JPH11171247A - Easily opening sealed container and manufacture of container main body to be used therefor - Google Patents
Easily opening sealed container and manufacture of container main body to be used thereforInfo
- Publication number
- JPH11171247A JPH11171247A JP34032797A JP34032797A JPH11171247A JP H11171247 A JPH11171247 A JP H11171247A JP 34032797 A JP34032797 A JP 34032797A JP 34032797 A JP34032797 A JP 34032797A JP H11171247 A JPH11171247 A JP H11171247A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- container
- seal
- sealing
- flange portion
- 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
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Packages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、フランジ部を有す
るプラスチック製のカップ体と蓋材とから構成された容
器において、蓋をイージーオープンすることができる易
開封構造の密封容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed container having an easy-open structure in which a lid can be easily opened in a container comprising a plastic cup body having a flange portion and a lid member.
【０００２】[0002]
【従来の技術】各種の食品類を包装するための容器とし
て、蓋が容易に開封できるイージーオープン構造のプラ
スチック製密封容器が汎用されている。従来から実用さ
れている最も一般的なイージーオープン式の構造は、蓋
材のシール層を構成する樹脂の組成を変えることによっ
て容器フランジ部とのシール強度を適度の範囲（通常、
５００〜１５００ｇ／１５ｍｍ）に調整し、シール界面
をピールして開封する形態のものである（界面剥離タイ
プ）。ところが、この界面剥離タイプでは、付与するシ
ール強度がシール時の条件、環境温度、内容物の付着等
の影響を受け易いために目的範囲の制御が難しく、往々
にして強弱のバラツキを発生させる欠点がある。このバ
ラツキは、弱い方に偏るとシール漏れを生じ、逆に強い
方に偏るとピール性を阻害して易開封性を損ねる結果を
招く。とくにシール漏れは密封容器としての致命的な欠
陥となるため、通常、ピール性を犠牲にしてもシールの
熱圧条件を高めに設定する方策が採られている。2. Description of the Related Art As a container for packaging various foods, a plastic sealed container having an easy-open structure, which can be easily opened, is widely used. The most common easy-open structure that has been used in the past is to change the composition of the resin that forms the sealing layer of the lid material to change the sealing strength between the container flange and the container in an appropriate range (usually,
(500 to 1500 g / 15 mm), peeling off the seal interface and opening the seal (interfacial peeling type). However, this interfacial peeling type has a disadvantage in that the target range is difficult to control because the sealing strength to be applied is easily affected by conditions at the time of sealing, environmental temperature, adherence of contents, etc. There is. This variation results in seal leakage when biased toward the weak side, and conversely, when biased toward the strong side, impairs the peelability and impairs the ease of opening. In particular, since leakage of a seal becomes a fatal defect as a sealed container, a measure is usually taken to set the heat and pressure conditions of the seal to be higher even at the expense of peelability.
【０００３】このような問題点を改善するため、例えば
特公昭５０−３７５９７号公報に記載されているように
容器側のシール層とこれに隣接する層との間をデラミネ
ーションすることによって開封する方法（層間剥離タイ
プ）が知られている。しかし、通常のシール方式でこの
構造を採ろうとするとシール層部分が円滑に破断せず、
内容物が取り出しにくいという難点がある。この場合、
剥離層と隣接層との切り離しを容易にするため、フラン
ジ部に切り込みを設ける構造（特開昭６２−２５１３６
３号公報、同６３−７８号公報、同６３−２５０３７号
公報等）、フランジ部に剥離開始用切り欠きと剥離停止
用の切り欠きを設置した構造（特開昭６３−９６０６０
号公報）ほか多数の改良提案がなされているが、これら
構造においては耐圧性を損ねる危険性がある。そのうえ
シール位置を正しく制御しないとシール部が切断され難
しくなって蓋と容器本体が分離しないケースがあり、開
封性の面にも問題が残されている。また、特願平３−２
００５６０号公報には容器フランジ部の全面もしくは一
部の周面に１ｃｍ2当たり５０〜５００個の微小凹部を
形成する提案がされているが、凹部の間隔が十分微小で
あるとはいえず、開封時にシール層を破断する際シール
層が延びてヒゲ状になり開封後の外観が満足できない場
合があった。In order to solve such a problem, for example, as described in Japanese Patent Publication No. 50-37597, the seal is opened by delamination between the sealing layer on the container side and the layer adjacent thereto. A method (delamination type) is known. However, when trying to adopt this structure with a normal sealing method, the sealing layer portion does not break smoothly,
There is a drawback that the contents are difficult to remove. in this case,
A structure in which a notch is provided in a flange portion to facilitate separation of a peeling layer and an adjacent layer (Japanese Patent Application Laid-Open No. 62-25136)
Nos. 3, 63-78, 63-25037, etc.) and a structure in which a notch for starting peeling and a notch for stopping peeling are provided in a flange portion (Japanese Patent Laid-Open No. 63-96060).
And many other improvement proposals have been made, but in these structures there is a risk of impairing the pressure resistance. In addition, if the sealing position is not properly controlled, there are cases where the sealing portion is cut and difficult, and the lid and the container main body are not separated, and there is still a problem in the openability. In addition, Japanese Patent Application No. 3-2
No. 00560 proposes to form 50 to 500 minute recesses per 1 cm 2 on the entire surface or a part of the peripheral surface of the container flange portion. However, it cannot be said that the interval between the recesses is sufficiently small. When the seal layer was broken at the time of opening, the seal layer was elongated and became whisker-like, and the appearance after opening was sometimes unsatisfactory.
【０００４】[0004]
【発明が解決しようとする課題】発明者らは、従来技術
において背反性能とされている耐圧密封性とイージーピ
ール性を両立させるシール構造について研究を重ねた結
果、容器のフランジ部に予め無数の十分に微小な凹部を
形成しておくと密封性を損ねることなしに円滑な層間剥
離を介して開封でき、開封後の外観も良好なシール構造
が形成できる事実を確認した。本発明は前記の知見に基
づいて開発されたもので、安定した耐圧性を保持しなが
ら円滑なイージーオープン性を備える密封容器の提供を
目的としている。フランジ部の表面にメッシュ状の凹凸
を形成して蓋材との接合密着性を向上させる試みは実開
平１−１１０１２０号公報に開示されているが、本発明
でフランジ部に形成されるパターンは楔状凹部であり、
また易開封性を課題としている点でこれら先行技術とは
異質のものである。SUMMARY OF THE INVENTION The inventors of the present invention have conducted research on a seal structure which achieves both pressure-tightness and easy-peeling performance, which are considered to be contradictory performances in the prior art. It has been confirmed that if sufficiently small concave portions are formed, the seal can be opened through smooth delamination without deteriorating the sealing property, and a seal structure having a good appearance after opening can be formed. The present invention has been developed based on the above findings, and has as its object to provide a sealed container having a smooth easy-open property while maintaining stable pressure resistance. An attempt to form a mesh-like unevenness on the surface of the flange portion to improve the bonding adhesion with the lid material is disclosed in Japanese Utility Model Laid-Open No. 1-110120, but the pattern formed on the flange portion in the present invention is as follows. A wedge-shaped recess,
Further, they are different from these prior arts in that easy opening property is an issue.
【０００５】[0005]
【課題を解決するための手段】本発明は、シール層とそ
れに相対する隣接層とのラミネート強度が３００〜２０
００ｇ／２５ｍｍ、シール層の厚みが１０〜７０μｍで
ある２層以上の多層シートからなるフランジ部を有する
容器本体であって、該フランジ部全面もしくは一部の周
面に深さ１００〜３００μｍ、先端の角度が６０°〜１
００°の楔状の凹部を１ｃｍ2当たり６００〜１５００
個形成された容器本体に蓋材を、容器本体のシール層と
蓋材のシール層間のシール強度が容器本体のシール層と
隣接層のラミネート強度以上になるようにシールしてな
る易開封性密封容器であり、シール層とそれに相対する
隣接層とのラミネート強度が３００〜２０００ｇ／２５
ｍｍ、シール層の厚みが１０〜７０μｍである２層以上
の多層シートからなるフランジ部を有する容器本体を圧
空成形で製造する方法であって、フランジ部全面もしく
は一部の周面に深さ１００〜３００μｍ、先端の角度が
６０°〜１００°の楔状の凹部を１ｃｍ2当たり６００
〜１５００個形成させるための楔状凸部を設けたフラン
ジ押さえに使用されるロケータを使用して、該多層シー
トを圧空成形し、成形中に転写させることによりフラン
ジ部に楔状の凹部を形成させる易開封性密封容器用容器
本体の製造方法である。According to the present invention, the lamination strength between the sealing layer and the adjacent layer opposed thereto is 300 to 20.
A container body having a flange portion composed of a multilayer sheet of two or more layers having a thickness of 100 g / 25 mm and a seal layer of 10 to 70 μm, and having a depth of 100 to 300 μm on the entire or partial peripheral surface of the flange portion. Angle is 60 ° ~ 1
A wedge-shaped recess of 00 ° is 600 to 1500 per cm 2
A lid material is sealed on the individually formed container body so that the sealing strength between the sealing layer of the container body and the sealing layer of the lid material is equal to or higher than the lamination strength of the sealing layer of the container body and the adjacent layer. A container having a laminate strength of 300 to 2000 g / 25 between a sealing layer and an adjacent layer facing the sealing layer.
This method is for producing a container body having a flange portion composed of two or more multilayer sheets having a thickness of 10 to 70 μm and a seal layer having a thickness of 10 to 70 μm by air pressure molding. ３００300 μm, wedge-shaped concave portions with a tip angle of 60 ° to 100 ° are 600 per cm 2.
Using a locator used for a flange holder provided with a wedge-shaped convex portion for forming up to 1500 pieces, the multilayer sheet is pressure-formed and transferred during the molding to easily form a wedge-shaped concave portion in the flange portion. This is a method for producing a container body for an openable sealed container.
【０００６】[0006]
【発明の実施の形態】以下、本発明を図面に沿って詳細
に説明する。図１は、本発明の易開封性密封容器を示し
た断面図で、１はフランジ部２を備える容器本体、３は
前記フランジ部２に接着された蓋材である。容器本体１
は、シール層４とそれに相対する隣接層５を少なくとも
有する多層シートからなる。多層シートの材質構成は、
例えばシール層４にポリエチレン系樹脂、隣接層５にポ
リプロピレン系樹脂を配した単なる２層シートでもよ
く、更にこの隣接層に接着層を介してエチレン酢酸ビニ
ル共重合体けん化物またはポリ塩化ビニリデン系樹脂の
バリア層、接着層およびポリプロピレンの最外層をラミ
ネートした６層のシートとすることもできる。場合によ
っては、多層シートの外層や中間層に金属、紙、セラミ
ックスなどの他材料を積層したものでも差し支えない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an easily-openable sealed container according to the present invention. Reference numeral 1 denotes a container main body having a flange portion 2, and reference numeral 3 denotes a lid member adhered to the flange portion 2. Container body 1
Consists of a multilayer sheet having at least a sealing layer 4 and an adjacent layer 5 facing it. The material composition of the multilayer sheet is
For example, a simple two-layer sheet in which a polyethylene resin is disposed in the seal layer 4 and a polypropylene resin is disposed in the adjacent layer 5 may be used. Further, a saponified ethylene vinyl acetate copolymer or a polyvinylidene chloride resin may be provided on the adjacent layer via an adhesive layer. 6 sheets in which the barrier layer, the adhesive layer and the outermost layer of polypropylene are laminated. Depending on the case, a material obtained by laminating other materials such as metal, paper, and ceramics on the outer layer or the intermediate layer of the multilayer sheet may be used.
【０００７】これら容器本体１を構成する多層シート
は、シール層４と隣接層５の間のラミネート強度が３０
０〜２０００ｇ／２５ｍｍ（剥離角度１８０°、剥離速
度２００ｍｍ／ｍｉｎ．測定時）であり、シール層４の
厚さが１０〜７０μｍの範囲にあることが要件となる。
この理由は、前記ラミネート強度が３００ｇ／２５ｍｍ
を下廻り、またシート層厚さが１０μｍ未満であると十
分な密封性を確保することができず、他方、ラミネート
強度が２０００ｇ／２５ｍｍを越え、シート厚さが７０
μｍを上廻ると開封時の剥離抵抗が大きくなって、円滑
なピール性が損なわれるからである。The multilayer sheet constituting the container body 1 has a lamination strength between the sealing layer 4 and the adjacent layer 5 of 30.
0 to 2000 g / 25 mm (when the peeling angle is 180 ° and the peeling speed is 200 mm / min.), And the thickness of the sealing layer 4 is required to be in the range of 10 to 70 μm.
The reason is that the lamination strength is 300 g / 25 mm
If the thickness is less than 10 μm and the sheet layer thickness is less than 10 μm, sufficient sealing properties cannot be secured, while the lamination strength exceeds 2000 g / 25 mm and the sheet thickness is 70 μm or less.
If the thickness exceeds μm, the peel resistance at the time of opening becomes large, and the smooth peelability is impaired.
【０００８】蓋材３を形成するフィルムは、容器本体の
シール層４と強固に密着する材質のシーラント層６を有
することが望ましく、最も好適な態様は蓋材のシーラン
ト層６を容器本体のシール層４と同一の樹脂材料で構成
することである。この蓋材３フィルムは単層であっても
良いが、バリア性の良好なアルミ箔またはプラスチック
材料を組み合わせた多層構成とすることもできる。It is desirable that the film forming the lid member 3 has a sealant layer 6 of a material that firmly adheres to the seal layer 4 of the container main body. The layer 4 is made of the same resin material. The lid material 3 film may be a single layer, or may be a multilayer structure combining aluminum foil or a plastic material having good barrier properties.
【０００９】容器本体１を形成するフランジ部２のシー
ル層面には、微小凹部７が形成されている。該微小凹部
７は、図２（容器の平面図）および図３（フランジ部の
拡大断面図）に示すようにシール層の全面に形成されて
か、図４（フランジ部の拡大断面図）に例示されるよう
な一部の周面に形成される。図５は微小凹部の拡大図で
あり先端の角度θは６０〜１００°、深さＨは１００〜
３００μｍ、凹部の密度は６００〜１５００個／ｃｍ2
であることが必要である。６００個未満ではシール層の
破断後シール層が延びてヒゲ状になり良好な外観が得ら
れず、１５００個を超えるとシール層の切断を有効に行
えないからである。A small concave portion 7 is formed on the seal layer surface of the flange portion 2 forming the container body 1. The minute concave portion 7 is formed on the entire surface of the sealing layer as shown in FIG. 2 (plan view of the container) and FIG. 3 (enlarged sectional view of the flange portion), or is formed in FIG. 4 (enlarged sectional view of the flange portion). It is formed on a part of the peripheral surface as illustrated. FIG. 5 is an enlarged view of the minute concave portion. The angle θ of the tip is 60 to 100 °, and the depth H is 100 to 100 °.
300 μm, density of concave portions is 600 to 1500 / cm 2
It is necessary to be. If the number is less than 600, the seal layer is stretched after the breakage of the seal layer to form a whisker and a good appearance is not obtained. If the number exceeds 1500, the seal layer cannot be effectively cut.
【００１０】微小凹部７は、圧空成型においてあらかじ
め加工を施したロケーターによりフランジ押さえを行い
転写させることにより形成する。図７はその様子を示し
ており、（ａ）は圧着前、（ｂ）は圧着中、（ｃ）は圧
着後を示す。図（ａ）において金型９とロケータ８の隙
間は開いておりその間に加熱溶融されたシートが供給さ
れる、次に図（ｂ）のごとく圧空によりシート１０を金
型９に沿わせ容器形状を形成すると同時にロケータ８は
シート１０に圧着され、成形を完了すると図（ｃ）の様
にロケータ８は開く。このときロケータにあらかじめ加
工されていた凸形状１１が容器のフランジ部に転写し微
少凹部７が形成される。[0010] The minute concave portion 7 is formed by pressing and transferring a flange by using a locator which has been processed in advance in pressure molding. FIGS. 7A and 7B show this state, in which FIG. 7A shows the state before crimping, FIG. 7B shows the state during crimping, and FIG. 7C shows the state after crimping. In FIG. 5A, the gap between the mold 9 and the locator 8 is open, and the sheet melted by heating is supplied between them. Next, as shown in FIG. Is formed, the locator 8 is pressed against the sheet 10, and when the molding is completed, the locator 8 is opened as shown in FIG. At this time, the convex shape 11 processed in advance on the locator is transferred to the flange portion of the container, and the minute concave portion 7 is formed.
【００１１】本発明のシール構造は、上記のシール層面
に無数の微小凹部７を形成した容器本体１のフランジ部
２と蓋材３のシーラント層６を重ね合わせて接着するこ
とにより形成されるが、この場合の条件はシール層面と
蓋材シーラント層間のシール強度が容器本体のシール層
４と隣接層５とのラミネート強度以上になる状態にする
ことである。接着の方法としては、例えばヒートシー
ル、超音波シール、高周波シール等が代表的なシール手
段となる。The seal structure of the present invention is formed by laminating and bonding the sealant layer 6 of the lid 3 and the flange portion 2 of the container body 1 having the innumerable minute recesses 7 formed on the surface of the seal layer. In this case, the condition is that the sealing strength between the sealing layer surface and the cover material sealant layer be higher than the lamination strength of the sealing layer 4 and the adjacent layer 5 of the container body. As a bonding method, for example, heat sealing, ultrasonic sealing, high-frequency sealing, and the like are typical sealing means.
【００１２】本発明によるシール構造は、図６に示した
ように蓋材３のシーラント層とフランジ部２のシール層
とが強固に接着した状態で一体となって微小凹部７内に
充填した形態を呈する。したがって、一体化したシール
層には一定範囲内において層の厚薄ならびにシール強度
の強弱が分布した独特の構造となっている。このシール
構造が、密封時には内圧、外圧に対して安定した耐圧性
をもたらし、開封時には円滑な層間剥離を進行させるた
めに機能する。開封時の層間剥離は、第６図の一点破線
で示したように蓋材３を上方に引っ張り上げるとフラン
ジ部の隣接層５と一体化シール層４との層間から剥離が
進行するが、前記した層の厚薄ならびにシール強弱の連
続的な分布が剥離の抵抗感を軽減するために有効機能し
て極めて良好なピール感覚による円滑な開封化を実現す
る。最終的な開封は、フランジ部の最内層に介在する薄
いシール層部（Ａ部）を破壊分離して完全に開口するが
微小な凹部がシール層の破壊を助ける働きをする。The seal structure according to the present invention is such that the sealant layer of the cover member 3 and the seal layer of the flange portion 2 are tightly adhered to each other and are integrally filled in the minute recess 7 as shown in FIG. Present. Therefore, the integrated seal layer has a unique structure in which the thickness of the layer and the strength of the seal are distributed within a certain range. This sealing structure functions to provide stable pressure resistance against internal pressure and external pressure during sealing, and to promote smooth delamination during opening. When the lid material 3 is pulled upward as shown by the dashed line in FIG. 6, the delamination at the time of opening is progressed from the interlayer between the adjacent layer 5 of the flange portion and the integrated sealing layer 4. The thickness of the layer and the continuous distribution of the strength of the seal function effectively to reduce the resistance to peeling, thereby realizing smooth opening with an extremely good peel feeling. In the final opening, the thin seal layer portion (portion A) interposed in the innermost layer of the flange portion is broken and separated to completely open, but the minute concave portion serves to assist the breakage of the seal layer.
【００１３】[0013]
【実施例】以下に本発明の実施例を比較例と対比して説
明する。 《実施例１》全体の厚さが８５０μｍで、シール層の材
質が密度０．９５５、メルトインデックス（ＭＩ）５ｇ
／１０ｍｉｎ．の高密度ポリエチレン（ＨＤＰＥ）、隣
接層（外層を兼ねる）はメルトインデックス（ＭＩ）
０．５ｇ／ｍｉｎ．のポリプロピレン（ＰＰ）からなる
２層シートを共押出して作製した。ついで、このシート
を圧空成形し、内径６５ｍｍ、フランジ部外径７５ｍ
ｍ、高さ２５ｍｍの容器本体を得た。この際フランジ部
のシール層面に深さ１５０μｍ先端角度４５°の楔状溝
を約９００個／ｃｍ2の密度でロケータで圧着する事に
より形成した。この容器本体のシール層の厚さは２０μ
ｍ、シール層と隣接層とのラミネート強度は１５００ｇ
／２５ｍｍであった。蓋材として、容器のシール層と同
一のポリエチレン（厚さ５０μｍ）をシーラント層と
し、これに延伸ナイロン（厚さ３０μｍ）をドライラミ
ネートしたものを用いた。容器フランジ部のシール層面
に蓋材のシーラント層を重ね、面圧２Ｋｇ／ｃｍ２、温
度１９０℃、時間１．０秒の条件で２回に亘ってヒート
シールし、本発明の易開封性密封容器を得た。得られた
５０個の密封容器につき蓋を開封したところ、全ての容
器が抵抗のないピール感で最後まで円滑に開口分離し、
開封面の状態も毛羽立ち、変形等の現象は認められず良
好であった。また、蓋材の中央に粘着性のゴム板（厚さ
１．５ｍｍ）を貼りつけ、注射針を差込んで２ｃｃ／秒
の速度で空気を圧入した際のパンク圧を測定した。その
結果を、開封性能と併せて表１に示した。EXAMPLES Examples of the present invention will be described below in comparison with comparative examples. Example 1 The overall thickness was 850 μm, the material of the sealing layer was 0.955, and the melt index (MI) was 5 g.
/ 10 min. High-density polyethylene (HDPE), adjacent layer (also serving as outer layer) is melt index (MI)
0.5 g / min. Was produced by co-extrusion of a two-layer sheet made of polypropylene (PP). Then, the sheet was pressure-formed to have an inner diameter of 65 mm and an outer diameter of 75 m for the flange portion.
m, and a container body having a height of 25 mm were obtained. At this time, a wedge-shaped groove having a depth of 150 μm and a tip angle of 45 ° was formed on the surface of the seal layer of the flange portion by crimping with a locator at a density of about 900 / cm 2 . The thickness of the sealing layer of the container body is 20μ.
m, lamination strength between seal layer and adjacent layer is 1500 g
/ 25 mm. As the lid material, the same polyethylene (thickness: 50 μm) as the seal layer of the container was used as the sealant layer, and stretched nylon (thickness: 30 μm) was dry-laminated to the sealant layer. The sealant layer of the lid material is superimposed on the seal layer surface of the container flange portion, and heat-sealed twice under the conditions of a surface pressure of 2 kg / cm 2 , a temperature of 190 ° C., and a time of 1.0 second. A container was obtained. When the lids were opened for the obtained 50 sealed containers, all the containers were smoothly opened and separated to the end with a peeling feeling without resistance,
The state of the unsealing surface was good, with no fluffing or deformation. Further, an adhesive rubber plate (1.5 mm thick) was attached to the center of the lid material, and a puncture pressure was measured when an injection needle was inserted and air was injected at a speed of 2 cc / sec. The results are shown in Table 1 together with the opening performance.
【００１４】《比較例１》実施例１で得た容器と同型状
でフランジのシール面が平坦な容器を作成し、フランジ
面に、フランジ部と容器側面部の境界面から周縁外側に
向かって１ｍｍの位置に深さ２５μｍの切り欠きを全周
加工した。 《比較例２》実施例１で得た容器と同型状でフランジの
シール面が平坦な容器を作成し、突起数が２５６個／ｃ
ｍ２の超音波ホーンを当てて超音波処理を行い全域に微
小凹部を形成した。比較例１及び２で作成した容器本体
に実施例と同一の蓋材を同様の条件によりヒートシール
して密封容器を作製した。この容器（各５０個）につい
て測定したパンク圧および開封性能を表１に併載した。
表１の結果から、本発明の易開封性密封容器は比較例１
に比べ耐圧性は若干低下するものの、そのバラツキ巾が
少ないために安定しており、開封性能では大幅に優れる
結果を示した。また比較例２に対してはほぼ同等の性能
が得られた上に開封後の外観が良好である。Comparative Example 1 A container having the same shape as that of the container obtained in Example 1 and having a flat flange sealing surface was prepared, and the flange surface was arranged from the boundary between the flange portion and the container side surface toward the outer periphery. A notch having a depth of 25 μm was formed at a position of 1 mm all around. << Comparative Example 2 >> A container having the same shape as the container obtained in Example 1 and having a flat flange sealing surface was prepared, and the number of projections was 256 / c.
to form fine recesses in whole subjected to ultrasonic treatment by applying an ultrasonic horn of m 2. The same lid material as in the example was heat-sealed to the container body prepared in Comparative Examples 1 and 2 under the same conditions to produce a sealed container. The puncture pressure and opening performance measured for these containers (50 each) are also shown in Table 1.
From the results in Table 1, the easily-openable sealed container of the present invention was obtained in Comparative Example 1.
Although the pressure resistance was slightly lowered as compared with the above, the dispersion was small and the stability was stable, and the opening performance was excellent. Further, in comparison with Comparative Example 2, almost the same performance was obtained, and the appearance after opening was good.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】本発明によればシール層面に無数の十分
微小な凹部が形成された容器本体のフランジ部を介入し
て蓋材を接着するシール構造により、常に安定した耐圧
密封性を保持しながら円滑なピール感で容易に蓋を開封
することが保護され、さらに開封後の外観が良好であ
る。したがって、あらゆる種類の食品類を包装するため
の高品質な易開封性密封容器を提供することができる。According to the present invention, a stable pressure-resistant sealing property is always maintained by a sealing structure in which a lid member is adhered by interposing a flange portion of a container body having an infinite number of minute concave portions formed on a sealing layer surface. However, the lid is easily opened with a smooth peeling feeling, and the appearance after opening is good. Therefore, it is possible to provide a high-quality easily-openable sealed container for packaging all kinds of foods.
【図１】本発明の易開封性密封容器の構成の一実施例を
示した断面図FIG. 1 is a sectional view showing an embodiment of the configuration of an easily-openable sealed container according to the present invention.
【図２】本発明の易開封性密封容器の蓋を半開封した状
態を示した容器の平面図FIG. 2 is a plan view of the easily opened sealable container according to the present invention in a state in which a lid is half-opened.
【図３】本発明の容器本体のフランジ部分の一実施例の
拡大断面図FIG. 3 is an enlarged sectional view of one embodiment of a flange portion of the container body of the present invention.
【図４】本発明の容器本体のフランジ部分の他の実施例
の拡大断面図FIG. 4 is an enlarged sectional view of another embodiment of the flange portion of the container body of the present invention.
【図５】本発明の容器本体のフランジ部分の楔状凹部の
拡大断面図FIG. 5 is an enlarged sectional view of a wedge-shaped concave portion of a flange portion of the container body of the present invention.
【図６】本発明の易開封性密封容器の開封状態を示した
フランジ部の拡大断面図FIG. 6 is an enlarged cross-sectional view of a flange portion showing an opened state of the easily-openable sealed container of the present invention.
【図７】本発明の易開封性密封容器の製造方法の概略図 （ａ）は圧着前、（ｂ）は圧着中、（ｃ）は圧着後の様
子を示す。FIGS. 7A and 7B are schematic views of the method for producing an easily-openable sealed container according to the present invention, wherein FIG. 7A shows a state before crimping, FIG. 7B shows a state during crimping, and FIG.
１：容器本体 ２：フランジ部 ３：蓋材 ４：容器本体のシール層 ５：容器本体の隣接層 ６：蓋材のシール層 ７：凹部 ８：ロケータ ９：金型 １０：多層シート １１：凸部 1: Container main body 2: Flange 3: Lid 4: Seal layer of container main body 5: Adjacent layer of container main body 6: Seal layer of lid 7: Concave section 8: Locator 9: Mold 10: Multilayer sheet 11: Convex Department
Claims (2)
ミネート強度が３００〜２０００ｇ／２５ｍｍ、シール
層の厚みが１０〜７０μｍである２層以上の多層シート
からなるフランジ部を有する容器本体であって、該フラ
ンジ部全面もしくは一部の周面に深さ１００〜３００μ
ｍ、先端の角度が６０°〜１００°の楔状の凹部を１ｃ
ｍ2当たり６００〜１５００個形成された容器本体に蓋
材を、容器本体のシール層と蓋材のシール層間のシール
強度が容器本体のシール層と隣接層のラミネート強度以
上になるようにシールしてなることを特徴とする易開封
性密封容器。1. A container body having a flange portion composed of two or more multilayer sheets having a laminate strength of 300 to 2000 g / 25 mm between a seal layer and an adjacent layer opposed thereto and a seal layer having a thickness of 10 to 70 μm. And a depth of 100 to 300 μm on the entire or a part of the peripheral surface of the flange portion.
m, a wedge-shaped recess having a tip angle of 60 ° to 100 ° 1c
The lid material in m 2 per 600 to 1500 pieces formed container body, sealed as sealing strength of the sealing layers of the sealing layer and the lid of the container body is equal to or greater than the laminate strength of the sealing layer and the adjacent layer of the container body An easily openable sealed container, comprising:
ミネート強度が３００〜２０００ｇ／２５ｍｍ、シール
層の厚みが１０〜７０μｍである２層以上の多層シート
からなるフランジ部を有する容器本体を圧空成形で製造
する方法であって、フランジ部全面もしくは一部の周面
に深さ１００〜３００μｍ、先端の角度が６０°〜１０
０°の楔状の凹部を１ｃｍ2当たり６００〜１５００個
形成させるための楔状凸部を設けたフランジ押さえに使
用されるロケータを使用して、該多層シートを圧空成形
し、成形中に転写させることによりフランジ部に楔状の
凹部を形成させることを特徴とする易開封性密封容器用
容器本体の製造方法。2. A container body having a flange portion composed of two or more multilayer sheets having a laminate strength of 300 to 2000 g / 25 mm between a sealing layer and an adjacent layer facing the sealing layer and a thickness of the sealing layer of 10 to 70 μm is compressed. It is a method of manufacturing by molding, wherein the entire flange surface or a part of the peripheral surface has a depth of 100 to 300 μm and a tip angle of 60 ° to 10 °.
The multi-layer sheet is pressure-formed using a locator used for a flange holder provided with a wedge-shaped convex portion for forming 600 to 1500 0-degree wedge-shaped concave portions per 1 cm 2 and transferred during the forming. Forming a wedge-shaped concave portion in the flange portion by using the above method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34032797A JPH11171247A (en) | 1997-12-10 | 1997-12-10 | Easily opening sealed container and manufacture of container main body to be used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34032797A JPH11171247A (en) | 1997-12-10 | 1997-12-10 | Easily opening sealed container and manufacture of container main body to be used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11171247A true JPH11171247A (en) | 1999-06-29 |
Family
ID=18335888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34032797A Pending JPH11171247A (en) | 1997-12-10 | 1997-12-10 | Easily opening sealed container and manufacture of container main body to be used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11171247A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125561A (en) * | 2000-10-31 | 2002-05-08 | Dainippon Jochugiku Co Ltd | Insect-attracting bait container |
| JP2006327650A (en) * | 2005-05-27 | 2006-12-07 | Yoshino Kogyosho Co Ltd | Synthetic resin cup shaped container |
| JP2008265806A (en) * | 2007-04-19 | 2008-11-06 | Oshio Sangyo Kk | Kagami-mochi rice cake container |
| JP2012188172A (en) * | 2012-06-28 | 2012-10-04 | Oshio Sangyo Kk | Container for round rice cake |
| JP2014051322A (en) * | 2013-10-09 | 2014-03-20 | Oshio Sangyo Kk | Kagami-moch container |
-
1997
- 1997-12-10 JP JP34032797A patent/JPH11171247A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002125561A (en) * | 2000-10-31 | 2002-05-08 | Dainippon Jochugiku Co Ltd | Insect-attracting bait container |
| JP2006327650A (en) * | 2005-05-27 | 2006-12-07 | Yoshino Kogyosho Co Ltd | Synthetic resin cup shaped container |
| JP4725886B2 (en) * | 2005-05-27 | 2011-07-13 | 株式会社吉野工業所 | Synthetic resin cup-shaped container |
| JP2008265806A (en) * | 2007-04-19 | 2008-11-06 | Oshio Sangyo Kk | Kagami-mochi rice cake container |
| JP2012188172A (en) * | 2012-06-28 | 2012-10-04 | Oshio Sangyo Kk | Container for round rice cake |
| JP2014051322A (en) * | 2013-10-09 | 2014-03-20 | Oshio Sangyo Kk | Kagami-moch container |
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