JPH05139463A - Sealed package - Google Patents
Sealed packageInfo
- Publication number
- JPH05139463A JPH05139463A JP3295723A JP29572391A JPH05139463A JP H05139463 A JPH05139463 A JP H05139463A JP 3295723 A JP3295723 A JP 3295723A JP 29572391 A JP29572391 A JP 29572391A JP H05139463 A JPH05139463 A JP H05139463A
- Authority
- JP
- Japan
- Prior art keywords
- container
- layer
- sealant layer
- lid
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Packages (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は安価に易開封性に優れた
密封包装体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically sealed package which is inexpensive and excellent in easy opening.
【０００２】[0002]
【従来の技術】従来より包装体の機能をアップするため
に、それぞれ異なる性質を持つ物質を積層するという技
術は知られており、多くの分野に用いられている。たと
えば水蒸気バリア性、耐熱性を有するポリプロピレン
（以下ＰＰと略する）と酸素バリア性を有するエチレン
ビニルアルコール共重合体（以下ＥＶＯＨと略する）を
ＥＶＯＨを中心層として、それぞれを接着剤により、積
層した容器は保存プラスチック容器として多くの分野で
用いられている。2. Description of the Related Art Conventionally, a technique of stacking substances having different properties in order to improve the function of a package has been known and used in many fields. For example, polypropylene (hereinafter abbreviated as PP) having water vapor barrier properties and heat resistance and ethylene vinyl alcohol copolymer (hereinafter abbreviated as EVOH) having oxygen barrier properties are laminated with EVOH as a central layer with an adhesive agent. These containers are used as storage plastic containers in many fields.
【０００３】これらの多層構成からなる容器を易開封性
を保持しながら密封するためには、多層構成体の各層の
接着強度が蓋体との密封強度より強い必要がある。もし
密封強度が層間の接着強度より強い場合は、開封時に蓋
体と容器の界面から分離せずに、容器内の層間からの分
離が生じ、蓋体と容器シーラント層との袋状のものが形
成され、内容物が容易に取り出せない欠点があった。ま
た、これを解決するために、シール条件、及び蓋体の材
質変更等により、密封強度を容器の接着強度より低く設
定することは、密封信頼性を低下させ、輸送中又は工程
内で密封不良を発生させる場合があった。In order to hermetically seal a container having such a multi-layered structure while maintaining the easy-opening property, the adhesive strength of each layer of the multi-layered structure must be stronger than the sealing strength with the lid. If the sealing strength is stronger than the adhesive strength between the layers, it does not separate from the interface between the lid and the container at the time of unsealing, but separation occurs between the layers in the container, and a bag-like thing between the lid and the container sealant layer occurs. It had a drawback that it was formed and the contents could not be taken out easily. In order to solve this problem, if the sealing strength is set lower than the adhesive strength of the container by changing the sealing conditions and the material of the lid, etc., the sealing reliability will be reduced and the sealing failure will occur during transportation or in the process. In some cases.
【０００４】これらの問題点を解決する方法としては、
容器内の層間接着強度を高める方法が一般的に用いられ
ているが、このためには、高価な接着剤の使用や、層間
強度を高めるための前処理等が必要であり、高コストが
避けられなかった。一方、容器の層間接着強度を低いレ
ベルで調整し、容器内１層を剥離させながら、開封させ
る方法が種々提案され（特開昭６２−２５１３６３号公
報等）、密封性と易開封性を兼ね備えているものが提案
されているが、容器成形後に切り込み加工工程があり、
容器が高価となってしまうという欠点があった。また、
容器密封時のシール盤形状等により、容器内剥離を終了
させ、開封させるコスト的にも有利な提案がなされてい
るが、容器材質によっては不可能な場合があること、あ
るいは位置調整等が必要といった問題があり、他の簡便
な方法が求められていた。又、容器形態の変更（例え
ば、容器フランジ外縁部を下方に折り曲げる）といった
ことで容器内剥離を防ぐことは知られていたが、容器デ
ザイン的に制限を受けるといった欠点があった。As a method for solving these problems,
A method of increasing the interlayer adhesion strength in the container is generally used, but this requires the use of an expensive adhesive and pretreatment for increasing the interlayer strength, which avoids high costs. I couldn't do it. On the other hand, various methods have been proposed in which the interlaminar adhesive strength of the container is adjusted at a low level, and one layer inside the container is peeled off while opening the container (Japanese Patent Laid-Open No. 62-251363, etc.), which has both sealing property and easy opening property. However, there is a cutting process after molding the container,
There is a drawback that the container becomes expensive. Also,
A cost-effective proposal has been made to finish peeling inside the container and open it due to the shape of the sealing plate when sealing the container, but it may not be possible depending on the material of the container, or it is necessary to adjust the position etc. Therefore, another convenient method has been demanded. Further, although it has been known to prevent peeling in the container by changing the container form (for example, bending the outer edge of the container flange downward), there is a drawback that the container design is restricted.
【０００５】[0005]
【発明が解決しようとする課題】本発明は容器形態の変
更、及び多層構成体における種々の層間接着強度向上に
伴うコストアップ、容器材質にとらわれることなく、層
間接着強度の低い多層容器で易開封性を持った密封包装
体を提供するにある。DISCLOSURE OF THE INVENTION The present invention provides a multi-layer container having a low interlayer adhesive strength, which is easy to open regardless of the change of the container shape and the increase of various interlayer adhesive strengths in the multilayer structure, without being restricted by the container material. The purpose is to provide a hermetically sealed package.
【０００６】[0006]
【課題を解決するための手段】本発明は、フランジを有
する容器に蓋材をシールしてなる包装体において、容器
の構成がシーラント層とこれに接する隣接層とのラミネ
ート強度が該シーラント層とシールされる蓋材との開封
強度以下であり、シーラント層の厚みが１０μ以上であ
る少なくとも２層以上の多層構成体からなり、容器フラ
ンジの外側部に１ｍｍ以上の巾の未シール部を有するこ
とを特徴とする密封包装体である。DISCLOSURE OF THE INVENTION The present invention relates to a package in which a container having a flange is sealed with a lid material, and the container has a sealant layer and a laminate strength of the sealant layer and an adjacent layer in contact with the sealant layer. It must be less than the opening strength with the lid material to be sealed, and must consist of a multi-layered structure of at least two layers in which the thickness of the sealant layer is 10 μm or more, and have an unsealed portion with a width of 1 mm or more on the outer side of the container flange. A sealed package characterized by the following.
【０００７】本発明によると、シーラント層の厚みと層
間強度が弱いものであれば任意の容器が用いられる。ま
た層間接着強度を向上させる為の特別の手段をとる必要
もなく、例えばシーラント層がポリエチレン（ＰＥ）で
その隣接層がＰＰからなる容器や、その他シーラント層
として、他の樹脂との接着強度のでにくいポリカーボネ
ート（ＰＣ）、ポリエチレンテレフタレート（ＰＥ
Ｔ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリス
チレン（ＰＳ）といった樹脂を用いることができ、その
隣接層としてはＰＰ、ＥＶＯＨ、ナイロン（Ｎｙ）等が
用いられる。またＥＶＯＨやアルミ箔や塩化ビニリデン
樹脂（ＰＶＤＣ）等をバリア層として用いた多層構成体
も使用できる。According to the present invention, any container may be used as long as the sealant layer has a low thickness and a low interlayer strength. Further, it is not necessary to take any special means for improving the interlayer adhesive strength. For example, a container having a sealant layer made of polyethylene (PE) and an adjacent layer made of PP, or another sealant layer having a high adhesive strength with other resins is used. Hard Polycarbonate (PC), Polyethylene Terephthalate (PE
Resins such as T), polybutylene terephthalate (PBT) and polystyrene (PS) can be used, and PP, EVOH, nylon (Ny) and the like are used as the adjacent layer. Further, a multilayer structure using EVOH, aluminum foil, vinylidene chloride resin (PVDC) or the like as a barrier layer can also be used.
【０００８】これらの樹脂を積層する方法としては共押
出法、共押出ラミネート法、押出ラミネート法、ドライ
ラミネート法等の公知の積層化技術が用いられる。また
これらの積層化のために各樹脂間を接着させるために
は、個々の樹脂間に適した接着剤、あるいは接着性樹脂
が用いられるが、特に接着強度を向上させる為の特別な
接着剤層でなくても当然良い。また、これらの多層シー
トを容器に成形する方法としては、一般的に用いられる
真空成形法、圧空成形法、真空圧空成形法や金属を１層
として用いる場合は冷間加工法が用いることができる。
本発明に用いられる蓋材としては、容器最内層とシール
可能なものであり、容器シーラント層と易開封を示すも
のであれば、任意の蓋材が使用できる。例えば、易開封
性を示すものとしては、容器シーラント層と接着可能な
ものと非接着のものを易開封性を持たせるように混合し
たもの、粘着性のもの、あるいは蓋材のシーラント層と
蓋材の基材層が層間剥離し、易開封性をしめすものがあ
る。As a method for laminating these resins, known laminating techniques such as a coextrusion method, a coextrusion laminating method, an extrusion laminating method and a dry laminating method are used. Further, in order to bond the resins to each other for the purpose of stacking these, an adhesive suitable for the individual resins or an adhesive resin is used, but a special adhesive layer for improving the adhesive strength is used. Not necessarily good. As a method of molding these multilayer sheets into a container, a vacuum forming method, a pressure forming method, a vacuum pressure forming method which are generally used, or a cold working method when a metal is used as one layer can be used. ..
As the lid material used in the present invention, any lid material can be used as long as it can seal the innermost layer of the container and exhibits a container sealant layer and easy opening. For example, as a material exhibiting easy-opening property, a mixture of a material capable of adhering with the container sealant layer and a non-adhesive material so as to have an easy-opening property, an adhesive material, or a sealant layer and a lid of a lid material. In some cases, the base material layer of the material is delaminated to show easy opening.
【０００９】上記蓋材の易開封層にバリア性層としてＰ
ＶＤＣ、ＥＶＯＨ、アルミ箔、Ｎｙ等やＰＥＴといった
印刷適性に優れた層が積層される。また、蓋体はフィル
ム形状に限らず、成形品形態のものも用いられる。例え
ば、シーラントがヒートシール性ＰＥＴでありバリア層
にＥＶＯＨ、外層をＰＰとした多層シートを真空成形に
より、落とし蓋形状に成形し、用いることも可能であ
る。これらの蓋体と本体容器を溶着する方法としては、
公知のヒートシール法、超音波シール法、高周波シール
法等が用いられる。P is used as a barrier layer on the easy-opening layer of the lid material.
Layers having excellent printability such as VDC, EVOH, aluminum foil, Ny and PET are laminated. Further, the lid is not limited to the film shape, and a molded article form may be used. For example, a multilayer sheet having a heat sealable PET as a sealant, EVOH as a barrier layer and PP as an outer layer can be formed into a drop lid shape by vacuum forming and used. As a method of welding these lid and main body container,
Known heat sealing method, ultrasonic sealing method, high frequency sealing method and the like are used.
【００１０】[0010]
【作用】本発明の作用について説明する。多層容器のフ
ランジ部の外縁は通常各層間の境界がでてくる。図１の
ように、蓋材１をフランジ外縁部までシールすると、容
器２のシーラント層５とそれに隣接する隣接層６間との
ラミネート強度が蓋材のシーラント層４と容器のシーラ
ント層５との開封強度以下であれば開封力は容器の層間
を剥離しようとする力としても働く。このとき層間強度
が蓋材のシーラント層４と容器のシーラント層５との開
封強度以下（通常は層間接着強度は１２００ｇ／２５ｍ
ｍ巾以下）であれば、開封しようとする力はすべて、層
間剥離に働き、剥離が進むと、蓋材と容器の１層が袋状
を形成することになり、内容物をとりだすことはできな
い。The function of the present invention will be described. The outer edge of the flange portion of the multilayer container usually has a boundary between the layers. As shown in FIG. 1, when the lid member 1 is sealed up to the outer edge of the flange, the lamination strength between the sealant layer 5 of the container 2 and the adjacent layer 6 adjacent to the sealant layer 5 of the lid member and the sealant layer 5 of the container is increased. If it is less than the unsealing strength, the unsealing force also works as a force to separate the layers of the container. At this time, the interlayer strength is equal to or lower than the unsealing strength between the sealant layer 4 of the lid material and the sealant layer 5 of the container (usually, the interlayer adhesive strength is 1200 g / 25 m.
When the peeling progresses, one layer of the lid material and the container forms a bag shape, and the contents cannot be taken out. ..
【００１１】一方、図２に示すように、フランジ外側部
から１ｍｍ以上の巾の未シール部８を残すことにより開
封力は蓋材と容器間の接着を分離する力とシーラント層
を破壊するちからに分散されるが、本発明はシーラント
層が十分に厚く、シーラント層間のラミネート強度が蓋
材のシーラント層４と容器のシーラント層５との開封強
度以下であっても、シーラント層の剥離は生せず、さら
にシーラント層を破壊させずに開封できる。このとき、
未シール部の巾が１ｍｍ以内であると、開封する力は僅
かではあるが、層間剥離力として働き、層間剥離が生じ
る。この観点から未シール部８はフランジ外縁から１ｍ
ｍ以上の外側のフランジの外側部に有することが望まし
い。またシーラント層５が１０μ以下の場合は開封力が
シーラント層の破壊力として働き、さらには、層間剥離
につながる場合があり、シーラント層５の厚みは１０μ
以上であることが望ましい。On the other hand, as shown in FIG. 2, by leaving an unsealed portion 8 having a width of 1 mm or more from the outer side of the flange, the unsealing force may separate the adhesion between the lid and the container and destroy the sealant layer. However, in the present invention, even if the sealant layer is sufficiently thick and the laminating strength between the sealant layers is equal to or lower than the opening strength between the sealant layer 4 of the lid material and the sealant layer 5 of the container, peeling of the sealant layer is not caused. It can be opened without breaking the sealant layer. At this time,
If the width of the unsealed portion is 1 mm or less, the force for opening is small, but the layer acts as an interlayer peeling force to cause interlayer peeling. From this viewpoint, the unsealed portion 8 is 1 m from the outer edge of the flange.
It is desirable to have it on the outer side of the outer flange of m or more. When the sealant layer 5 has a thickness of 10 μm or less, the unsealing force acts as a destructive force for the sealant layer and may lead to delamination. The sealant layer 5 has a thickness of 10 μm.
The above is desirable.
【００１２】易開封性の機能を有する蓋材の容器への接
着強度（開封強度）は一般的には１０００〜１５００ｇ
／２５ｍｍ巾であり、この強度の開封強度であれば、密
封包装体の開封がスムーズに行うことが可能である。本
発明においては、容器のシーラント層５と、これに隣接
する隣接層６間のラミネート強度が、蓋材の開封強度以
下であっても、シーラント層５の厚みを１０μ以上とす
ること、及び容器フランジの外縁部より１ｍｍ以上の外
側に未シール部８を残すことで、開封時にシーラント層
５とその隣接層６との剥離をおさえて、蓋材とのシール
部９より容易に開封できるようにしたものである。The adhesive strength (opening strength) of the lid material having the function of easy opening to the container is generally 1000 to 1500 g.
The width is / 25 mm, and if the opening strength is this strength, the sealed package can be smoothly opened. In the present invention, the thickness of the sealant layer 5 is set to 10 μm or more even if the laminate strength between the sealant layer 5 of the container and the adjacent layer 6 adjacent thereto is not more than the unsealing strength of the lid material, and the container By leaving the unsealed portion 8 outside the outer edge portion of the flange by 1 mm or more, peeling between the sealant layer 5 and the adjacent layer 6 can be suppressed at the time of opening, so that the sealing material 9 can be easily opened from the sealing portion 9 with the lid member. It was done.
【００１３】[0013]
【実施例】表１に本発明に用いた実施例５種と比較のた
め用いた３種の多層シートの構成を示す。これらの多層
シートは共押出法により作成した。これらの多層シート
は間接加熱式の真空成形機を用いて、口径８０ｍｍφ、
高さ５０ｍｍ、底径４０ｍｍφの容器を作成した。これ
らの容器２は容器のシーラント層５と同種の樹脂を用い
た蓋材１により容器との密封強度が１５００ｇ／２５ｍ
ｍ幅になるように、ヒートシール法により密封した。ま
た評価に用いた実施例、比較例の多層シートのシーラン
ト層５と隣接層６との層間剥離強度は表１中にも示した
ように蓋材のシーラント層４と容器のシーラント層５と
の開封強度以下であった。なお実施例１、３、４、５は
シーラント層５と隣接層６間にＥＶＡ系の通常用いられ
る接着剤を使用し、実施例２では接着剤は使用していな
い。開封性の評価は数人の開封性評価モニターにより、
実際に密封包装体を開封することにより評価した。開封
可能で内容物がとりだせるものについては○、開封時に
シール層と隣接層との層間に剥離が生じ、蓋材と容器本
体シール層とで袋が形成され、内容物が取り出し不能の
ものを×とした。EXAMPLES Table 1 shows the structures of the five types of examples used in the present invention and three types of multilayer sheets used for comparison. These multilayer sheets were prepared by the coextrusion method. These multilayer sheets were calibrated using an indirect heating type vacuum forming machine,
A container having a height of 50 mm and a bottom diameter of 40 mmφ was prepared. These containers 2 have a sealing strength of 1500 g / 25 m with respect to the container due to the lid member 1 made of the same resin as the sealant layer 5 of the container.
It was sealed by a heat sealing method so as to have a width of m. In addition, as shown in Table 1, the peeling strength between the sealant layer 5 and the adjacent layer 6 of the multilayer sheets of Examples and Comparative Examples used for the evaluation is as shown in Table 1 between the sealant layer 4 of the lid material and the sealant layer 5 of the container. It was less than the opening strength. In addition, in Examples 1, 3, 4, and 5, an EVA-based commonly used adhesive is used between the sealant layer 5 and the adjacent layer 6, and in Example 2, no adhesive is used. The evaluation of the openability is performed by several openability evaluation monitors.
It was evaluated by actually opening the hermetically sealed package. For those that can be opened and the contents can be taken out, ○, those that could not be taken out when the contents of the seal layer and the adjacent layer were separated from each other when peeling occurred and a bag was formed with the lid material and the container body seal layer. It was set to x.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【発明の効果】本発明の密封包装体は、容器のシーラン
ト層とそれに隣接する隣接層間の接着強度が蓋材のシー
ラント層と容器のシーラント層との密封強度（開封強
度）以下であっても、蓋材の開封が容器のシーラント層
と蓋材のシーラント層間で行われ、容器のシーラント層
と隣接層間の剥離は生じることない。このために容器の
シーラント層と隣接層間に特別な接着剤又は接着層を設
けなくても良く、また層間強度を向上させるためのフラ
ンジの後加工なしに蓋材との易開封性を保ちながら容器
の層間剥離しない包装体が容易にかつ安価に得ることが
できる。In the hermetically sealed package of the present invention, even if the adhesive strength between the sealant layer of the container and the adjacent layer adjacent thereto is not more than the sealing strength (opening strength) between the sealant layer of the lid and the sealant layer of the container. The opening of the lid material is performed between the sealant layer of the container and the sealant layer of the lid material, and peeling between the sealant layer of the container and the adjacent layer does not occur. Therefore, it is not necessary to provide a special adhesive or an adhesive layer between the sealant layer of the container and the adjacent layer, and the container can be easily opened with the lid material without post-processing of the flange for improving the interlayer strength. It is possible to easily and inexpensively obtain a package that is not delaminated.
【図１】従来の包装体とその開封状態を示す断面図FIG. 1 is a cross-sectional view showing a conventional package and its opened state.
【図２】本発明の包装体とその開封状態を示す断面図FIG. 2 is a cross-sectional view showing the package of the present invention and its opened state.
Claims (1)
てなる包装体において、容器の構成がシーラント層とこ
れに接する隣接層とのラミネート強度が該シーラント層
とシールされる蓋材との開封強度以下であり、シーラン
ト層の厚みが１０μ以上である少なくとも２層以上の多
層構成体からなり、容器フランジの外側部に１ｍｍ以上
の巾の未シール部を有することを特徴とする密封包装
体。1. A packaging body obtained by sealing a lid member in a container having a flange, wherein the container has a lamination strength between a sealant layer and an adjacent layer in contact with the sealant layer, and the lid member sealed with the sealant layer is opened. A hermetically-sealed package comprising a multi-layered structure of at least two layers having a strength of not more than 10 and a sealant layer thickness of 10 μm or more, and having an unsealed portion having a width of 1 mm or more on an outer portion of a container flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295723A JP2693671B2 (en) | 1991-11-12 | 1991-11-12 | Sealed package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3295723A JP2693671B2 (en) | 1991-11-12 | 1991-11-12 | Sealed package |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05139463A true JPH05139463A (en) | 1993-06-08 |
| JP2693671B2 JP2693671B2 (en) | 1997-12-24 |
Family
ID=17824336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3295723A Expired - Fee Related JP2693671B2 (en) | 1991-11-12 | 1991-11-12 | Sealed package |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2693671B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000198166A (en) * | 1999-01-07 | 2000-07-18 | Sumitomo Bakelite Co Ltd | Easy opening package having aroma retaining property |
| JP2000238846A (en) * | 1998-12-21 | 2000-09-05 | Sumitomo Bakelite Co Ltd | Sealed package |
| JP2007168829A (en) * | 2005-12-20 | 2007-07-05 | Asahi Breweries Ltd | Cap seal having top plate |
| JP2016147454A (en) * | 2015-02-13 | 2016-08-18 | 東レフィルム加工株式会社 | Laminated film for sealing lid material with open easiness, and container with open easiness |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03666A (en) * | 1989-05-15 | 1991-01-07 | Sun A Chem Ind Co Ltd | Easy-to-open package and its manufacture |
-
1991
- 1991-11-12 JP JP3295723A patent/JP2693671B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03666A (en) * | 1989-05-15 | 1991-01-07 | Sun A Chem Ind Co Ltd | Easy-to-open package and its manufacture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000238846A (en) * | 1998-12-21 | 2000-09-05 | Sumitomo Bakelite Co Ltd | Sealed package |
| JP2000198166A (en) * | 1999-01-07 | 2000-07-18 | Sumitomo Bakelite Co Ltd | Easy opening package having aroma retaining property |
| JP2007168829A (en) * | 2005-12-20 | 2007-07-05 | Asahi Breweries Ltd | Cap seal having top plate |
| JP2016147454A (en) * | 2015-02-13 | 2016-08-18 | 東レフィルム加工株式会社 | Laminated film for sealing lid material with open easiness, and container with open easiness |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2693671B2 (en) | 1997-12-24 |
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