JPWO2013002148A1 - 密封包装体並びにその製造方法及び製造装置 - Google Patents
密封包装体並びにその製造方法及び製造装置 Download PDFInfo
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- JPWO2013002148A1 JPWO2013002148A1 JP2013522820A JP2013522820A JPWO2013002148A1 JP WO2013002148 A1 JPWO2013002148 A1 JP WO2013002148A1 JP 2013522820 A JP2013522820 A JP 2013522820A JP 2013522820 A JP2013522820 A JP 2013522820A JP WO2013002148 A1 JPWO2013002148 A1 JP WO2013002148A1
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- Prior art keywords
- seal
- film
- tubular film
- fusion
- fusing
- 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
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- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Package Closures (AREA)
- Packages (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Closing Of Containers (AREA)
Abstract
Description
図1に本発明に係る密封包装体の一実施形態を示す。図1(b)は(a)のIb−Ib断面図である。図1(a)に示す密封包装体1は、帯状の合成樹脂フィルムを曲げて当該フィルムの両側縁部を重ね合わせて筒状とし、重ね合わせ部3を当該フィルムの長手方向に融着して筒状フィルム2を構成する縦シール部(第1のシール部)4と、筒状フィルム2の両端部に形成された横シール部(第2のシール部)6と、筒状フィルム2の両端部にそれぞれ形成されており当該両端部を集束した状態で結紮する結紮部材8とを備える。
図2及び図3は、密封包装体1を製造するための装置を模式的に示す図である。これらの図に示す密封包装体製造装置10(以下、単に「装置10」という。)は、フィルム供給手段11、重ね合せ部形成手段31、充填手段21、縦シール形成手段(第1の融着手段)41、横シール形成手段(第2の融着手段)53及び結紮手段54を備える。
装置10を用いて密封包装体1を製造する方法について詳細に説明する。まず、フィルム供給手段11からローラ11a、11bを介して合成樹脂フィルム12を、重ね合せ部形成手段31に連続的に供給する。合成樹脂フィルム12の供給速度は、通常、10〜60m/min程度であり、使用する合成樹脂フィルム12の種類、厚さ、剛性、充填される内容物の素材や粘度等に応じて適宜設定される。
図2、3に示す装置10と同様の構成を有する装置を用いて、以下の方法により密封包装体を作製した。
アルミニウム線材による結紮の代わりにポリプロピレン線材によって結紮としたこと以外は実施例1と同様にして密封包装体を作製した。本実施例においては、密封包装体の両端部に配置する結紮部材として、直径2.5mm、長さ20mmで断面形状が円形(中実)のポリプロピレン製線材を用いた。この合成樹脂線材の融点は135℃、熱収縮率は10%であった。集束部を挟むように合成樹脂線材を配置した後、この合成樹脂線材の端部同士を超音波で融着した。
重ね合せ部を熱風シールによって形成する代わりに超音波シールによって形成したこと以外は実施例1と同様にして密封包装体を作製した。本実施例における超音波シールは、筒状体の内周面側に、重ね合せ部の内周面に当接するようにアンビルを設け、外周面側に、重ね合せ部の外周面に当接するように超音波ホーンを設けて行った。上記アンビルの当接面には、重ね合せ部の長手方向に沿って溝が設けられており、そのため、重ね合せ部には、長手方向に延伸する2本の平行なシール線が形成された。超音波の振幅は27μm、振動数は40kHz、超音波ホーンとアンビルとの押付け力を50N、出力を35Wとしてシールを行った。
実施例2と同様にプロピレン線材による結紮を行い、重ね合わせ部を実施例3と同様に超音波シールによって形成、横シール部の形状を四角中抜き2本線の形状(図8(a)参照)としたこと以外は実施例1と同様にして密封包装体を得た。
横シール部の形状を四角中抜き3本線の形状(図8(b)参照)としたこと以外は実施例4と同様にして密封包装体を作製した。
横シール部の形状を2本線の形状(図8(d)参照)としたこと以外は実施例4と同様にして密封包装体を作製した。
横シール部を設けなかった以外は実施例1と同じ条件で密封包装体を作製した。
合成樹脂フィルムとして厚さ40μmの塩化ビニリデン系樹脂を用い、かつ、両端部に横シール部及びアルミニウム線材からなる結紮部材を設ける代わりに、テープを用いた封止部を形成した以外は実施例1と同じ条件で密封包装体を作製した。
結紮部材での結紮を行わなかった以外は実施例1と同じ条件で密封包装体を作製した。
1000本の密封包装体を作製し、120℃、30分のレトルト処理を実施した。その後、レトルトパンク(破袋)が発生した本数を確認した。表1には、レトルトパンク(破袋)が発生していた本数を示す。
120℃、30分のレトルト処理を施した密封包装体について、導電テスターのプラス側を密封包装体の中央に差し込み、5%食塩水中に上記テスターのマイナス側と当該密封包装体の両端の封止部を浸し、導通の有無を測定した。表1に導通が認められた密封包装体の本数を示す。
120℃、30分のレトルト処理を施した密封包装体について、温度23℃、湿度60%RHの条件で保管し、シワ発生の有無を外観検査により評価した。表1にはシワが認められた時点での保管日数を示す。
上記実施例及び比較例について、密封包装体の生産速度を評価した。表1には1分間あたりの作製本数(ショット数)を示す。
Claims (26)
- 帯状の合成樹脂フィルムを曲げて当該フィルムの両側縁部を重ね合わせて筒状とし、この重ね合わせ部を当該フィルムの長手方向に融着して内容物を収容する筒状フィルムを構成する第1のシール部と、
前記筒状フィルムの両端部に形成されており前記筒状フィルムの幅方向の全長にわたって前記筒状フィルムの内面同士を融着してなる第2のシール部と、
前記筒状フィルムの両端部にそれぞれ形成されており当該両端部を集束した状態で結紮する結紮部材と、を備える密封包装体。 - 前記結紮部材の外側から前記筒状フィルムの端部にわたる耳部の全面積に対し、前記第2のシール部の面積比率が5%を超える、請求項1に記載の密封包装体。
- 前記第2のシール部の巾が0.1mm〜6.0mmである、請求項1又は2に記載の密封包装体。
- 前記第2のシール部が、筒状フィルムの幅方向の全長にわたって少なくとも1本の連続したシール線を有する、請求項1〜3のいずれか一項に記載の密封包装体。
- 前記シール線の巾が0.1mm〜2.0mmである、請求項4に記載の密封包装体。
- 前記第2のシール部が網目状に前記筒状フィルムの内面同士を融着してなる、請求項1〜5のいずれか一項に記載の密封包装体。
- 前記第2のシール部が、超音波シールによって形成されたものである、請求項1〜6のいずれか一項に記載の密封包装体。
- 前記結紮部材は合成樹脂線材からなり、当該線材の端部同士が融着して環状をなしている、請求項1〜7のいずれか一項に記載の密封包装体。
- 帯状の合成樹脂フィルムを曲げて当該フィルムの両側縁部が重なり合った筒状体を形成する重ね合せ部形成工程と、
前記筒状体の重ね合わせ部を当該フィルムの長手方向に融着して第1のシール部を形成し、筒状フィルム成形体を得る第1の融着工程と、
前記筒状フィルム成形体内に内容物を充填する充填工程と、
内容物が充填された前記筒状フィルム成形体に対して外側から力を加え、内容物が押しのけられた扁平部を、所定の間隔をあけて前記筒状フィルム成形体に連続的に形成する絞り工程と、
前記扁平部に熱を加え、前記筒状フィルム成形体の幅方向の全長にわたって当該筒状フィルム成形体の内面同士を融着させて第2のシール部を形成する第2の融着工程と、
前記第2のシール部又はその近傍において前記筒状フィルム成形体を集束して集束部を形成するとともに前記集束部を結紮する結紮工程と、
を備える密封包装体の製造方法。 - 前記第2の融着工程において、前記結紮部材の外側から前記筒状フィルムの端部にわたる耳部の全面積に対し、前記第2のシール部の面積比率が5%を超えるように前記第2のシール部を形成する、請求項9に記載の方法。
- 前記第2の融着工程において、前記第2のシール部の巾を0.1mm〜6.0mmに形成する、請求項9又は10に記載の方法。
- 前記第2の融着工程において、前記第2のシール部が、筒状フィルムの幅方向の全長にわたって少なくとも1本の連続したシール線を有するように形成する、請求項9〜11のいずれか一項に記載の方法。
- 前記第2の融着工程において、前記シール線の巾を0.1mm〜2.0mmに形成する、請求項12に記載の方法。
- 前記第2の融着工程において、前記第2のシール部を網目状に前記筒状フィルムの内面同士を融着して形成する、請求項9〜13のいずれか一項に記載の方法。
- 超音波シールによって前記第2のシールを形成する、請求項9〜14のいずれか一項に記載の方法。
- 前記第1の融着工程において、前記第1のシール部が、超音波シールにより連続的にシールされ、前記筒状フィルムの長手方向に延在する少なくとも1本の線状融着部からなるように、前記第1のシール部を形成する、請求項9〜15のいずれか一項に記載の方法。
- 前記結紮工程において、前記集束部の周りに合成樹脂線材を配置し、当該線材の端部同士を融着する、請求項9〜16のいずれか一項に記載の方法。
- 帯状の合成樹脂フィルムを曲げて当該フィルムの両側縁部が重なり合った筒状体を形成する重ね合せ部形成手段と、
前記筒状体の重ね合せ部を融着して第1のシール部を形成し、筒状フィルム成形体を得る第1の融着手段と、
前記筒状フィルム成形体内に内容物を充填する充填手段と、
内容物が充填された前記筒状フィルム成形体に対して外側から力を加え、内容物が押しのけられた扁平部を、所定の間隔をあけて前記筒状フィルム成形体に連続的に形成する絞り手段と、
前記扁平部に熱を加え、前記筒状フィルム成形体の幅方向の全長にわたって当該筒状フィルム成形体の内面同士を融着させて第2のシール部を形成する第2の融着手段と、
前記第2のシール部又はその近傍において前記筒状フィルム成形体を集束して集束部を形成するとともに前記集束部を結紮する結紮手段と、
を備える密封包装体製造装置。 - 前記第2の融着手段は、前記結紮部材の外側から前記筒状フィルムの端部にわたる耳部の全面積に対し、前記第2のシール部の面積比率が5%を超えるように、第2のシール部を形成する、請求項18に記載の装置。
- 前記第2の融着手段は、前記第2のシール部の巾を0.1mm〜6.0mmに形成する、請求項18又は19に記載の装置。
- 前記第2の融着手段は、前記第2のシール部が、筒状フィルムの幅方向の全長にわたって少なくとも1本の連続したシール線を有するように形成する、請求項18〜20のいずれか一項に記載の装置。
- 前記第2の融着手段は、前記シール線の巾を0.1mm〜2.0mmに形成する、請求項21に記載の装置。
- 前記第2の融着手段は、前記第2のシール部を網目状に前記筒状フィルムの内面同士を融着して形成する、請求項18〜22のいずれか一項に記載の装置。
- 前記第2の融着手段は、超音波シールによって前記扁平部に前記第2のシールを形成する手段を有する、請求項18〜23のいずれか一項に記載の装置。
- 前記第1の融着手段は、半円状の形状のアンビルと超音波ホーンによって第1のシール部を形成する手段であり、前記筒状フィルムの長手方向に延在する少なくとも1本の線状融着部を形成する、請求項18〜24のいずれか一項に記載の装置。
- 前記結紮手段は、前記集束部の周りに合成樹脂線材を配置し、当該線材の端部同士を融着する手段を有する、請求項18〜25のいずれか一項に記載の装置。
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