JPS5993635A - Liquid vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid container for storing liquids such as fruit drinks, and in particular to a container body made of waterproof paperboard and shaped like a bottomed box with an open top end, which has a protruding opening at the open top end. The present invention relates to a liquid container having a structure in which an integral plastic top plate is fitted.

FIG. 1 shows a conventional liquid container of this type. To briefly describe its structure, the container body 1 is shaped like a box with an open top and a bottom.
is composed of a paperboard 2 and a waterproof layer 3 provided on the inner surface of the paperboard 2 in the form of a sand inch, mainly made of aluminum foil and polyethylene film welded on both sides, and a top plate 4 is provided on the open upper end of the waterproof layer 3. is fitted. This top plate 4 is an integrally molded glass product having an upwardly protruding opening 5 in the center, and is fixedly fitted by welding the circumferential side part 4a to the inner waterproof layer 3 of the container body 1. has been done. The protrusion opening 5 has a threaded portion 5a on the outer surface of the peripheral wall, and can be closed by removably screwing a cap (not shown) thereinto.

By the way, although the above-mentioned conventional liquid containers have good waterproof properties, they have poor gas barrier properties, causing deterioration of the liquid content, resulting in problems with storage stability.

In other words, in the above-mentioned conventional liquid container, the container main body 1 has a waterproof layer 3 mainly made of aluminum foil on the inner surface and has excellent gas barrier properties, but the top plate 4 with the protruding opening 5 is a problem. Because we use olefin plastics such as polyethylene and polypropylene for safety to the human body,
It had good waterproof properties, but had the disadvantage of poor gas barrier properties.

Therefore, in the past, aluminum foil 6 was pasted on the top surface of the top plate 4, but the gas barrier properties of the peripheral wall of the protruding opening 5 rising from the top plate 4 were poor (but the gas barrier properties were not as good as expected). At present, no improvement has been achieved.

This invention was made in view of the above circumstances, and its purpose is to provide a liquid container that is not only waterproof but also has excellent gas barrier properties and has good storage stability for stored liquid. .

In other words, the liquid container of this invention has a multi-layered structure including the top plate with the protrusion part fitted to the open upper end of the container body, including the peripheral wall of the protrusion part, and at least the inner layer of the top plate. is molded from olefin glass material such as polyethylene or polypropylene to ensure human safety, and the outer layer or intermediate layer is molded from ionomer or ethylene-acetic acid copolymer, gas barrier gelastic material such as 7-lyamide, or metal foil. This is the configuration.

A first embodiment of the present invention will be explained below with reference to FIG. In addition, 11 in the figure is a container body which is made of paperboard 12 and has a waterproof layer 13 mainly made of aluminum foil on the inner surface, as in the conventional case, and has a bottomed box shape with an open top end, and 14 in the figure is a container body 11.
This is a top plate with a protruding opening 15 fitted to the open upper end of the top plate.

Here, the top plate 14 and the peripheral wall of the protruding port 15 that rises integrally from the center thereof are constructed as an inner and outer two-layer structure by means of insert molding or two-color molding, and the inner layer 16
is an olefin-based plastic material such as polyethylene or polypropylene that is safe for the human body, and the outer layer N is made of gas barrier glass material such as ionomer, ethylene-vinyl acetate copolymer, or polyamide. A screw thread 15a for screwing the cap is integrally formed on the outer periphery, and a peripheral side portion 14g of the top plate 14 is formed by extending the inner layer 16.

Therefore, if the top plate 14 with the protrusion port 15 having the above-described configuration is fitted to the open upper end of the container body II by welding the peripheral side portion 14a, the top plate 14 and the protrusion port can be removed from the container body 11. The entire structure, including the peripheral wall of the portion 15, is not only waterproof but also has excellent gas barrier properties, making it possible to store the liquid content for a long period of time without deteriorating its quality. Furthermore, since the barrier material layer does not come into direct contact with the liquid content, there is no need to worry about any negative effects on the human body even when the container is used as a beverage container.

Next, a second embodiment of the present invention will be described with reference to FIG. Here, the top plate 14 and the protruding opening portion 15 rising integrally from the center thereof are shown.
The surrounding wall is constructed as a three-brow structure by three-color molding,
The inner layer 16 and outer layer 18 are made of the same olefin plastic material as described above, and the intermediate layer 19 is made of a gas barrier glass material. The rest is the same as the first embodiment, and the same effects can be obtained.

In the case of the three-layer structure shown in FIG. 3 above, a metal foil such as aluminum foil or a gas barrier/glass material is attached to the outside of the inner layer 16 made of an olefin plastic material by means of adhesion, insert molding, hot stamping, etc. A film or gas barrier plastic multilayer film may be provided as the intermediate layer 19, and an outer layer 18 made of an olefin plastic material may be formed by two-color molding on the outside of the intermediate layer 19. Effects can be obtained.

Next, a third embodiment of the present invention will be explained in the fourth section. Here, the top plate 14 and the protruding opening portion 1 rising up from the center thereof are shown.
The peripheral wall of 5 is formed into a three-layer structure of an inner layer (skin layer) 20, an intermediate layer (core layer) 21, and an outer layer (skin layer) 22 by sandwich molding, and the inner and outer skin layers 20 and 22 are made of olefin. The intermediate core layer 21 is made of a gas barrier plastic material.

The other configurations are the same as in the third edition, and the same effects can be obtained.

Since this invention has been made as described in detail above, it is not only waterproof as a liquid container but also has excellent gas barrier properties, and can be stored for a long time without deteriorating the content liquid, and can also be used for beverages. It has great practicality as there is no problem of adverse effects on the human body.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a conventional example, Fig. 2 is an enlarged cross-sectional view, partially omitted, showing a first embodiment of the present invention, and Fig. 3 is a partially omitted enlarged cross-sectional view showing a second embodiment of the present invention. Enlarged sectional view, 4th
The figure is an enlarged cross-sectional view, partially omitted, showing a third embodiment of the invention. 1.11... Container body, 2.12... Paperboard, 3゜1
3... Waterproof/water layer, 4, 14... Top plate, 4 a +
14 a... Circumferential side part, 5.15... Projection opening part, 5
a, 15a...screw thread 16.20...inner layer, 17.
18.22...outer layer, 19°21...middle layer. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) The container body is made of paperboard with a waterproof layer mainly made of aluminum foil or the like on the inner surface, and is shaped like a box with an open top and a cap that can be opened and closed by attaching and removing the cap. A plastic top plate integrally formed with a possible ejection port is fitted, and the top plate has a multilayer structure including a peripheral wall of the ejection port integral with the top plate, and
- At least the inner layer is made of an olefin plastic material such as polyethylene or polypropylene, and the outer layer or intermediate layer is made of a gas barrier glass material such as an ionomer, ethylene-acetic acid copolymer, or polyamide, or metal foil. liquid container.