JP4655396B2 - Manufacturing method of cup-shaped container - Google Patents
Manufacturing method of cup-shaped container Download PDFInfo
- Publication number
- JP4655396B2 JP4655396B2 JP2001092294A JP2001092294A JP4655396B2 JP 4655396 B2 JP4655396 B2 JP 4655396B2 JP 2001092294 A JP2001092294 A JP 2001092294A JP 2001092294 A JP2001092294 A JP 2001092294A JP 4655396 B2 JP4655396 B2 JP 4655396B2
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- layer
- cup
- heat
- container body
- shaped container
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- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、イージーピール（易剥離）可能なシート状蓋材で封止され、食品などの内容物において広い用途範囲で使用されているカップ状容器に関するものである。
【０００２】
【従来の技術】
従来、カップ状容器（１０）としては、図２に示すように、射出成形法で作製された容器本体（１００）に、内容物を充填したのち、胴部（１１０）の上端のフランジ（１２０）の上面に、シート状蓋材（２００）をイージーピール可能にヒートシール法で熱融着して封止したものが使用されていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述した従来のカップ状容器においては、容器本体の材質によって、シート状蓋材の最下面層のイージーピール性熱融着樹脂（シーラント）層の材質を選定し、さらに、容器としての要求品質によっても材質を選定しなければならないため、材質の選定範囲が極めて限定されていた。
【０００４】
本発明は、上述の従来の問題を解決するものであり、容器本体の材質には関係なしに、蓋材との融着性に関する要求品質に応じて、イージーピール性熱融着樹脂層の材質を選定できるカップ状容器及びその製造方法を提供するものである。
【０００５】
【課題を解決するための手段】
すなわち本発明の第１の発明は、容器本体の胴部上端に設けられたフランジ上面に、シート状蓋材をイージーピール可能に接着して封止するカップ状容器の製造方法において、予め、容器本体を成形する射出成形用金型の雄型のフランジの上面を形成するキャビティ面に、最上面層がイージーピール性熱融着樹脂層で最下面層が熱融着樹脂層である環状熱融着シートを、上面をキャビティ面に当接させて挿着し、該環状熱融着シートの下面を、容器本体を成形すると同時に、該容器本体のフランジ上面に熱融着し、前記容器本体のフランジの上面に環状熱融着シート層を形成することを特徴とするカップ状容器の製造方法である。
【０００６】
次に、本発明の第２の発明は、第１の発明に記載のカップ状容器の製造方法において、前記環状熱融着シート層の中間層が、熱可塑性樹脂層からなる基材層であることを特徴とするカップ状容器の製造方法である。
【０００７】
次に、本発明の第３の発明は、第１の発明に記載のカップ状容器の製造方法において、前記環状熱融着シート層の中間層が、熱可塑性樹脂層とバリア層からなる積層基材層であることを特徴とするカップ状容器の製造方法である。
【００１０】
【発明の実施の形態】
本発明のカップ状容器（１０）は、図１（ａ）に示すように、内容物を充填したのち、容器本体（１００）の胴部（１１０）上端に設けられたフランジ（１２０）上面に、通常、開封用つまみ（２１０）をもつシート状蓋材（２００）をイージーピール可能に接着して封止する容器であるが、容器本体（１００）のフランジ（１２０）上面に環状熱融着シート層（３００）を設けており、この環状熱融着シート層の上面に、シート状蓋材（２００）をイージーピール可能にヒートシール法などにより熱融着するものである。
【００１１】
そして、上述の環状熱融着シート層（３００）は、図１（ｂ）に示すように、積層構造をとり、その最上面層は、シート状蓋材に対してイージーピール可能に熱融着するイージーピール性熱融着樹脂層（３１０）であり、また、最下面層は、容器本体に対して熱融着する熱融着樹脂層（３３０）である。
【００１２】
また、環状熱融着シート層（３００）は、図１（ｂ）に示すように、一般的に、中間層として基材層（３２０）を設けており、この基材層は、通常では、ポリエチレンテレフタレート、ポリプロピレン、ポリエチレンなどの熱可塑性樹脂層など単層及び積層、または、容器にバリア性が強く求められる場合には、ポリエチレンテレフタレート、ポリプロピレン、ポリエチレンなどの熱可塑性樹脂層とアルミニウム箔、無機蒸着ポリエチレンテレフタレートフィルム、ポリ塩化ビニリデンコート延伸ポリプロピレンフィルムなどのバリア層とを積層したものである。
【００１３】
そして、本発明のカップ状容器の容器本体の製造方法は、いわゆるインサート射出成形法によるものであり、前もって、容器本体を成形する射出成形用金型の雄型のフランジの上面を形成するキャビティ面に、最上面層がイージーピール性熱融着樹脂層で最下面層が熱融着樹脂層である環状熱融着シートを、上面をキャビティ面に当接させて挿着し、射出成形機でゲート（溶融樹脂が射出される湯口）より金型キャビティ（成形品が成形される雌型と雄型の間の空間）内へ溶融成形樹脂を射出して、容器本体を成形すると同時に、図１（ａ）に示すように、環状熱融着シートの下面を、容器本体（１００）のフランジ（１２０）上面に熱融着して、容器本体のフランジの上面に、環状熱融着シート層（３００）を形成するものである。なお、容器本体の成形材料としては、ポリプロピレン、ポリエチレン、ポリエチレンテレフタレート、ポリエチレンナフタレートなど熱可塑性樹脂を容器の使用目的に合わせて選択して使用するものである。
【００１４】
本発明のカップ状容器の容器本体のフランジ上面には、環状熱融着シート層が形成されており、この環状熱融着シート層の最上面層が、シート状蓋材に対してイージーピール可能に熱融着するイージーピール性熱融着樹脂層であり、このイージーピール性熱融着樹脂層は、容器本体の材質には関係なしに、蓋材との融着性に関する要求品質に応じて選定するものであるので、イージーピール性熱融着樹脂の選択幅が広くなる。
【００１５】
【発明の効果】
本発明の製造方法によるカップ状容器は、容器本体のフランジ上面に、蓋材をイージーピール可能に熱融着するイージーピール性熱融着樹脂層を最上面にもつ環状熱融着シート層が形成されており、容器本体の材質には関係なしに、蓋材との融着性に関する要求品質に応じて、イージーピール性熱融着樹脂層の材質を選定できるので、イージーピール性熱融着樹脂の選定範囲幅が、従来のカップ状容器の場合と比較して、著しく広くなる。
【図面の簡単な説明】
【図１】（ａ）は、本発明の一実施形態のカップ状容器の構造を示す説明図であり、（ｂ）は、そのＡ部分の拡大図である。
【図２】従来の一例のカップ状容器の構造を示す説明図である。
【符号の説明】
１０……カップ状容器
１００……容器本体
１１０……胴部
１２０……フランジ
２００……シート状蓋材
２１０……開封用つまみ
３００……環状熱融着シート層
３１０……イージーピール性熱融着樹脂層
３２０……基材層
３３０……熱融着樹脂層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cup-shaped container that is sealed with an easy-peelable (easily peelable) sheet-like lid material and is used in a wide range of applications in contents such as food.
[0002]
[Prior art]
Conventionally, as shown in FIG. 2, as a cup-shaped container (10), after filling a container main body (100) produced by an injection molding method with contents, a flange (120 at the upper end of a trunk (110) ), And a sheet-like lid material (200) was heat-sealed and sealed by a heat seal method so that it could be easily peeled.
[0003]
[Problems to be solved by the invention]
However, in the conventional cup-shaped container described above, the material of the easy-peelable heat-sealing resin (sealant) layer of the lowermost layer of the sheet-like lid material is selected according to the material of the container body, and further, the requirements as a container Since the material must be selected depending on the quality, the selection range of the material is extremely limited.
[0004]
The present invention solves the above-described conventional problems, and regardless of the material of the container body, the material of the easy-peeling heat-sealing resin layer according to the required quality related to the fusing property with the lid material. The cup-shaped container which can select can be provided, and its manufacturing method.
[0005]
[Means for Solving the Problems]
That is, according to a first aspect of the present invention, there is provided a cup-shaped container manufacturing method in which a sheet-like lid material is adhered and sealed to an upper surface of a flange provided at the upper end of a body portion of a container main body so as to be easily peeled. On the cavity surface that forms the upper surface of the male flange of the injection mold that molds the main body, an annular heat fusion with the uppermost layer being an easy-peeling heat-fusing resin layer and the lowermost layer being a heat-fusing resin layer The adhesive sheet is inserted with the upper surface in contact with the cavity surface, and the lower surface of the annular heat-sealing sheet is heat-sealed to the upper surface of the flange of the container body at the same time as the container body is molded. An annular heat-sealing sheet layer is formed on the upper surface of a flange.
[0006]
Next, according to a second aspect of the present invention, in the method for manufacturing a cup-shaped container according to the first aspect, the intermediate layer of the annular heat-sealing sheet layer is a base material layer made of a thermoplastic resin layer. This is a method for producing a cup-shaped container.
[0007]
Next, a third invention of the present invention is the method for producing a cup-shaped container according to the first invention, wherein the intermediate layer of the annular heat-sealing sheet layer is a laminated group comprising a thermoplastic resin layer and a barrier layer. It is a manufacturing method of the cup-shaped container characterized by being a material layer .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1 (a), the cup-shaped container (10) of the present invention is filled with the contents, and then placed on the upper surface of the flange (120) provided at the upper end of the trunk (110) of the container body (100). Usually, a container in which a sheet-like lid member (200) having an opening knob (210) is adhered and sealed in an easy peelable manner, but is annular heat-sealed to the upper surface of the flange (120) of the container body (100). A sheet layer (300) is provided, and the sheet-like lid material (200) is heat-sealed on the upper surface of the annular heat-sealing sheet layer by a heat seal method or the like so that it can be easily peeled.
[0011]
The annular heat-sealing sheet layer (300) has a laminated structure as shown in FIG. 1 (b), and its uppermost layer is heat-sealed so that it can be easily peeled to the sheet-like lid material. This is an easy-peeling heat-sealing resin layer (310), and the lowermost layer is a heat-sealing resin layer (330) that is heat-sealed to the container body.
[0012]
Further, as shown in FIG. 1B, the annular heat-sealing sheet layer (300) is generally provided with a base material layer (320) as an intermediate layer. Single layers and laminates such as polyethylene terephthalate, polypropylene, polyethylene and other thermoplastic resin layers, or thermoplastic containers such as polyethylene terephthalate, polypropylene, polyethylene, aluminum foil, inorganic vapor deposition, etc. A barrier layer such as a polyethylene terephthalate film or a polyvinylidene chloride-coated stretched polypropylene film is laminated.
[0013]
And the manufacturing method of the container main body of the cup-shaped container of the present invention is based on the so-called insert injection molding method, and the cavity surface that forms the upper surface of the male mold flange of the injection mold for molding the container main body in advance. In addition, an annular heat-sealing sheet whose uppermost layer is an easy-peeling heat-fusible resin layer and whose lowermost layer is a heat-fusible resin layer is inserted with the upper surface in contact with the cavity surface, At the same time as molding the container body by injecting the molten molding resin into the mold cavity (the space between the female mold and the male mold in which the molded product is molded) from the gate (pouring gate where the molten resin is injected). As shown in (a), the lower surface of the annular heat-sealing sheet is heat-sealed to the upper surface of the flange (120) of the container body (100), and the annular heat-sealing sheet layer ( 300). In addition, as a molding material of the container body, a thermoplastic resin such as polypropylene, polyethylene, polyethylene terephthalate, polyethylene naphthalate is selected and used in accordance with the purpose of use of the container.
[0014]
An annular heat-sealing sheet layer is formed on the upper surface of the flange of the container body of the cup-shaped container of the present invention, and the uppermost layer of the annular heat-sealing sheet layer can be easily peeled to the sheet-like lid material. It is an easy-peeling heat-sealing resin layer that is heat-sealed to the outside, and this easy-peeling heat-sealing resin layer is used regardless of the material of the container body. Since the selection is made, the selection range of the easy-peeling heat-sealing resin is widened.
[0015]
【The invention's effect】
In the cup-shaped container according to the manufacturing method of the present invention, an annular heat-sealing sheet layer having an easy-peeling heat-sealing resin layer on the top surface is formed on the upper surface of the flange of the container body so that the cover material can be easily peeled. Because the material of the easy-peeling heat-sealing resin layer can be selected according to the required quality related to the fusibility with the lid, regardless of the material of the container body, the easy-peeling heat-sealing resin The range of the selected range is remarkably wide as compared with the conventional cup-shaped container.
[Brief description of the drawings]
FIG. 1 (a) is an explanatory view showing the structure of a cup-shaped container according to one embodiment of the present invention, and FIG. 1 (b) is an enlarged view of a portion A thereof.
FIG. 2 is an explanatory view showing a structure of a conventional cup-shaped container.
[Explanation of symbols]
DESCRIPTION OF
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001092294A JP4655396B2 (en) | 2001-03-28 | 2001-03-28 | Manufacturing method of cup-shaped container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001092294A JP4655396B2 (en) | 2001-03-28 | 2001-03-28 | Manufacturing method of cup-shaped container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002284235A JP2002284235A (en) | 2002-10-03 |
| JP4655396B2 true JP4655396B2 (en) | 2011-03-23 |
Family
ID=18946781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001092294A Expired - Fee Related JP4655396B2 (en) | 2001-03-28 | 2001-03-28 | Manufacturing method of cup-shaped container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4655396B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011230818A (en) * | 2010-04-30 | 2011-11-17 | Toppan Printing Co Ltd | Hermetic container |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109873A (en) * | 1988-10-15 | 1990-04-23 | Ueno Hiroshi | Easy opening sealing container and its manufacture |
| JPH1129173A (en) * | 1997-07-11 | 1999-02-02 | Dainippon Printing Co Ltd | Easily openable sealed vessel and its preparation |
-
2001
- 2001-03-28 JP JP2001092294A patent/JP4655396B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109873A (en) * | 1988-10-15 | 1990-04-23 | Ueno Hiroshi | Easy opening sealing container and its manufacture |
| JPH1129173A (en) * | 1997-07-11 | 1999-02-02 | Dainippon Printing Co Ltd | Easily openable sealed vessel and its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002284235A (en) | 2002-10-03 |
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