JP2000006944A - Pressure-resistant paper container - Google Patents
Pressure-resistant paper containerInfo
- Publication number
- JP2000006944A JP2000006944A JP17938998A JP17938998A JP2000006944A JP 2000006944 A JP2000006944 A JP 2000006944A JP 17938998 A JP17938998 A JP 17938998A JP 17938998 A JP17938998 A JP 17938998A JP 2000006944 A JP2000006944 A JP 2000006944A
- Authority
- JP
- Japan
- Prior art keywords
- container
- layer
- container body
- lid
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Abstract
Description
【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に使用したと
きに、容器内の内圧の増大や減少に耐え、密封性が良好
な耐圧性紙容器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is useful for contents such as beverages containing carbonic acid and contents requiring heat sterilization, which withstands an increase or decrease of the internal pressure in a container and has a good sealing property. The present invention relates to a pressure-resistant paper container.
【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
ていた。この紙容器は、内容物を充填後に、容器の開口
部を蓋材で密封するものであるが、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、段差を生じてい
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, containers having various structures have been known as one-way containers for juices, soft drinks, etc. In general, paper containers such as paper cups have been widely used. This paper container, after filling the contents, is to seal the opening of the container with a lid material, but since the seam portion where the paper material is overlapped remains in the opening, there is 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、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、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ができるばかりでな
く、開封性も考慮した構成とすることもでき、液体内容
物を充填するのに適した容器であった。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 the contents from penetrating, etc., the molten plastic is directly injected into the paper container, and the protective part is formed integrally with the overlapping part of the container body, and the plastic ring part is formed integrally with the opening of the body part. These paper containers with plastic rings have strength in the opening and no step in the sealing part with the lid material. The container was suitable for filling the liquid content.
【０００４】[0004]
【発明が解決しようする課題】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、内圧上昇により、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, a thermoplastic resin or the like is adhered to the upper surface of a plastic ring portion by a heat fusion method. Therefore, a container filled with the contents of the container body, sealed with a lid material, in the distribution process,
For example, in the case of foamable contents, there are problems such as the lid material and the container body being significantly deformed due to the increase in the internal pressure, and the fusion part between the lid material and the container body being peeled off and causing liquid leakage. there were.
【０００５】本発明は、上述の従来の紙容器の問題点を
解決したものであり、容器内の内圧の増大や減少などの
変化により、蓋材や容器本体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な耐
圧性紙容器を提供するものである。The present invention has been made to solve the above-mentioned problems of the conventional paper container, and the lid member and the container main body are significantly deformed due to a change such as an increase or decrease of the internal pressure in the container, or a fusion portion. The present invention provides a pressure-resistant paper container that does not cause peeling of the paper and has good container sealing properties.
【０００６】[0006]
【課題を解決するための手段】本発明の第１の発明は、
図１に示すように、紙を主体層とし、少なくとも容器内
面側にプラスチック層を設けた胴部（１１１）及び底部
（１１２）とからなる紙容器（１１０）を、射出成形金
型内に載置し、型締めした後、溶融プラスチックを射出
して、胴部上端の開口部に蓋材と係合する周壁（１２
１）と接着部（１２３）とをもつプラスチックリング部
（１２０）を設け、胴部の容器内面側の重合部上に柱状
保護部を（１３０）を設け、胴部と底部との結合部上に
環状保護部（１４０）を設けた容器本体（１００）を、
バリア層を含む積層フィルムからなる天板（２１０）を
射出成形金型内に載置し、型締めした後、溶融プラスチ
ックを射出して、前記天板の外周に容器本体との係合部
（２２２）と接着部（２２３）とをもつ環状保護部（２
２０）を設けた蓋材（２００）で、図２に示すように、
前記容器本体（１００）のプラスチックリング部（１２
０）に前記蓋材（２００）の環状保護部（２２０）を係
合し、かつ本体及び蓋材と同材質あるいは融着可能なフ
ィルム（３００）を介して熱融着して密封したことを特
徴する耐圧性紙容器（１０）である。Means for Solving the Problems A first invention of the present invention is:
As shown in FIG. 1, a paper container (110) composed of a body (111) and a bottom (112) having paper as a main layer and a plastic layer provided at least on the inner surface side of the container is placed in an injection mold. After placing and closing the mold, the molten plastic is injected, and the peripheral wall (12
1) A plastic ring portion (120) having an adhesive portion (123) is provided, a columnar protective portion (130) is provided on a superposed portion on the inner surface side of the body of the container, and a joint portion between the body and the bottom is provided. A container body (100) provided with an annular protection portion (140),
A top plate (210) made of a laminated film including a barrier layer is placed in an injection molding die, and after clamping, the molten plastic is injected, and the outer peripheral portion of the top plate is engaged with a container body ( 222) and an annular protective portion (2) having an adhesive portion (223).
As shown in FIG. 2, the cover (200) provided with 20)
The plastic ring (12) of the container body (100)
0), the annular protective portion (220) of the lid member (200) is engaged, and the main body and the lid member are heat-sealed through the same material or a fusible film (300) for sealing. Characteristic pressure-resistant paper container (10).
【０００７】次に、本発明の第２の発明は、図１に示す
ように、前記容器本体（１００）の底部（１１２）及び
前記蓋材（２００）の天板（２１０）の容器内面側に、
格子状又は環状の補強リブ（１４１、２２４）を設けた
ことを特徴とする第１の発明に記載の耐圧性紙容器（１
０）である。Next, according to a second aspect of the present invention, as shown in FIG. 1, the bottom (112) of the container body (100) and the top plate (210) of the lid (200) are located on the inner side of the container. To
The pressure-resistant paper container (1) according to the first invention, wherein a lattice-like or annular reinforcing rib (141, 224) is provided.
0).
【０００８】次に、本発明の第３の発明は、図１に示す
ように、前記蓋材（２００）の天板（２１０）又は前記
容器本体（１００）の底部（１１２）に開封可能な注出
孔（２１１）を設けたことを特徴とする第１の発明又は
第２の発明に記載の耐圧性紙容器（１０）である。Next, according to a third aspect of the present invention, as shown in FIG. 1, the lid (200) can be opened on the top plate (210) of the lid (200) or on the bottom (112) of the container body (100). The pressure-resistant paper container (10) according to the first or second invention, characterized in that an ejection hole (211) is provided.
【０００９】次に、本発明の第４の発明は、図１及び図
２に示すように、前記注出孔（２１１）を封止フィルム
（２３０）で開封可能に封止したことを特徴とする第３
の発明に記載の耐圧性紙容器（１０）である。Next, according to a fourth aspect of the present invention, as shown in FIGS. 1 and 2, the pouring hole (211) is sealed by a sealing film (230) so as to be opened. Third
A pressure-resistant paper container (10) according to the invention.
【００１０】[0010]
【作用】本発明の耐圧性紙容器は、容器本体がインサー
ト射出成形によって、紙容器の開口部にプラスチックリ
ング部を設け、胴部の重合部上にプラスチックの柱状保
護部を設け、胴部と底部の結合部上にプラスチックの環
状保護部を設けて、強度が補強されており、この容器本
体の開口部のプラスチックリング部に、蓋材が嵌合と熱
溶着との併用でしっかりと装着している。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、容器本体と蓋材との封止状態が破損されることがな
く、容器の密封性が良好である。According to the pressure-resistant paper container of the present invention, the container body is provided with a plastic ring portion at the opening of the paper container by insert injection molding, and a plastic columnar protection portion is provided on the overlapping portion of the body portion. A plastic annular protective part is provided on the bottom joint part to reinforce the strength, and the lid material is securely attached to the plastic ring part at the opening of this container body by using both fitting and heat welding. ing. For this reason, 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 lid member is not damaged, and the container has good sealing performance.
【００１１】容器本体と蓋材との熱融着において、プラ
スチックフィルムを利用してこれを超音波シール時に溶
着して接合させるため、射出成形でエネルギーダイレク
ターを設ける必要がなくなり成形金型の構造が容易とな
る。プラスチックフィルムの材質は、容器本体と蓋材と
に接着可能な樹脂であればよく、これにより通常の超音
波シール法に比べ、容器本体と蓋材が同材質に限定しな
くてすみ、材質選定の巾が広がる。[0011] In the heat fusion between the container body and the lid member, a plastic film is used for welding and bonding at the time of ultrasonic sealing, so that it is not necessary to provide an energy director by injection molding, and the structure of the molding die is reduced. Becomes easier. The material of the plastic film may be any resin that can be adhered to the container body and the lid material, which eliminates the need to limit the container body and the lid material to the same material compared to the ordinary ultrasonic sealing method, and selects the material. Spreads.
【００１２】また、容器本体の底部及び蓋材の天板の容
器内面側に、格子状又は環状の補強リブを設けた本発明
の耐圧性紙容器は、補強リブの剛性により、容器内の内
圧変動に対し、容器が変形しにくい。Further, the pressure-resistant paper container of the present invention in which lattice-shaped or annular reinforcing ribs are provided on the bottom of the container body and on the inner surface side of the top plate of the lid member, the internal pressure inside the container is increased due to the rigidity of the reinforcing ribs. The container is less likely to deform due to fluctuations.
【００１３】[0013]
【発明の実施の形態】本発明の一実施形態の耐圧性紙容
器は、容器本体とこの容器本体の開口部に係合すると共
に、環状フィルムを介して熱融着により装着する蓋材と
から構成される。容器本体は、まず、紙層を主体層と
し、少なくとも容器内面側にポリエチレンなどのプラス
チック層を設けた、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て、胴部
の下方内周縁部に底部の周縁部を加熱状態で巻締めして
一体化した紙容器を作製し、次に、この紙容器を射出成
形金型内に載置し、型締めした後、ポリエチレンなどの
溶融プラスチックを金型のキャビティ（雌型と雄型の間
の空間）内に射出して、紙容器の開口部に蓋材と係合す
る周壁と、接着する接着部をもつプラスチックリング部
を、胴部の重合部上に柱状保護部を、胴部と底部の結合
部状に環状保護部を形成させて作製するものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS A pressure-resistant paper container according to one embodiment of the present invention comprises a container main body and a lid material which is engaged with an opening of the container main body and which is attached by thermal fusion via an annular film. Be composed. The container body has a paper layer as a main layer and a plastic layer such as polyethylene provided at least on the inner surface side of the container. For example, a polyethylene layer / paper layer / polyethylene layer structure, a polyethylene layer / paper layer / polyethylene layer / aluminum foil Layer / adhesive 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, etc. Using the laminated material of the above, a paper container was formed by winding the bottom peripheral edge to the lower inner peripheral portion of the body portion in a heated state, and then integrating the paper container into an injection mold. After placing and closing the mold, molten plastic such as polyethylene is injected into the cavity of the mold (the space between the female and male molds) to open the paper container. A plastic ring part having a peripheral wall that engages with the lid material and an adhesive part to be adhered, a columnar protective part is formed on the overlapped part of the trunk part, and an annular protective part is formed in the joint part of the trunk part and the bottom part. Is what you do.
【００１４】蓋材は、バリア層を含み少なくとも容器内
面側にポリエチレンなどのプラスチック層を設けた、例
えば、ポリエチレン層／アルミニウム箔層／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て作製した板状の
天板であるインサート部材を、射出成形金型内に載置
し、型締めした後、ポリエチレンなどの溶融プラスチッ
クを金型のキャビティ内に射出して、インサート部材の
外周縁部に、プラスチックリング部の周壁に係合する係
合部と、プラスチックリング部の接着部と熱融着する接
着部を持つ周壁からなる環状保護部を形成させた蓋材を
作製するものである。The cover material includes a barrier layer and a plastic layer such as polyethylene at least on the inner surface side of the container. For example, a polyethylene layer / aluminum foil layer / polyethylene layer structure, a polyethylene layer / paper layer / polyethylene layer / aluminum foil layer / Adhesive 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 An insert member, which is a plate-shaped top plate made using the laminated material, is placed in an injection molding die, and after clamping, the molten plastic such as polyethylene is injected into the cavity of the die, and the insert is inserted. An engaging portion that engages with the peripheral wall of the plastic ring portion and a plastic It is intended to produce a lid member to form a cyclic protecting portion comprising a peripheral wall having an adhesive portion to thermally fuse the adhesive portion of the ring portion.
【００１５】そして、容器本体に内容物を充填したの
ち、容器本体のプラスチックリング部の接着部上に容器
本体と蓋材との同一材料あるいは、何れにも接着可能な
環状フィルムをのせておき、容器本体のプラスチックリ
ング部の係合部に蓋材の周壁の係合部を嵌着して蓋材を
装着する。次に容器本体のプラスチックリング部の接着
部と蓋材の接着部とを超音波加工してサンドイッチされ
ているフィルムを熱融着して、容器を封止するものであ
る。After the container body is filled with the contents, an annular film that can be adhered to the same material as the container body and the lid member, or both, is placed on the adhesive portion of the plastic ring portion of the container body. The cover is attached by fitting the engagement of the peripheral wall of the cover to the engagement of the plastic ring of the container body. Next, the bonded portion of the plastic ring portion of the container body and the bonded portion of the lid member are subjected to ultrasonic processing, and the sandwiched film is thermally fused to seal the container.
【００１６】また、本発明では容器本体と蓋材の係合部
を嵌着しているが、これに限定されることなく螺合や圧
入による方式でも差し障りがない。Further, in the present invention, the engaging portion between the container body and the lid member is fitted. However, the present invention is not limited to this, and there is no problem even if a method by screwing or press fitting is used.
【００１７】本発明の耐圧性容器は、さらに、容器の強
度を増すために、蓋材の天板の容器内面側に、格子状又
は環状などの補強リブを設けてもよく、また、同様に容
器本体の底部の容器内面側にも格子状又は環状などの補
強リブを設けてもよい。この補強リブの形状は、特に限
定するものではないが、断面形状が長方形、凸字状、Ｌ
字状のものが好ましい。The pressure-resistant container of the present invention may further include a grid-like or annular reinforcing rib on the inner surface side of the top plate of the lid material in order to increase the strength of the container. A reinforcing rib having a lattice shape or an annular shape may be provided on the inner side of the container at the bottom of the container body. The shape of the reinforcing rib is not particularly limited, but the cross-sectional shape is rectangular, convex, L-shaped.
A letter shape is preferred.
【００１８】また、内容物の注出時の使用しやすさを考
慮して、蓋材の天板に、開封可能な注出孔を設けてもよ
く、また、容器本体の底部にも同様に開封可能な注出孔
を設けてもよい。通常では、この注出孔は、封止フィル
ムを容器外面側に剥離可能に貼着して封止するものであ
る。Further, in consideration of ease of use when the contents are poured out, an opening can be provided on the top plate of the lid member, and the bottom of the container body can be similarly opened. An openable pouring hole may be provided. Normally, the pouring hole is used to seal the sealing film on the outer surface side of the container by peelably attaching the sealing film.
【００１９】なお、この封止フィルムは、蓋材接触層に
蓋材との熱融着層を有する単体又は積層フィルムを用い
ればよく、バリア性を必要とする場合には、熱融着層の
外側層に金属箔層、金属又は酸化珪素等の無機物を蒸着
した熱可塑性樹脂フィルム又は紙よりなる層、エチレン
−ビニルアルコール共重合体樹脂層、ポリアミド樹脂
層、ポリ塩化ビニリデン樹脂層の少なくともいずれか一
層を有する積層フィルムを用いるものである。The sealing film may be a single film or a laminated film having a heat-sealing layer with the cover material in the cover material contact layer. If a barrier property is required, the heat-sealing layer may be used. A metal foil layer on the outer layer, a layer made of a thermoplastic resin film or paper on which an inorganic substance such as metal or silicon oxide is deposited, at least one of an ethylene-vinyl alcohol copolymer resin layer, a polyamide resin layer, and a polyvinylidene chloride resin layer A laminated film having one layer is used.
【００２０】[0020]
【実施例】次に本発明の実施例を具体的に説明する。 〈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）構成からなる積層材料を用い
て、胴部の下方内周縁部に底部の周縁部を加熱状態で巻
締めして一体化して外径φ６６、高さ１２０ｍｍの紙容
器を作製した。Next, an embodiment of the present invention will be described specifically. 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 deposited film (500 °) / polyethylene Using a laminated material having a layer (60 μm) configuration, the bottom peripheral edge was wound around the lower inner peripheral edge of the body in a heated state and integrated to produce a paper container having an outer diameter of 66 and a height of 120 mm.
【００２１】次に、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金型のキャビテ
ィ内に射出して、図１に示すように、紙容器（１１０）
の開口部に蓋材と係合する周壁（１２１）と、接着する
接着部（１２３）をもつプラスチックリング部（１２
０）を、胴部（１１１）の重合部上に柱状保護部（１３
０）を、胴部と底部（１１２）の結合部上に環状保護部
（１４０）を形成させた容器本体（１００）を作製し
た。Next, the paper container 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.
A plastic ring portion (12) having a peripheral wall (121) engaging with a lid material in an opening of
0) on the overlapping portion of the trunk portion (111).
No. 0), a container body (100) was prepared in which an annular protective portion (140) was formed on the joint between the trunk portion and the bottom portion (112).
【００２２】また、これとは別個に、図１に示すよう
に、ポリエチレン層（２０μｍ）／紙層（３２０ｇ／ｍ
2 ）／ポリエチレン（３５μｍ）／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）構成の積層材料からな
り、注出孔にアルミニウム箔層（５０μｍ）／ポリエチ
レンテレフタレート（１２μｍ）／積層フィルム（４５
μｍ）（ポリエチレン層／ポリ塩化ビニリデン層／ポリ
エチレン層）構成の封止フィルム（２３０）を開封可能
に熱融着した天板（２１０）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
ィ内に射出して、天板の外周に容器本体の周壁と咬合す
る係合部（２２２）と、容器本体の接着部と熱融着する
接着部（２２３）とをもつ環状保護部（２２０）を設け
た蓋材（２００）を作製した。Separately, as shown in FIG. 1, a polyethylene layer (20 μm) / paper layer (320 g / m
2 ) / Polyethylene (35 μm) / Polyethylene terephthalate layer (12 μm) / Evaporated silicon oxide film (500 °)
/ Polyethylene layer (60 μm) composed of laminated material, aluminum foil layer (50 μm) / polyethylene terephthalate (12 μm) / laminated film (45
μm) A top plate (210) in which a sealing film (230) having a configuration of (polyethylene layer / polyvinylidene chloride layer / polyethylene layer) is heat-sealed so as to be openable is placed in an injection molding die, and the mold is clamped. An engaging portion (222) that injects molten polyethylene into the cavity of the mold and engages the outer wall of the top plate with the peripheral wall of the container body, and an adhesive portion (223) that is thermally fused to the adhesive portion of the container body. The lid member (200) provided with the annular protective portion (220) having the above was prepared.
【００２３】次に、充填機で炭酸水を容器本体に充填し
たのち、図２に示すように、容器本体（１００）の開口
部に、厚み１００μｍの環状のポリエチレンフィルム
（３００）を介して蓋材（２００）を装着した。このと
き容器本体のプラスチックリング部（１２０）の周壁
（１２１）と蓋材の環状保護部（２２０）の係合部（２
２２）とは嵌合され、これを超音波シール法で、中間に
ある環状のポリエチレンフィルム（３００）を溶着して
容器本体のプラスチックリング部の接着部（１２３）と
蓋材の環状保護部の接着部（２２３）と接着して密封
し、内容量３５０ｍｌの本実施例の耐圧性紙容器（１
０）を作製した。Next, after filling the container body with carbonated water using a filling machine, as shown in FIG. 2, a lid is placed on the opening of the container body (100) via a 100 μm-thick annular polyethylene film (300). The material (200) was attached. At this time, the engaging portion (2) between the peripheral wall (121) of the plastic ring portion (120) of the container body and the annular protective portion (220) of the lid material.
22), which is welded with an ultrasonic sealing method to weld an intermediate annular polyethylene film (300) to form an adhesive portion (123) of the plastic ring portion of the container body and an annular protective portion of the lid member. The pressure-resistant paper container (1) of the present example having an internal capacity of 350 ml was adhered and sealed with the adhesive portion (223).
0) was prepared.
【００２４】そして、上述の本実施例の耐圧性紙容器
を、４０℃の雰囲気に１週間保存したのち、容器の外観
を観察したところ、外観性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。After the pressure-resistant paper container of the present embodiment was stored in an atmosphere at 40 ° C. for one week, the appearance of the container was observed. As a result, no noticeable deformation of the container was found to impair the appearance. No liquid leakage was observed.
【００２５】〈実施例２〉まず、実施例１と同様にし
て、紙容器を射出成形金型内に載置し、溶融ポリエチレ
ンを射出して、紙容器の開口部に蓋材と咬合する周壁と
接着部をもつプラスチックリング部を、胴部の重合部上
に柱状保護部を、胴部と底部の結合部上に環状保護部を
形成させた容器本体を作製した。<Embodiment 2> First, in the same manner as in Embodiment 1, a paper container is placed in an injection molding die, molten polyethylene is injected, and a peripheral wall that engages with a lid material at an opening of the paper container. A container body was prepared in which a plastic ring portion having an adhesive portion and a cylindrical protective portion was formed on a superposed portion of the body portion, and an annular protective portion was formed on a joint portion between the body portion and the bottom portion.
【００２６】次に、これとは別個に、ポリプロピレン層
（５０μｍ）／ポリエチレンテレフタレート層（９μ
ｍ）／紙層（２９５ｇ／ｍ2 ）／ポリエチレンテレフタ
レート層（１２μｍ）／酸化珪素蒸着膜（５００Å）／
ポリプロピレン層（５０μｍ）構成の積層材料からな
り、注出孔にアルミニウム箔層（５０μｍ）／ポリエチ
レンテレフタレート（１２μｍ）／積層フィルム（４５
μｍ）（ポリエチレン層／ポリ塩化ビニリデン層／ポリ
プロピレン層）構成の封止フィルムを開封可能に熱融着
した天板を射出成形金型内に載置し、溶融ポリプロピレ
ンを射出して、天板の外周に容器本体のプラスチックリ
ング部と咬合する係合部と、接着する接着部とをもつ環
状保護部を設けた蓋材を作製した。Next, separately from this, a polypropylene layer (50 μm) / polyethylene terephthalate layer (9 μm)
m) / paper layer (295 g / m 2 ) / polyethylene terephthalate layer (12 μm) / silicon oxide evaporated film (500 °) /
It is made of a laminated material having a polypropylene layer (50 μm) structure, and an aluminum foil layer (50 μm) / polyethylene terephthalate (12 μm) / laminated film (45
μm) A top plate in which a sealing film having a structure of (polyethylene layer / polyvinylidene chloride layer / polypropylene layer) is heat-sealed so as to be openable is placed in an injection molding die, and molten polypropylene is injected. A lid member having an annular protective portion on the outer periphery having an engaging portion that engages with the plastic ring portion of the container body and an adhesive portion that adheres was produced.
【００２７】そして、充填機で炭酸水を容器本体に充填
したのち、容器本体の開口部に、厚み５０μｍエチレン
ビニルアセテートフィルムを介して蓋材を装着した。こ
のとき容器本体のプラスチックリング部の周壁と蓋材の
環状保護部の係合部とは嵌合され、これを超音波シール
法で、エチレンビニルアセテートフィルムを溶着して容
器本体と蓋材とを密封した。After filling the container body with carbonated water using a filling machine, a lid material was attached to the opening of the container body via a 50 μm-thick ethylene vinyl acetate film. At this time, the peripheral wall of the plastic ring portion of the container body and the engaging portion of the annular protective portion of the lid material are fitted together, and this is welded with an ethylene vinyl acetate film by an ultrasonic sealing method, so that the container body and the lid material are joined together. Sealed.
【００２８】〈比較例１〉まず、実施例１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、開口部に蓋材と咬合する
周壁をもつプラスチックリング部を設け、胴部の容器内
面側の重合部上に柱状保護部を設け、胴部と底部との結
合部上に環状保護部を設けた容器本体を作製した。<Comparative Example 1> First, a paper container was placed in an injection mold and clamped in the same manner as in Example 1;
Inject the molten polyethylene, provide a plastic ring part with a peripheral wall that engages with the lid material at the opening, provide a columnar protective part on the overlapping part of the body on the inner surface side of the container, and on the joint between the body and the bottom A container body provided with an annular protective portion was prepared.
【００２９】次に、これとは別個に、実施例１と同様に
して、封止フィルムを熱融着した天板を、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、天板の外周に容器本体のプラスチックリング部と咬
合する係合部をもつ環状保護部を設けた蓋材を作製し
た。Next, separately from this, the top plate on which the sealing film was heat-sealed was placed in an injection mold and clamped. Injection was performed to produce a lid member provided with an annular protective portion having an engaging portion that engages with the plastic ring portion of the container body on the outer periphery of the top plate.
【００３０】そして、充填機で炭酸水を容器本体に充填
したのち、容器本体の開口部に、蓋材を装着し、容器本
体のプラスチックリング部の係合部と蓋材の環状保護部
の係合部とを嵌合させて密封し、内容量３５０ｍｌの本
比較例の耐圧性紙容器を作製した。After filling the container body with carbonated water using a filling machine, a lid member is attached to the opening of the container body, and the engagement between the plastic ring portion of the container body and the annular protection portion of the lid member is established. The mating part was fitted and sealed to produce a pressure-resistant paper container of the present comparative example having an inner capacity of 350 ml.
【００３１】〈比較例２〉まず、実施例１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、開口部に蓋材との接着部
をもつプラスチックリング部を設け、胴部の容器内面側
の重合部上に柱状保護部を設け、胴部と底部との結合部
上に環状保護部を設けた容器本体を作製した。<Comparative Example 2> First, a paper container was placed in an injection molding die and clamped in the same manner as in Example 1;
Inject the molten polyethylene, provide a plastic ring part with an adhesive part to the lid material at the opening, provide a columnar protective part on the overlapped part on the inner surface side of the body of the container, and on the joint between the body and the bottom A container body provided with an annular protective portion was prepared.
【００３２】次に、これとは別個に、実施例１と同様に
して、封止フィルムを熱融着した天板を、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、天板の外周に容器本体のプラスチックリング部と接
着する接着部をもつ環状保護部を設けた蓋材を作製し
た。Next, separately from this, the top plate on which the sealing film was heat-sealed was placed in an injection molding die and clamped. Injection was performed to produce a lid member provided with an annular protective portion having an adhesive portion that adheres to the plastic ring portion of the container body on the outer periphery of the top plate.
【００３３】次に、充填機で炭酸水を容器本体に充填し
たのち、容器本体の開口部に蓋材を装着した。これを超
音波シール法で溶着して容器本体のプラスチックリング
部の接着部と蓋材の環状保護部の接着部とを接着して密
封し、内容量３５０ｍｌの本比較例の耐圧性紙容器を作
製した。Next, after filling the container body with carbonated water using a filling machine, a lid member was attached to the opening of the container body. This is welded by an ultrasonic sealing method, and the adhesive portion of the plastic ring portion of the container body and the adhesive portion of the annular protective portion of the lid material are adhered and sealed to form a pressure-resistant paper container of the present comparative example having an internal capacity of 350 ml. Produced.
【００３４】上述した炭酸水を充填した実施例１及び２
と比較例１及び２の耐圧性紙容器を比較評価のために、
各１０本ずつの容器を４０℃の雰囲気に１週間保存した
のち、容器の外観、液漏れ、破損状態を調べた。その結
果を表１に示す。Examples 1 and 2 filled with carbonated water described above
And the pressure-resistant paper containers of Comparative Examples 1 and 2 for comparative evaluation.
After storing each of the ten containers in an atmosphere of 40 ° C. for one week, the appearance, liquid leakage, and damage of the containers were examined. Table 1 shows the results.
【００３５】[0035]
【表１】 [Table 1]
【００３６】各容器の評価結果では、表１に示すよう
に、２種類の実施例の耐圧性紙容器では、外観を損なう
変形、液漏れ、破損が認められなかったが、２種類の比
較例の容器には、係合部の異常、液漏れ、破損が認めら
れた。In the evaluation results of each container, as shown in Table 1, the two types of the pressure-resistant paper containers did not show any deformation, liquid leakage, or damage that impaired the appearance, but showed two types of comparative examples. Abnormality of the engaging portion, liquid leakage, and breakage were observed in the container of (1).
【００３７】[0037]
【発明の効果】本発明の耐圧性紙容器は、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し
ても、容器内の内圧の変動（増大又は減少）に耐え、外
観を損なうほどの著しい変形もなく、変形による容器本
体と蓋材との封止状態が破損されることがなく、容器の
密封性が良好である。The pressure-resistant paper container of the present invention resists fluctuations (increase or decrease) in the internal pressure of the container even when used for contents such as beverages containing carbonic acid or contents requiring heat sterilization. There is no significant deformation that impairs the appearance, and the sealed state between the container body and the lid member is not damaged by the deformation, and the container has good sealing performance.
【００３８】また、蓋材の天板又は容器本体の底部に開
封可能な注出孔を設けることもでき、新規の紙容器とい
っても過言ではない。Further, an openable pouring hole can be provided in the top plate of the lid member or the bottom of the container body, and it is no exaggeration to say that the container is a new paper container.
【図１】本発明の実施例１の耐圧性紙容器の容器本体と
蓋材の構造を示す断面図である。FIG. 1 is a sectional view showing the structure of a container body and a lid member of a pressure-resistant paper container according to a first embodiment of the present invention.
【図２】本発明の実施例１の耐圧性紙容器の容器本体に
蓋材を装着したときの状態を示す部分断面図である。FIG. 2 is a partial cross-sectional view showing a state in which a lid member is attached to a container body of the pressure-resistant paper container according to the first embodiment of the present invention.
１０‥‥耐圧性紙容器 １００‥‥容器本体 １１０‥‥紙容器 １１１‥‥胴部 １１２‥‥底部 １２０‥‥プラスチックリング部 １２１‥‥周壁 １２３、２２３‥‥接着部 １３０‥‥柱状保護部 １４０、２２０‥‥環状保護部 １４１、２２４‥‥補強リブ ２００‥‥蓋材 ２１０‥‥天板 ２１１‥‥注出孔 ２２２‥‥係合部 ２３０‥‥封止フィルム ３００‥‥環状フィルム 10 {pressure-resistant paper container 100} container body 110 {paper container 111} trunk 112 {bottom 120} plastic ring 121} peripheral wall 123, 223} adhesion 130} columnar protection 140 , 220 {circular protective part 141, 224} reinforcing rib 200 {lid material 210} top plate 211} pouring hole 222 {engagement part 230} sealing film 300 {circular film}
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4F206 AA04 AD05 AD06 AD20 AG03 AG23 AG28 AH55 AH57 JA07 JB12 JF05 JW34 4F211 AA04 AD05 AD06 AD20 AG03 AG23 AG28 AH55 AH57 TA01 TC16 TN22 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F206 AA04 AD05 AD06 AD20 AG03 AG23 AG28 AH55 AH57 JA07 JB12 JF05 JW34 4F211 AA04 AD05 AD06 AD20 AG03 AG23 AG28 AH55 AH57 TA01 TC16 TN22
Claims (4)
プラスチック層を設けた胴部及び底部とからなる紙容器
を、射出成形金型内に載置し、型締めした後、溶融プラ
スチックを射出して、胴部上端の開口部に、蓋材と係合
する周壁と接着部とをもつプラスチックリング部を設
け、胴部の容器内面側の重合部上に柱状保護部を設け、
胴部と底部との結合部上に環状保護部を設けた容器本体
を、バリア層を含む積層フィルムからなる天板を射出成
形金型に載置し、型締めした後、溶融プラスチックを射
出して、天板の外周に容器本体との係合部と接着部とを
もつ環状保護部を設けた蓋材で、前記容器本体のプラス
チックリング部に前記蓋材の環状保護部を係合し、かつ
環状フィルムを介して熱融着して密封したことを特徴す
る耐圧性紙容器。1. A paper container comprising paper as a main layer and a body portion and a bottom portion provided with a plastic layer at least on the inner surface side of the container is placed in an injection molding die, and after closing the mold, molten plastic is removed. By injecting, at the opening at the upper end of the trunk, a plastic ring part having a peripheral wall and an adhesive part that engages with the lid material is provided, and a columnar protective part is provided on the overlapping part on the inner surface side of the container of the trunk,
A container body provided with an annular protective portion on the joint between the body and the bottom is placed on a top plate made of a laminated film including a barrier layer in an injection molding die, and after clamping, the molten plastic is injected. A lid member provided with an annular protective portion having an engaging portion with the container body and an adhesive portion on the outer periphery of the top plate, and engaging the annular protective portion of the lid material with the plastic ring portion of the container body, A pressure-resistant paper container which is heat-sealed and sealed through an annular film.
容器内面側に、格子状又は環状の補強リブを設けたこと
を特徴とする請求項１記載の耐圧性紙容器。2. The pressure-resistant paper container according to claim 1, wherein a lattice-like or annular reinforcing rib is provided on the bottom of the container body and on the inner surface side of the top plate of the lid member.
開封可能な注出孔を設けたことを特徴とする請求項１又
は２記載の耐圧性紙容器。3. A pressure-resistant paper container according to claim 1, wherein an openable pouring hole is provided in the top plate of the lid member or the bottom of the container body.
止したことを特徴とする請求項３記載の耐圧性紙容器。4. The pressure-resistant paper container according to claim 3, wherein the pouring hole is sealed with a sealing film so as to be opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17938998A JP4099864B2 (en) | 1998-06-25 | 1998-06-25 | Pressure-resistant paper container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17938998A JP4099864B2 (en) | 1998-06-25 | 1998-06-25 | Pressure-resistant paper container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000006944A true JP2000006944A (en) | 2000-01-11 |
| JP4099864B2 JP4099864B2 (en) | 2008-06-11 |
Family
ID=16065017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17938998A Expired - Fee Related JP4099864B2 (en) | 1998-06-25 | 1998-06-25 | Pressure-resistant paper container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4099864B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014030047A1 (en) * | 2012-08-22 | 2014-02-27 | Stora Enso Oyj | Method for forming the rim of a package, package and moulding tool |
-
1998
- 1998-06-25 JP JP17938998A patent/JP4099864B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014030047A1 (en) * | 2012-08-22 | 2014-02-27 | Stora Enso Oyj | Method for forming the rim of a package, package and moulding tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4099864B2 (en) | 2008-06-11 |
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