JP2005289425A - Hermetic container manufacturing method - Google Patents

Hermetic container manufacturing method Download PDF

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JP2005289425A
JP2005289425A JP2004105401A JP2004105401A JP2005289425A JP 2005289425 A JP2005289425 A JP 2005289425A JP 2004105401 A JP2004105401 A JP 2004105401A JP 2004105401 A JP2004105401 A JP 2004105401A JP 2005289425 A JP2005289425 A JP 2005289425A
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lid
inner lid
heat
container
outer lid
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JP4506241B2 (en
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Yasushi Hatano
靖 波多野
Hideo Kawasaki
秀夫 川崎
Masato Kogure
正人 小暮
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Toyo Seikan Group Holdings Ltd
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Toyo Seikan Kaisha Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic container manufacturing method capable of absorbing changes in the internal pressure of the container in an extensive temperature range, ensuring sealability, and providing functions such as drop resistance, appearance suitability, easy unsealability, or the like. <P>SOLUTION: The hermetic container manufacturing method in which a lid consisting of two layers to form an inner lid and an outer lid is heat-sealed to a container body filled with contents includes (i) an uncoiling step of uncoiling the lid consisting of the two layers, (ii) a peeling step of peeling the lid consisting of the two layers into an inner lid material and an outer lid material, (iii) an inner lid heat-sealing step of heat-sealing the inner lid material to a flange part of the container body, (iv) an outer lid heat-sealing step of overlapping the outer lid material on the inner lid material and heat-sealing the outer lid material, and (v) a trimming step of cutting off other portions than the inner lid and the outer lid. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、内容物が充填された密封容器の製造方法に関する。より詳細には2層からなる蓋材を内蓋材と外蓋材とに剥離して、内蓋材を容器本体のフランジ部に、また、外蓋材を内蓋に重ね合わせてヒートシールする内容物が充填された密封容器の製造方法に関する。   The present invention relates to a method for manufacturing a sealed container filled with contents. More specifically, the two-layer lid material is peeled into an inner lid material and an outer lid material, and the inner lid material is overlaid on the flange portion of the container body, and the outer lid material is overlaid on the inner lid and heat sealed. The present invention relates to a method for manufacturing a sealed container filled with contents.

従来、合成樹脂等から成るカップ状乃至トレー状の容器は、前記容器とヒートシール性を有するフィルム、シートから成るシール蓋により密封され、食品、飲料等の内容物の流通・保存を目的として広く使用されてきた。また、このような容器において、ヒートシール部を引き剥がして開封できるようにした容器は、易開封性容器として好んで使用されてきた。
そして、このような容器の包装方法として、層間剥離を生じやすい構成の共押出しフィルムの層間を2層に連続的に剥離しながら片側のフィルムを容器用フィルムとし、該フィルムを加熱ゾーンで加熱後、成形ゾーンに移動させて容器を連続的に成形後、無菌室に移動させて充填シールする方法が開示されている(特許文献1等)。
Conventionally, cup-shaped or tray-shaped containers made of synthetic resin or the like are sealed with a sealing lid made of the container and a heat-sealable film or sheet, and are widely used for the purpose of distribution and storage of contents such as food and beverages. Have been used. Moreover, in such a container, a container that can be opened by peeling off the heat seal portion has been used favorably as an easily openable container.
And, as a packaging method for such a container, one side film is used as a container film while continuously peeling the two layers of the coextruded film having a structure that easily causes delamination, and the film is heated in the heating zone. In addition, a method is disclosed in which a container is continuously formed by moving to a forming zone and then moved to an aseptic chamber for filling and sealing (Patent Document 1, etc.).

また、層界面が実質的に生菌の存在しない多層のフィルム又はシートを滅菌工程に導入して滅菌処理をした後、無菌状態に保持した無菌包装装置に導入して、該多層のフィルム又はシートの片面又は両面に積層したフィルムを層界面より連続的に剥離すると共に、前記多層のフィルム又はシートの剥離界面で被包装物を包装する包装方法が知られている(例えば、特許文献2等)。   In addition, a multilayer film or sheet having substantially no viable bacteria at the layer interface is introduced into the sterilization process, sterilized, and then introduced into an aseptic packaging apparatus maintained in a sterile state. A packaging method is known in which a film laminated on one side or both sides is continuously peeled from a layer interface and a package is packaged at the peeling interface of the multilayer film or sheet (for example, Patent Document 2). .

さらに、容器内に品物を充填し、しかる後に該容器本体に殺菌済みの蓋フィルムを被せてシールする無菌包装方法において、品物を充填後の該容器本体を無菌雰囲気内で該品物と同時に加熱により殺菌し、該蓋フィルムの殺菌を該無菌雰囲気内で加熱により行い、該容器本体と該蓋フィルムとを該無菌雰囲気内で仮シールする包装方法が知られている(例えば、特許文献3等)。   Further, in an aseptic packaging method in which a container is filled with an article, and then the container body is covered with a sterilized lid film and sealed, the container body after filling the article is heated simultaneously with the article in a sterile atmosphere. A packaging method is known in which the lid body film is sterilized by heating in the sterile atmosphere, and the container body and the lid film are temporarily sealed in the sterile atmosphere (for example, Patent Document 3). .

特開昭55−97304号公報JP-A-55-97304 特開昭56−151634号公報JP 56-151634 A 特開昭64−37326号公報Japanese Unexamined Patent Publication No. 64-37326

前記した特許文献1乃至3に記載の包装方法は、いずれも容器本体を一層の蓋で単純にシールする方法であるため、充填密封後の流通時のチルドからホットウォーマー等の広い温度域における容器内圧の変化の吸収、密封性の確保、落下耐性、外観適性、易開封性といった機能を付与することができない問題点がある。
本発明は、前記課題を解決し、前記した機能性の付与を容易、確実に行うことができる密封容器の製造方法を提供することを目的とする。
Since all of the packaging methods described in Patent Documents 1 to 3 are methods of simply sealing the container body with a single lid, containers in a wide temperature range such as chilled and hot warmers during distribution after filling and sealing. There are problems in that functions such as absorption of changes in internal pressure, securing of sealing properties, drop resistance, appearance suitability, and easy-openability cannot be provided.
An object of this invention is to provide the manufacturing method of the sealed container which solves the said subject and can perform the above-mentioned functionality easily and reliably.

本発明者らは、鋭意検討した結果、内蓋と外蓋の2層からなる蓋材を剥離して、内蓋材を内容物が充填された容器本体のフランジ部に重ね合わせてヒートシールし、外蓋材を内蓋にヒートシールをして密封する包装方法を採用することにより、上記課題が解決できることを見出し、本発明を完成するに至った。   As a result of intensive studies, the present inventors have peeled off the cover material composed of two layers of the inner cover and the outer cover, and overlaid the inner cover material on the flange portion of the container body filled with the contents and heat sealed. The inventors have found that the above problems can be solved by adopting a packaging method in which the outer lid material is sealed by heat sealing the inner lid, and the present invention has been completed.

すなわち、本発明は、内蓋と外蓋とを形成する2層からなる蓋材を内容物が充填された容器本体にヒートシールして密封する密封容器の製造方法であって、
(i)前記2層からなる蓋材を巻き出す巻き出し工程、
(ii)前記2層からなる蓋材を内蓋材と外蓋材に剥離する剥離工程、
(iii)前記容器本体のフランジ部に内蓋材のヒートシールを行う内蓋ヒートシール工程、
(iv)前記内蓋材の上に外蓋材を重ね合わせてヒートシールを行う外蓋ヒートシール工程、
(v)前記内蓋と外蓋以外を切り取るトリミング工程
を含むことを特徴とする密封容器の製造方法に関する発明である。
That is, the present invention is a method for manufacturing a sealed container for heat-sealing and sealing a two-layer lid material forming an inner lid and an outer lid to a container body filled with contents,
(I) an unwinding step of unwinding the lid material composed of the two layers;
(Ii) a peeling step of peeling the two-layer lid material into an inner lid material and an outer lid material;
(Iii) an inner lid heat sealing step for heat sealing the inner lid material to the flange portion of the container body;
(Iv) an outer lid heat sealing step in which an outer lid material is superposed on the inner lid material for heat sealing;
(V) The invention relates to a method for manufacturing a sealed container, which includes a trimming step of cutting off parts other than the inner lid and the outer lid.

本発明においては更に、
(1)前記巻き出し工程後、殺菌工程を有すること、
(2)少なくとも前記巻き出し工程から内蓋ヒートシール工程までを無菌雰囲気下で行うこと、
(3)前記内蓋材の剥離界面を容器のフランジ部に重ね合わせ、前記外蓋材の剥離界面を前記内蓋にそれぞれヒートシールすること、
(4)内蓋ヒートシール工程と外蓋ヒートシール工程とを連続工程とし、これらのシールを同時に行うこと、
(5)前記内蓋が、外蓋よりも容器内圧の変化に追従して変形し易いこと、
(6)前記剥離工程と内蓋ヒートシール工程との間に、内蓋の成形加工工程を有すること、
(7)前記容器本体のフランジ部と内蓋とのヒートシールを易剥離性シールとし、内蓋と外蓋とのヒートシールを難剥離性シールとすること、
が望ましい。
In the present invention,
(1) having a sterilization step after the unwinding step;
(2) performing at least from the unwinding step to the inner lid heat sealing step in a sterile atmosphere;
(3) superposing the peeling interface of the inner lid material on the flange portion of the container, and heat-sealing the peeling interface of the outer lid material to the inner lid, respectively.
(4) The inner lid heat sealing step and the outer lid heat sealing step are continuous steps, and these sealings are performed simultaneously.
(5) The inner lid is easier to deform following the change in the container internal pressure than the outer lid,
(6) having an inner lid molding process between the peeling step and the inner lid heat sealing step;
(7) The heat seal between the flange portion of the container body and the inner lid is an easily peelable seal, and the heat seal between the inner lid and the outer lid is a hardly peelable seal.
Is desirable.

本発明の密封容器の製造方法によれば、充填密封後の流通時のチルドからホットウォーマー等の広い温度域における容器内圧の変化の吸収、密封性の確保、落下耐性、外観適性、易開封性といった機能を、密封容器に容易、且つ確実に付与することができる。   According to the method for producing a sealed container of the present invention, absorption of changes in the container internal pressure in a wide temperature range from chilled to hot warmer during distribution after filling and sealing, ensuring sealing performance, drop resistance, appearance suitability, easy opening Such a function can be easily and reliably imparted to the sealed container.

本発明の密封容器の製造方法は内蓋と外蓋とを形成する2層からなる蓋材を内容物が充填された容器本体にヒートシールして密封する密封容器の製造方法であって、
(i)前記2層からなる蓋材を巻き出す巻き出し工程、
(ii)前記2層からなる蓋材を内蓋材と外蓋材に剥離する剥離工程、
(iii)前記容器本体のフランジ部に内蓋材のヒートシールを行う内蓋ヒートシール工程、
(iv)前記内蓋材の上に外蓋材を重ね合わせてヒートシールを行う外蓋ヒートシール工程、
(v)前記内蓋と外蓋以外を切り取るトリミング工程
を含むことを特徴とする。
The manufacturing method of the sealed container of the present invention is a manufacturing method of a sealed container for heat-sealing and sealing a two-layer lid material forming an inner lid and an outer lid to a container body filled with contents,
(I) an unwinding step of unwinding the lid material composed of the two layers;
(Ii) a peeling step of peeling the two-layer lid material into an inner lid material and an outer lid material;
(Iii) an inner lid heat sealing step for heat sealing the inner lid material to the flange portion of the container body;
(Iv) an outer lid heat sealing step in which an outer lid material is superposed on the inner lid material for heat sealing;
(V) It includes a trimming step for cutting out parts other than the inner lid and the outer lid.

以下に図1を基に本発明の密封容器の製造方法の詳細について説明する。
(a)巻き出し工程
内蓋材3と外蓋材4の2層からなる蓋材2を原反ロール1から巻き出す巻き出し工程である。
内蓋材3と外蓋材4からなる2層の蓋材は、層間接着力が比較的弱く、層間剥離が生じやすいように共押出、押出ラミネート法等により複合フィルムを作製するのが望ましい。
このように内蓋材3と外蓋材4が同時に巻き出されるので、必要な蓋材量の管理および蓋材を消費した後の補充が容易にできる。
Below, the detail of the manufacturing method of the sealed container of this invention is demonstrated based on FIG.
(A) Unwinding step This is an unwinding step of unwinding the cover material 2 composed of two layers of the inner lid material 3 and the outer lid material 4 from the raw roll 1.
The two-layer lid material composed of the inner lid material 3 and the outer lid material 4 has a relatively weak interlayer adhesive force, and it is desirable to produce a composite film by coextrusion, extrusion lamination method or the like so that delamination is likely to occur.
Thus, since the inner lid member 3 and the outer lid member 4 are unwound at the same time, it is possible to easily manage the amount of the necessary lid member and replenish after the lid member is consumed.

(b)殺菌工程
殺菌工程(b)は、本発明の密封容器の製造方法を無菌下で行う場合に必要な工程となり、前記した原反ロール1から巻き出した蓋材2の内外表面、即ち内蓋材3の外表面と外蓋材4の外表面の両外表面を殺菌する工程である。
前記蓋材2の内蓋材3と外蓋材4の剥離界面は、比較的高温で共押出又は押出ラミネートされるため無菌状態であるが、前記蓋材2の内蓋材3及び外蓋材の両外表面には雑菌が付着しており、前記両外表面の滅菌、殺菌を行う。
殺菌工程(b)における殺菌処理法としては、特に制限はないが、(1)加熱殺菌、(2)過酸化水素、次亜塩素酸ナトリウム、エチルアルコール、過酢酸、オゾンの少なくとも一種を利用した薬剤殺菌、(3)紫外線ランプ殺菌、(4)電子線殺菌、(5)パルス光放射殺菌(6)超音波等が例示できる。
これらの中でも、加熱殺菌、薬剤殺菌、紫外線ランプ殺菌、電子線殺菌、パルス光放射殺菌が特に望ましい。
(B) Sterilization process The sterilization process (b) is a process necessary when the manufacturing method of the sealed container of the present invention is performed under aseptic conditions, and the inner and outer surfaces of the lid material 2 unwound from the raw fabric roll 1, that is, This is a step of sterilizing both the outer surface of the inner lid member 3 and the outer surface of the outer lid member 4.
The peeling interface between the inner lid member 3 and the outer lid member 4 of the lid member 2 is in a sterile state because it is coextruded or extrusion laminated at a relatively high temperature, but the inner lid member 3 and the outer lid member of the lid member 2 are in a sterile state. Bacteria are attached to both outer surfaces of the two, and the outer surfaces are sterilized and sterilized.
The sterilization treatment method in the sterilization step (b) is not particularly limited, but at least one of (1) heat sterilization, (2) hydrogen peroxide, sodium hypochlorite, ethyl alcohol, peracetic acid, and ozone is used. Examples thereof include chemical sterilization, (3) ultraviolet lamp sterilization, (4) electron beam sterilization, (5) pulsed light radiation sterilization, and (6) ultrasonic waves.
Among these, heat sterilization, chemical sterilization, ultraviolet lamp sterilization, electron beam sterilization, and pulsed light sterilization are particularly desirable.

例えば、薬剤による殺菌を行う場合には、図1に示すように薬剤浴21に浸漬した後、必要に応じて洗浄浴22を経て、エアーナイフ23にて付着液を除き、乾燥機24にて乾燥空気又は加熱により乾燥する。
薬剤殺菌において、過酸化水素水溶液を用いる場合は、洗浄浴22を省略してもよく、使用する過酸化水素の濃度は、30〜35質量%程度が望ましい。
また、他の液体の薬剤殺菌方法として、蓋材2両外表面に殺菌液噴霧装置により殺菌液を吹き付け、殺菌液中に浸漬した後、乾燥機により乾燥させるかエアーナイフにより付着の殺菌液を除去する方法を採用することもできる。
さらに、無菌下においては、殺菌工程(b)から後述する少なくとも内蓋シール工程(d)までは無菌雰囲気下にて行われるのが望ましい。なお、この例では、装置内で蓋材を殺菌しているが、予めガンマー線殺菌した蓋材を用いてもよい。ガンマー線殺菌の場合は、2層からなる蓋材2をロール状のまま梱包して、両面および層間までも殺菌でき、装置内の殺菌工程を簡略化できることから好適に適用される。
尚、無菌下で行わない場合は、ホットパック、ボイル殺菌、レトルト殺菌等の公知の殺菌方法を採用することができる。
For example, when sterilizing with a medicine, as shown in FIG. 1, after being immersed in a medicine bath 21, after passing through a washing bath 22 as necessary, the adhesion liquid is removed with an air knife 23, and a dryer 24 is used. Dry with dry air or heat.
In the chemical sterilization, when an aqueous hydrogen peroxide solution is used, the cleaning bath 22 may be omitted, and the concentration of hydrogen peroxide used is preferably about 30 to 35% by mass.
As another method of sterilizing liquid chemicals, sterilizing liquid is sprayed on both outer surfaces of the lid material 2 with a sterilizing liquid spraying device, immersed in the sterilizing liquid, and then dried by a dryer or attached with an air knife. A removal method can also be employed.
Further, under aseptic conditions, it is desirable that the sterilization step (b) to at least the inner lid sealing step (d) described later be performed in a sterile atmosphere. In this example, the lid is sterilized in the apparatus, but a lid sterilized in advance by gamma rays may be used. In the case of gamma ray sterilization, the lid material 2 consisting of two layers is packed in a roll shape and can be sterilized even on both sides and between layers, and can be suitably applied because the sterilization process in the apparatus can be simplified.
In addition, when not performing aseptically, well-known sterilization methods, such as a hot pack, boil sterilization, and a retort sterilization, are employable.

(c)剥離工程
剥離工程(c)は、前記内蓋材3と外蓋材4からなる2層の蓋材2を、内蓋材3と外蓋材4とに剥離する工程であり、内蓋材3と外蓋材4は、前記した共押出、押出ラミネート法等により得るので、剥離は比較的容易に行うことができる。
(C) Peeling Step The peeling step (c) is a step of peeling the two-layer lid material 2 composed of the inner lid material 3 and the outer lid material 4 into the inner lid material 3 and the outer lid material 4. Since the lid 3 and the outer lid 4 are obtained by the above-described coextrusion, extrusion laminating method, etc., peeling can be performed relatively easily.

(d)内蓋材ヒートシール工程
内蓋ヒートシール工程(d)は、内容物が充填された容器本体8のフランジ部に内蓋材3を重ね合わせた後に、ヒートシール装置9を用いてシールを行う工程である。
この場合、前述したように、前記蓋材2の内蓋材3と外蓋材4の剥離界面は、比較的高温で共押出又は押出ラミネートされるため無菌状態であるため、前記内蓋材3の剥離界面を容器のフランジ部に重ね合わせてヒートシールすることにより、容易に密封容器の無菌性を保つことができる。
図1に示すように、内蓋材3の剥離界面の容器のフランジ部への重ね合わせは、蓋材2を内蓋材3と外蓋材4とに剥離した後、前記内蓋材3の剥離面が下方になるように反転することによって達成できる。
特に、本発明の密封容器の製造方法を無菌下で行う場合は、蓋材2の両外表面は殺菌処理がなされるが、内蓋材3と外蓋材4との剥離界面は、前記両外表面と比較して殺菌性が高く、かつ殺菌液等が残存するおそれもないので、反転工程(h)を採用して、前記内蓋材3の剥離界面を容器本体のフランジ部にヒートシールするのが望ましい。
従って、本発明においては、少なくとも前記巻き出し工程から内蓋ヒートシール工程までを無菌雰囲気下で行うことも望ましい態様である。
尚、蓋材2における内蓋材3と外蓋材4の剥離面の無菌性を得るためには、押出温度が好ましくは120℃以上、より好ましくは150℃以上の高温で内蓋材3と外蓋材4を多層化することが望ましい。
(D) Inner lid material heat sealing step In the inner lid heat sealing step (d), the inner lid material 3 is superimposed on the flange portion of the container body 8 filled with the contents, and then sealed using the heat seal device 9. It is a process of performing.
In this case, as described above, the peeling interface between the inner lid member 3 and the outer lid member 4 of the lid member 2 is in a sterile state because it is coextruded or extrusion laminated at a relatively high temperature. By superimposing the peeling interface on the flange portion of the container and heat-sealing, the sterility of the sealed container can be easily maintained.
As shown in FIG. 1, the overlapping of the peeling interface of the inner lid material 3 to the flange portion of the container is performed by peeling the lid material 2 into the inner lid material 3 and the outer lid material 4, and This can be achieved by inverting the peeling surface downward.
In particular, when the method for producing a sealed container of the present invention is performed under aseptic conditions, both outer surfaces of the lid member 2 are sterilized, but the peeling interface between the inner lid member 3 and the outer lid member 4 is Since it is highly sterilizable compared to the outer surface and there is no risk of sterilizing liquid remaining, the reversal step (h) is employed to heat seal the peeling interface of the inner lid material 3 to the flange portion of the container body. It is desirable to do.
Therefore, in the present invention, it is also desirable that at least the unwinding process to the inner lid heat sealing process be performed in an aseptic atmosphere.
In order to obtain sterility of the peeled surfaces of the inner lid member 3 and the outer lid member 4 in the lid member 2, the extrusion temperature is preferably 120 ° C or higher, more preferably 150 ° C or higher. It is desirable to make the outer lid material 4 multilayer.

(e) 外蓋材ヒートシール工程
外蓋ヒートシール工程(e)は、内蓋ヒートシール工程(d)後に、内蓋材3の上に更に外蓋材4を重ねて、外蓋用ヒートシール装置10を用いてヒートシールを行う工程である。
この場合も内蓋材3のヒートシールと同様、前述したように、内蓋材3及び外蓋材4の2層からなる蓋材2の剥離界面を形成していた面は、滅菌された状態であるので、外蓋材4の剥離界面が、内蓋材3と相対する面となるように重ねるのが望ましい。
尚、前述した内蓋ヒートシールと外蓋ヒートシールとのヒートシール工程は、同時に行うこともできる。
(e) Outer cover material heat sealing step The outer cover heat sealing step (e) is performed by superposing the outer cover material 4 on the inner cover material 3 after the inner cover heat sealing step (d) to heat seal the outer cover. In this process, heat sealing is performed using the apparatus 10.
In this case as well as the heat sealing of the inner lid member 3, as described above, the surface forming the peeling interface of the lid member 2 composed of the two layers of the inner lid member 3 and the outer lid member 4 is in a sterilized state. Therefore, it is desirable to overlap the peeling interface of the outer lid member 4 so as to be a surface facing the inner lid member 3.
The heat sealing process of the inner lid heat seal and the outer lid heat seal described above can be performed simultaneously.

(f)トリミング工程
トリミング工程(f)は、トリミング装置11により、内蓋材3による内蓋と外蓋材4による外蓋の形成部以外を切り取る工程である。
尚、図1では、外蓋ヒートシール工程後に、内蓋材3と外蓋材4を同時に切り取っているが、内蓋材3については、必要に応じて、内蓋ヒートシール工程後にトリミング装置11’により切り取ってもよい。
トリミング後の内蓋材3及び外蓋材4からなるスクラップ材13は巻き取り機14で巻き取られる。
(F) Trimming Step The trimming step (f) is a step in which the trimming device 11 cuts out portions other than the inner lid formed by the inner lid member 3 and the outer lid formed by the outer lid member 4.
In FIG. 1, after the outer lid heat sealing process, the inner lid material 3 and the outer lid material 4 are cut out at the same time. However, the inner lid material 3 may be trimmed after the inner lid heat sealing process if necessary. You can cut it out with '.
The scrap material 13 composed of the inner lid material 3 and the outer lid material 4 after trimming is wound up by a winder 14.

(g)成形工程
本発明の密封容器の製造方法においては、前記内蓋3が外蓋4よりも容器内圧の変化に追従して変形し易い構成とすることが望ましく、そのような構成としては、2層の蓋材3、4のうち、容器本体側に位置する内蓋材3を変形可能な可撓性に富む落とし蓋構造を採用することができる。
この場合、蓋材2を内蓋材3と外蓋材4とに剥離した後に、落とし蓋形態の立体的な形状7とするために、前記内蓋材3を成形加工する。
この成形加工は、内蓋材成形加工手段6を用いて、冷間成形、熱間成形等により行うことができるが、熱間成形を採用する場合には、内蓋材3を予め加熱装置5で加熱し、圧空成形、真空成形等により内蓋を成形することができる。
また、内蓋3が外蓋4よりも容器内圧の変化に追従して変形し易い構成とするには、他に、前記内蓋3の材料として、外蓋4よりも延伸強度が低く、かつ破断伸びが大きい材料を選択しても良い。
(G) Molding process In the manufacturing method of the sealed container of the present invention, it is desirable that the inner lid 3 is more easily deformed following the change in the container inner pressure than the outer lid 4. Of the two layers of the lid materials 3 and 4, a flexible drop lid structure capable of deforming the inner lid material 3 located on the container body side can be employed.
In this case, after the lid member 2 is peeled off into the inner lid member 3 and the outer lid member 4, the inner lid member 3 is molded to form a three-dimensional shape 7 in the form of a drop lid.
This forming process can be performed by cold forming, hot forming or the like using the inner cover material forming processing means 6. However, when hot forming is employed, the inner cover material 3 is preliminarily attached to the heating device 5. And the inner lid can be formed by pressure forming, vacuum forming or the like.
In addition, in order to make the inner lid 3 more easily deformed following the change in the internal pressure of the container than the outer lid 4, as the material of the inner lid 3, the stretching strength is lower than that of the outer lid 4, and A material having a large elongation at break may be selected.

本発明の密封容器の製造方法においては、容器本体のフランジ部と内蓋3とのヒートシールを易剥離性シールとし、内蓋3と外蓋4とのヒートシールを難剥離性シールとすることにより、より一層、内容物を充填密封した容器の容器内圧の変化時に、難剥離性シールされた外蓋4によって容器変形が防止され、容器本体側の内蓋3の密封性と易開封性を確保することができる。   In the sealed container manufacturing method of the present invention, the heat seal between the flange portion of the container body and the inner lid 3 is an easily peelable seal, and the heat seal between the inner lid 3 and the outer lid 4 is a hardly peelable seal. Thus, when the internal pressure of the container filled and sealed with the contents is further changed, the container is prevented from being deformed by the outer lid 4 which is sealed to prevent peeling, and the inner lid 3 on the container body side is sealed and easily opened. Can be secured.

かくして、本発明によって得られた密封容器12は、内蓋3と外蓋4との二重蓋構造となり、このため、例えば、内容物を充填して密封した後の流通時のチルドからホットウォーマー等の広い温度域における容器内圧の変化の吸収、密封性の確保、落下耐性、外観適性、易開封性といった機能を容易に、確実に付与することができる。   Thus, the sealed container 12 obtained by the present invention has a double lid structure of the inner lid 3 and the outer lid 4, and for this reason, for example, from chilled to hot warmer etc. during distribution after filling and sealing the contents Functions such as absorption of changes in the internal pressure of the container over a wide temperature range, ensuring sealing performance, drop resistance, appearance suitability, and easy opening properties can be easily and reliably imparted.

次に、本発明の密封容器の製造方法によって製造される密封容器を例示する。
図2乃至図4に示す密封容器は、容器本体30がカップ状に形成された側壁部31及び底部32から成り、前記側壁部31の開口端部にフランジ部33が形成され、容器本体側の内蓋34と容器本体の外側の外蓋35とから構成され、前記内蓋34を変形可能な可撓性に富む落とし蓋構造としている。
また、容器本体30のフランジ部33と内蓋34とのシール部を易剥離性シール部36、外蓋35と前記内蓋34とのシール部を難剥離性シール部37とし、その位置関係を、その外端縁方向に沿って部分的に重なる位置関係とし、前記易剥離性シール部36の内側端縁38を、難剥離性シール部37の内側端縁39よりも内側に位置させている。
開封開始部においては、蓋材に把持部Tを設け、容器の外側に突出させ、開封部となる易剥離シール部36に外側からの剥離力が作用するように、2層の蓋34、35から成る摘み部Tを把持して上方に引き上げると、剥離力P’は易剥離性シール部9に作用し、手による剥離開封が容易に行える。
尚、前記摘み部Tは、内蓋34、或いは外蓋35の何れか一方に設けても良い。
Next, the sealed container manufactured by the manufacturing method of the sealed container of this invention is illustrated.
The sealed container shown in FIGS. 2 to 4 includes a side wall 31 and a bottom 32 in which a container main body 30 is formed in a cup shape, and a flange 33 is formed at the open end of the side wall 31, An inner lid 34 and an outer lid 35 on the outer side of the container main body, and the inner lid 34 has a flexible drop lid structure that can be deformed.
Further, the seal portion between the flange portion 33 and the inner lid 34 of the container body 30 is an easily peelable seal portion 36, and the seal portion between the outer lid 35 and the inner lid 34 is a hardly peelable seal portion 37. The inner edge 38 of the easily peelable seal portion 36 is positioned on the inner side of the inner edge 39 of the hardly peelable seal portion 37. .
In the opening start portion, the lid member 34 is provided with a grip portion T, protrudes to the outside of the container, and the peeling force from the outside acts on the easily peelable seal portion 36 serving as the opening portion. When the knob portion T made of is gripped and pulled upward, the peeling force P ′ acts on the easily peelable seal portion 9 and can be easily peeled open by hand.
The knob portion T may be provided on either the inner lid 34 or the outer lid 35.

そして、図3に示すように、容器内側から内蓋34及び外蓋35のシール部36、37に剥離力が作用した場合は、最初に容器内圧による剥離力は内蓋34に作用するが、内蓋34が容器内圧に追従して変形することにより、内蓋34と外蓋35の空間部43のガス圧が外蓋35に作用し、直接内蓋34が外蓋35を押し作用する。
更に、外蓋35に作用した剥離力あるいは破壊力は、易剥離性シール部36の内側端縁38が難剥離性シール部37の内側端縁39よりも内側に位置しているため難剥離性シール部37に作用し、例えば23N/15mm以上のような大きな剥離力あるいは破壊力に耐えることができる。
As shown in FIG. 3, when a peeling force acts on the seal portions 36 and 37 of the inner lid 34 and the outer lid 35 from the inside of the container, the peeling force due to the container internal pressure first acts on the inner lid 34. When the inner lid 34 deforms following the container internal pressure, the gas pressure in the space 43 of the inner lid 34 and the outer lid 35 acts on the outer lid 35, and the inner lid 34 directly pushes the outer lid 35.
Further, the peeling force or breaking force acting on the outer lid 35 is difficult to peel off because the inner edge 38 of the easily peelable seal portion 36 is located inside the inner edge 39 of the hardly peelable seal portion 37. It acts on the seal portion 37 and can withstand a large peeling force or breaking force such as 23 N / 15 mm or more.

この密封容器においては、図4に示すように、容器本体30の外側の外蓋35の中心部に通気孔42から成る通気部を設け、内蓋34と外蓋35間の空間部43を外気と連通させることにより、前記落とし蓋形態の内蓋34を、容器内圧の変化に追従してさらにより一層容易に変形させることができる。
この通気孔42は、充填密封後の内容物をレトルト殺菌乃至ボイル殺菌する場合、前記通気孔42を介して内蓋34と外蓋35の空間部に水分等が入るのでこれを防止するため閉じた状態とし、流通時等において前記空間部43にある一定以上の内圧が発生した時点で開口するようにしても良い。
尚、前記通気部を設ける手段としては、内蓋34と外蓋35の難剥離性シール部37に未シール部として設けても良く、例えば前記難剥離性シール部37に部分的に易剥離シール部、容器内方に向く烏口状シール部、又は外蓋35に溝状の弱化部等を設け、内蓋34と外蓋35間の空間部に内圧が発生したときに外気と連通させるようにしても良い。
In this sealed container, as shown in FIG. 4, a ventilation portion including a ventilation hole 42 is provided at the center of the outer lid 35 on the outside of the container body 30, and the space 43 between the inner lid 34 and the outer lid 35 is outside air. By communicating with the inner lid 34, the inner lid 34 in the form of the drop lid can be more easily deformed following the change in the container internal pressure.
When the contents after filling and sealing are sterilized by retort or boil sterilization, the vent hole 42 is closed to prevent moisture from entering the space between the inner lid 34 and the outer lid 35 through the vent hole 42. It is also possible to make it open when the internal pressure above a certain level is generated in the space 43 during distribution or the like.
As a means for providing the ventilation portion, it may be provided as an unsealed portion on the hardly peelable seal portion 37 of the inner lid 34 and the outer lid 35. For example, the easily peelable seal is partially provided on the hardly peelable seal portion 37. A groove-shaped weakened portion or the like is provided on the outer lid, the mouth-shaped seal portion facing the inside of the container, or the outer lid 35 so that it communicates with the outside air when an internal pressure is generated in the space between the inner lid 34 and the outer lid 35. May be.

図5乃至図7に示す密封容器は、前記内蓋34の材料として、外蓋35よりも延伸強度が低く、かつ破断伸びが大きい材料を選択した例で、その際、容器本体のフランジ部と内蓋34とのシール部を易剥離性シール部36、前記内蓋34と外蓋35とのシール部を難剥離性シール部37とし、前記易剥離性シール部36と難剥離性シール部37を部分的に重なる位置関係とし、易剥離性シール部36の内側端縁38を難剥離性シール部37の内側端縁39よりも内側に位置させている。
このような構成とすることにより、容器本体の剛性が比較的低い場合、容器本体30のフランジ部33と内蓋34間が易剥離性シール部36であっても、側面落下に伴う容器変形が、前記内蓋34上に難剥離シール部37を介してシールされた外蓋35によって防止され、容器の破損乃至は密封破壊が効果的に防止される。
即ち、難剥離シール部37を介しての外蓋35の存在により、側面落下時の容器の大きな変形、或いは破損、容器本体30のフランジ部33と内蓋34間の易剥離性シール部36の剥離による密封不良が防止される。
一方、外蓋35がない場合には、内蓋34の延伸強度にもよるが、側面落下によりフランジ部33が大きく変形し、容器本体30が破損したり、フランジ部33と内蓋34間の易剥離性シール部36が剥がれたりするおそれがある。
The sealed container shown in FIGS. 5 to 7 is an example in which a material having a lower stretching strength and a larger elongation at break than the outer cover 35 is selected as the material of the inner lid 34. A seal part with the inner lid 34 is an easily peelable seal part 36, a seal part with the inner lid 34 and the outer cover 35 is a hardly peelable seal part 37, and the easily peelable seal part 36 and the hardly peelable seal part 37 are used. And the inner end edge 38 of the easily peelable seal portion 36 is positioned inside the inner end edge 39 of the hardly peelable seal portion 37.
By adopting such a configuration, when the rigidity of the container body is relatively low, even if the space between the flange portion 33 and the inner lid 34 of the container body 30 is an easily peelable seal portion 36, the container is deformed due to a side drop. The outer lid 35 is sealed on the inner lid 34 via a hard-to-peel seal portion 37 to effectively prevent the container from being damaged or hermetically sealed.
That is, due to the presence of the outer lid 35 via the hardly peelable seal portion 37, the container is greatly deformed or broken when the side is dropped, and the easily peelable seal portion 36 between the flange portion 33 and the inner lid 34 of the container body 30. Sealing failure due to peeling is prevented.
On the other hand, when there is no outer lid 35, depending on the extension strength of the inner lid 34, the flange portion 33 is greatly deformed due to a side drop, and the container body 30 is damaged, or between the flange portion 33 and the inner lid 34. There is a possibility that the easily peelable seal portion 36 may be peeled off.

尚、この密封容器においても、図7に示すように、容器本体30の外側の外蓋35の中心部に通気部として通気孔42等を設け、内蓋34と外蓋35間の空間部43を外気と連通させても良い。   Also in this sealed container, as shown in FIG. 7, a vent hole 42 or the like is provided as a ventilation portion at the center of the outer lid 35 outside the container body 30, and a space 43 between the inner lid 34 and the outer lid 35 is provided. May communicate with the outside air.

[容器本体の材料]
本発明の密封容器の製造方法に用いられる容器本体の材料としては、それ自体公知の任意の容器形成素材、例えば樹脂、金属、紙、ガラス、セラミックスあるいはこれらの積層体から形成されることができる。
容器本体は、ヒートシール性を有する樹脂単独から形成することができるが、アルミ箔、鋼箔、ブリキ箔等の金属箔の場合には、少なくともヒートシール性を有する樹脂をその容器内面の全面乃至はフランジのヒートシール面に積層させる必要がある。
ヒートシール性を有する樹脂としては、例えば、低、中、高密度ポリエチレン、アイソタクテイックポリプロピレン、プロピレン−エチレン共重合体、エチレン−酢酸ビニル共重合体、エチレン系不飽和カルボン酸乃至その無水物でグラフト変性されたオレフィン樹脂等のオレフィン系樹脂、比較的低融点又は低軟化点のポリアミド又は共重合ポリアミド、比較的低融点又は低軟化点のポリエステル又は共重合ポリエステル樹脂等が挙げられる。
[Container material]
As a material of the container main body used in the manufacturing method of the sealed container of the present invention, it can be formed from any known container forming material such as resin, metal, paper, glass, ceramics or a laminate thereof. .
The container body can be formed from a resin having heat sealability alone, but in the case of a metal foil such as aluminum foil, steel foil, tin foil, at least a resin having heat sealability is applied to the entire inner surface of the container. Must be laminated on the heat seal surface of the flange.
Examples of the resin having heat sealability include low, medium and high density polyethylene, isotactic polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylenically unsaturated carboxylic acid or anhydride thereof. Examples thereof include olefin resins such as graft-modified olefin resins, polyamides or copolymerized polyamides having a relatively low melting point or a low softening point, polyesters or copolymerized polyester resins having a relatively low melting point or a low softening point, and the like.

[蓋材の材料]
1.容器本体側の内蓋
本発明の密封容器の製造方法に使用する容器本体側の内蓋としては、単層、多層のフィルム、シートのいずれであってもよいが、容器内圧の変化に追従して変形可能な可撓性に富む樹脂材料が望ましく、容器本体30のフランジ33との易剥離性シール部36、及び容器本体外側の外蓋35との難剥離性シール部37といった各シール部の形成、或いは内蓋34へのガスバリア性等の機能付与といった目的に応じて適宜選択すれば良い。
例えば、容器本体の構成材料として例示した低、中、高密度ポリエチレン、ポリプロピレン、アイソタクテイックポリプロピレン、プロピレン−エチレン共重合体、エチレン−酢酸ビニル共重合体、エチレン系不飽和カルボン酸又はその無水物でグラフト変性されたオレフィン樹脂等のオレフィン系樹脂、比較的低融点又は低軟化点のポリアミド又は共重合ポリアミド、比較的低融点又は低軟化点のポリエステル又は共重合ポリエステル樹脂が挙げられる。
これらを用いて、容器本体30のフランジ部33との易剥離性シール部36、容器本体外側の外蓋35との難剥離性シール部又は易剥離性シール部の形成を考慮して材料を選択する。
[Cover material]
1. Inner lid on the container body side The inner lid on the container body side used in the manufacturing method of the sealed container of the present invention may be any of a single layer, a multilayer film, and a sheet. A flexible resin material that can be deformed is desirable, and each seal portion such as an easily peelable seal portion 36 with the flange 33 of the container body 30 and an easily peelable seal portion 37 with the outer lid 35 outside the container body is provided. What is necessary is just to select suitably according to the objectives, such as formation or function provision, such as gas barrier property, to the inner cover 34.
For example, low, medium, high density polyethylene, polypropylene, isotactic polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylenically unsaturated carboxylic acid or anhydride thereof exemplified as the constituent material of the container body And olefin-based resins such as olefin resins graft-modified, relatively low melting point or low softening point polyamides or copolymerized polyamides, relatively low melting point or low softening point polyesters or copolymerized polyester resins.
Using these, the material is selected in consideration of the formation of an easily peelable seal portion 36 with the flange portion 33 of the container body 30 and an easily peelable seal portion with the outer lid 35 outside the container body or an easily peelable seal portion. To do.

また、容器本体側の内蓋34に、酸素バリア、水蒸気バリア等のガスバリア性、フレーバーバリア性、紫外線等の光線バリア性等のバリア性を容易に付与することもでき、前記バリア性を付与する場合は、バリア性樹脂としては公知の任意のものが適用でき、例えば、ガスバリア性樹脂としては、エチレン−ビニルアルコール共重合体、ポリアミド樹脂、ガスバリア性ポリエステル樹脂、環状オレフィン系共重合体などを用いることができる。
また、ガスバリアとして酸素吸収性を付与することも可能で、酸素吸収性樹脂としては、遷移金属触媒と酸化性有機成分、或いはそれらをバリア樹脂に含有する公知の任意のものが挙げられる。
Further, the inner lid 34 on the container body side can easily be provided with barrier properties such as gas barrier properties such as oxygen barrier and water vapor barrier, flavor barrier properties, and light barrier properties such as ultraviolet rays, and the barrier properties are imparted. In this case, any known barrier resin can be used. For example, an ethylene-vinyl alcohol copolymer, a polyamide resin, a gas barrier polyester resin, a cyclic olefin copolymer, or the like is used as the gas barrier resin. be able to.
Moreover, it is also possible to provide oxygen absorptivity as a gas barrier, and examples of the oxygen-absorbing resin include a transition metal catalyst and an oxidizing organic component, or any known one containing them in a barrier resin.

さらに、前記内蓋34を多層フィルムとする場合は、必要に応じて任意の樹脂層を設けることができ、層間に接着性がない場合には、これらの層間に接着剤樹脂層を介在させることができる。
接着剤樹脂としては、特に限定されないが、酸変性オレフィン系樹脂、例えば、無水マレイン酸グラフトポリエチレン、無水マレイン酸グラフトポリプロピレン、ウレタン系接着剤などを用いることができる。
Furthermore, when the inner lid 34 is a multi-layer film, an arbitrary resin layer can be provided as necessary. When there is no adhesion between the layers, an adhesive resin layer is interposed between these layers. Can do.
The adhesive resin is not particularly limited, and acid-modified olefin-based resins such as maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, and urethane-based adhesives can be used.

2.容器本体外側の外蓋
容器本体の外側の外蓋35としては、前述した容器本体側の内蓋34と同様に単層、多層のフィルム、シートのいずれであってもよいが、容器本体側の内蓋34との難剥離性シール部37の形成を考慮して適宜選択される。
尚、前記外蓋は、容器に落下耐性を付与するために比較的引っ張り破断強度の高い金属箔層乃至は未延伸または延伸フィルムを使用するのが望ましい。また、外蓋には、容器本体の形状に対応する絵柄、文字等をグラビア印刷等の公知の方法で印刷した基材を用いることができる。
2. The outer lid on the outer side of the container body The outer lid 35 on the outer side of the container body may be any of a single layer, a multilayer film, and a sheet, similar to the inner lid 34 on the container body side described above. It is appropriately selected in consideration of the formation of the hardly peelable seal portion 37 with the inner lid 34.
The outer lid is preferably made of a metal foil layer or a non-stretched or stretched film having a relatively high tensile breaking strength in order to impart drop resistance to the container. Moreover, the base material which printed the image, the character, etc. corresponding to the shape of a container main body by well-known methods, such as gravure printing, can be used for an outer cover.

3.内蓋材、外蓋材の2層から成る蓋材の層間剥離の形成方法
本発明で使用される蓋材は、少なくとも外蓋材と内蓋材となるべき2層が弱接着しており、層間剥離できるものである。かつ内蓋材は外蓋材あるいは容器本体のフランジヒートシール面と、ヒートシールすることによって、難剥離性シール部あるいは易剥離性シール部を形成しなければならない。
層間剥離するような弱接着を形成する方法としては、公知の任意の方法が適用できる。例えば、前記ヒートシール樹脂からなる面に同じ乃至は同種の樹脂を押出コート乃至共押出コートし、押し出し温度を低くし、エアギャップを大きくとる、あるいは加工速度を早くするなどすることにより、弱接着強度とすることができる。また、層間剥離すべき一方または両方に、接着を阻害する有機物乃至は無機物および樹脂などを、ヒートシール性を大きく阻害しない範囲でブレンドしてもよい。なお、押出コート乃至共押出コート時に反対側より別基材を挿入し、いわゆるサンドイッチラミネーションとしてもよい。
また、別方としては、内蓋材と外蓋材間のヒートシール樹脂と、内蓋材と容器本体のフランジヒートシール面間のヒートシール樹脂とをヒートシール性を示さない異なる樹脂系とし、これらのヒートシール樹脂間の弱接着を利用する方法が上げられる。例えば、内蓋材と外蓋材間のヒートシール樹脂をポリオレフィン系樹脂(PO)とし、内蓋材と容器本体のフランジヒートシール面間のヒートシール樹脂をポリエステル系樹脂(PEs)として、強接着が得られるドライラミネーションなどの方法で積層した外蓋材形成基材(基材/PO)と内蓋材形成基材(PEs/PO)をPOでサンドイッチラミネーションし、蓋材(基材/PO・PO・PEs/PO)を作成する。得られた蓋材は、PO・PEs間が弱接着となるので、この間で容易に剥離し、外蓋材(基材/PO・PO)と内蓋材(PEs/PO)が得られる。同様に、外蓋材形成基材(基材/PO)と内蓋材形成基材(PO)をPO/PEs/接着性樹脂/POの構成で共押出ししてサンドイッチラミネーションし、蓋材(基材/PO・PO/PEs/接着性樹脂/PO・PO)を作成する。得られた蓋材を剥離すると外蓋材(基材/PO・PO)と内蓋材(PEs/接着性樹脂/PO・PO)が得られる。この場合、剥離されるPO/PEs間は無菌性の高い面となる。なお、これらの例の場合、剥離後、外蓋材または内蓋材の一方を反転して用いる。
以上の例に限らず、様々な構成を採用することができる。
3. Forming method of delamination of a cover material composed of two layers of an inner cover material and an outer cover material The cover material used in the present invention is weakly bonded to at least two layers to be an outer cover material and an inner cover material, It can be delaminated. In addition, the inner lid member must be heat-sealed with the outer lid member or the flange heat seal surface of the container main body to form a hardly peelable seal portion or an easily peelable seal portion.
Any known method can be applied as a method of forming weak adhesion that causes delamination. For example, weak adhesion can be achieved by extruding or coextruding the same or the same type of resin to the surface made of the heat seal resin, lowering the extrusion temperature, increasing the air gap, or increasing the processing speed. It can be strength. Moreover, you may blend the organic substance thru | or inorganic substance, resin, etc. which inhibit adhesion | attachment in the range which does not largely inhibit heat sealing property to one or both which should delaminate. In addition, it is good also as what is called a sandwich lamination by inserting another base material from the other side at the time of extrusion coating or coextrusion coating.
Alternatively, the heat seal resin between the inner lid material and the outer lid material, and the heat seal resin between the inner lid material and the flange heat seal surface of the container body are different resin systems that do not exhibit heat sealability, A method using weak adhesion between these heat seal resins is raised. For example, the heat seal resin between the inner lid material and the outer lid material is a polyolefin resin (PO), and the heat seal resin between the inner lid material and the flange heat seal surface of the container body is a polyester resin (PEs). The outer lid material forming base material (base material / PO) and the inner lid material forming base material (PEs / PO) laminated by a method such as dry lamination to obtain a sandwich are laminated with PO, and the lid material (base material / PO PO · PEs / PO). Since the obtained lid material is weakly bonded between PO and PEs, it is easily peeled off during this period, and an outer lid material (base material / PO · PO) and an inner lid material (PEs / PO) are obtained. Similarly, the outer lid material forming base material (base material / PO) and the inner lid material forming base material (PO) are co-extruded in the configuration of PO / PEs / adhesive resin / PO and sandwich-laminated to obtain the lid material (base material). Material / PO · PO / PEs / adhesive resin / PO · PO). When the obtained lid material is peeled off, an outer lid material (base material / PO · PO) and an inner lid material (PEs / adhesive resin / PO · PO) are obtained. In this case, the PO / PEs to be peeled have a high sterility. In the case of these examples, after peeling, one of the outer lid member and the inner lid member is inverted and used.
Not limited to the above example, various configurations can be employed.

本発明の包装方法は、食品、飲料等の内容物を充填、密封する密封容器の製造において広く使用できる。   The packaging method of the present invention can be widely used in the manufacture of sealed containers that are filled and sealed with contents such as foods and beverages.

本発明の密封容器の製造方法の工程図Process drawing of the manufacturing method of the sealed container of this invention 密封容器の参考図Reference drawing of sealed container 容器内から剥離力が作用した際の参考図Reference diagram when peeling force is applied from inside the container 通気部を設けた密封容器の参考図Reference drawing of a sealed container with a vent 他の密封容器の参考図Reference drawing of other sealed containers 容器内から剥離力が作用した際の参考図Reference diagram when peeling force is applied from inside the container 通気部を設けた密封容器の参考図Reference drawing of a sealed container with a vent

符号の説明Explanation of symbols

1:原反ロール
2:2層からなる蓋材
3:内蓋材
4:外蓋材
5:加熱装置
6:内蓋成形加工装置
8:内容物が充填された容器本体
9:内蓋材用ヒートシール装置
10:外蓋材用ヒートシール装置
11:トリミング装置
12:密封容器
13:スクラップ材
14:巻取り機
21:過酸化水素水溶液浴
22:洗浄浴
23:エアーナイフ
24:乾燥機
1: Raw material roll 2: Cover material 3 consisting of two layers: Inner cover material 4: Outer cover material 5: Heating device 6: Inner cover molding processing device 8: Container body 9 filled with contents 9: For inner cover material Heat seal device 10: Heat seal device 11 for outer lid material 11: Trimming device 12: Sealed container 13: Scrap material 14: Winder 21: Hydrogen peroxide solution bath 22: Cleaning bath 23: Air knife 24: Dryer

Claims (8)

内蓋と外蓋とを形成する2層からなる蓋材を内容物が充填された容器本体にヒートシールして密封する密封容器の製造方法であって、
(i)前記2層からなる蓋材を巻き出す巻き出し工程、
(ii)前記2層からなる蓋材を内蓋材と外蓋材に剥離する剥離工程、
(iii)前記容器本体のフランジ部に内蓋材のヒートシールを行う内蓋ヒートシール工程、
(iv)前記内蓋材の上に外蓋材を重ね合わせてヒートシールを行う外蓋ヒートシール工程、
(v)前記内蓋と外蓋以外を切り取るトリミング工程
を含むことを特徴とする密封容器の製造方法。
A method of manufacturing a sealed container in which a lid material composed of two layers forming an inner lid and an outer lid is heat-sealed and sealed in a container body filled with contents,
(I) an unwinding step of unwinding the lid material composed of the two layers;
(Ii) a peeling step of peeling the two-layer lid material into an inner lid material and an outer lid material;
(Iii) an inner lid heat sealing step for heat sealing the inner lid material to the flange portion of the container body;
(Iv) an outer lid heat sealing step in which an outer lid material is superposed on the inner lid material for heat sealing;
(V) A method for manufacturing a sealed container, comprising a trimming step of cutting out parts other than the inner lid and the outer lid.
前記巻き出し工程後、殺菌工程を有することを特徴とする請求項1に記載の密封容器の製造方法。   The method for producing a sealed container according to claim 1, further comprising a sterilization step after the unwinding step. 少なくとも前記巻き出し工程から内蓋ヒートシール工程までを無菌雰囲気下で行うことを特徴とする請求項1又は2に記載の密封容器の製造方法。   The method for producing a sealed container according to claim 1 or 2, wherein at least the process from the unwinding step to the inner lid heat sealing step is performed in an aseptic atmosphere. 前記内蓋材の剥離界面を容器のフランジ部に重ね合わせ、前記外蓋材の剥離界面を前記内蓋それぞれヒートシールする請求項1乃至3の何れかに記載の密封容器の製造方法。   The method for manufacturing a sealed container according to any one of claims 1 to 3, wherein the peeling interface of the inner lid material is overlapped with a flange portion of the container, and the peeling interface of the outer lid material is heat sealed. 内蓋ヒートシール工程と外蓋ヒートシール工程とを連続工程とし、これらのシールを同時に行うことを特徴とする請求項1乃至4の何れかに記載の密封容器の製造方法。   The method for producing a sealed container according to any one of claims 1 to 4, wherein the inner lid heat sealing step and the outer lid heat sealing step are continuous steps, and the sealing is performed simultaneously. 前記内蓋が外蓋よりも容器内圧の変化に追従して変形し易いことを特徴とする請求項1乃至5の何れかに記載の密封容器の製造方法。   6. The method of manufacturing a sealed container according to claim 1, wherein the inner lid is more easily deformed following the change in the container internal pressure than the outer lid. 前記剥離工程と内蓋ヒートシール工程との間に、内蓋の成形加工工程を有することを特徴とする請求項1乃至6の何れかに記載の密封容器の製造方法。   The method for producing a sealed container according to any one of claims 1 to 6, further comprising an inner lid molding step between the peeling step and the inner lid heat sealing step. 前記容器本体のフランジ部と内蓋とのヒートシールを易剥離性シールとし、内蓋と外蓋とのヒートシールを難剥離性シールとすることを特徴とする請求項1乃至7の何れかに記載の密封容器の製造方法。   The heat seal between the flange portion and the inner lid of the container body is an easily peelable seal, and the heat seal between the inner lid and the outer lid is a hardly peelable seal. The manufacturing method of the sealed container of description.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013209154A (en) * 2012-03-02 2013-10-10 Toyo Aluminum Ekco Products Kk Lid for fitting container
JP5538614B1 (en) * 2013-11-22 2014-07-02 アンドウケミカル株式会社 Sealed container
JP5654156B1 (en) * 2014-04-17 2015-01-14 アンドウケミカル株式会社 Sealed container
JP2015131650A (en) * 2014-01-10 2015-07-23 凸版印刷株式会社 Method for production of packaging container
JP2015178373A (en) * 2014-03-19 2015-10-08 東京食品機械株式会社 Deep drawing packaging container and method for manufacturing the same

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JPS5980265U (en) * 1982-11-19 1984-05-30 東洋アルミニウム株式会社 packaging container
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597304A (en) * 1978-12-28 1980-07-24 Sumitomo Bakelite Co Packing method
JPS5898357U (en) * 1981-12-24 1983-07-04 東洋製罐株式会社 Sealed packaging for hot packs
JPS5980265U (en) * 1982-11-19 1984-05-30 東洋アルミニウム株式会社 packaging container
JPH01111632A (en) * 1987-10-16 1989-04-28 Ckd Corp Germless filling and packing
JP2003276755A (en) * 2002-03-25 2003-10-02 Fujimori Kogyo Co Ltd Lid member, apparatus and method for sealing container

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013209154A (en) * 2012-03-02 2013-10-10 Toyo Aluminum Ekco Products Kk Lid for fitting container
JP5538614B1 (en) * 2013-11-22 2014-07-02 アンドウケミカル株式会社 Sealed container
JP2015131650A (en) * 2014-01-10 2015-07-23 凸版印刷株式会社 Method for production of packaging container
JP2015178373A (en) * 2014-03-19 2015-10-08 東京食品機械株式会社 Deep drawing packaging container and method for manufacturing the same
JP5654156B1 (en) * 2014-04-17 2015-01-14 アンドウケミカル株式会社 Sealed container

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