JP3389696B2 - Liquid paper container - Google Patents
Liquid paper containerInfo
- Publication number
- JP3389696B2 JP3389696B2 JP22338694A JP22338694A JP3389696B2 JP 3389696 B2 JP3389696 B2 JP 3389696B2 JP 22338694 A JP22338694 A JP 22338694A JP 22338694 A JP22338694 A JP 22338694A JP 3389696 B2 JP3389696 B2 JP 3389696B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- opening
- layer
- synthetic resin
- laminated material
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/70—Break-in flaps, or members adapted to be torn-off, to provide pouring openings
- B65D5/708—Separate tearable flexible elements covering a discharge opening of a container, e.g. adhesive tape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、封止シートで密封した
飲み口部を有する液体用紙容器に関するもので、詳しく
は、飲み口部における積層材料の開口部の端面が、内容
物に対して良好に保護されている液体用紙容器に関する
ものである。
【０００２】
【従来の技術】最近、果汁飲料、コーヒー、液体スー
プ、乳酸飲料などの液体食品の分野では、使用時の使い
易さと、使用後の廃棄処理のし易さから、例えば、図３
（ａ）及び（ｂ）に示すような、胴部材（１２０）に、
封止シート（１４０）で密封された飲み口部を有する天
部材（１１０）と、底部材（１３０）とを熱融着した積
層材料からなる液体用紙容器（１００）が、広い範囲で
使用されている。この液体用紙容器に使用される積層材
料は、合成樹脂層、紙層、金属箔層、金属蒸着薄膜層な
どからなる積層基材の最外層及び最内層に、熱融着性と
防水性をもつ合成樹脂層を設けたものであった。そし
て、この飲み口部の構造は、特公平６ー４９４９６号公
報などで開示されており、例えば、図４に示すように、
積層材料（１０）の最外層（１２）の合成樹脂層と最内
層（１３）の合成樹脂層とで、飲み口部の積層材料の開
口部（１１１）の端面（１４）を覆って、防水状態に接
着したものであった。
【０００３】
【発明が解決しようとする課題】しかしながら、前述の
積層材料の最外層と最内層との合成樹脂層により、飲み
口部の積層材料の開口部の端面を覆って防水状態に接着
する従来の方法は、最外層の合成樹脂層と最内層の合成
樹脂層との熱融着時に、積層材料の開口部の端面の状態
によっては、ピンホールや肉薄部分を発生することがあ
り、必ずしも、内容物に対する保護性が良好とは言えな
かった。
【０００４】本発明は、上述の従来法での問題点を解決
したものであり、飲み口部の積層材料の開口部の端面
を、防水性合成樹脂フィルムで良好な状態で覆って内容
物から保護する液体用紙容器である。
【０００５】
【課題を解決するための手段】本発明は、図１に示すよ
うに、容器を形成する積層材料（１０）の最外層（１
２）及び最内層（１３）が防水性合成樹脂層であり、且
つ、開封用シート（１４０）で密封した飲み口部を有す
る液体用紙容器において、飲み口部の積層材料（１０）
の開口部（１１１）を、外径が開口部（１１１）より大
きく、内径が開口部（１１１）より小さい環状の二枚の
防水性合成樹脂フィルム（２１，２２）で、容器外面と
容器内面とに接着し、且つ、容器外面に接着した防水性
合成樹脂フィルム（２１）と、容器内面に接着した防水
性合成樹脂フィルム（２２）との開口部（１１１）内側
の当接面を接着して、積層材料（１０）の開口部（１１
１）の端面（１４）を防水性合成樹脂フィルム（２１，
２２）で覆ったことを特徴とする液体用紙容器である。
【０００６】上述の防水性合成樹脂フィルム及び防水性
合成樹脂層の材質としては、低密度ポリエチレンや線状
低密度ポリエチレンなどのポリエチレン、必要に応じ
て、ポリエステル系コポリマーなどを用いる。
【０００７】また、防水性合成樹脂フィルムの積層材料
との接着及び防水性合成樹脂フィルム同士の接着は、通
常では、熱融着法で行うことが好ましい。
【０００８】
【作用】本発明の液体用紙容器は、飲み口部の積層材料
の開口部の端面を、従来の積層材料の最内層と最外層の
防水性樹脂層によって熱融着して覆うものとは異なり、
積層材料の最内層と最外層上に、別個の防水性樹脂フィ
ルムを用いて熱融着して覆うため、適切な材質やフィル
ムの厚みなどを容器の目的に合わせて設定でき、熱融着
時に発生し易いピンホールや薄肉部などを避けることが
できる。
【０００９】
【実施例】まず、図２に示すように、〔容器外側〕板紙
層（２２０ g/m2 ）／ポリエチレン層（２０μｍ厚）／
ポリエチレン層（１５μｍ厚）／二軸延伸ポリエチレン
テレフタレートフィルム層（１２μｍ厚）／酸化ケイ素
蒸着薄膜層（４００Å厚）〔容器内側〕構成の積層基材
（１１）をラミネート加工法で作製し（ａ）、この積層
基材の容器外側面に６０μｍ厚の低密度ポリエチレン層
（１２）を、容器内層面に６０μｍ厚の低密度ポリエチ
レン層（１３）を押出しラミネート加工法で形成して、
天部材（１１０）の積層材料（１０）を作製し（ｂ）、
この天部材（１１０）の積層材料（１０）の飲み口部位
置に開口部（１１１）を打抜き加工し（ｃ）、この開口
部（１１１）を形成した天部材（１１０）の積層材料
（１０）の容器外層面に、開口部（１１１）を覆うよう
に、開口部（１１１）より大きい４０μｍ厚の低密度ポ
リエチレンフィルム（２１）を熱融着し、容器内層面
に、開口部（１１１）を覆うように、開口部（１１１）
より大きい他の４０μｍ厚の低密度ポリエチレンフィル
ム（２２）を熱融着し、さらに、この二枚の低密度ポリ
エチレンフィルム（２１，２２）の開口部（１１１）内
の当接面を熱融着した（ｄ）。次に、この開口部（１１
１）内の二枚の低密度ポリエチレンフィルム（２１，２
２）を熱融着した部分を、打抜き加工して、熱融着部分
より小さい開口部（２３）を形成して、積層材料（１１
０）の開口部（１１１）の端面（１４）を低密度ポリエ
チレンフィルム（２１，２２）で保護した飲み口部を形
成した（ｅ）。次に、この飲み口部の容器外側の低密度
ポリエチレンフィルム上面に、〔上側〕ポリエチレン層
（４０μｍ厚）／二軸延伸ポリエチレンテレフタレート
フィルム層（１２μｍ厚）／ポリエチレン層（４０μｍ
厚）構成の積層材料からなり、開封用つまみ（１４１）
をもつ封止シート（１４０）を熱融着して飲み口部を封
止した（ｆ）。これとは別個に、〔容器外側〕ポリエチ
レン層（２０μｍ厚）／板紙層（２８０ g/m2 ）／ポリ
エチレン層（１５μｍ厚）／二軸延伸ポリエチレンテレ
フタレートフィルム層（１２μｍ厚）／酸化ケイ素蒸着
薄膜層（４００Å厚）／ポリエチレン層（６０μｍ厚）
〔容器内側〕構成の積層基材を用いた胴部材（１２０）
を作製し、さらに、〔容器外側〕ポリエチレン層（２０
μｍ厚）／板紙層（２４０ g/m2 ）／ポリエチレン層
（１５μｍ厚）／二軸延伸ポリエチレンテレフタレート
フィルム層（１２μｍ厚）／酸化ケイ素蒸着薄膜層（４
００Å厚）／ポリエチレン層（６０μｍ厚）〔容器内
側〕構成の積層基材を用いた底部材（１３０）を作製し
た。次に、図３（ａ）及び（ｂ）に示すように、上述の
胴部材（１２０）の下端に、底部材（１３０）を熱融着
し、オレンジジュースを充填し、胴部材（１２０）の上
端に、飲み口部を有する天部材（１１０）を熱融着して
容器を密封し、本実施例の液体用紙容器（１００）を作
製した。
【００１０】上述のオレンジジュースを充填した本実施
例の液体用紙容器を、１０ケース２００本倒立させた状
態で、通常の保管と流通過程を経たのち、飲み口部を熱
融着して覆った低密度ポリエチレンフィルムの、積層材
料の開口部の端面への内容物に対する保護状態を調べ
た。低密度ポリエチレンフィルムの熱融着部へのオレン
ジジュースの浸透は全くなく、積層材料の開口部の端面
は、全ての容器において、完全に内容物から保護されて
いた。
【００１１】
【発明の効果】本発明の液体用紙容器は、飲み口部の積
層材料の開口部の端面を、従来の積層材料の最内層と最
外層の防水性樹脂層を熱融着して覆うものとは異なり、
別個の防水性樹脂フィルムを用いて、積層材料の最内層
と最外層上に接着し、熱融着して覆うため、使用する防
水性樹脂フィルムの材質や厚みなどを容器の目的に合わ
せて設定でき、熱融着時に発生し易いピンホールや薄肉
部などを避けることができる。この結果、本発明の液体
用紙容器は、飲み口部における積層材料の開口部の端面
が、内容物に対して良好に保護されている。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid paper container having a spout sealed with a sealing sheet, and more particularly, to an opening of a laminated material at the spout. The present invention relates to a liquid paper container in which the end face of the section is well protected against the contents. 2. Description of the Related Art Recently, in the field of liquid foods such as fruit juice drinks, coffee, liquid soups, lactic acid drinks, etc., for example, FIG.
(A) and (b) as shown in the trunk member (120),
A liquid paper container (100) made of a laminated material obtained by heat-sealing a top member (110) having a drinking opening sealed with a sealing sheet (140) and a bottom member (130) is used in a wide range. ing. The laminated material used for this liquid paper container has heat-sealing properties and waterproof properties on the outermost layer and the innermost layer of a laminated base material composed of a synthetic resin layer, a paper layer, a metal foil layer, a metal-deposited thin film layer, and the like. It was provided with a synthetic resin layer. The structure of the spout is disclosed in Japanese Patent Publication No. 6-49496, for example, as shown in FIG.
The synthetic resin layer of the outermost layer (12) and the synthetic resin layer of the innermost layer (13) of the laminated material (10) cover the end surface (14) of the opening (111) of the laminated material at the drinking spout and are waterproof. It was adhered to the state. [0003] However, the synthetic resin layer of the outermost layer and the innermost layer of the above-mentioned laminated material covers the end face of the opening of the laminated material in the drinking spout and adheres in a waterproof state. In the conventional method, a pinhole or a thin portion may be generated at the time of heat fusion between the outermost synthetic resin layer and the innermost synthetic resin layer, depending on the state of the end surface of the opening of the laminated material. However, the protection against the contents was not good. The present invention solves the above-mentioned problems in the conventional method. The end face of the opening of the laminated material of the drinking spout is covered with a waterproof synthetic resin film in a good condition to remove the contents. Liquid paper container to protect. According to the present invention, as shown in FIG. 1, an outermost layer (1) of a laminated material (10) for forming a container is formed.
In a liquid paper container in which 2) and the innermost layer (13) are a waterproof synthetic resin layer and have a spout sealed with an opening sheet (140), a spout-portion laminated material (10)
Are formed by two annular waterproof synthetic resin films (21, 22) having an outer diameter larger than the opening (111) and an inner diameter smaller than the opening (111). The contact surface inside the opening (111) between the waterproof synthetic resin film (21) bonded to the outer surface of the container and the waterproof synthetic resin film (22) bonded to the inner surface of the container is bonded. The opening (11) of the laminated material (10)
1) The end face (14) of the waterproof synthetic resin film (21,
22) A liquid paper container covered by 22). As the material of the above-mentioned waterproof synthetic resin film and waterproof synthetic resin layer, polyethylene such as low-density polyethylene and linear low-density polyethylene, and, if necessary, polyester copolymer are used. In general, it is preferable that the adhesion of the waterproof synthetic resin film to the laminated material and the adhesion of the waterproof synthetic resin films are performed by a heat fusion method. The liquid paper container of the present invention covers the end face of the opening of the laminated material at the drinking mouth by heat sealing with the innermost layer and the outermost waterproof resin layer of the conventional laminated material. Unlike,
Since the innermost layer and the outermost layer of the laminated material are heat-sealed and covered using separate waterproof resin films, appropriate materials and film thickness can be set according to the purpose of the container. Pinholes, thin portions, and the like, which are likely to occur, can be avoided. First, as shown in FIG. 2, [outside of container] paperboard layer (220 g / m 2 ) / polyethylene layer (20 μm thickness) /
A laminated substrate (11) having a polyethylene layer (15 μm thickness) / biaxially stretched polyethylene terephthalate film layer (12 μm thickness) / silicon oxide vapor-deposited thin film layer (400 mm thick) [inside the container] was prepared by a laminating method (a). Forming a low-density polyethylene layer (12) having a thickness of 60 μm on the outer surface of the container of the laminated base material and a low-density polyethylene layer (13) having a thickness of 60 μm on the inner surface of the container by a laminating method;
A laminated material (10) for the top member (110) is produced (b),
An opening (111) is punched at the position of the spout of the laminated material (10) of the top member (110) (c), and the laminated material (10) of the top member (110) having the opening (111) formed therein. ), A low-density polyethylene film (21) having a thickness of 40 μm larger than the opening (111) is heat-sealed so as to cover the opening (111), and the opening (111) is formed on the inner layer of the container. Opening (111) so as to cover
Another larger 40 μm-thick low-density polyethylene film (22) is heat-sealed, and the contact surfaces in the openings (111) of the two low-density polyethylene films (21, 22) are heat-sealed. (D). Next, the opening (11)
1) Two low density polyethylene films (21, 2)
The heat-sealed portion of (2) is punched to form an opening (23) smaller than the heat-sealed portion, and the laminated material (11) is formed.
A drinking mouth was formed by protecting the end face (14) of the opening (111) of (0) with a low-density polyethylene film (21, 22) (e). Next, [upper] polyethylene layer (40 μm thickness) / biaxially stretched polyethylene terephthalate film layer (12 μm thickness) / polyethylene layer (40 μm)
Thickness) Composition of laminated material, opening knob (141)
The sealing sheet (140) having the above was thermally fused to seal the drinking mouth part (f). Separately from this, [outside the container] polyethylene layer (20 μm thickness) / paperboard layer (280 g / m 2 ) / polyethylene layer (15 μm thickness) / biaxially stretched polyethylene terephthalate film layer (12 μm thickness) / silicon oxide evaporated thin film Layer (400mm thick) / Polyethylene layer (60μm thick)
[Body inside] Body member using laminated base material (120)
And [the outside of the container] polyethylene layer (20
μm thickness) / paperboard layer (240 g / m 2 ) / polyethylene layer (15 μm thickness) / biaxially stretched polyethylene terephthalate film layer (12 μm thickness) / silicon oxide evaporated thin film layer (4
A bottom member (130) was prepared using a laminated base material having a structure of (thickness: 00 °) / polyethylene layer (thickness: 60 μm) [inside of container]. Next, as shown in FIGS. 3A and 3B, a bottom member (130) is heat-sealed to the lower end of the above-mentioned body member (120), filled with orange juice, and the body member (120) is filled. A top member (110) having a mouthpiece was thermally fused to the upper end of the container to seal the container, thereby producing a liquid paper container (100) of this example. [0010] The liquid paper container of this embodiment filled with the above-mentioned orange juice was subjected to a normal storage and distribution process in a state of 200 inverted cases, and then the drinking mouth was covered by heat sealing. The protection state of the low-density polyethylene film against the contents on the end face of the opening of the laminated material was examined. There was no penetration of the orange juice into the heat-sealed portion of the low-density polyethylene film, and the end face of the opening of the laminated material was completely protected from the contents in all containers. According to the liquid paper container of the present invention, the end face of the opening of the laminated material of the drinking spout is heat-sealed to the innermost layer and the outermost waterproof resin layer of the conventional laminated material. Unlike what you cover,
Use a separate waterproof resin film to adhere to the innermost layer and the outermost layer of the laminated material, heat seal and cover, so the material and thickness of the waterproof resin film used are set according to the purpose of the container It is possible to avoid pinholes, thin portions, and the like, which are likely to be generated during thermal fusion. As a result, in the liquid paper container of the present invention, the end face of the opening of the laminated material in the drinking spout is well protected from the contents.
【図面の簡単な説明】
【図１】本発明の一例の実施例の液体用紙容器の飲み口
部付近の断面図である。
【図２】実施例の液体用紙容器の天部材に、飲み口部を
形成する工程（ａ〜ｆ）を示す説明図である。
【図３】（ａ）は、飲み口部を有する液体用紙容器の一
例の斜視図であり、（ｂ）は、その構造を示す説明図で
ある。
【図４】従来の一例の液体用紙容器の飲み口部付近の断
面図である。
【符号の説明】
１０……積層材料
１１……積層基材
１２……最外層
１３……最内層
１４……端面
２１，２２……防水性樹脂フィルム
２３，１１１……開口部
１００……液体用紙容器
１１０……天部材
１２０……胴部材
１３０……底部材
１４０……封止シート
１４１……開封用つまみBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of the vicinity of a mouth of a liquid paper container according to an embodiment of the present invention. FIG. 2 is an explanatory view showing steps (a to f) of forming a drinking mouth portion on a top member of the liquid paper container of the embodiment. FIG. 3A is a perspective view of an example of a liquid paper container having a drinking opening, and FIG. 3B is an explanatory diagram showing the structure thereof. FIG. 4 is a cross-sectional view of the vicinity of a mouth of a conventional liquid paper container. [Description of Signs] 10 ... Laminated material 11 ... Laminated substrate 12 ... Outermost layer 13 ... Innermost layer 14 ... End faces 21,22 ... Waterproof resin film 23,111 ... Opening 100 ... Liquid Paper container 110 Top member 120 Body member 130 Bottom member 140 Sealing sheet 141 Opening knob
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B65D 5/74 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) B65D 5/74
Claims (1)
層が防水性合成樹脂層であり、且つ、封止シートで密封
した飲み口部を有する液体用紙容器において、飲み口部
の積層材料の開口部を、外径が開口部より大きく、内径
が開口部より小さい環状の二枚の防水性合成樹脂フィル
ムで、容器外面と容器内面とに接着し、且つ、容器外面
に接着した防水性合成樹脂フィルムと、容器内面に接着
した防水性合成樹脂フィルムとの開口部内側の当接面を
接着して、積層材料の開口部の端面を防水性合成樹脂フ
ィルムで覆ったことを特徴とする液体用紙容器。(57) [Claim 1] A liquid paper in which the outermost layer and the innermost layer of the laminated material forming the container are a waterproof synthetic resin layer, and have a drinking mouth sealed with a sealing sheet. In the container, the opening of the lamination material of the drinking spout, the outer diameter is larger than the opening, the inner diameter of the two waterproof synthetic resin film is smaller than the opening, bonded to the outer surface of the container and the inner surface of the container, In addition, the contact surface inside the opening between the waterproof synthetic resin film adhered to the outer surface of the container and the waterproof synthetic resin film adhered to the inner surface of the container is adhered, and the end surface of the opening of the laminated material is made of the waterproof synthetic resin. A liquid paper container covered with a film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22338694A JP3389696B2 (en) | 1994-09-19 | 1994-09-19 | Liquid paper container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22338694A JP3389696B2 (en) | 1994-09-19 | 1994-09-19 | Liquid paper container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0885542A JPH0885542A (en) | 1996-04-02 |
| JP3389696B2 true JP3389696B2 (en) | 2003-03-24 |
Family
ID=16797340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22338694A Expired - Fee Related JP3389696B2 (en) | 1994-09-19 | 1994-09-19 | Liquid paper container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3389696B2 (en) |
-
1994
- 1994-09-19 JP JP22338694A patent/JP3389696B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0885542A (en) | 1996-04-02 |
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