JPWO2003051729A1 - Sealing bag with opening tape - Google Patents

Sealing bag with opening tape Download PDF

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Publication number
JPWO2003051729A1
JPWO2003051729A1 JP2003552623A JP2003552623A JPWO2003051729A1 JP WO2003051729 A1 JPWO2003051729 A1 JP WO2003051729A1 JP 2003552623 A JP2003552623 A JP 2003552623A JP 2003552623 A JP2003552623 A JP 2003552623A JP WO2003051729 A1 JPWO2003051729 A1 JP WO2003051729A1
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Prior art keywords
opening tape
opening
tape
bag
sealing bag
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JP2003552623A
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Japanese (ja)
Inventor
修一 後藤
修一 後藤
大木　祐一
祐一 大木
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Idemitsu Unitech Co Ltd
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Idemitsu Unitech Co Ltd
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Publication of JPWO2003051729A1 publication Critical patent/JPWO2003051729A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/812—Applying patches, strips or strings on sheets or webs
    • B31B70/8123—Applying strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/66—Inserted or applied tearing-strings or like flexible elements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Packages (AREA)

Abstract

A zipper 3 is stuck on the opening part 2 side of a packaging bag 1 and a heat-sealed part 12 is formed in the outer side from the zipper 3 to seal the packaging bag 1. A band-shaped unsealing tape 3 is stuck, in parallel to the opening part 2, on one inner surface of the packaging bag 1 in an area between the zipper 3 and the heat-sealed part 12. A cutout part 4 is formed on a surface opposite to the surface with the unsealing tape 3 stuck thereon at the end part of the unsealing tape 3. A pair of cut-in parts 5 are formed on the packaging bag 1 at the end part of the unsealing tape 3. <IMAGE>

Description

技術分野
本発明は、開封テープ付密封袋に関する。詳しくは、食品、医薬品等を包装する包装袋の開口部側に設けられる開封テープ付密封袋に関する。
背景技術
従来、袋の開封部に雄型咬合具と雌型咬合具より成る咬合具（嵌合具）を設けることにより、開閉自在とした袋（チャック袋）が食品、医薬品、雑貨等の多くの分野で使用されている。このような咬合具付袋でも、販売時点までは完全密閉されていることが望ましく、咬合部分に沿って端部を完全に密封することが一般的である。密封シールされる咬合具付袋では、使用時に咬合具と開口側シール部分との間を切断し、その後は咬合具部分で開封、再密封することが一般的である。
密封シールされる袋の開封には、利用者が従来の鋏を使って切断する方法の他、切断すべき部分の側端から手で引き裂く方法が採られる。手で引き裂く操作を容易にするために、袋の側端にノッチを形成することもなされている。
しかし、鋏の使用は面倒であり、且つ鋏がないと切れないという欠点がある。また、ノッチから引き裂く切断の仕方によれば直線状にきれいに切れないという欠点がある。そこで、近年では、鋏等の道具を使うことなく手で直線状に引き裂くための手段として、例えば次のような手段が提案されている。
手段１；引き裂き線として開口部側にミシン目を形成する。
手段２；袋体を構成するラミネートフィルムの内面側フィルムを肉厚に形成すると共に、この内面側フィルムに咬合具を形成し、且つこの内面側フィルムの咬合具よりも端縁側に切り込み線を形成する（実公昭５２−１８２５４号公報参照）。
手段３；特殊な形状の切断線を形成する（実開昭６２−１３８３８号公報参照）。
しかしながら、前述した各手段には次のような問題がある。
手段１では、ミシン目のため密封性が低く、輸送時等において何らかの原因で開封してしまうという問題がある。
手段２では、切り込み線の形成された内面側フィルム単体のままではきれいに裂けても、これを基材フィルムに熱溶着した場合、熱の影響で切り込み線が埋まって引き裂きにくくなるという問題がある。
手段３では、密封性が不充分であり、且つ特殊な切断線を形成するための工程が複雑になるという問題がある。
発明の開示
本発明の主な目的は、使用前の密封性が確実であり、且つ、手による切断開封を容易に行うことができる開封テープ付密封袋を提供することにある。
本発明は、包装袋の開口部側に開封テープが設けられる開封テープ付密封袋であって、前記包装袋の内側の一方の面に、前記開口部に平行に貼着される帯状の開封テープを備え、前記包装袋の前記開封テープの端部側には、前記開封テープの貼着面の反対側の面に切欠部が形成されていることを特徴とする。
ここで、開封テープの貼着は、接着剤を用いた接着やヒートシール等による熱溶着により行われる。本発明のテープとしては幅広いものに限らず、幅の狭いものであってもよく、引き裂きガイド効果が得られれば紐状のものであってもよい。テープとしては、ある程度幅が狭いほうが引き裂きガイド効果が高くなる。但し、幅が広ければ、薄くても引っ張り強度が得られる。幅を狭くする場合、厚みを増す等すれば強度が確保でき、断面が楕円形ないし円形のいわゆる紐状にしてもよい。
このような本発明によれば、包装袋の内側の一方の面に、前記開口部に平行に貼着される帯状の開封テープを備えて構成されることにより、ミシン目等を設ける構造でないため、外部との隙間が生じないので、包装袋の開封前の密封性を確実にすることができる。
また、包装袋の前記開封テープの端部側には、開封テープの貼着面の反対側の面に切欠部が形成されていることにより、切欠部がある部分は、開封テープと包装袋の一方の面だけになるから、切込部で開封テープ端部が露出するので、容易に、切込部を起こすことができる。
本発明の開封テープ付密封袋では、前記包装袋および／または前記開封テープには、前記開封テープの端部から切り込まれて終端部が前記開封テープの内側に位置する一対の切込部が形成されていることが望ましい。
このような本発明によれば、前記包装袋および／または前記開封テープの前記開封テープ端部側に一対の切込部が形成されていることにより、この切込部に挟まれた部分がタブ状となり、包装袋の開封時にこのタブ状の部分をそのままつまみ部分として把持することができるので、手による切断開封を容易に行うことができる。
本発明の開封テープ付密封袋では、前記切込部は、前記開封テープに対して傾斜配置され、各々の切込みの基端部側が前記開封テープの外側に配置されていることが望ましい。
このような本発明によれば、切込部が傾斜していることにより、開封テープの貼着の位置が多少ずれていても、包装袋の一方の面と開封テープに確実に切込部を形成することができる。特に、一対の切込部は袋の奥側（切断が進む方向）に向かうにしたがって、互いに近接する状態となり、切断線を所定の位置（開封テープの中心線など）に誘導することができ、手による切断であっても所定の切断状態を確実に確保することができる。
本発明の開封テープ付密封袋では、前記開封テープは、長尺方向に一軸延伸加工されていることが好ましい。
ここで、延伸とは、繊維状あるいはフィルム状の高分子材料を物理的に引き伸ばすことをいう。これにより、高分子材料の強度や弾性率の向上をはかることができ、結晶性高分子をガラス転移温度以上、融点以下の温度で延伸すると、非晶部分の分子が延伸方向に引き伸ばされ、結晶化度が増すとともに、分子が延伸方向に配向する。その結果、延伸方向の引張強度や引張弾性率が大きくなる。一軸延伸とは、ある一定方向に引き伸ばすことをいい、例えば、フィルムを一軸延伸すると、延伸方向の強度が垂直方向に比べて増加し，異方性材料となり、さらに、引き裂いた場合には、延伸方向に引き裂かれる指向性が強くなる。
これにより、延伸倍率は、５倍以上、好ましくは８〜１２倍がよい。開封テープは、長尺方向に一軸延伸加工されていることにより、引き裂きの指向性が強くなるので、開封テープの長尺方向に沿って直線的に開封することができる。
本発明の開封テープ付密封袋では、前記開封テープは、ポリオレフィン系樹脂製であることが好ましく、そのなかでも、ポリオレフィン系樹脂は、ポリエチレン系樹脂またはポリプロピレン系樹脂が好ましい。
ここで、ポリオレフィン系樹脂としては、ポリエチレン、ポリプロピレン、ポリブテン等がある。
ポリエチレン系樹脂としては、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、高密度ポリエチレン（ＨＤＰＥ）、低密度ポリエチレン（ＬＤＰＥ）等が挙げられる。
ポリプロピレン系樹脂としては、ポリプロピレンとしては、ホモポリプロピレン、ランダムポリプロピレン、ブロックポリプロピレン等が挙げられる。
これによれば、開封テープは、ポリオレフィン系樹脂製であることにより、ポリオレフィン系樹脂は熱可塑性を備えるので、成形、延伸等の加工が容易である。
また、ポリエチレン系樹脂は、防湿性，耐水性，耐寒性，耐薬品性に優れ柔軟であり、液状の被包装体を包装する際に好適である。
さらに、ポリプロピレン系樹脂は、比重が小さくので、包装袋自体の重さを軽くすることができる。
本発明の開封テープ付密封袋では、雌雄一対の部材の部材からなる咬合具が、袋内面側にそれぞれ貼着されていることが好ましい。
これによれば、雌雄一対の部材の部材からなる咬合具が、袋内面側にそれぞれ貼着されていることにより、咬合具は、再開閉可能であるので、袋の密封性を保持することができる。
発明を実施するための最良の形態
以下、本発明の実施の形態を図面に基づいて説明する。
図１には、本発明の一実施形態に係る包装袋１が示されている。
包装袋１は、矩形状のポリエチレンシート１０Ａ（図示表側）、１０Ｂ（図示裏側）の４辺をヒートシール等で封止されて構成されている。これら封止された部分は、ヒートシール部１２となる。また、矩形状の包装袋１の１辺が、開口部２とされている。
開封テープ３は、ポリオレフィン系樹脂製の幅のあるテープであり、開口部２側に、ポリエチレンシート１０Ｂの面に、ヒートシール等で溶着されることにより、貼着され、長尺方向に一軸延伸加工されている。
切欠部４は、包装袋１の開封テープ３の端部側で、開口部２側に、ポリエチレンシート１０Ａの面に矩形状に、形成されている。
切込部５は、開封テープ３の端部側に、ポリエチレンシート１０Ｂから開封テープ３の端縁に対して傾斜し、開封テープ３の内側まで達するように形成されている。また、切込部５は、切欠部４の範囲内に形成されている。なお、切欠部４および切込部５は、本実施形態では、開口部２に直交する２辺のヒートシール部１２の両方に設けられている。
咬合具１１は、開口部２側の開封テープ３の下側に、ポリエチレンシート１０Ａ、１０Ｂの両面に、それぞれ、雌雄一対の部材が、ヒートシール等で貼着されている。また、咬合具１１は、包装袋１の内面に貼着されている。ここで、咬合具１１は、ポリエチレン製である。
切欠部４は、図２に示すように、開口部２側に、ポリエチレンシート１０Ａの面に矩形状に、形成され、切込部５は、開封テープ３端部側に位置し、開封テープ３よりも外側に位置し、かつ、ポリエチレンシート１０Ｂ上に位置する切込基端部５Ａから傾斜して、開封テープ３の内側に位置する切込終端部５Ｂまで達するように形成されている。
切込終端部５Ｂは、図２のＸ−Ｘ断面図である図３に示すように、開封テープ３の内側に形成されている。
包装袋１の開封の手順としては、図４に示すように、開封テープ３の端部側をつまみ上げ、矢印の方向に、引っ張るようにして、引き裂く。ポリエチレンシート１０Ｂ、開封テープ３、ポリエチレンシート１０Ａが重なった部分は、切込終端部５Ｂから平行な方向に、直線的に、引き裂かれる。
包装袋１の製造の手順としては、図５に示すように、あらかじめ、ポリエチレンシート１０Ａ、１０Ｂの間に開封テープ３を挟み込む。この際、ポリエチレンシート１０Ａの開封テープ３の対応する位置には、切欠部４が形成されている。ポリエチレンシート１０Ａ、１０Ｂ、開封テープ３は、ヒートシールバー２０によって、加熱溶着され、ヒートシール部１２が、切欠部４の対応する位置に形成される。
その後、切欠部４内に、２組の切込部５が開封テープ３をまたがるように、ハの字型に形成されている。この際、切込部５は、ハの字型の末広がり同士が、対向するように形成されている。
さらに、カットバー３０によって、ポリエチレンシート１０Ｂ、開封テープ３、ポリエチレンシート１０Ａが重なった部分は、２組の切込部５の間を切断される。
以上の工程を経て、２組の切欠部４、切込部５が形成されているポリエチレンシート１０Ｂ、開封テープ３、ポリエチレンシート１０Ａの積層体に、図示しているヒートシール部１２の直交する２辺に、ヒートシール部を形成すれば、包装袋となる。
上述のような本実施形態によれば、次のような効果がある。
（１）開封テープ３の端部側には、開封テープ３の端縁に対して傾斜した開封テープ３の内側に達する切込部５が形成されていることにより、包装袋１の開封時に切込部５をそのままつまみ部分として把持することができるので、手による切断開封を容易に行うことができる。
また、切込部５が傾斜していることにより、開封テープ３の貼着の位置が多少ずれていても、包装袋１のポリエチレンシート１０Ｂの面と開封テープ３に確実に切込部５を形成することができる。
さらに、包装袋１の内側の一方の面に、開口部２に平行に貼着される帯状の開封テープ３を備えて構成されることにより、ミシン目等を設ける構造でないため、外部との隙間が生じないので、包装袋１の開封前の密封性を確実にすることができる。
（２）包装袋１の開封テープ３の端部側には、開封テープ３の貼着面の反対側の面に切欠部４が形成されていることにより、切欠部４がある部分は、開封テープ３と包装袋１のポリエチレンシート１０Ａの面だけになるから、切欠部４は薄くなるので、容易に、切込部５を起こすことができる。
（３）開封テープ３は、長尺方向に一軸延伸加工されていることにより、引き裂きの指向性が強くなるので、開封テープ３の長尺方向に沿って直線的に開封することができる。
なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良は、本発明に含まれるものである。例えば、切込部５としては、開封テープ３の外側に位置する切込基端部５Ａから傾斜して、開封テープ３の内側に位置する切込終端部５Ｂを形成していたが、これに限られず、切込部５は、切込基端部５Ａが、開封テープ３の内側に位置していてもよい。
この場合、切込部５は傾斜していなくてもよく、例えば図６に示すように、一対が互いに平行であってもよい。
また、切欠部４および切込部５は、開封テープ３の両端にそれぞれ形成されていたが、何れか片方（つまり図１の袋の左右何れかの側だけ）でもよい。
一対の切込部５は形成されないとしてもよく、切欠部４により一方のポリエチレンシート１０Ｂおよび開封テープ３だけが掴める状態になるので、この部分を把持性して容易に切り裂きを開始することができる。
開封テープ３は前記実施形態のような幅のあるものに限らず、幅の狭いものであってもよく、引き裂きガイド効果が得られる引っ張り強度がえられれば細い紐状のものであってもよい。
さらに、咬合具１１は、前記実施形態では、開口部２側に貼着されて設けられていたが、設けなくともよい。この場合、使い捨ての包装袋として好適である。 また、開封テープ３は、前記実施形態では、ポリエチレン製であったが、これに限られず、ポリプロピレン製であってもよい。
その他、本発明を実施する際の具体的な構造および形状等は、本発明の目的を達成できる範囲内で他の構造等としてもよい。
産業上の利用可能性
本発明は、食品、医薬品等を包装する包装袋として利用でき、特に開口部側に開封を容易にした開封テープ付密封袋として利用できる。
【図面の簡単な説明】
図１は本発明の一実施形態を示す包装袋の平面図である。
図２は前記実施形態における包装袋の拡大平面図である。
図３は前記図２の包装袋のＸ−Ｘ断面図である。
図４は前記実施形態における包装袋の開封手順を示す図である。
図５は前記実施形態における包装袋の製造手順を示す図である。
図６は本発明の他の実施形態を示す包装袋の平面図である。TECHNICAL FIELD The present invention relates to a sealing bag with an opening tape. More specifically, the present invention relates to a sealing bag with an opening tape provided on the opening side of a packaging bag for packaging foods, medicines and the like.
BACKGROUND ART Conventionally, a bag (chuck bag) that can be opened and closed by providing a bite (fitting tool) made up of a male bite and a female bite at the opening part of the bag has been widely used for food, medicine, miscellaneous goods, etc. Used in the field. Even in such a bag with a bite, it is desirable that the bag is completely sealed until the point of sale, and it is common to completely seal the end along the bite part. In a bag with an occlusion device that is hermetically sealed, it is common to cut between the occlusion device and the opening-side seal portion during use, and then open and reseal the occlusion device portion.
In order to open a bag to be hermetically sealed, a method in which a user cuts by using a conventional scissors or a method in which a user tears manually from a side end of a portion to be cut is employed. In order to facilitate the manual tearing operation, notches are also formed on the side edges of the bag.
However, the use of scissors is troublesome and has the disadvantage that it cannot be cut without the scissors. In addition, there is a drawback in that it cannot be cut in a straight line according to the cutting method torn from the notch. Thus, in recent years, for example, the following means have been proposed as means for tearing in a straight line by hand without using a tool such as a scissors.
Means 1; A perforation is formed on the opening side as a tear line.
Means 2: The inner side film of the laminate film constituting the bag is formed thick, the occlusion tool is formed on the inner side film, and the cut line is formed on the edge side of the inner side film. (Refer to Japanese Utility Model Publication No. 52-18254).
Means 3: A cutting line having a special shape is formed (see Japanese Utility Model Publication No. 62-13838).
However, each means described above has the following problems.
The means 1 has a problem that the sealing performance is low due to the perforation, and it is unsealed for some reason during transportation.
The means 2 has a problem that, even if the inner film on which the score line is formed is torn cleanly, when the film is thermally welded to the base film, the score line is buried under the influence of heat and is difficult to tear.
The means 3 has a problem that the sealing performance is insufficient and the process for forming a special cutting line is complicated.
DISCLOSURE OF THE INVENTION The main object of the present invention is to provide a sealing bag with an opening tape that can be reliably sealed before use and can be easily cut and opened by hand.
The present invention is a sealing bag with an opening tape in which an opening tape is provided on the opening side of the packaging bag, and is a belt-shaped opening tape attached to one side of the inside of the packaging bag in parallel with the opening. And a notch is formed on the surface of the packaging bag on the side opposite to the sticking surface of the opening tape.
Here, the unsealing of the opening tape is performed by adhesion using an adhesive or heat welding by heat sealing or the like. The tape of the present invention is not limited to a wide tape and may be narrow, or may be a string as long as a tear guide effect can be obtained. As a tape, the tear guide effect is higher when the width is narrow to some extent. However, if the width is wide, the tensile strength can be obtained even if it is thin. When the width is narrowed, the strength can be secured by increasing the thickness or the like, and the cross section may be a so-called string shape having an elliptical shape or a circular shape.
According to the present invention as described above, since it is not provided with a perforation or the like by being provided with a band-shaped opening tape attached in parallel to the opening on one surface inside the packaging bag, Since there is no gap with the outside, the sealing performance before opening the packaging bag can be ensured.
In addition, the end portion of the opening tape of the packaging bag is formed with a notch on the surface opposite to the surface of the opening tape, so that the portion with the notch is located between the opening tape and the packaging bag. Since only one surface is present, the end portion of the opening tape is exposed at the cut portion, so that the cut portion can be easily raised.
In the sealing bag with an opening tape of the present invention, the packaging bag and / or the opening tape has a pair of cut portions that are cut from an end portion of the opening tape and whose terminal portions are located inside the opening tape. It is desirable that it be formed.
According to the present invention, a pair of cut portions are formed on the opening tape end portion side of the packaging bag and / or the opening tape, so that the portion sandwiched between the cut portions is a tab. Since the tab-shaped portion can be gripped as it is as a grip portion when the packaging bag is opened, it can be easily cut and opened by hand.
In the sealing bag with an opening tape of the present invention, it is desirable that the cut portion is disposed to be inclined with respect to the opening tape, and a base end portion side of each cut is disposed outside the opening tape.
According to the present invention, the cut portion is inclined so that the cut portion can be securely attached to one surface of the packaging bag and the open tape even when the position of the open tape is slightly shifted. Can be formed. In particular, the pair of cut portions become closer to each other toward the back side of the bag (the direction in which cutting proceeds), and the cutting line can be guided to a predetermined position (such as the center line of the opening tape) Even when cutting by hand, a predetermined cutting state can be reliably ensured.
In the sealing bag with an opening tape of the present invention, the opening tape is preferably uniaxially stretched in the longitudinal direction.
Here, stretching refers to physically stretching a fibrous or film-like polymer material. As a result, the strength and elastic modulus of the polymer material can be improved. When the crystalline polymer is stretched at a temperature not lower than the glass transition temperature and not higher than the melting point, the amorphous portion of the molecules is stretched in the stretching direction, and the crystal As the degree of conversion increases, the molecules are oriented in the stretching direction. As a result, the tensile strength and tensile elastic modulus in the stretching direction increase. Uniaxial stretching refers to stretching in a certain direction. For example, when a film is uniaxially stretched, the strength in the stretching direction is increased compared to the vertical direction, and an anisotropic material is formed. Directivity torn in the direction becomes stronger.
Thereby, the draw ratio is 5 times or more, preferably 8 to 12 times. Since the opening tape is uniaxially stretched in the longitudinal direction, the tearing directivity becomes strong, and therefore, the opening tape can be opened linearly along the longitudinal direction of the opening tape.
In the sealing bag with the opening tape of the present invention, the opening tape is preferably made of a polyolefin resin, and among them, the polyolefin resin is preferably a polyethylene resin or a polypropylene resin.
Here, examples of the polyolefin resin include polyethylene, polypropylene, and polybutene.
Examples of the polyethylene resin include linear low density polyethylene (LLDPE), high density polyethylene (HDPE), and low density polyethylene (LDPE).
Examples of the polypropylene resin include homopolypropylene, random polypropylene, and block polypropylene.
According to this, since the opening tape is made of a polyolefin-based resin, the polyolefin-based resin has thermoplasticity, and thus processing such as molding and stretching is easy.
In addition, the polyethylene resin is excellent in moisture resistance, water resistance, cold resistance, and chemical resistance and is flexible, and is suitable for packaging a liquid package.
Furthermore, since the specific gravity of the polypropylene resin is small, the weight of the packaging bag itself can be reduced.
In the sealing bag with an opening tape of the present invention, it is preferable that the biting tools made of a pair of male and female members are respectively attached to the bag inner surface side.
According to this, since the occlusion device composed of a pair of male and female members is attached to the inner surface of the bag, the occlusion device can be opened and closed again, so that the sealing performance of the bag can be maintained. it can.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a packaging bag 1 according to an embodiment of the present invention.
The packaging bag 1 is configured by sealing four sides of a rectangular polyethylene sheet 10 </ b> A (illustrated front side) and 10 </ b> B (illustrated back side) by heat sealing or the like. These sealed portions become the heat seal portion 12. One side of the rectangular packaging bag 1 is an opening 2.
The opening tape 3 is a polyolefin-based resin-wide tape, and is attached to the opening 2 side by heat sealing or the like on the surface of the polyethylene sheet 10B, and is uniaxially stretched in the longitudinal direction. Has been processed.
The notch 4 is formed in a rectangular shape on the surface of the polyethylene sheet 10 </ b> A on the opening 2 side on the end side of the opening tape 3 of the packaging bag 1.
The cut portion 5 is formed on the end side of the opening tape 3 so as to be inclined with respect to the edge of the opening tape 3 from the polyethylene sheet 10 </ b> B and reach the inside of the opening tape 3. Further, the notch 5 is formed within the range of the notch 4. In this embodiment, the cutout portion 4 and the cutout portion 5 are provided on both the heat seal portions 12 on two sides orthogonal to the opening portion 2.
The bite 11 has a pair of male and female members attached to both sides of the polyethylene sheets 10A and 10B below the opening tape 3 on the opening 2 side by heat sealing or the like. The articulating tool 11 is attached to the inner surface of the packaging bag 1. Here, the bite 11 is made of polyethylene.
As shown in FIG. 2, the notch 4 is formed in a rectangular shape on the surface of the polyethylene sheet 10 </ b> A on the opening 2 side, and the notch 5 is located on the end side of the opening tape 3. It is formed so that it may incline from the cutting base end part 5A located on the outer side and on the polyethylene sheet 10B to reach the cutting end part 5B located inside the opening tape 3.
As shown in FIG. 3, which is a sectional view taken along the line XX in FIG. 2, the cut end portion 5 </ b> B is formed inside the opening tape 3.
As a procedure for opening the packaging bag 1, as shown in FIG. 4, the end side of the opening tape 3 is picked up and pulled in the direction of the arrow to tear it. The overlapping portion of the polyethylene sheet 10B, the opening tape 3, and the polyethylene sheet 10A is torn linearly in a direction parallel to the cut end portion 5B.
As a procedure for manufacturing the packaging bag 1, as shown in FIG. 5, an opening tape 3 is sandwiched between polyethylene sheets 10A and 10B in advance. Under the present circumstances, the notch part 4 is formed in the position corresponding to the opening tape 3 of 10 A of polyethylene sheets. The polyethylene sheets 10 </ b> A and 10 </ b> B and the opening tape 3 are heat-welded by the heat seal bar 20, and the heat seal part 12 is formed at a corresponding position of the notch part 4.
Thereafter, in the cutout portion 4, two sets of cutout portions 5 are formed in a square shape so as to straddle the opening tape 3. At this time, the notch 5 is formed so that the C-shaped end spreads face each other.
Further, the portion where the polyethylene sheet 10 </ b> B, the opening tape 3, and the polyethylene sheet 10 </ b> A are overlapped by the cut bar 30 is cut between the two sets of cut portions 5.
Through the above steps, the heat seal portion 12 shown in the figure is orthogonal to the laminate of the polyethylene sheet 10B, the opening tape 3 and the polyethylene sheet 10A in which the two sets of the cutout portion 4 and the cutout portion 5 are formed. If a heat seal part is formed on the side, a packaging bag is obtained.
According to this embodiment as described above, the following effects are obtained.
(1) A cut portion 5 that reaches the inside of the opening tape 3 that is inclined with respect to the edge of the opening tape 3 is formed on the end portion side of the opening tape 3, so that it is cut when the packaging bag 1 is opened. Since the insert portion 5 can be gripped as it is as a knob portion, it can be easily cut and opened by hand.
Moreover, even if the sticking position of the opening tape 3 has shifted | deviated somewhat because the cutting part 5 inclines, the cutting part 5 is reliably attached to the surface of the polyethylene sheet 10B of the packaging bag 1 and the opening tape 3. Can be formed.
Furthermore, since it is not a structure in which a perforation or the like is provided on one surface inside the packaging bag 1 by being provided with a band-shaped opening tape 3 adhered in parallel to the opening 2, there is a gap with the outside. Therefore, the sealing performance before opening the packaging bag 1 can be ensured.
(2) On the end side of the opening tape 3 of the packaging bag 1, the notch 4 is formed on the surface opposite to the sticking surface of the opening tape 3. Since only the surface of the tape 3 and the polyethylene sheet 10 </ b> A of the packaging bag 1 is provided, the cutout portion 4 becomes thin, so that the cutout portion 5 can be easily raised.
(3) Since the opening tape 3 is uniaxially stretched in the longitudinal direction, the tearing directivity becomes strong, so that the opening tape 3 can be opened linearly along the longitudinal direction of the opening tape 3.
It should be noted that the present invention is not limited to the above-described embodiment, and modifications and improvements within a scope that can achieve the object of the present invention are included in the present invention. For example, as the cut portion 5, the cut end portion 5 </ b> B located inside the opening tape 3 is formed by inclining from the cut base end portion 5 </ b> A located outside the opening tape 3. Without being limited thereto, the cutting base 5 may have the cutting base end 5 </ b> A located inside the opening tape 3.
In this case, the notch part 5 does not need to incline, for example, as shown in FIG. 6, a pair may be mutually parallel.
Moreover, although the notch part 4 and the notch part 5 were each formed in the both ends of the opening tape 3, either one (namely, only the right or left side of the bag of FIG. 1) may be sufficient.
The pair of cut portions 5 may not be formed, and only the one polyethylene sheet 10B and the opening tape 3 can be gripped by the cut portions 4, so that this portion can be easily gripped and tearing can be easily started. .
The opening tape 3 is not limited to a width as in the above-described embodiment, but may be a narrow width, or may be a thin string shape as long as a tensile strength capable of obtaining a tearing guide effect is obtained. .
Furthermore, although the bite tool 11 is provided by being attached to the opening 2 side in the above-described embodiment, it may not be provided. In this case, it is suitable as a disposable packaging bag. Moreover, although the opening tape 3 was made of polyethylene in the above-described embodiment, it is not limited thereto, and may be made of polypropylene.
In addition, the specific structure, shape, and the like when carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.
INDUSTRIAL APPLICABILITY The present invention can be used as a packaging bag for packaging food, medicine, etc., and in particular, can be used as a sealing bag with an opening tape that can be easily opened on the opening side.
[Brief description of the drawings]
FIG. 1 is a plan view of a packaging bag showing an embodiment of the present invention.
FIG. 2 is an enlarged plan view of the packaging bag in the embodiment.
FIG. 3 is a cross-sectional view of the packaging bag of FIG.
FIG. 4 is a view showing a procedure for opening the packaging bag in the embodiment.
FIG. 5 is a diagram showing a manufacturing procedure of the packaging bag in the embodiment.
FIG. 6 is a plan view of a packaging bag showing another embodiment of the present invention.

Claims (8)

包装袋の開口部側に開封テープが設けられる開封テープ付密封袋であって、
前記包装袋の内側の一方の面に、前記開口部に平行に貼着される帯状の開封テープを備え、前記包装袋の前記開封テープの端部側には、前記開封テープの貼着面の反対側の面に切欠部が形成されていることを特徴とする開封テープ付密封袋。A sealing bag with an opening tape provided with an opening tape on the opening side of the packaging bag,
One side of the inside of the packaging bag is provided with a band-like opening tape that is attached in parallel to the opening, and the end of the opening side of the packaging bag is provided with an attachment surface of the opening tape. A sealing bag with an opening tape, wherein a notch portion is formed on the opposite surface. 請求項１に記載の開封テープ付密封袋において、
前記包装袋および／または前記開封テープには、前記開封テープの端部から切り込まれて終端部が前記開封テープの内側に位置する一対の切込部が形成されていることを特徴とする開封テープ付密封袋。In the sealing bag with an opening tape according to claim 1,
The packaging bag and / or the opening tape is formed with a pair of cut portions that are cut from an end portion of the opening tape so that a terminal portion is located inside the opening tape. Sealed bag with tape. 請求項１または請求項２に記載の開封テープ付密封袋において、
前記切込部は、前記開封テープに対して傾斜配置され、各々の切込みの基端部側が前記開封テープの外側に配置されていることを特徴とする開封テープ付密封袋。In the sealing bag with an opening tape according to claim 1 or 2,
The sealing bag with an opening tape, wherein the cut portion is disposed to be inclined with respect to the opening tape, and a base end side of each of the cuts is disposed outside the opening tape. 請求項１から請求項３の何れかに記載の開封テープ付密封袋において、
前記開封テープは、長尺方向に一軸延伸加工されていることを特徴とする開封テープ付密封袋。In the sealing bag with the opening tape in any one of Claims 1-3,
The said opening tape is uniaxially stretched in the elongate direction, The sealing bag with an opening tape characterized by the above-mentioned. 請求項１から請求項４のいずれかに記載の開封テープ付密封袋において、
前記開封テープは、ポリオレフィン系樹脂製であることを特徴とする開封テープ付密封袋。In the sealing bag with an opening tape in any one of Claims 1-4,
The sealing tape with the opening tape, wherein the opening tape is made of polyolefin resin. 請求項５に記載の開封テープ付密封袋において、
前記ポリオレフィン系樹脂は、ポリエチレン系樹脂であることを特徴とする開封テープ付密封袋。In the sealing bag with an opening tape according to claim 5,
The polyolefin resin is a polyethylene resin, a sealing bag with an opening tape. 請求項５に記載の開封テープ付密封袋において、
前記ポリオレフィン系樹脂は、ポリプロピレン系樹脂であることを特徴とする開封テープ付密封袋。In the sealing bag with an opening tape according to claim 5,
The said polyolefin resin is a polypropylene resin, The sealing bag with an opening tape characterized by the above-mentioned. 請求項１から請求項７のいずれかに記載の開封テープ付密封袋において、
雌雄一対の部材の部材からなる咬合具が、袋内面側にそれぞれ貼着されていることを特徴とする開封テープ付密封袋。In the sealing bag with the opening tape in any one of Claims 1-7,
A sealing bag with an opening tape, characterized in that an occlusal tool composed of a pair of male and female members is adhered to the inner surface of the bag.
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WO2003051729A1 (en) 2003-06-26
DK1466831T3 (en) 2008-06-02
KR20040077856A (en) 2004-09-07
ATE384671T1 (en) 2008-02-15
EP1466831B1 (en) 2008-01-23
CN1604867A (en) 2005-04-06
DE60224845T2 (en) 2008-11-13
US20050063624A1 (en) 2005-03-24
DE60224845D1 (en) 2008-03-13
EP1466831A1 (en) 2004-10-13
EP1466831A4 (en) 2005-03-02

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