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JP4776110B2 - Manufacturing method of zipper tape for bags - Google Patents
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JP4776110B2 - Manufacturing method of zipper tape for bags - Google Patents

Manufacturing method of zipper tape for bags Download PDF

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Publication number
JP4776110B2
JP4776110B2 JP2001216947A JP2001216947A JP4776110B2 JP 4776110 B2 JP4776110 B2 JP 4776110B2 JP 2001216947 A JP2001216947 A JP 2001216947A JP 2001216947 A JP2001216947 A JP 2001216947A JP 4776110 B2 JP4776110 B2 JP 4776110B2
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JP
Japan
Prior art keywords
heat
bag
film
tape
zipper tape
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JP2001216947A
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Japanese (ja)
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JP2003024113A (en
Inventor
広次 福森
信行 川合
弘造 天野
信彦 森川
和彦 中島
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富士特殊紙業株式会社
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Priority to JP2001216947A priority Critical patent/JP4776110B2/en
Priority to EP02254750A priority patent/EP1277668B1/en
Priority to AT02254750T priority patent/ATE315995T1/en
Priority to DE60208760T priority patent/DE60208760T2/en
Priority to DK02254750T priority patent/DK1277668T3/en
Priority to ES02254750T priority patent/ES2254612T3/en
Priority to US10/191,847 priority patent/US6808666B2/en
Publication of JP2003024113A publication Critical patent/JP2003024113A/en
Priority to US10/716,889 priority patent/US20040128805A1/en
Priority to US10/716,888 priority patent/US7077570B2/en
Priority to US10/716,887 priority patent/US20040130058A1/en
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Publication of JP4776110B2 publication Critical patent/JP4776110B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、包装用袋に接合して用いられるジッパーテープの製造法に関するものである。
【0002】
【従来の技術】
包装用袋がくり返し開閉できる利便性から、ジッパーテープ付き袋が従来から実用され、市場では今後増々普及するものと受け止められている。
従来のジッパーテープは、ポリエチレン系又はポリプロピレン系単体で、しかも咬合部となる雄条と雌条はテープ部に対して一対一列に一体成形されたのち、中央で雄条と雌条側に夫々カットされたものが多用されている。そして、このジッパーテープは、図1で示すように、包装用袋1に装着して用いられた場合、A−A線断面においては図2(イ)の如くなり、ここで雄条3aと雌条3bが一体成形されたテープ部4は、包袋用袋1の最内層5の樹脂がポリエチレン系袋の場合はポリエチレン系で、最内層5がポリプロピレン系の場合はポリプロピレン系の樹脂で成形されたものが用いられている。
【0003】
しかしながら、これには以下のような欠点がある。
まず、ジッパーテープ2の異形押出成形において、図2(イ)に見る如く、テープ部4に対して雄条3aと雌条3bが夫々一体成形ゆえに、各々の多列押し出しが困難で一対一列の押し出ししか行われておらず、生産性が低い。
次に、包装用袋1にジッパーテープ2を装着する場合において、図2(イ)に見る如く、袋1の最内層5とジッパーテープ2のテープ部4を袋1の外側から加圧加熱シールする際に、相対するテープ部4自体が熱融着する危険性があるため、テープ部4の厚みを厚くせざるを得ない。
【0004】
そのため、包装用袋1のサイドシール1a、1bを行う場合において、図2(ロ)に見る如く、袋1の外側から加圧加熱シールする際に、咬合部3、テープ部4が一体の溶融樹脂塊3´、4´となりここが脹れるため、加圧加熱シールを強くせざるを得ず、ひいてはその他のシール部にとって熱過剰となる。反対に加圧加熱シールを弱くすると溶融樹脂塊3´、4´が未溶融となりピンホールが発生しやすい。
ポリエチレン系の樹脂で形成された咬合部3とテープ部4から成るジッパーテープ2は包装用袋1の最内層5がポリエチレン系袋にしか熱融着しないのでポリプロピレン系袋には使えない。一方、ポリプロピレン系のジッパーテープ2の場合は、ポリエチレン系の袋1には使えないことから、袋1の最内層5の材質に合わせて使い分ける必要がある。
【0005】
かかる問題から、従来、改良型のジッパーテープも公表されている。最も代表的な技術として、図3(イ)に示すように、ジッパーテープ2のテープ部4にテープ部4よりも高融点の遮熱フィルム6を積層すると共に、更に遮熱フィルム6にこれより低融点の熱融着用フィルム7を積層したものがある(特許第1908600号)。即ち、図1の包装用袋1に装着して用いられるジッパーテープ2において、A−A断面を拡大図示すると図3(イ)となり、A´−A´断面を拡大図示すると図3(ロ)となる。
【0006】
この改良型のジッパーテープ2によると、前記従来技術の問題点のうち
ジッパーテープ2の異形押出成形において、雄条3aと雌条3bと夫々のテープ部4は一体成形であることから、一対一列の押し出しとならざるを得ず、生産性は改善されていない。
袋1の最内層5とジッパーテープ2の熱融着フィルム7を加圧加熱シールする際に、図3(イ)に見る如く、遮熱フィルム6の介在により、相対するテープ部4自体が熱融着する危険性は改善されることから、テープ部4、遮熱フィルム6、熱融着フィルム7を含めて100μ程度まで肉薄化できる利点がある。
【0007】
袋1のサイドシール1a、1bを行う場合において、図3(ロ)に見る如く、咬合部3とテープ部4一体の溶融樹脂塊3´、4´がテープ部4が肉薄化した分だけ小さくなるが、まだ不充分である。
ポリエチレン系のジッパーテープ2の場合は、熱融着フィルム7及び袋1の最内層5がポリエチレン系に限定され、ポリプロピレン系のジッパーテープ2の場合も同様にて、ポリプロピレン系に限定される点も改善されていない。
【0008】
【発明が解決しようとする課題】
本発明は斯る点に鑑みて提供されるものであって、その目的の第一は、ジッパーテープの製造に際し、広巾のベーステープ上に雄条と雌条を一対多列どりできる構造の袋用ジッパーテープの製法を提供することである。
【0009】
更にその目的の第2は、袋のサイドシールを行った時に発生するジッパーテープとの交点に発生する溶融樹脂塊を可及的に小さくしてピンホールの発生を防止し、併せて袋の外観を良くできる袋用ジッパーテープの製法を提供することである。
【0010】
更にその目的の第3は、袋の最内層がポリプロピレン系あるいはポリエチレン系の何れにも対応し、従来のように最内層と同一系のジッパーテープを選択しなければならないと云った不便さを解消する袋用ジッパーテープの製法を提供することである。
【0011】
【課題を解決するための手段】
上記目的を達成するため、請求項1に記載の発明においては、咬合部となる雄条と雌条をベーステープに形成した袋用ジッパーテープの製造法において、前記ベーステープは、袋の最内層にヒートシールされる熱融着フィルムと、この熱融着フィルムの表面に積層された前記熱融着フィルムより高融点の遮熱フィルムと、前記遮熱フィルムの表面に積層された咬合部形成用熱融着フィルムの少なくとも3層構造から成り、このベーステープは、あらかじめ積層したものを広巾の状態でロール状に巻きとり、次にこのロール状に巻きとられているベーステープを繰り出し、次にベーステープの咬合部形成用熱融着フィルムの表面に異形押出機から雄条と雌条を一対ごとに多列に押し出して熱融着させ、次にこの雄条と雌条が一対多列に形成されたベーステープを各条ごとにカットしたのち、このカットされたベーステープの雄条と雌条を一対ごと夫々咬合させて1本のジッパーテープを形成し、これを夫々巻きとり製品とする、ことを特徴とするものである。
0012
【発明の実施の形態】
本発明において、上記した改良型のジッパーテープ2と相違する第1の点は、図4(イ)に見る如く、ジッパーテープ2の雄条3aと雌条3bは、従来例のように、咬合部形成用融着フィルム8と一体成形したものではなく、この咬合部形成用熱融着フィルム8を含むベーステープはあらかじめ製造されていて、あとから雄条3aと雌条3bのみを異形押出機を用いて押し出し、これを咬合部形成用熱融着フィルム8の表面に夫々熱融着8aした点にある。
0013
その理由は、図1に示すように、ジッパーテープ2を袋1の口内に装着してサイドシール1a、1bを行う場合において、従来例に比して、図4(ロ)に見る如く、加圧加熱シールによって生じる溶融樹脂塊3´を咬合部3だけの塊とすることにより、最小化してピンホールの発生を防止し、併せて袋1の仕上りをより改善できることが判明したこと、さらには、ジッパーテープ2を異形押出成形する場合において、従来例では、テープ部4と一体の雄条3aと雌条3bが一対一列の押出成形しか行われていないのに比して、生産性の検討を種々行った結果、本発明の如く、咬合部3だけの異形押出であればその賦形性が容易で雄条3aと雌条3bが複数の対をなし多列で同時に押出成形できることが判明したことによる。
0014
そして、雄条3aと雌条3bそれぞれの咬合部3を多列で異形押出を行うと同時に、予め積層した上記の少なくとも3層からなる広巾フィルムに熱融着し、冷却後に雄条3aと雌条3bを長さ方向にスリットしながら、一対ずつ咬合してジッパーテープ2となし、巻取ることによって生産性が格段に向上することが可能となったことによる。
0015
次なる技術構成として重要なことは、図4(イ)に見る如く、ジッパーテープ2において、袋の最内層に融着するための熱融着フィルム7、遮熱フィルム6、咬合部形成用熱融着フィルム8の少なくとも3層構成のうち、熱融着フィルム7と咬合部形成用熱融着フィルム8の樹脂の選択に関することである。
0016
即ち、包装用袋の最内層には従来からポリエチレン系とポリプロピレン系があるのに対し、咬合部3も両種ある。ポリエチレン系の咬合部3について云えば、図2、3に見る如く、袋1のサイドシール1a、1b部に生じる溶融樹脂塊3´、4´の点からは、より軟質のポリエチレン系が好ましい。しかし、その場合はテープ部4も一体ゆえに同一樹脂製となり、袋1の最内層5がポリプロピレン系袋1の場合には熱融着しない。このことは図2(イ)において明白である。又、図3(イ)においては、熱融着フィルム7をポリプロピレン系にすれば、袋1の最内層5がポリプロピレン系袋の場合にも熱融着するように思われるが、図3(ハ)に見るが如く、袋1のサイドシール1a、1bを行う際に、相対するテープ部4がずれた時にポリエチレン系テープ部4がポリプロピレン系袋1の最内層5と直接に接することとなり、この直接に接した部分4aにおいてはやはり熱融着せず、ピンホールが発生するので、結局のところ、ポリプロピレン系袋1には使用できない。咬合部3がポリプロピレン系であっても同じ論理によりポリエチレン系袋1には使用できない。
0017
従って、本発明の第1の点を基本とする第2の点は、図4(イ)において、袋1の最内層5にあたる樹脂製フィルムがポリプロピレン系であるかポリエチレン系であるかに合わせて咬合部3とこの咬合部3を形成する雄条3aと雌条3bが熱融着するための咬合部形成用熱融着フィルム8と袋1の最内層5に融着するための熱融着フィルム7をポリプロピレン系又はポリエチレン系で統一することが必要である。
0018
そして同じ技術思想に基づいて、特殊用途の場合を追加しなければならない。それは薬剤包装のうち湿布薬のような浸透力の強い薬効成分をジッパー付袋に包装する場合は、薬効成分が浸透し減少しない包装材として袋1の最内層5には、エチレン/アクリル酸コポリマー(EAA)、エチレン/メタアクリル酸共重合体の金属イオン架橋樹脂(アイオノマー)、エチレン/メタアクリル酸共重合樹脂(EMAA)のいずれかからなるフィルムが専ら用いられる。
従って、ジッパーテープ2においても、袋1の最内層5に融着するための熱融着フィルム7と咬合部形成用熱融着フィルム8と咬合部3のうち少なくとも熱融着フィルム7は上記と同一種類の樹脂で統一することが必要である。
0019
ここで、遮熱フィルム6について述べておくと、この遮熱フィルム6は、製袋工程において、ジッパーテープ2を袋1の最内層5間に挟んで袋1の外側から加圧加熱シールを行う際に、図4(イ)に見る如く相対する咬合部形成用熱融着テープ8どうしを熱融着させないために、さらには袋1のサイドシール1a、1bを行う際に、図4(ロ)に見る如く、外側からの加圧加熱による溶融樹脂塊3´のつぶしを安定させるために必要で、2軸延伸ポリエステルフィルム、2軸延伸ナイロンフィルム等の耐熱延伸フィルムが遮熱フィルム6の素材としては適している。但し、遮熱の目的を達成するものであればこれらのフィルムに限定されるものではない。
0020
次に本発明の第3の点は、袋1の最内層5に融着するための熱融着フィルム7と咬合部3を融着するための咬合部形成用熱融着フィルム8の樹脂の選択に関し、更に新たな技術が判明した。
即ち、図4(イ)において、袋の最内層5がポリプロピレン系であるかポリエチレン系であるかに合わせて、これに融着するための熱融着フィルム7はポリプロピレン系又はポリエチレン系に統一する点は前記発明と変わらないが、咬合部3に融着するための咬合部形成用熱融着フィルム8としてポリプロピレン系樹脂とポリエチレン系樹脂及び第三成分としてポリブテン等のオレフィン系樹脂又はポリスチレン樹脂を混合した樹脂あるいは、エチレン酢酸ビニル共重合体樹脂とポリエチレン系樹脂及び第三成分としてオレフィン系改質剤を混合した樹脂からなるオレフィン系フィルムを用いることを特徴とするものである。
0021
その理由は、このオレフィン系フィルムがポリプロピレン系樹脂にもポリエチレン系樹脂にも熱融着する効果があるため、咬合部3は、袋1の最内層5がポリプロピレン系であるかポリエチレン系であるかに合わせて、ポリプロピレン系又はポリエチレン系に統一する必要がなく、袋1の仕上り面でより軟質ゆえに好ましいポリエチレン系を選択することが出来ること、さらには図5(イ)(ロ)に見る如く袋1のサイドシール1a、1bを行う際に、相対する咬合部形成用熱融着フィルム8がずれた時に、このオレフィン系咬合部形成用熱融着フィルム8が袋1の最内層5と接する部分8bにおいて、袋1の最内層5がポリプロピレン系であってもポリエチレン系であっても融着し、ピンホールを発生することなく、良好な熱融着が可能であることが大きい。
0022
次に、本発明の第4の点は、図4(イ)において、袋1の最内層5に融着するための熱融着フィルム7と咬合部形成用熱融着フィルム8の樹脂の更なる選択に関し、袋1の最内層5に融着するための熱融着フィルム7及び咬合部形成用熱融着フィルム8として、共にポリプロピレン系樹脂とポリエチレン系樹脂及び第三成分としてポリブテン等のオレフィン系樹脂又はポリスチレン樹脂を混合した樹脂あるいは、エチレン酢酸ビニル共重合体樹脂とポリエチレン系樹脂及び第三成分としてオレフィン系改質剤を混合した樹脂からなるオレフィン系フィルムを用いることを特徴とするものである。
その理由は、最早明白で、咬合部3のみならず、熱融着フィルム7、遮熱フィルム6、咬合部形成用熱融着フィルム8までもが、袋1の最内層5がポリプロピレン系であるかポリエチレン系であるかを問わず共用出来るからである。
0023
かくして、本発明のジッパーテープ2は、袋1の用途、種類に対して汎用化でき、更にジッパーテープ2の生産性に対しても、種類(タイプ)を統一して、しかも多列で生産できるので画期的である。
0024
【実施例1】
咬合部形成用熱融着フィルム8としてポリエチレンフィルム40μm/遮熱フィルム6として延伸ポリエステルフィルム12μm/袋1の最内層5に融着するための熱融着フィルム7としてポリエチレンフィルム40μmの積層構造からなる、120mm幅のベーステープを予め作成し、咬合部形成用熱融着フィルム8側に対して、ポリエチレン樹脂からなる雄条3aと雌条3bを、異形押出機を用いて一定間隔で5列押し出し、熱融着させ、冷却後に雄条3aと雌条3bごとにそれぞれ長さ方向に12mm幅にスリットしながら雄、雌一対ずつ咬合して巻き取り、5本のジッパーテープ2を同時に製造した結果、生産性が高く良品質のジッパーテープ2が得られた。
0025
【比較例1】
従来一般的なジッパーテープ2としてポリエチレン樹脂からなる雄条3aと雌条3bを夫々テープ部4と一体に異形押出成形を行った結果、複雑な賦形性ゆえに、雄条3aと雌条3bを一対一列に成形するのが限界で、一対多列に成形することは困難であった。
0026
【実施例2】
実施例1で得られたジッパーテープ2は、雄条3aと雌条3bのみを押出すことにより、成形安定性が良い為、新たな効果として、咬合部3部分の重量を最小限にする事が出来た。その重量はベーステープ部分の重量と合せて約5g/mに軽量化することが可能となった。
この効果として、本発明のジッパーテープ2を用いて、ポリエステルフィルム12μm/アルミ箔9μm/ポリエチレンフィルム60μmからなる製袋用フィルムに対して、袋1の流れ方向に平行に熱融着させ、かつ袋1のサイド部を加圧加熱シールした結果、ジッパーテープ2の部分の樹脂塊が少ないため、袋1は、そのサイド部の仕上りが良く、外観が非常に美麗に出来た。また、雄条3aと雌条3b側において多少のずれが発生しても、ピンホールの発生は認められなかった。
0027
【比較例2】
比較例1で得られたジッパーテープ2は、安定成形するには、咬合部3とテープ部4の樹脂を多量押出す必要がある為、ジッパーテープ2の重量は約8g/mとなる。
このジッパーテープ2を用いて、ポリエステルフィルム12μm/アルミ箔9μm/ポリエチレンフィルム60μmからなる製袋用フィルムに対して、袋1の流れ方向に平行に熱融着させ、かつ袋1のサイド部を加圧加熱シールした結果、ジッパーテープ2の樹脂塊が多いため、袋1は、そのサイド部の仕上りが悪く、外観が美麗に仕上らなかった。また、雄条3aと雌条3b側において多少のずれが発生した場合に、ここにピンホールの発生が認められた。
0028
【実施例3】
実施例1で製造したジッパーテープ2を用いて、ポリエステルフィルム12μm/アルミ箔9μm/ポリエチレンフィルム60μmからなる製袋用フィルムに対して、袋1の流れ方向に平行に熱融着させ、かつ袋1のサイド部を加圧加熱シールした結果、ジッパーテープ2の樹脂魂が少ないことによって、早く軟化してつぶれ、製袋フィルムへの負荷が小さい為、アルミ箔切れを起こすことなく100袋/分でも製袋作業ができた。
0029
【比較例3】
比較例1で製造したジッパーテープ2を用いて、ポリエステルフィルム12μm/アルミ箔9m/ポリエチレンフィルム60μmから成る製袋用フィルムに対して、袋1の流れ方向に平行に熱融着させ、かつ袋1のサイド部を加圧加熱シールした結果、ジッパーテープ2の樹脂魂が多いことによって、軟化が遅く、なかなかつぶれず、製袋フィルムへの負荷が大きい為、アルミ箔切れが60袋/分で発生した。
0030
【実施例4】
本実施例4のフローを図6に示し、咬合部形成部を図7に示し、雄条3aと雌条3bを咬合してジッパーテープ2を製造している状態を図8に示す。先ず、咬合部形成用熱融着フィルム8として、ポリプロピレン系樹脂にポリエチレン系樹脂及び第三成分としてポリブテン系樹脂等を混合した樹脂からなるオレフィン系フィルム(東セロ株式会社CMPSフィルム)50μm/遮熱フィルム6として延伸ポリエステル12μm/袋1に融着するための熱融着フィルム7としてポリプロピレンフィルム40μmの積層構造からなる、72mm幅の広巾フィルムのベーステープ100を予め作成し、このベーステープ100の咬合部形成用熱融着フィルム8側に対して、ポリエチレン樹脂からなる雄条3aと雌条3bを、異形押出機101を用いて交互に一定間隔で一対三列押し出し、熱融着させ、次に水槽102で冷却後に雄条3aと雌条3bを、それぞれ長さ方向に12mm幅にスリッター103でカットしたのち、雄条3aと雌条3bを一対ずつ咬合して巻き取り、3本のジッパーテープ2を同時に製造した。図中104は乾燥機である。
0031
本ジッパーテープ2を用いて、ポリエステルフィルム12μm/ポリプロピレンフィルム60μmからなる製袋用フィルムに対して、袋1の流れ方向に平行に熱融着させ、かつ袋1のサイド部を加圧加熱シールした結果、袋1の最内層がポリプロピレン系の場合に対してジッパー咬合部3がポリエチレン系であってもシール不良のない密封性に優れたジッパーテープ2付の袋1を作成することが出来た。
0032
【比較例4】
比較例1で製造したポリエチレン系ジッパーテープ2を製袋用フィルム(最内層がポリプロピレンフィルム)に対して熱融着させようとしたが、熱融着せず、熱融着を可能にする為には、ポリプロピレン樹脂からなるジッパーテープ2でしかジッパー付きの袋を製造することは出来なかった。
0033
【発明の効果】
本発明は以上のように、袋用ジッパーテープにおいて、ベーステープに雄条、雌条を一体成形で製造することなく、咬合部形成用熱融着フィルムの表面にあとから雄条と雌条を熱融着して形成するようにした。この結果、次の効果が得られる。
1.ジッパーテープにおいて、雄条と雌条の一対多列どりができるようになり、 この結果、従来の一対一列どりに比較して生産性が格段に向上する。
2.製袋時にジッパーテープが重なるサイドシール部分において、咬合部形成用 熱融着フィルムを含む咬合部の樹脂塊が小さくなることにより、袋の外観が良 くなる。
3.樹脂塊が小さくなることにより、ヒートシール時の熱過剰による問題が解消 し、併せて製袋速度のアップが可能となる。
4.咬合部形成用熱融着フィルムとしてポリプロピレン系及びポリエチレン系の フィルムと熱融着する特殊樹脂フィルムを用いることにより、例えばポリエチ レン製の咬合部から成るジッパーテープが最内層ポリプロピレン層から成る袋 にも使用できるようになる。
【図面の簡単な説明】
【図1】 従来のジッパーテープ付袋の説明図。
【図2】 (イ)はA−A線断面図、(ロ)はA´−A´線断面図。
【図3】 (イ)はテープ部が三層から成る従来例のジッパーテープを用いた袋の断面図、(ロ)はサイドヒートシール部の樹脂塊の説明図、(ハ)はテープ部がサイドシール部分においてずれ、ピンホールが発生している状態の説明図。
【図4】 (イ)は本発明に係るジッパーテープを用いた袋を図1においてA−Aで示す部分の断面図、(ロ)は図1において、A´−A´で示すサイドシール部分における樹脂塊の説明図。
【図5】 (イ)は本発明に係るジッパーテープを用いた袋を図1においてA−Aで示す部分の断面図、(ロ)は図1において、A´−A´で示すサイドシール部分においてテープ部がずれた状態の説明図。
【図6】 実施例4に係るジッパーテープの製造方法のフロー。
【図7】 異形押出機部分の説明図。
【図8】 スリッター部分の説明図。
【符号の説明】
1 袋
2 ジッパーテープ
3 咬合部
6 遮熱フィルム
7 熱融着フィルム
8 咬合部形成用熱融着フィルム
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a zipper tape used by being bonded to a packaging bag.
[0002]
[Prior art]
Due to the convenience of repeatedly opening and closing a packaging bag, a bag with a zipper tape has been practically used in the past, and is considered to be increasingly popular in the market.
The conventional zipper tape is a single unit of polyethylene or polypropylene, and the male strips and female strips that become the occlusal parts are integrally formed in one line with the tape unit, and then cut into the male strips and female strips at the center. What was done is used a lot. When this zipper tape is used by being attached to a packaging bag 1 as shown in FIG. 1, the cross section taken along the line A-A is as shown in FIG. The tape portion 4 integrally formed with the strip 3b is formed of a polyethylene resin when the resin of the innermost layer 5 of the bag 1 for sachet is a polyethylene bag, and is formed of a polypropylene resin when the innermost layer 5 is a polypropylene resin. Is used.
[0003]
However, this has the following disadvantages.
First, in the profile extrusion molding of the zipper tape 2, as shown in FIG. 2 (a), since the male strip 3a and the female strip 3b are integrally formed with the tape portion 4, respectively, it is difficult to push out each of the multiple rows, and one-to-one row. Extrusion is only performed and productivity is low.
Next, when the zipper tape 2 is attached to the packaging bag 1, the innermost layer 5 of the bag 1 and the tape part 4 of the zipper tape 2 are pressed and heated from the outside of the bag 1 as shown in FIG. When doing so, there is a risk that the opposing tape part 4 itself is heat-sealed, so the thickness of the tape part 4 must be increased.
[0004]
Therefore, when the side seals 1a and 1b of the packaging bag 1 are performed, the occlusal portion 3 and the tape portion 4 are integrally melted when performing pressure heating and sealing from the outside of the bag 1, as shown in FIG. Since the resin lumps 3 'and 4' become expanded here, the pressure and heat seal must be strengthened, and as a result, heat is excessive for the other seal portions. On the other hand, if the pressure and heat seal is weakened, the molten resin masses 3 'and 4' are not melted and pinholes are likely to occur.
The zipper tape 2 comprising the occlusal portion 3 and the tape portion 4 formed of a polyethylene resin cannot be used for the polypropylene bag because the innermost layer 5 of the packaging bag 1 is heat-sealed only to the polyethylene bag. On the other hand, the polypropylene-based zipper tape 2 cannot be used for the polyethylene-based bag 1 and therefore needs to be used according to the material of the innermost layer 5 of the bag 1.
[0005]
Because of this problem, an improved zipper tape has been publicly disclosed. As the most representative technique, as shown in FIG. 3 (a), a heat shielding film 6 having a melting point higher than that of the tape part 4 is laminated on the tape part 4 of the zipper tape 2, and further on the heat shielding film 6 from this. There exists what laminated | stacked the low melting | fusing film 7 for heat fusion (patent 1908600). That is, in the zipper tape 2 used by being attached to the packaging bag 1 of FIG. 1, when the AA cross section is enlarged and illustrated, it becomes FIG. 3 (a), and when the A′-A ′ cross section is enlarged and illustrated, FIG. It becomes.
[0006]
According to this improved type zipper tape 2, among the problems of the prior art, the male strip 3a, the female strip 3b and the respective tape portions 4 are integrally molded in the profile extrusion molding of the zipper tape 2, and therefore, As a result, productivity has not been improved.
When the innermost layer 5 of the bag 1 and the heat-sealing film 7 of the zipper tape 2 are pressure-heat-sealed, as shown in FIG. Since the risk of fusion is improved, there is an advantage that the thickness including the tape part 4, the heat shielding film 6, and the heat fusion film 7 can be reduced to about 100 μm.
[0007]
When the side seals 1a and 1b of the bag 1 are performed, as shown in FIG. 3 (b), the molten resin lumps 3 'and 4' integrated with the occlusal portion 3 and the tape portion 4 are made smaller by the thinning of the tape portion 4. However, it is still insufficient.
In the case of the polyethylene-based zipper tape 2, the heat-sealing film 7 and the innermost layer 5 of the bag 1 are limited to the polyethylene-based, and in the case of the polypropylene-based zipper tape 2, the point is also limited to the polypropylene-based. Not improved.
[0008]
[Problems to be solved by the invention]
The present invention is provided in view of such points, and the first of the objects thereof is for a bag having a structure in which a male strip and a female strip can be arranged in multiple rows on a wide base tape when a zipper tape is manufactured . It is to provide a method of making a zipper tape.
[0009]
Further, the second purpose is to prevent the occurrence of pinholes by minimizing the molten resin mass generated at the intersection with the zipper tape generated when the bag is side-sealed. It is providing the manufacturing method of the zipper tape for bags which can improve.
[0010]
Furthermore, the third purpose is to solve the inconvenience that the innermost layer of the bag is compatible with either polypropylene or polyethylene, and that the same type of zipper tape as the innermost layer must be selected as before. It is providing the manufacturing method of the zipper tape for bags .
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, in the method for manufacturing a zipper tape for a bag in which male strips and female strips as occlusal portions are formed on the base tape, the base tape is the innermost layer of the bag. A heat-sealing film to be heat-sealed, a heat-shielding film having a melting point higher than that of the heat-sealing film laminated on the surface of the heat-sealing film, and an occlusal portion formed on the surface of the heat-shielding film This base tape consists of at least a three-layer structure of heat-sealing film. This base tape is rolled up in a wide state in the state of being laminated in advance, and then the base tape wound in this roll shape is fed out, Male and female strips are extruded in multiple rows from a profile extruder on the surface of the base tape occlusal forming heat fusion film in pairs, and then the male and female strips are formed in multiple rows. Is After cutting the base tape for each strip, the male strip and female strip of the cut base tape are engaged with each other to form a single zipper tape, each of which is used as a wound product. It is a feature .
[ 0012 ]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the first difference from the above-described improved zipper tape 2 is that, as shown in FIG. 4 (a), the male strip 3a and the female strip 3b of the zipper tape 2 are occluded as in the conventional example. The base tape including the occlusal portion forming heat-sealing film 8 is manufactured in advance, and is not integrally molded with the portion-forming fusion film 8, and only the male strip 3a and the female strip 3b are later formed into a profile extruder. It is in the point which carried out the heat sealing | fusion 8a to the surface of the heat sealing | fusion film 8 for occlusal part formation, respectively.
[ 0013 ]
The reason for this is that, as shown in FIG. 4B, when the side seals 1a and 1b are carried out by attaching the zipper tape 2 to the mouth of the bag 1, as shown in FIG. It has been found that by making the molten resin mass 3 ′ generated by the pressure heating seal only the mass of the occlusal portion 3, the occurrence of pinholes can be minimized and the finishing of the bag 1 can be further improved. In the case of profile extrusion of the zipper tape 2, in the conventional example, as compared with the case where the male strip 3a and the female strip 3b integral with the tape portion 4 are only subjected to one-to-one row extrusion molding, the examination of productivity As a result of performing various processes, it was found that if the extrusion is only an occlusal portion 3 as in the present invention, the shapeability is easy, and the male strip 3a and the female strip 3b form a plurality of pairs and can be extruded simultaneously in multiple rows. It depends on.
[ 0014 ]
The occlusal portions 3 of the male strips 3a and female strips 3b are subjected to profile extrusion in multiple rows, and at the same time are heat-sealed to the above-mentioned wide film composed of at least three layers, and after cooling, the male strips 3a and female strips 3b are cooled. This is because the productivity can be remarkably improved by making the zipper tape 2 by biting one by one while slitting the strip 3b in the length direction and winding it.
[ 0015 ]
What is important as the next technical configuration is that, as shown in FIG. 4 (a), in the zipper tape 2, a heat-sealing film 7, a heat-shielding film 6, and heat for forming an occlusal portion for fusing to the innermost layer of the bag This is related to the selection of the resin of the heat-sealing film 7 and the occlusal portion forming heat-sealing film 8 among at least three layers of the heat-bonding film 8.
[ 0016 ]
That is, while the innermost layer of the packaging bag is conventionally made of polyethylene and polypropylene, there are both types of occlusal portions 3. Speaking of the polyethylene-based occlusal portion 3, as seen in FIGS. 2 and 3, a softer polyethylene-based one is preferable from the viewpoint of the molten resin masses 3 ′ and 4 ′ generated in the side seals 1 a and 1 b of the bag 1. However, in that case, since the tape portion 4 is also integrated, it is made of the same resin, and when the innermost layer 5 of the bag 1 is the polypropylene bag 1, it is not thermally fused. This is apparent in FIG. In FIG. 3 (a), if the heat-sealing film 7 is made of polypropylene, it seems that heat-sealing is performed even when the innermost layer 5 of the bag 1 is a polypropylene-based bag. ), When performing the side seals 1a and 1b of the bag 1, the polyethylene tape portion 4 comes into direct contact with the innermost layer 5 of the polypropylene bag 1 when the opposing tape portion 4 is displaced. In the part 4a that is in direct contact, heat fusion does not occur and pinholes are generated, so that it cannot be used for the polypropylene bag 1 after all. Even if the occlusal part 3 is made of polypropylene, it cannot be used for the polyethylene bag 1 by the same logic.
[ 0017 ]
Therefore, the second point based on the first point of the present invention is based on whether the resin film corresponding to the innermost layer 5 of the bag 1 is a polypropylene type or a polyethylene type in FIG. The occlusal portion 3, the male strip 3 a and the female strip 3 b forming the occlusal portion 3 are heat-sealed to the innermost layer 5 of the bag 1 and the heat-sealing film 8 for forming the occlusal portion and the bag 1. It is necessary to unify the film 7 with polypropylene or polyethylene.
[ 0018 ]
And based on the same technical idea, special cases must be added. In the case of packaging a medicinal component having a strong penetrating power such as a poultice in a package with a zipper, the inner layer 5 of the bag 1 has an ethylene / acrylic acid copolymer as a packaging material that does not penetrate and decrease the medicinal component. A film made of any one of (EAA), an ethylene / methacrylic acid copolymer metal ion crosslinked resin (ionomer), and an ethylene / methacrylic acid copolymer resin (EMAA) is exclusively used.
Accordingly, also in the zipper tape 2, at least the heat-sealing film 7 among the heat-sealing film 7, the occlusal portion forming heat-sealing film 8, and the occlusal portion 3 for fusing to the innermost layer 5 of the bag 1 is as described above. It is necessary to unify with the same type of resin.
[ 0019 ]
Here, the heat shield film 6 will be described. The heat shield film 6 performs pressure and heat sealing from the outside of the bag 1 with the zipper tape 2 sandwiched between the innermost layers 5 of the bag 1 in the bag making process. At the time, as shown in FIG. 4 (a), when the side seals 1a and 1b of the bag 1 are performed in order not to heat the heat sealing tapes 8 for forming the occlusal portions facing each other. As shown in FIG. 5, it is necessary to stabilize the crushing of the molten resin mass 3 ′ by pressure heating from the outside, and a heat-resistant stretched film such as a biaxially stretched polyester film or a biaxially stretched nylon film is a material for the heat shield film 6. It is suitable as. However, it is not limited to these films as long as the purpose of heat insulation is achieved.
[ 0020 ]
Next, the third point of the present invention is that the heat sealing film 7 for fusing to the innermost layer 5 of the bag 1 and the resin of the heat sealing film 8 for forming the biting part for fusing the biting part 3 are used. More new technologies have been found for selection.
That is, in FIG. 4 (a), the heat-sealing film 7 for fusing to the innermost layer 5 of the bag is made of polypropylene or polyethylene according to whether the innermost layer 5 of the bag is polypropylene or polyethylene. Although the point is not different from the above invention, a polypropylene resin and a polyethylene resin are used as the occlusal part forming heat fusion film 8 for fusing to the occlusal part 3, and an olefin resin such as polybutene or a polystyrene resin is used as the third component. An olefin film made of a mixed resin or a resin in which an ethylene vinyl acetate copolymer resin and a polyethylene resin and an olefin modifier is mixed as a third component is used.
[ 0021 ]
The reason is that this olefin film has the effect of heat-sealing both polypropylene resin and polyethylene resin, so the occlusal portion 3 is made of the innermost layer 5 of the bag 1 made of polypropylene or polyethylene. Therefore, it is not necessary to unify the polypropylene type or the polyethylene type, and it is possible to select a preferable polyethylene type because the finished surface of the bag 1 is softer. Furthermore, as shown in FIGS. The portion where the olefinic occlusal portion forming heat-sealing film 8 is in contact with the innermost layer 5 of the bag 1 when the opposing occlusal portion forming heat-sealing film 8 is displaced when the side seals 1a and 1b are performed. 8b, the innermost layer 5 of the bag 1 is fused regardless of whether it is polypropylene or polyethylene, and good heat fusion is possible without generating pinholes. Rukoto is large.
[ 0022 ]
Next, the fourth point of the present invention is that in FIG. 4 (a), the resin of the heat fusion film 7 for fusing to the innermost layer 5 of the bag 1 and the heat fusion film 8 for forming the occlusal portion is further changed. As a heat fusion film 7 for fusing to the innermost layer 5 of the bag 1 and a heat fusion film 8 for forming the occlusal portion, both polypropylene resin and polyethylene resin, and olefin such as polybutene as the third component It is characterized by using an olefin-based film made of a resin mixed with an ethylene-based resin or polystyrene resin, or an ethylene-vinyl acetate copolymer resin, a polyethylene-based resin, and a resin mixed with an olefin-based modifier as a third component. is there.
The reason for this is no longer obvious. The innermost layer 5 of the bag 1 is polypropylene-based not only for the occlusal portion 3 but also for the heat-sealing film 7, the heat shield film 6, and the heat-sealing film 8 for forming the occlusal portion. This is because it can be shared regardless of whether it is polyethylene or polyethylene.
[ 0023 ]
Thus, the zipper tape 2 of the present invention can be generalized with respect to the use and type of the bag 1, and the type (type) of the zipper tape 2 can be unified and produced in multiple rows. So it is groundbreaking.
[ 0024 ]
[Example 1]
It is composed of a laminated structure of a polyethylene film 40 μm as the occlusal portion forming heat-sealing film 8, a polyethylene film 40 μm as the heat-shielding film 6, a stretched polyester film 12 μm, and a heat-sealing film 7 for fusing to the innermost layer 5 of the bag 1 A 120 mm wide base tape is prepared in advance, and the male strip 3a and the female strip 3b made of polyethylene resin are extruded to the occlusal portion forming heat-sealing film 8 side at regular intervals by five rows using a profile extruder. As a result of heat sealing and cooling, the male strip 3a and the female strip 3b are each bitten by male and female pairs while being slit to a width of 12 mm in the longitudinal direction, and the five zipper tapes 2 are manufactured simultaneously. A high-quality zipper tape 2 with high productivity was obtained.
[ 0025 ]
[Comparative Example 1]
As a result of carrying out profile extrusion molding of the male strip 3a and female strip 3b made of polyethylene resin as the conventional general zipper tape 2 respectively with the tape portion 4, the male strip 3a and the female strip 3b are Forming in a one-to-one row was the limit, and forming in a one-to-many row was difficult.
[ 0026 ]
[Example 2]
Since the zipper tape 2 obtained in Example 1 has good molding stability by extruding only the male strip 3a and the female strip 3b, the weight of the occlusal portion 3 is minimized as a new effect. Was made. The weight can be reduced to about 5 g / m together with the weight of the base tape portion.
As an effect, the zipper tape 2 of the present invention is used to heat-seal the film for bag making made of polyester film 12 μm / aluminum foil 9 μm / polyethylene film 60 μm in parallel with the flow direction of the bag 1 and As a result of pressurizing and heat-sealing the side portion of 1, since the resin lump in the zipper tape 2 was small, the bag 1 had a good finish on the side portion and the appearance was very beautiful. In addition, no pinhole was observed even if a slight shift occurred on the male strip 3a and female strip 3b side.
[ 0027 ]
[Comparative Example 2]
In order to stably mold the zipper tape 2 obtained in Comparative Example 1, it is necessary to extrude a large amount of the resin of the occlusal portion 3 and the tape portion 4, so the weight of the zipper tape 2 is about 8 g / m.
Using this zipper tape 2, a bag-making film made of polyester film 12 μm / aluminum foil 9 μm / polyethylene film 60 μm is heat-sealed in parallel to the flow direction of the bag 1, and the side portion of the bag 1 is added. As a result of pressure and heat sealing, since the resin mass of the zipper tape 2 is large, the finish of the side portion of the bag 1 was poor and the appearance was not finished beautifully. Further, when a slight deviation occurred on the male strip 3a and female strip 3b side, the occurrence of pinholes was observed here.
[ 0028 ]
[Example 3]
Using the zipper tape 2 manufactured in Example 1, a bag-making film composed of a polyester film 12 μm / aluminum foil 9 μm / polyethylene film 60 μm was heat-sealed in parallel to the flow direction of the bag 1 and the bag 1 As a result of pressure and heat sealing the side part of the zipper tape 2, the resin soul of the zipper tape 2 is small, so it softens and crushes quickly, and the load on the bag-making film is small, so even at 100 bags / min without causing aluminum foil breakage I was able to make bags.
[ 0029 ]
[Comparative Example 3]
Using the zipper tape 2 manufactured in Comparative Example 1, a bag-making film comprising a polyester film 12 μm / aluminum foil 9 m / polyethylene film 60 μm was heat-sealed in parallel to the flow direction of the bag 1 and the bag 1 As a result of pressurizing and sealing the side part of the zipper tape 2, the softness of the zipper tape 2 is large, the softening is slow, it does not easily collapse, and the load on the bag-making film is large, so the aluminum foil breaks at 60 bags / min. did.
[ 0030 ]
[Example 4]
The flow of Example 4 is shown in FIG. 6, the occlusal part forming portion is shown in FIG. 7, and the state in which the male strip 3 a and the female strip 3 b are engaged to manufacture the zipper tape 2 is shown in FIG. 8. First, as the heat sealing film 8 for forming the occlusal portion, an olefin-based film (Tosero Co., Ltd. CMPS film) 50 μm / heat-shielding film made of a resin obtained by mixing a polyethylene-based resin with a polypropylene-based resin and a polybutene-based resin as a third component. 6, a base tape 100 of a wide film having a width of 72 mm made of a laminated structure of a polypropylene film 40 μm is prepared in advance as a heat-sealing film 7 for fusing to the stretched polyester 12 μm / bag 1, and the occlusal portion of the base tape 100 A male strip 3a and a female strip 3b made of polyethylene resin are alternately extruded at regular intervals to the forming heat-sealing film 8 side by a pair of three rows and thermally fused, and then a water tank. After cooling at 102, the male strip 3a and the female strip 3b are each slitted to a width of 12 mm in the length direction. 3 After cut, wound and bite the Ojo 3a and Mesujo 3b in pairs, to produce three zipper tape 2 at the same time. In the figure, 104 is a dryer.
[ 0031 ]
Using this zipper tape 2, a bag-making film composed of a polyester film 12 μm / polypropylene film 60 μm was heat-sealed in parallel to the flow direction of the bag 1, and the side portion of the bag 1 was sealed under pressure. As a result, even when the innermost layer of the bag 1 was polypropylene, the bag 1 with the zipper tape 2 having excellent sealing performance without sealing failure even when the zipper occlusion portion 3 was polyethylene could be produced.
[ 0032 ]
[Comparative Example 4]
The polyethylene zipper tape 2 manufactured in Comparative Example 1 was heat-sealed to a bag-making film (the innermost layer was a polypropylene film). A bag with a zipper could be produced only with the zipper tape 2 made of polypropylene resin.
[ 0033 ]
【The invention's effect】
As described above, according to the present invention, in the zipper tape for a bag , the male strip and the female strip are later formed on the surface of the heat-sealing film for forming the occlusal portion without manufacturing the male strip and the female strip integrally with the base tape. It was formed by heat fusion. As a result, the following effects can be obtained.
1. In the zipper tape, the male strip and the female strip can be made in a one-to-many manner. As a result, the productivity is remarkably improved as compared with the conventional one-to-one manner.
2. In the side seal portion where the zipper tape overlaps during bag making, the appearance of the bag is improved by reducing the resin mass of the occlusion portion including the heat sealing film for forming the occlusion portion.
3. By reducing the resin mass, the problem of excess heat during heat sealing is solved, and the bag making speed can be increased.
4). By using a special resin film that is heat-sealed with polypropylene and polyethylene films as the heat-sealing film for forming the occlusal part, for example, a zipper tape consisting of an occlusal part made of polyethylene is also applied to a bag made of the innermost polypropylene layer. Can be used.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a conventional bag with a zipper tape.
2A is a cross-sectional view taken along line AA, and FIG. 2B is a cross-sectional view taken along line A′-A ′.
3A is a cross-sectional view of a bag using a conventional zipper tape having a three-layer tape portion, FIG. 3B is an explanatory view of a resin mass in a side heat seal portion, and FIG. Explanatory drawing of the state which slip | deviated in the side seal part and the pinhole has generate | occur | produced.
4A is a cross-sectional view of a portion of the bag using the zipper tape according to the present invention indicated by AA in FIG. 1, and FIG. 4B is a side seal portion indicated by A′-A ′ in FIG. Explanatory drawing of the resin lump in FIG.
5A is a cross-sectional view of a portion of the bag using the zipper tape according to the present invention indicated by AA in FIG. 1, and FIG. 5B is a side seal portion indicated by A′-A ′ in FIG. Explanatory drawing of the state which the tape part shifted | deviated in FIG.
6 is a flowchart of a method for manufacturing a zipper tape according to Example 4. FIG.
FIG. 7 is an explanatory diagram of a profile extruder part.
FIG. 8 is an explanatory diagram of a slitter part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bag 2 Zipper tape 3 Occlusion part 6 Thermal insulation film 7 Thermal fusion film 8 Thermal fusion film for occlusion part formation

Claims (1)

咬合部となる雄条と雌条をベーステープに形成した袋用ジッパーテープの製造法において、前記ベーステープは、袋の最内層にヒートシールされる熱融着フィルムと、この熱融着フィルムの表面に積層された前記熱融着フィルムより高融点の遮熱フィルムと、前記遮熱フィルムの表面に積層された咬合部形成用熱融着フィルムの少なくとも3層構造から成り、このベーステープは、あらかじめ積層したものを広巾の状態でロール状に巻きとり、次にこのロール状に巻きとられているベーステープを繰り出し、次にベーステープの咬合部形成用熱融着フィルムの表面に異形押出機から雄条と雌条を一対ごとに多列に押し出して熱融着させ、次にこの雄条と雌条が一対多列に形成されたベーステープを各条ごとにカットしたのち、このカットされたベーステープの雄条と雌条を一対ごと夫々咬合させて1本のジッパーテープを形成し、これを夫々巻きとり製品とする、ことを特徴とする袋用ジッパーテープの製造法。In the method for manufacturing a zipper tape for a bag in which male strips and female strips to be occluded are formed on a base tape, the base tape includes a heat-sealing film that is heat-sealed to the innermost layer of the bag, and the heat-sealing film The base tape is composed of at least a three-layer structure of a heat-seal film having a higher melting point than the heat-seal film laminated on the surface and a heat-seal film for forming an occlusal part laminated on the surface of the heat-seal film. A pre-laminated roll is wound into a roll in a wide state, and then the base tape wound in this roll is fed out, and then the profile extruder is formed on the surface of the heat-sealing film for forming the occlusal portion of the base tape The male strips and female strips are extruded in multiple rows and heat-sealed in pairs, and then the base tape in which the male strips and female strips are paired in multiple rows is cut for each strip and then cut. The base tape Ojo and Mesujo by a pair each respectively occlusal form a single zipper tape, which is referred to as respectively winding and products, the preparation of bags for zipper tape, characterized in that.
JP2001216947A 2001-06-17 2001-07-17 Manufacturing method of zipper tape for bags Expired - Fee Related JP4776110B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP2001216947A JP4776110B2 (en) 2001-07-17 2001-07-17 Manufacturing method of zipper tape for bags
AT02254750T ATE315995T1 (en) 2001-07-17 2002-07-08 METHOD FOR PRODUCING AN INTERLOCKING PROFILE CLOSURE FOR A BAG
DE60208760T DE60208760T2 (en) 2001-07-17 2002-07-08 Method for producing an interlocking profiled strip closure for a bag
DK02254750T DK1277668T3 (en) 2001-07-17 2002-07-08 A method of making an interlocking strip into a bag
ES02254750T ES2254612T3 (en) 2001-07-17 2002-07-08 MANUFACTURING PROCEDURE OF A CLOSURE TAPE WITH PROFILE ELEMENT FOR A BAG.
EP02254750A EP1277668B1 (en) 2001-07-17 2002-07-08 Method for producing an interlocking fastener strip for a bag
US10/191,847 US6808666B2 (en) 2001-07-17 2002-07-09 Zipper tape for a bag and method of producing the same
US10/716,889 US20040128805A1 (en) 2001-07-17 2003-11-18 Zipper tape for a bag and method of producing the same
US10/716,888 US7077570B2 (en) 2001-07-17 2003-11-18 Zipper tape for a bag and method of producing the same
US10/716,887 US20040130058A1 (en) 2001-06-17 2003-11-18 Zipper tape for a bag and method of producing the same

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Application Number Priority Date Filing Date Title
JP2001216947A JP4776110B2 (en) 2001-07-17 2001-07-17 Manufacturing method of zipper tape for bags

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JP5142245B2 (en) * 2006-11-21 2013-02-13 富士特殊紙業株式会社 Zipper tape manufacturing equipment
JP2010284928A (en) * 2009-06-12 2010-12-24 Idemitsu Unitech Co Ltd Method for manufacturing packaging bag with zipper tape and apparatus for manufacturing the same
JP5711988B2 (en) * 2011-02-02 2015-05-07 株式会社クラレ Zipper tape and zippered packaging bag
JP2014104345A (en) * 2012-11-28 2014-06-09 Luangphiphong Chabbit Zipper tape, packaging bag with zipper and method of manufacturing the same

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JP2529599B2 (en) * 1989-03-16 1996-08-28 出光石油化学株式会社 Articulator and packaging bag with bite
JPH0637097B2 (en) * 1989-09-14 1994-05-18 日本特許管理株式会社 Method for manufacturing zipper tape and bag with this zipper tape
JPH06144451A (en) * 1992-11-09 1994-05-24 Idemitsu Petrochem Co Ltd Claw device and wrapping bag with its claw device
JP3725917B2 (en) * 1995-09-04 2005-12-14 出光興産株式会社 Occlusion device and packaging bag with occlusion device
JP2001139038A (en) * 1999-11-11 2001-05-22 Hosokawa Yoko Co Ltd Tear guide means, bags and their manufacturing methods
JP3676955B2 (en) * 1999-11-19 2005-07-27 株式会社生産日本社 Synthetic plastic bag with zipper

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