JPH0322096Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to a paper-based sealed container that is mainly used to store beverages such as juice, other liquids, powders, and granules.

BACKGROUND ART Metal cans have been commonly used as sealed containers. However, since metal cans cannot be incinerated, they are difficult to dispose of after use, resulting in so-called can pollution. Therefore, paper-based sealed containers have recently begun to appear. The paper-based sealed container includes a body wall and a top wall thereof. The trunk wall is formed by bending a sheet-like laminated material based on paper into a cylindrical shape and joining both ends thereof. On the other hand, the top wall is formed into a shallow cup shape and is fitted and fixed to the inner surface of the upper end of the body wall, and is made of aluminum, thermoplastic synthetic resin, or the same laminated material as the body wall. The material is known.

Problems to be solved by the invention It is desirable that the above-mentioned container satisfy the following conditions. First, the containers are cheap because they are disposable. For this purpose, it is necessary that the top wall including the trunk wall be made of inexpensive materials. Second, when fixing the top wall to the body wall during the container manufacturing process, this can be done reliably, and the container is convenient to handle during the container distribution process, and the contents can be easily taken out. The container must retain its shape. For this purpose, it is necessary to provide the top wall with appropriate rigidity as a whole, since rigidity cannot be expected from the trunk wall made of paper as a base material.

By the way, as mentioned above, in conventional containers,
Laminated materials based on aluminum, thermoplastic synthetic resin, or paper are used as the material for the top wall, but since each material is used individually, the above-mentioned problems will occur when using any of the materials. The problem is that each condition is not met. In other words, if aluminum is used as the material, aluminum is the best material for the top wall due to its rigidity, but it is expensive and requires large-scale equipment to form into a cup shape. shall be. Further, when the material is a thermoplastic resin, the thermoplastic resin has poor rigidity. In order to impart rigidity to a thermoplastic resin, it is possible to make it thicker, but this increases the weight and increases the material cost, making it uneconomical. Further, when the material is a laminated material whose base material is paper, it is difficult to form such a laminated material alone into a cup shape.

The purpose of this invention is to provide a paper-based sealed container that solves the above problems.

Means for Solving the Problems In order to achieve the above-mentioned purpose, the paper-based sealed container of this invention sequentially includes a thermoplastic synthetic resin layer, a paper-based layer, an adhesive layer, an aluminum foil layer, and a thermoplastic synthetic resin layer from the outside. It has a trunk wall that is integrally constructed of layers, a top wall that has the same structure as the trunk wall, and an annular connecting frame made of thermoplastic synthetic resin that connects both walls. , a horizontal inner edge portion is fixed to the upper surface of the top wall, and the outer periphery of the connecting frame has a rising portion fixed to the inner surface of the upper end of the trunk wall, followed by a raised portion fixed to the upper surface of the trunk wall. A short tube made of thermoplastic synthetic resin is tightly fitted in a penetrating manner at a predetermined position on the top wall, and the horizontal outer edge provided at the lower end of the short tube is in contact with the top wall. The opening of the short tube is fixed to the lower surface of the wall, and the opening of the short tube is covered with a lid with a knob made of thermoplastic synthetic resin, which is fixed to the upper end of the opening in a removable manner. When opening the sealed container, the opening is obtained by pulling the knob diagonally upward and removing it from the upper end of the opening.

In the above, polyethylene is generally used as the thermoplastic synthetic resin because of its low cost and ease of lamination. A thermoplastic synthetic resin, particularly polyethylene, is also used for the adhesive layer, but any material other than polyethylene may be used as long as it can reliably bond the aluminum foil and paper. Since the rising portion of the connecting frame is fixed to the inner surface of the upper end of the trunk wall, it is sufficient for the horizontal outer edge of the connecting frame to simply contact the upper surface of the trunk wall, but it is of course possible to fix it. .

Embodiment An embodiment of this invention will be described below with reference to the drawings.

The paper-based sealed container includes a trunk wall 6 integrally composed of a polyethylene layer 1, a paper main layer 2, a polyethylene layer 3 as an adhesive layer, an aluminum foil layer 4, and a polyethylene layer 5 in order from the outside; A polyethylene annular connecting frame 1 that connects the top wall 7 and bottom wall 8 having the same configuration as the body wall 6 and the top wall 7.
0, and a polyethylene annular connecting frame 11 connecting the trunk wall 6 and the bottom wall 8.

The inner periphery of the connecting frame 10 on the top wall 7 side is provided with a horizontal inner edge portion 13 that is fixed to the lower surface of the top wall 7, and the outer periphery of the connecting frame 10 is provided with a horizontal inner edge portion 13 that is attached to the inner surface of the upper end of the trunk wall 6. A fixed raised part 14 is provided, followed by a horizontal outer edge part 15 abutting the upper surface of the trunk wall 6, and at a predetermined position on the top wall 7 is a polyethylene molding having an oval contour. A horizontal outer edge portion 9b provided at the lower end of the short tube 9, into which the short tube 9 is tightly fitted in a penetrating manner.
is fixed to the lower surface of the top wall 7, and the opening of the short tube 9 is covered with a lid 19 made of polyethylene with a knob, which is removably attached to a horizontal inner edge 9a projecting slightly inward at the upper end of the opening. It is fixed. The knob 18 has a finger hole 24 formed therein.

On the inner periphery of the connecting frame 11 on the bottom wall 8 side, there are provided upper and lower horizontal inner edge portions 20 and 21 that sandwich the peripheral edge of the bottom wall 8 and are fixed thereto, and on the outer periphery of the connecting frame 11. , a hanging portion 22 fixed to the inner surface of the lower end of the trunk wall 6, and a horizontal outer edge portion 23 subsequent to the hanging portion 22 in contact with the lower surface of the trunk wall 6.

Top wall 7 and bottom wall 8 and their respective connecting frames 1
0 and 11 are integrally molded at the same time, and the connecting frames 10 and 11 are fused to the body wall 6 by high frequency heating. The short tube 9 is fitted into a through hole in the top wall 7 before the upper connecting frame 10 is fused to the trunk wall 6, and its lower horizontal outer edge 9b is fixed to the lower surface of the top wall 7 by ultrasonic waves. Above that, horizontal inner edge 9a
The peripheral edge of the lid 19 is fixed using ultrasonic waves.

The body wall 6 is made by bending a single laminate into a cylindrical shape, overlapping both ends thereof, and fusing them together by high-frequency heating. Fig. 3 shows how the two ends are joined. ing. That is, a portion of the polyethylene layer 1 and the paper layer 2 at the inner end of the overlapped ends are removed, and the polyethylene layer, which is the adhesive layer exposed as a result of removal, is removed from the polyethylene layer at the outer end. It is fused to the inner polyethylene layer.

To open a sealed container, pull the knob 18 diagonally upwards toward the outside of the sealed container.
The lid 19 is peeled off from the upper end of the opening to reveal the opening.

Although not shown, when forming the trunk wall, the inner side of both overlapping ends is folded back.
The inner polyethylene layer may be fused to the inner polyethylene layer of the outer one, or the two ends may be overlapped as they are, and the inner polyethylene layer of the outer one and the outer polyethylene layer of the inner one may be fused. In addition, a thermoplastic synthetic resin tape may be applied to cover the inner end surface.

In addition to the one shown in the drawings, the bottom wall may also have a different structure mainly made of paper or one mainly made of a thermoplastic synthetic resin plate.

Effects of the invention The paper-based sealed container according to this invention has a body wall integrally composed of a thermoplastic synthetic resin layer, a paper main layer, an adhesive layer, an aluminum foil layer, and a thermoplastic synthetic resin layer in order from the outside. It has a top wall with the same structure as the walls and a ring-shaped connecting frame made of thermoplastic synthetic resin that connects both walls. No expensive aluminum is used, and most of the container is made of paper. Since it is made of a laminated material, the cost will not increase and the weight will not increase.

Further, the inner periphery of the connecting frame is provided with a horizontal inner edge portion that is fixed to the lower surface of the peripheral edge portion of the top wall.
The outer periphery of the connecting frame is provided with a rising portion fixed to the inner surface of the upper end of the trunk wall, and a horizontal outer edge portion that is subsequently in contact with the upper surface of the trunk wall. The top wall made of the laminated material has no elasticity and is difficult to deform in that direction, and the trunk wall, top wall, and connecting frame can be reliably fixed to each other. In addition, the rigidity required to maintain the shape of the container can be ensured.

Furthermore, a short tube made of thermoplastic synthetic resin is tightly fitted in a predetermined position on the top wall in a penetrating manner, and the horizontal outer edge provided at the lower end of the short tube is fixed to the lower surface of the top wall. The opening is covered with a thermoplastic synthetic resin lid with a knob and this is removably fixed to the top of the opening, so not only can it be opened easily by pulling the knob, but the top wall can also be easily opened by pulling the lid. Even though the base material is made of laminated material, the end face of the part of the top wall where the short tube penetrates is covered by the short tube, and the end face is exposed inside the container. Therefore, the contents will not ooze out from the same end surface.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Fig. 1 is a plan view with each layer partially removed from above, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 1.
It is an enlarged sectional view taken along the - line in the figure. 1, 5... thermoplastic synthetic resin layer (polyethylene layer), 2... paper main layer, 3... adhesive layer (polyethylene layer), 4... aluminum foil layer, 6... trunk wall, 7... top Wall, 9...Short tube, 9b...Horizontal outer edge of the short tube, 10...Annular connecting frame made of thermoplastic synthetic resin (annular connecting frame made of polyethylene), 13...Horizontal inner edge, 14...Rising portion, 15...Horizontal outer edge portion, 18...Pick, 19...Lid.

Claims (1)

[Scope of utility model registration request] A trunk wall 6 integrally composed of a thermoplastic synthetic resin layer 1, a paper main layer 2, an adhesive layer 3, an aluminum foil layer 4, and a thermoplastic synthetic resin layer 5 in order from the outside.
, a top wall 7 having the same structure as the trunk wall 6, and an annular connecting frame 10 made of thermoplastic synthetic resin that connects both walls 6 and 7.
A top wall 7 is provided on the inner periphery of the connecting frame 10.
Horizontal inner edge 1 fixed to the lower surface of the peripheral edge of
3, and on the outer periphery of the connecting frame 10, a rising portion 14 fixed to the inner surface of the upper end of the trunk wall 6;
Following this, a horizontal outer edge portion 15 is provided which is in contact with the upper surface of the trunk wall 6, and at a predetermined position on the top wall 7,
A short tube 9 made of thermoplastic synthetic resin is tightly fitted in a penetrating manner, a horizontal outer edge 9b provided at the lower end of the short tube 9 is fixed to the lower surface of the top wall 7, and an opening of the short tube 9 is made of thermoplastic resin. A paper-based sealed container covered with a lid 19 with a knob 18 made of synthetic resin, which is removably fixed to the upper end of the opening.