JP2000281041A - Compound container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a compound container formed of mostly paper which is not drastically deformed by such a change as the increase or decrease of container inner pressure, does not generate peeling in a fused part, has superior airtight characteristics and is able to recap. SOLUTION: A paper container 110 which is joined with a bottom panel 112 at the inside bottom of a body part 111 made of a laminated material provided with at least a thermoplastic resin layer at the inner face side of the container is placed at a predetermined position in a metal die for injection molding. Melted thermoplastic resin is injected for providing an open peripheral edge frame on the open part 114 at the body top end of the paper container. A pillar shape protective frame 121 is provided on the longitudinal bonded part of the body container inner face side. On a container main body 100 open part having a ring shape protective frame 122 on the bonded part of the body part and the bottom panel, an arch shape thermoplastic resin container top part 200 provided with a discharge hole 210 at its top end is sealed by both heat fusion and physical contact.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、炭酸を含む飲料な
どの内容物や加熱殺菌を必要とする内容物を収納する紙
を主体とする複合容器に関するものであり、さらに詳し
くは、容器内の内圧の増大や減少に耐え密封性が良好で
リクローズ可能な複合容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper-based composite container for storing contents such as beverages containing carbonic acid and contents requiring heat sterilization. The present invention relates to a recloseable composite container that has good sealing performance and can withstand an increase or decrease in internal pressure.

【０００２】[0002]

【従来の技術】従来、ジュース、清涼飲料などのワンウ
ェイ容器としては、種々の構成の容器が知られている
が、一般的には、紙カップなどの紙容器が広く使用され
ている。この紙容器は、内容物を充填後に、容器の開口
部をシート状の蓋材でシールなどによって密封するもの
であるが、その開口部に、紙素材を重ね合わせた継ぎ目
部分が残っており、その継ぎ目部分が段差となるため、
密封性のよいシールが困難であった。2. Description of the Related Art Conventionally, various types of containers have been known as one-way containers for juices, soft drinks and the like, but generally, paper containers such as paper cups are widely used. In this paper container, after filling the contents, the opening of the container is sealed with a sheet-like lid material by a seal or the like, but at the opening, the seam portion where the paper material is overlapped remains. Because the joint part becomes a step,
It was difficult to achieve a good seal.

【０００３】そこで、蓋材のシールによる密封性を改良
するために、予め成形されたプラスチックリング部材
を、紙容器の開口部に、超音波などの手段によって接着
した紙容器が提案され、実用化されていた。更には、内
容物の浸透などを防ぐ目的で、紙容器に直接、溶融プラ
スチックを射出して、容器胴部の重合部に保護部を、胴
部の開口部にプラスチックリング部を一体成形した紙容
器が提案され、これらのプラスチックリング付き紙容器
は、その開口部に強度があり、蓋材とのシール部分に段
差がないので、密封性の優れたシールを可能としたばか
りでなく、開封性も考慮した構成とすることもでき、液
体内容物を充填するのに好適な容器であった。In order to improve the sealing property of the lid material by sealing, a paper container in which a preformed plastic ring member is bonded to the opening of the paper container by means such as ultrasonic waves has been proposed and put into practical use. It had been. Furthermore, in order to prevent penetration of the contents, etc., the molten plastic is directly injected into the paper container, and the protective part is integrally formed on the overlapping part of the container body, and the plastic ring part is formed integrally with the opening of the body part. Containers have been proposed.These paper containers with a plastic ring have strength at the opening and no step at the sealing part with the lid material. The container was also suitable for filling the liquid contents.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上述の
従来の紙容器は、紙シート、積層フィルム、熱可塑性樹
脂などの蓋材を、熱融着法によってプラスチックリング
部の上面に接着させた容器であるため、容器本体に内容
物を充填し、蓋材で密封した容器が、流通過程におい
て、例えば、発泡性内容物の場合には、内圧膨張によ
り、蓋材や容器本体が著しく変形したり、蓋材と容器本
体との融着部が剥離して液漏れを発生するなどの問題点
があった。However, the above-mentioned conventional paper container is a container in which a lid member such as a paper sheet, a laminated film, and a thermoplastic resin is adhered to the upper surface of a plastic ring portion by a heat fusion method. Therefore, the container body is filled with the contents, the container sealed with a lid material, in the distribution process, for example, in the case of foamable contents, due to internal pressure expansion, the lid material and the container body is significantly deformed, There has been such a problem that a fused portion between the lid member and the container body is peeled off, and a liquid leak occurs.

【０００５】また、上記従来の紙容器には再栓機能がな
いため蓋材を開封してしまうと最後まで一気に飲まなけ
ればならず保存性や持ち運びなどで非常に不便なもので
あった。Further, since the above-mentioned conventional paper container does not have a re-closing function, if the lid material is opened, it must be drunk all at once until the end, which is very inconvenient in terms of storage stability and portability.

【０００６】本発明は、かかる従来技術の問題点を解決
するものであり、その課題とするところは、容器内圧の
増大や減少などの変化により、容器が著しく変形した
り、融着部に剥離を生じることがなく、容器の密封性が
良好で再栓可能な複合容器を提供することにある。The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to remarkably deform the container due to a change such as an increase or decrease in the internal pressure of the container, or to peel off the fused portion. It is an object of the present invention to provide a composite container which can be re-plugged without causing the problem and having good container sealing properties.

【０００７】[0007]

【課題を解決するための手段】本発明に於いて上記課題
を達成するために、まず、請求項１の発明では、紙層を
主体とし、少なくとも容器内面側に熱可塑性樹脂層を設
けた積層材料からなる胴部の内側下方に底板を接合した
紙容器を、射出成形用金型内の所定の位置に載置し、キ
ャビティ内に溶融熱可塑性樹脂を射出して、前記紙容器
の胴部上端の開口部に開口周縁枠を設け、胴部の容器内
面側の縦の貼合せ部上に柱状保護枠を設け、且つ胴部と
底板との合わせ目上に環状保護枠を設けた容器本体の開
口部に、熱可塑性樹脂からなり上端部に注出孔が設置さ
れたアーチ状の容器上部を熱融着と物理的接合の併用に
よって封止したことを特徴とする複合容器としたもので
ある。Means for Solving the Problems In order to achieve the above object in the present invention, first, in the invention of claim 1, a laminate comprising a paper layer as a main body and a thermoplastic resin layer provided at least on the inner surface side of the container is provided. A paper container having a bottom plate joined to the inside lower part of a body made of a material is placed at a predetermined position in an injection mold, and a molten thermoplastic resin is injected into a cavity to form a body of the paper container. A container body in which an opening peripheral frame is provided in an opening at an upper end, a columnar protection frame is provided on a vertical bonding portion on the inner surface side of the body on the container side, and an annular protection frame is provided on a joint between the body and the bottom plate. The composite container is characterized in that the opening of the container is made of thermoplastic resin and the upper part of the arched container with the pouring hole at the upper end is sealed by a combination of heat fusion and physical bonding. is there.

【０００８】また、請求項２の発明では、前記容器本体
の底板の容器内面側に補強リブを設けたことを特徴とす
る請求項１記載の複合容器としたものである。According to a second aspect of the present invention, there is provided the composite container according to the first aspect, wherein a reinforcing rib is provided on the inner side of the bottom plate of the container body.

【０００９】また、請求項３の発明では、前記容器上部
の注出孔にキャップによる再栓を可能にする外ねじを設
けたことを特徴する請求項１または２記載の複合容器と
したものである。According to a third aspect of the present invention, there is provided the composite container according to the first or second aspect, wherein an external screw which enables re-closing by a cap is provided in the pouring hole on the upper portion of the container. is there.

【００１０】[0010]

【発明の実施の形態】以下本発明の実施の形態を図面を
用いて説明する。本発明の複合容器は、図１の側断面図
に示すように、紙層を主体とし、少なくとも容器内面側
に熱可塑性樹脂層を設けた積層材料からなる胴部（１１
１）の内側下方に底板（１１２）を接合した紙容器（１
１０）を、射出成形用金型（図示せず）内の所定の位置
に載置し、そのキャビティ内に溶融熱可塑性樹脂を射出
して、前記紙容器（１１０）の胴部（１１１）上端の開
口部（１１４）に開口周縁枠（１２０）を設け、胴部
（１１１）の容器内面側の縦の貼合せ部上に柱状保護枠
（１２１）を設け、且つ胴部（１１１）と底板（１１
２）との合わせ目上に環状保護枠（１２２）を設けた容
器本体（１００）の開口部（１１４）に、熱可塑性樹脂
からなり上端部に注出孔（２１０）が設けられたアーチ
状の容器上部（２００）を、図２の側断面図に示すよう
に、容器本体（１００）の熱融着部（１２３）と容器上
部（２００）の熱融着部（２２３）での熱融着と物理的
接合（この例では両者の嵌合部（１２４、２２４）での
嵌合）とによって封止した複合容器（１）である。Embodiments of the present invention will be described below with reference to the drawings. As shown in the side sectional view of FIG. 1, the composite container of the present invention has a trunk (11) made of a laminated material mainly composed of a paper layer and provided with a thermoplastic resin layer at least on the inner surface side of the container.
A paper container (1) in which a bottom plate (112) is joined to the lower inside of (1).
10) is placed at a predetermined position in an injection mold (not shown), a molten thermoplastic resin is injected into the cavity, and the upper end of the body (111) of the paper container (110). An opening peripheral frame (120) is provided in the opening (114) of the container, a columnar protective frame (121) is provided on the vertical bonding portion of the body (111) on the inner surface side of the container, and the body (111) and the bottom plate are provided. (11
2) The container body (100) provided with an annular protective frame (122) on the seam at the joint (2) has an opening (114) made of a thermoplastic resin and provided with a pouring hole (210) at the upper end. As shown in the side sectional view of FIG. 2, the upper part (200) of the container is heat-sealed at the heat-sealing part (123) of the container body (100) and the heat-sealing part (223) of the upper part (200) of the container. The composite container (1) is sealed by attachment and physical joining (in this example, fitting at the fitting portions (124, 224)).

【００１１】上記のような本発明の複合容器（１）は、
容器本体（１００）がインサート射出成形によって、紙
層を主体とした紙容器（１１０）の開口部（１１４）に
開口周縁枠（１２０）を設け、胴部（１１１）の重合部
上にプラスチックの柱状保護枠（１２１）を設け、胴部
（１１１）と底部（１１２）の結合部上にプラスチック
の環状保護枠（１２２）を設けることによって、強度が
補強され、この容器本体（１００）の開口部（１１４）
に、容器上部（２００）が物理的接合と熱融着とでしっ
かりと装着されている。このため、内容物によって容器
の内圧が変動（増大又は減少）しても、容器本体と容器
上部との封止状態が破損されることがなく、容器の密封
性を良好なものとすることができる。[0011] The composite container (1) of the present invention as described above comprises:
The container main body (100) is provided with an opening peripheral frame (120) at the opening (114) of the paper container (110) mainly composed of a paper layer by insert injection molding, and a plastic material is formed on the overlapping portion of the body (111). By providing a columnar protective frame (121) and a plastic annular protective frame (122) on the joint between the body (111) and the bottom (112), the strength is reinforced and the opening of the container body (100) is increased. Part (114)
In addition, the container top (200) is securely attached by physical bonding and heat fusion. Therefore, even if the internal pressure of the container fluctuates (increases or decreases) depending on the contents, the sealed state between the container body and the upper portion of the container is not damaged, and the container can be sealed well. it can.

【００１２】また、本発明は、図１に示すように、前記
容器本体（１００）の底板（１１２）の容器内面側に補
強リブ（１２６）を設けたことを特徴するものである。Further, the present invention is characterized in that, as shown in FIG. 1, a reinforcing rib (126) is provided on the inner side of the bottom plate (112) of the container body (100).

【００１３】このように、容器本体（１００）の底板
（１１２）の容器内面側に、補強リブ（１２６）を設け
ることによって、この補強リブ（１２６）の剛性によ
り、容器内の内圧変動に対し、容器が変形しにくいもの
とすることができる。As described above, by providing the reinforcing rib (126) on the inner surface side of the bottom plate (112) of the container body (100), the rigidity of the reinforcing rib (126) prevents the internal pressure fluctuation in the container. In addition, it is possible to make the container hardly deformed.

【００１４】さらにまた、本発明は、図１に示すよう
に、前記容器上部（２００）の注出孔（２１０）に、キ
ャップによる再栓を可能にする外ねじ（２１１）を設け
たことを特徴とするものである。Still further, according to the present invention, as shown in FIG. 1, an external screw (211) is provided at an outlet (210) of the container upper part (200) so as to be re-capable by a cap. It is a feature.

【００１５】このように、注出孔（２１０）にキャップ
が装着され再栓可能なものとすることによって、開封後
の保存性や持ち運びに対してたいへん便利で使用し易い
容器とすることができる。さらに、本体上部はアーチ状
形状を有し、容器内の内圧変動（主に増大）に対して変
形が小さいというメリットがある。As described above, the cap is attached to the spouting hole (210) so that it can be re-plugged, so that it is possible to obtain a container that is very convenient for storage and carrying after opening and easy to use. . Furthermore, the upper part of the main body has an arch shape, and there is an advantage that the deformation is small with respect to the internal pressure fluctuation (mainly increased) in the container.

【００１６】ここで、本発明の実施の形態を使用材料等
を含めさらに詳しく説明する。本発明の複合容器は、図
１に示す容器本体（１００）とこの容器本体の開口部に
熱融着と物理的接合の併用により装着する容器上部（２
００）から構成される。容器本体（１００）は、まず、
紙層を主体とし、少なくとも容器内面側にポリエチレン
などの熱可塑性樹脂層を設けたもので、例えば、ポリエ
チレン層／紙層／ポリエチレン層構成、ポリエチレン層
／紙層／ポリエチレン層／アルミニウム箔層／接着剤層
／ポリエチレンテレフタレート層／接着剤層／ポリエチ
レン層構成、ポリエチレン層／紙層／エチレン−アクリ
ル酸共重合体層／ポリエチレンテレフタレート層／酸化
珪素蒸着層／接着剤層／ポリエチレン層構成などの積層
材料を用い、胴部（１１１）下方内周縁部に底板（１１
２）の周縁部を加熱状態で巻締めして一体化した紙容器
（１１０）を作製する。次に、この紙容器（１１０）を
射出成形金型（図示せず）内に載置し、型締めした後、
ポリエチレンなどの溶融熱可塑性樹脂を金型のキャビテ
ィ内に射出して、紙容器（１１０）の開口部（１１４）
に容器上部（２００）との物理的接合部と熱融着部をも
つ開口周縁枠（１２０）を、胴部（１１１）の重合部上
に柱状保護枠（１２１）を、胴部（１１１）と底板（１
１２）の結合部上に環状保護枠（１２２）を形成させて
作製するものである。また図２に示すように、容器本体
（１００）と容器上部（２００）との封止は、物理的接
合手段として、嵌合、ネジ、圧入などの方法がとられ、
これと併用して超音波、高周波などの熱融着が行なわれ
る。Here, the embodiments of the present invention will be described in more detail including the materials used. The composite container of the present invention comprises a container body (100) shown in FIG. 1 and a container upper part (2) mounted on an opening of the container body by using both heat fusion and physical bonding.
00). First, the container body (100)
A layer mainly composed of a paper layer and provided with a thermoplastic resin layer such as polyethylene at least on the inner surface side of the container. For example, a polyethylene layer / paper layer / polyethylene layer structure, polyethylene layer / paper layer / polyethylene layer / aluminum foil layer / adhesion Laminated material such as agent layer / polyethylene terephthalate layer / adhesive layer / polyethylene layer structure, polyethylene layer / paper layer / ethylene-acrylic acid copolymer layer / polyethylene terephthalate layer / silicon oxide vapor deposited layer / adhesive layer / polyethylene layer structure Bottom plate (11)
The peripheral part of 2) is wound in a heated state to produce an integrated paper container (110). Next, the paper container (110) is placed in an injection mold (not shown), and after clamping,
A molten thermoplastic resin such as polyethylene is injected into the cavity of the mold, and the opening (114) of the paper container (110) is opened.
The opening peripheral frame (120) having a physical bonding portion with the container upper portion (200) and the heat-sealing portion, the columnar protective frame (121) on the overlapping portion of the body portion (111), and the body portion (111) And bottom plate (1
It is manufactured by forming an annular protective frame (122) on the joint of (12). As shown in FIG. 2, the container body (100) and the container upper part (200) are sealed by a method such as fitting, screwing, press-fitting or the like as a physical joining means.
In conjunction with this, heat fusion such as ultrasonic waves and high frequency is performed.

【００１７】上記容器上部（２００）は、熱融着の適性
から容器本体（１００）を補強した熱可塑性樹脂と同様
の材料で射出成形ならびに圧縮成形で作製される。その
形状は上端に向かってアーチ状の形態をとり、上端の注
出孔（２１０）には再栓可能なキャップが取り付けられ
ように外ねじ（２１２）が設けられており、注出孔（２
１０）は容器横断面に対しセンターの位置でもセンター
からはずれたオフセンターであったも差し障りがない。
一方下端の開口部には、容器本体との物理的接合部と熱
融着部とが形成されている。The upper part (200) of the container is made by injection molding and compression molding of the same material as the thermoplastic resin which reinforces the container body (100) because of its suitability for thermal fusion. The shape is arched toward the upper end, and an outer screw (212) is provided in the spout hole (210) at the upper end so that a re-sealable cap is attached.
In the case of 10), there is no problem even if the center is located off center from the center with respect to the cross section of the container.
On the other hand, a physical joint portion with the container body and a heat fusion portion are formed in the opening at the lower end.

【００１８】そして容器本体（１００）と容器上部（２
００）とが嵌合、ネジ、圧入などの物理的接合と超音波
シールや高周波シールなどの熱融着を併用して封止さ
れ、その後注出孔（２１０）より内容物が充填される。The container body (100) and the container upper part (2)
00) is sealed using physical bonding such as fitting, screwing, press-fitting and the like, and heat sealing such as ultrasonic sealing or high-frequency sealing, and then the contents are filled through the pouring hole (210).

【００１９】本発明の複合容器（１）は、さらに、容器
の強度を増すために、図１に示すように、容器本体（１
００）の底板（１１２）の容器内面側に格子状や環状な
どの補強リブ（１２６）を設けても良く、この補強リブ
（１２６）の形状は、特に限定するものではないが、断
面形状が長方形、凸形状、Ｌ字状のものなどが好まし
い。The composite container (1) of the present invention further comprises a container body (1) as shown in FIG. 1 for increasing the strength of the container.
00), a reinforcing rib (126) having a lattice shape or an annular shape may be provided on the inner surface side of the container of the bottom plate (112). The shape of the reinforcing rib (126) is not particularly limited, but the cross-sectional shape is not limited. A rectangular, convex, L-shaped or the like is preferable.

【００２０】[0020]

【実施例】次に本発明を実施例により具体的に説明す
る。 ＜実施例１＞まず、ポリエチレン層（２０μｍ）／紙層
（３２０ｇ／ｍ²）／ポリエチレン層（２０μｍ）／ポ
リエチレン層（１５μｍ）／ポリエチレンテレフタレー
ト層（１２μｍ）／酸化珪素蒸着膜（５００Å）／ポリ
エチレン層（６０μｍ）構成の積層材料を用いて、図１
に示す胴部（１１１）の下方内周縁部に底板（１１２）
の周縁部を加熱状態で巻締めして一体化した紙容器（１
１０）を作製した。Next, the present invention will be described in detail with reference to examples. Example 1 First, polyethylene layer (20 μm) / paper layer (320 g / m ² ) / polyethylene layer (20 μm) / polyethylene layer (15 μm) / polyethylene terephthalate layer (12 μm) / silicon oxide evaporated film (500 °) / polyethylene Using a laminated material having a layer (60 μm) configuration, FIG.
A bottom plate (112) is provided on the lower inner peripheral edge of the trunk (111) shown in FIG.
Paper container (1)
10) was produced.

【００２１】次に、この紙容器（１１０）を射出成形金
型内に載置し、型締めした後、溶融ポリエチレンを金型
のキャビティ内に射出し、図１に示すように、紙容器
（１１０）の開口部（１１４）に容器上部（２００）と
の咬合する嵌合部（１２４）と熱融着部（１２３）をも
つ開口周縁枠（１２０）を、胴部（１１１）の重合部上
に柱状保護枠（１２１）を、胴部（１１１）と底板（１
１２）の結合部上に環状保護枠（１２２）を形成させた
容器本体（１００）を作製した。Next, the paper container (110) is placed in an injection mold, and after clamping, the molten polyethylene is injected into the cavity of the mold, and as shown in FIG. An opening peripheral frame (120) having a fitting portion (124) that engages with the container upper portion (200) in the opening (114) of the container (110) and a heat-sealing portion (123) is overlapped with the body (111). The columnar protective frame (121) is placed on the top, the trunk (111) and the bottom plate (1).
A container body (100) having an annular protective frame (122) formed on the joint of (12) was produced.

【００２２】また、図１に示すように、これとは別個に
ポリエチレンを射出成形して下端の開口部に嵌合部（２
２４）と熱融着部（２２３）をもち、上端に外ねじ（２
１１）を設けた注出孔（２１０）を有する容器上部（２
００）を作製した。Further, as shown in FIG. 1, polyethylene is separately injection-molded and a fitting portion (2) is inserted into the opening at the lower end.
24) and a heat-sealed portion (223), and an external screw (2
11) The upper part of the container (2) having the pouring hole (210) provided with
00).

【００２３】次に、図２に示すように、容器本体（１０
０）の開口部（１１４）に、容器上部（２００）を装着
し、容器本体の開口周縁枠（１２０）の嵌合部（１２
４）と容器上部（２００）の嵌合部（２２４）とを咬合
させ、さらに超音波シール法で、容器本体（１００）の
開口周縁枠の熱融着部（１２３）と容器上部（２００）
の熱融着部（２２３）とを熱融着して密封し、充填機で
注出孔（２１０）より炭酸水を充填した後、外ねじ（２
１１）部にキャップ（図示せず）を施し内容量３５０ｍ
ｌの本実施例の複合容器（１）を作製した。Next, as shown in FIG.
0), the container upper part (200) is attached to the opening (114), and the fitting part (12) of the opening peripheral frame (120) of the container main body.
4) and the fitting part (224) of the upper part (200) of the container are engaged with each other, and the heat-sealed part (123) of the peripheral frame of the opening of the container body (100) and the upper part of the container (200) are further ultrasonically sealed.
Is sealed by heat-sealing with a heat-sealed portion (223) of the outer screw (2).
11) Cap (not shown) is applied to the part and the capacity is 350m
1 of the composite container (1) of this example was produced.

【００２４】そして、上述の本実施例の複合容器（１）
を、４０℃の環境下に１ケ月保存した後、容器の外観を
観察したところ、外観を損なうほどの著しい容器の変形
は見られず、また、液漏れを発生したものは、確認され
なかった。Then, the composite container (1) of the present embodiment described above.
Was stored for one month in an environment of 40 ° C., and the appearance of the container was observed. As a result, no significant deformation of the container was observed so as to impair the appearance, and no liquid leakage was observed. .

【００２５】＜実施例２＞まず、実施例１と同様の紙容
器を作製し、この紙容器を射出成形金型内に載置し、型
締めした後、溶融ポリエチレンを射出して、図３に示す
ように、胴部（１１１）上端の開口に容器上部（２０
０）と螺合するネジ部（１２５）を外周面にもつ開口周
縁枠（１２０）を設け、胴部（１１１）の容器内面側の
重合部上に柱状保護枠（１２１）を設け、胴部と底部と
の結合部上に環状保護枠（図示せず）を設けた容器本体
（１００）を、実施例１と同様に作製した。<Embodiment 2> First, a paper container similar to that of Embodiment 1 was prepared. This paper container was placed in an injection molding die, clamped, and then molten polyethylene was injected. As shown in the figure, the upper part of the container (20)
0), an opening peripheral frame (120) having an outer peripheral surface with a screw portion (125) to be screwed therein, and a columnar protective frame (121) provided on an overlapping portion of the body (111) on the inner surface side of the container. A container body (100) in which an annular protective frame (not shown) was provided on the joint between the and the bottom was produced in the same manner as in Example 1.

【００２６】次に、これとは別個にポリエチレンを射出
成形して下端の開口部に容器本体（１００）と螺合する
ネジ部（２２５）をもち、上端に注出孔（２１０）を設
けた容器上部（２００）を作製した。Next, separately from this, polyethylene is injection-molded to have a screw portion (225) for screwing with the container body (100) at the opening at the lower end, and a pouring hole (210) at the upper end. A container top (200) was made.

【００２７】そして、図３に示すように、容器本体（１
００）の開口部に、容器上部（２００）を装着し、容器
本体（１００）と容器上部（２００）とを螺合させ、さ
らに超音波シール法で、その融着面（１２７、２２７）
を熱融着して密封し、注出孔より充填機で炭酸水を充填
した後、注出孔（２１０）にキャップ（図示せず）を施
し内容量３５０ｍｌの本実施例の複合容器を作製した。Then, as shown in FIG.
00), the container upper part (200) is attached, the container main body (100) and the container upper part (200) are screwed together, and the fusion surfaces (127, 227) are further formed by ultrasonic sealing.
Is sealed by heat-sealing, and filled with carbonated water from a pouring hole by a filling machine. Then, a cap (not shown) is provided on the pouring hole (210) to produce a composite container of the present example having an inner capacity of 350 ml. did.

【００２８】また、本複合容器を実施例１と同様に、４
０℃の環境下に１ケ月保存した後、容器の外観を観察し
たところ、外観を損なうほどの著しい容器の変形は見ら
れず、また、液漏れを発生したものは、確認されなかっ
た。Further, this composite container was prepared in the same manner as in Example 1,
After storage for one month in an environment of 0 ° C., the appearance of the container was observed. As a result, no significant deformation of the container was found to impair the appearance, and no liquid leakage was observed.

【００２９】＜比較例＞まず、実施例２と同様にして、
紙容器を射出成形金型内に載置し、型締めした後、溶融
ポリエチレンを射出して、胴部上端の開口部に容器上部
と螺合するネジ部を外周面にもつ開口周縁枠を設け、胴
部の容器内面側の重合部上に柱状保護枠を設け、胴部と
底部との結合部上に環状保護枠を設けた容器本体を作製
した。<Comparative Example> First, in the same manner as in Example 2,
After placing the paper container in the injection molding die and clamping the mold, the molten polyethylene is injected, and an opening peripheral frame having an outer peripheral surface with a screw portion screwed to the upper part of the container is provided in the opening at the upper end of the body. Then, a column-shaped protective frame was provided on the overlapped portion of the body on the inner surface side of the container, and a container body was provided in which an annular protective frame was provided on a joint between the body and the bottom.

【００３０】次に、これとは別個に、実施例２と同様に
して、ポリエチレンを射出成形して下端の開口部に容器
本体と螺合するネジ部をもち、上端に注出孔を設けた容
器上部を作製した。Next, separately from this, polyethylene was injection-molded in the same manner as in Example 2, and the opening at the lower end was provided with a screw portion to be screwed with the container body, and the spouting hole was provided at the upper end. The upper part of the container was made.

【００３１】そして、容器本体の開口部に、容器上部を
装着し、容器本体と容器上部とを螺合させて密封し、注
出孔より充填機で炭酸水を充填した後、注出孔にキャッ
プを施し内容量３５０ｍｌの本実施例の複合容器を作製
した。Then, the upper part of the container is attached to the opening of the container body, the container body and the upper part of the container are screwed together and sealed. A composite container of this example having a cap of 350 ml was prepared by capping.

【００３２】本複合容器を、４０℃の環境下に１ケ月保
存した後、容器の外観を観察したところ、容器本体と容
器上部との係合部に異常が認められ、その隙間から液漏
れが発生した。After storing the composite container in an environment of 40 ° C. for one month, the appearance of the container was observed. As a result, an abnormality was found in the engaging portion between the container body and the upper part of the container, and liquid leakage from the gap. Occurred.

【００３３】[0033]

【発明の効果】本発明は以上の構成であるから、下記に
示す如き効果がある。即ち、容器本体がインサート射出
成形によって、紙容器の開口部に開口周縁枠を設け、胴
部の重合部上にプラスチックの柱状保護枠を設け、胴部
と底部の結合部上にプラスチックの環状保護枠を設けた
複合容器とすることによって、強度が補強され、この容
器本体の開口部に、本体上部が物理的接合と熱融着とで
しっかりと装着され、このため、炭酸を含む飲料などの
内容物や加熱殺菌を必要とする内容物の使用しても、容
器内の内圧の変動（増大または減少）に耐え、外観性を
損なうほどの著しい変形もなく、密封性の良好な容器と
することができる。As described above, the present invention has the following effects. That is, the container body is provided with an opening peripheral frame at the opening of the paper container by insert injection molding, a plastic columnar protective frame is provided on the overlapping portion of the body, and a plastic annular protection is provided on the joint between the body and the bottom. By using a composite container provided with a frame, the strength is reinforced, and the upper part of the main body is firmly attached to the opening of the container main body by physical bonding and heat fusion, and therefore, such as a beverage containing carbonic acid. Even if the contents or contents that require heat sterilization are used, the container withstands fluctuations (increase or decrease) of the internal pressure in the container, does not have significant deformation that impairs the appearance, and has a good sealability. be able to.

【００３４】また、容器本体の底板の容器内面側に、補
強リブを設けることによって、この補強リブの剛性によ
り、容器内の内圧変動に対し、容器がより変形しにくい
ものとすることができる。Further, by providing a reinforcing rib on the inner surface side of the bottom plate of the container body on the inner side of the container, the rigidity of the reinforcing rib can make the container less likely to be deformed due to a change in internal pressure in the container.

【００３５】さらにまた、注出孔に外ねじを設け、キャ
ップが装着され再栓可能なものとすることによって、開
封後の保存性や持ち運びに対してたいへん便利で使用し
易い容器とすることができる。さらに、本体上部はアー
チ状形状を有し、容器内の内圧変動（主に増大）に対し
て変形が小さいというメリットがある。Further, by providing an external screw in the pouring hole and attaching a cap so that the container can be re-opened, a container which is very convenient for storage and carrying after opening and is easy to use. it can. Furthermore, the upper part of the main body has an arch shape, and there is an advantage that the deformation is small with respect to the internal pressure fluctuation (mainly increased) in the container.

【００３６】従って本発明は、炭酸を含む飲料などの内
容物や加熱殺菌を必要とする内容物に使用する紙層を主
体とする液体複合容器において、優れた実用上の効果を
発揮する。Accordingly, the present invention exerts an excellent practical effect in a liquid composite container mainly composed of a paper layer used for contents such as beverages containing carbonic acid and contents requiring heat sterilization.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例における複合容器の容器本体
と容器上部の構造を側断面で表した説明図である。FIG. 1 is an explanatory view showing a cross section of a structure of a container main body and an upper portion of a container of a composite container according to an embodiment of the present invention.

【図２】本発明の一実施例における複合容器の容器本体
に容器上部を装着したときの状態を側部分断面で表した
説明図である。FIG. 2 is an explanatory view showing a state in which an upper portion of a container is mounted on a container body of the composite container according to an embodiment of the present invention in a partial side sectional view.

【図３】本発明の他の一実施例における複合容器の容器
本体と容器上部の構造を側断面で表した説明図である。FIG. 3 is an explanatory view showing a structure of a container main body and a container upper part of a composite container according to another embodiment of the present invention in a side cross section.

【符号の説明】[Explanation of symbols]

１‥‥複合容器 １００‥‥容器本体 １１０‥‥紙容器 １１１‥‥胴部 １１２‥‥底部 １１４‥‥開口部 １２０‥‥開口周縁枠 １２１‥‥柱状保護枠 １２２‥‥環状保護枠 １２３‥‥容器本体の熱融着部 １２４‥‥容器本体の嵌合部 １２５‥‥容器本体のねじ部 １２６‥‥補強リブ ２００‥‥容器上部 ２１０‥‥注出孔 ２１１‥‥外ねじ ２２３‥‥容器上部の熱融着部 ２２４‥‥容器上部の嵌合部 ２２５‥‥容器上部のねじ部 1 {composite container 100} container main body 110 {paper container 111} trunk 112 {bottom 114} opening 120 {opening peripheral frame 121} columnar protective frame 122 {annular protective frame 123} Heat-fused part of container body 124 {fitting part of container body 125} screw part of container body 126 {reinforcing rib 200} top of container 210 {pouring hole 211} external screw 223} top of container 224 部 Fitting part on top of container 225 ね じ Screw part on top of container

フロントページの続き Ｆターム(参考） 3E033 BA10 BA13 BA15 BA18 BB08 CA09 CA19 CA20 DA03 DA06 EA01 FA02 GA02 3E067 AA03 AB26 BA02A BB01A BB14A BB25A BC07A CA24 EB17 EB32 EE39 GD06 Continued on the front page F term (reference) 3E033 BA10 BA13 BA15 BA18 BB08 CA09 CA19 CA20 DA03 DA06 EA01 FA02 GA02 3E067 AA03 AB26 BA02A BB01A BB14A BB25A BC07A CA24 EB17 EB32 EE39 GD06

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】紙層を主体とし、少なくとも容器内面側に
熱可塑性樹脂層を設けた積層材料からなる胴部の内側下
方に底板を接合した紙容器を、射出成形用金型内の所定
の位置に載置し、キャビティ内に溶融熱可塑性樹脂を射
出して、前記紙容器の胴部上端の開口部に開口周縁枠を
設け、胴部の容器内面側の縦の貼合せ部上に柱状保護枠
を設け、且つ胴部と底板との合わせ目上に環状保護枠を
設けた容器本体の開口部に、熱可塑性樹脂からなり上端
部に注出孔が設置されたアーチ状の容器上部を熱融着と
物理的接合の併用によって封止したことを特徴とする複
合容器。1. A paper container having a paper plate as a main body and a bottom plate joined to an inner lower part of a body made of a laminated material having a thermoplastic resin layer provided at least on the inner surface side of the container. The molten thermoplastic resin is injected into the cavity, an opening peripheral frame is provided at the opening at the upper end of the body of the paper container, and a columnar shape is formed on the vertical bonding portion on the inner surface side of the body of the container. A protective frame is provided, and an opening of the container body is provided with an annular protective frame on the joint between the body and the bottom plate. A composite container sealed by a combination of heat fusion and physical bonding. 【請求項２】前記容器本体の底板の容器内面側に補強リ
ブを設けたことを特徴とする請求項１記載の複合容器。2. The composite container according to claim 1, wherein a reinforcing rib is provided on an inner surface side of the bottom plate of the container main body. 【請求項３】前記容器上部の注出孔に、キャップによる
再栓を可能にする外ねじを設けたことを特徴する請求項
１または２記載の複合容器。3. The composite container according to claim 1, wherein an external screw is provided in the spout hole on the upper portion of the container so as to be re-capable by a cap.