JPH046025A - 液体容器の頂部のヒートシール方法 - Google Patents

液体容器の頂部のヒートシール方法

Info

Publication number
JPH046025A
JPH046025A JP2098855A JP9885590A JPH046025A JP H046025 A JPH046025 A JP H046025A JP 2098855 A JP2098855 A JP 2098855A JP 9885590 A JP9885590 A JP 9885590A JP H046025 A JPH046025 A JP H046025A
Authority
JP
Japan
Prior art keywords
pressing
heat
sponge
sealing
press rubber
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.)
Granted
Application number
JP2098855A
Other languages
English (en)
Other versions
JP2605921B2 (ja
Inventor
Hisahiro Manabe
寿裕 真鍋
Masahide Fujimoto
藤本　昌秀
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.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
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Filing date
Publication date
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Priority to JP9885590A priority Critical patent/JP2605921B2/ja
Publication of JPH046025A publication Critical patent/JPH046025A/ja
Application granted granted Critical
Publication of JP2605921B2 publication Critical patent/JP2605921B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B29C66/81812—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
    • 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
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/349—Cooling the welding zone on the welding spot
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43122—Closing the top of gable top 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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2821/00—Use of unspecified rubbers as mould material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Package Closures (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 【産業上の利用分野】
本発明は、ゲーベルトップ型液体容器等の頂部をヒート
シールする方法に関する。
【従来の技術】
牛乳、ジュース、お酒等を収納するゲーベルトップ型等
の液体容器は、廉価で且つ断熱効果を有する紙を基材と
し、表裏に積層したポリエチレン等のヒートシール性に
優れた樹脂フィルムをヒートシールすることにより製造
されている。 しかし、容器の強度アップと保形性を高める目的で基材
には厚手の紙が使用されているため、シール面の背部に
加熱板を押圧しても基材の紙が断熱性を有するためシー
ル面の樹脂フィルムをヒートシール可能な温度に加熱す
ることは容易でない。したがって、シール面に４００〜
６００℃程度の熱風を吹き付け、前記樹脂フィルムをヒ
ートシール可能な温度になるまで加熱し、背部より適宜
の押圧手段を用いて押圧することによりシールする方法
が取られている。
【発明が解決しようとする課題】
しかしながら、上記した従来のヒートシール方法におい
てはシール面の樹脂フィルムをヒートシール可能な温度
に加熱すると、その背部も相当に温度が上昇するため、
該背部を押圧する押圧手段もシールの繰り返しと共に過
熱状態になる。このため、背部側の樹脂フィルムが押圧
手段に融着して剥がれたり、該樹脂フィルムに印刷した
製造月日等のインキが取れると云う問題点があった。
【課題を解決するための手段】
本発明は上記した従来技術の課題を解決するためになさ
れたもので、少なくとも最内層および最外層が熱可塑性
樹脂からなる紙製の液体容器の頂部をヒートシールする
際、加熱したシール面の背部もしくは押圧手段の押圧面
に冷却水を供給しながら、シール面の背部を押圧してシ
ールすることを特徴とするヒートシール方法である。
【作用】
本発明はシール面の背部もしくは押圧手段の押圧面に冷
却水を供給しながらシール面の背部を押圧するので、前
記押圧面が過熱することがない。 このため前記背部の樹脂フィルムに剥がれる等の欠陥を
生じることがない。
【実施例】
つぎに本発明の一実施例を図面に基づいて詳細に説明す
る。 本発明によってヒートシールする被シール部材としては
、廉価で断熱性に優れた紙１１を基材（坪量３５０　ｇ
／ＴＩ？）とし、ヒートシール性に優れた厚さ２０ｕ＋
のポリエチレンフィルム１２とポリエチレンフィルム１
３とが表裏に積層された複合シート１等であり、ガスバ
リヤ−性と遮光性を高めるために適宜の厚さのアルミニ
ュウム箔を挟装したりすることも可能である。そして、
前記シート１を折り曲げる等して液体容器２を形成する
際の頂部２１が本発明によってシールされる。 符号３はプレスゴム３１と受は部３２とから構成された
押圧手段であり、中間点に向かって双方が移動し、液体
容器２の前記頂部２１を両側から押圧可能に設けられて
いる。符号４は冷却水４１を保水するスポンジ４２と、
該スポンジ４２に冷却水４１を供給する給水管４３、お
よびスポンジ押え４４とから構成される給水手段であり
、配置の詳細はスポンジ４２が、冷却水４１を押圧手段
３の前記プレスゴム３１の押圧面３１１に滴下可能にプ
レスゴム３１の押圧面３１１の直上に配置され、スポン
ジ押え４４が押圧手段３の受は部３２側から先端部４４
１をスポンジ４２に向け、プレスゴム３１の押圧面３１
１が頂部２１のシール面の背部１３Ｂに接する直前に、
先端部４４】がスポンジ４２に突き当たり、該スポンジ
４２に保水されていた冷却水４１をプレスゴム３１の押
圧面３１１に滴下可能に配設して用いられる。したがっ
て、プレスゴム３１の押圧面３１１は冷却水４１によっ
てヒートシールの度に冷却されるため、シールを繰り返
しても蓄熱されて過熱状態になることがないので、常時
良好な状態で次のヒートシールに対応することが出来る
。 液体容器２の前記頂部２工は複合シート１の内側に積層
されたポリエチレンフィルム１２の対峙するシール面１
２Ａと１２Ｂ１および外側に積層されたポリエチレンフ
ィルム１３の対峙するシール面１３Ａそれぞれをヒート
シールすることによって形成されるので、適宜の加熱手
段を用いて頂部２１を形成する複合シート１の上端部側
のポリエチレン１２と１３とを大略５５０℃の熱風によ
りヒートシール可能な１２０〜１３０°Ｃになるまで加
熱した後、従来周知の頂部形成手段を用いて対向する天
板２２同士を折り込みながら、他の対向する天板２３同
士を接近させて頂部２１の前記シール面１２Ａ、１２Ｂ
、および１３Ａを接触させ、該ソール面の背部１３Ｂと
１３Ｃとを押圧手段３のプレスゴム３１と受は部３２に
よって適宜の圧力によって押圧すると、前記シール面１
２Ａ１１２Ｂ、および１３Ａそれぞれがシールされた。 なお、製造月日等が印刷された背部１３Ｂをプレスゴム
３１側に配置してヒートシールしたので、該プレスゴム
３１が前記背部１３Ｂに接触する直前にスポンジ押え４
４の先端部４４１がスポンジ４２に突き当たり、該スポ
ンジ４２が保水していた冷却水４１がプレスゴム３１の
押圧面３１１に滴下し、該押圧面３１１とシール面の背
部１３Ｂのポリエチレンフィルム１３が急冷された。 このため、前記印刷が消えることもなかったし、ポリエ
チレンフィルム１３がプレスゴム３１の押圧面３１１に
融着することもなかった。 なお、給水管４３によるスポンジ４２への？ｌＩ水４１
の補給は、ヒートシール１回毎に補給しても良いし、ス
ポンジ４２の保水量を大きく形成しておけば１回の補給
で数回のヒートシールに対応させることも可能である。 また、第５図に示した様に水ｍ調整バルブ４５等を介し
て冷却水４１が供給可能に配管されたスポンジ製の冷却
ローラー４６を、加熱されたシール面の背部１３Ｂに回
転接触させることにより該背部１３Ｂを急冷し、その後
適宜の押圧手段によって該背部１３Ｂを押圧することに
よりシール面それぞれをシールすることも出来る。この
様に、シール面の背部１３Ｂの冷却を、押圧工程に先立
って独立して設けることも出来る。ただ、シール面の這
い部１３Ｂに直接水を供給して冷却すると、基材に厚手
の紙を用いた場合は良いが、薄手の紙を用いた場合は、
内側のシール面まで冷却されてしまい接着性が悪くなる
ことがあるので、薄手の紙を用いた場合には、押圧手段
に水を供給する方が好ましい。さらに、上記実施例にお
いてはシール面の一方の背部のみを急冷したのち押圧シ
ールしたが、両方の背部を急冷させて押圧するものであ
っても勿論構わない。
【発明の効果】
以上説明した様に、本発明は少なくとも最内層および最
外層が熱可塑性樹脂からなる紙製の液体容器の頂部をヒ
ートシールする際、加熱したシール面の背部もしくは押
圧手段の押圧面に冷却水を供給しながら、シール面の背
部を押圧してシールすることを特徴とするヒートシール
方法であるから、被シール部材のシール面をヒートシー
ル可能に加熱するとき、シール面の背部が加熱されてい
ても該背部を押圧手段が押圧する際には冷却されている
。このため背部の樹脂フィルムが剥がれたりすることが
ないし、製造月日等の印刷が施されていても、該印刷の
インキが剥がれて見え難くなることもない。したがって
、ヒートシール性に優れた樹脂フィルムと、断熱性の高
い紙等からなる複合シートを用いてゲーベルトップ型液
体容器を初めとする液体容器等を製造する際に、適用が
簡便であり、しかも欠陥が発生し難いヒートシール方法
であるので実用的な効果が大きい。
【図面の簡単な説明】
第１図は本発明の詳細な説明図、第２図は一実施例でシ
ールした容器の説明図、第３図は一実施例で用いた複合
シートの断面説明図、第４図は一実施例に用いた装置の
要部の説明図、第５図は他の背部冷却例を示す説明図で
ある。 １・・・複合シート、 １１・・・紙、１２．１３　・＝ポリエチレンフィルム
、２・・・液体容器、２１・・・頂部、 ３・・・押圧手段、３１・・・プレスゴム、３１１・・
・押圧面、３２・・・受は部、４・・・冷却手段、４１
・・・冷却水、４２・・・スポンジ、４３・・・給水管
、４４・・・スポンジ押え、４６・・・冷却ローラー第
１図 第２図

Claims (1)

    【特許請求の範囲】
  1. 少なくとも最内層および最外層が熱可塑性樹脂からなる
    紙製の液体容器の頂部をヒートシールする際、加熱した
    シール面の背部もしくは押圧手段の押圧面に冷却水を供
    給しながら、シール面の背部を押圧してシールすること
    を特徴とするヒートシール方法。
JP9885590A 1990-04-13 1990-04-13 液体容器の頂部のヒートシール方法 Expired - Lifetime JP2605921B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9885590A JP2605921B2 (ja) 1990-04-13 1990-04-13 液体容器の頂部のヒートシール方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9885590A JP2605921B2 (ja) 1990-04-13 1990-04-13 液体容器の頂部のヒートシール方法

Publications (2)

Publication Number Publication Date
JPH046025A true JPH046025A (ja) 1992-01-10
JP2605921B2 JP2605921B2 (ja) 1997-04-30

Family

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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007331780A (ja) * 2006-06-14 2007-12-27 Dainippon Printing Co Ltd 紙容器トップシール部冷却装置
WO2010136756A1 (en) * 2009-05-28 2010-12-02 Elopak Systems Ag A method
EP3409447A1 (en) * 2017-05-30 2018-12-05 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11820540B2 (en) 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58116502U (ja) * 1982-01-30 1983-08-09 凸版印刷株式会社 密封容器用頂部封着装置
JPH01232262A (ja) * 1988-03-11 1989-09-18 Teijin Ltd 試験管のシール装置及びシール方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58116502U (ja) * 1982-01-30 1983-08-09 凸版印刷株式会社 密封容器用頂部封着装置
JPH01232262A (ja) * 1988-03-11 1989-09-18 Teijin Ltd 試験管のシール装置及びシール方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007331780A (ja) * 2006-06-14 2007-12-27 Dainippon Printing Co Ltd 紙容器トップシール部冷却装置
WO2010136756A1 (en) * 2009-05-28 2010-12-02 Elopak Systems Ag A method
EP3409447A1 (en) * 2017-05-30 2018-12-05 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
WO2018219970A1 (en) * 2017-05-30 2018-12-06 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
US11554555B2 (en) 2017-05-30 2023-01-17 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11820540B2 (en) 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

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