JPH09110030A - Composite container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a composite container which can be securely sealed and kept airtight and also easily and repeatedly sealed and which is excellent in handling and vapor-proof properties. SOLUTION: A cover body 3 provided with a synthetic resin cover frame 9 integrally formed at the peripheral edge of an inner seal material 8 which is peelable between layers, is put on a container 2. The inner seal material 8 is welded with ultrasonic waves over the opening edge member 7 of the container 2 to close the opening of the container 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite container including a container body made of a composite material containing paper as a main material, and a lid attached to the container body.

[0002]

Conventionally, in a container for storing powder, for example, a container for storing easily hygroscopic foods such as powdered coffee, powdered milk, and powdered cheese, the container body is made of glass and the product is distributed. In order to prevent moisture absorption at the stage, the opening of the container body was sealed with a sealing material having excellent barrier properties. Then, this sealing method is such that a sealing material having a laminated laminated structure is fitted in advance on the inner surface of the cap that opens and closes the opening of the container body, and the cap is attached after the container body is filled with the contents. I'm tightening. An adhesive is applied to the opening edge of the container body so that the sealing material is bonded to the opening edge when the cap is attached. In addition, an aluminum foil layer is laminated on the sealing material side, and after mounting the cap, high frequency is applied from the cap side to heat the aluminum foil layer portion to melt the sealing surface of the sealing material and weld it to the opening edge of the container body. There was also a method of performing high frequency welding.

However, these methods require the work of fitting the sealing material into a separately molded cap, which is a disadvantage that the container cannot be manufactured efficiently. In addition, since the container body is made of glass, the product becomes heavy, requires careful handling, and is difficult to dispose of. In this regard, it is considered that the container body is made of a composite material whose main material is paper, for example, a cup-shaped container, but in the present situation, the container body is sealed with a film material to be heat-sealed. Since the film material is peeled off at the time of opening, re-sealing cannot be surely performed.

Therefore, in the present invention, attention is paid to the ease of handling and disposal of a container made of a composite material containing paper as a main material, and a composite container in which a large proportion of paper is used is used. The purpose of the present invention is to ensure that the container body can be reliably sealed until it is opened again, and that it can be easily resealed, and to obtain a container that is easy to handle and has excellent moisture resistance.

[0005]

The present invention has been made in view of the above-mentioned problems, and the container body is formed into a molding die at the periphery of the opening of the container body which is made of a composite material whose main material is paper and whose upper surface is open. A container integrally provided with an opening edge member made of a synthetic resin, which is made by insert molding in which the resin is inserted and injected, and the inner seal material made of a laminated material capable of peeling between layers. A lid frame made of a synthetic resin formed by an insert molding method in which the resin is inserted and placed in a container is integrally provided, and a lid body that covers the container in an openable and closable manner is provided, and the inner seal material is welded across the opening edge member. Alternatively, the above-mentioned problem is solved by providing a composite container characterized in that the inner seal material is adhered to close the opening of the container. A composite container in which the lid frame of the lid is integrally connected to the opening edge member of the container via a hinge,
Further, the present invention also provides a composite container including a mounting frame member fitted to the opening edge member of the container, and the lid frame of the lid being connected to the mounting frame member via a hinge.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the embodiments shown in FIGS. Reference numeral 1 in the figure denotes a composite container in which a lid 3 is attached to the upper surface of the container 2 and closed.
The container 2 has a cup-like shape with an open upper surface, and has a laminated material composed of a composite material a having a paper layer and a barrier layer, which are main materials, and a synthetic resin layer having an outermost layer and an innermost layer, and a body portion 4. A container body 6 having a bottom 5 is formed. The body portion is formed into a tubular shape with one side open, and the opposite sides of the composite material are attached to each other, and the lower end of the body portion is integrally fastened together with the peripheral edge of the bottom portion in a wound state. . In this way, heat sealing between the body and the bottom is performed on the rolled-in portion of the body and the bottom in the same manner as the conventional bottom treatment of the paper cup, and the opposing synthetic resin layers are fused and integrated. Is.

The composite material a has water resistance to the inside and outside of the container, a gas barrier property, and a light-shielding property, so that the container body 6 is provided with a continuous barrier property on the outer peripheral surface and the bottom surface. become. Specifically, an aluminum foil, an aluminum vapor deposition film, and a film obtained by vapor deposition of an inorganic substance such as silicon oxide are laminated on one surface of a paper material as a main material. In this way, since the composite material is continuous, the function of the composite material is not divided, and the function becomes effective from the body peripheral surface and the body to the bottom.

The body portion 4 extends along the periphery of the opening of the container body 6.
Is provided with an opening edge member 7 made of a synthetic resin for covering the upper end surface (end surface of the composite material) of the composite material. The opening edge member 7 has a container body previously placed in a mold and is injected with a synthetic resin for injection molding. Body 4 integrated by insert molding
Is heat-welded to the outermost and innermost synthetic resin layers. In this way, since the opening edge member is formed by insert molding and fusion with the synthetic resin layer on the body part side is achieved, the molding material of the opening edge member and the material of the synthetic resin layer of the body member are made of the same resin and the same kind. It is preferably a resin. Further, it is preferable that the opening edge member is hard, and when polyethylene resin is used, high density polyethylene can be selected, and when polypropylene resin is used, homotype with little (or no) ethylene content can be selected. To secure impact resistance or to secure the durability of hinges, which will be described later, select a block type or random type having a large ethylene content. Further, when importance is attached to the fitting property, it is preferable to use a medium to low density polyethylene.

The lid 3 is integrally provided with a synthetic resin lid frame 9 on the periphery of the inner seal material 8 facing the container 2, and the synthetic resin continuous with the lid frame 9 is provided on the upper surface of the inner seal material 8. The cover portion 10 is integrally provided. As shown in FIG. 3, the inner seal material 8 is a laminated material which is composed of a polyethylene film layer 11, a peeling varnish layer 12, an aluminum foil layer 13, a polyethylene film layer 11 and a glassine layer 14 and which can be peeled from the cover portion 10 side. In addition, it also has water resistance, gas barrier properties, and light shielding properties. The inner peripheral edge of the inner seal material 8 and the lid frame 9 and the cover portion 10 on the upper side are the inner seal material 8 and
The container body is placed in a mold in advance, and a synthetic resin is injected to perform injection molding, which is integrated by insert molding. The end surface of the inner seal material 8 is covered with the lid frame 9, and half cut cuts 15 are provided along the lid frame 9 to peel the inner seal material 8 and transfer it to the container body side as described later. Has been. The cut 15 can be formed, for example, by providing a blade in an insert molding die for injection-molding the lid frame and the cover, and inserting the blade from the surface corresponding to the container body when the mold is clamped.

As shown in FIG. 1, the opening edge member 7 of the container 2 and the lid frame 9 of the lid 3 are integrally connected via a hinge 16, and the opening edge member 7, the lid frame 9 and the cover portion 10 are connected. Are molded at the same time. That is, in this composite container 1, the container body and the inner seal material are arranged together in an insert molding die having both a portion holding the container body and a portion holding the inner seal material. The opening edge member and the lid frame, which are connected by a hinge by injection molding, are molded. Thus, the container main body and the inner seal material are set, and the opening edge member, the lid frame, and the cover portion are injection-molded at the same time, so that the container 2 and the lid body 3 can be obtained at the same time. Then, as described above, if the inner seal material of the lid body 3 is cut with a molding die, the manufacturing efficiency of the container is improved.

In this composite container 1, after the container 2 is filled with the contents, the lid 3 is closed, and ultrasonic processing 17 is applied from above the lid 3 to the inner seal material 8 and the opening edge member 7. The inner seal material 8 is ultrasonically welded (the aluminum foil layer is heated to melt and weld the joint surface of the opening edge member) over the opening edge member 7 to cover the upper surface of the container. The inner seal material 8 is closed. Then, when the lid 3 is pulled up, the inner seal material 8 is peeled from the peeling varnish layer 12 and transferred to the container side, and the inner seal material 8 closing the upper surface of the container 2 is exposed as shown in FIG. To do. Then, the inner seal material 8 may be broken to open the container, and the lid 3 may be removed after the contents are taken out.
It can be resealed at. Since the inner seal material is transferred from the lid side to the container side by the initial pulling up of the lid body, it has an effect of preventing tampering. Although the inner seal material is welded to the container by ultrasonic welding in the above-mentioned embodiment, the welding in the present invention is not limited to this, and includes welding by high frequency welding, for example. In that case, since the surface to be joined with the container cannot be welded with the glassine layer, it is necessary to change the laminated structure of the inner seal material. It is conceivable to have a laminated structure of an aluminum foil layer and a polyethylene film layer (sealant layer). Alternatively, when high frequency welding is performed using an inner seal material in which the container bonding surface of the inner seal material is a glassine layer, it is necessary to apply an adhesive agent.

Further, in the above example, the opening edge member of the container and the lid frame of the lid body are integrally formed, but the present invention is not limited to this. For example, as shown in FIG. 4, the opening edge member 7 provided integrally with the container body 6 is provided.
A mounting frame member 18 that can be fitted to the mounting frame member 18 can be provided. In this case, the mounting frame member 18 and the lid frame 9 and the cover portion 10 of the lid body 3 are integrally injection-molded, and the lid body 3 to which the mounting frame member 18 is connected via the hinge 16 is separately provided. It may be manufactured. The lid 3 thus obtained can be integrated with the container 2 by fitting the mounting frame member 18 to the opening edge member 7 of the container 2, and the contents can be filled and ultrasonic welding can be performed by the above-described procedure. Becomes

Further, although the cover is provided with the cover in the above example, it is possible to omit the cover. That is, the inner sealing material is insert-molded on a synthetic resin lid frame (annular), and the inner sealing material in this case is composed of a polyethylene film layer, a glassine layer, and a polyethylene film layer in this order from the outside. , A peeling varnish layer, an aluminum foil layer, and a polyethylene film layer can be considered. The opening edge member and the lid frame may be integrated as in the example shown in FIG.
The mounting frame member and the lid frame may be integrated as in the example shown in FIG.

[0014]

As described above, according to the composite container of the present invention, the resin is prepared by inserting the container body into the molding die at the periphery of the opening of the container body which is made of a composite material whose main material is paper and whose upper surface is open. By inserting and arranging this inner seal material into a molding die, the container is integrally provided with an opening edge member made of synthetic resin by the insert molding method for injection, and the inner seal material is made of a laminated material capable of peeling between layers. A lid frame made of a synthetic resin formed by an insert molding method for injecting the container is integrally provided, and a lid body that opens and closes the container is provided, and an inner seal material is welded or bonded across the opening edge member, The inner sealing material closes the opening of the container. As described above, since the inner seal material is provided on the lid side in advance, the work of fitting the inner seal material into the cap as in the conventional case is not required, and the manufacturing efficiency of the container is improved. And because the container body uses a composite material whose main material is paper, the container becomes lighter,
Easy handling and disposal. Further, since it is provided with the lid, it is possible to surely re-seal, and it is possible to obtain an effect of excellent practicality.

[Brief description of the drawings]

1A and 1B show a composite container according to the present invention, in which FIG. 1A is an explanatory view showing a state in which a lid is closed from above, and FIG. 1B is an explanatory view showing a state before filling contents in a cross section; (C) is an explanatory view showing a state in which ultrasonic processing is performed.

FIG. 2 is an explanatory view in cross section showing a state where the inner seal material is peeled off to cover the container.

FIG. 3 is an explanatory diagram showing a cross section of an inner seal member.

FIG. 4 is an explanatory view showing an example having a mounting frame member in section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Composite container 2 ... Container 3 ... Lid body 6 ... Container body 7 ... Opening edge member 8 ... Inner sealing material 9 ... Lid frame 15 ... Cut 16 ... Hinge

Claims (3)

[Claims] 1. An opening made of synthetic resin, which is formed by an insert molding method in which the container body is inserted and arranged in a molding die at the periphery of the opening of the container body made of a composite material whose main material is paper and whose upper surface is open. A container made of synthetic resin made by an insert molding method, in which a container integrally provided with an edge member and an inner seal material made of a laminated material capable of delamination are inserted into the molding die and the resin is injected into the mold. A lid frame is integrally provided to cover the container so as to be openable and closable, and an inner seal material is welded or adhered across the opening edge member, and the inner seal material closes the opening of the container. A composite container characterized in that 2. The composite container according to claim 1, wherein the lid frame of the lid is integrally connected to the opening edge member of the container via a hinge. 3. The composite container according to claim 1, further comprising a mounting frame member fitted to the opening edge member of the container, wherein the lid frame of the lid is connected to the mounting frame member via a hinge.