JP2874956B2 - 易開封性包装体の製造方法 - Google Patents

易開封性包装体の製造方法

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Publication number
JP2874956B2
JP2874956B2 JP2126947A JP12694790A JP2874956B2 JP 2874956 B2 JP2874956 B2 JP 2874956B2 JP 2126947 A JP2126947 A JP 2126947A JP 12694790 A JP12694790 A JP 12694790A JP 2874956 B2 JP2874956 B2 JP 2874956B2
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JP
Japan
Prior art keywords
container
sealing
layer
lid
seal layer
Prior art date
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Expired - Fee Related
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JP2126947A
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English (en)
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JPH0431203A (ja
Inventor
健一 中越
忠夫 高垣
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.)
Sumitomo Bakelite Co Ltd
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Sumitomo Bakelite Co Ltd
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Priority to JP2126947A priority Critical patent/JP2874956B2/ja
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Publication of JP2874956B2 publication Critical patent/JP2874956B2/ja
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Classifications

    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • 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
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72321—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 comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/7234—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 comprising a barrier layer
    • B29C66/72341—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 comprising a barrier layer for gases
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/949—Measuring or controlling the joining process by measuring or controlling the time characterised by specific time values or ranges

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、フランジ部を有するプラスチック製容器と
蓋材とからなる包装体において、容易に開封することの
できる密封包装体の製造方法に関するものである。
〔従来の技術〕
従来から行なわれている、プラスチック包装体の易開
封性方法で最も一般的なものは、蓋材のシール層の材質
を様々な樹脂の配合物にすることによって、容器とのシ
ール強度を適度に、（例えば、600〜1000g/15mm）制御
し、蓋材と容器の界面をピールして開封するものであ
る。
ところがシール強度はシール条件、環境温度、内容物
の付着等の影響を受け易く、上下にバラツキが生じる。
下方にバラツキが生じると、時にはシール漏れの事故
になる危険性を有している。逆に上方にバラツキが生じ
るとピール性が悪くなり、容易に開封することができな
くなる。シール漏れは致命的な欠陥であるため、シール
温度や圧力を高目に設定する等で上方にバラツキを持た
せているのが一般的である。そのため全般に開封が困難
であった。
また、この困難さを克服する為にシール層とその隣接
層とのデラミネーションによる開封する方法もしられて
いる（例えば特公昭50−37598号公報）が通常のシール
ではシール層がうまく破断せず、内容物を取出しにくい
ということが生じる欠点があった。これらの方法（層間
剥離タイプ）の易開封性包装体においては、さらに安定
したものを得ようとしてシール層に切り込み線を入れた
り、またヒートシール時にシール層の樹脂の樹脂溜まり
を形成させる等の方法が種々提案されている。
これらの易開封性包装体の製造方法としては、特開昭
63−96061号公報、特開昭63−11018号公報等（シール層
面に切り込みを線状にいれる方法）が提案されている。
しかしながら、これらの方法では、正確な位置に切り
込み線を入れることは非常に難しく、さらにこれらの切
り込み線に掛からないように蓋材のシール位置を制御す
ることは容易でなく、安定した密封性や易開封性を有す
る包装体を得ることは困難であった。
〔発明が解決しようとする課題〕
本発明は、シール漏れの危険が無く、しかもシール条
件に左右されずに、安定した易開封性が得られる包装体
を得んとして研究した結果、容器のフランジ部のシール
層と隣接する隣接層の構成樹脂を適宜選択し、容器と蓋
材とをシールする前に予め容器に適当にホーン形状及び
受け台形状を選択して超音波処理を行うことにより、シ
ール層と隣接層界面ラミネート強度を変化させることが
できるという知見を得、更にこの知見に基づき種々研究
を進めて本発明を完成するに至ったものである。
〔課題を解決するための手段〕
本発明は容器がシール層と該シール層と隣接層を少な
くとも有し、該シール層と該隣接層とのラミネート強度
が300〜2000g/25mmである多層シートから形成したフラ
ンジ部を有し、該シール層の厚みが10〜70μである容器
であって、 該容器を容器受台に供給する第１の工程、 多数の微小凸部を有する超音波発振ホーンを用いて該
容器のフランジ部の蓋材とのシール面を超音波処理する
第２の工程、 内容物を充填する第３の工程、 蓋材を該容器の超音波処理した面とをシール強度が該
容器のシール層と隣接層とのラミネート強度より大きく
なるようにヒートシールする第４の工程、 蓋材を容器のフランジ形状にそって打ち抜く第５の工
程、 からなることを特徴とする易開封性包装体の製造方法で
ある。
本発明に用いられる容器は、シール層と該シール層と
隣接層を少なくとも有し、該シール層と該隣接層とのラ
ミネート強度が300〜2000g/25mmである多層シートから
形成したフランジ部を有し、該シール層の厚みが10〜70
μの構成となっており、例えばシール層にポリエチレン
系樹脂、隣接層にポリプロピレン系樹脂からなる単なる
２層構成でもよく、またこの隣接層はエチレン−酢酸ビ
ニル共重合体けん化物または塩化ビニリデン系樹脂のバ
リア層、ポリプロピレン系樹脂、ポリエステル系樹脂等
の強化層、また中間層として金属、紙等を積層してなる
構成の多層シートで有っても差し支えない。
また蓋材は、容器のシール層と該シール層との隣接層
のラミネート強度より接着強度が大きいものなら、どの
ような構成でもよい。
超音波処理は、容器を受け台に供給し内容物充填前に
行う。内容物充填前であれば内容物による超音波発振ホ
ーンの汚れがなく、超音波発振ホーンの保守が比較的容
易である。超音波発振ホーンの処理面は、第５図に示す
ように容器のフランジ面に微小凹部を形成させるための
微小凸部が形成されており、これらの微小凸部のピッチ
間隔ｗは0.3〜0.8mmが好ましく、この微小凸部の突起の
高さｄは容器のシール層の厚さに対応して選択される
が、目安としてシール層の厚み１〜10倍程度が望まし
い。
この超音波処理は容器のフランジのシール層面全面あ
るいはその一部に行なう。
このようにフランジ全面もしくは一部分に微小凹部を
形成させるためには、超音波発振ホーンの受け台の形状
として第６図（ａ）、（ｂ）、（ｃ）に示すような構造
のものを用いることによってなされる。
〔作用〕
供給装置により、容器を受け台に供給した後多数の微
小凸状の目を有する超音波発振ホーンにより、該容器に
多数の微小凹部を形成する。その後容器内に品物を充填
した後、蓋材を容器に被せ、シール装置により容器と蓋
材とを接着シールする。
包装体の蓋材を容器から剥離するとき、該容器フラン
ジの外端部分のシール層と隣接層との間から剥離し始め
ると、多数の微小凹部を形成するところで容器のシール
層が切断され蓋材を容易に剥離できる。
以下、図面を参照して本発明の１実施例について詳細
に説明する。
第１図において、本発明の方法を概略的に示す。同図
において容器９は複数層（本実施例では２層）からなる
ものでその構成は、第３図に示すように、シール層10お
よび隣接層11とからなる。蓋材12も同じく複数層（本実
施例では２層）からなるものであり、その構成は第３図
に示すようにシール層13および隣接層14からなる。容器
９は、シール層10と隣接層11との接着力がシール層10と
蓋材12のシール層13とをヒートシールしたときの接着力
よりも小さくなるようなものをシールの種類に応じて予
め選ぶ。
第１図において１は容器供給装置であり、７の受け台
に容器９を供給する。
２は容器９の回りにおいて容器９のシール層10に多数
の微小凹部の剥離部15を形成する多数の微小凸状の目を
有する超音波発振ホーン、４は容器９内に品物を充填す
る充填装置、５は容器９と蓋材12とをヒートシールする
シール装置、６は、シールされた蓋材から包装体８を打
ち抜く打ち抜き装置である。
上記装置において容器９が供給装置により受台７に供
給された後、２の位置に送られると多数の微小凸状の目
を有する超音波発振ホーンが下降し、第２図のように容
器７のフランジ部に多数の微小凹部が形成する。
この時の超音波処理条件は出力2kW、圧力50〜700KP
a、発振時間0.05〜2.5sの範囲内で容器の種類、また形
状によって設定する。
次に容器９が充填装置４の下に送られるとその容器内
に品物が充填され、シール装置の直前で容器９の上に蓋
材12が被せられ、シール装置５により容器９と蓋材12と
がヒートシールされる。この時容器９のシール層10と蓋
材12のシール層13とは、第４図に示されるように多数の
微小凹部の上又は、外周においてフランジ全面をヒート
シールする。
その後打ち抜き装置６により包装体８が打ち抜かれ
る。
上記のように形成された包装体８の蓋材12を容器９か
ら剥離する場合蓋材12の外端を指でつまんで上方に引き
挙げれば、蓋材12は、第３図に示すように多数の微小凹
部の周縁外側にある容器９のシール層10が蓋材12にくっ
ついた状態で剥離される。
〔発明の効果〕
本発明の方法によりつくられた包装体は互いに引きは
がし可能な複数層のフィルムから成形される容器と蓋材
からなり、容器のシール層と隣接層の部分で剥離するの
で蓋材の開封が容易になりまた密封性にも優れている。
【図面の簡単な説明】
第１図は、本発明の包装体の製造方法を実施する装置の
概略図、 第２図は容器に連続した凹部を形成する動作を示す断面
図、 第３図は蓋の開封状態を示す断面図、第４図は包装体の
断面図、 第５図は、超音波発振ホーンの形状を示す断面図、第６
図は、受け台を示す概略図である。 1:容器供給装置、6:打ち抜き装置 2:超音波処理装置、7:受け台 3:超音波発振ホーン、8:包装体 4:充填装置、9:容器 5:シール装置、12:蓋材
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B65B 7/28 B65B 61/18 B65B 77/20

Claims (1)

    (57)【特許請求の範囲】
  1. 【請求項１】容器がシール層と該シール層との隣接層を
    少なくとも有し、該シール層と該隣接層とのラミネート
    強度が300〜2000g/25mmである多層シートから形成した
    フランジ部を有し、該シール層の厚みが10〜70μである
    容器であって、 該容器を容器受台に供給する工程、 多数の微小凸部を有する超音波発振ホーンを用いて該容
    器のフランジ部の蓋材とのシール面を超音波処理する工
    程、 内容物を充填する工程、 蓋材を該容器の超音波処理した面とをシール強度が該容
    器のシール層と隣接層とのラミネート強度より大きくな
    るようにヒートシールする工程、 蓋材を容器のフランジ形状にそって打ち抜く工程、 を有することを特徴とする易開封性包装体の製造方法。
JP2126947A 1990-05-18 1990-05-18 易開封性包装体の製造方法 Expired - Fee Related JP2874956B2 (ja)

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JP2874956B2 true JP2874956B2 (ja) 1999-03-24

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JP4526624B2 (ja) * 1999-11-26 2010-08-18 藤森工業株式会社 包装装置及び包装方法
JP2009185080A (ja) * 2009-05-27 2009-08-20 Clinigene Internatl Private Ltd 糖尿病性ネフロパシーにおけるミコフェノール酸モフェチル
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