JP2725600B2 - Easy-open laminated bag - Google Patents
Easy-open laminated bagInfo
- Publication number
- JP2725600B2 JP2725600B2 JP6151404A JP15140494A JP2725600B2 JP 2725600 B2 JP2725600 B2 JP 2725600B2 JP 6151404 A JP6151404 A JP 6151404A JP 15140494 A JP15140494 A JP 15140494A JP 2725600 B2 JP2725600 B2 JP 2725600B2
- Authority
- JP
- Japan
- Prior art keywords
- score
- layer
- laminated bag
- line
- 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.)
- Expired - Fee Related
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- 229910052782 aluminium Inorganic materials 0.000 claims description 32
- 239000011888 foil Substances 0.000 claims description 31
- 229920001684 low density polyethylene Polymers 0.000 claims description 15
- 239000004702 low-density polyethylene Substances 0.000 claims description 15
- 229920006284 nylon film Polymers 0.000 claims description 11
- 229920005672 polyolefin resin Polymers 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 7
- 229920000098 polyolefin Polymers 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 229920001225 polyester resin Polymers 0.000 claims description 6
- 239000004645 polyester resin Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 5
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 123
- 230000000694 effects Effects 0.000 description 9
- 239000012790 adhesive layer Substances 0.000 description 7
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 229920006267 polyester film Polymers 0.000 description 5
- 239000004716 Ethylene/acrylic acid copolymer Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000227653 Lycopersicon Species 0.000 description 2
- 235000007688 Lycopersicon esculentum Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 2
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000008960 ketchup Nutrition 0.000 description 1
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 1
- 229940117841 methacrylic acid copolymer Drugs 0.000 description 1
- 239000012053 oil suspension Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Description
【０００１】[0001]
【産業上の利用分野】本発明は積層フイルムで形成した
包装用積層袋に関し、更に詳しくは積層フイルムの構成
と特殊なスコア線を組み合わせることにより易開封性を
付与した包装用積層袋に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated bag for packaging formed of a laminated film, and more particularly to a laminated bag for packaging provided with easy-openability by combining a structure of the laminated film with a special score line.
【０００２】[0002]
【従来の技術】従来包装用の袋として種々の袋が使用さ
れている。被包装物の保護を図るため酸素の透過の防
止、水分の蒸発と外部からの透過を防ぎ、フレーバー成
分の透過を防止する等種々の要求がある。そのため袋を
構成するフイルムには積層フイルムが使用されている。
この他包装袋で問題となるのは易開封性である。易開封
性とは単に袋が容易に開封されるということではなく、
開封したとき袋の表と裏側のフイルムの切断線の位置に
差異がなく正確な開口が形成されることを意味する。切
断線の位置にズレが生ずると開口が不正となり内容物が
こぼれるという問題を生ずる。2. Description of the Related Art Conventionally, various bags have been used as packaging bags. There are various demands for protecting the packaged articles, such as preventing the permeation of oxygen, preventing evaporation of water and permeation from the outside, and preventing permeation of flavor components. Therefore, a laminated film is used for the film constituting the bag.
Another problem with packaging bags is easy opening. Easy opening does not mean that the bag is easily opened,
This means that when the bag is opened, there is no difference between the positions of the cutting lines of the film on the front and back sides of the bag, and an accurate opening is formed. If the position of the cutting line is shifted, the opening is incorrect and the contents are spilled.
【０００３】[0003]
【発明が解決しようとする課題】易開封性を向上させる
ため単純に、引裂性の大きいフイルム例えば一軸延伸フ
イルムで袋を作成しても袋の開封性は良好にならない。
通常製造工程上の必要性から広巾のフイルムを一軸延伸
し所定の巾に切断して連続的に製袋するが、フイルムを
一軸延伸しても巾方向の端部近傍と中心側とは延伸方向
と延伸度が一致しないため、このようなフイルムで作成
した袋を引裂くと袋を形成する表裏面２枚のフイルムの
引裂かれる方向が上下方向で正確に一致しないので、引
裂中にずれが生じる。つまり、一方のフイルムがより下
方または上方に向って裂け上下のずれが発生し、袋の口
部が表裏同じ高さにならず内容物がこぼれる傾向が強
い。袋の耐衝撃性を向上するために最内面にポリオレフ
ィンフイルム層、例えばホモプロピレンを使用すると開
封方向の規制が出来ず、またエチレン−プロピレンブロ
ック共重合体を使用すると開封時に伸びるため易開封性
とならない。しかしながら、ヒートシール性の付与と内
容物と接触する面の安全性とを考慮すると最内面にはポ
リオレフィン系樹脂のフイルム層を配置する必要があ
る。Even if a bag is simply made of a film having a large tearing property, for example, a uniaxially stretched film in order to improve the easy opening property, the opening property of the bag is not improved.
Usually, a wide film is uniaxially stretched and cut to a predetermined width to continuously make a bag, because of the necessity in the manufacturing process, but even if the film is uniaxially stretched, the vicinity of the end in the width direction and the center side are in the stretching direction. When the bag made of such a film is torn, the tearing directions of the two films forming the bag do not exactly match in the up-down direction, resulting in displacement during tearing. . That is, one of the films tears downward or upward to cause a vertical shift, and the mouth of the bag is not at the same height as the front and back sides, and the content tends to spill. If a polyolefin film layer such as homopropylene is used on the innermost surface to improve the impact resistance of the bag, the opening direction cannot be regulated, and if an ethylene-propylene block copolymer is used, the bag expands at the time of opening. No. However, in consideration of imparting heat sealability and safety of the surface in contact with the contents, it is necessary to arrange a polyolefin resin film layer on the innermost surface.
【０００４】[0004]
【課題を解決するための手段】本発明は、 「１． （ａ）最外層は２軸延伸ポリエステル樹脂フイ
ルム層、２軸延伸ナイロンフイルム層または２軸延伸ポ
リオレフインフイルム層であって、蛍光配向法による配
向係数がそれぞれ０．１≦Ｌ＜０．９、０．１≦Ｍ＜
０．９、０．２≦Ｎ≦０．８を満足する延伸フイルムで
あり、（ｂ）中間層はアルミ箔を含む層であり、（ｃ）
最内層はポリオレフィン系樹脂フイルム層である、積層
フイルムで形成した積層袋の胴部の最外層に、深さが最
外層フイルム厚みの１／５以上である引裂方向に対して
傾斜した短線状のスコアを引裂方向に配列したスコア線
と、該スコアと逆方向に傾斜した短線状のスコアを引裂
方向に配列したスコア線とを交互に配置し、引裂開始部
に向って末広がりになるハの字形のスコアにより形成さ
れるスコア線を設置した易開封性積層袋。 ２． 胴部周辺のシール部に引裂の取っ掛かりとなる、
Ｉ字形またはＶ字形あるいはＵ字形のノッチを配置し
た、１項に記載された易開封性積層袋。 ３． 胴部周辺のシール部の外層に引裂の取っ掛かりと
なる粗面部を設けた、１項に記載された易開封性積層
袋。 ４． スコア線が積層袋の全面に配置され、引裂の取っ
掛かり部であるノッチまたは粗面部が該袋の引裂部のシ
ール部全面に配置された、１項ないし３項のいずれか１
項に記載された易開封性積層袋。 ５． 引裂の取っ掛かり部であるノッチまたは粗面部を
積層袋のシール部の引裂部に部分的に配置し、スコア線
の始点がこの取っ掛かり部近傍に設置された、１項ない
し３項のいずれか１項に記載された易開封性積層袋。 ６． （ａ）最外層は２軸延伸ポリエステル樹脂フイル
ム層、２軸延伸ナイロンフイルム層または２軸延伸ポリ
オレフインフイルム層であって、蛍光配向法による配向
係数がそれぞれ０．１≦Ｌ＜０．９、０．１≦Ｍ＜０．
９、０．２≦Ｎ≦０．８を満足する延伸フイルムであ
り、（ｂ）中間層はアルミ箔を含む層であり、（ｃ）最
内層はポリオレフィン系樹脂フイルム層である、積層フ
イルムの巾方向両端部の内層を合せて接合した背張部を
有する筒状体を形成し、背張部を筒状体に密着させ、筒
状体の上下開口端を接合するとともに該開口上下端近傍
に背張部の上下各端を接合した積層袋の胴部の引裂開始
部の最外層に引裂の取っ掛かりとなる微小凹凸からなる
粗面部を配置し、積層袋の背張り部の最外層に引裂方向
に対して傾斜した短線状のスコアを引裂方向に配列した
スコア線と、該スコアと逆方向に傾斜した短線状のスコ
アを引裂方向に配列したスコア線とを交互に配置し、引
裂開始部に向って末広がりになるハの字形のスコアによ
り形成されるスコア線を設置した易開封性積層袋。 ７． 微小凹凸からなる粗面部を、積層袋の表測フイル
ムと裏側フイルムの折り返し部の最外層表面に配置し
た、６項に記載された易開封性積層袋。 ８． 微小凹凸からなる粗面部を積層袋の表側フイルム
と裏側フイルムの折り返し部の全面に配置した、６項ま
たは７項に記載された易開封性積層袋。 ９． ハの字形スコアを配列したスコア線を積層袋に密
着した背張部の表側の外層フイルムに設置した、６項ま
たは７項に記載された易開封性積層袋。 １０． ハの字形スコアを配列したスコア線を積層袋に
密着した背張部の該袋に密着した面の外層フイルムにも
設置した、６項ないし９項のいずれか１項に記載された
易開封性積層袋。 １１． スコア線が積層袋の最外層全面に配置され、引
裂の取っ掛かり部である粗面部が積層袋の表側フイルム
と裏側フイルムの折り返し部の全面に配置された、６項
ないし１０項のいずれか１項に記載された易開封性積層
袋。 １２． 引裂の取っ掛かり部である粗面部が積層袋の表
側フイルムと裏側フイルムの折り返し部に部分的に配置
され、スコア線の始点がこの取っ掛かり部の近傍に配置
された、６項ないし１０項のいずれか１項に記載された
易開封性積層袋。 １３． 引裂方向に対して傾斜した短線状のスコアを引
裂方向に配列したスコア線と、該スコアと逆方向に傾斜
した短線状のスコアを引裂方向に配列したスコア線を夫
々１本づつ組み合わせて配置した、１項ないし１２項の
いずれか１項に記載された易開封性積層袋。 １４． 引裂方向に対して傾斜した短線状のスコアを引
裂方向に配列したスコア線と、該スコアと逆方向に傾斜
した短線状のスコアを引裂方向に配列したスコア線を一
方の傾斜方向のスコア線を１本挾んで逆の傾斜方向のス
コア線を２本組み合わせて配置した、１項ないし１２項
のいずれか１項に記載された易開封性積層袋。 １５． 引裂方向に対して傾斜した短線状のスコアを引
裂方向に配列したスコア線と、該スコアと逆方向に傾斜
した短線状のスコアを引裂方向に配列したスコア線を夫
々交互に複数本配置した、１項ないし１２項のいずれか
１項に記載された易開封性積層袋。 １６． スコア線が連続した線状に形成された、１項な
いし１５項のいずれか１項に記載された易開封性積層
袋。 １７． スコア線が不連続であって引裂方向に部分的に
配置された、１項ないし１５項のいずれか１項に記載さ
れた易開封性積層袋。 １８． 引裂方向に対して傾斜した短線状のスコアを引
裂方向に配列したスコア線と、該スコアと逆方向に傾斜
したスコア線を引裂方向に配列したスコア線とを０．５
ｍｍ〜１０ｍｍの間隔で交互に設置した、１項ないし１
７項のいずれか１項に記載された易開封性積層袋。 １９． 引裂方向に対して傾斜した短線状のスコアの傾
斜角度が１５°〜８０°である、１項ないし１８項のい
ずれか１項に記載された易開封性積層袋。 ２０． 引裂方向に対して傾斜した短線状のスコアを配
列したスコア線のスコアのピッチが０．３ｍｍ〜５ｍｍ
である、１項ないし１９項のいずれか１項に記載された
易開封性積層袋。 ２１． 中間層がアルミ箔からなる、１項ないし２０項
のいずれか１項に記載された易開封性積層袋。 ２２． 中間層がポリエチレン層／アルミ箔／ポリエチ
レン層の積層体からなる、１項ないし２０項のいずれか
１項に記載された易開封性積層袋。 ２３． 中間層が２軸延伸ナイロン層とアルミ箔層との
積層体からなる、１項ないし２０項のいずれか１項に記
載された易開封性積層袋。 ２４． 中間層がアルミ箔層と２軸延伸ポリエステル層
との積層体からなる、１項ないし２０項のいずれか１項
に記載された易開封性積層袋。 ２５． 内層がエチレン−アクリル酸共重合体層であ
る、１項ないし２４項のいずれか１項に記載された易開
封性積層袋。 ２６． 内層が低密度ポリエチレン層からなる、１項な
いし２４項のいずれか１項に記載された易開封性積層
袋。 ２７． 内層がホモポリプロピレン層からなる、１項な
いし２４項のいずれか１項に記載された易開封性積層
袋。 ２８． 内層の厚みが全層の厚みの２０ないし８０％で
ある、１項ないし２７項のいずれか１項に記載された易
開封性積層袋。 ２９． 積層フイルムの各層間に接着剤を設置した、１
項ないし２８項のいずれか１項に記載された易開封性積
層袋。 ３０． 胴部の開封部に引裂方向の指示を表示した、１
項ないし２９項のいずれか１項に記載された易開封性積
層袋。」に関する。本発明の積層フイルムを構成する各
層は、別途フイルム状に形成して接着層により接着した
積層フイルムのみを意味するのではなく、各構成材料を
別々の層として押し出しラミネート等により積層した状
態に成形したもの等も全て含まれる。要するに各層がフ
イルム状で存在すれば良く製造法に制限はない。According to the present invention, there is provided a composition comprising: (a) the outermost layer is a biaxially stretched polyester resin film layer, a biaxially stretched nylon film layer or a biaxially stretched polyolefin film layer; Are 0.1 ≦ L <0.9 and 0.1 ≦ M <, respectively.
A stretched film satisfying 0.9, 0.2 ≦ N ≦ 0.8, (b) the intermediate layer is a layer containing an aluminum foil, and (c)
The innermost layer is a polyolefin-based resin film layer. The outermost layer of the body of the laminated bag formed of the laminated film has a short linear shape inclined with respect to the tear direction in which the depth is 1/5 or more of the outermost layer film thickness. A score line in which scores are arranged in the tearing direction and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tearing direction are alternately arranged, and a C-shape that widens toward the tearing start portion Easy-opening laminated bag provided with a score line formed by the score of the above. 2. The seal around the torso will start tearing,
2. The easily-openable laminated bag according to item 1, wherein an I-shaped, V-shaped, or U-shaped notch is arranged. 3. 2. The easily-openable laminated bag according to claim 1, wherein a roughened surface portion for starting tearing is provided on an outer layer of the seal portion around the trunk portion. 4. Any one of the items 1 to 3, wherein the score line is arranged on the entire surface of the laminated bag, and the notch or rough surface portion, which is a starting portion for tearing, is arranged on the entire sealing portion of the tearing portion of the bag.
The easy-opening laminated bag described in the paragraph. 5. Any one of paragraphs 1 to 3, wherein a notch or a roughened surface serving as a starting portion for tearing is partially arranged in the tearing portion of the seal portion of the laminated bag, and a starting point of the score line is set near the starting portion. The easy-opening laminated bag according to claim 1. 6. (A) The outermost layer is a biaxially stretched polyester resin film layer, a biaxially stretched nylon film layer or a biaxially stretched polyolefin film layer, and has an orientation coefficient of 0.1 ≦ L <0.9, 0 by a fluorescence orientation method. .1 ≦ M <0.
9, a stretched film satisfying 0.2 ≦ N ≦ 0.8, (b) an intermediate layer is a layer containing an aluminum foil, and (c) an innermost layer is a polyolefin-based resin film layer. A tubular body having a backing portion joined by joining inner layers at both ends in the width direction is formed, the backing portion is brought into close contact with the tubular body, and the upper and lower open ends of the tubular body are joined and the upper and lower ends of the opening are near. The upper and lower ends of the backing part are joined to each other, and the rough surface part consisting of minute irregularities that becomes the starting point of the tear is arranged on the outermost layer of the tear start part of the trunk of the laminated bag, and the outermost layer of the backing part of the laminated bag A score line in which short-line scores inclined with respect to the tear direction are arranged in the tear direction and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tear direction are alternately arranged, and tearing is started. The score formed by the C-shaped score that spreads out toward the part Easy-to-open laminated bag was installed. 7. 7. The easily-openable laminated bag according to item 6, wherein the roughened surface portion composed of fine irregularities is arranged on the outermost layer surface of the folded portion of the film on the back side and the film on the back side of the laminated bag. 8. Item 8. The easy-opening laminated bag according to item 6 or 7, wherein a rough surface portion composed of fine irregularities is arranged on the entire surface of the folded portion of the front film and the back film of the laminated bag. 9. Item 8. The easily-openable laminated bag according to item 6 or 7, wherein a score line in which a C-shaped score is arranged is set on an outer layer film on the front side of the backing portion in close contact with the laminated bag. 10. 10. The easy-opening property described in any one of items 6 to 9, wherein a score line in which C-shaped scores are arranged is also provided on the outer layer film on the surface of the backing portion that is in close contact with the bag, which is in close contact with the laminated bag. Laminated bags. 11. Any one of items 6 to 10, wherein the score line is disposed on the entire outermost layer of the laminated bag, and the roughened surface portion, which is a starting point for tearing, is disposed on the entire folded portion of the front side film and the back side film of the laminated bag. The easy-opening laminated bag described in the paragraph. 12. 6. The item according to any one of items 6 to 10, wherein the rough surface portion, which is a starting portion for tearing, is partially disposed at the folded portion of the front film and the back film of the laminated bag, and the starting point of the score line is disposed near the starting portion. An easily-openable laminated bag according to any one of the preceding claims. 13. A score line in which short-line scores inclined with respect to the tearing direction are arranged in the tearing direction and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tearing direction are arranged in combination one by one. 13. The easily-openable laminated bag according to any one of items 1 to 12. 14． A score line in which a short line score inclined with respect to the tearing direction is arranged in the tearing direction, and a score line in which the short line score inclined in the opposite direction to the score is arranged in the tearing direction is a score line in one inclination direction. 13. The easily-openable laminated bag according to any one of Items 1 to 12, wherein one of the score lines in the opposite inclination direction is sandwiched and arranged in combination. 15. A score line in which a short line score inclined with respect to the tear direction is arranged in the tear direction, and a plurality of score lines in which short line scores inclined in the opposite direction to the score are arranged in the tear direction are alternately arranged. 13. The easily-openable laminated bag according to any one of items 1 to 12. 16. 16. The easily-openable laminated bag according to any one of Items 1 to 15, wherein the score lines are formed in a continuous line. 17． 16. The easily-openable laminated bag according to any one of Items 1 to 15, wherein the score lines are discontinuous and partially arranged in the tearing direction. 18. A score line in which short line scores inclined with respect to the tear direction are arranged in the tear direction, and a score line in which a score line inclined in the opposite direction to the score is arranged in the tear direction is 0.5
1 to 1 alternately installed at intervals of 10 mm to 10 mm
Item 8. The easily-openable laminated bag according to any one of items 7. 19. Item 19. The easily-openable laminated bag according to any one of Items 1 to 18, wherein the inclination angle of the short-line score inclined with respect to the tearing direction is 15 ° to 80 °. 20. The score pitch of the score line in which short-line scores inclined with respect to the tearing direction are arranged is 0.3 mm to 5 mm.
20. The easily-openable laminated bag according to any one of items 1 to 19, wherein 21. 21. The easily-openable laminated bag according to any one of items 1 to 20, wherein the intermediate layer is made of aluminum foil. 22. 21. The easily-openable laminated bag according to any one of items 1 to 20, wherein the intermediate layer comprises a laminate of a polyethylene layer / aluminum foil / a polyethylene layer. 23. 21. The easily-openable laminated bag according to any one of items 1 to 20, wherein the intermediate layer is formed of a laminate of a biaxially stretched nylon layer and an aluminum foil layer. 24. 21. The easy-opening laminated bag according to any one of items 1 to 20, wherein the intermediate layer is formed of a laminate of an aluminum foil layer and a biaxially stretched polyester layer. 25. 25. The easily-openable laminated bag according to any one of items 1 to 24, wherein the inner layer is an ethylene-acrylic acid copolymer layer. 26. 25. The easily-openable laminated bag according to any one of items 1 to 24, wherein the inner layer is formed of a low-density polyethylene layer. 27. 25. The easily-openable laminated bag according to any one of items 1 to 24, wherein the inner layer is formed of a homopolypropylene layer. 28. 28. The easily-openable laminated bag according to any one of items 1 to 27, wherein the thickness of the inner layer is 20 to 80% of the thickness of all layers. 29. An adhesive was placed between each layer of the laminated film,
Item 30. The easily-openable laminated bag according to any one of Items 28 to 28. 30. An indication of the tear direction is displayed on the opening of the torso.
Item 30. The easily-openable laminated bag according to any one of Items 29 to 29. About. Each layer constituting the laminated film of the present invention does not mean only a laminated film formed separately in the form of a film and adhered by an adhesive layer, but formed into a state in which each constituent material is laminated as a separate layer by extrusion lamination or the like. All of the above are also included. In short, the production method is not limited as long as each layer exists in the form of a film.
【０００５】[0005]
【作用】本発明の第１の特徴は袋を形成する特殊な積層
フイルムである。本発明の積層袋の最外層は２軸延伸ポ
リエステル樹脂フイルム層である。ポリエチレンテレフ
タレート樹脂は、耐熱性が良好で熱収縮が小さく、印刷
性が良く、汚れが付着しない等の優れた性能を有してい
るので外層に最適である。また最外層に２軸延伸ナイロ
ンフイルム層を配置しても良い。このナイロン外層積層
袋は耐衝撃性が良好であるので衝撃を受け易い用途に適
している。この他２軸延伸ポリオレフィン層を配置して
も良い。The first feature of the present invention is a special laminated film for forming a bag. The outermost layer of the laminated bag of the present invention is a biaxially stretched polyester resin film layer. Polyethylene terephthalate resin is most suitable for the outer layer because it has excellent heat resistance, small heat shrinkage, good printability, and excellent properties such as no adhesion of dirt. Further, a biaxially stretched nylon film layer may be arranged as the outermost layer. Since this nylon outer layer laminated bag has good impact resistance, it is suitable for applications that are easily subject to impact. In addition, a biaxially stretched polyolefin layer may be provided.
【０００６】中間層にはアルミ箔を含む層を配置する。
アルミ層は酸素バリヤ性が優れているが、その他引裂性
を向上する作用がある。中間層はアルミ箔と樹脂フイル
ム層を組み合わせて構成しても良い。中間層を二軸延伸
ナイロンフイルム層とアルミ箔の積層体で形成すると耐
衝撃性が向上する。また二軸延伸ポリエステルフイルム
層とアルミ箔の積層体で形成するとアルミ箔が延びない
こと、引裂性が良好であることにより引裂伝播性が向上
する。低密度ポリエチレンフイルム層／アルミ箔／低密
度ポリエチレンフイルム層の積層体とすると、ラミネー
ションで低密度ポリエチレンが接着層となり生産性が良
好となる。[0006] A layer containing an aluminum foil is disposed as the intermediate layer.
The aluminum layer has an excellent oxygen barrier property, but also has an effect of improving tearability. The intermediate layer may be formed by combining an aluminum foil and a resin film layer. When the intermediate layer is formed of a laminate of a biaxially stretched nylon film layer and an aluminum foil, the impact resistance is improved. Further, when formed of a laminate of a biaxially stretched polyester film layer and an aluminum foil, the aluminum foil does not extend, and the good tearability improves the tear propagation. When a laminate of a low-density polyethylene film layer / aluminum foil / a low-density polyethylene film layer is used, the low-density polyethylene becomes an adhesive layer by lamination, and the productivity is improved.
【０００７】中間層にナイロンフイルム層とアルミ箔の
積層体を用いた場合はナイロンフイルム層はアルミ箔と
最外層との間に配置することが好ましい。中間層のナイ
ロンフイルム層をアルミ箔と最内層フイルム層の間に配
置することも出来るが、ナイロンは吸水性があるので被
包装物がトマトケチヤップ等のようにｐＨが低い場合ア
ルミ箔を侵蝕する傾向があり、またアルミ箔とナイロン
層の間にフクレを生じることがある。一方ポリエステル
フイルム層は透水性がなくアルミ箔を保護する作用があ
るので、トマト、オレンジ等のｐＨの低い物にはアルミ
箔の内層側にポリエステルフイルム層を配置することが
好ましい。When a laminate of a nylon film layer and an aluminum foil is used for the intermediate layer, the nylon film layer is preferably disposed between the aluminum foil and the outermost layer. The intermediate nylon film layer can be placed between the aluminum foil and the innermost film layer.However, nylon has a water absorption property, so if the wrapped material has a low pH, such as tomato ketchup, it will attack the aluminum foil. And may cause blisters between the aluminum foil and the nylon layer. On the other hand, since the polyester film layer has no water permeability and has an action of protecting the aluminum foil, it is preferable to arrange the polyester film layer on the inner layer side of the aluminum foil for low pH materials such as tomato and orange.
【０００８】最内層をポリオレフィン系樹脂フイルム層
とするのは、ヒートシール性が良く、食品等の被包装物
と接触しても毒性がなく安全であるからである。最内層
のポリオレフィン系樹脂としては、ホモポリプロピレ
ン、低密度ポリエチレン、エチレン−アクリル酸共重合
体、エチレン−メタアクリル酸共重合体が用いられる。
ポリオレフィン系樹脂フイルム層は引裂方向性を付与す
る作用がある。最内層のポリオレイフィン系樹脂フイル
ム層は５０μｍ以下の厚みであり、抗張力が７００ｇ／
ｃｍ２以下であることが好ましい。この条件を満さない
と耐衝撃強度や、引裂時の袋の表裏のズレが大きくな
る。また最内層の厚みは積層フイルムの全厚みの２０〜
８０％であることが好ましい。なお本発明の食品包装用
積層袋は最外層がポリエステル樹脂フイルム層、ナイロ
ンフイルム層、またはポリオレフィン系樹脂フイルム層
であり、最内層がポリオレフィン系樹脂フイルム層、中
間層がアルミ箔を含む層の三層を基本とする。The reason why the innermost layer is a polyolefin resin film layer is that it has good heat sealing properties and is safe without any toxicity even when it comes into contact with a packaged object such as food. As the polyolefin resin in the innermost layer, homopolypropylene, low-density polyethylene, ethylene-acrylic acid copolymer, and ethylene-methacrylic acid copolymer are used.
The polyolefin-based resin film layer has an action of imparting tear directionality. The innermost polyolefin resin film layer has a thickness of 50 μm or less, and has a tensile strength of 700 g /
cm 2 or less. If this condition is not satisfied, the impact strength and the gap between the front and back of the bag at the time of tearing will increase. The thickness of the innermost layer is from 20 to the total thickness of the laminated film.
Preferably it is 80%. In the laminated bag for food packaging of the present invention, the outermost layer is a polyester resin film layer, a nylon film layer, or a polyolefin resin film layer, the innermost layer is a polyolefin resin film layer, and the intermediate layer is a layer containing aluminum foil. Layer based.
【０００９】本発明の最外層の２軸延伸ポリエステルフ
イルム層と２軸延伸ナイロンフイルム層と２軸延伸ポリ
オレフィンフイルム層は蛍光配向法による配向係数が
０．１≦Ｌ＜０．９、０．１≦Ｍ＜０．９、０．２≦Ｎ
≦０．８である層でなければならない。この範囲内の配
向係数のフイルム層であると開封時の引裂方向のずれを
防止する作用がある。積層フイルムの各層間にはウレタ
ン系等の接着剤層が配置されるが、前述のようにラミネ
ーションで積層フイルムを形成する場合は中間層のアル
ミニウム箔と内層フイルムの間および中間層のアルミニ
ウム箔と外層フイルムの間に低密度ポリエチレン（以下
ＬＤＰＥという）層を配置し、このＬＤＰＥを押出時に
溶融して接着層とすることも出来る。The biaxially oriented polyester film layer, biaxially oriented nylon film layer and biaxially oriented polyolefin film layer of the outermost layers of the present invention have an orientation coefficient of 0.1 ≦ L <0.9, 0.1 by a fluorescent orientation method. ≦ M <0.9, 0.2 ≦ N
The layer must be ≦ 0.8. A film layer having an orientation coefficient within this range has an effect of preventing a shift in the tear direction at the time of opening. An adhesive layer of urethane or the like is disposed between the layers of the laminated film.When the laminated film is formed by lamination as described above, the adhesive layer is formed between the intermediate layer aluminum foil and the inner layer film and the intermediate layer aluminum foil. A low-density polyethylene (hereinafter, referred to as LDPE) layer may be disposed between the outer films, and this LDPE may be melted during extrusion to form an adhesive layer.
【００１０】本発明の第２の特徴は最外層のフイルム層
に設けたスコア線である。本発明は、袋胴部の引裂位置
に引裂方向に対して傾斜した短線状のスコアを引裂方向
に配列したスコア線と、該スコアと逆方向に傾斜した短
線状のスコアを引裂方向に配列したスコア線とを交互に
配置し、引裂開始部に向って末広がりになるハの字形の
スコアにより形成されるスコア線を設置する。このよう
な引裂方向に対し傾斜した短線状のスコアを配列したス
コア線と、このスコア線と逆方向に傾斜したスコアより
なるスコア線を交互に配置した１組のスコア線により引
裂開始部に向って末広がりとなるハの字形のスコア線が
形成されるが、もう一本の傾斜方向が逆のスコア線から
なるスコア線を組み合わせると逆方向の引裂開始部に向
って末広がりのハの字のスコア線が形成される。このよ
うにスコア線を最小３本設置するとどちらの方向からも
容易に開封できる積層袋とすることが出来る。勿論、こ
のように引裂方向に対する傾斜方向の異なるスコアを配
列したスコア線を交互に３本以上設置しても良いが、傾
斜が同一方向のスコアからなるスコア線を隣り合わせて
設置してもそこに形成される斜め平行形のスコア線は引
裂方向を制御する作用がほとんどない。しかしながらハ
の字形スコア線の間に斜め平行形スコア線が多少混在し
ても引裂はハの字形スコア線により制御されるので障害
は小さい。A second feature of the present invention is a score line provided on the outermost film layer. The present invention arranges a score line in which a short-line score inclined with respect to the tear direction is arranged in the tear direction at a tear position of the bag body, and a short-line score inclined in the opposite direction to the score is arranged in the tear direction. Score lines are alternately arranged, and a score line formed by a C-shaped score that spreads out toward the tear start portion is provided. A score line in which short-line scores that are inclined with respect to the tear direction are arranged and a score line that is composed of scores that are inclined in the opposite direction to the score line are alternately arranged to reach the tear initiation portion. A score-shaped score line is formed that spreads out, but when another score line consisting of a score line with the opposite inclination direction is combined, the score of the spread-out cross-shape toward the tearing start point in the opposite direction is formed. A line is formed. By installing a minimum of three score lines in this way, a laminated bag that can be easily opened from either direction can be obtained. Of course, three or more score lines in which scores having different inclination directions with respect to the tear direction may be arranged alternately as described above. The formed oblique parallel score lines have little effect on controlling the tear direction. However, even if some oblique parallel score lines are mixed between the C-shaped score lines, the tear is controlled by the C-shaped score lines, so that the obstacle is small.
【００１１】何故引裂開始部に向って末広となるハの字
形スコアにより形成されるスコア線が引裂を制御するの
かについてその学問的解明は未だ必ずしも明らかでない
が、本発明者は反復再現する作用から、引裂力のベクト
ルがハの字により１８０°方向に規制されるためと考え
ている。スコア線は連続した線状でも良く、長い距離で
なければ不連続部分が存在してもよい。さらにスコア線
は袋の全面に配置されていてもよく、引裂部に相当する
部位にのみ配置してもよい。傾斜した短線状のスコアの
長さは０．３〜０．７ｍｍであり、好適には０．４〜
０．６ｍｍ、特に０．５ｍｍ近傍が最も好ましい。スコ
アの傾斜は１５〜８０°であり、スコアのピッチは０．
３〜３ｍｍである。またスコア線とスコア線の間隔は
０．５〜１０ｍｍであり、スコアの深さは積層フイルム
の外層の１／５以上である。スコア線がこれ等の条件を
満さないと開封時に引裂の伝播性が劣化し、さらにはス
コア線以外の所で引き裂かれたりして表裏のズレを生ず
る。またスコアが中間層や内層にまで及ぶと取扱中の落
下等により破損したり、スコアが内部に貫通する危険が
大きい。このように本発明のハの字形スコアは引裂開始
部に向って末広がりのハの字形である。開封時に引裂の
取っ掛かりとなるノッチや粗面を引裂の起点に形成する
と易開封効果がある。スコアのピッチはハの字の下端と
次のハの字の上端の距離であり、スコア線の間隔はハの
字の下端と、対向する逆ハの字の上端の夫々に引いた垂
線の距離である。[0011] It is not always clear yet why the score line formed by the C-shaped score that diverges toward the tear initiation part controls the tear, but the present inventor has determined from the effect of repetitive reproduction. The reason is that the vector of the tearing force is regulated in the 180 ° direction by the C-shape. The score line may be a continuous line, or a discontinuous portion may exist if the score line is not long. Further, the score line may be arranged on the entire surface of the bag, or may be arranged only on a portion corresponding to the tearing portion. The length of the inclined short linear score is 0.3-0.7 mm, preferably 0.4-0.7 mm.
0.6 mm, most preferably around 0.5 mm. The slope of the score is 15-80 °, and the pitch of the score is 0.
3 to 3 mm. The interval between the score lines is 0.5 to 10 mm, and the depth of the score is 1/5 or more of the outer layer of the laminated film. If the score line does not satisfy these conditions, the tear propagation property will be degraded at the time of opening, and furthermore, it will be torn apart from the score line, resulting in misalignment between the front and back. Further, when the score reaches the middle layer or the inner layer, there is a great risk that the score may be damaged due to a drop during handling or the score may penetrate inside. Thus, the C-shaped score of the present invention is a C-shaped divergence diverging toward the tear start portion. Forming a notch or rough surface at the start of tearing, which is a starting point for tearing at the time of opening, has an easy opening effect. The pitch of the score is the distance between the lower end of the letter "C" and the upper end of the next letter "C", and the interval between the score lines is the distance between the lower end of the letter "C" and the perpendicular drawn at the upper end of the opposite inverted letter "C". It is.
【００１２】このように不連続の傾斜した短線状のスコ
アを並べてスコア線を形成したのは、連続した直線もし
くは曲線のスコア線は引裂方向の規制力が小さいからで
ある。スコアとスコアのピッチが０．３ｍｍ以下では形
成されるスコアが連続のスコア線に近くなるため規制力
が小さくなり、３ｍｍ以上では引裂の伝播が不良とな
る。そしてハの字形のスコアの配列と逆ハの字形スコア
の配列と組み合わせると引裂の表裏のずれは非常に小さ
くなる。そしてこの２種のスコアを配列したスコア線を
組み合わせる引裂開始部に対してハの字の末広が逆とな
るスコア線を設置することにより袋を右側から引き裂く
ことも、左側から引き裂くことも自由に出来る利点があ
る。ハの字のスコアと逆ハの字のスコアによる１組のス
コア線の間隔が０．５ｍｍ以下では１組として用いるず
れ防止効果が小さくなり、１０ｍｍ以上ではずれ防止効
果が不良となる。この正逆方向を組み合わせたスコア線
は１組でもよく、必要に応じて２組以上設けてもよい。
３本以上の奇数本で配置する場合は方向の異なるハの字
のスコアは同方向のハの字のスコアの間に配置されるこ
とになる。The score lines are formed by arranging the discontinuous inclined short-line scores in this manner because a continuous straight line or a curved score line has a small regulating force in the tearing direction. When the score and the pitch of the score are 0.3 mm or less, the formed score is close to a continuous score line, so that the regulating force is small. When the score is 3 mm or more, the propagation of the tear is poor. When combined with the arrangement of the C-shaped scores and the arrangement of the inverted C-shaped scores, the deviation between the front and back of the tear becomes extremely small. The score line where the two types of scores are arranged and the score line where the divergence of the U-shape is opposite to the tear start portion is set, so that the bag can be torn from the right side or from the left side freely. There are advantages that can be done. If the interval between a pair of score lines based on the score of the squares and the score of the inverted squares is 0.5 mm or less, the shift prevention effect used as one set becomes small, and if it is 10 mm or more, the shift prevention effect becomes poor. One set of score lines combining the forward and reverse directions may be provided, or two or more sets may be provided as necessary.
When three or more odd numbers are arranged, the score of the C in different directions is arranged between the scores of the C in the same direction.
【００１３】引裂を容易とするため積層袋のシール部に
はスコア線の起点近傍に引裂の取っ掛かりとなるＩノッ
チ、ＶノッチあるいはＵノッチ等のノッチを配設するこ
とが好ましい。この他シール部の外層フイルムに凹凸を
形成した粗面部を設けることも有効である。To facilitate tearing, it is preferable to provide a notch such as an I notch, a V notch, or a U notch near the starting point of the score line in the seal portion of the laminated bag. In addition, it is also effective to provide a roughened surface portion having irregularities on the outer layer film of the seal portion.
【００１４】本発明の第３の特徴は、背張した袋にも適
用出来ることである。背張袋は製作が容易であるので広
く用いられているが、背張部が２倍の膜厚となること、
通常背張部にはスコアを設けないこと、特に袋に密着し
た裏面はスコアの配設が行われないことなどのため、開
封時に引裂抵抗が大きく、引裂の伝播性が良好でないの
で易開封性とならない欠点があった。本発明はこのよう
な問題を特殊なスコア線を配置することにより解決し
た。背張袋の袋胴部の引裂位置に引裂方向に対して傾斜
した短線状のスコアを引裂方向に配列したスコア線と、
該スコアと逆方向に傾斜した短線状のスコアを引裂方向
に配列したスコア線とを交互に配置し、引裂開始部に向
って末広がりになるハの字形のスコアにより形成される
スコア線を設置する。このような引裂方向に対し傾斜し
た短線状のスコアを配列したスコア線と、このスコア線
と逆方向に傾斜したスコアよりなるスコア線を交互に配
置した１組のスコア線により引裂開始部に向って末広が
りとなるハの字形のスコア線が形成されるが、もう一本
の傾斜方向が逆のスコア線からなるスコア線を組み合わ
せると逆方向の引裂開始部に向って末広がりのハの字の
スコア線が形成される。このようにスコア線を最小３本
設置するとどちらの方向からも容易に開封できる袋とす
ることが出来る。そして、ハの字形のスコア線を背張部
の上面、つまり背張部を折り曲げて袋本体に密着させた
面の反対面にも配設する。[0014] A third feature of the present invention is that the present invention can be applied to a bag which is overstretched. The lining bag is widely used because it is easy to manufacture, but the lining part has twice the thickness,
Normally, no score is provided on the backing part, especially since the score is not provided on the back surface that is in close contact with the bag, so tear resistance is large at opening and tear propagation is not good, so easy opening There was a disadvantage that did not become. The present invention has solved such a problem by arranging a special score line. A score line arranged in the tearing direction with a short-line score inclined with respect to the tearing direction at the tearing position of the bag body of the backing bag,
The score and a score line in which short-line scores inclined in the opposite direction are arranged in the tearing direction are alternately arranged, and a score line formed by a C-shaped score that spreads toward the tearing start portion is provided. . A score line in which short-line scores that are inclined with respect to the tear direction are arranged and a score line that is composed of scores that are inclined in the opposite direction to the score line are alternately arranged to reach the tear initiation portion. A score-shaped score line is formed that spreads out, but when another score line consisting of a score line with the opposite inclination direction is combined, the score of the spread-out cross-shape toward the tearing start point in the opposite direction is formed. A line is formed. By installing a minimum of three score lines in this way, a bag that can be easily opened from either direction can be obtained. Then, the C-shaped score line is also provided on the upper surface of the backing portion, that is, on the surface opposite to the surface where the backing portion is bent and brought into close contact with the bag body.
【００１５】また背張袋の表面側から裏面側に折り曲げ
る折れ曲り部には開封の取っ掛かりとなる粗面部を配設
するのである。通常の四方シール袋では開封の取っ掛か
りとなるＩノッチ、Ｖノッチ、Ｕノッチ等のノッチをシ
ール部に配設するが背張袋では開封の起点となる胴部の
フイルム折れ曲り部にはシール部がないのでノッチを設
けることが出来ない。したがって取っ掛かりとなる粗面
部を設けるがこのような粗面部は砥石、サンドペーパー
加工等により容易に形成することが出来る。粗面部は深
さは最外層フイルムの厚みの範囲であれば良く、巾は５
０μｍ以下の凹凸により形成される。この粗面部により
背張袋は容易に引き裂くことが出来る。ハの字形のスコ
ア線は袋の全面に設けても良く、開封する部分にだけ設
けても良い。また背張部の全面に設けても良く、引き裂
く箇所にだけ設けても良い。背張部の袋と密着する面に
もスコア線を配設すると逆方向からの開封が容易とな
る。スコア線は連続した線でも、不連続の線でも良いが
不連続の場合は，不連続部は３ｃｍ〜１０ｃｍの感覚で
配置することが好ましい。これより長いと引裂の伝播が
不良となる。スコア線は袋の全面もしくは引裂方向の全
領域に配置するのが易開封性の面から好ましいが、袋の
外観が変化することと、加工上の点から部分的に配置す
ることも有効である。袋を形成する積層フイルムが特殊
な引裂伝播性の優れたフイルムであるのでスコアがなく
ても引裂は伝播するが引裂進行中に多少のズレが発生し
たときハの字型スコアが所々にあると、これによりズレ
が補正される効果がある。本発明の易開封性積層袋は末
広がりのハの字形スコアを配列したスコア線と逆方向に
末広のハの字形スコアを配列したスコア線を組み合わせ
ると左右どちら側からも引き裂くことが出来るが、スコ
ア線を２本配置した場合は一方の方向からの引裂が良好
となるので引裂方向を示す表示を付しておくとスコアの
形をみて引き裂く必要がない。[0015] Further, a rough surface portion for starting opening is provided in a bent portion which is bent from the front side to the back side of the backing bag. Notches such as I-notch, V-notch, and U-notch, which can be used for opening the normal four-sided seal bag, are provided on the seal portion. Since there is no part, a notch cannot be provided. Therefore, a rough surface portion is provided as a starting point, but such a rough surface portion can be easily formed by a grindstone, sandpaper processing or the like. The rough surface may have a depth within the range of the thickness of the outermost film, and a width of 5.
It is formed by unevenness of 0 μm or less. With this roughened surface, the backing bag can be easily torn. The C-shaped score line may be provided on the entire surface of the bag, or may be provided only on the portion to be opened. Further, it may be provided on the entire surface of the backing portion, or may be provided only at a tearing portion. If a score line is also provided on the surface of the backing portion that is in close contact with the bag, opening from the opposite direction becomes easier. The score line may be a continuous line or a discontinuous line, but in the case of discontinuity, it is preferable to arrange the discontinuous portion with a feeling of 3 cm to 10 cm. Longer lengths result in poor tear propagation. It is preferable to arrange the score line on the entire surface of the bag or on the entire region in the tearing direction from the viewpoint of easy opening, but it is also effective to partially arrange the bag from the viewpoint of changing the appearance of the bag and processing. . The laminated film that forms the bag is a special film with excellent tear propagation properties, so even if there is no score, the tear propagates, but if there is some misalignment during the progress of the tear, there is a C-shaped score in some places This has the effect of correcting the deviation. The easy-opening laminated bag of the present invention can be torn from either the left or right side by combining the score line in which the divergent C-shaped scores are arranged and the score line in which the divergent C-shaped scores are arranged in the opposite direction. When two lines are arranged, the tearing from one direction is good. If a display indicating the tearing direction is given, it is not necessary to tear the score in view of the shape of the score.
【００１６】積層フイルムの代表的構成は、 １２μｍＰＥＴ／７μｍＡｌ／７０μｍＰＰ １２μＰＥＴ／７μＡｌ／５０μＬＤＰＥ １２μＰＥＴ／７μＡｌ／５０μＥＡＡ １２μＰＥＴ／１５μＬＤＰＥ／７μＡｌ／１５μＬＤ
ＰＥ／３０μＥＡＡ １２μＰＥＴ／１５μＮｙ／７μＡｌ／５０μＰＰ １２μＰＥＴ／７μＡｌ／１２μＰＥＴ／５０μＰＰ １２μＰＥＴ／７μＡｌ／５０μＥＭＡ 等である。なお、ＰＥＴはポリエチレンテレフタレート
フイルム層、Ａｌはアルミ箔、ＰＰはホモポリプロピレ
ン層、Ｎｙはナイロン層、ＥＡＡはエチレン・アクリル
酸共重合体層、ＥＭＡはエチレン・メタアクリル酸共重
合体層、ＬＤＰＥは低密度ポリエチレン層を示す。A typical configuration of the laminated film is 12 μm PET / 7 μm Al / 70 μm PP 12 μPET / 7 μAl / 50 μLDPE 12 μPET / 7 μAl / 50 μEAA 12 μPET / 15 μLDPE / 7 μAl / 15 μLD
PE / 30 μEAA 12 μPET / 15 μNy / 7 μAl / 50 μPP 12 μPET / 7 μAl / 12 μPET / 50 μPP 12 μPET / 7 μAl / 50 μEMA and the like. In addition, PET is a polyethylene terephthalate film layer, Al is an aluminum foil, PP is a homopolypropylene layer, Ny is a nylon layer, EAA is an ethylene / acrylic acid copolymer layer, EMA is an ethylene / methacrylic acid copolymer layer, and LDPE is 4 shows a low density polyethylene layer.
【００１７】[0017]
【実施例】次に実施例をあげて本発明を具体的に説明す
るがまず図面について具体的に説明する。図１は本発明
の一つの実施例である積層袋の正面を示し、１はシール
部である。したがってこの袋は四方をシールした袋であ
る。２は引裂方向に対して傾斜した短線状のスコアであ
る。３は逆方向に傾斜した短線状のスコアであり、この
２種のスコアが配列されたスコアの配列４、５、６、７
が交互に配置されてハの字形のスコアが配列されたスコ
ア線８、９、１０が形成される。この例では４本のスコ
アの配列により３本のスコア線が形成されている。８、
１０は左から右への引裂方向に末広がりのハの字形のス
コア配列したスコア線であり、９は逆方向のスコア線で
ある。したがってこの積層袋はどちらの方向からも開封
することが出来る。この例では引き裂く部分に不達続状
でスコア線が設けられている。１１は開封の取っ掛かり
となるノッチであって、Ｉノッチ、Ｖノッチ、Ｕノッチ
のいずれも使用出来る。シール部１には開封の取っ掛か
りとなる粗面部１２が設けられているがノッチと併用し
ても良く、一方のみでも良い。Next, the present invention will be described in detail with reference to examples. FIG. 1 is a front view of a laminated bag according to one embodiment of the present invention, and 1 is a seal portion. Therefore, this bag is a bag sealed on all sides. 2 is a short-line score inclined with respect to the tearing direction. Reference numeral 3 denotes a short-line-shaped score inclined in the reverse direction, and a score array 4, 5, 6, or 7 in which these two types of scores are arranged.
Are alternately arranged to form score lines 8, 9, and 10 in which C-shaped scores are arranged. In this example, three score lines are formed by an array of four scores. 8,
Numeral 10 denotes a score line in which scores are arranged in a C-shape diverging in the tearing direction from left to right, and 9 is a score line in the reverse direction. Therefore, the laminated bag can be opened from either direction. In this example, a score line is provided in an unreachable manner at the torn portion. Reference numeral 11 denotes a notch for starting opening, and any of an I notch, a V notch, and a U notch can be used. The seal portion 1 is provided with a rough surface portion 12 for starting opening, but may be used together with a notch or only one of them.
【００１８】図２は他の実施例であって積層袋はフイル
ムの巾方向の両端部を折り曲げて内層部分を合せてシー
ルした背張部１３を形成し、上下端をシールしたシール
部１を有する背張袋である。この背張袋の表側から裏側
にフイルムを折り曲げた部分１４には開封の取っ掛かり
となる粗面部１２が設けられている。粗面部は折曲部全
体に設けても良い。背張部と袋の本体には図１に示した
ものと同一のハの字形スコア線が設置されている。この
例では背張部の表側にスコア線を配置したが袋本体の全
面に設けても良い。スコア線を背張部の裏側つまり袋に
密着した面にも設けると逆方向からの引裂が容易に出来
る利点がある。最外層、中間層、最内層の層間には接着
層を配置することが好ましい。FIG. 2 shows another embodiment, in which a laminated bag is formed by bending both ends in the width direction of a film to form a backing portion 13 in which inner layers are sealed together, and a sealing portion 1 in which upper and lower ends are sealed. It is a backing bag having. A portion 14 of the backing bag where the film is bent from the front side to the back side is provided with a roughened surface portion 12 for starting opening. The rough surface portion may be provided on the entire bent portion. The same C-shaped score line as that shown in FIG. 1 is provided on the backrest and the body of the bag. In this example, the score lines are arranged on the front side of the backrest, but they may be arranged on the entire surface of the bag body. If the score line is also provided on the back side of the backrest, that is, on the surface in close contact with the bag, there is an advantage that tearing from the opposite direction can be easily performed. It is preferable to arrange an adhesive layer between the outermost layer, the intermediate layer, and the innermost layer.
【００１９】実施例１ 厚さ１２μｍのポリエステルフイルム、厚さ７μｍのア
ルミ箔、厚さ５０μｍの低密度ポリエチレンフイルムの
各層間にウレタン樹脂系接着剤層を設置した３層積層シ
ートをポリエチレン樹脂フイルム層を合わせて重ね、三
辺をヒートシールして縦１７０ｍｍ横１３０ｍｍの袋と
した。内面を形成するポリエチレン樹脂フイルム層は、
低密度ポリエチレンフイルム層であって厚みは５０μｍ
である。フイルムの配向度は表１の通りである。袋胴部
および胴部の折れ部の積層フイルムには深さが５μｍ、
長さ〜〜ｍｍの、引裂方向に対し２５°傾斜した短線状
のスコアをピッチ１．５で配列したスコア配列と、同じ
深さと同じ長さのスコアで反対方向に傾斜した同ピッチ
で配列したスコア配列を交互に２．０ｍｍ間隔で配置し
た図１に示すように不連続状のスコア線を配置した。シ
ール部にはＩノッチを配置した。ハの字形スコアは径２
０μｍであり、またスコアのメッシュ、すなわち１イン
チ当りの個数は１２０である。EXAMPLE 1 A three-layer laminated sheet having a urethane resin-based adhesive layer interposed between each layer of a polyester film having a thickness of 12 μm, an aluminum foil having a thickness of 7 μm, and a low-density polyethylene film having a thickness of 50 μm was used as a polyethylene resin film layer. And the three sides were heat-sealed to form a bag having a length of 170 mm and a width of 130 mm. The polyethylene resin film layer forming the inner surface is
Low-density polyethylene film layer with a thickness of 50 μm
It is. Table 1 shows the degree of orientation of the film. The depth of the laminated film of the bag body and the folded part of the body is 5 μm,
A score array in which short-line scores having a length of ~ mm and inclined at 25 ° to the tearing direction were arranged at a pitch of 1.5 and arranged at the same pitch having the same depth and the same length as a score having the same length and inclined in the opposite direction. As shown in FIG. 1 in which score arrays were alternately arranged at 2.0 mm intervals, discontinuous score lines were arranged. An I notch was arranged in the seal portion. C-shaped score is diameter 2
The mesh of the score is 120 μm, that is, the number of meshes per inch is 120 μm.
【００２０】実施例２ 実施例２はラミネート構造を表１に示すように変えて背
張り部を設けた袋とし、袋の折り曲り部には縦方向に微
小の粗面部を形成し背張り部の胴部に密着している表面
層に実施例１と同様のスコア線を縦方向に形成した積層
袋とした。 実施例３〜５ ラミネート構成を表１に示すように変えた以外は実施例
１と同様にして積層袋とした。Example 2 In Example 2, the laminated structure was changed as shown in Table 1 to form a bag provided with a backing portion, and a minute rough surface portion was formed in the bent portion of the bag in the vertical direction to form a backing portion. In the laminated bag, the same score line as in Example 1 was formed in the surface layer in close contact with the body portion of Example 1. Examples 3 to 5 Laminated bags were made in the same manner as in Example 1 except that the laminate configuration was changed as shown in Table 1.
【００２１】比較例１〜７ ラミネート構成を表１に示す通りとし、他は実施例１と
同様にして積層袋とした。 スコア線の数 実施例１、３、４、５は２本、実施例２は１本である。
比較例１、３、４、５、６、７は４本、比較例２は２本
である。 性能試験 袋に１８０ｇの水／油懸濁液を充填後密封し、袋中の品
温を室温（２０℃）に保ち、１００袋について開封試験
を行った。結果を表１に示す。Comparative Examples 1 to 7 The laminated structure was as shown in Table 1, and the other conditions were the same as in Example 1 to form a laminated bag. Number of score lines Examples 1, 3, 4, and 5 have two lines, and Example 2 has one line.
Comparative Examples 1, 3, 4, 5, 6, and 7 have four, and Comparative Example 2 has two. Performance test A bag was filled with 180 g of a water / oil suspension and sealed, and the bag was kept at room temperature (20 ° C.), and 100 bags were opened. Table 1 shows the results.
【００２２】[0022]
【表１】 [Table 1]
【００２３】（註） ブロックＰＰ：エチレン−プロピレンブロック共重合体
（ＭＩ＝２．０） ホモＰＰ：ホモポリプロピレン（ＭＩ＝１．０） ＨＤＰＥ：高密度ポリエチレン（ｄ＝０．９５０） Ｎｙ：２軸延伸ナイロン６ ＰＥＴ；２軸延伸ポリエチレンテレフタレート ＬＤＰＥ：低密度ポリエチレン ＥＡＡ：エチレン・アクリル酸共重合体 開封力：○ 抵抗なく開封出来た △ 抵抗があるが開封は可能 × 開封困難 袋表裏一致性：○ 全くずれがない。 △ ずれがあるが１０ｍｍ以下 × ずれ量１０ｍｍ以上 表中包材の欄の＊印の構成フイルムはフイルム配向度の
欄のフイルム配向度である。Ｎｏ．１〜５は実施例１〜
５であり、Ｎｏ．６〜１１は比較例１〜６である。 （評価） Ｎｏ．６；延伸されていないフイルムにスコアをいれ
た。開封の伝播性悪い。 Ｎｏ．７；アルミ箔が積層されていない。開封の伝播性
悪い。 Ｎｏ．８；ＰＰの抗張力：８００ｇ／ｃｍ２で大きいた
め開封性表裏一致性がやや劣化した。 Ｎｏ．９；スコアの深さが所定の深さに達していない。
開封性悪い。 Ｎｏ．１０；「ハ」の字形スコア加工が施されていな
い。表裏一致しない。 Ｎｏ．１１；スコアが入っていないので表裏一致性悪
い。(Note) Block PP: ethylene-propylene block copolymer (MI = 2.0) Homo PP: homopolypropylene (MI = 1.0) HDPE: high-density polyethylene (d = 0.950) Ny: 2 Axial stretched nylon 6 PET; biaxially stretched polyethylene terephthalate LDPE: low-density polyethylene EAA: ethylene / acrylic acid copolymer Opening force: ○ Opened without resistance △ Opening is possible with resistance × Difficult to open ○ There is no deviation. Δ There is a shift, but 10 mm or less. X Amount of shift, 10 mm or more. The film composition indicated by * in the column of packaging material in the table is the film orientation degree in the film orientation degree column. No. 1 to 5 are Examples 1 to
No. 5; Nos. 6 to 11 are Comparative Examples 1 to 6. (Evaluation) 6: A score was given to the unstretched film. Poor propagation of opening. No. 7; No aluminum foil is laminated. Poor propagation of opening. No. 8; PP tensile strength: 800 g / cm 2, which was large, and the open / close consistency was slightly deteriorated. No. 9: The depth of the score has not reached the predetermined depth.
Poor openability. No. 10; "C" shaped score processing is not performed. They do not match. No. 11: Poor front-to-back consistency because no score is entered.
【００２４】[0024]
【発明の効果】本発明は開封性が良好で、表裏の引裂ず
れがほとんど発生せず引裂の伝播性も優れている効果を
奏する。The present invention has an effect that the opening property is good, the tearing between the front and back is hardly generated, and the tear propagation property is excellent.
【図１】本発明実施例である易開封性積層袋の平面図で
ある。FIG. 1 is a plan view of an easily-openable laminated bag according to an embodiment of the present invention.
【図２】他の実施例である易開封性積層袋の平面図であ
る。FIG. 2 is a plan view of an easily-openable laminated bag according to another embodiment.
１ シール部 ２ 傾斜した短線状のスコア ３ 反対方向に傾斜した短線状のスコア ４ スコアの配列 ５ スコアの配列 ６ スコアの配列 ７ スコアの配列 ８ ハの字形スコアによるスコア線 ９ 逆方向に末広のハの字形によるスコア線 １０ ハの字形スコアによるスコア線 １１ ノッチ １２ 粗面 １３ 背張部 １４ 折り曲げ部 DESCRIPTION OF SYMBOLS 1 Seal part 2 Inclined short-line score 3 Short-lined score inclined in the opposite direction 4 Score arrangement 5 Score arrangement 6 Score arrangement 7 Score arrangement 8 Score line by C-shaped score 9 Reverse divergent Score line by C-shape 10 Score line by C-shape score 11 Notch 12 Rough surface 13 Span portion 14 Bent portion
Claims (30)
脂フイルム層、２軸延伸ナイロンフイルム層または２軸
延伸ポリオレフインフイルム層であって、蛍光配向法に
よる配向係数がそれぞれ０．１≦Ｌ＜０．９、０．１≦
Ｍ＜０．９、０．２≦Ｎ≦０．８を満足する延伸フイル
ムであり、（ｂ）中間層はアルミ箔を含む層であり、
（ｃ）最内層はポリオレフィン系樹脂フイルム層であ
る、積層フイルムで形成した積層袋の胴部の最外層に、
深さが最外層フイルム厚みの１／５以上である引裂方向
に対して傾斜した短線状のスコアを引裂方向に配列した
スコア線と、該スコアと逆方向に傾斜した短線状のスコ
アを引裂方向に配列したスコア線とを交互に配置し、引
裂開始部に向って末広がりになるハの字形のスコアによ
り形成されるスコア線を設置した易開封性積層袋。(A) The outermost layer is a biaxially stretched polyester resin film layer, a biaxially stretched nylon film layer or a biaxially stretched polyolefin film layer, and each has an orientation coefficient of 0.1 ≦ L <by a fluorescence orientation method. 0.9, 0.1 ≦
A stretched film satisfying M <0.9, 0.2 ≦ N ≦ 0.8, and (b) the intermediate layer is a layer containing an aluminum foil;
(C) the innermost layer is a polyolefin-based resin film layer, the outermost layer of the body of the laminated bag formed of the laminated film,
A score line in which short-line scores inclined with respect to the tear direction having a depth of 1/5 or more of the thickness of the outermost film is arranged in the tear direction, and a short-line score inclined in the opposite direction to the score is indicated by the tear direction. And the score lines arranged alternately, and a score line formed by a C-shaped score diverging toward the tear start portion is provided.
となる、Ｉ字形またはＶ字形あるいはＵ字形のノッチを
配置した、請求項１に記載された易開封性積層袋。2. The easily-openable laminated bag according to claim 1, wherein an I-shaped, V-shaped, or U-shaped notch, which serves as a starting point for tearing, is arranged in a seal portion around the body.
掛かりとなる粗面部を設けた、請求項１に記載された易
開封性積層袋。3. The easy-opening laminated bag according to claim 1, wherein a rough surface portion serving as a starting point for tearing is provided on an outer layer of the seal portion around the trunk portion.
裂の取っ掛かり部であるノッチまたは粗面部が該袋の引
裂部のシール部全面に配置された、請求項１ないし３の
いずれか１項に記載された易開封性積層袋。4. The score line according to claim 1, wherein a score line is arranged on the entire surface of the laminated bag, and a notch or a rough surface portion, which is a starting portion for tearing, is arranged on the entire seal portion of the tear portion of the bag. The easy-opening laminated bag according to claim 1.
粗面部を積層袋のシール部の引裂部に部分的に配置し、
スコア線の始点がこの取っ掛かり部近傍に設置された、
請求項１ないし３のいずれか１項に記載された易開封性
積層袋。5. A notch or a roughened surface, which is a starting portion for tearing, is partially arranged at a tearing portion of a seal portion of the laminated bag,
The starting point of the score line was set near this starting point,
An easily-openable laminated bag according to any one of claims 1 to 3.
脂フイルム層、２軸延伸ナイロンフイルム層または２軸
延伸ポリオレフインフイルム層であって、蛍光配向法に
よる配向係数がそれぞれ０．１≦Ｌ＜０．９、０．１≦
Ｍ＜０．９、０．２≦Ｎ≦０．８を満足する延伸フイル
ムであり、（ｂ）中間層はアルミ箔を含む層であり、
（ｃ）最内層はポリオレフィン系樹脂フイルム層であ
る、 積層フイルムの巾方向両端部の内層を合せて接合した背
張部を有する筒状体を形成し、背張部を筒状体に密着さ
せ、筒状体の上下開口端を接合するとともに該開口上下
端近傍に背張部の上下各端を接合した積層袋の胴部の引
裂開始部の最外層に引裂の取っ掛かりとなる微小凹凸か
らなる粗面部を配置し、積層袋の背張り部の最外層に引
裂方向に対して傾斜した短線状のスコアを引裂方向に配
列したスコア線と、該スコアと逆方向に傾斜した短線状
のスコアを引裂方向に配列したスコア線とを交互に配置
し、引裂開始部に向って末広がりになるハの字形のスコ
アにより形成されるスコア線を設置した易開封性積層
袋。6. (a) The outermost layer is a biaxially stretched polyester resin film layer, a biaxially stretched nylon film layer or a biaxially stretched polyolefin film layer, each having an orientation coefficient of 0.1 ≦ L <by a fluorescence orientation method. 0.9, 0.1 ≦
A stretched film satisfying M <0.9, 0.2 ≦ N ≦ 0.8, and (b) the intermediate layer is a layer containing an aluminum foil;
(C) The innermost layer is a polyolefin resin film layer. A tubular body having a backing portion formed by joining inner layers at both ends in the width direction of the laminated film is formed, and the backing portion is brought into close contact with the tubular body. The upper and lower ends of the tubular body are joined together and the upper and lower ends of the opening are joined to each other at the upper and lower ends. A score line in which short-line scores inclined in the tear direction are arranged in the tear direction on the outermost layer of the backing portion of the laminated bag in the tear direction, and a short-line score inclined in the opposite direction to the score. And the score lines arranged in the tearing direction are arranged alternately, and a score line formed by a C-shaped score that spreads toward the tearing start portion is provided.
側フイルムと裏側フイルムの折り返し部の最外層表面に
配置した、請求項６に記截された易開封性積層袋。7. The easy-opening laminated bag as set forth in claim 6, wherein the roughened surface portion composed of minute irregularities is disposed on the outermost layer surface of the folded portion of the front film and the back film of the laminated bag.
フイルムと裏側フイルムの折り返し部の全面に配置し
た、請求項６または７に記載された易開封性積層袋。8. The easily-openable laminated bag according to claim 6, wherein a roughened surface portion composed of fine irregularities is disposed on the entire surface of the folded portion of the front film and the back film of the laminated bag.
層袋に密着した背張部の表側の外層フイルムに設置し
た、請求項６または７に記載された易開封性積層袋。9. The easy-opening laminated bag according to claim 6, wherein a score line in which a C-shaped score is arranged is provided on the outer layer film on the front side of the backing portion closely attached to the laminated bag.
積層袋に密着した背張部の該袋に密着した面の外層フイ
ルムにも設置した、請求項６ないし９のいずれか１項に
記載された易開封性積層袋。10. The film according to claim 6, wherein a score line in which a U-shaped score is arranged is also provided on an outer layer film on a surface of the backing portion in close contact with the laminated bag. Easy-open laminated bag.
され、引裂の取っ掛かり部である粗面部が積層袋の表側
フイルムと裏側フイルムの折り返し部の全面に配置され
た、請求項６ないし１０のいずれか１項に記載された易
開封性積層袋。11. The score line is disposed on the entire outermost layer of the laminated bag, and the roughened surface portion, which is a starting portion for tearing, is disposed on the entire folded portion of the front side film and the back side film of the laminated bag. The easy-opening laminated bag according to any one of items 10 to 10.
層袋の表側フイルムと裏側フイルムの折り返し部に部分
的に配置され、スコア線の始点がこの取っ掛かり部の近
傍に配置された、請求項６ないし１０のいずれか１項に
記載された易開封性積層袋。12. The method according to claim 1, wherein the rough surface portion, which is a starting portion for tearing, is partially disposed in the folded portion of the front film and the back film of the laminated bag, and the starting point of the score line is disposed in the vicinity of the starting portion. Item 11. An easily-openable laminated bag according to any one of Items 6 to 10.
コアを引裂方向に配列したスコア線と、該スコアと逆方
向に傾斜した短線状のスコアを引裂方向に配列したスコ
ア線を夫々１本づつ組み合わせて配置した、請求項１な
いし１２のいずれか１項に記載された易開封性積層袋。13. A score line in which short-line scores inclined with respect to the tear direction are arranged in the tear direction, and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tear direction. The easy-opening laminated bag according to any one of claims 1 to 12, which is arranged in combination with each other.
コアを引裂方向に配列したスコア線と、該スコアと逆方
向に傾斜した短線状のスコアを引裂方向に配列したスコ
ア線を一方の傾斜方向のスコア線を１本挾んで逆の傾斜
方向のスコア線を２本組み合わせて配置した、請求項１
ないし１２のいずれか１項に記載された易開封性積層
袋。14. A score line in which short-line scores inclined with respect to the tearing direction are arranged in the tearing direction, and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tearing direction. 2. A score line in the opposite direction is disposed in combination with two score lines in opposite directions sandwiching one score line in the direction.
13. The easy-opening laminated bag according to any one of the above items 12 to 12.
コアを引裂方向に配列したスコア線と、該スコアと逆方
向に傾斜した短線状のスコアを引裂方向に配列したスコ
ア線を夫々交互に複数本配置した、請求項１ないし１２
のいずれか１項に記載された易開封性積層袋。15. A score line in which short-line scores inclined with respect to the tear direction are arranged in the tear direction, and a score line in which short-line scores inclined in the opposite direction to the score are arranged in the tear direction, alternately. 13. A plurality of wires are arranged.
An easily-openable laminated bag according to any one of the above.
た、請求項１ないし１５のいずれか１項に記載された易
開封性積層袋。16. The easily-openable laminated bag according to claim 1, wherein the score lines are formed in a continuous line.
部分的に配置された、請求項１ないし１５のいずれか１
項に記載された易開封性積層袋。17. The score line according to claim 1, wherein the score lines are discontinuous and partially arranged in the tear direction.
The easy-opening laminated bag described in the paragraph.
コアを引裂方向に配列したスコア線と、該スコアと逆方
向に傾斜したスコア線を引裂方向に配列したスコア線と
を０．５ｍｍ〜１０ｍｍの間隔で交互に設置した、請求
項１ないし１７のいずれか１項に記載された易開封性積
層袋。18. A score line in which short-line scores inclined with respect to the tear direction are arranged in the tear direction, and a score line in which a score line inclined in the opposite direction to the score is arranged in the tear direction is 0.5 mm or more. The easy-opening laminated bag according to any one of claims 1 to 17, wherein the laminated bag is arranged alternately at intervals of 10 mm.
コアの傾斜角度が１５°〜８０°である、請求項１ない
し１８のいずれか１項に記載された易開封性積層袋。19. The easily-openable laminated bag according to claim 1, wherein the inclination angle of the short-line score inclined with respect to the tearing direction is 15 ° to 80 °.
コアを配列したスコア線のスコアのピッチが０．３ｍｍ
〜５ｍｍである、請求項１ないし１９のいずれか１項に
記載された易開封性積層袋。20. The score pitch of a score line in which short-line scores inclined with respect to the tearing direction are arranged has a pitch of 0.3 mm.
20. The easily-openable laminated bag according to any one of claims 1 to 19, which has a thickness of 5 to 5 mm.
ないし２０のいずれか１項に記載された易開封性積層
袋。21. The intermediate layer according to claim 1, wherein the intermediate layer is made of aluminum foil.
21. The easily-openable laminated bag according to any one of items 20 to 20.
ポリエチレン層の積層体からなる、請求項１ないし２０
のいずれか１項に記載された易開封性積層袋。22. An intermediate layer comprising a polyethylene layer / aluminum foil /
21. A laminated body of polyethylene layers.
An easily-openable laminated bag according to any one of the above.
箔層との積層体からなる、請求項１ないし２０のいずれ
か１項に記載された易開封性積層袋。23. The easy-opening laminated bag according to claim 1, wherein the intermediate layer comprises a laminate of a biaxially stretched nylon layer and an aluminum foil layer.
ステル層との積層体からなる、請求項１ないし２０のい
ずれか１項に記載された易開封性積層袋。24. The easy-opening laminated bag according to claim 1, wherein the intermediate layer comprises a laminate of an aluminum foil layer and a biaxially stretched polyester layer.
層である、請求項１ないし２４のいずれか１項に記載さ
れた易開封性積層袋。25. The easily-openable laminated bag according to claim 1, wherein the inner layer is an ethylene-acrylic acid copolymer layer.
る、請求項１ないし２４のいずれか１項に記載された易
開封性積層袋。26. The easily-openable laminated bag according to claim 1, wherein the inner layer comprises a low-density polyethylene layer.
る、請求項１ないし２４のいずれか１項に記載された易
開封性積層袋。27. The easily-openable laminated bag according to claim 1, wherein the inner layer comprises a homopolypropylene layer.
８０％である、請求項１ないし２７のいずれか１項に記
載された易開封性積層袋。28. The easily-openable laminated bag according to claim 1, wherein the thickness of the inner layer is 20 to 80% of the thickness of the entire layer.
した、請求項１ないし２８のいずれか１項に記載された
易開封性積層袋。29. The easily-openable laminated bag according to claim 1, wherein an adhesive is provided between each layer of the laminated film.
した、請求項１ないし２９のいずれか１項に記載された
易開封性積層袋。30. The easily-openable laminated bag according to any one of claims 1 to 29, wherein an indication of a tearing direction is displayed on an opening portion of the trunk portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6151404A JP2725600B2 (en) | 1994-05-31 | 1994-05-31 | Easy-open laminated bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6151404A JP2725600B2 (en) | 1994-05-31 | 1994-05-31 | Easy-open laminated bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07329986A JPH07329986A (en) | 1995-12-19 |
| JP2725600B2 true JP2725600B2 (en) | 1998-03-11 |
Family
ID=15517856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6151404A Expired - Fee Related JP2725600B2 (en) | 1994-05-31 | 1994-05-31 | Easy-open laminated bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2725600B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4447075B2 (en) * | 1999-07-01 | 2010-04-07 | 大日本印刷株式会社 | Manufacturing method for easy-open packaging bags |
| EP1438237B1 (en) * | 2001-10-26 | 2012-01-11 | Hosokawa Yoko Co., Ltd. | Packaging member with easy-opening means |
-
1994
- 1994-05-31 JP JP6151404A patent/JP2725600B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07329986A (en) | 1995-12-19 |
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