JPH046046A - Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufacture - Google Patents
Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufactureInfo
- Publication number
- JPH046046A JPH046046A JP2096073A JP9607390A JPH046046A JP H046046 A JPH046046 A JP H046046A JP 2096073 A JP2096073 A JP 2096073A JP 9607390 A JP9607390 A JP 9607390A JP H046046 A JPH046046 A JP H046046A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- sealed
- laminated
- bag
- film
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title claims description 102
- 238000004519 manufacturing process Methods 0.000 title claims description 34
- 239000012943 hotmelt Substances 0.000 claims abstract description 16
- 231100000241 scar Toxicity 0.000 claims description 106
- 208000032544 Cicatrix Diseases 0.000 claims description 60
- 230000037387 scars Effects 0.000 claims description 60
- 238000000034 method Methods 0.000 claims description 37
- 238000002844 melting Methods 0.000 claims description 32
- 239000005022 packaging material Substances 0.000 claims description 31
- 238000010030 laminating Methods 0.000 claims description 22
- 238000003475 lamination Methods 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 239000003814 drug Substances 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 abstract description 4
- 239000005001 laminate film Substances 0.000 abstract 4
- 239000010410 layer Substances 0.000 description 19
- 238000012545 processing Methods 0.000 description 16
- 230000000149 penetrating effect Effects 0.000 description 9
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000011148 porous material Substances 0.000 description 7
- -1 cuts Substances 0.000 description 6
- 239000000123 paper Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 241000758791 Juglandaceae Species 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 235000020234 walnut Nutrition 0.000 description 3
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 229920012753 Ethylene Ionomers Polymers 0.000 description 1
- 241001272720 Medialuna californiensis Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Making Paper Articles (AREA)
- Package Closures (AREA)
- Bag Frames (AREA)
Abstract
Description
本発明は、積層基材に熱溶融フィルムを積層加工した積
層フィルムで成り、各種の食品や医薬品などの内容物を
保護するために周囲を熱封緘してなる密封袋において、
前記内容物の完全な密封が可能であると共に、袋の端縁
部から容易に切断、開封できる易開封性密封袋およびそ
の製造方法並びに前記易開封性密封袋用包装材料および
その製造方法に関する。The present invention relates to a sealed bag which is made of a laminated film obtained by laminating a heat-melting film on a laminated base material, and whose periphery is heat-sealed to protect the contents of various foods, medicines, etc.
The present invention relates to an easy-to-open sealed bag that can completely seal the contents and can be easily cut and opened from the edge of the bag, and a method for producing the same, and a packaging material for the easy-to-open sealed bag and a method for producing the same.
各種の熱可塑性合成樹脂フィルムやアルミ箔、紙などを
積層した、一般的に軟包装といわれる包装材料は、その
軽量性や気密性、容易な熱封緘性などから各種の食料や
医薬品等を長期に保存、貯蔵するのに多用されている。
これらの積層フィルムは密封袋に使用した場合、上記の
理由により、内容物の保護に効果を発揮する半面、その
密封袋の開封にあたっては、積層フィルムが強靭である
ために手指で切断、開封することが困難であった。
このため従来の易開封性密封袋においては、内容物を熱
封緘するにあたり、密封袋の開封を容易にするために密
封袋の端縁部に切り口（ノツチ）を予め設けておき、こ
の切り口から手指で引き裂くという方法が用いられてい
る。
また、積層フィルムを製造した後、この積層フィルムに
予め密封袋の端縁部となる部分に直締、円形等の無数の
細孔、切込、細孔等の傷痕を設け、この積層フィルムを
用いて密封袋を製造し、前記傷痕から袋の開封を容易に
するという方法も用いられている。Packaging materials generally called flexible packaging, which are made by laminating various thermoplastic synthetic resin films, aluminum foil, paper, etc., can be used for long-term storage of various foods, medicines, etc. due to their light weight, airtightness, and easy heat sealability. It is often used for preservation and storage. When these laminated films are used in sealed bags, they are effective in protecting the contents for the reasons mentioned above, but when opening the sealed bags, the laminated films are strong and must be cut and opened with fingers. It was difficult. For this reason, in conventional easy-open sealed bags, when heat-sealing the contents, a notch is provided in advance at the edge of the sealed bag to make it easier to open the sealed bag. The method used is to tear it with your fingers. In addition, after manufacturing the laminated film, a number of scars such as direct tightening, circular, etc. pores, cuts, pores, etc. are provided in advance on the edge of the sealed bag, and the laminated film is A method has also been used in which a sealed bag is manufactured using the scar, and the bag is easily opened from the scar.
【発明が解決しようとする課ＩＥＩ
従来の易開封性密封袋にあっては、例えば密封袋の端縁
に切り口を設けるという方法は、袋の端縁部のどこに切
り口が設けられているか発見し蓋く、また切り口を設け
る箇所を自由に設定することができないという問題点が
あった。
また、この積層フィルムを用いて密封袋に製造する場合
、前記傷痕を設けた部分を熱封緘できないということが
生じる虞れがあり、貫通傷痕が密封袋の積層フィルム上
に位置する場合があり、その結果、本来密封することを
目的とする包装材料の目的を逸してしまうことになり、
内容物の保護に支障をもたらす虞れが生じるという問題
点があった。
また、一般に積層フィルムから密封袋を製造するに際し
、積層フィルムをロール状に巻取り、このロール状の積
層フィルムを製袋機に装着して行う。しかし、積層フィ
ルムに予め密封袋の端縁部となる部分に無数の貫通する
細孔等の傷痕を設けておくという方法では、傷痕加工時
に傷痕の内周縁に微細な「そり」が発生するために、包
装の用に供し、あるいは製袋機にかけるためロール状の
製品とした積層フィルムの傷痕加工部の外径だけが嵩高
に太くなるので、積層フィルムに傷痕加工を施していな
い他の部分は傷痕加工部間でたるむ状態になる。したが
って、積層フィルムにクルミが発生するなど不具合が発
生し、また、このそりを潰し、平滑なフィルムを得るに
は傷痕加工工程投信の加圧ロール間にフィルムを通過さ
せる別工程を要するという問題点があった。
本発明は、叙上の問題点を解決するために開発されたも
ので、内容物を完全に密封可能であると共に、袋の任意
の端縁から容易に切断、開封でき、さらに、クルミやし
わなどの不具合が発生しない良好な易開封性密封袋およ
びその製造方法並びに前記易開封性密封袋用材料および
その製造方法を提供することを目的としている。
【課題を解決するための手段】
上記目的を達成するために、本発明の易開封性密封袋に
おいては、積層基材に熱溶融フィルムを積層加工した積
層フィルムで成口、少な（とも３方を熱封緘してなる密
封袋において、腋部の前記熱封緘部にあたる位置に、積
層基材の少なくとも一層に直棒、円形などの細孔、小切
込等の無数の傷痕を設け、該傷痕を前記熱溶融フィルム
で閉塞すると共に、前記傷痕を袋の端縁線上に臨み形成
したものである。
また、本発明の易開封性密封袋の製造方法においては、
少なくと６３方を熱封緘してなる密封袋を製造するにあ
たり、袋を構成する積層フィルムが積層基材に熱溶融フ
ィルムを積層加工して成り、かつ積層基材の少なくとも
一層に、袋の前記熱封緘部にあたる位置に、無数の傷痕
を設け、該傷痕を前記熱溶融フィルムで閉塞するように
形成したものであり、この積層フィルムを半折し又は２
枚の前記積層フィルムを前記傷痕を設けた部分を互いに
重ね合わせ、核部を熱封緘して密封袋を形成し、次いで
該熱封緘部を切断して前記傷痕を袋の端縁線上に臨み形
成したものである。
さらに、少なくとも３方を熱封緘してなる密封袋を製造
するにあたり、袋を構成する積層フィルムが積層基材に
熱溶融フィルムを積層加工して成り、かつ積層基材の少
なくとも一層に、袋の前記熱封緘部にあたる位置に、無
数の傷痕を設け、該ｆｌＪ痕を前記熱溶融フィルムで閉
塞するように形成したものであり、この積層フィルムの
前記傷痕を設けた部分を切断して端縁線上に前記傷痕を
臨ませて形成し、次いでこの積層フィルムを半折し又は
２枚の積層フィルムを端縁を揃えて重ね合わせ、傷痕を
設けた部分を熱封緘することもできる。
また、本発明の易開封性密封袋用包装材料においては、
少なくとも３方を熱封緘してなる密封袋を構成する積層
フィルムにおいて、該積層フィルムが積層基材に熱溶融
フィルムを積層加工して成り、袋の熱封緘部にあたる位
置に、積層基材の少なくとも一層に無数の傷痕を設け、
該ａｍを前記熱溶融フィルムで閉塞するように形成した
ものである。
また、本発明の易開封性密封袋用包装材料の製造方法に
おいては、少なくとも３方を熱封緘してなる密封袋を構
成する積層フィルムを製造するにあたり、袋の熱封緘部
にあたる位置に、積層基材の少なくとも一層に無数の傷
痕を設け、次いでこの傷痕を設けた積層基材に熱溶融フ
ィルムを押出し積層加工して熱溶融フィルムが前記傷痕
を閉塞するようにしたものである。
さらに、積層基材にアンカーコーティングした後、この
積層基材にアンカーコート層も共に貫通する傷痕を設け
、次いで熱溶融フィルムを押出し積層加工することもで
きる。
また、タンデム押出しラミネート機による第１ラミネー
ト加工で押出し積層加工した積層基材に貫通する傷痕を
設けた後、前記タンデム押出しラミネート機による第２
ラミネート加工て熱溶融フィルムを押出し積層加工をす
ることもできる。
さらに、回転駆動手段により回転駆動する駆動ローラと
、該駆動ローラに圧接し従動するＷ、敬個の小巾な圧接
ローラを設け、該複数個の圧接ローラを袋の熱封緘部に
あたろ位置に適宜間隔を介して移動調節自在に配設する
と共に、前記駆動ローラおよび又は前記複数個の圧接ロ
ーラの全周面に硬質で黴細な突起を無数に設け、これら
複数個の圧接ローラと駆動ローラ間に積層基材を通過せ
しめて、密封袋の熱封緘部にあたる位置の積層基材に無
数の傷痕を設けることもできる。[Issues to be solved by the invention IEI] In the case of conventional easy-open sealed bags, for example, the method of providing a cut at the edge of the sealed bag is difficult to find where on the edge of the bag the cut is made. There was a problem in that it was not possible to freely set the location where the lid was to be closed or where the incision was to be made. In addition, when manufacturing a sealed bag using this laminated film, there is a risk that the part where the scar is provided cannot be heat sealed, and the penetrating scar may be located on the laminated film of the sealed bag. As a result, the purpose of the packaging material, which is originally intended to be sealed, is lost.
There was a problem in that there was a risk that the protection of the contents would be compromised. Furthermore, when producing a sealed bag from a laminated film, the laminated film is generally wound up into a roll, and the roll-shaped laminated film is mounted on a bag making machine. However, with the method of creating in advance scars such as countless penetrating pores on the laminated film at the edge of the sealed bag, minute "warps" occur on the inner periphery of the scars when the scars are processed. In addition, only the outer diameter of the scarred part of the laminated film that is used for packaging or rolled into a bag-making machine becomes bulky and thick, so other parts of the laminated film that are not scarred become bulky and thick. becomes sagging between the scar-processed areas. Therefore, defects such as walnuts occur in the laminated film, and in order to crush these warps and obtain a smooth film, a separate process is required in which the film is passed between the pressure rolls of the investment trust in the scar treatment process. was there. The present invention was developed to solve the above problems, and it is possible to completely seal the contents, easily cut and open from any edge of the bag, and furthermore, It is an object of the present invention to provide a good easy-to-open sealed bag that does not cause such problems, a method for manufacturing the same, and a material for the easy-to-open sealed bag and a method for manufacturing the same. [Means for Solving the Problems] In order to achieve the above object, the easy-open sealed bag of the present invention uses a laminated film obtained by laminating a hot melt film on a laminated base material. In a sealed bag made by heat-sealing, numerous scars such as straight rods, circular pores, small cuts, etc. are provided in at least one layer of the laminated base material at a position corresponding to the heat-sealed part of the armpit, and the scars are is closed with the heat-melting film, and the scar is formed on the edge line of the bag.Furthermore, in the method for manufacturing an easily openable sealed bag of the present invention,
In manufacturing a sealed bag that is heat-sealed on at least 63 sides, the laminated film constituting the bag is formed by laminating a heat-melting film on a laminated base material, and at least one layer of the laminated base material has the Numerous scars are provided at positions corresponding to the heat-sealed portion, and the scars are closed with the heat-melting film, and this laminated film is folded in half or folded into two.
The parts of the laminated film with the scars are placed one on top of the other, the core part is heat sealed to form a sealed bag, and the heat sealed part is then cut to form the scars along the edge line of the bag. This is what I did. Furthermore, in manufacturing a sealed bag that is heat-sealed on at least three sides, the laminated film constituting the bag is formed by laminating a heat-melting film on a laminated base material, and at least one layer of the laminated base material is coated with the bag. Numerous scars are provided at positions corresponding to the heat-sealed portion, and the flJ scars are formed so as to be closed with the heat-melting film, and the portion of the laminated film where the scars are provided is cut and cut along the edge line. It is also possible to form the scar so that the scar is exposed, then fold the laminated film in half or overlap the two laminated films with their edges aligned, and heat seal the portion where the scar is provided. Moreover, in the packaging material for an easy-open sealed bag of the present invention,
In a laminated film constituting a hermetically sealed bag that is heat-sealed on at least three sides, the laminated film is formed by laminating a heat-melting film on a laminated base material, and at least one of the laminated base materials is placed at a position corresponding to the heat-sealed part of the bag. There are countless scars on one layer,
The am is formed so as to be closed with the heat-melting film. In addition, in the method for producing a packaging material for an easy-open sealed bag of the present invention, when producing a laminated film constituting a sealed bag formed by heat-sealing at least three sides, a laminated film is placed at a position corresponding to the heat-sealed portion of the bag. Numerous scars are provided on at least one layer of the base material, and then a hot melt film is extruded and laminated onto the laminated base material provided with the scars so that the heat melt film closes the scars. Furthermore, after the laminated base material is anchor-coated, scars that also pass through the anchor coat layer can be provided on the laminated base material, and then the hot-melt film can be extruded and laminated. Further, after providing a penetrating scar on the laminated base material which has been extruded and laminated in the first lamination process using the tandem extrusion laminating machine, the second lamination process using the tandem extrusion laminating machine is performed.
It is also possible to perform lamination processing by extruding a hot melt film. Further, a drive roller that is rotationally driven by a rotational drive means, a W that is in pressure contact with the drive roller and driven, and a number of narrow pressure rollers are provided, and the plurality of pressure rollers are placed in a position where they hit the heat sealing part of the bag. The drive roller and/or the plurality of pressure rollers are arranged so as to be movable and adjustable at appropriate intervals, and are provided with countless hard and fine protrusions on the entire circumferential surface of the drive roller and/or the plurality of pressure rollers. It is also possible to pass through the laminated base material in between, and provide countless scars on the laminated base material at the position corresponding to the heat-sealed portion of the sealed bag.
上記のように構成された易開封性密封袋内に密封された
内容物を取り出す場合、密封袋の任意の端縁を手指で引
き裂こうとすると、袋は端縁線上に設けられている積層
フィルムの積層基材の傷痕から破断し、その破断は袋の
内部方向の傷痕へと伝播してゆき、容易に内容物を取り
出せる。
このとき、前記傷痕を閉塞している溶融フィルムζま強
靭性が小さいので手指での破断に対して全く支障になる
ことはない。
また、易開封性密封袋の製造方法においては、袋の熱封
緘部あたる位置に予め傷痕を設けた積層フィルムを半折
又は２枚重ね合わせ、傷痕を設けた部分を互いに重ね合
わせた後に、核部を熱封緘して密封袋を製造するに際し
、熱封緘して密封袋を形成した後にその熱封緘部を切断
する方法にしても、熱封緘する前に全周端縁線上に臨み
前記傷痕を形成した積層フィルムを重ねた後、熱封緘し
て密封袋を形成する方法にしても、傷痕が必ず袋の端縁
線上に臨み形成される。しかも、たとえ積層フィルムの
傷痕を設けた部分から外れて熱封緘されたとしても、積
層基材に設けた傷痕を溶融フィルムにて閉塞されている
ので密封袋の内容物は安全に保護される。
また、易開封性密封袋用包装材料（ごおいては、積層基
材に予め袋の熱封緘部にあたる位置に無数の貫通する傷
痕を設け、この傷痕を熱溶融フィルムで閉塞しているの
で、この材料の傷痕を設けた部分を重ね合わせて、核部
を熱封緘することにより、上記の易開封性密封袋を容易
に、且つ効率よく製造できる包装材料である。When taking out the contents sealed in the easy-to-open sealed bag configured as described above, if you try to tear off any edge of the sealed bag with your fingers, the bag will be removed from the laminated layer provided on the edge line. The film breaks from the scratches on the laminated base material, and the breaks propagate to the scratches in the interior of the bag, allowing the contents to be easily taken out. At this time, since the toughness of the molten film ζ closing the scar is small, there is no problem with breaking it with fingers. In addition, in the method of manufacturing an easy-to-open sealed bag, a laminated film with scars provided in advance at the position corresponding to the heat-sealed part of the bag is folded in half or two sheets are stacked together, and after the parts with the scars are overlapped with each other, the core is When manufacturing a sealed bag by heat-sealing the bag, even if the method involves cutting the heat-sealed part after forming the bag by heat-sealing, the scars are cut along the entire circumference edge line before heat-sealing. Even if the formed laminated films are stacked and then heat-sealed to form a sealed bag, scars are always formed on the edge line of the bag. Moreover, even if the laminated film is heat-sealed away from the scarred part, the contents of the sealed bag are safely protected because the scarred part of the laminated base material is closed with the molten film. In addition, in packaging materials for easy-to-open sealed bags, numerous penetrating scars are formed in advance on the laminated base material at positions corresponding to the heat-sealed portion of the bag, and these scars are closed with a heat-melting film. By overlapping the scarred parts of this material and heat-sealing the core, the above-mentioned easy-to-open sealed bag can be easily and efficiently produced as a packaging material.
【実施例］
先ず、易開封性密封袋１０の実施例について図面を参照
して説明すると、第１図（Ａ）、（Ｂ）においては、１
０ｔよ積層フィルム１０）を半折又は２枚重ねて各種の
食品や医薬品などの内容物を収容し、積層フィルム１０
）の少なくとも３方を熱封緘して前記内容物を完全に密
封した密封袋であり、袋の端縁部から容易に切断、開封
できる易開封性密封袋である。
易開封性密封袋１０を構成する積層フィルム１０）は強
靭性に富む積層基材１２に強靭性は低いが溶融し熱封緘
し易い熱溶融フィルム１３を押出ラミネート法により積
層加工して成るものであり、積層基材１２としては、セ
ロファン、ポリエステル、ナイロン、ポリプロピレン等
のプラスチックフィルムやアルミ箔、またクラフト紙、
純白ロール紙、上質紙、アート紙などの各種紙類などが
用いられ、これらの基材類を単層または予め、いくっか
の基材類を積層したものとして用いられる。
そして熱溶融フィルム１３としてはポリエチレン樹脂、
エチレン酢酸ビニル共重合樹脂、アイオノマー樹脂、ポ
リプロピレン樹脂などが主に用いられろ。
そして、易開封性密封袋１０の熱封緘部１６は第２図（
Ａ）、（Ｂｌ、（Ｃ）に示すように積層フィルム１０）
，１０）の熱溶融フィルム１３．１３がそれぞれ互いに
接するように重ね合わさり、熱溶融フィルム１３．１３
が溶融して、熱封緘しており、この熱封緘部における積
層フィルム１０）の積層基材１２に、該積層基材１２の
少なくとも一層に無数の細孔から成ろ傷ＷＸ１５を設け
、該傷痕１５内に熱溶融フィルム１３が流入して傷痕１
５を閉塞している。
なお、細孔から成る傷痕１５は貫通していないものが含
まれていてもよい。また傷［１６は切り裂き可能にさえ
なれば、貫通、非貫通のエンボス孔、小切込、裂傷孔も
しくはこれらの組合せのようなものであってもよく、密
封袋１０の幅方向となる封緘部１６ｍにこの封緘部１６
ａの端縁線上に臨み且つその幅方向に直線、微小孔、楕
円形、半月形等の任意の形状で形成することができろ。
第２図（Ａ）においては、積層基材１２の傷痕１５内に
熱溶融フィルム１３が流入して核部を閉塞している状態
を示しており、第２図（Ｂ）において（よ、数置類の基
材を積層してなる積層基材１２のうち、強靭性が高い積
層基材１２ｍに傷痕１５を設け、この積層基材１２ｍに
比較的強靭性が低い積層基材１２ｂを積層加工した積層
基材１２に、熱溶融フィルム１３を押出しラミネート加
工により積層加工し、前記傷痕１５内に熱溶融フィルム
１３が流入した状態を示している。さらに第２図（Ｃ）
においては、積層フィルム１０）は積層基材１２と熱溶
融フィルム１３の接着力を向上させるために積層基材１
２の表面にポリウレタン、ポリブチレン、ポリエチレン
・イミンなどが主として用いられるアンカー剤といわれ
る接着剤の薄い溶液を塗布し、いわゆるアンカーコート
（プライマーコートともいう）シ、乾燥した後、該アン
カーコート層１４に熱溶融フィルム１３を押出し積層加
工しており、傷痕１５はアンカーコート層１４を貫通し
て積層基材１２に設けられ、該傷痕１５内に熱溶融フィ
ルム１３が流入して傷痕１５を閉塞している状態を示し
ている。
なお、前記傷痕１５は袋の端縁線上に臨み形成されてお
り、さらに、端縁線より袋内方に向けて設けている。
また、易開封性密封袋１０の熱封緘部１６は第１図（Ａ
）に示すように、傷痕１５が設けられている熱封緘部１
６ｍと傷！！１６が設けられていない熱封緘部１６ｂと
で構成されてもよく、必ずしも傷痕１５が熱封緘部１６
全体に設けられていなくてもよい。
前記易開封性密封袋１０内に密封された内容物を取り出
す場合は、易開封性密封袋１０の傷痕１５を設けた部分
の熱封緘部１６ｓの任意の端縁を手指で引き裂くと積層
フィルム１０）の積層基材１２は強靭性が高いので、本
来は切断し難いのであるが、傷痕１５が袋１０の端縁線
上に臨み形成されており、また積層フィルム１０）の熱
溶融フィルム１３は強靭性が低いので、該傷痕１５から
切り口が発生し、該切り口からの亀裂が第３図に示すよ
うに袋の内部方向の傷痕１５へと伝播してゆき、容易に
積層フィルム１０）を引き裂いて内容物を取や出せる。
また、易開封性密封袋１０においては第２図（Ａ）の傷
痕１５ｍに示すように、万−傷＄１５が熱封緘部１６か
ら外れて袋の積層フィルム１０）に位置してしまった場
合でも、該傷＠ １５ ａは熱溶融フィルム１３によゆ
閉塞されているので袋内の密封状態は完全に保たれ、内
容物は安全に保護される。
次に易開封性密封袋１Ｇを構成する積層フィルム１０）
の製造方法すなわち易開封性密封袋用包装材料の製造方
法について第４図を参照して説明する。
第４図は本発明における押出ラミネート法による積層加
工及び傷痕加工法の基本的工程を示すものである。
前述の易開封性密封袋１０の実施例で述べたように強靭
性に富む積層基材１２をロール状に巻き、このロール状
の積層基材１２を送出部２１に装着して送り出す。積層
基材１２は無地の場合もあるカ、一般には印刷されたも
のが多く、中には前工程でいくつかの層に積層加工され
たものも使用される。送出部２１で送り出された積層基
材１２はロー５２６を通過してアンカーコート１ｕｌｌ
ｓ ２２ ニ送られ、このアンカーコート部２２で一般
的に有機溶剤に稀釈した接着剤が薄く塗布されアンカー
コート層１４が形成されろ。この接着剤は一般にアンカ
ー剤あるいは接着促進剤といわれ、ポリウレタン、ポリ
ブタジェン、ポリエチレンイミンなどが用いられる。次
いでこのアンカーコート（プライマーコートともいう）
された積層基材１２のアンカーコート層１４ば乾燥機２
３内で乾燥され、ｆＩＩＪ痕加工部２４に送り出される
。
なお、アンカーコートは後に積層基材１２と熱溶融フィ
ルム１３が押出しラミネート法により積層加工される工
程に先立って積層基材１２と熱溶融フィルム１３の接着
力を向上させるために行われる工程であり、積層基材１
２が紙などの場合は熱溶融フィルム１３と接着し易いの
で、このアンカーコーティングの工程が省略される場合
もある。
次いで傷痕加工部２４に送り出された積層基材１２は、
傷痕加工部２４で易開封性密封袋１０の熱封緘部１６に
あたる位置に無数の傷＠ｉｓが設けられろ。したがって
アンカーコーティングされた積層基材１２はアンカーコ
ート層１４にも共に傷痕１５が形成されることになる。
このように積層基材１２にアンカーコーティングを施し
たのちに傷１ｉｊ１５を設けることにより、アンカー剤
の液が積層基材１２を貫通して後工程の積層加工に支障
をきたすという不具合を避けることができる。すなわち
、もし積層基材１２に傷痕加工を行ったのちに、アンカ
ーコーティングを施すならば、アンカー剤が貫通傷痕１
５から浸透してしまい、フィルムの巻取りや後工程にお
いて積層基材同志が接着されるという事態が発生する。
傷痕加工部２４では、表面が硬質で微細な突起２５を有
するローラと、このローラに圧接するローラとの間に積
層基材１２を通過せしめて積層基材１２に無数の貫通す
る傷痕１５を形成するものである。
傷痕加工部２４の加工装置および方法の一例として第５
図を参照して説明すると、傷痕加工部２４の加工装置は
図示せざる回転駆動手段により回転駆動する駆動ローラ
２７ｍ、２７ｂを積層基材１２が通過するラインに直列
して平行に設け、駆動ローラ２７ａ、２７ｂのそれぞれ
に圧接し従動する圧接ローラ２８ｍ、２８ｂを設けてい
る。
そして、これら駆動ローラ２７ｓ、ｂ又は圧接ローラ２
８ｓ、ｂの全周面に硬質で黴細な突起２５を無数に設け
ている。さらに一方の駆動ローラ２７ｍに圧接する圧接
ローラ２８８は複数の小幅な円盤状の圧接ローラ２８ｍ
を適宜間隔を介して移動調整自在に配設し、これらの圧
接ローラ２８−を易開封性密封袋１０の熱封緘部１６に
あたる位置に配設している。そして、他方の駆動ローラ
２７ｂに圧接する圧接ローラ２８ｂば、円筒状の圧接ロ
ーラ２８ｂであり、駆動ローラ２７ｂに圧接層自在に設
けている。したがって、駆動ローラ２７０と圧接ローラ
２８ｍ＋どの間に積層基材１２を通過させた場合は、積
層基材１２に易開封性密封袋１０の熱封緘部１６のあた
る位置に縦列状に傷ＷＬ１５を形成することができ、駆
動ローラ２７ｂと圧接ローラ２８ｂとの間に積層基材１
２を通過させた場合は、圧接ローラ２８ｂを駆動ローラ
２７に適当な時間的間隔を置いて圧接層を交互にくり返
すことにより易開封性密封袋１０の熱封緘部１６にあた
る位置に横列状に傷痕１５を設けることができる。
なお、駆動ローラ２７ｓ、ｂと圧接ローラ２８■、ｂの
組合せは、第５図に示すように両方共に用いろことがで
きるが、どちらか一方のみを用いることもできる。
以上のように傷痕加工部２４で傷痕加工を施された積層
基材１２は押出し積層加工部３０に送り出され、第４図
に示すように、互いに圧接する圧力ロール３１と冷却ロ
ール３２間を通過する。
圧力ロール３１と冷却ロール３２の圧接部分の上方には
積層基材１２に積層する熱溶融フィルム１３を形成する
ために、溶融樹脂をフィルム状に押出すためのダイ３４
が設けられ、その上方には押出機３５を介してホッパー
３６が設けられている。該ホッパー３６にポリエチレン
、エチレン酢酸ビニル共重合体、アイオノマー、ボリプ
。ピ。
ンなどの樹脂の原料を投入し、押出機３５で加熱溶融し
た後、溶融したｍ脂はフラットダイ３４のスリットから
一定の厚みにフィルム状に押出されて熱溶融フィルム１
３が形成される。
この熱溶融フィルム１３は、送り出された積層基材１２
の上に積層され、圧力ロール３１と冷却ロール３２の間
で圧着冷却され固化される。このとき、積層基材１２に
貫通して設けられた無数の傷痕１５内（よそれぞれ熱溶
融フィルム１３が流入して傷８１５の内周縁に発生した
微細な「そり」が熱溶融フィルムで覆われて平滑で、且
っ傷［１５が熱溶融フィルム１３で閉塞された貫通孔の
ない積層フィルム１０）、すなわち本発明の易開封性密
封袋用包装材料を得ることができる。次いで、この包装
材料である積層フィルム１０）は巻取部２９の図示せざ
ろモータにより回転駆動されろローラにロール状に巻き
取られる。
以上のようにして、製造された積層フィルム１０）はア
ンカーコーティングを施してない場合は、第６図（Ａ）
に示すように易開封性密封袋１０の熱封緘部１６にあた
る位置で積層基材１２に設けられた無数の傷１５！１６
内に熱溶融フィルム１３が流入し、またアンカーコーテ
ィングを施した場合は、第６図（Ｂ）に示すようにアン
カーコート層１４を貫通して積層基材１２に設けられた
傷痕１５内に熱溶融フィルム１３が流入してそれぞれど
ちらの場合でも傷［１６が熱溶融フィルム１３で閉塞さ
れた「そり」のない平滑な易開封性密封袋用包装材料が
得られる。
さらに、積層フィルム１０）の製造方法として、タンデ
ム押出しラミネート機と称されろいわゆる第１ラミネー
ト加工と第２ラミネート加工を製造ラインに直列に設け
た装置で積層フィルム１０）を製造する場合には、積層
基材１２！Ｉに第１ラミネート加工で溶融樹脂の積層基
材１２ｂを積層加工して積層基材１２と成し、この積層
基材１２に第４図の傷痕加工部２４と同様の方法で易開
封性密封袋１０の熱封緘部１６にあたる位置に無数の傷
痕１５を設けた後、第４図の押出し積層加工部３０と同
様に、傷痕１５を設けた積層基材１２を第２ラミネート
加工の圧力ロール３１と冷却ロール３２間に通過して積
層基材１２に熱溶融フィルム１３を積層加工することも
できる。
この方法により製造された積層フィルム１０）は第６図
（Ｃ１に示すように積層基材１２ｍに積層加工された積
層基材１２ｂからなる積層基材１２に、易開封性密封袋
１０の熱封緘部１６にあたる位置に設けられた無数の傷
痕１５内に熱溶融フィルム１３が流入して傷痕１５が熱
溶融フィルム１３て閉塞された平滑な易開封性密封袋用
包装材料である。
また別の積層フィルム１０）の製造方法として、いくつ
かの基材類を積層してなる積層基材１２のうち、強靭性
が高い積層基材１２ｍに、第４図の傷痕加工部２４と同
様の方法で易開封性密封袋１０の熱封緘部１６にあたる
位置に無数の傷痕１５を設けた後、この積層基材１２ｍ
に比較的強靭性が低い積層基材１２ｂを積層加工して積
層基材１２を成し、該積層基材１２に第４図の押出し積
層加工部３０と同様の方法で熱溶融フィルム１３を積層
加工することもできろ。
乙の方法により製造された積層フィルム１０）ば第６図
＜ＤＪに示すようにいくつかの基材類を積層してなる積
層基材１２のうち、強靭性が高い積層基材１２ｍに易開
封性密封袋１０の熱封緘部１６にあたる位置に設けられ
た無数の傷痕１５内に熱溶融フィルム１３が流入して傷
痕１５が熱溶融フィルム１３で閉塞された平滑な易開封
性密封袋用包装材料である。
したがって、積層フィルム１０）はロール状に巻き取ら
れてもクルミやしわなどの発生しない良好な包装材料で
ある。
さらに、以上の前述したすべての方法により製造された
積層フィルム１０）は、第５図に示す傷痕加工方法によ
り、第７図（Ａ） （Ｂ） （Ｃ１（Ｄ）に示
すように積層基材１２に易開封性密封袋１０の熱封緘部
１６にあたる位置に無数の傷痕１５を縦列状および横列
状に様々に組み合わせて設けた易開封製密封袋用包装材
料となり、易開封性密封袋１０を効率よく製造すること
を可能にするものである。
次に易開封性密封袋１０の製造方法について説明すると
、第７図（Ａ）〜（Ｄ）に示すような前述した易開封性
密封袋用包装材料である積層フィルム１０）を第８図（
Ａ）、 （Ｂ）に示すように半析し又は第８図（Ｃ）
（Ｄ）に示すように２枚の積層フィルム１０）を
重ねて、それぞれＳ痕１５を設けた部分を互いに重ね合
わせ、腋部および必要であれば他の傷痕１５を設けてい
ない部分も、熱封緘して内容物を封入した密封袋を形成
し、次いでこの熱封緘部１６を長手方向に略中央から切
断して、この切断線を易開封性密封袋１０の端縁とする
ことにより、傷痕１５を易開封性密封袋１０の端縁線上
に臨み形成するようにすることができる。例えば、第７
図（Ａ）に示すように傷痕１５を設けた部分が縦列状の
みである積層フィルム１０）が第８図（Ａ）に示すよう
に半折されて熱封緘されろと、傷痕１５を設けている熱
封緘部１６８とｆｌｙ痕１５を設けていない１６ｂが形
成された密封袋となり、第７図（Ｂ）に示すように練製
状と構製状に傷痕１５を設けている積層フィルム１０）
が第８図（Ｂ）に示すように半折されて、熱封緘される
と、前記熱封緘部１６ｓのみが形成された密封袋となり
、それぞれの熱封緘部１６を長手方向に略中央で切断す
ることにより易開封性密封袋１０が製造される。
さらに、積層フィルム１０）を２枚重ねて熱封緘する場
合も、上記と同様であり、第７図（Ｃ）に示す積層フィ
ルム１０）は第８図（Ｃ）に示すように熱封緘部１６ｓ
と熱封緘部１６ｂが形成され、第７図（ＤＪに示す積層
フィルム１０）は第８図（Ｄ）に示すように熱封緘部１
６ａのみが形成された密封袋となる。
また、第７図（Ａ）〜（Ｄ）に示す積層フィルム１０）
を熱封緘する前にそれぞれ熱封緘部１６ａ１熱封緘部１
６ｂにあたる位置の長手方向に略中央で切断して１個の
易開封性密封袋１０を構成するための一枚の積層フィル
ム１０）として該積層フィルム１０）の端縁線上に臨み
傷痕１５を形成し、次いでこの積層フィルム１０）を半
折し、又は２枚の積層フィルム１０）を重ねて端縁を揃
えて重ね合わせ、全周端縁を熱封緘して内容物を密封し
て易開封性密封袋１０を製造することができる。
【発明の効果】
本発明は、以上説明したように構成されているので、以
下に記載されるような効果を奏する。
易開封性密封袋においては、袋の傷痕が設けられている
部分の端縁の任意の位置から自由にしかも容易に引き裂
き、開封することができ、しかも、たとえ製造上の何ら
かのミスにより傷痕が設けられている部分が熱封緘部か
ら外れた貸玉に存在するようになったとしても、完全な
密封が可能であり、内容物を安全に保護できろ易開封性
密封袋を得ることができた。
また、易開封性密封袋の製造方法においては、傷痕が袋
の端縁線上に臨み形成されるので、袋を端縁から容易に
切り裂き、開封できる易開封性密封袋を製造する方法で
ある。
さらに、傷痕は熱溶融フィルムにより完全に閉塞されて
いる易開封性密封袋用包装材料を使用しているので、上
記易開封性密封袋と同様の理由で完全な密封袋を製造可
能である。
さらに、熱封緘して密封袋を形成したのち熱封緘部で切
断する方法においては、多量の易開封性密封袋を効率よ
く製造することが可能である。
また、易開封性密封袋用包装材料においては、予め傷痕
を易開封性密封袋の熱封緘部にあたる位置に設けており
、しかも傷痕は熱溶融フィルムにより完全に閉塞されて
いるので、上記した効果のある易開封性密封袋を容易に
しかも多量に効率よく製造できる包装材料を得ることが
できた。
また、易開封性密封袋用包装材料の製造方法においては
、易開封性密封袋の熱封緘部にあたる位置に傷痕を容易
に設けることができるのでサイズの異なる易開封性密封
袋を容易にしかも効率よく製造できる包装材料であると
共に、積層基材に熱溶融フィルムを積層加工するときに
傷痕は必ず熱芯数フィルムにより閉塞されると同時に傷
痕加工の際に生じた「そり」ば閉塞されて、平滑な積層
フィルムとなるので、傷痕の「そりＪを潰す加圧工程を
別に設ける必要がなくなり、従来の一工程を減らすこと
ができ、又、この積層フィルムを巻き取ってロール状の
製品にした場合にもクルミやしわが発生しない良好な包
装材料を得ることができた。[Example] First, an example of the easy-open sealed bag 10 will be described with reference to the drawings.
The laminated film 10) is folded in half or stacked in two to accommodate contents such as various foods and medicines.
) is heat-sealed on at least three sides to completely seal the contents, and is an easy-to-open sealed bag that can be easily cut and opened from the edge of the bag. The laminated film 10) constituting the easy-to-open sealed bag 10 is made by laminating a highly tough laminated base material 12 with a heat-melting film 13, which has low toughness but is easy to melt and heat seal, by extrusion lamination. Yes, as the laminated base material 12, plastic films such as cellophane, polyester, nylon, polypropylene, aluminum foil, kraft paper, etc.
Various types of paper such as pure white roll paper, high-quality paper, and art paper are used, and these base materials can be used as a single layer or as a stack of several base materials laminated in advance. As the heat-melting film 13, polyethylene resin,
Ethylene-vinyl acetate copolymer resin, ionomer resin, polypropylene resin, etc. are mainly used. The heat-sealed portion 16 of the easy-open sealed bag 10 is shown in FIG.
Laminated film 10) as shown in A), (Bl, and (C))
, 10) are stacked so as to be in contact with each other, and the heat melting films 13.13
is melted and heat-sealed, and the laminated base material 12 of the laminated film 10) at this heat-sealed portion is provided with a seepage wound WX15 consisting of numerous pores in at least one layer of the laminated base material 12, and the scar is The hot melt film 13 flows into the inside of the scar 15.
5 is occluded. Note that the scars 15 made of pores may include scars that do not penetrate through the pores. In addition, the flaw [16] may be a penetrating or non-penetrating embossed hole, a small cut, a tear hole, or a combination thereof, as long as it can be torn, and the flaw [16] may be a hole in the sealing area in the width direction of the sealed bag 10. This sealing section 16 is located at 16m.
It can be formed in any shape such as a straight line, a microhole, an ellipse, a half-moon, etc., facing on the edge line of a and in the width direction. FIG. 2(A) shows a state in which the heat-melting film 13 has flowed into the scar 15 of the laminated base material 12 to close the core, and FIG. Of the laminated base material 12 formed by laminating different base materials, scars 15 are provided on the laminated base material 12m with high toughness, and a laminated base material 12b with relatively low toughness is laminated on this laminated base material 12m. The heat-melt film 13 is laminated onto the laminated base material 12 by extrusion lamination, and the heat-melt film 13 has flowed into the scar 15.Furthermore, FIG. 2(C)
In order to improve the adhesive strength between the laminated base material 12 and the hot melt film 13, the laminated film 10) is
A thin solution of an adhesive called an anchor agent, which is mainly made of polyurethane, polybutylene, polyethylene imine, etc., is applied to the surface of the layer 2 to form a so-called anchor coat (also called a primer coat). After drying, the anchor coat layer 14 is The heat melt film 13 is extruded and laminated, and the scar 15 is provided on the laminated base material 12 by penetrating the anchor coat layer 14, and the heat melt film 13 flows into the scar 15 to close the scar 15. It shows the state of being. The scar 15 is formed facing on the edge line of the bag, and is further provided toward the inside of the bag from the edge line. The heat-sealed portion 16 of the easy-open sealed bag 10 is shown in FIG. 1 (A
), the heat-sealed part 1 is provided with a scar 15.
6m and scratches! ! 16 may be formed with a heat-sealed portion 16b in which no heat-sealed portion 16 is provided, and the scar 15 is not necessarily provided with a heat-sealed portion 16b.
It does not have to be provided throughout. When taking out the contents sealed in the easy-open sealed bag 10, tear any edge of the heat-sealed portion 16s of the easy-open sealed bag 10 where the scar 15 is provided with your fingers, and the laminated film 10 will be removed. The laminated base material 12 of ) has high toughness and is originally difficult to cut, but scars 15 are formed on the edge line of the bag 10, and the heat-melting film 13 of the laminated film 10) is tough. Since the strength is low, a cut is generated from the scar 15, and the crack from the cut propagates to the scar 15 in the inner direction of the bag as shown in FIG. 3, easily tearing the laminated film 10). Contents can be removed. Furthermore, in the case of the easy-open sealed bag 10, as shown in the scar 15m in FIG. However, since the wound 15a is closed by the heat-melting film 13, the inside of the bag is completely sealed and the contents are safely protected. Next, the laminated film 10 constituting the easy-open sealed bag 1G
The manufacturing method of the packaging material for easy-open sealed bags will be explained with reference to FIG. FIG. 4 shows the basic steps of lamination processing and scar processing method by extrusion lamination method in the present invention. As described in the above-mentioned embodiment of the easy-to-open sealed bag 10, the highly tough laminated base material 12 is wound into a roll, and the roll-shaped laminated base material 12 is attached to the delivery section 21 and sent out. The laminated base material 12 may be plain, but it is generally printed, and some are laminated into several layers in a previous process. The laminated base material 12 sent out by the delivery section 21 passes through the row 526 and is coated with 1ull of anchor coat.
s 22 , and in this anchor coat section 22, an adhesive generally diluted with an organic solvent is applied thinly to form the anchor coat layer 14. This adhesive is generally called an anchor agent or an adhesion promoter, and polyurethane, polybutadiene, polyethyleneimine, etc. are used. Next, this anchor coat (also called primer coat)
The anchor coat layer 14 of the laminated base material 12 and the dryer 2
3 and sent to the fIIJ mark processing section 24. Note that the anchor coating is a process performed to improve the adhesive strength between the laminated base material 12 and the hot melt film 13, prior to the process in which the laminated base material 12 and the hot melt film 13 are later laminated by extrusion lamination. , laminated base material 1
If 2 is made of paper or the like, this anchor coating step may be omitted because it easily adheres to the heat-melting film 13. Next, the laminated base material 12 sent to the scar processing section 24 is
Numerous scratches @is are provided in the scar processing section 24 at positions corresponding to the heat sealing section 16 of the easy-open sealed bag 10. Therefore, scars 15 are formed on the anchor coat layer 14 of the anchor-coated laminated base material 12 as well. By providing the scratches 1ij 15 after applying the anchor coating to the laminated base material 12 in this way, it is possible to avoid the problem that the anchor agent liquid penetrates the laminated base material 12 and interferes with the lamination process in the subsequent process. can. In other words, if the anchor coating is applied after the laminated base material 12 is scar-processed, the anchor agent will form the penetrating scar 1.
5, and a situation occurs in which the laminated base materials are adhered to each other during film winding or post-processing. In the scar processing section 24, the laminated base material 12 is passed between a roller having a hard surface and fine protrusions 25 and a roller that is in pressure contact with this roller, thereby forming countless penetrating scars 15 on the laminated base material 12. It is something to do. The fifth example is an example of the processing device and method for the scar processing section 24.
To explain with reference to the figure, the processing device of the scar processing section 24 includes drive rollers 27m and 27b which are rotatably driven by a rotation drive means (not shown), which are arranged in series and parallel to the line through which the laminated base material 12 passes. Pressing rollers 28m and 28b are provided to press and follow the rollers 27a and 27b, respectively. These drive rollers 27s, b or pressure roller 2
A countless number of hard and fine protrusions 25 are provided on the entire circumferential surface of 8s and 8b. Further, the pressure roller 288 that presses against one drive roller 27m is a plurality of narrow disc-shaped pressure rollers 28m.
are disposed so as to be movable and adjustable at appropriate intervals, and these pressure rollers 28- are disposed at a position corresponding to the heat-sealing portion 16 of the easy-open sealed bag 10. The pressure roller 28b that comes into pressure contact with the other drive roller 27b is a cylindrical pressure roller 28b, and the pressure roller 28b is freely provided on the drive roller 27b. Therefore, when the laminated base material 12 is passed between the drive roller 270 and the pressure roller 28m+, scratches WL15 are formed in a vertical line on the laminated base material 12 at the position where the heat-sealed portion 16 of the easy-to-open sealed bag 10 hits. The laminated base material 1 can be placed between the drive roller 27b and the pressure roller 28b.
2, the pressure rollers 28b are applied to the drive roller 27 at appropriate time intervals and the pressure layers are alternately arranged in a horizontal row at the position corresponding to the heat-sealed portion 16 of the easy-to-open sealed bag 10. A scar 15 can be provided. As for the combination of the drive rollers 27s and 27b and the pressure rollers 28b and 28b, both can be used as shown in FIG. 5, but it is also possible to use only one of them. The laminated base material 12 that has been scar-processed in the scar-processing section 24 as described above is sent to the extrusion lamination processing section 30, and passes between a pressure roll 31 and a cooling roll 32 that are in pressure contact with each other, as shown in FIG. do. Above the pressure contact portion of the pressure roll 31 and the cooling roll 32, there is a die 34 for extruding the molten resin into a film shape in order to form a hot melt film 13 to be laminated on the laminated base material 12.
A hopper 36 is provided above it via an extruder 35. The hopper 36 contains polyethylene, ethylene vinyl acetate copolymer, ionomer, and polypropylene. Pi. After inputting resin raw materials such as resin and heating and melting them in an extruder 35, the molten resin is extruded into a film with a constant thickness through the slit of a flat die 34 to form a heat-melted film 1.
3 is formed. This heat-melting film 13 is transferred to the laminated base material 12 that has been sent out.
The material is laminated on top of the material, and is pressed and cooled between a pressure roll 31 and a cooling roll 32 to be solidified. At this time, within the numerous scratches 15 provided through the laminated base material 12 (the heat-melted film 13 flows into each of the fine "warps" generated at the inner periphery of the scratches 815), the heat-melted film covers them. Thus, it is possible to obtain the easy-open packaging material for sealed bags of the present invention, which is smooth and free from scratches (the laminated film 10 having no through holes in which the 15 are closed with the heat-melting film 13). Next, the laminated film 10), which is the packaging material, is rotated by an unillustrated motor of the winding section 29 and wound around a roller. When the laminated film 10) manufactured as described above is not coated with an anchor coating, it is shown in FIG. 6(A).
As shown in the figure, there are countless scratches 15 and 16 on the laminated base material 12 at the position corresponding to the heat-sealed part 16 of the easy-to-open sealed bag 10.
When the heat-melting film 13 flows into the layer and an anchor coating is applied, heat penetrates the anchor coat layer 14 and enters the scar 15 provided on the laminated base material 12, as shown in FIG. 6(B). The molten film 13 flows in, and in each case, a smooth, easy-open, sealed bag packaging material without "warpage" in which the flaws [16] are closed by the heat fused film 13 is obtained. Furthermore, as a method for manufacturing the laminated film 10), when the laminated film 10) is manufactured using an apparatus called a tandem extrusion laminating machine in which a so-called first lamination process and a second lamination process are provided in series on a production line, Laminated base material 12! A laminated base material 12b made of molten resin is laminated on I in the first lamination process to form a laminated base material 12, and this laminated base material 12 is easily sealed in the same manner as the scar-processed portion 24 in FIG. After providing countless scars 15 at the positions corresponding to the heat sealing portion 16 of the bag 10, the laminated base material 12 provided with the scars 15 is transferred to the pressure roll 31 for second lamination, similar to the extrusion lamination processing section 30 in FIG. The heat-melting film 13 can also be laminated onto the laminated base material 12 by passing between the cooling roll 32 and the laminated base material 12 . The laminated film 10) produced by this method is heat-sealed with an easily openable sealed bag 10 on a laminated base material 12 consisting of a laminated base material 12b laminated onto a laminated base material 12m as shown in FIG. 6 (C1). This is a smooth, easy-to-open, sealed bag packaging material in which a heat-melt film 13 flows into numerous scars 15 provided at positions corresponding to portions 16, and the scars 15 are closed by the heat-melt film 13. As a manufacturing method for the film 10), among the laminated base materials 12 formed by laminating several base materials, a highly tough laminated base material 12m is easily etched in the same manner as the scar-processed portion 24 in FIG. After creating numerous scars 15 at the positions corresponding to the heat-sealed portions 16 of the openable sealed bag 10, this laminated base material 12m
A laminated base material 12b having relatively low toughness is laminated to form a laminated base material 12, and a hot melt film 13 is laminated on the laminated base material 12 in the same manner as in the extrusion lamination processing section 30 in FIG. You can also process it. The laminated film 10) manufactured by the method of B) is a laminated base material 12 formed by laminating several base materials as shown in FIG. A packaging material for a smooth, easy-to-open sealed bag in which a heat-melt film 13 flows into numerous scars 15 provided at positions corresponding to heat-sealed portions 16 of a heat-sealable bag 10, and the scars 15 are closed with the heat-melt film 13. It is. Therefore, the laminated film 10) is a good packaging material that does not develop walnuts or wrinkles even when wound into a roll. Furthermore, the laminated film 10) manufactured by all the above-mentioned methods is processed by the scar treatment method shown in FIG. This is a packaging material for an easy-to-open sealed bag, in which numerous scars 15 are provided in various combinations in columns and rows at positions corresponding to the heat-sealed portions 16 of the easy-to-open sealed bag 10. Next, a method for manufacturing the easy-open sealed bag 10 will be described. The laminated film 10) which is a packaging material is shown in Figure 8 (
A), Semi-analyzed as shown in (B) or Figure 8 (C)
As shown in (D), the two laminated films 10) are overlapped, and the parts provided with the S marks 15 are overlapped with each other, and the armpits and other parts not provided with the scars 15, if necessary, are also heated. A sealed bag with the contents sealed therein is formed, and then this heat-sealed portion 16 is cut from approximately the center in the longitudinal direction, and this cut line is used as the edge of the easy-to-open sealed bag 10 to eliminate scars. 15 can be formed so as to face the edge line of the easy-open sealed bag 10. For example, the seventh
As shown in FIG. 8(A), the laminated film 10) in which the scars 15 are formed only in vertical columns is folded in half and heat-sealed as shown in FIG. 8(A). The sealed bag is formed with a heat-sealed portion 168 and a layer 16b without fly marks 15, and as shown in FIG.
When the bag is folded in half and heat-sealed as shown in FIG. 8(B), a sealed bag is obtained in which only the heat-sealed portion 16s is formed, and each heat-sealed portion 16 is cut approximately at the center in the longitudinal direction. By doing so, the easily openable sealed bag 10 is manufactured. Furthermore, when two laminated films 10) are overlapped and heat-sealed, the process is similar to the above, and the laminated film 10) shown in FIG.
7 (the laminated film 10 shown in DJ) is formed with the heat sealed portion 16b as shown in FIG. 8(D).
The sealed bag has only 6a formed therein. Moreover, the laminated film 10 shown in FIGS. 7(A) to (D)
Heat sealing section 16a1 and heat sealing section 1 before heat sealing.
6b to form a scar 15 on the edge line of the laminated film 10) for constructing one easy-open sealed bag 10. Then, this laminated film 10) is folded in half, or two laminated films 10) are stacked with their edges aligned, and the entire circumferential edge is heat-sealed to seal the contents and make it easy to open. A sealed bag 10 can be manufactured. [Effects of the Invention] Since the present invention is configured as described above, it produces the effects as described below. An easy-open sealed bag can be easily torn and opened from any position on the edge of the part of the bag where the scar is formed, and even if the scar is caused by some manufacturing error, the bag can be opened easily. Even if the sealed part were removed from the heat-sealed part of the rental ball, it was possible to completely seal the bag and safely protect the contents, making it possible to obtain an easy-to-open sealed bag. . In addition, in the method for producing an easy-to-open sealed bag, since the scar is formed on the edge line of the bag, the bag can be easily torn from the edge to produce an easy-to-open sealed bag that can be opened. Furthermore, since the packaging material for an easy-to-open sealed bag is used, in which the scar is completely closed by a heat-melting film, a completely sealed bag can be manufactured for the same reason as the above-mentioned easy-to-open sealed bag. Furthermore, in the method of heat-sealing to form a sealed bag and then cutting at the heat-sealing section, it is possible to efficiently produce a large amount of easily-openable sealed bags. In addition, in the packaging material for easy-open sealed bags, scars are provided in advance at positions corresponding to the heat-sealed parts of the easy-open sealed bags, and the scars are completely closed by the heat-melting film, so that the above-mentioned effects can be achieved. It was possible to obtain a packaging material that can easily and efficiently produce easy-to-open sealed bags in large quantities. In addition, in the method for producing packaging materials for easy-open sealed bags, it is possible to easily create scars at the heat-sealed portion of the easy-open sealed bags, making it easy to produce easy-open sealed bags of different sizes and more efficiently. It is a packaging material that can be manufactured easily, and when laminating a hot-melt film on a laminated base material, the scars are always closed by the hot-core film, and at the same time, the "warpage" that occurs during scar processing is closed. Since it becomes a smooth laminated film, there is no need for a separate pressurizing process to crush the warpage of the scratches, reducing the number of conventional processes. In some cases, a good packaging material without walnuts or wrinkles could be obtained.
第１図は本発明の易開封製密封袋を示し、同図（Ａ）は
２枚の積層フィルムを重ね合わせた密封袋の斜視図、同
図（Ｂ）は１枚の積層フィルムを半折した密封袋の斜視
図、第２図（Ａ）〜（Ｃ）は第１図（Ａ）のＡ−Ａ線上
の断面図、第３図は本発明の易開封性密封袋の端縁を切
り裂いた亀裂の状態を示す要部斜視図、第４図は本発明
の易開封性密封袋用包装材料の製造工程を示す概略図、
第５図は傷痕加工部の装置の一例を示す斜視図、第６図
（Ａ）〜（Ｄ）は易開封性密封袋用包装材料の要部断面
図、第７図（Ａ）〜（Ｄ）＋ま易開封性密封袋用包装材
料の傷痕を設けた部分の状態例を示す平面図、第８図（
Ａ）〜（Ｄ）は易開封性密封袋用包装材料の製造方法の
一例を示す図である。Fig. 1 shows an easy-to-open sealed bag of the present invention, (A) is a perspective view of a sealed bag made by stacking two laminated films, and (B) is a perspective view of one laminated film folded in half. 2(A) to (C) are sectional views taken along the line A-A in FIG. 1(A), and FIG. FIG. 4 is a schematic diagram showing the manufacturing process of the packaging material for easy-to-open sealed bags of the present invention;
Fig. 5 is a perspective view showing an example of the device for the scar processing section, Figs. ) + Fig. 8 (
A) to (D) are diagrams showing an example of a method for producing a packaging material for an easy-open sealed bag.
Claims (10)
ィルムで成り、少なくとも３方を熱封緘してなる密封袋
において、該袋の前記熱封緘部にあたる位置で袋の端縁
線上に臨み、積層基材の少なくとも一層に無数の傷痕を
設け、該傷痕を前記熱溶融フィルムで閉塞したことを特
徴とする易開封性密封袋。(1) In a sealed bag made of a laminated film obtained by laminating a heat-melting film on a laminated base material and heat-sealed on at least three sides, facing onto the edge line of the bag at a position corresponding to the heat-sealed part of the bag, 1. An easily openable sealed bag, characterized in that numerous scars are provided on at least one layer of a laminated base material, and the scars are closed with the heat-melting film.
るにあたり、袋を構成する積層フィルムが積層基材に熱
溶融フィルムを積層加工して成り、かつ積層基材の少な
くとも一層の、袋の前記熱封緘部にあたる位置に、無数
の傷痕を設け、該傷痕を前記熱溶融フィルムで閉塞する
ように形成し、この積層フィルムを半折し又は２枚の前
記積層フィルムを前記傷痕を設けた部分を互いに重ね合
わせ、該部を熱封緘して密封袋を形成し、次いで該熱封
緘部を切断して前記傷痕を袋の端縁線上に臨み形成した
ことを特徴とする易開封性密封袋の製造方法。(2) In manufacturing a sealed bag that is heat-sealed on at least three sides, the laminated film constituting the bag is formed by laminating a heat-melting film on a laminated base material, and at least one layer of the laminated base material Numerous scars were provided at positions corresponding to the heat-sealed portions, the scars were formed to be closed with the heat-melting film, and the laminated film was folded in half or two laminated films were provided with the scars. An easy-open sealed bag characterized in that the parts are stacked on top of each other and the parts are heat-sealed to form a sealed bag, and then the heat-sealed part is cut to form the scar facing on the edge line of the bag. manufacturing method.
るにあたり、袋を構成する積層フィルムが積層基材に熱
溶融フィルムを積層加工して成り、かつ積層基材の少な
くとも一層の、袋の前記熱封減部にあたる位置に、無数
の傷痕を設け、該傷痕を前記熱溶融フィルムで閉塞する
ように形成し、この積層フィルムの前記傷痕を設けた部
分を切断して端縁線上に臨み前記傷痕を形成し、次いで
この積層フィルムを半折し又は２枚の積層フィルムを端
縁を揃えて重ね合わせ、傷痕を設けた部分を熱封緘して
密封したことを特徴とする易開封性密封袋の製造方法。(3) In manufacturing a sealed bag that is heat-sealed on at least three sides, the laminated film constituting the bag is formed by laminating a heat-melting film on a laminated base material, and at least one layer of the laminated base material Numerous scars are provided at positions corresponding to the heat-sealing reduction portions, the scars are closed with the heat-melting film, and the portion of the laminated film where the scars are provided is cut to face the edge line. The easy-open seal is characterized in that the scar is formed, then the laminated film is folded in half or two laminated films are stacked with their edges aligned, and the part where the scar is formed is sealed by heat sealing. How to make bags.
る積層フィルムにおいて、該積層フィルムが積層基材に
熱溶融フィルムを積層加工して成り、袋の熱封緘部にあ
たる位置の、積層基材の少なくとも一層に無数の傷痕を
設け、該傷痕を前記熱溶融フィルムで閉塞するように形
成したことを特徴とする易開封性密封袋用包装材料。(4) In a laminated film constituting a sealed bag that is heat-sealed on at least three sides, the laminated film is formed by laminating a heat-melting film on a laminated base material, and the laminated film is formed by laminating a heat-melting film on a laminated base material, and 1. A packaging material for an easily openable sealed bag, characterized in that numerous scars are provided on at least one layer of the material, and the scars are closed with the heat-melting film.
る積層フィルムを製造するにあたり、袋の熱封緘部にあ
たる位置の、積層基材の少なくとも一層に無数の傷痕を
設け、この傷痕を設けた積層基材に熱溶融フィルムを押
出し積層加工して熱溶融フィルムが前記傷痕を閉塞する
ようにしたことを特徴とする易開封性密封袋用包装材料
の製造方法。(5) In manufacturing a laminated film constituting a sealed bag that is heat-sealed on at least three sides, numerous scars are provided on at least one layer of the laminated base material at the position corresponding to the heat-sealed portion of the bag; 1. A method for producing a packaging material for an easily openable sealed bag, comprising extruding and laminating a heat-melt film on a laminated base material so that the heat-melt film closes the scars.
層基材にアンカーコート層も共に貫通する傷痕を設け、
次いで熱溶融フィルムを押出し積層加工した請求項（５
）記載の易開封性密封袋用包装材料の製造方法。(6) After applying anchor coating to the laminated base material, providing a scar that also penetrates the anchor coat layer on this laminated base material,
Claim (5) in which the hot melt film is then extruded and laminated.
) The method for manufacturing the packaging material for easy-open sealed bags.
ト加工で押出し積層加工した積層基材に傷痕を設けた後
、前記タンデム押出しラミネート機による第２ラミネー
ト加工で熱溶融フィルムを押出し積層加工をした請求項
（５）記載の易開封性密封袋用包装材料の製造方法。(7) A claim in which scars are formed on the laminated base material that has been extruded and laminated in the first lamination process using a tandem extrusion laminating machine, and then the hot melt film is extruded and laminated in the second lamination process using the tandem extrusion laminating machine. 5) The method for producing the packaging material for an easily openable sealed bag.
該駆動ローラに圧接し従動する圧接ローラを設け、該圧
接ローラを袋の熱封緘部にあたる位置に配設すると共に
、前記駆動ローラ又は前記圧接ローラの全周面に硬質で
微細な突起を無数に設け、これら圧接ローラと駆動ロー
ラ間に積層基材を通過せしめて、積層基材に密封袋の熱
封緘部にあたる位置に無数の傷痕を設けた請求項（５）
記載の易開封性密封袋用包装材料の製造方法。(8) a drive roller that is rotationally driven by a rotational drive means;
A pressure roller that is in pressure contact with and follows the drive roller is provided, and the pressure roller is disposed at a position corresponding to the heat-sealing portion of the bag, and countless hard and fine protrusions are provided on the entire circumferential surface of the drive roller or the pressure roller. claim (5), wherein the laminated base material is passed between the pressure roller and the drive roller, and numerous scars are formed on the laminated base material at positions corresponding to the heat-sealed portion of the sealed bag.
A method for manufacturing the packaging material for an easy-to-open sealed bag.
る位置に適宜間隔を介して移動調整自在に配設した請求
項（８）記載の易開封性密封袋用包装材料の製造方法。(9) The method for producing a packaging material for an easy-to-open sealed bag according to claim (8), wherein a plurality of narrow pressure rollers are movably arranged at appropriate intervals at positions corresponding to the heat-sealed portion of the bag. .
に設け、前記圧接ローラを駆動ローラに適宜時間を介し
て圧接離を交互に行わせた請求項（８）記載の易開封性
密封袋用包装材料の製造方法。(10) The easy-to-open sealed bag according to claim (8), wherein a cylindrical pressure roller is provided so as to be able to press and separate from the drive roller, and the drive roller alternately presses and separates the pressure roller at an appropriate time. Method for producing packaging materials for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096073A JPH046046A (en) | 1990-04-11 | 1990-04-11 | Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2096073A JPH046046A (en) | 1990-04-11 | 1990-04-11 | Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH046046A true JPH046046A (en) | 1992-01-10 |
Family
ID=14155232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2096073A Pending JPH046046A (en) | 1990-04-11 | 1990-04-11 | Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH046046A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081009U (en) * | 1995-02-06 | 1996-06-21 | 株式会社細川洋行 | Packaging bag |
| JPH08267618A (en) * | 1995-02-02 | 1996-10-15 | Seiji Kagawa | Easy tearability-imparting device and production of unsealed bag with easy tearability |
| EP0895138A2 (en) * | 1997-08-01 | 1999-02-03 | Canon Kabushiki Kaisha | Sealing member, process cartridge and developer supply container |
| WO2003067335A2 (en) * | 2002-02-08 | 2003-08-14 | Cf Technologies | Sealing member for toner cartridge |
| US6760556B2 (en) | 2002-07-16 | 2004-07-06 | Cf Technologies | Sealing member and toner container provided with such a sealing member |
| US6775493B2 (en) | 2002-02-08 | 2004-08-10 | Cf Technologies | Sealing member for toner cartridge |
| US6778793B2 (en) | 2002-02-08 | 2004-08-17 | Cf Technologies | Sealing member for toner cartridge |
| US6782220B2 (en) | 2002-02-08 | 2004-08-24 | Cf Technologies | Sealing member for toner cartridge |
| JP2005212867A (en) * | 2004-01-30 | 2005-08-11 | Dainippon Printing Co Ltd | Individual packaging laminate and individual packaging bag using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58160251A (en) * | 1982-03-03 | 1983-09-22 | 旭化成株式会社 | Sealed subdividing bag and its manufacture |
| JPS60193805A (en) * | 1984-06-07 | 1985-10-02 | 旭化成株式会社 | Automatic bag making filler |
| JPS62182067A (en) * | 1986-01-23 | 1987-08-10 | 旭化成株式会社 | Easy-open sealing bag, manufacture thereof and tool used forsaid manufacture |
-
1990
- 1990-04-11 JP JP2096073A patent/JPH046046A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58160251A (en) * | 1982-03-03 | 1983-09-22 | 旭化成株式会社 | Sealed subdividing bag and its manufacture |
| JPS60193805A (en) * | 1984-06-07 | 1985-10-02 | 旭化成株式会社 | Automatic bag making filler |
| JPS62182067A (en) * | 1986-01-23 | 1987-08-10 | 旭化成株式会社 | Easy-open sealing bag, manufacture thereof and tool used forsaid manufacture |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08267618A (en) * | 1995-02-02 | 1996-10-15 | Seiji Kagawa | Easy tearability-imparting device and production of unsealed bag with easy tearability |
| JPH081009U (en) * | 1995-02-06 | 1996-06-21 | 株式会社細川洋行 | Packaging bag |
| EP0895138A2 (en) * | 1997-08-01 | 1999-02-03 | Canon Kabushiki Kaisha | Sealing member, process cartridge and developer supply container |
| EP0895138A3 (en) * | 1997-08-01 | 2001-12-19 | Canon Kabushiki Kaisha | Sealing member, process cartridge and developer supply container |
| WO2003067335A2 (en) * | 2002-02-08 | 2003-08-14 | Cf Technologies | Sealing member for toner cartridge |
| WO2003067335A3 (en) * | 2002-02-08 | 2003-12-11 | Cf Technologies | Sealing member for toner cartridge |
| US6775493B2 (en) | 2002-02-08 | 2004-08-10 | Cf Technologies | Sealing member for toner cartridge |
| US6778793B2 (en) | 2002-02-08 | 2004-08-17 | Cf Technologies | Sealing member for toner cartridge |
| US6782220B2 (en) | 2002-02-08 | 2004-08-24 | Cf Technologies | Sealing member for toner cartridge |
| US6934487B2 (en) | 2002-02-08 | 2005-08-23 | Cf Technologies | Sealing member for toner cartridge |
| US6760556B2 (en) | 2002-07-16 | 2004-07-06 | Cf Technologies | Sealing member and toner container provided with such a sealing member |
| JP2005212867A (en) * | 2004-01-30 | 2005-08-11 | Dainippon Printing Co Ltd | Individual packaging laminate and individual packaging bag using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2360764C (en) | Packaging comprised of a foil-shaped composite material and method for producing said packaging | |
| US5874155A (en) | Easy-opening flexible packaging laminates and packaging materials made therefrom | |
| CA2061481C (en) | Post-applied zipper base with grip strip | |
| US5512337A (en) | Packages with controlled easy open features | |
| AU730200B2 (en) | Hermetically sealed package, and method and machine for manufacturing it | |
| US20130008134A1 (en) | Straight-split pouch, method for manufacturing same, and device for manufacturing the pouch | |
| US5983594A (en) | Adhesively resealable package, method and apparatus | |
| EP2216260B1 (en) | End-face treated liquid pouring nozzle and method of producing the same | |
| MXPA00009933A (en) | Sealant layer for container lid. | |
| JP5900455B2 (en) | Drug packaging bag, sheet for the bag, method for packaging the drug, and method for forming scars on the sheet | |
| JP2018535900A (en) | Cold sealed flexible film package and method | |
| JPH046046A (en) | Easy-to-open sealing bag, its manufacture, wrapping material for same bag and its manufacture | |
| CA2552301C (en) | Packaging roll stock with windows | |
| CA1209894A (en) | Laminated material and a method for manufacturing the same | |
| JP2534628Y2 (en) | Easy tearing packaging material | |
| JPS5974077A (en) | Package | |
| US6936318B2 (en) | No tear pharmaceutical pouch | |
| EP4028335B1 (en) | Flexible packaging with internal release | |
| JP2548609B2 (en) | Easy-open packaging bag | |
| JPH02233380A (en) | Manufacture of easy-opening sealed container | |
| JPH07112745A (en) | Structure of sealed sub-division bag and its manufacture | |
| JP2022039751A (en) | Packaging bag | |
| JP2003026234A (en) | Double bag package and its manufacturing method | |
| JPS5924700Y2 (en) | Cup-shaped easy-open container | |
| JPH08324588A (en) | Easily unsealable bag |