JP2006224467A

JP2006224467A - Manufacturing method of upper member used by being integrally molded with shoulder part and mouth neck part of tube container and tube container using upper member manufactured thereby

Info

Publication number: JP2006224467A
Application number: JP2005041295A
Authority: JP
Inventors: Seiichiro Komoda; 誠一郎菰田; Hiroko Takamori; 寛子高森
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2005-02-17
Filing date: 2005-02-17
Publication date: 2006-08-31
Anticipated expiration: 2025-02-17
Also published as: JP4662444B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method excellent in productivity and economical efficiency of an upper member used by being integrally molded in order to enhance the gas barrier properties of the shoulder part and mouth neck part of a tube container, and the tube container excellent in gas barrier properties using the upper member manufactured by this manufacturing method. <P>SOLUTION: A composite sheet 10 constituted by overlaying polyolefinic resin films on both sides of an aluminum foil is used in the molding of the upper member. The molding of the upper member is divided into five stages as shown by processes (2)-(6) and the composite sheet 10 is successively press-molded at the normal temperature using male and female molds to manufacture the upper member 70. Further the tube container is manufactured by inserting the upper member in the inner surfaces of the shoulder part and the mouth neck part 5 continuous to it to be integrally molded on one end of a cylindrical body part having gas barrier properties using an outside molding resin by compression molding or injection molding. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、チューブ容器の肩部および口頸部に一体化成形して用いる上部部材の製造方法、およびその製造方法で製造された上部部材を用いたチューブ容器に関し、特に、チューブ容器の胴部をガスバリヤー性に優れた積層体で形成すると共に、胴部の一端に一体化成形して設ける肩部および口頸部に関しても、その内側の面に、肩部および口頸部の内面形状に合わせて予め成形された高ガスバリヤー性の上部部材を配置して一体化成形することにより、容器全体のガスバリヤー性を向上させたチューブ容器に関する。 TECHNICAL FIELD The present invention relates to a method for manufacturing an upper member that is integrally formed on a shoulder portion and a mouth-and-neck portion of a tube container, and a tube container using the upper member manufactured by the manufacturing method. In addition, the shoulder and mouth / neck part formed by integrally molding at one end of the body part are formed on the inner surface of the shoulder part and the mouth / neck part. In addition, the present invention relates to a tube container in which the gas barrier property of the entire container is improved by arranging and integrally molding a high gas barrier upper member that is molded in advance.

従来、チューブ容器は、練り歯磨きのほか、練りわさび、練りからし、コンデンスミルクなどの食品、化粧品、医薬品などの内容物を充填包装し、使用時に必要とする量を任意に押し出して使用することができ、使い勝手のよい容器として、その用途および使用量が拡大されてきた。
このようなチューブ容器は、用途の拡大に伴って充填される内容物も多様化し、内容物の保存性を向上させるため、チューブ容器のガスバリヤー性を高めることが求められるようになり、例えば、ラミネートチューブ容器などで、胴部をアルミニウム箔などのガスバリヤー性材料を積層した積層シートで形成すると共に、胴部の一端に一体化成形して形成する肩部および口頸部のうち、肩部の内面にロンデル部材と呼ばれるアルミニウム箔の両面にポリエチレンなどの熱接着性樹脂を積層した複合シートを円形に打ち抜き、且つその中心部に口頸部に相当する穴を設けたドーナッツ形の部材を笠状に成形して挿入し、一体化成形して作製したチューブ容器が使用されていた（例えば、特許文献１参照）。 Conventionally, tube containers are used for toothpaste, kneaded wasabi, kneaded, filled with foods such as condensed milk, cosmetics, pharmaceuticals, etc. As an easy-to-use container, its use and use amount have been expanded.
Such a tube container is diversified in the contents to be filled with the expansion of applications, and in order to improve the storage stability of the contents, it is required to improve the gas barrier property of the tube container, for example, In a laminated tube container, etc., the body part is formed of a laminated sheet obtained by laminating a gas barrier material such as aluminum foil, and the shoulder part of the shoulder part and the mouth and neck part formed by integrally molding at one end of the body part A doughnut-shaped member with a hole corresponding to the mouth and neck at the center is punched out in a circular shape on the inner surface of the aluminum sheet called a Rondel member and laminated with heat adhesive resin such as polyethylene on both sides of the aluminum foil. A tube container produced by forming and inserting into a shape and integrally forming has been used (for example, see Patent Document 1).

前記のようにチューブ容器を構成することにより、肩部および口頸部のうち、面積の大きい肩部のガスバリヤー性が向上されるので、チューブ容器全体としては、大幅にガスバリヤー性が向上された。
しかし、前記のようなチューブ容器でも、口頸部に関しては、成形樹脂の厚みが厚いものの、特にガスバリヤー性の向上対策が採られておらず、且つチューブ容器に充填される内容物は、ペースト状物など流動性の低いもの多いため、酸素などの影響を受けやすい内容物の場合は、保存中に口頸部に充填されている内容物が変色、或いは変質し、使用の開始時にこれが押し出されるため、更に、口頸部に対しても、ガスバリヤー性を向上させることが要望されるようになった。 By configuring the tube container as described above, the gas barrier property of the shoulder portion having a large area out of the shoulder portion and the mouth / neck portion is improved, so that the gas barrier property is greatly improved as a whole tube container. It was.
However, even in the tube container as described above, although the thickness of the molded resin is thick with respect to the mouth and neck, no measures for improving the gas barrier property are taken, and the content filled in the tube container is a paste. In the case of contents that are easily affected by oxygen, etc., the contents filled in the mouth and neck during storage are discolored or altered, and this is pushed out at the start of use. Therefore, it has been demanded to improve the gas barrier property for the mouth and neck.

このような要望に応えるために、前記ロンデル部材のようなガスバリヤー性向上用部材をチューブ容器の肩部だけではなく、肩部からそれに連続する口頸部にまで延長した形状に成形して、その成形部材を、チューブ容器の胴部の一端に肩部および口頸部を一体化成形する際、その内面または中間層などに挿入して、肩部およびそれに連続する口頸部の樹脂と一体化成形したチューブ容器が提案されている（例えば、特許文献２、および特許文献３参照）。
特開平４−１４７８３７号公報（第１〜３頁、第２図）特開平９−１３２２５２号公報（第２〜３頁、図２、図３）特許第３３０１０２７号公報（第１〜３頁、図１、図２） In order to meet such a demand, the gas barrier property improving member such as the Rondel member is molded not only in the shoulder portion of the tube container, but also in a shape extending from the shoulder portion to the mouth and neck portion continuous thereto, When the shoulder and mouth / neck part are integrally molded at one end of the body of the tube container, the molded member is inserted into the inner surface or intermediate layer, etc., and integrated with the shoulder part and the continuous resin at the mouth / neck part. Chemically molded tube containers have been proposed (see, for example, Patent Document 2 and Patent Document 3).
Japanese Patent Laid-Open No. 4-147837 (pages 1 to 3, FIG. 2) Japanese Patent Laid-Open No. 9-132252 (pages 2 and 3, FIGS. 2 and 3) Japanese Patent No. 3301027 (pages 1 to 3, FIGS. 1 and 2)

上記特許文献２、および３に記載された発明によれば、チューブ容器の肩部とそれに連続する口頸部の両方にガスバリヤー性を付与できるので、チューブ容器に一層高いガスバリヤー性を付与することができる。
しかし、このようなチューブ容器でも、特許文献２に記載された発明のチューブ容器では、肩部および口頸部にガスバリヤー性を付与するインサート部材を胴部の一端に一体化成形する際、最初に肩部および口頸部の内側成形部を熱融着性樹脂で一体化成形して設けた後、その外面にインサート部材を被せて装着し、次いで、その外面に外側成形部を熱融着性樹脂で一体化成形して形成しているため、２段階の成形が必要となり、製品の完成度は高められるものの、設備費の増大に加えて生産性の低下があり、製造コストが高くなる問題があった。 According to the inventions described in Patent Documents 2 and 3 above, gas barrier properties can be imparted to both the shoulder portion of the tube container and the mouth-and-neck portion continuous thereto, so that a higher gas barrier property is imparted to the tube container. be able to.
However, even in such a tube container, in the tube container of the invention described in Patent Document 2, when an insert member that imparts gas barrier properties to the shoulder portion and the mouth and neck portion is integrally formed at one end of the trunk portion, The inner molding part of the shoulder part and the mouth and neck part is integrally molded with a heat-fusible resin, and then the outer part is covered with an insert member, and then the outer molding part is heat-sealed to the outer surface. Since it is formed by integral molding with a functional resin, two-stage molding is required, and although the completeness of the product is increased, there is a decrease in productivity in addition to an increase in equipment costs, resulting in an increase in manufacturing cost There was a problem.

また、特許文献３に記載された発明のチューブ容器では、その頭部、即ち、肩部およびそれに連続する口頸部を、胴部の上端部に一体化成形して形成する際、その内面側にインサートして用いるアルミ芯材の成形加工を、数次の段階に分け、それぞれのプレス金型をアルミ薄板の両面にラミネートされた被覆樹脂膜の樹脂材料の軟化点と略等しい温度に加熱してプレス成形しているので、金型の熱寸法安定性、耐熱性、耐久性などの性能のほか、金型の加熱装置およびその温度調節装置なども必要となり、これらの設備費およびランニングコストの上昇があり、チューブ容器の製造コストが高くなる問題があった。 Further, in the tube container of the invention described in Patent Document 3, when the head portion, that is, the shoulder portion and the mouth and neck portion continuous therewith are formed integrally with the upper end portion of the trunk portion, the inner surface side thereof is formed. The molding process of the aluminum core material used as an insert is divided into several stages, and each press mold is heated to a temperature approximately equal to the softening point of the resin material of the coated resin film laminated on both sides of the aluminum sheet. Therefore, in addition to the thermal dimensional stability, heat resistance, and durability of the mold, a mold heating device and its temperature control device are also required. There was a problem that the manufacturing cost of the tube container was increased due to the increase.

本発明は、前述のような問題点を解決するためになされたものであり、その課題は、筒状の胴部の一端に肩部およびそれに連続する口頸部を一体化成形して形成する際に、その内面に挿入して一体的に溶着させて積層するガスバリヤー性に優れた上部部材を生産性よく且つ低コストで製造する製造方法と、その製造方法を用いて製造された前記上部部材を、ガスバリヤー性に優れた積層体で形成された胴部の一端に、一体化成形して設ける肩部およびそれに連続する口頸部の内面に挿入し、一体的に溶着させて積層することにより、容器全体のガスバリヤー性が向上されたチューブ容器を生産性よく且つ低コストで提供することである。 The present invention has been made to solve the above-mentioned problems, and the problem is that the shoulder and the mouth and neck continuous therewith are integrally formed at one end of the cylindrical body. In this case, a manufacturing method for manufacturing an upper member excellent in gas barrier property, which is inserted into the inner surface and integrally welded and laminated, with high productivity and at low cost, and the upper part manufactured using the manufacturing method A member is inserted into one end of a body portion formed of a laminate having excellent gas barrier properties into a shoulder portion formed by integral molding and an inner surface of a mouth and neck portion continuous thereto, and integrally welded and laminated. Thus, a tube container having an improved gas barrier property of the entire container is provided with high productivity and low cost.

上記の課題は、以下の本発明により解決することができる。
即ち、請求項１に記載した発明は、チューブ容器の肩部とそれに連続する口頸部の内面に一体化成形して用いられるチューブ容器の上部部材の製造方法であって、少なくとも下記（１）〜（７）に記載された工程を含むことを特徴とするチューブ容器の上部部材の製造方法からなる。
（１）アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを所定の寸法の円形に打ち抜いて、円形の複合シートを作製する工程。
（２）前記円形の複合シートを、第１の雌雄の成形型を用いて常温でプレス成形により、外縁部を笠状に成形すると同時に中心部を有頂筒状に成形し、笠状部の中心に有頂筒部を有する第１の成形体を得る工程。
（３）前記第１の成形体を、第２の雌雄の成形型を用いて常温でプレス成形により、筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第２の成形体を得る工程。
（４）前記第２の成形体を、第３の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第３の成形体を得る工程。
（５）前記第３の成形体を、第４の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくして所定の径に成形すると同時に、筒部の長さを増大させて所定の長さに成形し、且つ笠状部の面積を更に増大させるように成形し、第４の成形体を得る工程。
（６）前記第４の成形体を、第５の雌雄の成形型を用いて常温でプレス成形により、筒部の上端の角部および笠状部の周縁の形状を最終設定形状に成形し、第５の成形体を得る工程。
（７）前記第５の成形体を、所定の外周寸法になるように外周をトリミングして、最終形態の上部部材を得る工程。 The above problems can be solved by the following present invention.
That is, the invention described in claim 1 is a method for manufacturing an upper member of a tube container that is used by being integrally molded on the shoulder of the tube container and the inner surface of the mouth-and-neck part that is continuous with the shoulder, and at least the following (1) It consists of the manufacturing method of the upper member of a tube container characterized by including the process described in-(7).
(1) A step of producing a circular composite sheet by punching a composite sheet in which a polyolefin resin film is bonded to both surfaces of an aluminum foil into a circular shape having a predetermined size.
(2) The circular composite sheet is formed by pressing at a normal temperature using a first male and female mold, and the outer edge portion is formed into a cap shape, and at the same time, the center portion is formed into a top tube shape. The process of obtaining the 1st molded object which has a top cylinder part in the center.
(3) The first molded body is molded by press molding at room temperature using a second male and female mold so as to increase the area of the cap portion while reducing the diameter of the cylindrical portion, The process of obtaining the molded object.
(4) The second molded body is molded by press molding at room temperature using a third male and female mold so as to increase the area of the cap-shaped portion while further reducing the diameter of the cylindrical portion, A step of obtaining the molded product of 3.
(5) The third molded body is formed into a predetermined diameter by further reducing the diameter of the cylindrical portion by press molding at room temperature using a fourth male and female molding die, and at the same time, the length of the cylindrical portion is reduced. A step of obtaining a fourth molded body by increasing the size to a predetermined length and further increasing the area of the cap-shaped portion.
(6) The fourth molded body is molded into a final set shape by press molding at room temperature using a fifth male and female molding die, and the corners of the upper end of the cylindrical portion and the periphery of the cap-shaped portion, A step of obtaining a fifth molded body.
(7) A step of trimming an outer periphery of the fifth molded body so as to have a predetermined outer peripheral size to obtain an upper member in a final form.

本発明において、上部部材の中心部の筒部は、有頂筒状、即ち、頂部（天面）を有する筒状に形成し、その上部部材をチューブ容器の肩部およびそれに連続する口頸部の内面に挿入して一体化成形してチューブ容器を製造するものであり、このチューブ容器に充填された内容物を取り出す際に、例えば、キャップなどに設けた突き刺し用の突起部で前記頂部を突き破って内容物を押し出すようにしたものであるが、必要に応じて頂部を予め円形、または星形、長方形などに打ち抜いておくこともできる。
また、上部部材のプレス成形は、常温、即ち、冷間プレス方式で前記工程（２）〜（６）までの５段階で徐々に行っているので、特に問題なく成形できるが、複合シートのアルミニウム箔の両面にラミネートされたポリオレフィン系樹脂フィルムは、成形による歪みを有しているので、特に成形後の上部部材を長期保管するような場合には、上部部材の成形後に、使用した樹脂の融点以下の温度で加熱処理を行って熱固定することができる。 In the present invention, the cylindrical portion at the center of the upper member is formed into a cylindrical shape with a top, that is, a cylinder having a top (top surface), and the upper member is formed in the shoulder portion of the tube container and the mouth-and-neck portion continuous therewith. When the contents filled in the tube container are taken out, for example, the top portion is formed by a piercing projection provided on a cap or the like. The contents are pushed through to extrude the contents, but if necessary, the top portion can be punched into a circle, a star, a rectangle or the like in advance.
Further, the press molding of the upper member is gradually performed at normal temperature, that is, in the cold press method in five steps from the steps (2) to (6). Since the polyolefin resin film laminated on both sides of the foil has distortion due to molding, especially when storing the molded upper member for a long period of time, the melting point of the resin used after molding the upper member Heat fixing can be performed by performing heat treatment at the following temperature.

請求項２に記載した発明は、筒状の胴部の一端に、肩部とそれに連続する口頸部が一体化成形されてなるチューブ容器において、胴部がガスバリヤー性を有する多層積層体で形成され、肩部とそれに連続する口頸部が、その内側の面に配置されたアルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせてなる複合シートを予め肩部とそれに連続する口頸部の内面形状に合わせて成形された上部部材と、その外側を覆って一体化成形された外側成形樹脂とで形成されると共に、該上部部材が、少なくとも下記（１）〜（７）に記載された工程を含む製造方法で製造されたものであることを特徴とするチューブ容器からなる。
（１）アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを所定の寸法の円形に打ち抜いて、円形の複合シートを作製する工程。
（２）前記円形の複合シートを、第１の雌雄の成形型を用いて常温でプレス成形により、外縁部を笠状に成形すると同時に中心部を有頂筒状に成形し、笠状部の中心に有頂筒部を有する第１の成形体を得る工程。
（３）前記第１の成形体を、第２の雌雄の成形型を用いて常温でプレス成形により、筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第２の成形体を得る工程。
（４）前記第２の成形体を、第３の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第３の成形体を得る工程。
（５）前記第３の成形体を、第４の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくして所定の径に成形すると同時に、筒部の長さを増大させて所定の長さに成形し、且つ笠状部の面積を更に増大させるように成形し、第４の成形体を得る工程。
（６）前記第４の成形体を、第５の雌雄の成形型を用いて常温でプレス成形により、筒部の上端の角部および笠状部の周縁の形状を最終設定形状に成形し、第５の成形体を得る工程。
（７）前記第５の成形体を、所定の外周寸法になるように外周をトリミングして、最終形態の上部部材を得る工程。 The invention described in claim 2 is a multi-layer laminate in which a body portion has a gas barrier property in a tube container in which a shoulder portion and a mouth and neck portion continuous therewith are integrally formed at one end of a cylindrical body portion. The shoulder portion and the mouth and neck portion that is continuous with the shoulder portion and the mouth and neck portion that is continuous with the composite sheet formed by laminating a polyolefin resin film on both sides of the aluminum foil disposed on the inner surface The upper member is formed of an upper member molded in accordance with the inner surface shape and an outer molded resin integrally molded so as to cover the outer side, and the upper member is described in at least the following (1) to (7) It consists of the tube container characterized by being manufactured with the manufacturing method containing a process.
(1) A step of producing a circular composite sheet by punching a composite sheet in which a polyolefin resin film is bonded to both surfaces of an aluminum foil into a circular shape having a predetermined size.
(2) The circular composite sheet is formed by pressing at a normal temperature using a first male and female mold, and the outer edge portion is formed into a cap shape, and at the same time, the center portion is formed into a top tube shape. The process of obtaining the 1st molded object which has a top cylinder part in the center.
(3) The first molded body is molded by press molding at room temperature using a second male and female mold so as to increase the area of the cap portion while reducing the diameter of the cylindrical portion, The process of obtaining the molded object.
(4) The second molded body is molded by press molding at room temperature using a third male and female mold so as to increase the area of the cap-shaped portion while further reducing the diameter of the cylindrical portion, A step of obtaining the molded product of 3.
(5) The third molded body is formed into a predetermined diameter by further reducing the diameter of the cylindrical portion by press molding at room temperature using a fourth male and female molding die, and at the same time, the length of the cylindrical portion is reduced. A step of obtaining a fourth molded body by increasing the size to a predetermined length and further increasing the area of the cap-shaped portion.
(6) The fourth molded body is molded into a final set shape by press molding at room temperature using a fifth male and female molding die, and the corners of the upper end of the cylindrical portion and the periphery of the cap-shaped portion, A step of obtaining a fifth molded body.
(7) A step of trimming an outer periphery of the fifth molded body so as to have a predetermined outer peripheral size to obtain an upper member in a final form.

前記胴部は、少なくとも中間層にアルミニウム箔などのガスバリヤー層が積層され、両側の最外層にポリオレフィン系樹脂フィルムがラミネートされた矩形状の積層シートを筒状に熱接着して作製してもよく、また、少なくとも中間層にエチレン・ビニルアルコール共重合体（ＥＶＯＨ）などのガスバリヤー性樹脂を用い、両側の最外層にポリオレフィン系樹脂を用いて、多層共押し出しチューブ成形法で作製された筒状体を用いてもよい。
また、前記胴部の一端に、前記上部部材を用いて肩部とそれに連続する口頸部を一体化成形する方法は、コンプレッション成形法によるのが金型の作製も容易で簡便であるが、射出成形法を用いて一体化成形することもできる。 The barrel portion may be produced by thermally bonding a rectangular laminated sheet in which a gas barrier layer such as an aluminum foil is laminated on at least an intermediate layer and a polyolefin resin film is laminated on outermost layers on both sides in a cylindrical shape. Well, a tube made by a multilayer coextrusion tube forming method using a gas barrier resin such as ethylene / vinyl alcohol copolymer (EVOH) for at least the intermediate layer and a polyolefin resin for the outermost layers on both sides. A shaped body may be used.
In addition, the method of integrally molding the shoulder and the neck and neck continuous with the shoulder using the upper member at one end of the body portion is easy and simple to produce a mold by the compression molding method. It can also be integrally formed using an injection molding method.

請求項３に記載した発明は、前記上部部材に用いる複合シートのアルミニウム箔の厚みが４０〜９０μｍであることを特徴とする請求項２に記載のチューブ容器からなる。 The invention described in claim 3 is the tube container according to claim 2, wherein the thickness of the aluminum foil of the composite sheet used for the upper member is 40 to 90 μm.

前記複合シートのアルミニウム箔の厚みは、ガスバリヤー性、成形性、突き刺しによる開封性などの点から、４０〜９０μｍの範囲であることが好ましい。アルミニウム箔の厚みが４０μｍ未満の場合は成形後の上部部材が変形しやすくなるため好ましくない。また、アルミニウム箔の厚みが９０μｍを超える場合は、絶対的に不可という訳ではないが既に充分な厚みであり、その必要性がなく、むしろチューブ容器に一体化成形された上部部材の頂部を突き破って内容物を押し出す際、その開封が硬くなること、およびコスト面でも高くなるため好ましくない。 The thickness of the aluminum foil of the composite sheet is preferably in the range of 40 to 90 μm from the viewpoints of gas barrier properties, moldability, puncture opening properties, and the like. When the thickness of the aluminum foil is less than 40 μm, it is not preferable because the formed upper member is easily deformed. Also, if the thickness of the aluminum foil exceeds 90 μm, it is not absolutely impossible, but it is already sufficient, and there is no necessity, but rather it breaks through the top of the upper member integrally formed in the tube container. When the contents are pushed out, the unsealing is not preferable because the opening becomes hard and the cost increases.

請求項１に記載した発明によれば、チューブ容器の胴部の一端に肩部とそれに連続する口頸部を一体化成形して形成する際に、その内面に挿入して一体化成形する上部部材を前記のような工程で製造しているので、以下に列挙するような効果が得られる。
（ａ）上部部材のプレス成形に用いる複合シートを、アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを用いているので、その貼り合わせをドライラミネーション法で行うことができ、使用する接着剤の選定により、成形適性を損なうことなくラミネート強度に優れた複合シートを得ることができる。
また、複合シートの中間層にアルミニウム箔を用いているのでガスバリヤー性に優れた上部部材を得ることができる。
（ｂ）上部部材のプレス成形が、前記工程（２）〜（６）までの５段階で徐々に行われると同時に、常温で行われるので、全体が比較的均一な厚みで成形され、部分的な歪みの差も少なく安定した状態に成形することができる。
また、成形が常温で行われるため、成形金型の加熱装置、温度調節装置なども不要であり、金型の耐熱安定性、耐久性などを考慮する必要もないので、成形金型など成形装置を低コストで作製することができる。
（ｃ）成形後の上部部材の形状は、前述したように、口頸部を有頂筒状に成形することを基本としているので、チューブ容器に一体化成形した後、口部をアルミシール材などで封止する必要もなく、優れたガスバリヤー性を付与することができる。 According to the first aspect of the present invention, when the shoulder portion and the continuous neck portion are formed integrally with one end of the body portion of the tube container, the upper portion is inserted into the inner surface and integrally formed. Since the member is manufactured by the process as described above, the following effects can be obtained.
(A) Since the composite sheet used for press molding of the upper member is a composite sheet in which a polyolefin resin film is bonded to both sides of an aluminum foil, the bonding can be performed by a dry lamination method and used. By selecting an adhesive, a composite sheet having excellent laminate strength can be obtained without impairing moldability.
Further, since an aluminum foil is used for the intermediate layer of the composite sheet, an upper member having excellent gas barrier properties can be obtained.
(B) Press molding of the upper member is performed at room temperature at the same time as the above steps (2) to (6) are gradually performed, so that the whole is molded with a relatively uniform thickness and partially. It can be molded in a stable state with little difference in distortion.
Also, since molding is performed at room temperature, there is no need for a molding die heating device, temperature control device, etc., and there is no need to consider the heat resistance stability, durability, etc. of the molding die. Can be manufactured at low cost.
(C) Since the shape of the upper member after molding is based on the shape of the mouth-and-neck portion formed into a crested tube shape as described above, the mouth portion is formed with an aluminum sealing material after being integrally molded with the tube container. It is not necessary to seal with, for example, and excellent gas barrier properties can be imparted.

請求項２に記載した発明によれば、チューブ容器を前記のように構成しているので、以下に記載するような作用効果を得ることができる。
即ち、チューブ容器の胴部をガスバリヤー性を有する多層積層体で形成すると共に、肩部とそれに連続する口頸部も、その内側の面に、アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせてなる複合シートを、請求項１に記載した製造方法で予め肩部とそれに連続する口頸部の内面形状に合わせて成形した上部部材を挿入し、その外側に、外側成形樹脂を用いて一体化成形して形成しているので、チューブ容器全体のガスバリヤー性を向上できると同時に、製造コストの上昇も抑制することができ、ガスバリヤー性に優れると共に、経済性にも優れたチューブ容器を提供することができる。
また、前記胴部の多層積層体の両面、および上部部材の複合シートの両面、そして、肩部とそれに連続する口頸部の外側成形樹脂のそれぞれに、同系統のポリオレフィン系樹脂を用いることにより、上部部材とその外側成形樹脂との間はもとより、胴部と肩部およびそれに連続する口頸部との間も一体化成形により強固に熱溶着させることができる。 According to the invention described in claim 2, since the tube container is configured as described above, the following effects can be obtained.
That is, the body of the tube container is formed of a multilayer laminate having gas barrier properties, and the polyolefin resin film is bonded to both sides of the aluminum foil on the inner side of the shoulder and the neck and neck that are continuous with the shoulder. The upper member formed by molding the composite sheet according to the shape of the shoulder and the inner surface of the mouth and neck that is continuous with the shoulder portion by the manufacturing method according to claim 1 is inserted, and an outer molding resin is integrally formed on the outside thereof. Since it is formed by chemical molding, it is possible to improve the gas barrier property of the entire tube container, and at the same time, it is possible to suppress an increase in manufacturing cost, and it is possible to provide a tube container excellent in gas barrier property and economical efficiency. Can be provided.
In addition, by using the same series of polyolefin-based resins for both sides of the multilayer laminate of the body portion, both sides of the composite sheet of the upper member, and the outer molding resin of the shoulder portion and the mouth and neck portion continuous thereto, Further, not only between the upper member and the outer molding resin thereof, but also between the body portion and the shoulder portion and the mouth and neck portion continuing thereto can be firmly heat-welded by integral molding.

請求項３に記載した発明によれば、請求項２に記載した発明のチューブ容器の構成において、前記上部部材に用いる複合シートのアルミニウム箔の厚みを４０〜９０μｍの範囲とした構成としているので、請求項２に記載した発明の作用効果に加えて、成形後の上部部材の形状を安定させることができると共に、優れたガスバリヤー性を有し、口部の突き破りによる開封も容易に行えるチューブ容器を提供することができる。 According to the invention described in claim 3, in the configuration of the tube container of the invention described in claim 2, since the thickness of the aluminum foil of the composite sheet used for the upper member is in the range of 40 to 90 μm, In addition to the operational effects of the invention described in claim 2, the tube container can stabilize the shape of the upper member after molding, has excellent gas barrier properties, and can be easily opened by breaking through the mouth. Can be provided.

以下に、本発明のチューブ容器の肩部とそれに連続する口頸部に一体化成形して用いる上部部材の製造方法、およびその製造方法で製造された上部部材を用いたチューブ容器の実施の形態について図面を用いて説明する。
図１は、本発明のチューブ容器の肩部とそれに連続する口頸部に一体化成形して用いる上部部材の製造方法の工程を説明する図であり、工程別の上部部材の形状を正面図で示したものである。但し、工程（７）の第５の成形体の外周をトリミングする工程は省略して示した。
図２は、本発明のチューブ容器の一実施例の構成を示す要部の断面図である。
尚、本発明は、その要旨を超えない限り、これらの図面に限定されるものではない。 Hereinafter, an embodiment of a tube container using the upper member manufactured by the manufacturing method of the upper member manufactured by the method of manufacturing the upper member manufactured by integrally molding the shoulder portion of the tube container of the present invention and the mouth-and-neck portion continuous thereto will be described. Will be described with reference to the drawings.
FIG. 1 is a diagram for explaining a process of a method of manufacturing an upper member used by integrally forming the shoulder portion of the tube container of the present invention and the mouth-and-neck portion continuous thereto, and shows the shape of the upper member according to the process as a front view. It is shown by. However, the step of trimming the outer periphery of the fifth molded body in the step (7) is omitted.
FIG. 2 is a cross-sectional view of the main part showing the configuration of an embodiment of the tube container of the present invention.
In addition, this invention is not limited to these drawings, unless the summary is exceeded.

図１に示した上部部材の製造方法は、工程（１）で、アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた長尺の複合シートから、打ち抜きにより、所定の寸法の円形で偏平な複合シート１０を作製し、次いで、工程（２）で、前記円形の複合シート１０を、第１の雌雄の成形型を用いて常温でプレス成形により、外縁部を傾斜を付けた笠状に成形すると同時に、中心部を筒部２と頂部３からなる有頂筒状に成形し、笠状部１の中心に有頂筒部を有する第１の成形体１１を作製する。この工程で作製された成形体１１は、工程（６）に示した第５の成形体１５と比較して、特に筒部２の径が大幅に大きく、高さも低いものである。
工程（３）では、前記第１の成形体１１を、第２の雌雄の成形型を用いて常温でプレス成形により、筒部２の径を小さくしながら笠状部１の面積を増大させるように成形し、第２の成形体１２を作製し、工程（４）では、前記第２の成形体１２を、第３の雌雄の成形型を用いて常温でプレス成形により、更に筒部２の径を小さくしながら笠状部１の面積を増大させるように成形して第３の成形体１３を作製し、次いで、工程（５）では、最終形状の上部部材に近づけるため、前記第３の成形体１３を、第４の雌雄の成形型を用いて常温でプレス成形により、更に筒部２の径を小さくして所定の径に成形すると同時に、筒部２の長さを増大させて所定の長さに成形し、且つ笠状部１の面積を更に増大させるように成形して第４の成形体１４を作製する。
そして、工程（６）では、前記第４の成形体１４を、第５の雌雄の成形型を用いて常温でプレス成形により、図示したように、筒部２の上端の角部に傾斜を付けると共に、笠状部１の周縁部の形状を、一端傾斜を大きくした後、その下端に略水平な部分を有する最終設定形状に成形し、第５の成形体１５を作製するものである。
尚、更に、工程（７）として、前記第５の成形体１５を、所定の外周寸法になるように外周をトリミングして最終形態の上部部材とする工程が含まれるが、その形状が前記第５の成形体１５と近似するため、図示することを省略した。 The manufacturing method of the upper member shown in FIG. 1 is a round and flat composite of a predetermined size by punching from a long composite sheet in which a polyolefin resin film is bonded to both surfaces of an aluminum foil in step (1). The sheet 10 is manufactured, and then, in the step (2), the circular composite sheet 10 is formed into a shade shape with an outer edge portion inclined by press molding at room temperature using a first male and female mold. At the same time, the center part is formed into a top cylinder shape including the cylinder part 2 and the top part 3, and the first molded body 11 having the top cylinder part at the center of the cap-shaped part 1 is produced. Compared with the fifth molded body 15 shown in the step (6), the molded body 11 produced in this process has a particularly large diameter and a low height of the cylindrical portion 2.
In the step (3), the area of the cap-shaped portion 1 is increased while the diameter of the cylindrical portion 2 is reduced by press-forming the first molded body 11 at room temperature using a second male and female mold. In the step (4), the second molded body 12 is press-molded at room temperature using a third male and female mold, and the cylindrical portion 2 is further molded. The third molded body 13 is produced by molding so as to increase the area of the cap-shaped portion 1 while reducing the diameter, and then in the step (5), the third shaped body 13 is brought close to the final shape upper member. The molded body 13 is molded by press molding at a normal temperature using a fourth male and female mold, and the diameter of the cylindrical portion 2 is further reduced to a predetermined diameter, and at the same time, the length of the cylindrical portion 2 is increased to be predetermined. The fourth molded body 14 is formed by molding so as to further increase the area of the cap-shaped portion 1. To.
Then, in the step (6), the fourth molded body 14 is subjected to press molding at room temperature using a fifth male and female mold as shown in FIG. At the same time, the shape of the peripheral edge portion of the cap-shaped portion 1 is increased to one end, and then formed into a final set shape having a substantially horizontal portion at the lower end thereof, thereby producing a fifth molded body 15.
Further, the step (7) includes a step of trimming the outer periphery of the fifth molded body 15 so as to have a predetermined outer peripheral size to form an upper member in the final form. In order to approximate to the molded body 15 of 5, the illustration is omitted.

次に、図２は、本発明のチューブ容器の一実施例の構成を示す要部の断面図であり、胴部の下部を省略して示した図である。
図２に示したチューブ容器１００は、筒状の胴部５０をガスバリヤー性を有する多層積層体で形成し、胴部５０の上部の開口部に、肩部とそれに連続する口頸部６０を一体化成形する際に、その内側の面に、前記工程（１）〜（７）に記載した製造方法で製造された上部部材７０を挿入し、図示したように、その頂部の中心部を除く外側の面と周囲の端部を覆うように外側成形樹脂８０をコンプレッション成形法または射出成形法で形成し、一体化成形して構成したものである。 Next, FIG. 2 is a cross-sectional view of the main part showing the configuration of an embodiment of the tube container of the present invention, and is a view in which the lower part of the body part is omitted.
The tube container 100 shown in FIG. 2 has a cylindrical body portion 50 formed of a multilayer laminate having gas barrier properties, and a shoulder portion and a mouth-and-neck portion 60 continuous with the shoulder portion are formed in the upper opening portion of the body portion 50. When integrally molding, the upper member 70 manufactured by the manufacturing method described in the steps (1) to (7) is inserted into the inner surface, and the center of the top is removed as shown in the figure. The outer molding resin 80 is formed by a compression molding method or an injection molding method so as to cover the outer surface and the peripheral end portions, and is integrally molded.

前記胴部５０に用いるガスバリヤー性を有する多層積層体としては、胴部５０をガスバリヤー性を有する多層積層シートを筒状に熱接着して作製する場合は、その多層積層シートとして簡単な構成では、例えば中間層に絵柄等の印刷層とガスバリヤー層とを積層し、その両面にポリオレフィン系樹脂層を積層した積層シートを使用することができる。
只、絵柄等の印刷層を設ける位置は、外側から見える位置であれば特に限定はされず、多層積層シートを筒状に熱接着した時、外側のポリオレフィン系樹脂層の表面、即ち、最外層となる位置に設けることもできる。また、中間層に設ける場合でも、ガスバリヤー層が不透明な場合はガスバリヤー層の外側の面に限定されるが、ガスバリヤー層が透明な場合はガスバリヤー層の外側の面でも内側の面でもいずれでもよい。
上記多層積層シートの構成を、筒状に熱接着した時の外側から順に示すと、以下のような構成に分類される。
（イ）ポリオレフィン系樹脂層／接着層／二軸延伸ポリエチレンテレフタレートフィルム（以下、ＰＥＴフィルムと記載する）・絵柄等の印刷層／接着層／透明または不透明なガスバリヤー層／接着層／ポリオレフィン系樹脂層
（ロ）ポリオレフィン系樹脂層／接着層／透明なガスバリヤー層・絵柄等の印刷層／接着層／ポリオレフィン系樹脂層
（ハ）絵柄等の印刷層・ポリオレフィン系樹脂層／接着層／透明または不透明なガスバリヤー層／接着層／ポリオレフィン系樹脂層 The multilayer laminated body having gas barrier properties used for the barrel portion 50 has a simple configuration as the multilayer laminated sheet when the barrel portion 50 is manufactured by thermally bonding a multilayer laminated sheet having gas barrier properties into a cylindrical shape. Then, for example, a laminate sheet in which a printing layer such as a pattern and a gas barrier layer are laminated on an intermediate layer and a polyolefin resin layer is laminated on both sides thereof can be used.
There are no particular restrictions on the position where the printed layer such as a candy or a pattern is provided as long as it is visible from the outside. When the multilayer laminated sheet is thermally bonded in a cylindrical shape, the surface of the outer polyolefin resin layer, that is, the outermost layer. It can also be provided at a position. Even when the gas barrier layer is opaque, the intermediate layer is limited to the outer surface of the gas barrier layer, but when the gas barrier layer is transparent, the gas barrier layer may be either the outer surface or the inner surface. Either is acceptable.
If the structure of the said multilayer laminated sheet is shown in order from the outer side when it heat-bonds to a cylinder shape, it will be classify | categorized into the following structures.
(A) Polyolefin-based resin layer / adhesive layer / biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) / printed layer such as a pattern / adhesive layer / transparent or opaque gas barrier layer / adhesive layer / polyolefin-based resin Layer (b) Polyolefin-based resin layer / adhesive layer / transparent gas barrier layer / printed layer such as pattern / adhesive layer / polyolefin-based resin layer (c) Printed layer such as pattern / polyolefin-based resin layer / adhesive layer / transparent or Opaque gas barrier layer / adhesive layer / polyolefin resin layer

前記ガスバリヤー層の外側と内側に積層するポリオレフィン系樹脂層は、予め製膜したポリオレフィン系樹脂の無延伸フィルムを、接着層に二液硬化型ポリウレタン系接着剤などのドライラミネート用接着剤を用いて、ドライラミネート法で貼り合わせて形成することが好ましいが、接着層にアンカーコート剤を用いて、ポリオレフィン系樹脂を押し出しコートして形成することもできる。
ポリオレフィン系樹脂自体は、例えば、低密度ポリエチレン（ＬＤＰＥ）、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、中密度ポリエチレン（ＭＤＰＥ）、高密度ポリエチレン（ＨＤＰＥ）のほか、アイオノマー、シングルサイト系触媒を用いて重合したエチレン・α−オレフィン共重合体、ポリプロピレンまたはその共重合体などを使用することができる。 The polyolefin resin layer laminated on the outside and inside of the gas barrier layer uses a non-stretched polyolefin resin film formed in advance, and a dry laminate adhesive such as a two-component curable polyurethane adhesive for the adhesive layer. However, it is preferable to form by bonding by a dry laminating method, but it can also be formed by extrusion-coating a polyolefin resin using an anchor coating agent for the adhesive layer.
Polyolefin resins themselves include, for example, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), and high density polyethylene (HDPE), as well as ionomers and single site catalysts. A polymerized ethylene / α-olefin copolymer, polypropylene or a copolymer thereof can be used.

前記ガスバリヤー層としては、前述したように、透明なガスバリヤー層と不透明なガスバリヤー層とがあり、いずれも使用することができる。
透明なガスバリヤー層としては、例えば、エチレン−ビニルアルコール共重合体、ＭＸＤ６（ポリメタキシリレンアジパミド）などのガスバリヤー性樹脂を製膜したフィルムや、ポリ塩化ビニリデンの塗布液を透明な基材フィルムに塗布して塗膜層を形成したポリ塩化ビニリデンコートフィルム、そして、アルミナ、シリカ、酸化亜鉛、酸化マグネシウム、ＩＴＯなどの無機酸化物を透明な基材フィルムに蒸着した無機酸化物の蒸着フィルムなどを使用することができる。
不透明なガスバリヤー層としては、アルミニウム箔などの金属箔や、アルミニウムなどの金属を基材フィルムに蒸着した金属蒸着フィルムを使用することができる。 As described above, the gas barrier layer includes a transparent gas barrier layer and an opaque gas barrier layer, and any of them can be used.
As the transparent gas barrier layer, for example, a film formed of a gas barrier resin such as ethylene-vinyl alcohol copolymer, MXD6 (polymetaxylylene adipamide), or a coating solution of polyvinylidene chloride is used as a transparent base. Polyvinylidene chloride coated film coated on a material film to form a coating layer, and inorganic oxide deposition by depositing inorganic oxide such as alumina, silica, zinc oxide, magnesium oxide, ITO on transparent substrate film A film or the like can be used.
As the opaque gas barrier layer, a metal foil such as an aluminum foil or a metal vapor deposited film obtained by vapor depositing a metal such as aluminum on a base film can be used.

前記無機酸化物の蒸着フィルムは、更に具体的には、アルミナ、シリカ、酸化亜鉛、酸化マグネシウム、ＩＴＯなどの無機酸化物を蒸着やスパッタリング、イオンプレーティングなどの手段で、ＰＥＴフィルムなどの耐熱性を有する透明フィルム上に、厚みが２００〜１０００Å程度になるように堆積させて形成することができる。 More specifically, the inorganic oxide vapor-deposited film is more heat resistant such as PET film by means of vapor deposition, sputtering, ion plating or the like of inorganic oxides such as alumina, silica, zinc oxide, magnesium oxide, and ITO. It can be formed by depositing on a transparent film having a thickness of about 200 to 1000 mm.

このような無機酸化物の蒸着層は単独の層で形成してもよいが、複数の層で形成することにより一層優れたガスバリヤー性を得ることができる。
また、これらの無機酸化物の蒸着層は、その接着性を向上させ、或いは亀裂などの損傷を防止して優れたガスバリヤー性を有効に発揮させるため、その上下の面に接着性向上層、保護層、ガスバリヤー性向上層などの目的で、反応型アクリル系樹脂、ポリウレタン系樹脂、シランカップリング剤を含有させたアクリル系樹脂、金属アルコキシドを含有させた水溶性高分子、エチレン−ビニルアルコール共重合体などの樹脂層を設けて複合層としてガスバリヤー層を形成することができる。 Such an inorganic oxide vapor-deposited layer may be formed as a single layer, but by forming it as a plurality of layers, a more excellent gas barrier property can be obtained.
Further, these inorganic oxide vapor-deposited layers are improved in adhesion, or in order to effectively exhibit excellent gas barrier properties by preventing damage such as cracks, on the upper and lower surfaces thereof, Reactive acrylic resin, polyurethane resin, acrylic resin containing silane coupling agent, water-soluble polymer containing metal alkoxide, ethylene-vinyl alcohol for the purpose of protective layer, gas barrier property improving layer, etc. A gas barrier layer can be formed as a composite layer by providing a resin layer such as a copolymer.

また、前記胴部５０に用いるガスバリヤー性を有する多層積層体は、例えば、中間層にガスバリヤー性樹脂を用い、その両側にポリオレフィン系樹脂を用いて、多層共押し出しチューブ成形法で直接筒状の胴部５０を作製することもできる。
この場合、中間層のガスバリヤー性樹脂には、エチレン・ビニルアルコール共重合体（ＥＶＯＨ）を好適に使用できるが、ＭＸＤ６やポリ塩化ビニリデンなどの樹脂も使用することができる。これらのガスバリヤー性樹脂層と両側のポリオレフィン系樹脂層との間には、必要に応じて接着性を向上させるための接着性樹脂層を設けることができる。 In addition, the multilayer laminated body having gas barrier properties used for the body portion 50 is directly cylindrical by a multilayer coextrusion tube molding method using, for example, a gas barrier resin for the intermediate layer and a polyolefin resin on both sides thereof. It is also possible to produce the body portion 50 of the above.
In this case, ethylene / vinyl alcohol copolymer (EVOH) can be suitably used as the gas barrier resin of the intermediate layer, but resins such as MXD6 and polyvinylidene chloride can also be used. Between these gas barrier resin layers and the polyolefin resin layers on both sides, an adhesive resin layer for improving adhesiveness can be provided as necessary.

上記のように胴部５０を多層共押し出しチューブ成形法で直接筒状に成形した場合、絵柄等の印刷層は、胴部の多層積層体の表面に設けることになるが、無地の胴部５０、またはその一端に前記上部部材７０と外側成形樹脂８０を一体化成形したチューブ容器を作製しておいて、必要な時にいつでも所望の絵柄等の印刷層を設けることができるので、多品種小ロットの需要に対しても、効率的に対応することができる利点がある。
この点は、前記のように胴部５０をガスバリヤー性を有する多層積層シートを筒状に熱接着して作製する場合でも、絵柄等の印刷層を胴部の最外層に設ける構成を採ることにより、同様な効果を得ることができる。 When the body 50 is directly formed into a cylindrical shape by the multi-layer coextrusion tube forming method as described above, a printing layer such as a pattern is provided on the surface of the multilayer laminate of the body, but the plain body 50 Alternatively, a tube container in which the upper member 70 and the outer molding resin 80 are integrally formed at one end thereof is manufactured, and a printing layer for a desired pattern or the like can be provided whenever necessary. There is an advantage that it is possible to efficiently respond to the demand.
In this respect, even when the body 50 is manufactured by thermally bonding a multilayer laminated sheet having gas barrier properties into a cylindrical shape as described above, a configuration in which a printing layer such as a pattern is provided on the outermost layer of the body is adopted. Thus, the same effect can be obtained.

次に、チューブ容器１００の肩部とそれに連続する口頸部６０の内面に挿入し、外側成形樹脂８０と一体化成形して用いる上部部材７０は、先にも説明したように、厚みが４０〜９０μｍのアルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを冷間プレス方式で段階的に成形して作製するが、アルミニウム箔の両面に貼り合わせるポリオレフィン系樹脂フィルムとしては、前記胴部の多層積層シートの両側の面に貼り合わせたポリオレフィン系樹脂フィルムと同じフィルムを使用することができ、具体的には、低密度ポリエチレン（ＬＤＰＥ）、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、中密度ポリエチレン（ＭＤＰＥ）、高密度ポリエチレン（ＨＤＰＥ）のほか、アイオノマー、シングルサイト系触媒を用いて重合したエチレン・α−オレフィン共重合体、ポリプロピレンまたはその共重合体などの無延伸フィルムを使用することができる。 Next, as described above, the upper member 70 that is inserted into the shoulder portion of the tube container 100 and the inner surface of the mouth / neck portion 60 continuous therewith and integrally molded with the outer molding resin 80 has a thickness of 40. A composite sheet in which a polyolefin resin film is bonded to both sides of an aluminum foil of 90 μm is formed in a stepwise manner by a cold press method. The same film as the polyolefin-based resin film bonded to both sides of the multilayer laminated sheet can be used, specifically, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium In addition to high density polyethylene (MDPE) and high density polyethylene (HDPE), ionomers and single-site catalysts are used. Ethylene · alpha-olefin copolymer polymerized Te, the unstretched film such as polypropylene or a copolymer thereof can be used.

また、チューブ容器１００の胴部５０の上部の開口部に、上部部材７０と共に一体化成形して肩部とそれに連続する口頸部６０を形成する外側成形樹脂８０としては、コンプレッション成形や射出成形の成形性と共に、胴部５０の両面および上部部材７０の両面のポリオレフィン系樹脂層との熱溶着性を有し、更に、肩部とそれに連続する口頸部６０に適度の硬さを付与できることも必要であり、そのためには前記胴部５０の両面および上部部材７０の両面に用いたポリオレフィン系樹脂と同様な樹脂を使用することができる。
只、コンプレッション成形や射出成形のために加熱溶融された樹脂の熱を利用して、胴部５０の端縁部および上部部材７０に熱溶着させることから、外側成形樹脂８０には溶融温度の高いポリオレフィン系樹脂を使用することが好ましく、前記必要性能を兼備させるためには、中密度ポリエチレンまたは高密度ポリエチレンを使用することがより好ましい。 In addition, compression molding or injection molding may be used as the outer molding resin 80 which is integrally molded together with the upper member 70 to form the shoulder portion and the mouth-and-neck portion 60 continuous therewith in the upper opening portion of the body portion 50 of the tube container 100. In addition to the moldability, it has heat-weldability with the polyolefin resin layers on both surfaces of the body portion 50 and both surfaces of the upper member 70, and can impart appropriate hardness to the shoulder portion and the mouth-and-neck portion 60 continuous thereto. For this purpose, a resin similar to the polyolefin resin used on both surfaces of the body portion 50 and both surfaces of the upper member 70 can be used.
Since the heat of the resin melted by heating for compression molding or injection molding is used, the outer molded resin 80 has a high melting temperature because it is thermally welded to the edge portion of the body 50 and the upper member 70. It is preferable to use a polyolefin-based resin, and it is more preferable to use medium-density polyethylene or high-density polyethylene in order to combine the necessary performance.

以下に、実施例を挙げて本発明を更に具体的に説明する。 Hereinafter, the present invention will be described more specifically with reference to examples.

図２に示した構成のチューブ容器１００を作製することとし、下記の材料と寸法でチューブ容器を作製して実施例１のチューブ容器とした。
〔１〕胴部５０は、下記の構成の多層積層シートを用いて、直径が３８ｍｍ、長さが１６０ｍｍの円筒形に熱接着して作製した。
（多層積層シートの構成）
無延伸直鎖状低密度ポリエチレンフィルム（厚み１５０μｍ）／接着剤／ＰＥＴフィルム（厚み１２μｍ）・絵柄等の印刷層／接着剤／アルミニウム箔（厚み９μｍ）／接着剤／無延伸直鎖状低密度ポリエチレンフィルム（厚み１５０μｍ）
上記各フィルムの貼り合わせはドライラミネーション法で行い、接着剤には二液硬化型ポリウレタン系接着剤を用いたものである。
〔２〕上部部材７０は、厚み５０μｍのアルミニウム箔の両面に、それぞれ厚み１５０μｍの無延伸中密度ポリエチレンフィルムを二液硬化型ポリウレタン系接着剤を用いてドライラミネーション法で貼り合わせた複合シートを用いて、請求項１に記載した製造方法で、笠状部（肩部）の中心部に有頂筒状の口頸部を有する形状に作製した。
〔３〕肩部とそれに連続する口頸部６０の外側成形樹脂８０には、高密度ポリエチレン（ＨＤＰＥ）を用いた。
上記の胴部５０と上部部材７０および外側成形樹脂（ＨＤＰＥ）を用いて、コンプレッション成形法により、胴部５０の上部の開口部に、その内側に上部部材７０を挿入して肩部とそれに連続する口頸部６０を外側成形樹脂８０で一体化成形してチューブ容器を作製した。 The tube container 100 having the configuration shown in FIG. 2 was produced, and the tube container was produced with the following materials and dimensions to obtain the tube container of Example 1.
[1] The body part 50 was manufactured by thermally bonding into a cylindrical shape having a diameter of 38 mm and a length of 160 mm using a multilayer laminated sheet having the following configuration.
(Configuration of multilayer laminated sheet)
Non-stretched linear low-density polyethylene film (thickness 150 μm) / adhesive / PET film (thickness 12 μm) / printing layer such as pattern / adhesive / aluminum foil (thickness 9 μm) / adhesive / unstretched linear low-density Polyethylene film (thickness 150μm)
The above films are bonded by a dry lamination method, and a two-component curable polyurethane adhesive is used as the adhesive.
[2] The upper member 70 uses a composite sheet in which an unstretched medium-density polyethylene film having a thickness of 150 μm is bonded to both surfaces of an aluminum foil having a thickness of 50 μm by a dry lamination method using a two-component curable polyurethane adhesive. Thus, the manufacturing method described in claim 1 was used to produce a shape having a crest-like mouth-and-neck portion at the center of the cap portion (shoulder portion).
[3] High density polyethylene (HDPE) was used for the outer molded resin 80 of the shoulder and the neck 60 that is continuous with the shoulder.
Using the body 50, the upper member 70, and the outer molding resin (HDPE), the upper member 70 is inserted into the opening of the upper portion of the body 50 by the compression molding method, and the shoulder is continuous with the shoulder. The mouth / neck portion 60 to be formed was integrally molded with the outer molding resin 80 to produce a tube container.

前記実施例１のチューブ容器の構成において、上部部材７０の製造に用いた複合シートの構成のうち、アルミニウム箔の厚みのみを、９０μｍの厚みのアルミニウム箔に変更して上部部材７０を作製したほかは、総て実施例１と同様に作製して実施例２のチューブ容器を作製した。 In the configuration of the tube container of Example 1, in the configuration of the composite sheet used for manufacturing the upper member 70, only the thickness of the aluminum foil was changed to an aluminum foil having a thickness of 90 μm, and the upper member 70 was produced. Were produced in the same manner as in Example 1 to produce the tube container of Example 2.

〔比較例１〕
前記実施例１のチューブ容器の構成において、上部部材７０の形状のみを、従来のロンデル部材と同様に、肩部のみに挿入される形状に変更して一体化成形したほかは、総て実施例１と同様に作製して比較例１のチューブ容器を作製した。 [Comparative Example 1]
In the configuration of the tube container of the first embodiment, all the embodiments are the same except that only the shape of the upper member 70 is changed to a shape to be inserted only into the shoulder portion, similarly to the conventional Rondel member. 1 and the tube container of Comparative Example 1 was produced.

〔比較例２〕
前記実施例１のチューブ容器の構成において、上部部材７０を取り除き、外側成形樹脂８０の高密度ポリエチレンのみで肩部とそれに連続する口頸部を一体化成形したほかは、総て実施例１と同様に作製して比較例２のチューブ容器を作製した。 [Comparative Example 2]
In the configuration of the tube container of the first embodiment, the upper member 70 is removed, and the shoulder portion and the mouth and neck portion continuous therewith are integrally molded with only the high-density polyethylene of the outer molding resin 80. In the same manner, a tube container of Comparative Example 2 was produced.

〔評価〕
以上のように作製した実施例１、２および比較例１、２のチューブ容器について、そのガスバリヤー性を評価するため、それぞれのチューブ容器の一個当たりの酸素透過度と水蒸気透過度を測定した。
尚、測定方法は、酸素透過度は、ＪＩＳ−Ｋ７１２６プラスチックフィルム及びシートの気体透過度試験方法〔Ｂ法（等圧法）〕を準用し、水蒸気透過度は、ＪＩＳ−Ｋ７１２９プラスチックフィルム及びシートの水蒸気透過度試験方法〔Ｂ法（赤外センサー法）〕を準用した。
また、比較例１、２のチューブ容器については、口部が開口しているので、厚み４０μｍのアルミニウム箔を芯材としてその両面に厚み５０μｍの無延伸中密度ポリエチレンフィルムを貼り合わせたシール材を口部に熱接着して封止したものを測定試料とした。 [Evaluation]
In order to evaluate the gas barrier properties of the tube containers of Examples 1 and 2 and Comparative Examples 1 and 2 produced as described above, the oxygen permeability and water vapor permeability per each tube container were measured.
As for the measurement method, the oxygen permeability is JIS-K7126 gas permeability test method for plastic films and sheets [Method B (isobaric method)], and the water vapor permeability is JIS-K7129 plastic film and sheet water vapor. The transmittance test method [Method B (infrared sensor method)] was applied mutatis mutandis.
Moreover, about the tube container of the comparative examples 1 and 2, since the opening | mouth part is opening, the sealing material which bonded the 50-micrometer-thick unstretched medium density polyethylene film on both surfaces by using 40-micrometer-thick aluminum foil as a core material is used. What was thermally bonded to the mouth and sealed was used as a measurement sample.

〔測定結果〕
酸素透過度 [単位: cc/(１個・24h ・atm)、23℃、40％RH]
実施例１０．００１〜０．００２
実施例２０．００１〜０．００２
比較例１０．０１１〜０．０１７
比較例２０．０５９〜０．０６５〔Measurement result〕
Oxygen permeability [Unit: cc / (1 piece / 24h / atm), 23 ℃, 40% RH]
Example 1 0.001-0.002
Example 2 0.001-0.002
Comparative Example 1 0.011-0.017
Comparative Example 2 0.059-0.065

水蒸気透過度 [単位: ｇ/(１個・24h)、40℃、90％RH]
実施例１０．００１以下
実施例２０．００１以下
比較例１０．００２〜０．００３
比較例２０．００２〜０．００４ Water vapor permeability [Unit: g / (1 piece / 24h), 40 ℃, 90% RH]
Example 1 0.001 or less Example 2 0.001 or less Comparative Example 1 0.002 to 0.003
Comparative Example 2 0.002 to 0.004

以上の測定結果から明らかなように、実施例１、２のチューブ容器は、上部部材７０をチューブ容器の肩部とそれに連続する口頸部の全面に用いているので、比較例１、２のチューブ容器と比較して、酸素透過度が非常に小さく格段に優れていた。また、水蒸気透過度については、比較例１、２のチューブ容器も非常に小さいので、実施例１、２と、比較例１、２との差は少ないが、実施例１、２のチューブ容器の水蒸気透過度は殆ど０に近い値であり、特に優れたものである。
また、上記のガスバリヤー性の測定とは別に、実施例１、２のチューブ容器について、その口部を閉鎖している上部部材７０の突き破りによる開封性を、既成のキャップに設けられた突き刺し突起で突き刺して開封したところ、いずれも容易に開封することができ、口部の開封性は良好であった。 As is apparent from the above measurement results, the tube containers of Examples 1 and 2 use the upper member 70 on the entire surface of the shoulder of the tube container and the mouth and neck that are continuous with the upper member 70. Compared with the tube container, the oxygen permeability was very small and remarkably excellent. In addition, regarding the water vapor permeability, the tube containers of Comparative Examples 1 and 2 are also very small, so there is little difference between Examples 1 and 2 and Comparative Examples 1 and 2, but the tube containers of Examples 1 and 2 The water vapor permeability is a value close to 0 and is particularly excellent.
In addition to the measurement of the gas barrier property described above, the tube container of Examples 1 and 2 has a piercing protrusion provided on an existing cap, which is opened by breaking the upper member 70 closing the mouth. When it was pierced and opened, all of them could be easily opened, and the opening of the mouth was good.

本発明のチューブ容器は、特に、水蒸気や酸素などのガスバリヤー性を向上させたものであり、水分の蒸散や酸素により変質しやすい内容物を密封包装するチューブ容器として特に適しているが、一般の内容物、例えば、練り歯磨きのほか、練りわさび、練りからし、コンデンスミルクなどの食品類、化粧品、医薬品など広範囲の内容物に対しても良好に使用できるものであり、充填される内容物や用途に関しては特に制限はない。 The tube container of the present invention has improved gas barrier properties such as water vapor and oxygen, and is particularly suitable as a tube container for hermetically wrapping contents that are easily altered by evaporation of water or oxygen. Contents, such as toothpaste, toothpaste, kneading, foods such as condensed milk, cosmetics, pharmaceuticals, etc. There are no particular restrictions on the application.

本発明のチューブ容器の肩部および口頸部に一体化成形して用いる上部部材の製造方法の工程を説明する図であり、工程別の上部部材の形状を正面図で示したものである。但し、工程（７）の第５の成形体の外周をトリミングする工程は省略して示した。It is a figure explaining the process of the manufacturing method of the upper member used integrally forming in the shoulder part and mouth neck part of the tube container of this invention, and shows the shape of the upper member according to a process with the front view. However, the step of trimming the outer periphery of the fifth molded body in the step (7) is omitted. 本発明のチューブ容器の一実施例の構成を示す要部の断面図である。It is sectional drawing of the principal part which shows the structure of one Example of the tube container of this invention.

符号の説明Explanation of symbols

１笠状部
２筒部
３頂部
４肩部
５口頸部
１０円形の複合シート
１１第１の成形体
１２第２の成形体
１３第３の成形体
１４第４の成形体
１５第５の成形体
５０胴部
６０肩部とそれに連続する口頸部
７０上部部材
８０外側成形樹脂
１００チューブ容器 DESCRIPTION OF SYMBOLS 1 Shade-shaped part 2 Cylinder part 3 Top part 4 Shoulder part 5 Mouth neck part 10 Circular composite sheet 11 1st molded object 12 2nd molded object 13 3rd molded object 14 4th molded object 15 5th molded object Body 50 Torso 60 Shoulder and mouth and neck continuous with it 70 Upper member 80 Outer molded resin 100 Tube container

Claims

チューブ容器の肩部とそれに連続する口頸部の内面に一体化成形して用いられるチューブ容器の上部部材の製造方法であって、少なくとも下記（１）〜（７）に記載された工程を含むことを特徴とするチューブ容器の上部部材の製造方法。
（１）アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを所定の寸法の円形に打ち抜いて、円形の複合シートを作製する工程。
（２）前記円形の複合シートを、第１の雌雄の成形型を用いて常温でプレス成形により、外縁部を笠状に成形すると同時に中心部を有頂筒状に成形し、笠状部の中心に有頂筒部を有する第１の成形体を得る工程。
（３）前記第１の成形体を、第２の雌雄の成形型を用いて常温でプレス成形により、筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第２の成形体を得る工程。
（４）前記第２の成形体を、第３の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第３の成形体を得る工程。
（５）前記第３の成形体を、第４の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくして所定の径に成形すると同時に、筒部の長さを増大させて所定の長さに成形し、且つ笠状部の面積を更に増大させるように成形し、第４の成形体を得る工程。
（６）前記第４の成形体を、第５の雌雄の成形型を用いて常温でプレス成形により、筒部の上端の角部および笠状部の周縁の形状を最終設定形状に成形し、第５の成形体を得る工程。
（７）前記第５の成形体を、所定の外周寸法になるように外周をトリミングして、最終形態の上部部材を得る工程。 A method for producing an upper member of a tube container that is integrally molded on the shoulder of the tube container and the inner surface of the mouth-and-neck portion that includes the shoulder, and includes at least the steps described in (1) to (7) below. A method for producing an upper member of a tube container.
(1) A step of producing a circular composite sheet by punching a composite sheet in which a polyolefin resin film is bonded to both surfaces of an aluminum foil into a circular shape having a predetermined size.
(2) The circular composite sheet is formed by pressing at a normal temperature using a first male and female mold, and the outer edge portion is formed into a cap shape, and at the same time, the center portion is formed into a top tube shape. The process of obtaining the 1st molded object which has a top cylinder part in the center.
(3) The first molded body is molded by press molding at room temperature using a second male and female mold so as to increase the area of the cap portion while reducing the diameter of the cylindrical portion, The process of obtaining the molded object.
(4) The second molded body is molded by press molding at room temperature using a third male and female mold so as to increase the area of the cap-shaped portion while further reducing the diameter of the cylindrical portion, A step of obtaining the molded product of 3.
(5) The third molded body is formed into a predetermined diameter by further reducing the diameter of the cylindrical portion by press molding at room temperature using a fourth male and female molding die, and at the same time, the length of the cylindrical portion is reduced. A step of obtaining a fourth molded body by increasing the size to a predetermined length and further increasing the area of the cap-shaped portion.
(6) The fourth molded body is molded into a final set shape by press molding at room temperature using a fifth male and female molding die, and the corners of the upper end of the cylindrical portion and the periphery of the cap-shaped portion, A step of obtaining a fifth molded body.
(7) A step of trimming an outer periphery of the fifth molded body so as to have a predetermined outer peripheral size to obtain an upper member in a final form.

筒状の胴部の一端に、肩部とそれに連続する口頸部が一体化成形されてなるチューブ容器において、胴部がガスバリヤー性を有する多層積層体で形成され、肩部とそれに連続する口頸部が、その内側の面に配置されたアルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせてなる複合シートを予め肩部とそれに連続する口頸部の内面形状に合わせて成形された上部部材と、その外側を覆って一体化成形された外側成形樹脂とで形成されると共に、該上部部材が、少なくとも下記（１）〜（７）に記載された工程を含む製造方法で製造されたものであることを特徴とするチューブ容器。
（１）アルミニウム箔の両面にポリオレフィン系樹脂フィルムを貼り合わせた複合シートを所定の寸法の円形に打ち抜いて、円形の複合シートを作製する工程。
（２）前記円形の複合シートを、第１の雌雄の成形型を用いて常温でプレス成形により、外縁部を笠状に成形すると同時に中心部を有頂筒状に成形し、笠状部の中心に有頂筒部を有する第１の成形体を得る工程。
（３）前記第１の成形体を、第２の雌雄の成形型を用いて常温でプレス成形により、筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第２の成形体を得る工程。
（４）前記第２の成形体を、第３の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくしながら笠状部の面積を増大させるように成形し、第３の成形体を得る工程。
（５）前記第３の成形体を、第４の雌雄の成形型を用いて常温でプレス成形により、更に筒部の径を小さくして所定の径に成形すると同時に、筒部の長さを増大させて所定の長さに成形し、且つ笠状部の面積を更に増大させるように成形し、第４の成形体を得る工程。
（６）前記第４の成形体を、第５の雌雄の成形型を用いて常温でプレス成形により、筒部の上端の角部および笠状部の周縁の形状を最終設定形状に成形し、第５の成形体を得る工程。
（７）前記第５の成形体を、所定の外周寸法になるように外周をトリミングして、最終形態の上部部材を得る工程。 In a tube container in which a shoulder portion and a mouth-and-neck portion continuous therewith are integrally formed at one end of a cylindrical body portion, the body portion is formed of a multilayer laminate having gas barrier properties, and is continuous with the shoulder portion. The upper part where the neck and neck are molded in advance according to the shape of the inner surface of the shoulder and the mouth and neck that is continuous with a composite sheet made by laminating a polyolefin resin film on both sides of the aluminum foil placed on the inner surface of the mouth and neck The upper member is manufactured by a manufacturing method including at least the steps described in (1) to (7) below, and the upper member is formed of a member and an outer molding resin that is integrally molded to cover the outer side of the member. A tube container characterized by being a thing.
(1) A step of producing a circular composite sheet by punching a composite sheet in which a polyolefin resin film is bonded to both surfaces of an aluminum foil into a circular shape having a predetermined size.
(2) The circular composite sheet is formed by pressing at a normal temperature using a first male and female mold, and the outer edge portion is formed into a cap shape, and at the same time, the center portion is formed into a top tube shape. The process of obtaining the 1st molded object which has a top cylinder part in the center.
(3) The first molded body is molded by press molding at room temperature using a second male and female mold so as to increase the area of the cap portion while reducing the diameter of the cylindrical portion, The process of obtaining the molded object.
(4) The second molded body is molded by press molding at room temperature using a third male and female mold so as to increase the area of the cap-shaped portion while further reducing the diameter of the cylindrical portion, A step of obtaining the molded product of 3.
(5) The third molded body is formed into a predetermined diameter by further reducing the diameter of the cylindrical portion by press molding at room temperature using a fourth male and female molding die, and at the same time, the length of the cylindrical portion is reduced. A step of obtaining a fourth molded body by increasing the size to a predetermined length and further increasing the area of the cap-shaped portion.
(6) The fourth molded body is molded into a final set shape by press molding at room temperature using a fifth male and female molding die, and the corners of the upper end of the cylindrical portion and the periphery of the cap-shaped portion, A step of obtaining a fifth molded body.
(7) A step of trimming an outer periphery of the fifth molded body so as to have a predetermined outer peripheral size to obtain an upper member in a final form.

前記上部部材に用いる複合シートのアルミニウム箔の厚みが４０〜９０μｍであることを特徴とする請求項２に記載のチューブ容器。 The tube container according to claim 2, wherein the thickness of the aluminum foil of the composite sheet used for the upper member is 40 to 90 µm.