都合を解消でき、開封性が高く開封感の良い容器を得られる。 Furthermore, in the sealing method of the present invention, the container body has a laminated structure including at least two layers of a surface layer to be heat-sealed with a lid member and a surface layer adjacent to the surface layer in the flange portion, The material constituting the surface lower layer preferably has a loss tangent tan δ at 165 ° C. of less than 0.18.
According to the present invention, since the material constituting the upper and lower layers has a loss tangent tan δ value at 165 ° C. of less than 0.18, the resin in the lower and lower layers moves slowly during heat sealing, and a resin pool is formed. Hateful. Therefore, in a container body having a laminated structure including the front and lower layers, when heat sealing is performed using the sealing disk of the present invention, the resin can be moved to a heat sealing portion corresponding to a separation portion of the sealing portion at the time of heat sealing. This can further suppress the formation of a resin reservoir. Therefore, for example, in the container body, when the surface layer and the surface lower layer are provided so as to be capable of delamination, when the container is opened by peeling the surface layer, it is possible to eliminate the inconvenience that it is difficult to open by being trapped in the resin reservoir, A container with high openability and good opening feeling can be obtained.
　一方、本発明の容器は、開口部の外周縁に延出して形成されたフランジ部を有する容器本体と、蓋材とを備え、前記本発明いずれかに記載のシール方法によりヒートシールされたことを特徴とする。
　この発明によれば、本発明のシート方法により、開口部の外周縁に延出して形成されたフランジ部を有する容器本体と蓋材とをヒートシールするので、フランジ部において、シール部の離間部に対応するヒートシール部分に樹脂を移動させることができ、樹脂溜まりが形成されることを抑制できる。これにより、樹脂溜まりに引っかかって開封しにくいという不都合を解消でき、開封性の高い容器が得られる。 On the other hand, the container of the present invention comprises a container main body having a flange portion formed to extend to the outer peripheral edge of the opening, and a lid, and was heat-sealed by the sealing method according to any one of the present invention. It is characterized by.
According to the present invention, the container body having the flange portion formed to extend to the outer peripheral edge of the opening and the lid material are heat sealed by the sheet method of the present invention. The resin can be moved to the heat seal portion corresponding to, and the formation of the resin reservoir can be suppressed. Thereby, the inconvenience that it is difficult to be opened due to being caught in the resin reservoir can be solved, and a container having high openability can be obtained.
　さらに、本発明の容器において、前記フランジ部には、前記蓋材とヒートシールされる層に環状の切込みが設けられていることが好ましい。
　この発明によれば、フランジ部は、前記蓋材とヒートシールされる層に環状の切込みが設けられているので、フランジ部から蓋材を容易に剥離することができ、容器の開封性を向上できる。 Furthermore, in the container of the present invention, it is preferable that the flange portion is provided with an annular cut in a layer heat-sealed with the lid member.
According to this invention, since the flange portion is provided with an annular cut in the layer heat-sealed with the lid material, the lid material can be easily peeled off from the flange portion, and the openability of the container is improved. it can.
本発明の一実施形態におけるシール盤の断面図。Sectional drawing of the seal disc | board in one Embodiment of this invention. 図１のシール盤をシール部が設けられた一方の面側から見た平面図。The top view which looked at the sealing board of FIG. 1 from the one surface side in which the sealing part was provided. 図１のシール盤の部分拡大図。The elements on larger scale of the sealing board of FIG. 図１のシール盤によるヒートシールの状態を示した部分断面図。The fragmentary sectional view which showed the state of the heat seal by the sealing board of FIG. 図１のシール盤によるヒートシールの状態を示した部分断面図。The fragmentary sectional view which showed the state of the heat seal by the sealing board of FIG. 本発明の一実施形態における容器の概略図。The schematic of the container in one embodiment of the present invention. 図６の容器において、蓋材を開封した状態を示す概略図。Schematic which shows the state which opened the cover material in the container of FIG. 図６の容器のヒートシール部の部分断面図。The fragmentary sectional view of the heat seal part of the container of FIG. 従来のヒートシール方法により形成された樹脂溜まりを示した部分断面図。The fragmentary sectional view which showed the resin reservoir formed by the conventional heat sealing method. 図６の容器の開封開始部の部分断面図。The fragmentary sectional view of the opening start part of the container of FIG. 図１のシール盤および外周シール盤によるヒートシールの状態を示した部分断面図。The fragmentary sectional view which showed the state of the heat seal by the sealing disc and outer periphery sealing disc of FIG. 図６の容器の開封方法を示した部分断面図。The fragmentary sectional view which showed the opening method of the container of FIG. 図６の容器が完全に開封された状態を示した部分断面図。The fragmentary sectional view which showed the state by which the container of FIG. 6 was opened completely.
　以下、本発明の実施形態を図面に基づいて説明する。
　本実施形態では、本発明のシール盤として容器の製造時のヒートシールに用いる構成を例示するが、この限りではない。
　本実施形態において、図１に示すように、シール盤１は、容器２のヒートシールに用いられるものであり、容器本体２０の被シール面２３１に蓋材３０をヒートシールするものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, although the structure used for the heat seal at the time of manufacture of a container is illustrated as a sealing board of this invention, it is not this limitation.
In this embodiment, as shown in FIG. 1, the sealing disk 1 is used for heat sealing the container 2, and heat seals the lid member 30 to the sealed surface 231 of the container body 20.
［シール盤の構成］
　図１～５において、シール盤１は、環形状のシール部１Ａと、剥離開始端形成部１Ｂと、基盤部１Ｃとを備えている。シール盤１を構成する材料は特に限定されないが、例えば、アルミ、鉄、銅等の伝熱性を有する金属、またはこれらの合金から適宜選択することができる。基盤部１Ｃの厚みや形状は特に限定されず、シール装置に合わせて、適宜変更したものを好適に用いることができる。 [Structure of seal panel]
1 to 5, the seal disc 1 includes an annular seal portion 1A, a peeling start end forming portion 1B, and a base portion 1C. Although the material which comprises the seal | sticker board | substrate 1 is not specifically limited, For example, it can select from the metal which has heat conductivity, such as aluminum, iron, copper, or these alloys suitably. The thickness and shape of the base portion 1C are not particularly limited, and those appropriately changed according to the sealing device can be suitably used.
　環形状のシール部１Ａは、円型、楕円型、多角型、ひょうたん型、涙型、星形、各種キャラクター形状など、目的とするヒートシールの形状に合わせて、適宜変更することができる。
　シール部１Ａは、容器２の容器本体２０にヒートシールされる蓋材３０に当接するように設けられている。
　シール部１Ａは、環の内周側がヒートシールする部材に平行に形成され、外周側が内周側より遅れてヒートシールする部材に当接するように形成されている。具体的には、シール部１Ａは、環の内周側に、被シール面２３１と平行な平面を有する平面部１１が形成されている。そして、境界Ａを介して、外周側には、平面部１１に連続して、断面がシール部１Ａの環形状の外周側に向かって、被シール面２３１と離間する方向に傾斜する斜面である離間部１２が形成されている。さらに、平面部１１には、シール部１Ａの内周側の端縁がＲ加工されて、被シール面２３１に向けて凸形状となる凸曲面１１１が形成されている。 The ring-shaped seal portion 1A can be appropriately changed according to the target heat seal shape such as a circular shape, an elliptical shape, a polygonal shape, a gourd shape, a tear shape, a star shape, and various character shapes.
The seal portion 1 </ b> A is provided so as to contact the lid member 30 that is heat-sealed to the container body 20 of the container 2.
The seal portion 1A is formed so that the inner peripheral side of the ring is parallel to the member to be heat sealed, and the outer peripheral side is formed in contact with the member to be heat sealed later than the inner peripheral side. Specifically, in the seal portion 1A, a flat portion 11 having a plane parallel to the sealed surface 231 is formed on the inner peripheral side of the ring. Then, on the outer peripheral side through the boundary A, the cross section is an inclined surface that is continuous with the flat surface portion 11 and inclines in a direction away from the sealed surface 231 toward the ring-shaped outer peripheral side of the seal portion 1A. A spacing portion 12 is formed. Further, the planar portion 11 is formed with a convex curved surface 111 having a convex shape toward the sealed surface 231 by rounding the edge on the inner peripheral side of the seal portion 1A.
　ここで、シール盤１において、離間部１２は、シール部１Ａの断面の幅Ｈに対し、０．２Ｈ以上０．８Ｈ以下の幅で形成されることが好ましい。より好ましくは、０．４Ｈ以上０．６Ｈ以下である。離間部１２の幅が０．２Ｈよりも小さくなると、平面部１１によって押圧されて外周側に流動される樹脂が多くなるとともに、平面部１１に遅れて当接する離間部１２の幅が狭すぎて、樹脂を離間部１２に対応するヒートシール部２３に緩やかに移動させることが難しくなる。その結果、ヒートシール部２３の外周縁近傍に樹脂溜まりが形成され易くなり、得られた容器２の開封時にこの樹脂溜まりが引っかかって、ヒートシール部２３の外側で抵抗が大きくなり、容器２の開封を円滑に行うことが困難となる。また、離間部１２の幅が０．８Ｈよりも大きくなると、被シール面２３１と平行な平面部１１の幅が狭くなり、被シール面２３１を十分に押圧できなくなり、容器本体２０と蓋材３０とのヒートシールが十分でなく、容器２の密封性が不十分になるおそれがある。また、離間部１２の外周端と被シール面２３１との離間距離が大きくなるため、外周端に対応する位置までヒートシールしようとすると、平面部１１における押圧力が強くなりすぎ、容器本体２０や蓋材３０を破損してしまう恐れがある。
　なお、幅Ｈは、特に限定されないが、例えば０．８ｍｍ以上３．０ｍｍ以下、さらに好ましくは０．９ｍｍ以上２．５ｍｍ以下、特に好ましくは１ｍｍ以上２ｍｍ以下を好適に用いている。 Here, in the seal disc 1, the separation portion 12 is preferably formed with a width of 0.2H or more and 0.8H or less with respect to the width H of the cross section of the seal portion 1A. More preferably, it is 0.4H or more and 0.6H or less. If the width of the separation portion 12 is smaller than 0.2H, the amount of resin that is pressed by the flat portion 11 and flows to the outer peripheral side increases, and the width of the separation portion 12 that comes into contact with the flat portion 11 with a delay is too small. It becomes difficult to gently move the resin to the heat seal portion 23 corresponding to the separation portion 12. As a result, a resin reservoir is easily formed in the vicinity of the outer peripheral edge of the heat seal portion 23, and this resin reservoir is caught when the obtained container 2 is opened, and the resistance increases outside the heat seal portion 23. It becomes difficult to perform opening smoothly. Further, when the width of the separating portion 12 is larger than 0.8H, the width of the flat portion 11 parallel to the surface to be sealed 231 becomes narrow, and the surface to be sealed 231 cannot be pressed sufficiently, and the container body 20 and the lid member 30. There is a possibility that the heat sealing with the container 2 is not sufficient and the sealing performance of the container 2 is insufficient. In addition, since the separation distance between the outer peripheral end of the separation portion 12 and the surface to be sealed 231 is increased, if the heat seal is attempted to a position corresponding to the outer peripheral end, the pressing force in the flat portion 11 becomes too strong, and the container body 20 or There is a possibility that the lid member 30 may be damaged.
The width H is not particularly limited, and for example, 0.8 mm to 3.0 mm, more preferably 0.9 mm to 2.5 mm, and particularly preferably 1 mm to 2 mm are preferably used.
　また、シール盤１の外周縁側に形成される離間部１２において、内周側から外周側に向かって形成される傾斜角度（θ）は、シール部１Ａの幅である幅Ｈによって異なるが、平面部１１に対して、すなわち、図３に示すように被シール面２３１となる平面Ｙに対して、２°以上２０°以下、好ましくは３°以上１５°以下、より好ましくは６°以上１０°以下に設定されることが好ましい。
　離間部１２の傾斜角度が２°より小さいと、ヒートシール時にシール部１Ａを押圧した場合であっても、被シール面２３１と離間部１２との間隔が十分でなくなり、平面部１１に遅れることなく、ほぼ同時に離間部１２が被シール面２３１を押圧し、離間部１２に対応するヒートシール部２３に樹脂を流動させることができない恐れがある。その結果、樹脂溜まりがヒートシール部２３の外周縁近傍に形成され易くなり、得られた容器２の開封時にこの樹脂溜まりが引っかかって、ヒートシール部２３の外周縁で剥離時の抵抗が大きくなり、容器２の開封を円滑に行うことが困難となる。一方、離間部１２の角度が２０°を超えると、境界Ａの周辺がなだらかでなく尖ってしまい、ヒートシール時に蓋材３０が切断されてしまう場合や、変形して易開封性が損なわれるおそれがある。 In addition, in the separation portion 12 formed on the outer peripheral edge side of the seal disc 1, the inclination angle (θ) formed from the inner peripheral side toward the outer peripheral side varies depending on the width H that is the width of the seal portion 1 </ b> A. With respect to the portion 11, that is, with respect to the plane Y to be the sealed surface 231 as shown in FIG. 3, it is 2 ° to 20 °, preferably 3 ° to 15 °, more preferably 6 ° to 10 °. It is preferable to set as follows.
If the inclination angle of the separation portion 12 is smaller than 2 °, even if the seal portion 1A is pressed during heat sealing, the space between the sealed surface 231 and the separation portion 12 is not sufficient, and the plane portion 11 is delayed. However, there is a possibility that the separation portion 12 presses the sealed surface 231 almost simultaneously and the resin cannot flow to the heat seal portion 23 corresponding to the separation portion 12. As a result, the resin reservoir is easily formed in the vicinity of the outer peripheral edge of the heat seal portion 23, and this resin reservoir is caught when the obtained container 2 is opened, and the resistance at the time of peeling increases at the outer peripheral edge of the heat seal portion 23. It becomes difficult to smoothly open the container 2. On the other hand, when the angle of the spacing portion 12 exceeds 20 °, the periphery of the boundary A is sharply sharpened, and the lid member 30 may be cut during heat sealing or may be deformed to impair easy-openability. There is.
　また、平面部１１に形成された凸曲面１１１は、平面部１１の内周側の端縁が、ヒートシール時の押圧により蓋材３０を破損および切断してしまうことを防ぐことができるものであればよく、凸曲面１１１の曲率半径Ｒは特に限定されない。 Moreover, the convex curved surface 111 formed in the plane part 11 can prevent that the edge of the inner peripheral side of the plane part 11 breaks and cut | disconnects the cover material 30 by the pressure at the time of heat sealing. The curvature radius R of the convex curved surface 111 is not particularly limited.
　剥離開始端形成部１Ｂは、図２に示すように、シール部１Ａの一部に隣接し、シール部１Ａの外周縁から環の外周方向に向けて突出した形状に設けられている。剥離開始端形成部１Ｂの平面形状は、特に限定されないが、外周方向に向けて、徐々に幅の狭くなる形状、開封時に局所的に力がかかる先端状の部分を有する形状であれば特に限定されない。例えば、張り出した先端状の部分を、三角、四角などの多角形状などとすることが好ましい。剥離開始端形成部１Ｂは、図５に示すように、被シール面２３１に対し平行な平面部１３を有し、平面部１３は、シール部１Ａの平面部１１と同一平面上に設けられている。 As shown in FIG. 2, the peeling start end forming portion 1B is adjacent to a part of the seal portion 1A, and is provided in a shape protruding from the outer peripheral edge of the seal portion 1A toward the outer peripheral direction of the ring. The planar shape of the peeling start end forming portion 1B is not particularly limited, but is particularly limited as long as it has a shape that gradually decreases in width toward the outer peripheral direction, or a shape having a tip-like portion that is locally applied when opened. Not. For example, it is preferable that the protruding tip-like portion has a polygonal shape such as a triangle or a square. As shown in FIG. 5, the peeling start end forming portion 1B has a flat surface portion 13 parallel to the surface to be sealed 231. The flat surface portion 13 is provided on the same plane as the flat surface portion 11 of the seal portion 1A. Yes.
　（容器の構成）
　ここで、上記シール盤１によるヒートシールにて製造される容器２の構成について、図面を参照して説明する。
　図６は、本実施形態のシール盤１を用いて製造される容器２の一態様を示した概略図である。 (Container configuration)
Here, the structure of the container 2 manufactured by the heat sealing by the said sealing board 1 is demonstrated with reference to drawings.
FIG. 6 is a schematic view showing an aspect of the container 2 manufactured using the seal board 1 of the present embodiment.
　容器２は、容器本体２０と蓋材３０とを備え、容器本体２０の開口部２１に対して蓋材３０が載置され、容器本体２０の開口部２１の周縁に配設されたフランジ部２２と蓋材３０とがシール盤１によりヒートシールされて、環状のヒートシール部２３および開封開始端としての剥離開始部２５が形成され、図６に示すように、容器２の内部が密封状態とされる。
　一方、密封状態の容器２は、図７に示すように、容器２に設けられた剥離開始部２５から蓋材３０を引き上げるようにして、開封される。 The container 2 includes a container body 20 and a lid member 30, the lid member 30 is placed on the opening 21 of the container body 20, and a flange portion 22 disposed on the periphery of the opening 21 of the container body 20. And the lid member 30 are heat-sealed by the sealing disk 1 to form an annular heat-seal portion 23 and a peeling start portion 25 as an opening start end, and as shown in FIG. Is done.
On the other hand, as shown in FIG. 7, the sealed container 2 is opened by pulling up the lid member 30 from the peeling start portion 25 provided in the container 2.
　容器本体２０は、図６に示すように、上方に開口した円形状の開口部２１と、開口部２１の周縁に形成されたフランジ部２２とを備えている。このような容器本体２０は、図８に示すように、表面層２１１および表下層２１２の少なくとも２層からなる多層シート１０を成形して得られる。 As shown in FIG. 6, the container body 20 includes a circular opening 21 that opens upward, and a flange portion 22 that is formed at the periphery of the opening 21. As shown in FIG. 8, such a container body 20 is obtained by molding a multilayer sheet 10 composed of at least two layers of a surface layer 211 and a surface lower layer 212.
　表面層２１１は、容器本体２０の最内層であり、蓋材３０側の被シール面２３１Ａがフランジ部２２において蓋材３０にシールされて環形状のヒートシール部２３と、ヒートシール部２３の外周縁から環の外周方向に向けて突出して形成された剥離開始部２５と、が形成される。
　本実施形態では、フランジ部２２において、ヒートシール部２３の内周端に沿った切込み２４が形成されている。切込み２４の深さは、特に限定されないが、本実施形態では、後述する表下層２１２に達する深さとしている。 The surface layer 211 is the innermost layer of the container body 20, and the sealed surface 231 </ b> A on the lid member 30 side is sealed by the lid member 30 at the flange portion 22, and the annular heat seal portion 23 and the outside of the heat seal portion 23. A peeling start portion 25 formed so as to protrude from the peripheral edge toward the outer peripheral direction of the ring is formed.
In the present embodiment, in the flange portion 22, a cut 24 is formed along the inner peripheral end of the heat seal portion 23. The depth of the cut 24 is not particularly limited, but in the present embodiment, the depth reaches a surface lower layer 212 described later.
　図８に示すように、ヒートシール後の容器本体２０のヒートシール部２３は、コブ状の樹脂溜まりがなく、ほぼフラットな面を有している。ヒートシール部２３は、シール部１Ａの外周側に向かって傾斜する離間部１２により外周側に向かうほど小さな押圧力でヒートシールされるため、ヒートシール部２３における容器本体２０の表面層２１１、表下層２１２の樹脂は、外周側に向かって緩やかに流動する。そのため、ヒートシール部２３は、ほぼフラットとなり、ヒートシール部２３外周縁にコブ状の樹脂溜まりは形成されにくい。したがって、この容器２を開封する際、樹脂溜まりに引っかかって、開封しにくいといった不都合がない。
　一方、剥離開始部２５は、図９に示すように、容器本体２０のフランジ部２２の外縁に容器本体２０の表面層２１１により形成されたコブ状の樹脂溜まり２５１を有する。 As shown in FIG. 8, the heat seal part 23 of the container main body 20 after heat sealing does not have a bump-shaped resin reservoir and has a substantially flat surface. Since the heat seal part 23 is heat-sealed with a small pressing force toward the outer peripheral side by the separation part 12 inclined toward the outer peripheral side of the seal part 1A, the surface layer 211 of the container body 20 in the heat seal part 23, the surface The resin of the lower layer 212 gently flows toward the outer peripheral side. Therefore, the heat seal portion 23 is substantially flat, and a bump-shaped resin reservoir is hardly formed on the outer peripheral edge of the heat seal portion 23. Therefore, when opening the container 2, there is no inconvenience that the container 2 is caught by the resin reservoir and is difficult to open.
On the other hand, as shown in FIG. 9, the peeling start portion 25 has a bump-shaped resin reservoir 251 formed by the surface layer 211 of the container body 20 on the outer edge of the flange portion 22 of the container body 20.
　次に、容器本体２０を構成する多層シート１０について説明する。
　表面層２１１は、多層シート１０を容器本体２０の形状に成形したときに、内容物と接しかつ蓋材３０とヒートシールされる層となる。そして、詳細は後述するが、蓋材３０とヒートシールされた部分は、蓋材３０と共に容器本体２０から剥離される。
　表面層２１１としては、例えば蓋材３０とヒートシールされる材料、好ましくはポリオレフィン系樹脂が好適に用いられる。具体的には、ホモポリプロピレン（ＨＰＰ）、ランダムポリプロピレン（ＲＰＰ）、ブロックポリプロピレンなどのポリプロピレン系樹脂や、高密度ポリエチレン（ＨＤＰＥ）、低密度ポリエチレン（ＬＤＰＥ）などのポリエチレン系樹脂、直鎖状エチレン－α－オレフィン共重合体などが用いられる。 Next, the multilayer sheet 10 constituting the container body 20 will be described.
The surface layer 211 is a layer that comes into contact with the contents and is heat-sealed with the lid 30 when the multilayer sheet 10 is molded into the shape of the container body 20. Although details will be described later, the portion heat-sealed with the lid member 30 is peeled from the container body 20 together with the lid member 30.
As the surface layer 211, for example, a material to be heat-sealed with the lid member 30, preferably a polyolefin resin is suitably used. Specifically, polypropylene resins such as homopolypropylene (HPP), random polypropylene (RPP) and block polypropylene, polyethylene resins such as high density polyethylene (HDPE) and low density polyethylene (LDPE), linear ethylene- An α-olefin copolymer or the like is used.
　表下層２１２は、表面層２１１に隣接して表面層２１１の下層を構成し、多層シート１０の主要となる層であり、容器本体２０の外表面に現れる層である。表下層２１２は、上述した容器２の開封に際して表面層２１１との間で層間剥離される。 The lower surface layer 212 is adjacent to the surface layer 211 and constitutes the lower layer of the surface layer 211, is a main layer of the multilayer sheet 10, and is a layer that appears on the outer surface of the container body 20. The surface lower layer 212 is delaminated with the surface layer 211 when the container 2 is opened.
　表下層２１２を構成する材料は、１６５℃における損失正接tanδの値が０．１８未満であることが好ましい。より好ましくは１６５℃における損失正接tanδの値が０．１０以下、特に好ましくは０．０７以下である。
　表下層２１２の１６５℃における損失正接tanδの値が０．１８未満であると、この多層シート１０をヒートシールする際に、表下層２１２の樹脂は緩やかに移動し、樹脂溜まりが形成されにくい。
　前述したように本実施形態においては、この表下層２１２を有する多層シート１０により容器本体２０を成形する。前述した本実施形態のシール盤１を用いることに併せて、容器本体２０をこの多層シート１０により成形すれば、ヒートシール時にシール部１Ａの離間部１２に対応するヒートシール部２３に樹脂を緩やかに移動させることができ、樹脂溜まりが形成されることをさらに抑制できる。
　なお、表下層２１２の１６５℃における損失正接tanδの値は０．１８未満であれば特に問題はないが、０．０１以上であれば、より好適に用いることができる。１６５℃における損失正接tanδの値を０．０１以上０．１８未満とすることで、樹脂溜まりが形成されることを抑制でき、適切に層間剥離できるとともに高い密封性が得られるヒートシールの接着強度とすることができる。 The material constituting the lower layer 212 preferably has a loss tangent tan δ value at 165 ° C. of less than 0.18. More preferably, the value of the loss tangent tan δ at 165 ° C. is 0.10 or less, particularly preferably 0.07 or less.
When the value of the loss tangent tan δ at 165 ° C. of the upper and lower layers 212 is less than 0.18, when the multilayer sheet 10 is heat-sealed, the resin of the lower and lower layers 212 moves slowly and it is difficult to form a resin pool.
As described above, in the present embodiment, the container body 20 is formed from the multilayer sheet 10 having the upper and lower layers 212. If the container body 20 is formed with the multilayer sheet 10 in addition to the use of the sealing plate 1 of the present embodiment described above, the resin is loosened to the heat seal portion 23 corresponding to the separating portion 12 of the seal portion 1A during heat sealing. It can be made to move to, and it can further suppress that a resin pool is formed.
The value of the loss tangent tan δ at 165 ° C. of the lower surface layer 212 is not particularly problematic as long as it is less than 0.18, but can be more suitably used if it is 0.01 or more. By setting the value of the loss tangent tan δ at 165 ° C. to be not less than 0.01 and less than 0.18, it is possible to suppress the formation of a resin reservoir, and it is possible to appropriately delamination and to obtain high sealing performance, the heat seal adhesive strength It can be.
　なお、損失正接tanδの測定方法および測定装置は、動的粘弾性測定装置（ＤＭＳ）である。
　そして、構成材料である樹脂の損失正接tanδは、使用する原料の配合によって制御することができる。 The measuring method and measuring device for loss tangent tan δ is a dynamic viscoelasticity measuring device (DMS).
The loss tangent tan δ of the resin as the constituent material can be controlled by blending the raw materials used.
　表下層２１２を構成する具体的な材料としては、例えばオレフィン系樹脂、ポリスチレン系樹脂、および、ポリエステル系樹脂の群から選ばれる少なくともいずれか１種からなる構成とすることが好ましい。
　そして、オレフィン系樹脂としては、具体的にはポリプロピレン、ポリエチレンなどが用いられ、特にポリプロピレンが広く流通されて容易に入手でき安価であるとともに高強度である点から好適に用いられる。
　ポリスチレン系樹脂としては、具体的には汎用の透明で剛性のあるＧＰグレードのポリスチレンや、耐衝撃性のＨＩグレードのポリスチレンなどが用いられ、特にＨＩグレードのポリスチレンが容器などとして利用する際に要求される耐衝撃性の点から好適に用いられる。
　ポリエステル系樹脂としては、具体的には非晶性ポリエステル、結晶性ポリエステルなどが用いられ、特に非晶性ポリエステルが加工性の理由から好適に用いられる。 As a specific material constituting the surface lower layer 212, for example, it is preferable that the material is composed of at least one selected from the group of olefin resin, polystyrene resin, and polyester resin.
As the olefin resin, specifically, polypropylene, polyethylene, and the like are used. In particular, polypropylene is preferably used because it is widely distributed and easily available, is inexpensive, and has high strength.
Specific examples of the polystyrene-based resin include general-purpose transparent and rigid GP grade polystyrene and impact-resistant HI grade polystyrene, and particularly required when HI grade polystyrene is used as a container. It is preferably used from the viewpoint of impact resistance.
As the polyester resin, specifically, amorphous polyester, crystalline polyester, or the like is used, and amorphous polyester is particularly preferably used for reasons of processability.
　特に、表下層２１２として、プロピレン単位を少なくとも一部に含む重合体（以下ポリプロピレン系樹脂といい、適宜ＰＰと表す）と、エチレン単位を少なくとも一部に含む重合体（以下ポリエチレン系樹脂といい、適宜ＰＥと表す）とを、ＰＰ：ＰＥ＝３０質量％以上９９質量％以下：１質量％以上７０質量％以下で配合された樹脂組成物を用いることが好ましい。
　ここで、質量比ＰＰ／ＰＥが０．６７より小さくなるとヒートシール時に樹脂溜まりが発生して開封不良を発生するという不都合を生じるおそれがある。特に、質量比ＰＰ／ＰＥが０．４２９より少なくなると剛性不足を生じるおそれがあり、質量比ＰＰ／ＰＥが９９より多くなると柔軟性不足を生じるおそれがある。
　そして、ポリプロピレン系樹脂とは、具体的には、ホモポリプロピレン、ランダムポリプロピレン、ブロックポリプロピレン、およびこれらの混合物の４種類のうちのいずれかから選択されたものである。そして、耐熱性を考慮する場合には、ホモポリプロピレン、ブロックポリプロピレン、ランダムポリプロピレンの順で好ましい。また、他の層とのシール性を考慮する場合には、ランダムポリプロピレン、ブロックポリプロピレン、ホモポリプロピレンの順で好ましい。
　また、ポリエチレン系樹脂とは、具体的には、高密度ポリエチレン、低密度ポリエチレンなどが用いられ、特に低密度ポリエチレンが成形加工安定性の理由から好適に用いられる。 In particular, as the lower layer 212, a polymer containing at least part of a propylene unit (hereinafter referred to as a polypropylene resin, and appropriately referred to as PP), and a polymer containing at least part of an ethylene unit (hereinafter referred to as polyethylene resin) It is preferable to use a resin composition in which PP: PE = 30% by mass or more and 99% by mass or less: 1% by mass or more and 70% by mass or less.
Here, when the mass ratio PP / PE is smaller than 0.67, there is a possibility that a resin pool is generated at the time of heat-sealing to cause a problem of unsuccessful opening. In particular, when the mass ratio PP / PE is less than 0.429, rigidity may be insufficient, and when the mass ratio PP / PE is more than 99, flexibility may be insufficient.
The polypropylene resin is specifically selected from any of four types of homopolypropylene, random polypropylene, block polypropylene, and mixtures thereof. And when heat resistance is considered, it is preferable in order of a homo polypropylene, a block polypropylene, and a random polypropylene. Moreover, when considering the sealing properties with other layers, random polypropylene, block polypropylene, and homopolypropylene are preferable in this order.
Specific examples of the polyethylene-based resin include high-density polyethylene and low-density polyethylene. Particularly, low-density polyethylene is preferably used for reasons of molding process stability.
　なお、表下層２１２には、タルクなどの無機フィラーが添加されてもよい。
　また、表下層２１２は、表面層２１１に直接隣接して積層形成されているが、表面層２１１と表下層２１２との間に、接着層などのヒートシールにより流動しない、もしくは流動しにくい比較的に薄膜な層が設けられていてもよい。 Note that an inorganic filler such as talc may be added to the front and lower layers 212.
In addition, the upper and lower layers 212 are formed so as to be directly adjacent to the surface layer 211, but the surface layer 211 does not flow due to heat sealing such as an adhesive layer between the surface layer 211 and the surface layer 212. A thin layer may be provided.
　容器となる成形前の多層シート１０を製造する方法としては、共押出し、ドライラミネーション、押出ラミネーション、押出コーティングなどの方法やこれらの方法を組み合わせた方法を採用することができる。なお、各層の厚み、樹脂選定や配合比率などにより、各層の接着強度を調節することができる。 As a method for producing the multilayer sheet 10 before forming as a container, a method such as co-extrusion, dry lamination, extrusion lamination, extrusion coating, or a combination of these methods can be employed. In addition, the adhesive strength of each layer can be adjusted with the thickness of each layer, resin selection, a mixture ratio, etc.
　なお、容器本体２０のフランジ部２２の厚さ寸法は、好ましくは２００μｍ以上２０００μｍ以下、より好ましくは２５０μｍ以上１５００μｍ以下、特に好ましくは３００μｍ以上１２００μｍ以下とする。
　ここで、フランジ部２２の厚さ寸法が２００μｍより薄くなると容器としての剛性が下がるという不都合を生じるおそれがあり、２０００μｍより厚くなると薄肉容器とは言い難く、多くの材料が必要となって製造コスト（原料費）が上がるという不都合を生じるおそれがあることから、上記範囲に設定されることが好ましい。 The thickness dimension of the flange portion 22 of the container body 20 is preferably 200 μm or more and 2000 μm or less, more preferably 250 μm or more and 1500 μm or less, and particularly preferably 300 μm or more and 1200 μm or less.
Here, if the thickness of the flange portion 22 is less than 200 μm, there is a risk that the rigidity of the container is lowered. If the thickness is greater than 2000 μm, it is difficult to say that the container is a thin container, and a lot of materials are required and the manufacturing cost is increased. Since there is a possibility of causing a disadvantage that (raw material cost) increases, it is preferably set in the above range.
　蓋材３０は、容器２の外部に現れる外層３１１と、容器本体２０の表面層２１１とヒートシールされるシール層３１２の少なくとも２層からなる多層フィルムからなるものである。
　容器本体２０の表面層２１１とヒートシールされる蓋材３０のシール層３１２は、表面層２１１と表下層２１２との間の層間剥離強度よりも、表面層２１１とシール層３１２との層間剥離強度の方が強くなるよう設けられる。
　このようなシール層３１２の構成材料としては、表面層２１１および表下層２１２の材料にもよるが、ランダムポリプロピレン（ＲＰＰ）やブロックポリプロピレン（ＢＰＰ）、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、ポリエチレン等を使用することができる。 The lid member 30 is made of a multilayer film composed of at least two layers: an outer layer 311 that appears outside the container 2, a surface layer 211 of the container body 20, and a seal layer 312 that is heat-sealed.
The surface layer 211 of the container body 20 and the seal layer 312 of the lid member 30 to be heat-sealed have a delamination strength between the surface layer 211 and the sealing layer 312 rather than a delamination strength between the surface layer 211 and the surface lower layer 212. Is provided to be stronger.
The constituent material of such a sealing layer 312 depends on the material of the surface layer 211 and the upper and lower layers 212, but is random polypropylene (RPP), block polypropylene (BPP), linear low density polyethylene (LLDPE), polyethylene, etc. Can be used.
　外層３１１の構成材料としては、特に制限はないが、二軸延伸ポリプロピレンフィルム（ＯＰＰ）、二軸延伸ポリエチレンテレフタレートフィルム（ＯＰＥＴ）、二軸延伸ナイロンフィルム（ＯＮｙ）などを使用することができる。
　蓋材３０となる多層フィルムを製造する方法としては、熱ラミネーションやドライラミネーションなどを採用することができる。 Although there is no restriction | limiting in particular as a constituent material of the outer layer 311, A biaxially stretched polypropylene film (OPP), a biaxially stretched polyethylene terephthalate film (OPET), a biaxially stretched nylon film (ONy), etc. can be used.
As a method for producing a multilayer film that becomes the lid member 30, thermal lamination, dry lamination, or the like can be employed.
　なお、このような表面層２１１および表下層２１２を容器本体２０に、またシール層３１２を蓋材３０に採用して両者をヒートシールした場合にあっては、表面層２１１およびシール層３１２が融着する一方、開封の際には、応力に対して弱い容器本体２０の表面層２１１と表下層２１２との間で、層間剥離して、開封が良好に行われることになる。 When the surface layer 211 and the surface lower layer 212 are used for the container body 20 and the sealing layer 312 is used for the lid member 30 and both are heat sealed, the surface layer 211 and the sealing layer 312 are melted. On the other hand, at the time of opening, delamination occurs between the surface layer 211 and the surface lower layer 212 of the container body 20 which is weak against stress, and the opening is performed well.
　（シール方法）
　次に、上記シール盤１を用いて、上記容器本体２０と蓋材３０とをヒートシールする方法について図面を参照して説明する。 (Sealing method)
Next, a method for heat-sealing the container body 20 and the lid member 30 using the seal board 1 will be described with reference to the drawings.
　容器本体２０のフランジ部２２と蓋材３０とのヒートシールは、図８に示すように、容器本体２０のフランジ部２２に蓋材３０を重ね合わせ、当該蓋材３０の上部から、加熱状態のシール盤１を図８中の矢印方向に押圧することにより実施される。
　より詳細には、図５に示すように、まず、シール盤１における平面部１１を蓋材３０に当接させる。このとき、平面部１１の内周縁は、容器本体２０に設けられた切込み２４よりも外周側に接するようにする。続いて、当該境界Ａの外周縁側に形成された離間部１２が、内周側から徐々に蓋材３０に当接し、蓋材３０および容器本体２０を押圧する。これにより、容器本体２０および蓋材３０は、容器本体２０の内周側から徐々に押圧されるとともに、外周側ほど小さな力で押圧されることとなる。すなわち、ヒートシール部２３は、ヒートシール部２３の外周側ほど小さな力で押圧されて形成される。したがって、容器本体２０の表面層２１１および蓋材３０のシール層３１２の樹脂は、シール部１Ａの押圧力に応じて、前記の境界Ａの下部からシール部１Ａの外周側に緩やかに流動し、樹脂が流動した状態で、表面層２１１とシール層３１２とがヒートシールされ、図８に示すように両者が融着されることになる。 As shown in FIG. 8, the heat seal between the flange portion 22 of the container main body 20 and the lid member 30 is performed by superimposing the lid member 30 on the flange portion 22 of the container main body 20. This is implemented by pressing the sealing board 1 in the direction of the arrow in FIG.
More specifically, as shown in FIG. 5, first, the flat surface portion 11 of the seal board 1 is brought into contact with the lid member 30. At this time, the inner peripheral edge of the flat surface portion 11 is in contact with the outer peripheral side of the notch 24 provided in the container main body 20. Subsequently, the separation portion 12 formed on the outer peripheral edge side of the boundary A gradually contacts the lid member 30 from the inner circumference side and presses the lid member 30 and the container body 20. Thereby, while the container main body 20 and the lid | cover material 30 are pressed gradually from the inner peripheral side of the container main body 20, it will be pressed by small force toward the outer peripheral side. That is, the heat seal portion 23 is formed by being pressed with a smaller force toward the outer peripheral side of the heat seal portion 23. Therefore, the resin of the surface layer 211 of the container body 20 and the sealing layer 312 of the lid member 30 gently flows from the lower part of the boundary A to the outer peripheral side of the sealing part 1A according to the pressing force of the sealing part 1A. With the resin flowing, the surface layer 211 and the sealing layer 312 are heat sealed, and both are fused as shown in FIG.
　図９に示すように、ヒートシール部２３が幅広く急激に押圧されると、多量の樹脂がヒートシール部２３の外縁に一度に押し出され、コブ状の樹脂溜まりＸが形成されるおそれがある。樹脂溜まりＸは、例えば、押圧面がすべてフランジ部に対し平行な平面で構成される従来のシール盤に急激に押圧されることにより、まず、表下層２１２の樹脂がヒートシール部２３の外縁からフランジ部の外周方向に向かって押し出され、表面層２１１および蓋材３０のシール層３１２を巻き込むようにして、コブ状に形成される。容器を開封する際には、蓋材をフランジ部の内周方向に向けてめくることにより開封するが、コブ状の樹脂溜まりＸは、上述の通り、開封方向とは逆のフランジ部の外周方向に向かって形成される上、剥離される表面層２１１およびシール層３１２を巻き込むように形成されているので、樹脂溜まりに引っかかって開封しにくいという不都合が生じる。また、コブ状の樹脂溜まりＸは、フランジ部２２において均一に形成されるわけではなく、有無や大きさにばらつきが生じる。したがって、樹脂溜まりＸが形成された容器２では、安定した開封性が得られないという不都合を生じる。 As shown in FIG. 9, when the heat seal portion 23 is pressed widely and suddenly, a large amount of resin may be pushed out to the outer edge of the heat seal portion 23 at a time, and a bump-shaped resin pool X may be formed. The resin reservoir X is, for example, abruptly pressed by a conventional sealing disk whose pressing surface is a plane parallel to the flange portion, so that the resin of the lower and lower layers 212 is first removed from the outer edge of the heat seal portion 23. It is extruded toward the outer peripheral direction of the flange portion, and is formed into a bump shape so as to involve the surface layer 211 and the sealing layer 312 of the lid member 30. When opening the container, the lid material is opened by turning it toward the inner peripheral direction of the flange portion. As described above, the bump-shaped resin reservoir X is the outer peripheral direction of the flange portion opposite to the opening direction. In addition, since the surface layer 211 and the seal layer 312 to be peeled are formed, the inconvenience of being caught by the resin reservoir and difficult to open arises. In addition, the bump-shaped resin reservoir X is not uniformly formed in the flange portion 22, and varies in presence or absence and size. Therefore, in the container 2 in which the resin reservoir X is formed, there arises a disadvantage that a stable opening property cannot be obtained.
　しかしながら、本実施形態のシール方法では、シール盤１を用いてヒートシールすることにより、容器本体２０の表下層２１２の樹脂が、ヒートシール部２３の外周側に向かって緩やかに流動するため、ヒートシール部２３の外周縁に樹脂溜まりが形成されにくい。したがって、容器２の開封時に樹脂溜まりに引っかかって開封しにくいという不都合が生じにくく、開封性を向上することができる。また、本実施形態におけるシール方法によれば、樹脂溜まりが形成されにくいため、容器２における樹脂溜まりの有無や大きさのばらつきにより、安定した開封性が得られないという不都合も解消することができる。 However, in the sealing method according to the present embodiment, heat sealing is performed using the sealing disk 1, so that the resin of the upper and lower layers 212 of the container body 20 flows gently toward the outer peripheral side of the heat sealing portion 23. A resin reservoir is hardly formed on the outer peripheral edge of the seal portion 23. Therefore, it is difficult to cause the inconvenience that it is difficult to open the container 2 by being caught in the resin reservoir, and the opening property can be improved. In addition, according to the sealing method in the present embodiment, since the resin reservoir is not easily formed, the disadvantage that stable opening performance cannot be obtained due to the presence or absence of the resin reservoir in the container 2 and the size variation can be solved. .
　また、本実施形態のシール方法では、容器本体２０を多層シート１０で成形する。この多層シート１０は、上述したように表下層２１２を構成する樹脂が、１６５℃における損失正接ｔａｎδの値が０．１８未満であり、ヒートシール時には、表下層２１２を構成する樹脂が緩やかに移動するので、樹脂溜まりが形成されにくいものである。本実施形態のシール方法では、上記シール盤１を用いることに加え、表下層２１２を有する容器本体２０をヒートシールするので、より一層樹脂溜まりが形成されにくい。 Further, in the sealing method of the present embodiment, the container body 20 is formed from the multilayer sheet 10. In the multilayer sheet 10, as described above, the resin constituting the upper and lower layer 212 has a loss tangent tan δ value of less than 0.18 at 165 ° C., and the resin constituting the lower and lower layer 212 moves slowly during heat sealing. Therefore, the resin reservoir is difficult to be formed. In the sealing method of the present embodiment, the container body 20 having the upper and lower layers 212 is heat-sealed in addition to the use of the sealing plate 1, so that a resin reservoir is more difficult to be formed.
　また、図１０に示すように、シール部１Ａと同時に剥離開始端形成部１Ｂが容器本体２０および蓋材３０に押圧されることにより、剥離開始部２５が形成される。容器本体２０の表面層２１１の樹脂は、剥離開始端形成部１Ｂの平面部１３により押圧されることにより、容器２の外周側に押し出され、剥離開始端形成部１Ｂの外縁が接する位置、すなわち剥離開始部２５の外縁近傍に樹脂溜まり２５１を形成する。そして、剥離開始部２５は、樹脂溜まり２５１が形成された状態で、容器本体２０の表面層２１１と蓋材３０のシール層３１２とがヒートシールされ、両者が融着される。このとき、平面部１３の先端がフランジ部２２の外縁に十分近ければ、樹脂溜まり２５１がフランジ部２２の外縁に形成され、開封時には、蓋材３０と共にこの樹脂溜まり２５１を上方（図１２中矢印の方向）に引き上げることにより、樹脂溜まり２５１と表下層２１２との間に応力を集中させることができるので、剥離開始部２５における開封性が向上する。 Further, as shown in FIG. 10, the peeling start portion 25 is formed by pressing the peeling start end forming portion 1B against the container body 20 and the lid member 30 simultaneously with the seal portion 1A. The resin of the surface layer 211 of the container body 20 is pushed to the outer peripheral side of the container 2 by being pressed by the flat surface portion 13 of the peeling start end forming portion 1B, that is, the position where the outer edge of the peeling start end forming portion 1B is in contact. A resin reservoir 251 is formed near the outer edge of the peeling start portion 25. In the peeling start portion 25, the surface layer 211 of the container body 20 and the seal layer 312 of the lid member 30 are heat-sealed with the resin reservoir 251 formed, and both are fused. At this time, if the tip of the flat surface portion 13 is sufficiently close to the outer edge of the flange portion 22, a resin reservoir 251 is formed on the outer edge of the flange portion 22, and when opened, the resin reservoir 251 together with the lid member 30 is moved upward (arrow in FIG. 12). Since the stress can be concentrated between the resin reservoir 251 and the surface lower layer 212, the unsealing property at the peeling start portion 25 is improved.
　ここで、シール条件として、シール温度としては、ヒートシールされる材料の種類などにより適宜決定すればよいが、表面層２１１の溶融温度よりも高い温度、一般に、１６０℃以上２４０℃以下程度、より好ましくは１８０℃以上２２０℃以下とすればよい。
　同様に、シール圧力は、好ましくは０．９８Ｐａ以上７．８４５Ｐａ以下（１０ｋｇ／ｃｍ２以上８０ｋｇ／ｃｍ２以下）程度、より好ましくは１．９６Ｐａ以上６．８６Ｐａ以下（２０ｋｇ／ｃｍ２以上７０ｋｇ／ｃｍ２以下）、さらに好ましくは２５Ｐａ以上６０Ｐａ以下とすればよい。ここで、押圧力が０．９８Ｐａより弱いと十分にヒートシールできないおそれがあり、押圧力が７．８４５Ｐａより大きくなってもシール層３１２と表面層２１１とのヒートシールに大差はなく、押圧エネルギーが増大してしまう不都合があるため、上記範囲に設定される。 Here, as a sealing condition, the sealing temperature may be appropriately determined depending on the type of material to be heat sealed, but is higher than the melting temperature of the surface layer 211, generally about 160 ° C. or higher and 240 ° C. or lower. Preferably, the temperature may be 180 ° C. or higher and 220 ° C. or lower.
Similarly, the sealing pressure is preferably about 0.98 Pa to 7.845 Pa (10 kg / cm 2 to 80 kg / cm 2 ), more preferably 1.96 Pa to 6.86 Pa (20 kg / cm 2 to 70 kg / cm 2). cm 2 or less), more preferably 25 Pa or more and 60 Pa or less. Here, if the pressing force is weaker than 0.98 Pa, there is a possibility that heat sealing cannot be performed sufficiently. Even if the pressing force is higher than 7.845 Pa, there is no great difference in the heat sealing between the sealing layer 312 and the surface layer 211, and the pressing energy Therefore, the above range is set.
　なお、シール盤１によるヒートシールのみでは、フランジ部の外周縁側から夾雑物が入りやすくなるおそれがある。そのようなことを防止するために、シール盤１により、蓋材３０のシール層３１２をフランジ部２２の表面層２１１にヒートシールした後に、環状の外周シール盤１００（図１１）を用いて、容器本体２０の表面層２１１と蓋材３０のシール層３１２を押圧し、ヒートシール部２３の外周をヒートシールするようにすればよい。外周シール盤のシール面は平滑でも良いが、易開封性を損なわないために、ローレット等の部分接着が可能な面にしても構わない。 In addition, there exists a possibility that a foreign substance may enter easily from the outer periphery side of a flange part only by the heat seal by the sealing board 1. FIG. In order to prevent such a situation, after the seal layer 312 of the lid member 30 is heat-sealed to the surface layer 211 of the flange portion 22 by the seal disc 1, using the annular outer peripheral seal disc 100 (FIG. 11), What is necessary is just to press the surface layer 211 of the container main body 20 and the sealing layer 312 of the lid | cover material 30, and to heat-seal the outer periphery of the heat seal part 23. FIG. The sealing surface of the outer peripheral sealing board may be smooth, but may be a surface capable of partial adhesion such as knurling so as not to impair easy-openability.
　（易開封性容器の開封動作）
　以上説明した容器２を開封する方法を説明する。
　まず、密閉された容器２の剥離開始部２５において、図１２に示す蓋材３０の外縁を樹脂溜まり２５１と共に蓋材３０を開封する方向へ引っ張ると、樹脂溜まり２５１がノッチとして作用し、容器本体２０の表面層２１１と表下層２１２との間で層間剥離する。
　そして、表面層２１１と表下層２１２との間の層間剥離が、切込み２４に達すると、シール層３１２が分離される。そして、この分離位置から順に環状の切込み２４に沿ってシール層３１２が分離され、図１３に示すように容器２は開封される。 (Opening operation of easily openable containers)
A method for opening the container 2 described above will be described.
First, when the outer edge of the lid member 30 shown in FIG. 12 is pulled in the direction of opening the lid member 30 together with the resin reservoir 251 in the peeling start portion 25 of the sealed container 2, the resin reservoir 251 acts as a notch, and the container body The delamination occurs between the 20 surface layers 211 and the lower layer 212.
When the delamination between the surface layer 211 and the upper and lower layers 212 reaches the cut 24, the seal layer 312 is separated. Then, the sealing layer 312 is separated along the annular cut 24 in this order from the separation position, and the container 2 is opened as shown in FIG.
［本実施形態の効果］
　前記したような実施形態によれば、次のような効果を奏することができる。 [Effect of this embodiment]
According to the embodiment as described above, the following effects can be obtained.
（１）シール盤１において、環状のシール部１Ａに内周側に被シール面２３１に対し平行な平面部１１と、平面部１１に連続して、外周側に向かって被シール面２３１から離間する方向に傾斜した離間部１２とを設けた。これにより、平面部１１では融着性の高いヒートシールが得られる。一方、離間部１２においては、外周側に向かうほど押圧力が小さくなるので、離間部１２に対応するヒートシール部２３に樹脂が緩やかに移動し、樹脂溜まりが形成されることを防ぐことができる。 (1) In the seal disc 1, the planar portion 11 parallel to the sealed surface 231 on the inner circumferential side of the annular sealing portion 1A and the planar portion 11 are continuous from the sealed surface 231 toward the outer circumferential side. And a spacing portion 12 that is inclined in the direction to be moved. Thereby, in the plane part 11, a heat seal with high fusion property is obtained. On the other hand, since the pressing force decreases toward the outer peripheral side in the separation portion 12, it is possible to prevent the resin from slowly moving to the heat seal portion 23 corresponding to the separation portion 12 and forming a resin pool. .
（２）シール部１Ａの内周側の端縁に凸曲面１１１を設けたので、シール部１Ａを被シール物に押圧した場合であっても、内周側の端縁に押圧力が集中することがなく、蓋材３０が切断されてしまうことを防止することができる。
（３）シール盤１に、剥離開始端形成部１Ｂを設け、シール部１Ａの外周縁から外周方向に向けて突出した形状としたので、これにより形成される剥離開始部２５も突出した形状に形成される。この突出した形状の剥離開始部２５には、開封の際、応力が集中するので、小さな力で開封することができ、容器２の開封性を向上することができる。
（４）また、この剥離開始端形成部１Ｂの蓋材３０に当接される面をシール部１Ａの平面部１１と同一平面にある平面部１３で構成したので、シール盤１を押圧すれば、剥離開始部２５の外縁であるフランジ部２２の外縁に樹脂溜まり２５１を形成できる。この樹脂溜まりは、容器２の開封時にノッチとして作用するため、容器２の開封性を向上することができる。
（５）容器本体２０を、多層シート１０を用いて成形した。多層シート１０において、表下層２１２は、１６５℃における損失正接tanδの値が０．１８未満であるので、容器本体２０をヒートシールする際、表下層２１２の樹脂が緩やかに移動し、樹脂溜まりが形成されるにくい。したがって、上記シール盤１によるヒートシールと併せて、容器本体２０に樹脂溜まりが形成されることをより一層抑制することができる。 (2) Since the convex curved surface 111 is provided on the inner peripheral edge of the seal portion 1A, the pressing force concentrates on the inner peripheral edge even when the seal portion 1A is pressed against the object to be sealed. It is possible to prevent the lid member 30 from being cut.
(3) Since the peeling start end forming portion 1B is provided on the seal board 1 and protruded from the outer peripheral edge of the seal portion 1A toward the outer peripheral direction, the peeling start portion 25 formed thereby also has a protruding shape. It is formed. Since stress concentrates on the projecting start portion 25 of the protruding shape when opening, it can be opened with a small force, and the opening property of the container 2 can be improved.
(4) Since the surface of the peeling start end forming portion 1B that is in contact with the lid member 30 is constituted by the flat portion 13 that is in the same plane as the flat portion 11 of the seal portion 1A, if the seal disc 1 is pressed, The resin reservoir 251 can be formed on the outer edge of the flange portion 22 that is the outer edge of the peeling start portion 25. Since this resin reservoir acts as a notch when the container 2 is opened, the opening property of the container 2 can be improved.
(5) The container body 20 was molded using the multilayer sheet 10. In the multilayer sheet 10, since the value of the loss tangent tan δ at 165 ° C. is less than 0.18, the resin of the front and lower layers 212 moves slowly and the resin pool is moved when the container body 20 is heat sealed. Hard to be formed. Therefore, it is possible to further suppress the formation of a resin reservoir in the container body 20 in combination with the heat sealing by the sealing board 1.
［実施形態の変形］
　なお、以上説明した態様は、本発明の一態様を示したものであって、本発明は、前記した実施形態に限定されるものではなく、本発明の構成を備え、目的および効果を達成できる範囲内での変形や改良が、本発明の内容に含まれるものであることはいうまでもない。また、本発明を実施する際における具体的な構造および形状等は、本発明の目的および効果を達成できる範囲内において、他の構造や形状等としても問題はない。本発明は前記した各実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形や改良は、本発明に含まれるものである。 [Modification of Embodiment]
The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and has the configuration of the present invention and can achieve the object and effect. It goes without saying that modifications and improvements within the scope are included in the content of the present invention. Further, the specific structure, shape, etc. in carrying out the present invention are not problematic as other structures, shapes, etc., within the scope of achieving the objects and effects of the present invention. The present invention is not limited to the above-described embodiments, and modifications and improvements within the scope that can achieve the object of the present invention are included in the present invention.
　本実施形態においては、離間部１２を被シール面２３１と離間する方向に傾斜する斜面としたが、シール部１Ａの外周側に向かって被シール面から離間する形状であれば、特に限定されず、例えば、凸曲面状、凹曲面状等の形状も用いることができる。 In the present embodiment, the separating portion 12 is an inclined surface that is inclined in a direction away from the sealed surface 231, but is not particularly limited as long as it has a shape that is separated from the sealed surface toward the outer peripheral side of the sealing portion 1 </ b> A. For example, shapes such as a convex curved surface shape and a concave curved surface shape can also be used.
　例えば、前記実施形態では、フランジ部２２においてヒートシール部２３の内周縁に沿って切込み２４を形成したが、切込み２４の代わりに表面層２１１の厚みを成形前の表面層２１１の厚みの１／２以下（より好ましくは１／５以下）とした薄肉部としてもよい。 For example, in the above embodiment, the notch 24 is formed along the inner peripheral edge of the heat seal portion 23 in the flange portion 22, but the thickness of the surface layer 211 is set to 1 / th of the thickness of the surface layer 211 before molding instead of the notch 24. It is good also as a thin part made into 2 or less (more preferably 1/5 or less).
　また、前記実施形態では、容器の形状を平面円形状としたが、これに限られず、平面矩形状やその他の形状でもよい。
　さらに、前記実施形態では、多層シート１０を表面層２１１と表下層２１２の２層からなる多層フィルムからなるものとしたが、多層シート１０は表面層２１１と表下層２１２の少なくとも２層を備えて入ればよく、３層以上の層からなる多層フィルムからなっていてもよい。 Moreover, in the said embodiment, although the shape of the container was planar circle shape, it is not restricted to this, A planar rectangular shape and another shape may be sufficient.
Furthermore, in the said embodiment, although the multilayer sheet 10 shall consist of a multilayer film which consists of 2 layers of the surface layer 211 and the surface layer 212, the multilayer sheet 10 is provided with the at least 2 layer of the surface layer 211 and the surface layer 212. What is necessary is just to enter, and it may consist of a multilayer film which consists of three or more layers.
　本発明の容器は、食品、薬品、化粧品などの内容物の容器に好適に用いることができる。 The container of the present invention can be suitably used as a container for contents such as foods, medicines and cosmetics.
　　　１　　シール盤
　　　１Ａ　シール部
　　　１Ｂ　剥離開始端形成部
　　１１　　平面部
　　１２　　離間部
　　１３　　平面部
　　２０　　容器本体
　　３０　　蓋材
　　２１　　開口部
　　２２　　フランジ部
　　２４　　切込み
　　１１１　凸曲面
　　２１１　表面層
　　２１２　表下層
　　２３１　被シール面 DESCRIPTION OF SYMBOLS 1 Seal board 1A Seal part 1B Peeling start end formation part 11 Plane part 12 Separation part 13 Plane part 20 Container body 30 Lid material 21 Opening part 22 Flange part 24 Cut 111 Convex curve 211 Surface layer 212 Surface lower layer 231 Sealed surface

Claims (10)

  1. 　基盤部とその一方の面に環形状のシール部を設けたシール盤であって、
    　前記シール部は、内周側に被シール面に対し平行な平面を有する平面部と、当該平面部に連続して設けられ、外周側に向かって被シール面から離間する離間部と、を備えることを特徴とするシール盤。     A seal board provided with a ring-shaped seal part on the base part and one surface thereof,
    The seal part includes a flat part having a plane parallel to the surface to be sealed on the inner peripheral side, and a separating part that is provided continuously with the flat part and is spaced from the surface to be sealed toward the outer peripheral side. A sealing board characterized by that.
  2. 　請求項１に記載のシール盤において、前記離間部は、前記シール部の外周側に向かって被シール面から離間する方向に傾斜する斜面であることを特徴とするシール盤。 2. The seal disc according to claim 1, wherein the separation portion is a slope inclined in a direction away from the surface to be sealed toward the outer peripheral side of the seal portion.
  3. 　請求項１または請求項２に記載のシール盤において、前記平面部は、前記シール部の内周側の端縁に前記被シール面に向けて凸形状に形成された凸曲面を有することを特徴とするシール盤。 3. The sealing plate according to claim 1, wherein the flat portion has a convex curved surface formed in a convex shape toward the sealed surface at an edge on an inner peripheral side of the sealing portion. A sealing board.
  4. 　請求項１から請求項３までのいずれか一項に記載のシール盤において、前記シール部の少なくとも一部には、剥離開始端形成部が隣接して設けられ、前記剥離開始端形成部は、前記シール部の外周縁から外周方向に向けて突出した形状に形成されていることを特徴とするシール盤。 In the seal disc according to any one of claims 1 to 3, at least a part of the seal portion is provided with a peeling start end forming portion adjacent to the peeling start end forming portion, A seal board characterized by being formed in a shape protruding from the outer peripheral edge of the seal portion toward the outer peripheral direction.
  5. 　請求項４に記載のシール盤において、前記剥離開始端形成部は、被シール面に押圧される面が被シール面に対し平行な平面からなることを特徴とするシール盤。 5. The seal disc according to claim 4, wherein the peeling start end forming portion has a plane that is pressed against the surface to be sealed and is parallel to the surface to be sealed.
  6. 　開口部の外周縁に延出して形成されたフランジ部を有する容器本体と、蓋材とを、前記フランジ部でヒートシールするシール方法であって、
    　請求項１から請求項５までのいずれか一項に記載のシール盤を、前記蓋材を介して前記フランジ部に押圧してヒートシールすることを特徴とするシール方法。     A sealing method for heat-sealing a container body having a flange portion formed by extending to an outer peripheral edge of an opening portion, and a lid member with the flange portion,
    A sealing method according to claim 1, wherein the sealing plate according to any one of claims 1 to 5 is pressed against the flange portion through the lid member and heat-sealed.
  7. 　請求項６記載のシール方法において、
    　前記容器本体は、前記フランジ部において蓋材とヒートシールされる表面層と当該表面層に隣接する表下層との少なくとも二層を備え、
    　前記表下層を構成する材料は、１６５℃における損失正接ｔａｎδの値が０．１８未満であることを特徴とするシール方法。     The sealing method according to claim 6.
    The container body includes at least two layers of a surface layer heat-sealed with a lid material in the flange portion and a surface layer adjacent to the surface layer,
    The material constituting the upper and lower layers has a loss tangent tan δ value at 165 ° C. of less than 0.18.
  8. 　請求項６または請求項７に記載のヒートシール方法において、
    　さらに、環状の外周シール盤により、前記容器本体と前記蓋材とを、前記フランジ部の前記シール盤でヒートシールされた部分の外周側においてヒートシールすることを特徴とするシール方法。     In the heat sealing method according to claim 6 or 7,
    Furthermore, the sealing method characterized by heat-sealing the said container main body and the said cover material in the outer peripheral side of the part heat-sealed with the said sealing disk of the said flange part with a cyclic | annular outer periphery sealing disk.
  9. 　開口部の外周縁に延出して形成されたフランジ部を有する容器本体と、蓋材とを備え、
    　請求項６から請求項８までのいずれか一項に記載のシール方法によりヒートシールされたことを特徴とする容器。     A container body having a flange formed to extend to the outer peripheral edge of the opening, and a lid;
    A container which is heat-sealed by the sealing method according to any one of claims 6 to 8.
  10. 　請求項９に記載の容器において、
    　前記フランジ部には、前記蓋材とヒートシールされる層に環状の切込みが設けられていることを特徴とする容器。     The container according to claim 9,
    The said flange part is provided with the cyclic | annular cut | notch in the layer heat-sealed with the said cover material, The container characterized by the above-mentioned.
PCT/JP2014/058594 2013-03-29 2014-03-26 Sealing plate, sealing method, and container WO2014157364A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700053553A1 (en) * 2017-05-17 2018-11-17 Cryovac Inc PACKAGED PRODUCT, EQUIPMENT AND PACKAGING METHOD FOR THE REALIZATION OF SUCH A PRODUCT PACKAGED

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102468967B1 (en) * 2015-06-01 2022-11-22 쇼와 덴코 패키징 가부시키가이샤 Container and packaging body
JP6888399B2 (en) * 2017-04-28 2021-06-16 凸版印刷株式会社 Paper container and its manufacturing method
JP7346805B2 (en) * 2018-10-01 2023-09-20 東洋製罐株式会社 Packaging bag, packaging bag manufacturing method, and pressing member

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61244703A (en) * 1985-04-12 1986-10-31 東洋アルミニウム株式会社 Sealed package and manufacture thereof
JPS62193907A (en) * 1986-02-19 1987-08-26 出光石油化学株式会社 Easily unsealable sealing method of vessel and device thereof
JPS62165204U (en) * 1986-04-07 1987-10-20
JPS63177201U (en) * 1987-05-01 1988-11-16
JPH0752906A (en) * 1993-08-12 1995-02-28 Idemitsu Petrochem Co Ltd Manufacture of seal container
WO2004076311A1 (en) * 2003-02-26 2004-09-10 Idemitsu Unitech Co., Ltd. Easily unsealable packaging body and method of manufacturing the same
JP2009102081A (en) * 2009-02-16 2009-05-14 Idemitsu Unitech Co Ltd Easily openable container, method of manufacturing easily openable container, and manufacturing apparatus for easily openable container

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61244703A (en) * 1985-04-12 1986-10-31 東洋アルミニウム株式会社 Sealed package and manufacture thereof
JPS62193907A (en) * 1986-02-19 1987-08-26 出光石油化学株式会社 Easily unsealable sealing method of vessel and device thereof
JPS62165204U (en) * 1986-04-07 1987-10-20
JPS63177201U (en) * 1987-05-01 1988-11-16
JPH0752906A (en) * 1993-08-12 1995-02-28 Idemitsu Petrochem Co Ltd Manufacture of seal container
WO2004076311A1 (en) * 2003-02-26 2004-09-10 Idemitsu Unitech Co., Ltd. Easily unsealable packaging body and method of manufacturing the same
JP2009102081A (en) * 2009-02-16 2009-05-14 Idemitsu Unitech Co Ltd Easily openable container, method of manufacturing easily openable container, and manufacturing apparatus for easily openable container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700053553A1 (en) * 2017-05-17 2018-11-17 Cryovac Inc PACKAGED PRODUCT, EQUIPMENT AND PACKAGING METHOD FOR THE REALIZATION OF SUCH A PRODUCT PACKAGED

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