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JP5931340B2 - Packaging container, packaging container manufacturing method and manufacturing apparatus - Google Patents

Packaging container, packaging container manufacturing method and manufacturing apparatus Download PDF

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Publication number
JP5931340B2
JP5931340B2 JP2010545730A JP2010545730A JP5931340B2 JP 5931340 B2 JP5931340 B2 JP 5931340B2 JP 2010545730 A JP2010545730 A JP 2010545730A JP 2010545730 A JP2010545730 A JP 2010545730A JP 5931340 B2 JP5931340 B2 JP 5931340B2
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JP
Japan
Prior art keywords
opening
packaging container
inclined portion
flange
respect
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2010545730A
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Japanese (ja)
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JPWO2010079709A1 (en
Inventor
隆洋 石黒
隆洋 石黒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Unitech Co Ltd
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Idemitsu Unitech Co Ltd
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Publication of JPWO2010079709A1 publication Critical patent/JPWO2010079709A1/en
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Publication of JP5931340B2 publication Critical patent/JP5931340B2/en
Expired - Fee Related legal-status Critical Current
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • 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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by the joining tool
    • 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
    • B29C66/81423—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 concave
    • 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
    • B29C66/81425—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 stepped, e.g. comprising a shoulder
    • 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
    • B29C66/81431—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 cavity, e.g. a groove
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Packages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Closures For Containers (AREA)

Description

本発明は、包装容器、包装容器の製造方法および製造装置に関する。 The present invention, packaging containers, the method and apparatus for producing packaging containers.

従来、食品類の包装形態としては、容器本体の開口部周縁にフランジ部を設けた容器本体とフィルム状の蓋材を備える構成とし、食品類を容器本体の内部に収納した後、かかる容器本体のフランジ部と蓋材をヒートシールして密封包装した蓋付き容器が広く用いられている。
このような蓋付き容器は、容器の内部に収納される食品類を安全に保存するという観点から、容器本体に設けられたフランジ部と蓋材をヒートシールし、かかるヒートシールにより形成されたシール部を剥がれにくくするといった高い密封性が必要とされるとともに、蓋材を開封する場合にあっては、当該蓋材を容器本体から簡便に剥離可能とする、密封性と易開封性という相反する特性を同時に具備する必要があった。Conventionally, as a packaging form of foods, the container body is provided with a container body provided with a flange on the periphery of the opening of the container body and a film-like lid material, and after the food is stored in the container body, the container body Containers with lids that are hermetically sealed by heat-sealing the flange portions and lid materials are widely used.
Such a container with a lid is a seal formed by heat-sealing the flange portion provided on the container body and the lid material from the viewpoint of safely storing food stored in the container. When the lid is opened, the lid is easily peelable from the container body, and there is a contradiction between hermeticity and easy opening. It was necessary to have the characteristics at the same time.

このような包装容器では、開封前の密封性が重要である一方、開封時の易開封性も求められている。そこで、樹脂材質を変えるなどして容器本体のシール層のシール強度を制御し、蓋材と容器本体の界面を剥離する技術が一般的に知られている。
例えば、特許文献１には、多層容器本体の層間接着力をフランジ部と蓋材との接着力よりも小さくなるように構成し、フランジ部近傍の切り欠き部やヒートシール部の内側に環状の切断線を設けた易開封性容器が記載されている。
また、特許文献２には、フランジ面に傾斜突部を形成し、フランジと蓋材とをヒートシールした場合に傾斜突部が溶融延出して樹脂溜り片を形成し、蓋材の最内層が樹脂溜り片を覆った状態で非接着ないし弱接着状態で連結された容器が記載されている。In such a packaging container, sealability before opening is important, but easy-openability at the time of opening is also required. In view of this, a technique is generally known in which the sealing strength of the sealing layer of the container body is controlled by changing the resin material and the interface between the lid material and the container body is peeled off.
For example, in Patent Document 1, an interlayer adhesive force of a multilayer container body is configured to be smaller than an adhesive force between a flange portion and a lid member, and an annular shape is formed inside a notch portion or a heat seal portion near the flange portion. An easy-open container with a cutting line is described.
In Patent Document 2, an inclined protrusion is formed on the flange surface, and when the flange and the cover material are heat sealed, the inclined protrusion melts and forms a resin pool piece, and the innermost layer of the cover material A container is described which is connected in a non-adhesive or weakly-adhered state with the resin reservoir covered.

さらに、特許文献３には、フランジ部に凸の湾曲シール面を有し、蓋材とヒートシールされた場合にはシール面の内外周部の少なくとも一方にはみ出し部が形成され、はみ出し部はシール中心方向が小さくなるように溝が形成された容器が記載されている。
そして、特許文献４および５には、多層シートからなるフランジ部と蓋材とを凸型シール盤で２回ヒートシールすることにより樹脂溜まりを形成する技術が記載されている。Further, Patent Document 3 has a convex curved sealing surface on the flange portion, and when heat-sealed with the lid member, a protruding portion is formed on at least one of the inner and outer peripheral portions of the sealing surface, and the protruding portion is sealed. A container is described in which a groove is formed so that the center direction becomes smaller.
Patent Documents 4 and 5 describe a technique for forming a resin reservoir by heat-sealing a flange portion made of a multilayer sheet and a lid material twice with a convex seal disc.

特開昭６３−９６０６０号公報JP-A 63-96060 特開平９−９９９３３号公報Japanese Patent Laid-Open No. 9-99933 特開昭６２−２８３５５号公報JP-A-62-28355 特開２００１−１０６５８号公報JP 2001-10658 A 特開平２−２１９７６７号公報JP-A-2-219767

しかしながら、特許文献１に記載の易開封性容器は実用化されてはいるものの、切り欠き部や切断線を設置する工程やシール位置の精度など、技術の難易度が高く汎用性にかけるという問題があった。
また、特許文献２に記載の突起をフランジ部に安定して得ることおよびシールにより形成される樹脂溜まりを安定して得ることは困難であるとともに、容器の厚みも増すことからコストが増大するという問題があった。
さらに、特許文献３においても、シールによる樹脂溜まりを安定して得ることは難しく、シールの外周側に樹脂溜まりが形成されてしまうと易開封性に劣ってしまう。なお、シールの外周側に樹脂溜まりを形成しないようにすることは実質的に不可能であるため安定した易開封性を得ることはできない。
そして、特許文献４および５では、凸型シール盤で２回シールすることにより樹脂溜まりを形成しているが、このような方法では、安定して樹脂溜まりを形成することは実用的に困難であり、また、易開封性を確保するためにシールの外周側に樹脂溜まりを形成しないようにすることは不可能である。
以上のように、容器の高密封性および易開封性を安定して得られず品質にばらつきが生じたり、その製造工程が複雑であったり、汎用性に欠けるという問題があった。However, although the easy-open container described in Patent Document 1 has been put into practical use, there is a problem that the technical difficulty is high, such as the process of installing the notch and the cutting line, and the accuracy of the seal position, and it is subject to versatility. was there.
In addition, it is difficult to stably obtain the protrusions described in Patent Document 2 in the flange portion and to stably obtain a resin reservoir formed by sealing, and the cost increases because the thickness of the container increases. There was a problem.
Furthermore, even in Patent Document 3, it is difficult to stably obtain a resin reservoir due to the seal, and if a resin reservoir is formed on the outer peripheral side of the seal, the easy-openability is poor. In addition, since it is practically impossible to prevent a resin reservoir from being formed on the outer peripheral side of the seal, stable easy-openability cannot be obtained.
In Patent Documents 4 and 5, a resin reservoir is formed by sealing twice with a convex seal disc. However, in such a method, it is practically difficult to form a resin reservoir stably. In addition, it is impossible to prevent a resin reservoir from being formed on the outer peripheral side of the seal in order to ensure easy opening.
As described above, there has been a problem that the high sealability and easy-openability of the container cannot be stably obtained, the quality varies, the manufacturing process is complicated, and the versatility is lacking.

本発明の目的は、安定した易開封性および密封性を備え、簡単な工程で製造することのできる包装容器、包装容器の製造方法および製造装置を提供することである。 An object of the present invention is to provide a stable easily openable and provided with a sealing property, packaging containers that can the be produced by a simple process, a manufacturing method of the packaging container and a manufacturing apparatus.

本発明の包装容器は、内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、前記フランジ部は、前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、前記フランジ部の第２の傾斜部と前記蓋材とが前記シール部でシールされるとともに、前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着されることを特徴とする。 The packaging container according to the present invention includes a container body provided with a concave portion for storing contents and a flange portion extending from the opening of the concave portion, and a seal portion between the flange portion and the opening. The container body has a multilayer sheet composed of at least two layers of a sealing layer and a base material layer, and the flange portion faces the surface of the opening from the periphery of the opening. a first inclined portion that will be extended to be inclined obliquely upward with respect to the direction, extends inclined obliquely downward from a peripheral edge of the first inclined portion with respect to the plane direction of the opening A second inclined portion that forms an apex angle portion by intersecting with the first inclined portion and is inclined at an angle of 30 ° or less with respect to a surface direction of the opening, and the flange The second inclined part of the part and the lid member are sealed by the seal part, Has a resin reservoir between the the wood first inclined portion through the resin reservoir and the lid member and the first inclined portion, characterized in that it is bonded.

この発明では、容器本体のフランジ部が第１の傾斜部と第２の傾斜部とを有し、第１の傾斜部と第２の傾斜部との交差により頂角部が形成される。第１の傾斜部は、開口部の面方向に対して斜め上方向に傾斜しているため、フランジ部の第２の傾斜部に蓋材をヒートシールしたとき、第１の傾斜部と蓋材との間に形成される隙間に蓋材のシール層が溶融して樹脂溜まり部が形成され、この樹脂溜まり部を介して蓋材と第１の傾斜部とが接着される。すなわち、容器本体の第１の傾斜部の形状によって、通常のシール方法で、シール部の内周縁側にのみ樹脂溜まりを簡単に形成することができる。
このような樹脂溜まりが形成された包装容器は、高密封性に優れるとともに、シール部の開封開始側には樹脂溜まりが形成されないので易開封性を維持することができる。 In this invention, the flange part of a container main body has a 1st inclination part and a 2nd inclination part, and an apex angle part is formed by intersection of a 1st inclination part and a 2nd inclination part. Since the first inclined portion is inclined obliquely upward with respect to the surface direction of the opening, when the lid material is heat sealed to the second inclined portion of the flange portion, the first inclined portion and the lid material The sealing layer of the lid material is melted in the gap formed between the two and the resin reservoir portion is formed, and the lid member and the first inclined portion are bonded via the resin reservoir portion. That is, depending on the shape of the first inclined portion of the container body, the resin reservoir can be easily formed only on the inner peripheral edge side of the seal portion by a normal sealing method.
The packaging container in which such a resin reservoir is formed is excellent in high sealing performance, and can be easily opened because no resin reservoir is formed on the opening start side of the seal portion.

本発明の包装容器において、前記第１の傾斜部は、前記開口部の面方向に対して９０°未満の角度で傾斜していることが好ましい。 The packaging container of this invention WHEREIN: It is preferable that the said 1st inclination part inclines at an angle of less than 90 degrees with respect to the surface direction of the said opening part.

この発明では、第１の傾斜部が開口部の面方向に対して９０°未満の角度で傾斜している。これにより、フランジ部に蓋材をシールバーでヒートシールしたとき、第１の傾斜部と第２の傾斜部との交差により形成される頂角部がシールバーで押圧され、頂角部の角度が広がる方向、すなわち容器本体の外方へ向かってフランジ部が延出される。このとき、シールバーのシール面は、第２の傾斜部に沿ってシールされるため、蓋材と第１の傾斜部との間に樹脂溜まり部が形成されやすい。したがって、樹脂溜まりの形成にばらつきのない安定した包装容器を容易に製造することができる。 In the present invention, the first inclined portion is inclined at an angle of less than 9 0 ° with respect to the plane direction of the opening. Thereby, when the lid material is heat-sealed to the flange portion with the seal bar, the apex angle portion formed by the intersection of the first inclined portion and the second inclined portion is pressed by the seal bar, and the angle of the apex angle portion The flange portion extends in a direction in which the flange extends, that is, outward of the container body. At this time, since the seal surface of the seal bar is sealed along the second inclined portion, a resin pool portion is easily formed between the lid member and the first inclined portion. Therefore, a stable packaging container having no variation in the formation of the resin reservoir can be easily manufactured.

本発明の包装容器において、前記第１の傾斜部は、前記開口部の面方向に対して１５°以上かつ８０°以下の角度で傾斜していることが好ましい。
また、前記第２の傾斜部は、前記開口部の面方向に対して５°以上かつ３０°以下の角度で傾斜していることが好ましい。 The packaging container of this invention WHEREIN: It is preferable that the said 1st inclination part inclines at an angle of 15 degrees or more and 80 degrees or less with respect to the surface direction of the said opening part.
Moreover, it is preferable that the said 2nd inclination part inclines at an angle of 5 degrees or more and 30 degrees or less with respect to the surface direction of the said opening part.

この発明では、第１の傾斜部が前記開口部の面方向に対して１５°以上かつ８０°以下の角度で傾斜しているので、蓋材をフランジ部に載置したときに蓋材と第１の傾斜部との間に隙間ができやすく、樹脂溜まりが形成されやすい。
また、第２の傾斜部が前記開口部の面方向に対して５°以上かつ３０°以下の角度で傾斜しているので、蓋材をフランジ部に載置してヒートシールしたときに、蓋材と第２の傾斜部との間にシール部が安定して形成される。
以上のように、フランジ部の内周側にのみ樹脂溜まりを安定して形成することができるので、品質にばらつきのない包装容器を容易に製造することができる。In the present invention, since the first inclined portion is inclined at an angle of 15 ° or more and 80 ° or less with respect to the surface direction of the opening, the lid member and the first member are placed when the lid member is placed on the flange portion. A gap is easily formed between the first inclined portion and the resin reservoir.
In addition, since the second inclined portion is inclined at an angle of 5 ° or more and 30 ° or less with respect to the surface direction of the opening portion, the lid member is placed on the flange portion and heat-sealed. A seal portion is stably formed between the material and the second inclined portion.
As described above, since the resin reservoir can be stably formed only on the inner peripheral side of the flange portion, a packaging container having no variation in quality can be easily manufactured.

本発明の包装容器において、前記開口部の面方向に対する前記第１の傾斜部の傾斜角度Ａおよび前記第２の傾斜部の傾斜角度Ｂは、Ａ≧Ｂの関係を満たすことが好ましい。 The packaging container of this invention WHEREIN: It is preferable that the inclination angle A of the said 1st inclination part with respect to the surface direction of the said opening part and the inclination angle B of the said 2nd inclination part satisfy | fill the relationship of A> = B.

この発明では、第１の傾斜部の傾斜角度Ａは第２の傾斜部の傾斜角度Ｂ以上の角度を有している。これにより、前述のようにシールバーでヒートシールした場合に、シールバーのシール面が第２の傾斜部に沿いやすいので、より蓋材と第１の傾斜部との間に樹脂溜まり部が形成されやすい。したがって、シール部の内周縁側に樹脂溜まり部を確実に形成することができるので、より安定した包装容器を提供することができる。   In the present invention, the inclination angle A of the first inclined portion is greater than or equal to the inclination angle B of the second inclined portion. As a result, when heat sealing is performed with the seal bar as described above, the seal surface of the seal bar is likely to follow the second inclined portion, so that a resin pool portion is further formed between the lid member and the first inclined portion. Easy to be. Therefore, since the resin reservoir can be reliably formed on the inner peripheral edge side of the seal portion, a more stable packaging container can be provided.

本発明の包装容器において、前記樹脂溜まり部は、断面烏口形状であることが好ましい。
この発明では、樹脂溜まり部は、断面烏口形状に形成される。このような形状であれば、蓋材と第１の傾斜部との間に垂れた樹脂溜まりに内圧がかかるため、より高密封性に優れる。また、開封する際には樹脂溜まり部が開封を妨げない。したがって、易開封性を維持することができる。The packaging container of this invention WHEREIN: It is preferable that the said resin reservoir part is a cross-sectional mouth shape.
In the present invention, the resin reservoir is formed in a cross-sectional shape. With such a shape, since the internal pressure is applied to the resin reservoir drooped between the lid member and the first inclined portion, the sealing performance is more excellent. Further, when opening, the resin reservoir does not prevent the opening. Therefore, easy-openability can be maintained.

本発明の包装容器において、前記樹脂溜まり部は、前記容器本体の前記頂角部の樹脂をせり出させた形状であることが好ましい。
この発明では、第１の傾斜部が開口部の面方向に対して４０°以上かつ８０°以下の傾斜角度で蓋材をフランジ部に載置してヒートシールした場合には、樹脂溜まり部は、蓋材と第１の傾斜部との間に容器側の頂角部の樹脂がせり出した樹脂せり出し部を有する形状とすることができる。
樹脂せり出し部は、容器内に内容物を満杯に充填させた場合でも安定して形成させることができ、樹脂溜まり部に内圧がかかることで、高い密封性を得ることができる。The packaging container of this invention WHEREIN: It is preferable that the said resin reservoir part is the shape which protruded the resin of the said apex part of the said container main body.
In this invention, when the first inclined portion is heat-sealed by placing the lid member on the flange portion at an inclination angle of 40 ° or more and 80 ° or less with respect to the surface direction of the opening, the resin reservoir portion is A shape having a resin protruding portion in which the resin at the apex portion on the container side protrudes between the lid member and the first inclined portion.
The resin protruding portion can be stably formed even when the contents are fully filled in the container, and high sealing performance can be obtained by applying an internal pressure to the resin reservoir portion.

本発明の包装容器において、前記シール層が凝集剥離することにより開封されることが好ましい。
本発明の包装容器では、蓋材または容器本体のうち少なくともいずれか一方のシール層に剥離層を設けることができる。剥離層としては、凝集剥離タイプ、層間剥離タイプ等があるが、包装容器を開封した際にひげと呼ばれる不良現象が発生しにくいという観点から、凝集剥離タイプの剥離層を設けることが好ましい。
これによれば、蓋材がヒートシールされた包装容器を開封するとき、シール層が凝集破壊することにより凝集剥離するため易開封性に優れるとともに、蓋材とシール層との間で剥離しないので密封性に優れた包装容器を提供することができる。In the packaging container of the present invention, it is preferable that the sealing layer is opened by cohesive peeling.
In the packaging container of this invention, a peeling layer can be provided in at least any one sealing layer among a cover material or a container main body. As the release layer, there are an aggregation release type, an interlayer release type, and the like. However, it is preferable to provide an aggregation release type release layer from the viewpoint that a defective phenomenon called a whisker hardly occurs when the packaging container is opened.
According to this, when opening the packaging container in which the lid material is heat-sealed, the seal layer is cohesive and peeled due to cohesive failure, so it is excellent in easy-opening property and does not peel between the lid material and the seal layer. It is possible to provide a packaging container having excellent sealing properties.

本発明の包装容器の製造方法は、内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、前記フランジ部は、前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着される包装容器の製造方法であって、前記容器本体の凹部を成形する成形凹部、前記成形凹部の開口部周縁に設けられ、前記開口部の面方向に対して斜め上方向に傾斜する第１の傾斜面、および前記第１の傾斜面との交差により頂角部を形成する第２の傾斜面を有する金型を用いて、前記フランジ部に前記第１の傾斜部および前記第２の傾斜部を成形することを特徴とする。 The method for manufacturing a packaging container according to the present invention includes a container body provided with a recess for storing contents and a flange portion extending from the opening of the recess, and between the flange portion and the opening. And the container body has a multilayer sheet composed of at least two layers of a seal layer and a base material layer, and the flange portion opens from the periphery of the opening portion to the opening. a first inclined portion that will be extended to be inclined obliquely upward with respect to the surface direction of the section, inclined obliquely downward from a peripheral edge of the first inclined portion with respect to the plane direction of the opening A second inclined portion that extends and forms an apex portion by intersecting with the first inclined portion, and is inclined at an angle of 30 ° or less with respect to the surface direction of the opening. And a resin reservoir portion between the lid member and the first inclined portion, and the resin reservoir portion A method of manufacturing a packaging container with the first inclined portion and the lid member is adhered to, molded recess for forming the recess of the container body, provided in the opening portion peripheral edge of the molding recess, the opening Using a mold having a first inclined surface inclined obliquely upward with respect to the surface direction of the portion, and a second inclined surface forming a vertex portion by intersecting with the first inclined surface , The first inclined portion and the second inclined portion are formed on the flange portion.

この発明では、容器本体の凹部を成形する際に、フランジ部の第１の傾斜部および第２の傾斜部も同時に成形する。このように、金型を用いて成形することにより、所望の形状の容器本体を確実に製造することができる。このようにして得られた容器本体は、ヒートシールしたときに確実に前述の樹脂溜まり部が形成されるので、安定して高品質の製品を提供することができる。   In the present invention, when the concave portion of the container body is formed, the first inclined portion and the second inclined portion of the flange portion are simultaneously formed. Thus, the container main body of a desired shape can be reliably manufactured by shaping | molding using a metal mold | die. Since the container body obtained in this way is surely formed with the aforementioned resin reservoir when heat-sealed, a high-quality product can be provided stably.

本発明の包装容器の製造装置は、内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、前記フランジ部は、前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着される包装容器の製造装置であって、前記容器本体の凹部を成形する成形凹部、前記成形凹部の開口部周縁に設けられ、前記開口部の面方向に対して斜め上方向に傾斜する第１の傾斜面、および前記第１の傾斜面との交差により頂角部を形成する第２の傾斜面を有する金型を備えたことを特徴とする。 An apparatus for manufacturing a packaging container according to the present invention includes a container body including a concave portion in which contents are stored and a flange portion extending from an opening portion of the concave portion, and the flange portion between the container body and the flange portion. And the container body has a multilayer sheet composed of at least two layers of a seal layer and a base material layer, and the flange portion opens from the periphery of the opening portion to the opening. a first inclined portion that will be extended to be inclined obliquely upward with respect to the surface direction of the section, inclined obliquely downward from a peripheral edge of the first inclined portion with respect to the plane direction of the opening A second inclined portion that extends and forms an apex portion by intersecting with the first inclined portion, and is inclined at an angle of 30 ° or less with respect to the surface direction of the opening. And a resin reservoir portion between the lid member and the first inclined portion, and the resin reservoir portion A device for manufacturing a packaging container in which the lid member and the first inclined portion are bonded to each other, the molding recess forming the recess of the container body, provided at the periphery of the opening of the molding recess, and the opening A mold having a first inclined surface that is inclined obliquely upward with respect to the surface direction of the portion, and a second inclined surface that forms an apex portion by intersecting with the first inclined surface. Features.

この発明では、金型の成形凹部は容器本体の凹部を成形する。また、第１の傾斜面および第２の傾斜面により、前述の形状のフランジ部を成形することができる。このような製造装置に多層シートを導入して金型に押し当てるだけで、簡単にフランジ部を成形することができる。すなわち、確実に所望の形状の容器本体を製造することができるので、安定して高品質の製品を提供することができる。 In the present invention, the molding recess of the mold molds the recess of the container body . Also, the first inclined surface and a second inclined surface, it is possible to form the flange portion of the aforementioned shapes. The flange portion can be easily formed simply by introducing the multilayer sheet into such a manufacturing apparatus and pressing it against the mold. That is, since a container body having a desired shape can be reliably manufactured, a high-quality product can be stably provided.

本発明の実施形態における包装容器であって、蓋材で密封された状態を示す斜視図。The perspective view which is the packaging container in embodiment of this invention, Comprising: The state sealed with the cover material. 本発明の実施形態における包装容器であって、包装容器の一部が開封された状態を示す斜視図。It is a packaging container in an embodiment of the present invention, and is a perspective view showing the state where a part of packaging container was opened. 前記実施形態において蓋材をシールする前の容器本体の一部を示す拡大断面図。The expanded sectional view which shows a part of container main body before sealing a cover material in the said embodiment. 図１ＡのＩＩＩ−ＩＩＩ断面図。III-III sectional drawing of FIG. 1A. 図３の包装容器を開封した状態を示す拡大断面図。The expanded sectional view which shows the state which opened the packaging container of FIG. 前記実施形態において容器本体を製造する方法を示す断面図。Sectional drawing which shows the method of manufacturing a container main body in the said embodiment. 前記実施形態においてフランジ部に蓋材をシールする前の状態を示す断面図。Sectional drawing which shows the state before sealing a cover material to a flange part in the said embodiment. 前記実施形態においてフランジ部に蓋材をシールするためにシールバーを押し当てた状態を示す断面図。Sectional drawing which shows the state which pressed the seal bar in order to seal a cover material to a flange part in the said embodiment. 前記実施形態においてフランジ部に蓋材をシールした後の状態を示す断面図。Sectional drawing which shows the state after sealing a cover material to the flange part in the said embodiment. 本発明の別の実施形態の容器本体の一部を示す拡大断面図。The expanded sectional view which shows a part of container main body of another embodiment of this invention. 本発明のさらに別の実施形態の容器本体の一部を示す拡大断面図。The expanded sectional view which shows a part of container main body of another embodiment of this invention. 本発明のまたさらに別の実施形態の容器本体の一部を示す拡大断面図。The expanded sectional view which shows a part of container main body of another embodiment of this invention.

以下、本発明の一実施形態を図面に基づいて説明する。
図１Ａおよび図１Ｂは本発明の実施形態における包装容器を示した図であって、図１Ａは蓋材で密封された状態、図１Ｂは包装容器の一部が開封された状態を示す斜視図である。図２は、前記実施形態において蓋材をシールする前の容器本体の一部を示す拡大断面図である。図３は、図１ＡのＩＩＩ−ＩＩＩ断面図である。図４は、図３の包装容器を開封した状態を示す拡大断面図である。図５は、前記実施形態において容器本体を製造する方法を示す断面図である。図６Ａ〜図６Ｃは、前記実施形態においてフランジ部に蓋材をシールする工程を示した図であって、図６Ａはシール前の状態、図６Ｂはシールバーを押し当てた状態、図６Ｃはシール後の状態を示す断面図である。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1A and 1B are diagrams showing a packaging container according to an embodiment of the present invention. FIG. 1A is a perspective view showing a state where the packaging container is sealed, and FIG. 1B is a perspective view showing a state where a part of the packaging container is opened. It is. FIG. 2 is an enlarged cross-sectional view showing a part of the container body before sealing the lid member in the embodiment. 3 is a cross-sectional view taken along the line III-III in FIG. 1A. FIG. 4 is an enlarged cross-sectional view showing a state where the packaging container of FIG. 3 is opened. FIG. 5 is a cross-sectional view showing a method for manufacturing a container body in the embodiment. 6A to 6C are views showing a process of sealing the lid material to the flange portion in the embodiment, FIG. 6A is a state before sealing, FIG. 6B is a state where a seal bar is pressed, and FIG. It is sectional drawing which shows the state after sealing.

〔１．包装容器の構成〕
図１Ａにおいて、包装容器１は、内容物Ｐが凹部２１に収納される平面略円形状の容器本体２０を備え、この容器本体２０は、その中心部に平面略円形に形成された開口部２２を塞ぐため蓋材３０が開口部２２の周縁に配設されたフランジ部２３にヒートシールされている。このフランジ部２３と蓋材３０とのヒートシールは環状のシール部４０で行われる。包装容器１は、図１Ｂに示すように、蓋材３０の一部が突出した把持部３１を把持してシール部４０でシールされた蓋材３０をフランジ部２３から剥離して開封されるものである。[1. Configuration of packaging container
In FIG. 1A, the packaging container 1 includes a planar substantially circular container main body 20 in which the contents P are stored in the recess 21. The container main body 20 has an opening 22 formed in a substantially planar planar shape at the center thereof. In order to close the cover, the lid member 30 is heat-sealed to a flange portion 23 disposed on the periphery of the opening 22. The heat seal between the flange portion 23 and the lid member 30 is performed by an annular seal portion 40. As shown in FIG. 1B, the packaging container 1 is opened by gripping a grip part 31 from which a part of the cover material 30 protrudes and peeling the cover material 30 sealed by the seal part 40 from the flange part 23. It is.

［１−１．容器本体の構成］
容器本体２０は、図２に示すように、シール層２５１と中間層２５２と基材層２５３とからなる多層シート２５で形成されている。
シール層２５１は、蓋材３０にヒートシールされシール部４０を形成する。そして、包装容器１は、シール層２５１が凝集剥離することにより開封される。このようなシール層２５１を構成する樹脂としては、例えば、エチレン−アクリル酸エステル−無水マレイン酸共重合体やスチレングラフトプロピレン樹脂の少なくとも一つを、ポリプロピレン系樹脂にブレンドして得られた樹脂組成物が挙げられる。この場合にあっては、エチレン−アクリル酸エステル−無水マレイン酸共重合体やスチレングラフトプロピレン樹脂は、ポリプロピレン系樹脂１００質量部に対して、好ましくは１０質量部以上かつ５０質量部以下、特に好ましくは１５質量部以上かつ４０質量部以下の範囲で添加するようにすればよい。[1-1. Container body configuration]
As shown in FIG. 2, the container body 20 is formed of a multilayer sheet 25 including a sealing layer 251, an intermediate layer 252, and a base material layer 253.
The seal layer 251 is heat sealed to the lid member 30 to form the seal portion 40. Then, the packaging container 1 is opened when the sealing layer 251 is agglomerated and peeled off. Examples of the resin constituting the sealing layer 251 include a resin composition obtained by blending at least one of an ethylene-acrylic acid ester-maleic anhydride copolymer and a styrene-grafted propylene resin with a polypropylene resin. Things. In this case, the ethylene-acrylic ester-maleic anhydride copolymer and the styrene-grafted propylene resin are preferably 10 parts by weight and 50 parts by weight, particularly preferably 100 parts by weight of the polypropylene resin. May be added in the range of 15 parts by mass or more and 40 parts by mass or less.

中間層２５２は、シール層２５１に隣接して設けられる層であり、構成材料としては、例えば、ポリプロピレン系樹脂、ポリエチレン系樹脂等のオレフィン系樹脂やポリスチレン系樹脂、ポリエチレンテレフタレート（ＰＥＴ）等のポリエステル系樹脂等の材料、及びこれらのブレンド材料を用いることができる。   The intermediate layer 252 is a layer provided adjacent to the seal layer 251, and examples of the constituent material include olefin resins such as polypropylene resins and polyethylene resins, polystyrene resins, and polyesters such as polyethylene terephthalate (PET). A material such as a resin and a blended material thereof can be used.

基材層２５３は、容器本体２０の外部に現れる層であり、構成する樹脂としては、ポリプロピレン系樹脂、ポリエチレン系樹脂等のオレフィン系樹脂やポリスチレン系樹脂、ポリエチレンテレフタレート（ＰＥＴ）等のポリエステル系樹脂等の材料、エチレンビニルアルコール共重合体及びこれらのブレンド材料の単層シートまたは積層シートを使用することができる。
これらの積層シートには、層の間に接着層や酸素吸収樹脂層を設けてもよい。接着層の構成材料としては、例えば、ウレタン系またはスチレン系のエラストマー、無水マレイン酸変性ポリプロピレンおよびエチレン酢酸ビニル（ＥＶＡ）などが挙げられる。また、酸素吸収樹脂層としては、例えば、エチレンビニルアルコール共重合体（ＥＶＯＨ）などが挙げられる。The base material layer 253 is a layer that appears outside the container body 20, and the constituent resin is an olefin resin such as polypropylene resin or polyethylene resin, a polystyrene resin, or a polyester resin such as polyethylene terephthalate (PET). Etc., ethylene vinyl alcohol copolymers, and single layer sheets or laminated sheets of blended materials thereof can be used.
These laminated sheets may be provided with an adhesive layer or an oxygen-absorbing resin layer between the layers. Examples of the constituent material of the adhesive layer include urethane-based or styrene-based elastomers, maleic anhydride-modified polypropylene, and ethylene vinyl acetate (EVA). Moreover, as an oxygen absorption resin layer, an ethylene vinyl alcohol copolymer (EVOH) etc. are mentioned, for example.

上記の樹脂を、共押出し、ドライラミネーション、押出ラミネーション、押出コーティングやこれらの組み合わせで、シール層２５１／中間層２５２／基材層２５３からなる多層シート２５を作製できる。なお、各層の厚み、樹脂選定や配合比率等により、各層の接着強度を調節することができる。   The multilayer sheet 25 which consists of the sealing layer 251 / intermediate layer 252 / base material layer 253 can be produced by co-extrusion of the above resin, dry lamination, extrusion lamination, extrusion coating, or a combination thereof. In addition, the adhesive strength of each layer can be adjusted by the thickness of each layer, resin selection, a mixture ratio, etc.

凹部２１は、内容物Ｐが収納される収納部２１１と、収納部２１１に段差を有して連続的に設けられ、凹部２１の開口部を形成する段差部２１２と、で形成される。
図３に示すように、フランジ部２３は、この段差部２１２の周縁から延設された第１の傾斜部２３１と、第１の傾斜部２３１の周縁から延設された第２の傾斜部と、を有する。
第１の傾斜部２３１は、段差部２１２の周縁から開口部２２の面方向に対して斜め上方向に延設される。本実施形態では開口部２２の面方向に対する傾斜角度Ａが３０°となるように延設される。なお、傾斜角度Ａは、９０°未満であることが好ましい。
第２の傾斜部２３２は、第１の傾斜部２３１の周縁から開口部２２の面方向に対して斜め下方向に延設される。本実施形態では、開口部２２の面方向に対する傾斜角度Ｂが１５°となるように延設される。なお、傾斜角度Ｂは、９０°未満であることが好ましい。
また、第１の傾斜部２３１および第２の傾斜部２３２が開口部２２の面方向に対してなす傾斜角度ＡおよびＢは、Ａ≧Ｂとなるように形成することが好ましい。
このように形成された第１の傾斜部２３１および第２の傾斜部２３２の交差により頂角部２３３が形成される。The concave portion 21 is formed by a storage portion 211 in which the contents P are stored, and a step portion 212 that is continuously provided with a step in the storage portion 211 and forms an opening of the concave portion 21.
As shown in FIG. 3, the flange portion 23 includes a first inclined portion 231 extending from the periphery of the step portion 212, and a second inclined portion extending from the periphery of the first inclined portion 231. Have.
The first inclined portion 231 extends obliquely upward from the peripheral edge of the step portion 212 with respect to the surface direction of the opening 22. In this embodiment, it extends so that the inclination angle A with respect to the surface direction of the opening 22 may be 30 °. The inclination angle A is preferably less than 90 °.
The second inclined part 232 extends obliquely downward from the peripheral edge of the first inclined part 231 with respect to the surface direction of the opening 22. In this embodiment, it extends so that the inclination angle B with respect to the surface direction of the opening part 22 may be 15 degrees. The inclination angle B is preferably less than 90 °.
Further, it is preferable that the inclination angles A and B formed by the first inclined portion 231 and the second inclined portion 232 with respect to the surface direction of the opening portion 22 are set such that A ≧ B.
The vertex portion 233 is formed by the intersection of the first inclined portion 231 and the second inclined portion 232 formed in this way.

［１−２．蓋材の構成］
蓋材３０は、図２に示されるように、シーラント層３２１と外層３２２との２層構成の積層体３２で形成されている。
シーラント層３２１は、容器本体２０のシール層２５１にヒートシールされる層である。シーラント層３２１を構成する樹脂としては、例えば、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。なお、シーラント層３２１を形成する樹脂のメルトインデックス（ＭＩ）は、３ｇ／１０分以上かつ３０ｇ／１０分以下の範囲であることが好ましい。ＭＩは、上述の範囲内で高いほど、樹脂溜まり部３３を烏口形状に安定して形成することができる。
シーラント層３２１の厚みは、３０μｍ以上かつ８０μｍ以下の範囲であることが好ましい。シーラント層の厚みは、上述の範囲内で厚いほど樹脂溜まり部３３を烏口形状に安定して形成することができる。[1-2. Lid composition]
As shown in FIG. 2, the lid member 30 is formed of a laminate 32 having a two-layer structure of a sealant layer 321 and an outer layer 322.
The sealant layer 321 is a layer that is heat sealed to the seal layer 251 of the container body 20. As the resin constituting the sealant layer 321, for example, random polypropylene (RPP), block polypropylene (BPP), linear low density polyethylene (LLDPE), polyethylene, or the like can be used. The melt index (MI) of the resin forming the sealant layer 321 is preferably in the range of 3 g / 10 min or more and 30 g / 10 min or less. The higher the MI is within the above range, the more stably the resin reservoir 33 can be formed in the shape of the mouth.
The thickness of the sealant layer 321 is preferably in the range of 30 μm or more and 80 μm or less. As the thickness of the sealant layer is increased within the above range, the resin reservoir 33 can be stably formed in the shape of the mouth.

外層３２２は、ポリエチレンテレフタレート（ＰＥＴ）フィルム、二軸延伸ナイロンフィルム（Ｏ−Ｎｙ）等を使用することができる。   For the outer layer 322, a polyethylene terephthalate (PET) film, a biaxially stretched nylon film (O-Ny), or the like can be used.

なお、蓋材３０は２層構成に限られず、例えば、ＰＥＴ１２μｍ／ＯＮｙ（二軸延伸ナイロン）１５μｍ／Ｌ−ＬＤＰＥ（低密度ポリエチレン）６０μｍ、ＰＥＴ１２μｍ／ＯＮｙ１５μｍ／ＣＰＰ（無延伸ポリプロピレン）６０μｍなどの層構成としてもよい。これらの積層シートの製造は、共押出し、熱ラミネーション、ドライラミネーション等で行うことができ、さらには、これらを段階的に組み合わせることでも行うことができる。   The lid member 30 is not limited to a two-layer structure. For example, PET 12 μm / ONy (biaxially stretched nylon) 15 μm / L-LDPE (low density polyethylene) 60 μm, PET 12 μm / ONy15 μm / CPP (unstretched polypropylene) 60 μm, etc. It is good also as a structure. These laminated sheets can be produced by coextrusion, thermal lamination, dry lamination, or the like, and can also be carried out by combining them stepwise.

［１−３．包装容器の構成］
上述の容器本体２０のフランジ部２３と蓋材３０とがヒートシールされると、図３に示すように、シール層２５１とシーラント層３２１との間にシール部４０が形成されるとともに、シール部４０の内周縁近傍に樹脂溜まり部３３が形成される。
シール部４０のシール強度は、蓋材３０を剥離する際に、シール層２５１とシーラント層３２１との間で剥離しない程度の強度が必要である。
樹脂溜まり部３３は、蓋材３０のシーラント層３２１がヒートシールの熱により溶融し、溶融した樹脂が垂れて、蓋材３０とフランジ部２３の第１の傾斜部２３１との間に烏口形状に形成される。[1-3. Configuration of packaging container]
When the flange portion 23 and the lid member 30 of the container body 20 are heat-sealed, a seal portion 40 is formed between the seal layer 251 and the sealant layer 321 as shown in FIG. A resin reservoir 33 is formed in the vicinity of the inner peripheral edge of 40.
The sealing portion 40 needs to have a sealing strength that does not peel between the seal layer 251 and the sealant layer 321 when the lid member 30 is peeled off.
The resin reservoir 33 is shaped like a lip between the lid member 30 and the first inclined portion 231 of the flange portion 23 when the sealant layer 321 of the lid member 30 is melted by heat of heat sealing and the melted resin hangs down. It is formed.

〔２．包装容器の開封〕
このような構成の包装容器１の開封について図４に基づいて説明する。
密封された包装容器１の把持部３１を把持したまま蓋材３０を開封する方向へ引っ張ると、シール部４０の開口側端部４１付近で容器本体２０のシール層２５１が凝集破壊され、シール層２５１において凝集剥離する。この凝集剥離がシール部４０の内周側端部４２を過ぎて樹脂溜まり部３３に達すると、樹脂溜まり部３３とシール層２５１との境界で剥離され、包装容器１は開封される。
〔３．容器本体の製造装置〕
次に、本実施形態の容器本体２０を製造する製造装置について図５を用いて説明する。
容器本体２０は、プラグアシスト真空成形、プラグアシスト圧空成形等の公知の方法で多層シート２５に熱成形を行うことで形成される。
製造装置５は、多層シート２５から容器本体２０を熱成形する装置であり、多層シート２５の開口部２２が形成される側とは反対側に配置される金型５１と、フランジ部２３を挟んで金型５１の反対側に配置されたフランジ押さえ５２と、容器本体２０の開口部２２を形成するプラグ５３と、を備えている。[2. Opening the packaging container)
The opening of the packaging container 1 having such a configuration will be described with reference to FIG.
When the lid member 30 is pulled in the opening direction while holding the grip portion 31 of the sealed packaging container 1, the seal layer 251 of the container body 20 is coherently broken in the vicinity of the opening-side end portion 41 of the seal portion 40. In 251, the flocculent peeling occurs. When this cohesive peeling passes through the inner peripheral side end portion 42 of the seal portion 40 and reaches the resin reservoir portion 33, it is peeled off at the boundary between the resin reservoir portion 33 and the seal layer 251, and the packaging container 1 is opened.
[3. Container body manufacturing equipment)
Next, the manufacturing apparatus which manufactures the container main body 20 of this embodiment is demonstrated using FIG.
The container body 20 is formed by thermoforming the multilayer sheet 25 by a known method such as plug assist vacuum forming or plug assist pressure forming.
The manufacturing apparatus 5 is an apparatus for thermoforming the container body 20 from the multilayer sheet 25, and sandwiches the mold 51 disposed on the side opposite to the side on which the opening 22 of the multilayer sheet 25 is formed, and the flange portion 23. And a flange presser 52 disposed on the opposite side of the mold 51 and a plug 53 that forms the opening 22 of the container body 20.

金型５１には、容器本体２０の開口部２２を形成するための成形凹部５１１が中央に形成されており、この成形凹部５１１の上端縁にはフランジ部２３を成形するためのフランジ成形部５１２が形成されている。金型５１は、本実施形態では、φ８０ｍｍのカップ用の金型である。
フランジ成形部５１２は、開口部２２の面方向に対して３０°の傾斜角度を有する第１の傾斜面５１３と、開口部２２の面方向に対して１５°の傾斜角度を有する第２の傾斜面５１４と、を有している。これらの第１の傾斜面５１３および第２の傾斜面５１４により、フランジ成形部５１２は全体的に凸状に形成されている。A molding recess 511 for forming the opening 22 of the container body 20 is formed at the center of the mold 51, and a flange molding portion 512 for molding the flange portion 23 at the upper edge of the molding recess 511. Is formed. In this embodiment, the mold 51 is a mold for a φ80 mm cup.
The flange forming portion 512 includes a first inclined surface 513 having an inclination angle of 30 ° with respect to the surface direction of the opening 22 and a second inclination having an inclination angle of 15 ° with respect to the surface direction of the opening 22. A surface 514. By the first inclined surface 513 and the second inclined surface 514, the flange forming portion 512 is formed in a convex shape as a whole.

フランジ押さえ５２は、金型５１のフランジ成形部５１２とともに多層シート２５を押さえることで、容器本体２０のフランジ部２３を成形するものである。
フランジ押さえ５２は、金型５１の成形凹部５１１の開口部の外縁に沿って環状に形成され、金型５１のフランジ成形部５１２と対向する押さえ面５２１を有している。押さえ面５２１は、フランジ成形部５１２に嵌合するように、開口部２２の面方向に対して３０°の傾斜角度を有する第１の適合面５２１Ａと、開口部２２の面方向に対して１５°の傾斜角度を有する第２の適合面５２１Ｂとを有しており、フランジ押さえ５２は、凹状に形成されている。The flange retainer 52 forms the flange portion 23 of the container body 20 by pressing the multilayer sheet 25 together with the flange forming portion 512 of the mold 51.
The flange presser 52 is formed in an annular shape along the outer edge of the opening of the molding recess 511 of the mold 51, and has a pressing surface 521 that faces the flange molding part 512 of the mold 51. The pressing surface 521 has a first matching surface 521A having an inclination angle of 30 ° with respect to the surface direction of the opening 22 and 15 with respect to the surface direction of the opening 22 so as to be fitted to the flange forming portion 512. The flange fitting 52 is formed in a concave shape.

以上のように、凸状に形成されたフランジ成形部５１２と凹状に形成されたフランジ押さえ５２とが、多層シート２５を介して嵌合することにより、フランジ部２３を成形する。
また、フランジ押さえ５２は金型５１とともに１０℃以上１６０℃以下の範囲で調温可能とされている。
さらに、フランジ押さえ５２はスプリング５４に連結されており、ばね定数の異なるばねに交換することによって圧力が調整可能となっている。As described above, the flange forming portion 512 formed in a convex shape and the flange presser 52 formed in a concave shape are fitted through the multilayer sheet 25 to form the flange portion 23.
Further, the flange presser 52 can be adjusted in the temperature range of 10 ° C. or more and 160 ° C. or less together with the mold 51.
Further, the flange presser 52 is connected to a spring 54, and the pressure can be adjusted by exchanging with a spring having a different spring constant.

プラグ５３は、金型５１の成形凹部５１１よりも小さい径で略同形状に形成され、多層シート２５を挟んで成形凹部５１１に嵌合する。
以上のような製造装置５により、多層シート２５を金型５１とフランジ押さえ５２及びプラグ５３との間に送り、この状態でフランジ押さえ５２及びプラグ５３を金型５１側に移動させることで、内容物を収納するための凹部２１とフランジ部２３とが多層シート２５に一度に成形され、容器本体２０を成形することができる。The plug 53 is formed in substantially the same shape with a smaller diameter than the molding recess 511 of the mold 51, and fits into the molding recess 511 with the multilayer sheet 25 interposed therebetween.
By the manufacturing apparatus 5 as described above, the multilayer sheet 25 is fed between the mold 51 and the flange retainer 52 and the plug 53, and in this state, the flange retainer 52 and the plug 53 are moved to the mold 51 side. The concave portion 21 and the flange portion 23 for storing objects are formed in the multilayer sheet 25 at a time, and the container body 20 can be formed.

〔４．包装容器の製造方法〕
次に、本実施形態の包装容器１を製造する方法について説明する。
まず、加熱されて軟化した多層シート２５が前述の製造装置５に導入される。多層シート２５が金型５１の上面側に到達したところで、プラグ５３を多層シート２５に接近させる。この場合、プラグ５３と多層シート２５とで囲まれた空間は密閉状態となる。そして、多層シート２５を予備成形するとともに、プラグ５３の多層シート２５と面する側に設けられた図示しない圧空チャンバーにより高圧空気を注入して圧空状態にしながら成形凹部５１１に押しつけ、プラグアシスト圧空成形を行う。[4. (Manufacturing method of packaging container)
Next, a method for manufacturing the packaging container 1 of the present embodiment will be described.
First, the heated and softened multilayer sheet 25 is introduced into the manufacturing apparatus 5 described above. When the multilayer sheet 25 reaches the upper surface side of the mold 51, the plug 53 is brought close to the multilayer sheet 25. In this case, the space surrounded by the plug 53 and the multilayer sheet 25 is sealed. Then, the multilayer sheet 25 is preformed, and high-pressure air is injected into a compressed air chamber (not shown) provided on the side of the plug 53 facing the multilayer sheet 25 and pressed against the molding recess 511 while being in a compressed air state, thereby performing plug-assisted pneumatic molding. I do.

また、この工程と同時に、フランジ押さえ５２を金型５１のフランジ成形部５１２に押しあて、フランジ部２３を形成する。フランジ押さえ５２は、圧力が１．５ｋｇ／ｃｍ２以上２０ｋｇ／ｃｍ２以下の範囲となるようにスプリング５４にて調製される。圧力が１．５ｋｇ／ｃｍ２未満、または２０ｋｇ／ｃｍ２を超えると、フランジ部２３を所望の厚みに形成することが困難となる。また、フランジ押さえ５２の温度は１０℃以上１６０℃以下の範囲となるように調製される。温度が１６０℃を超えると、シール層２５１に使用されている樹脂の融点に近づくため、成形自体が不安定になるおそれがある。フランジ押さえ５２の温度のより好ましい範囲は１００℃以上１２０℃以下である。At the same time as this step, the flange presser 52 is pressed against the flange forming portion 512 of the mold 51 to form the flange portion 23. The flange retainer 52 is prepared by the spring 54 so that the pressure is in the range of 1.5 kg / cm 2 or more and 20 kg / cm 2 or less. If the pressure is less than 1.5 kg / cm 2 or exceeds 20 kg / cm 2 , it is difficult to form the flange portion 23 in a desired thickness. Further, the temperature of the flange presser 52 is adjusted to be in the range of 10 ° C. or higher and 160 ° C. or lower. When the temperature exceeds 160 ° C., the melting point of the resin used for the seal layer 251 is approached, so that the molding itself may become unstable. A more preferable range of the temperature of the flange presser 52 is 100 ° C. or higher and 120 ° C. or lower.

次に、多層シート２５から成形された容器本体２０には、内容物Ｐとなる液体が注入・充填され、容器本体２０のフランジ部２３と蓋材３０とがヒートシールされる。
図６Ａ〜図６Ｃを用いて、ヒートシールの工程を説明する。まず、図６Ａにおいて、容器本体２０がヒートシールするためのシール台６に載置され、フランジ部２３の上面に蓋材３０が載せられる。そして、図６Ｂに示すように、加熱された環状のシールバー７が蓋材３０の上からフランジ部２３の頂角部２３３に押し当てられる。これにより、頂角部２３３の角度が大きくなる方向に第１の傾斜部２３１および第２の傾斜部２３２が角度を変えてフランジ部２３が変形し、シールバー７のシール面７１が蓋材３０を介して第２の傾斜部２３２に接触し、シール部４０が形成される。このとき、シールバー７の熱でシーラント層３２１が溶融し、この溶融樹脂がシーラント層３２１と第１の傾斜部２３１との間を埋めるように垂れて烏口形状の樹脂溜まり部３３が形成される。ヒートシールが終了してシールバー７による押圧をやめると、図６Ｃに示すように、第１の傾斜部２３１および第２の傾斜部２３２が元の形状に戻り、蓋材３０と第１の傾斜部２３１との間に樹脂溜まり部３３が形成されたシール状態となる。なお、シールバー７のシール面７１により、フランジ部２３の第２の傾斜部２３２が面圧接されてシール部４０が形成されるため、シール部４０の開口側に隙間が生じず樹脂溜まりは形成されない。
ヒートシールによる接着強度は、温度、圧力、時間等のヒートシール条件、各層の厚み、樹脂選定等により調節できる。Next, the container main body 20 formed from the multilayer sheet 25 is filled and filled with the liquid as the contents P, and the flange portion 23 of the container main body 20 and the lid member 30 are heat-sealed.
The heat sealing process will be described with reference to FIGS. 6A to 6C. First, in FIG. 6A, the container body 20 is placed on the sealing base 6 for heat sealing, and the lid member 30 is placed on the upper surface of the flange portion 23. Then, as shown in FIG. 6B, the heated annular seal bar 7 is pressed against the apex portion 233 of the flange portion 23 from above the lid member 30. As a result, the first inclined portion 231 and the second inclined portion 232 change the angle in the direction in which the angle of the apex angle portion 233 is increased, and the flange portion 23 is deformed, and the seal surface 71 of the seal bar 7 becomes the lid member 30. The second inclined portion 232 is contacted through the seal portion 40, and the seal portion 40 is formed. At this time, the sealant layer 321 is melted by the heat of the seal bar 7, and the molten resin hangs so as to fill the space between the sealant layer 321 and the first inclined portion 231, thereby forming a throat-shaped resin reservoir portion 33. . When the heat seal is finished and the pressing by the seal bar 7 is stopped, as shown in FIG. 6C, the first inclined portion 231 and the second inclined portion 232 return to their original shapes, and the lid member 30 and the first inclined portion The resin reservoir 33 is formed between the portion 231 and the sealing state. In addition, since the seal portion 71 is formed by pressure-contacting the second inclined portion 232 of the flange portion 23 by the seal surface 71 of the seal bar 7, no gap is formed on the opening side of the seal portion 40, and a resin pool is formed. Not.
The adhesive strength by heat sealing can be adjusted by heat sealing conditions such as temperature, pressure, and time, the thickness of each layer, resin selection, and the like.

したがって、本実施形態では、次の作用効果を奏することができる。
（１）容器本体２０のフランジ部２３の第１の傾斜部２３１が開口部２２の面方向に対して３０°の傾斜角度で形成されるとともに、第２の傾斜部２３２が開口部２２の面方向に対して１５°の傾斜角度で形成されている。このフランジ部２３と蓋材３０とをヒートシールすると、蓋材３０のシーラント層３２１が溶融して垂れ下がり、第１の傾斜部２３１と蓋材３０との間に烏口形状の樹脂溜まり部３３が形成される。
この樹脂溜まり部３３は、フランジ部２３のシール部４０の内周側端部４２側にのみ形成されるので、包装容器１の内圧強度が高くなり高密封性に優れる。また、開口側端部４１側には樹脂溜まりが形成されないので、易開封性を維持することができる。すなわち、高密封性と易開封性に優れた包装容器を提供することができる。Therefore, in the present embodiment, the following operational effects can be achieved.
(1) The first inclined portion 231 of the flange portion 23 of the container body 20 is formed at an inclination angle of 30 ° with respect to the surface direction of the opening portion 22, and the second inclined portion 232 is the surface of the opening portion 22. It is formed at an inclination angle of 15 ° with respect to the direction. When the flange portion 23 and the lid member 30 are heat-sealed, the sealant layer 321 of the lid member 30 melts and hangs down, and a throat-shaped resin reservoir 33 is formed between the first inclined portion 231 and the lid member 30. Is done.
Since the resin reservoir portion 33 is formed only on the inner peripheral side end portion 42 side of the seal portion 40 of the flange portion 23, the internal pressure strength of the packaging container 1 is increased and excellent in high sealing performance. Further, since the resin reservoir is not formed on the opening side end 41 side, easy-openability can be maintained. That is, it is possible to provide a packaging container excellent in high sealing performance and easy opening.

（２）また、フランジ部２３において、第１の傾斜部２３１を開口部２２の面方向に対して３０°の傾斜角度で形成し、第２の傾斜部２３２を開口部２２の面方向に対して１５°の傾斜角度で形成することにより、通常使用されるフラットな面を有するシールバー７でヒートシールするだけで、前述の樹脂溜まり部３３を形成することができる。すなわち、シール部４０の位置を調整しなくとも簡単にシール部４０の内周側端部４２側にのみ樹脂溜まり部３３を形成することができる。すなわち、簡単な製造方法で安定した高密封性および易開封性を備えた包装容器を製造することができる。 (2) In the flange portion 23, the first inclined portion 231 is formed at an inclination angle of 30 ° with respect to the surface direction of the opening portion 22, and the second inclined portion 232 is formed with respect to the surface direction of the opening portion 22. The above-described resin reservoir 33 can be formed simply by heat-sealing with a seal bar 7 having a flat surface that is normally used. That is, the resin reservoir 33 can be easily formed only on the inner peripheral end 42 side of the seal portion 40 without adjusting the position of the seal portion 40. That is, it is possible to manufacture a packaging container having stable high sealing performance and easy opening performance by a simple manufacturing method.

（３）一般的に使用されているシールバーを利用することができるので、特別なシール設備が必要でなく、導入コストを削減することができるとともに、製造方法を変える必要もなく、安定して包装容器１を供給することができる。 (3) Since a commonly used seal bar can be used, no special seal equipment is required, the introduction cost can be reduced, and there is no need to change the manufacturing method. The packaging container 1 can be supplied.

（４）金型５１にフランジ部２３を形成するためのフランジ成形部５１２を設けたので、通常の容器本体の成形方法により簡単に成形することができる。
そして、このように成形されたフランジ部２３は、略一定の厚みで形成されるので、容器本体２０の多層シート２５および各層の厚みを調整するなどの複雑な調整が必要ないため、簡単な工程で製造することができる。また、樹脂溜まり部３３を形成するためにフランジ部２３の厚みを厚くする必要もないので、材料コストおよび製造コストの低減を図ることができる。(4) Since the flange forming portion 512 for forming the flange portion 23 is provided in the mold 51, it can be easily formed by a normal container body forming method.
And since the flange part 23 shape | molded in this way is formed by substantially constant thickness, since complicated adjustments, such as adjusting the thickness of the multilayer sheet 25 and each layer of the container main body 20, are unnecessary, it is a simple process. Can be manufactured. Further, since it is not necessary to increase the thickness of the flange portion 23 in order to form the resin reservoir portion 33, the material cost and the manufacturing cost can be reduced.

（５）また、本実施形態では、金型５１とともに、フランジ成形部５１２と対向する押さえ面５２１を有するフランジ押さえ５２を用いている。このフランジ押さえ５２を多層シート２５を介してフランジ成形部５１２に押し当てることにより、フランジ部２３の厚み精度が向上し、安定した易開封性かつ高密封性に優れた包装容器を提供することができる。 (5) Moreover, in this embodiment, the flange holding | suppressing 52 which has the pressing surface 521 which opposes the flange molding part 512 with the metal mold | die 51 is used. By pressing the flange presser 52 against the flange forming portion 512 via the multilayer sheet 25, the thickness accuracy of the flange portion 23 is improved, and a packaging container excellent in stable easy-openability and high sealability is provided. it can.

なお、本発明は上述の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、改良等は本発明に含まれるものである。   In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.

例えば、上述の実施形態では、シール層２５１が凝集剥離することにより包装容器１が開封されたが、シール層２５１と隣接する中間層２５２との界面における界面剥離によって開封される構成であってもよい。
この場合、シール層２５１と中間層２５２との剥離強度よりも、シール層２５１と蓋材３０との剥離強度が大きくなるように設定されることが好ましい。例えば、シール層２５１と中間層２５２との剥離強度は、０．５ｋｇ／１５ｍｍ以上２．５ｋｇ／１５ｍｍ以下の範囲内に設定される。シール層２５１と中間層２５２との剥離強度が０．５ｋｇ／１５ｍｍ未満であると、密封性が損なわれるおそれがあり、また、２．５ｋｇ／１５ｍｍを超えると、シール層２５１を中間層２５２からなかなか剥離できず開封しづらくなる。剥離強度の好ましい範囲は、０．５ｋｇ／１５ｍｍ以上１．３ｋｇ／１５ｍｍ以下である。For example, in the above-described embodiment, the packaging container 1 is opened by the cohesive separation of the seal layer 251. However, even if the structure is opened by interface delamination at the interface between the seal layer 251 and the adjacent intermediate layer 252. Good.
In this case, it is preferable to set the peel strength between the seal layer 251 and the lid member 30 to be larger than the peel strength between the seal layer 251 and the intermediate layer 252. For example, the peel strength between the seal layer 251 and the intermediate layer 252 is set within a range of 0.5 kg / 15 mm to 2.5 kg / 15 mm. If the peel strength between the seal layer 251 and the intermediate layer 252 is less than 0.5 kg / 15 mm, the sealing performance may be impaired. If the peel strength exceeds 2.5 kg / 15 mm, the seal layer 251 is removed from the intermediate layer 252. Difficult to peel off and difficult to open. A preferable range of the peel strength is 0.5 kg / 15 mm or more and 1.3 kg / 15 mm or less.

このとき、シール層２５１の厚みは、１０μｍ以上１００μｍ以下の範囲であることが好ましく、容器の大きさ、用途によって適宜調製することができる。成形前のシール層２５１の厚みが１０μｍ未満であると、蓋材３０とシールしたときにシール層２５１が安定しないため、中間層２５２から剥離しづらくなる。また、シール層２５１の厚みが１００μｍを超えると、必要以上に厚くなるため実用的でない。中間層２５２の厚みは特に限定されないが、１０μｍ以上の範囲に形成するのが好ましい。中間層２５２の厚みが１０μｍ未満であると、基材層２５３と中間層２５２との間で剥離する恐れがある。なお、中間層２５２の厚みのより好ましい範囲は、５０μｍ以上である。   At this time, the thickness of the seal layer 251 is preferably in the range of 10 μm to 100 μm, and can be appropriately prepared depending on the size and use of the container. If the thickness of the sealing layer 251 before molding is less than 10 μm, the sealing layer 251 is not stable when sealed with the lid member 30, so that it is difficult to peel off from the intermediate layer 252. On the other hand, if the thickness of the seal layer 251 exceeds 100 μm, it is not practical because it becomes thicker than necessary. The thickness of the intermediate layer 252 is not particularly limited, but is preferably formed in a range of 10 μm or more. There exists a possibility that it may peel between the base material layer 253 and the intermediate | middle layer 252 as the thickness of the intermediate | middle layer 252 is less than 10 micrometers. Note that a more preferable range of the thickness of the intermediate layer 252 is 50 μm or more.

また、フランジ部２３は上述の実施形態の形状に限られず、ヒートシール時にシール部４０の内周側端部４２付近に樹脂溜まり部３３が形成される構成であればよい。例えば、図７Ａに示すように、段差部２１２と第１の傾斜部２３１とが曲面状に接続していてもよく、また、第１の傾斜部２３１と第２の傾斜部２３２とが曲面状に接続していてもよい。また、図７Ｂに示すように、第２の傾斜部２３２の端部から外方向に延設された端縁部２３４を有していてもよい。   Moreover, the flange part 23 is not restricted to the shape of the above-mentioned embodiment, What is necessary is just the structure where the resin pool part 33 is formed in the inner peripheral side edge part 42 vicinity of the seal part 40 at the time of heat sealing. For example, as shown in FIG. 7A, the step portion 212 and the first inclined portion 231 may be connected in a curved shape, and the first inclined portion 231 and the second inclined portion 232 are in a curved shape. You may connect to. Moreover, as shown to FIG. 7B, you may have the edge part 234 extended from the edge part of the 2nd inclination part 232 to the outward direction.

上述の実施形態では、ヒートシールの熱により蓋材側の樹脂を溶融させたが、容器側の樹脂を溶融させる構成、または、蓋材側および容器側の両側の樹脂を溶融させる構成であってもよい。
また、上述の実施形態では、樹脂溜まり部３３を烏口形状としたが、第１の傾斜部２３１が開口部２２の面方向に対して４０°以上かつ８０°以下の傾斜角度Ａ１で蓋材３０をフランジ部２３に載置してヒートシールした場合には、図８に示すように、樹脂溜まり部３３は、蓋材３０と第１の傾斜部２３１との間に容器側の頂角部の樹脂がせり出した樹脂せり出し部３４を有する形状とすることができる。そして、樹脂溜まり部３３は、樹脂せり出し部３４が蓋材３０のシーラント層３２１で覆われる形状とすることができる。
樹脂せり出し部３４は、容器１内に内容物Ｐを満杯に充填させた場合でも安定して形成させることができ、樹脂溜まり部３３に内圧がかかることで、高い密封性を得ることができる。In the above-described embodiment, the resin on the lid material side is melted by heat of heat sealing, but the resin on the container side is melted, or the resin on both the lid material side and the container side is melted. Also good.
Further, in the above-described embodiment, the resin reservoir 33 has the shape of a shed, but the first inclined portion 231 has an inclination angle A1 of 40 ° or more and 80 ° or less with respect to the surface direction of the opening 22. 8 is placed on the flange portion 23 and heat-sealed, as shown in FIG. 8, the resin reservoir portion 33 is formed between the lid member 30 and the first inclined portion 231 at the apex corner portion on the container side. It can be set as the shape which has the resin protrusion part 34 which resin protruded. The resin reservoir 33 can have a shape in which the resin protrusion 34 is covered with the sealant layer 321 of the lid member 30.
The resin protruding portion 34 can be stably formed even when the contents P are fully filled in the container 1, and high internal sealability can be obtained by applying an internal pressure to the resin reservoir portion 33.

さらに、上述の実施形態では、フランジ押さえ５２を用いてフランジ部２３を成形したが、フランジ押さえ５２を用いない構成としてもよい。これによれば、簡単な製造装置で容器本体を成形することができる。
そして、前記実施形態では、包装容器１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。Furthermore, although the flange part 23 was shape | molded using the flange presser 52 in the above-mentioned embodiment, it is good also as a structure which does not use the flange presser 52. FIG. According to this, a container main body can be shape | molded with a simple manufacturing apparatus.
And in the said embodiment, although the shape of the packaging container 1 was made into the planar circular shape, it is not restricted to this, A planar rectangular shape and another shape may be sufficient.

次に、実施例を挙げて本発明をさらに詳しく説明するが、本発明はこれらの実施例の記載内容に何ら制約されるものではない。   EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not restrict | limited at all to the content of description of these Examples.

＜容器本体の製造＞
一般的に使用されているディストリビュータ方式共押出多層シート製造装置により、容器本体に使用するシートを製造した。シートは、以下に示す６層の多層シートである。
１．シール層：
ポリプロピレン（プライムポリマー株式会社製「Ｅ−１０５ＧＭ」）７０質量％とエチレンアクリル酸エステル−無水マレイン酸共重合体（日本ポリエチレン製「レクスパール ＥＴ２２０Ｘ」）３０質量％の混合樹脂
２．中間層：
ポリプロピレン（プライムポリマー株式会社製「Ｅ−１０５ＧＭ」）８０質量％とポリエチレン（宇部丸善ポリエチレン製「Ｒ−３００」）２０質量％の混合樹脂
３．接着層１：
無水マレイン酸変性ポリプロピレン（三菱化学製「モディックＡＰ Ｐ５０２」）
４．ＥＶＯＨ層：株式会社クラレ製「エバールＪ」
５．接着層２：接着層１に同じ
６．基材層：中間層に同じ<Manufacture of container body>
A sheet used for the container body was manufactured by a commonly used distributor type coextrusion multilayer sheet manufacturing apparatus. The sheet is a 6-layer multilayer sheet shown below.
1. Seal layer:
1. Mixed resin of 70% by mass of polypropylene (“E-105GM” manufactured by Prime Polymer Co., Ltd.) and 30% by mass of ethylene acrylate-maleic anhydride copolymer (“Lexpearl ET220X” manufactured by Nippon Polyethylene) Middle layer:
2. Mixed resin of 80% by mass of polypropylene (“E-105GM” manufactured by Prime Polymer Co., Ltd.) and 20% by mass of polyethylene (“R-300” manufactured by Ube Maruzen Polyethylene) Adhesive layer 1:
Maleic anhydride-modified polypropylene ("Modic AP P502" manufactured by Mitsubishi Chemical)
4). EVOH layer: "Eval J" manufactured by Kuraray Co., Ltd.
5. Adhesive layer 2: same as adhesive layer 1 6. Base material layer: Same as intermediate layer

上記の多層シートを用いて、実施形態で用いたプラグアシスト＋フランジクランプ真空圧空成形により、図１Ａに記載の包装容器を成形した。各種条件は以下の通りである。
成形金型：輪郭φ８０の丸型、５ｍｍ幅の金型フランジを有するカップ型を用い、金型フランジの外周側角度（前記実施形態の傾斜角度Ｂ）および内周側角度（前記実施形態の傾斜角度Ａ）をそれぞれ変えて容器本体を作成した（表１参照）。
フランジ押さえ：金型フランジに嵌合するようにそれぞれの金型フランジの外周側角度および内周側角度に応じた押さえ面を有する。Using the multilayer sheet, the packaging container shown in FIG. 1A was formed by plug assist + flange clamp vacuum / pressure forming used in the embodiment. Various conditions are as follows.
Mold: A round mold having a contour φ80 and a cup mold having a mold flange with a width of 5 mm, and an outer peripheral side angle (inclination angle B in the above embodiment) and an inner peripheral side angle (inclination in the above embodiment). Container bodies were prepared by changing the angles A) (see Table 1).
Flange holding: It has holding surfaces according to the outer peripheral side angle and inner peripheral side angle of each mold flange so as to be fitted to the mold flange.

＜蓋材のシール＞
蓋材としては、ポリエチレンテレフタレート（ＰＥＴ、１２μｍ）／二軸延伸ナイロン（ＯＮｙ、１５μｍ）／無延伸ポリプロピレン（ＣＰＰ、６０μｍ）のラミネートフィルムを用いた。
得られた容器本体のフランジ部に、上記ラミネートフィルムのＣＰＰ面をあて、温度１９０℃、シール圧力１５０ｋｇ／個、シール時間１．２秒の条件で、ＰＥＴ面からシールバーを押し当ててヒートシールを行い、接着した。なお、シールバーは、以下の２種類を用いた。
Ｘ．φ７５〜φ６５の環状に形成され、全面にわたってフラットな当たり面を有する。
Ｙ．φ７５〜φ６５の環状に形成され、全面にわたってフラットな当たり面を有するとともに、一部が径方向外側に向けて烏口形状に突出した突出部を有する。<Seal for lid>
As the lid material, a laminate film of polyethylene terephthalate (PET, 12 μm) / biaxially stretched nylon (ONy, 15 μm) / unstretched polypropylene (CPP, 60 μm) was used.
Heat seal by pressing the seal bar from the PET surface under the conditions of 190 ° C., sealing pressure 150 kg / piece, sealing time 1.2 seconds, with the CPP surface of the laminate film applied to the flange portion of the obtained container body And bonded. The following two types of seal bars were used.
X. It is formed in an annular shape of φ75 to φ65 and has a flat contact surface over the entire surface.
Y. It is formed in an annular shape of φ75 to φ65, has a flat contact surface over the entire surface, and part thereof has a protruding portion that protrudes in the shape of a hook toward the outside in the radial direction.

＜その他の容器＞
上述の包装容器のほかにも、比較例１として特開平９−９９９３３に記載の包装容器、比較例２として特開平２−２１９７６７に記載の包装容器、比較例３として特開昭６３−９６０６０に記載の包装容器を作成した。<Other containers>
In addition to the above-described packaging containers, Comparative Example 1 is a packaging container described in JP-A-9-99933, Comparative Example 2 is a packaging container described in JP-A-2-219767, and Comparative Example 3 is disclosed in JP-A 63-96060. The described packaging container was made.

＜評価＞
上記の方法で、以下の表１に示す実施例１〜１２、比較例１〜３の包装容器を作成し、内圧強度測定と、開封部でのピール強度測定と、開封感およびシール調整の難易度の評価を実施した。評価方法および評価結果は以下のとおりである。
１．内圧強度測定
（株）サン科学製の破裂強度測定器を用い、ＪＩＳ−Ｚ０２３８に準拠して試験を行った。具体的には蓋材の外表面に粘着性ゴムシート片を貼り付け、この粘着性ゴムシート片に針を差込み、空気を送り込んで容器破裂時の強度を測定した。
２．ピール強度測定
（株）ＩＭＡＤＡ製のデジタルフォールゲージを用い、ＪＩＳ−Ｚ０２３８に準じた試験を行った。具体的には蓋材をヒートシールした包装容器を１５ｍｍ幅にカットし、蓋材の開封開始側を容器本体のフランジ面に対し１３５°の角度で引っ張り、剥離されるときの強度を測定した。<Evaluation>
By the above method, packaging containers of Examples 1 to 12 and Comparative Examples 1 to 3 shown in Table 1 below are prepared, and the internal pressure strength measurement, the peel strength measurement at the opening portion, the unsealing feeling, and the difficulty in adjusting the seal Evaluation of degree was carried out. Evaluation methods and evaluation results are as follows.
1. Internal pressure strength measurement The test was conducted according to JIS-Z0238 using a burst strength measuring instrument manufactured by Sun Science Co., Ltd. Specifically, an adhesive rubber sheet piece was affixed to the outer surface of the lid member, a needle was inserted into the adhesive rubber sheet piece, and air was fed to measure the strength at the time of container rupture.
2. Peel Strength Measurement A test according to JIS-Z0238 was performed using a digital fall gauge manufactured by IMADA. Specifically, the packaging container heat-sealed with the lid was cut into a width of 15 mm, and the opening start side of the lid was pulled at an angle of 135 ° with respect to the flange surface of the container body, and the strength when peeled was measured.

３．開封感
以下の基準で評価した。
Ａ：全くきれいに開封し、開封感も良好。
Ｂ：シール層に２ｍｍ以内のひげ状の伸びが確認されるが、開封は良好。
Ｃ：シール層に２ｍｍ以上のひげ状の伸びが発生し、なんとか開封できるものの易開封感は損なわれる。
４．シール調整の難易度の評価
以下の基準で評価した。
Ａ：シール調整の必要はほとんどない。
Ｂ：シール温度等の調整が必要であった。
Ｃ：シール位置やシールバーの当たりに精度が求められるため、位置、当たり、圧力等の調整が必要で、これらの調整に必要なシール機も限定される。3. Unsealed feeling The following criteria were used for evaluation.
A: The package is completely opened and the opening feeling is good.
B: Whisker-like elongation within 2 mm is confirmed in the seal layer, but the opening is good.
C: Whisker-like elongation of 2 mm or more occurs in the seal layer, and although it can be opened somehow, the easy opening feeling is impaired.
4). Evaluation of difficulty of seal adjustment Evaluation was made according to the following criteria.
A: Almost no need for seal adjustment.
B: Adjustment of seal temperature etc. was required.
C: Since accuracy is required for the seal position and the contact with the seal bar, adjustment of the position, contact, pressure, etc. is necessary, and the sealing machines necessary for these adjustments are also limited.

Figure 0005931340
Figure 0005931340

表１からわかるように、実施例１〜８では、内圧強度、開封強度、開封感およびシール調整において良好な結果が得られている。特に、実施例８ではシールバーＹを用いることで、より良い開封感が得られている。
また、実施例９では内周側角度Ａが外周側角度Ｂよりも小さいため、開封強度がやや大きい。実施例１０では外周側角度Ｂが小さいため、開封強度がやや大きい。実施例１１では内周側角度Ａが小さいために内圧強度がやや低下している。実施例１２では内周側角度Ａが大きいために内圧強度がやや低下している。しかしながら、実施例９〜１２では、シール調整が良好であるので、汎用的に製造することが可能である。
一方、比較例１および比較例２では、開封強度および開封感に劣り、比較例３では内圧強度および開封強度に関しては実用上問題ないが、これらの比較例１〜３ではシール調整が困難であった。As can be seen from Table 1, in Examples 1 to 8, good results were obtained in internal pressure strength, opening strength, opening feeling, and seal adjustment. Particularly, in Example 8, a better opening feeling is obtained by using the seal bar Y.
Moreover, in Example 9, since the inner peripheral side angle A is smaller than the outer peripheral side angle B, the opening strength is slightly high. In Example 10, since the outer peripheral side angle B is small, the opening strength is slightly high. In Example 11, since the inner peripheral side angle A is small, the internal pressure strength is slightly reduced. In Example 12, since the inner peripheral side angle A is large, the internal pressure strength is slightly reduced. However, in Examples 9-12, since seal adjustment is favorable, it can be manufactured for general use.
On the other hand, Comparative Example 1 and Comparative Example 2 are inferior in opening strength and opening feeling, and Comparative Example 3 has no practical problem with respect to internal pressure strength and opening strength, but in Comparative Examples 1 to 3, it is difficult to adjust the seal. It was.

本発明は、例えば、レトルト食品等の各種食品や薬品、化粧品等に包装容器として広く利用することができる。   The present invention can be widely used as a packaging container for various foods such as retort foods, medicines, cosmetics, and the like.

１…包装容器
２０…容器本体
２１…凹部
２２…開口部
２３…フランジ部
２３１…第１の傾斜部
２３２…第２の傾斜部
２３３…頂角部
２５…多層シート
２５１…シール層
２５２…中間層
２５３…基材層
３０…蓋材
３２…積層体
３２１…シーラント層
３２２…外層
４０…シール部
４１…開口側端部
４２…内周側端部
５…製造装置
６…シール台
７…シールバー
Ｐ…内容物DESCRIPTION OF SYMBOLS 1 ... Packaging container 20 ... Container main body 21 ... Concave part 22 ... Opening part 23 ... Flange part 231 ... 1st inclination part 232 ... 2nd inclination part 233 ... Vertex angle part 25 ... Multilayer sheet 251 ... Sealing layer 252 ... Intermediate | middle layer 253 ... Base material layer 30 ... Cover material 32 ... Laminate 321 ... Sealant layer 322 ... Outer layer 40 ... Sealing part 41 ... Opening side end 42 ... Inner peripheral side end 5 ... Manufacturing device 6 ... Sealing base 7 ... Seal bar P …Contents

Claims (9)

内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、
前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、
前記フランジ部は、
前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、
前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、
前記フランジ部の第２の傾斜部と前記蓋材とが前記シール部でシールされるとともに、
前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、
この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着される
ことを特徴とする包装容器。 A container body having a recess for storing the contents and a flange extending from the opening of the recess; and a lid that closes the opening and is sealed between the flange by a seal portion; With
The container body has a multilayer sheet composed of at least two layers of a seal layer and a base material layer,
The flange portion is
A first inclined portion that will be extended to be inclined obliquely upward with respect to the plane direction of the opening from the peripheral edge of the opening,
The opening extending from the periphery of the first inclined portion in an obliquely downward direction with respect to the surface direction of the opening, and forming an apex angle portion by intersecting with the first inclined portion; A second inclined portion that is inclined at an angle of 30 ° or less with respect to the surface direction,
The second inclined portion of the flange portion and the lid member are sealed by the seal portion,
A resin reservoir between the lid and the first inclined portion;
The packaging container, wherein the lid member and the first inclined portion are bonded via the resin reservoir. 請求項１に記載の包装容器において、
前記第１の傾斜部は、前記開口部の面方向に対して９０°未満の角度で傾斜している
ことを特徴とする包装容器。 The packaging container according to claim 1,
The packaging container, wherein the first inclined part is inclined at an angle of less than 90 ° with respect to the surface direction of the opening. 請求項１または請求項２に記載の包装容器において、
前記第１の傾斜部は、前記開口部の面方向に対して１５°以上かつ８０°以下の角度で傾斜している
ことを特徴とする包装容器。 In the packaging container according to claim 1 or 2,
The packaging container, wherein the first inclined portion is inclined at an angle of 15 ° or more and 80 ° or less with respect to the surface direction of the opening. 請求項１から請求項３のいずれかに記載の包装容器において、
前記開口部の面方向に対する前記第１の傾斜部の傾斜角度Ａおよび前記第２の傾斜部の傾斜角度Ｂは、Ａ≧Ｂの関係を満たす
ことを特徴とする包装容器。 In the packaging container according to any one of claims 1 to 3,
The packaging container, wherein an inclination angle A of the first inclined portion and an inclination angle B of the second inclined portion with respect to the surface direction of the opening satisfy a relationship of A ≧ B. 請求項１から請求項４のいずれかに記載の包装容器において、
前記樹脂溜まり部は、断面烏口形状である
ことを特徴とする包装容器。 In the packaging container according to any one of claims 1 to 4,
The said resin reservoir part is a cross-sectional lip shape. The packaging container characterized by the above-mentioned. 請求項１から請求項４のいずれかに記載の包装容器において、
前記樹脂溜まり部は、前記容器本体の前記頂角部の樹脂をせり出させた形状である
ことを特徴とする包装容器。 In the packaging container according to any one of claims 1 to 4,
The packaging container, wherein the resin reservoir has a shape in which the resin at the apex portion of the container body is squeezed out. 請求項１から請求項６のいずれかに記載の包装容器において、
前記シール層が凝集剥離することにより開封される
ことを特徴とする包装容器。 The packaging container according to any one of claims 1 to 6,
The packaging container is opened by the cohesive peeling of the sealing layer. 内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、
前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、
前記フランジ部は、
前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、
前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、
前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、
この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着される包装容器の製造方法であって、
前記容器本体の凹部を成形する成形凹部、前記成形凹部の開口部周縁に設けられ、前記開口部の面方向に対して斜め上方向に傾斜する第１の傾斜面、および前記第１の傾斜面との交差により頂角部を形成する第２の傾斜面を有する金型を用いて、前記フランジ部に前記第１の傾斜部および前記第２の傾斜部を成形する
ことを特徴とする包装容器の製造方法。 A container body having a recess for storing the contents and a flange extending from the opening of the recess; and a lid that closes the opening and is sealed between the flange by a seal portion; With
The container body has a multilayer sheet composed of at least two layers of a seal layer and a base material layer,
The flange portion is
A first inclined portion that will be extended to be inclined obliquely upward with respect to the plane direction of the opening from the peripheral edge of the opening,
The opening extending from the periphery of the first inclined portion in an obliquely downward direction with respect to the surface direction of the opening, and forming an apex angle portion by intersecting with the first inclined portion; A second inclined portion that is inclined at an angle of 30 ° or less with respect to the surface direction,
A resin reservoir between the lid and the first inclined portion;
A method of manufacturing a packaging container in which the lid and the first inclined portion are bonded via the resin reservoir,
A molding recess that molds the recess of the container main body, a first inclined surface that is provided at a peripheral edge of the opening of the molding recess and is inclined obliquely upward with respect to the surface direction of the opening, and the first inclined surface The first inclined portion and the second inclined portion are formed on the flange portion using a mold having a second inclined surface that forms an apex portion by crossing with the packaging container. Manufacturing method. 内容物が収納される凹部とこの凹部の開口部から延設されたフランジ部とを備えた容器本体と、前記開口部を塞ぐとともに前記フランジ部との間をシール部でシールされた蓋材と、を備え、
前記容器本体は、少なくともシール層と基材層の２層からなる多層シートを有し、
前記フランジ部は、
前記開口部の周縁から前記開口部の面方向に対して斜め上方向に傾斜して延設される第１の傾斜部と、
前記第１の傾斜部の周縁から前記開口部の面方向に対して斜め下方向に傾斜して延設され、前記第１の傾斜部との交差により頂角部を形成する、前記開口部の面方向に対して３０°以下の角度で傾斜している第２の傾斜部と、を有し、
前記蓋材と前記第１の傾斜部との間に樹脂溜まり部を有し、
この樹脂溜まり部を介して前記蓋材と前記第１の傾斜部とが接着される包装容器の製造装置であって、
前記容器本体の凹部を成形する成形凹部、前記成形凹部の開口部周縁に設けられ、前記開口部の面方向に対して斜め上方向に傾斜する第１の傾斜面、および前記第１の傾斜面との交差により頂角部を形成する第２の傾斜面を有する金型を備えた
ことを特徴とする包装容器の製造装置。 A container body having a recess for storing the contents and a flange extending from the opening of the recess; and a lid that closes the opening and is sealed between the flange by a seal portion; With
The container body has a multilayer sheet composed of at least two layers of a seal layer and a base material layer,
The flange portion is
A first inclined portion that will be extended to be inclined obliquely upward with respect to the plane direction of the opening from the peripheral edge of the opening,
The opening extending from the periphery of the first inclined portion in an obliquely downward direction with respect to the surface direction of the opening, and forming an apex angle portion by intersecting with the first inclined portion; A second inclined portion that is inclined at an angle of 30 ° or less with respect to the surface direction,
A resin reservoir between the lid and the first inclined portion;
A packaging container manufacturing apparatus in which the lid member and the first inclined portion are bonded via the resin reservoir,
A molding recess that molds the recess of the container main body, a first inclined surface that is provided at a peripheral edge of the opening of the molding recess and is inclined obliquely upward with respect to the surface direction of the opening, and the first inclined surface An apparatus for manufacturing a packaging container, comprising: a mold having a second inclined surface that forms an apex portion by intersecting with the first and second surfaces.
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