JP6565264B2 - Cap for liquid paper container and liquid paper container with it attached - Google Patents

Cap for liquid paper container and liquid paper container with it attached Download PDF

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JP6565264B2
JP6565264B2 JP2015068390A JP2015068390A JP6565264B2 JP 6565264 B2 JP6565264 B2 JP 6565264B2 JP 2015068390 A JP2015068390 A JP 2015068390A JP 2015068390 A JP2015068390 A JP 2015068390A JP 6565264 B2 JP6565264 B2 JP 6565264B2
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paper container
liquid paper
spout
cap
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JP2016188088A (en
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森本　功
功 森本
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Toppan Inc
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Description

本発明は、液体用紙容器の口栓とそれを取り付けた液体用紙容器に関するものである。特に内容物を消費後、液体用紙容器を廃棄しやすいように、スパウトとキャップからなる口栓のスパウトの注出部を容易に分離できるようにした液体用紙容器の口栓とそれを取り付けた液体用紙容器に関するものである。   The present invention relates to a stopper for a liquid paper container and a liquid paper container to which the stopper is attached. In particular, it is easy to dispose of the spout of the spout and cap so that the liquid paper container can be easily discarded after consuming the contents. It relates to paper containers.

食品や非食品の液体の内容物に使用される液体用紙容器は、果汁飲料、ジュース、お茶、コーヒー、乳飲料、スープ等の液体飲料、日本酒、焼酎等の酒類に広く用いられている。この液体用紙容器は、紙層と、紙層の少なくとも内面に熱可塑性樹脂からなるシーラント層が設けられた積層材料を製函してなり、紙層とシーラント層の間にアルミ箔やアルミ蒸着フィルム、あるいは、無機酸化物蒸着フィルムなどのバリア性のある層を設けたものなどがある（例えば、特許文献１）。   Liquid paper containers used for liquid contents of foods and non-foods are widely used for liquid drinks such as fruit juice drinks, juices, teas, coffees, milk drinks, soups, and alcoholic beverages such as sake and shochu. This liquid paper container is made of a laminated material in which a paper layer and a sealant layer made of a thermoplastic resin are provided on at least an inner surface of the paper layer, and an aluminum foil or an aluminum vapor deposition film is provided between the paper layer and the sealant layer. Or there exist what provided the layer with barrier property, such as an inorganic oxide vapor deposition film, etc. (for example, patent document 1).

近年、環境保全の問題から使用後の空容器の分別収集や、廃棄物の減容化が行われるようにより、廃棄の際に空容器を解体することが行われている。しかし、ゲーベルトップ型の液体用紙容器などでは、屋根板に口栓を設けたものがあるが、口栓が強固に溶着しているため、この口栓を分離するには、ハサミ等で口栓の周りを切って分離する以外には難しかった。   In recent years, empty containers have been dismantled at the time of disposal by separating and collecting empty containers after use and reducing the volume of waste due to environmental conservation problems. However, there are some gable-top type liquid paper containers that have a stopper on the roof plate. However, since the stopper is firmly welded, the stopper can be separated with a pair of scissors. It was difficult except to cut around and separate.

そこで、口栓を液体用紙容器本体から分離しやすい液体用紙容器も開発されるようになった。例えば、スパウトとキャップからなる口栓で、スパウトの注出路となる注出部の外面の下端部分から外方に伸びるフランジ部の内周側上面に破断可能な薄肉部からなる弱化部が形成され、弱化部より径方向外方の上面が液体用紙容器の開口周縁に接着固定されていて、弱化部の破断によって、弱化部より外方のフランジ部が注出部と完全に分離される口栓が開発されている（特許文献２）。   Therefore, a liquid paper container that can easily separate the cap from the liquid paper container body has been developed. For example, a faucet composed of a spout and a cap is formed with a weakened portion consisting of a thin portion that can be broken on the inner peripheral side upper surface of the flange portion extending outward from the lower end portion of the outer surface of the pouring portion serving as a spout passage. The upper surface radially outward from the weakened portion is adhesively fixed to the peripheral edge of the opening of the liquid paper container, and the flange portion outside the weakened portion is completely separated from the pouring portion when the weakened portion is broken. Has been developed (Patent Document 2).

この口栓では、弱化部より外方のフランジ部が注出部と完全に分離され、注出部側を外して液体用紙容器を廃棄することができるが、フランジ部の上面に薄肉部が設けられていることから、口栓溶着時に薄肉部にピンホールが開いてしまう恐れがあった。   In this plug, the flange part outside the weakened part is completely separated from the pouring part, and the liquid paper container can be discarded by removing the pouring part side, but the thin part is provided on the upper surface of the flange part Therefore, there is a possibility that a pinhole is opened in the thin wall portion when the plug is welded.

公知文献を以下に示す。   Known documents are shown below.

特開２００３−３３５３６２号公報JP 2003-335362 A 特開２０１１−７３７４８号公報JP 2011-73748 A

本発明は係る課題に鑑みなされたものであり、液体用紙容器本体への口栓の溶着時にピンホールが開く恐れがなく、使用後は液体用紙容器本体から取り外すことが容易にでき、紙の分別回収に適して、環境にやさしい液体用紙容器の口栓とそれを取り付けた液体用紙容器を提供することを課題とする。   The present invention has been made in view of the above problems, and there is no fear of opening a pinhole when the stopper is welded to the liquid paper container main body, and it can be easily removed from the liquid paper container main body after use, and the paper is separated. It is an object of the present invention to provide an environment-friendly liquid paper container cap suitable for collection and a liquid paper container to which the stopper is attached.

本発明は係る課題に鑑みなされたものであり、請求項１の発明は、液体用紙容器本体に取り付ける口栓であって、スパウトとキャップとからなり、前記スパウトは、注出路となる注出部と、前記注出部の下端部分から外方に伸びるフランジ部とからなり、前記フランジ部の少なくとも液体用紙容器本体とシールする部分を予め形成した中央に丸い孔の開いた円盤状のインサート部材として、前記スパウトをインサートインジェクションにより成型したことを特徴とする液体用紙容器の口栓である。
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention of claim 1 is a spout attached to a liquid paper container main body, which comprises a spout and a cap, and the spout is a pouring part serving as a pouring path. And a flange portion extending outward from the lower end portion of the pouring portion, and as a disc-shaped insert member having a round hole in the center at least a portion to be sealed with the liquid paper container body of the flange portion is formed in advance. A spout of the liquid paper container, wherein the spout is molded by insert injection.

本発明の請求項２の発明は、請求項１に記載の口栓を取り付けたことを特徴とする液体用紙容器である。   According to a second aspect of the present invention, there is provided a liquid paper container to which the cap according to the first aspect is attached.

本発明の液体用紙容器の口栓とそれを取り付けた液体用紙容器は、フランジ部の少なくとも液体用紙容器本体とシールする部分を予め形成した中央に丸い孔の開いた円盤状のインサート部材として、スパウトをインサートインジェクションにより成型しているので、液体用紙容器本体への口栓の溶着時に、ピンホールが開く恐れがなく、使用後は、インサ
ート部材を液体用紙容器本体に残したまま、スパウトの注出部を取り外すことが容易にできる。このため、紙の分別回収に適して、環境にやさしい。 The spigot of the liquid paper container of the present invention and the liquid paper container to which the spigot is attached include a spout as a disc-shaped insert member having a round hole in the center in which at least a portion to be sealed with the liquid paper container body of the flange portion is formed in advance. Since it is molded by insert injection, there is no risk of pinholes opening when the spigot is welded to the liquid paper container body, and after use, the spout is poured out while the insert member remains in the liquid paper container body. The part can be easily removed. For this reason, it is suitable for separating and collecting paper and is environmentally friendly.

本発明の液体用紙容器の口栓の一例を模式的に正面で示した説明図である。It is explanatory drawing which showed typically an example of the stopper of the liquid paper container of this invention in the front. 本発明の液体用紙容器の口栓の一例を取り付けた液体用紙容器を模式的に示した説明図である。It is explanatory drawing which showed typically the liquid paper container which attached an example of the stopper of the liquid paper container of this invention. 本発明の液体用紙容器の口栓の一例のスパウトを模式的に断面で示した説明図である。It is explanatory drawing which showed typically the spout of an example of the stopper of the liquid paper container of this invention in the cross section. 本発明の液体用紙容器の口栓の一例のスパウトを液体用紙容器本体に取り付けた状態を模式的に断面で示した説明図である。It is explanatory drawing which showed typically the state which attached the spout of an example of the stopper of the liquid paper container of this invention to the liquid paper container main body in the cross section. 本発明の液体用紙容器の口栓の一例のスパウトの注出部を液体用紙容器本体から分離した状態を模式的に断面で示した説明図である。It is explanatory drawing which showed typically the state which isolate | separated the spout part of the spout of an example of the stopper of the liquid paper container of this invention from the liquid paper container main body.

以下、本発明を実施するための形態につき説明する。
図１は、本発明の液体用紙容器の口栓の一例を模式的に正面で示した説明図、図２は、本発明の液体用紙容器の口栓の一例を取り付けた液体用紙容器を模式的に示した説明図、図３は、本発明の液体用紙容器の口栓の一例のスパウトを模式的に断面で示した説明図、図４は、本発明の液体用紙容器の口栓の一例のスパウトを液体用紙容器本体に取り付けた状態を模式的に断面で示した説明図、図５は、本発明の液体用紙容器の口栓の一例のスパウトの注出部を液体用紙容器本体から分離した状態を模式的に断面で示した説明図である。 Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory diagram schematically showing an example of a stopper of a liquid paper container of the present invention on the front, and FIG. 2 is a schematic of a liquid paper container to which an example of a stopper of a liquid paper container of the present invention is attached. FIG. 3 is an explanatory view schematically showing a spout of an example of a spout of a liquid paper container of the present invention in cross section, and FIG. 4 is an example of a spout of a liquid paper container of the present invention. FIG. 5 is an explanatory view schematically showing a state in which the spout is attached to the liquid paper container main body in section, and FIG. 5 shows the spout dispensing portion of an example of the spout of the liquid paper container of the present invention separated from the liquid paper container main body. It is explanatory drawing which showed the state typically in the cross section.

本例の液体用紙容器の口栓１００は、図１に示すように、スパウト１とキャップ２とからなり、スパウト１は、注出路となる注出部１１と、注出部１１の下端部分から外方に伸びるフランジ部１２とからなっている。そして、口栓１００は、図２に示すように、液体用紙容器本体２００に内側から注出部１１やキャップ２が外側に出るように取り付けられ、フランジ部１２の上面が液体用紙容器本体２００の内面に溶着されている。   As shown in FIG. 1, the stopper 100 of the liquid paper container of the present example includes a spout 1 and a cap 2, and the spout 1 is formed from a pouring portion 11 serving as a pouring path and a lower end portion of the pouring portion 11. It consists of a flange portion 12 extending outward. As shown in FIG. 2, the spigot 100 is attached to the liquid paper container main body 200 so that the pouring part 11 and the cap 2 come out from the inside, and the upper surface of the flange part 12 is the liquid paper container main body 200. It is welded to the inner surface.

この溶着は超音波シールにより取り付けられている。取り付け方法は、まず、胴部と側部が形成され、上端が開口した液体用紙容器本体２００の上端の開口部より、口栓１００を入れ、口栓取り付け用開孔部に、キャップ２を嵌めた注出部１１を挿入する。   This weld is attached by an ultrasonic seal. First, the cap 100 is inserted through the opening at the upper end of the liquid paper container main body 200 having the body and the side formed and the upper end opened, and the cap 2 is fitted into the opening for attaching the plug. The pouring part 11 is inserted.

そして、フランジ部１２を液体用紙容器本体２００の口栓取り付け用開孔部の内面側の周囲に接するようにし、超音波シール機の溶着受けアンビルでフランジ部１２を内側から当てて押さえ、液体用紙容器本体２００の外側から超音波溶着ホーンで超音波振動を与え
て超音波シールし溶着させる。 Then, the flange portion 12 is brought into contact with the periphery of the inner surface side of the opening portion for attaching the cap of the liquid paper container main body 200, and the flange portion 12 is pressed from the inside by the welding receiving anvil of the ultrasonic sealing machine and pressed. Ultrasonic vibration is applied from the outside of the container body 200 with an ultrasonic welding horn to perform ultrasonic sealing and welding.

本例の口栓１００のスパウト１は、図３に示す、スパウト１を前後中央部で切断した断面図のように、フランジ部１２は、その一部が予め形成したインサート部材１３からなり、インサート部材１３を成型金型にセットして、スパウト１をインサートインジェクションにより成型している。   The spout 1 of the spigot 100 of this example is composed of an insert member 13 having a part formed in advance, as shown in FIG. The member 13 is set in a molding die, and the spout 1 is molded by insert injection.

そして、図４に示すように、液体用紙容器本体２００の口栓取り付け用開孔部の周囲に、フランジ部１２のインサート部材１３がシールされて口栓１００のスパウト１が取り付けられている。このため、液体用紙容器を使用後廃棄するときに、液体用紙容器の口栓１００の取り付けられている屋根板を押し潰すように曲げて、スパウト１を外側に引っ張ると、インサート部材１３を液体用紙容器本体２００に残してその他の部分を分離して、図５のように、取り外すことができる。   As shown in FIG. 4, the insert member 13 of the flange portion 12 is sealed and the spout 1 of the plug 100 is attached around the opening portion for attaching the plug of the liquid paper container main body 200. For this reason, when the liquid paper container is discarded after use, if the roof plate to which the stopper 100 of the liquid paper container is attached is bent and the spout 1 is pulled outward, the insert member 13 is moved to the liquid paper. Other parts can be separated from the container body 200 and removed as shown in FIG.

液体用紙容器本体２００には、インサート部材１３しか残っていないので、液体用紙容器本体２００を紙の分別回収に廻すことができ、環境にやさしい。尚、引っ張って分離するときにときは、スパウト１にキャップ２を嵌めたまま引っ張る方が、引っ張りやすく、小さな力で取り外すことができる。   Since only the insert member 13 remains in the liquid paper container main body 200, the liquid paper container main body 200 can be used for separating and collecting paper, which is environmentally friendly. When separating by pulling, it is easier to pull the cap with the cap 2 on the spout 1 and it can be removed with a small force.

口栓１００のスパウト１は、インサートインジェクション成型により製造する。すなわち、インサート部材１３を予め形成させておく、このインサート部材１３は真ん中に丸い孔の開いた円盤状なので色々な成型方法があるが、本例では予めインジェクションにて成型して置く。   The spout 1 of the plug 100 is manufactured by insert injection molding. That is, the insert member 13 is formed in advance. Since the insert member 13 has a disk shape with a round hole in the middle, there are various molding methods. In this example, the insert member 13 is previously molded by injection.

この予め形成しておいたインサート部材１３を成型金型に挿入し、インサートインジェクションにより、スパウト１を成型する。このとき、インサート部材１３は、溶融した樹脂により表面が溶融して融着し一体となったスパウト１として成型される。   The insert member 13 formed in advance is inserted into a molding die, and the spout 1 is molded by insert injection. At this time, the insert member 13 is molded as a spout 1 in which the surface is melted and fused with the molten resin to be integrated.

液体用紙容器２００の内面の熱可塑性樹脂が低密度ポリエチレンなどのポリエチレンであれば、スパウト１を成型する樹脂もまた、低密度ポリエチレン、あるいは、これに直鎖状低密度ポリエチレンを混ぜた混合樹脂を用いる。   If the thermoplastic resin on the inner surface of the liquid paper container 200 is polyethylene such as low density polyethylene, the resin for molding the spout 1 is also low density polyethylene or a mixed resin in which linear low density polyethylene is mixed. Use.

インサート部材１３には、ＭＦＲが、８〜２３ｇ／１０ｍｉｎ、密度が０．９１５〜０．９２０ｇ／ｃｍ２、曲げ弾性率が１２０〜１５０ＭＰａの範囲の低密度ポリエチレンを好ましく用いることができる。 For the insert member 13, low density polyethylene having an MFR of 8 to 23 g / 10 min, a density of 0.915 to 0.920 g / cm 2 , and a flexural modulus of 120 to 150 MPa can be preferably used.

このような樹脂であれば、インサートインジェクション成型において、溶融した樹脂が注入されたときに、インサート部材１３の溶融樹脂と接した部分の表面近傍が溶融して注入された溶融樹脂に融着し、冷却により一体化される。尚、インサート部材１３以外の部分を成型する樹脂もインサート部材１３と同様な樹脂が用いられる。   If it is such a resin, in the insert injection molding, when the molten resin is injected, the surface vicinity of the portion of the insert member 13 in contact with the molten resin is melted and fused to the injected molten resin, It is integrated by cooling. In addition, the resin similar to that of the insert member 13 is used as the resin for molding the portion other than the insert member 13.

また、キャップ２は、スパウト１に打栓できるように有る程度の柔軟性があることが好ましく、ポリエチレンやポリプロピレンなどの熱可塑性樹脂が好ましく用いることができる。キャップ２も、インジェクション成型などにより製造することができる。   Moreover, it is preferable that the cap 2 has a certain degree of flexibility so that the spout 1 can be plugged, and a thermoplastic resin such as polyethylene or polypropylene can be preferably used. The cap 2 can also be manufactured by injection molding or the like.

尚、本例においては、口栓をスパウトの注出部の外周面に雄螺子を設け、キャップの内周面に雌螺子を設けたスクリュウキャップとしたが、スパウトにヒンジ部を設け、ヒンジ部を介してキャップを連接したヒンジキャップとしてもよい。   In this example, the spout is a screw cap provided with a male screw on the outer peripheral surface of the spout portion of the spout and a female screw provided on the inner peripheral surface of the cap. However, the hinge portion is provided on the spout with a hinge portion. It is good also as a hinge cap which connected the cap through.

また、口栓１００が取り付けられる液体用紙容器本体２００は、ミルクカートン原紙等
の板紙の内外面にそれぞれ熱可塑性樹脂を設けた積層材料が好ましく用いられる。ガスバリア性などが必要な場合は、板紙と内面の熱可塑性樹脂との間に、バリア層を設ける。 The liquid paper container body 200 to which the stopper 100 is attached is preferably a laminated material in which a thermoplastic resin is provided on the inner and outer surfaces of a paperboard such as milk carton base paper. When gas barrier properties are required, a barrier layer is provided between the paperboard and the thermoplastic resin on the inner surface.

バリア層としては、無機酸化物蒸着フィルムが好ましく用いられる。蒸着する無機酸化物はシリカやアルミナなどが好ましく用いられる。また、無機酸化物蒸着フィルムの基材フィルムとしては、ポリエチレンテレフタレート、ナイロン、ポリプロピレンなどの樹脂フィルムが用いられる。特に２軸延伸した樹脂フィルムが、貼り合わせ加工や、蒸着加工時に、伸縮が少ないので好ましく用いられる。バリア層にアルミニウム箔を用いることもできるが、分別回収して紙に再生するのにはあまり向いていない。   As the barrier layer, an inorganic oxide vapor deposited film is preferably used. As the inorganic oxide to be deposited, silica, alumina or the like is preferably used. Moreover, as a base film of an inorganic oxide vapor deposition film, resin films, such as a polyethylene terephthalate, nylon, a polypropylene, are used. In particular, a biaxially stretched resin film is preferably used because there is little expansion and contraction during the bonding process and the vapor deposition process. An aluminum foil can also be used for the barrier layer, but it is not suitable for separating and collecting and recycling to paper.

液体用紙容器の形状は、本例の図２では、ゲーベルトップ型（切妻屋根型）の液体用紙容器であるが、これに限ることなく、天部が平らなブリック型（レンガ型）の液体用紙容器、また、天部の前方が傾斜部で後部が平らな液体用紙容器などでもかまわない。液体用紙容器本体の口栓取り付け用開孔部に口栓を取り付ける液体用紙容器であればよい。   In FIG. 2 of this example, the shape of the liquid paper container is a gable top type (gable roof type) liquid paper container, but is not limited to this, and a brick type (brick type) liquid paper with a flat top. The container may also be a liquid paper container or the like in which the front part of the top part is an inclined part and the rear part is flat. Any liquid paper container may be used as long as the stopper is attached to the opening for attaching the stopper of the liquid paper container body.

本例の口栓１００のスパウト１は、前述のような樹脂を用いてインサートインジェクションにより成型されているので、インサート成型でない、一回で全体をインジェクション成型により製造する通常成型のものと同様なシール条件（表１参照）で超音波シールにより、液体用紙容器本体２００に取り付けることができる。   The spout 1 of the spigot 100 of this example is molded by insert injection using the resin as described above. Therefore, it is not insert molding, but the same seal as that of normal molding manufactured by injection molding at once. It can be attached to the liquid paper container main body 200 by ultrasonic sealing under conditions (see Table 1).

Figure 0006565264
そして、超音波シール後のフランジ部１２からの液漏れと、密着性を比較すると、表１に示すように、通常成型した従来の口栓同様に、ピンホールなどにより液漏れしたものはなかった。
Figure 0006565264
 And when the liquid leakage from the flange part 12 after ultrasonic sealing was compared with the adhesiveness, as shown in Table 1, there was no liquid leakage due to a pinhole or the like, as in the case of a conventionally formed conventional plug. .

そして、液体用紙容器本体２００を押し潰すようにした状態で、口栓１００のキャップ２を持って、斜めに引っ張り上げると、インサートインジェクションで成型したスパウト１を用いた口栓１００では、インサート部材１３が液体用紙容器本体２００に残った状態で、キャップ２とスパウト１の注出部１１を取り去ることができた。   When the liquid paper container main body 200 is crushed and the cap 2 of the cap 100 is held and pulled obliquely, the plug 100 using the spout 1 molded by insert injection has the insert member 13. Was removed from the liquid paper container body 200, and the cap 2 and the spout 11 of the spout 1 could be removed.

また、密着性を調べるために、残ったインサート部材１３を液体用紙容器本体２００から剥がすと、液体用紙容器本体２００の板紙が層間剥離して剥がれ、紙剥けの状態になり、インサートインジェクションにより成型されたものも、シールムラがなく密着していた。   Further, when the remaining insert member 13 is peeled off from the liquid paper container main body 200 in order to check the adhesion, the paperboard of the liquid paper container main body 200 is peeled off by delamination, resulting in a paper peeling state, which is molded by insert injection. The sticks were also in close contact with no seal unevenness.

以上のように、本発明の液体用紙容器の口栓とそれを取り付けた液体用紙容器は、フランジ部の少なくとも液体用紙容器本体とシールする部分を予め形成したインサート部材として、スパウトをインサートインジェクションにより成型しているので、液体用紙容器本体への口栓の溶着時に、フランジ部にピンホールが開く恐れがなく、密着性も良好であり、使用後はインサート部材１３を液体用紙容器本体に残したまま、スパウトの注出部を液体用紙容器本体から取り外すことが容易にでき、紙の分別回収に適して、環境にやさしい。   As described above, the spout of the liquid paper container of the present invention and the liquid paper container to which the liquid paper container is attached are formed by insert injection with a spout formed as an insert member in which at least a portion of the flange portion to be sealed with the liquid paper container main body is formed in advance. Therefore, there is no fear that a pinhole will open in the flange portion when the plug is welded to the liquid paper container body, and the adhesiveness is good, and the insert member 13 remains in the liquid paper container body after use. The spout pouring part can be easily removed from the liquid paper container body, making it suitable for separating and collecting paper and being environmentally friendly.

１００・・・口栓
１・・・スパウト
１１・・・注出部
１２・・・フランジ部
１３・・・インサート部材
２・・・キャップ
２００・・・液体用紙容器本体 DESCRIPTION OF SYMBOLS 100 ... Mouth plug 1 ... Spout 11 ... Extraction part 12 ... Flange part 13 ... Insert member 2 ... Cap 200 ... Liquid paper container main body

Claims (2)

液体用紙容器本体に取り付ける口栓であって、スパウトとキャップとからなり、前記スパウトは、注出路となる注出部と、前記注出部の下端部分から外方に伸びるフランジ部とからなり、前記フランジ部の少なくとも液体用紙容器本体とシールする部分を予め形成した中央に丸い孔の開いた円盤状のインサート部材として、前記スパウトをインサートインジェクションにより成型したことを特徴とする液体用紙容器の口栓。 A spout attached to the liquid paper container main body, comprising a spout and a cap, the spout comprising a pouring portion serving as a pouring path and a flange portion extending outward from a lower end portion of the pouring portion, The spout of the liquid paper container, wherein the spout is molded by insert injection as a disk-shaped insert member having a round hole in the center, in which at least a portion to be sealed with the main body of the liquid paper container is formed in advance. . 請求項１に記載の口栓を取り付けたことを特徴とする液体用紙容器。
A liquid paper container having the cap according to claim 1 attached thereto.
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