JPS5834344B2 - sealed container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed container, and is particularly suitable as a package that can be filled and sealed with powder, fluid food or drink materials, and can easily have an opening for taking out the filling when in use. It is something.

BACKGROUND ART Conventionally, a sealed package in which a lid material coated with a heat-sensitive adhesive is adhered to the opening of a container body filled with contents by heat sealing has been used as an individual package for food and drink products.

To take out the contents in this package, just pinch and pull the edge of the lid material on the opening edge of the container body.The adhesive strength of the lid material to the container body is weak, so it can be easily peeled off to form an opening. Although there are advantages, there are disadvantages in that the seal portion may peel off due to impact during handling or transportation of the package, causing the contents to flow out, and it is not possible to form an opening in a predetermined shape.

In addition, there are also containers in which the lid material is tightly sealed to the container body and an opening is provided in the lid material.

In this case, the lid material is an aluminum layer on the outside and a polyethylene layer on the inside, and a notch is provided at the position where the opening is formed in the aluminum layer, and a peel-off tab made of an aluminum sheet is placed on top of the notch so that one end can be pinched. By pulling the peel-off tab, the lid material can be cut from the notched area to form a hole in the lid.

However, this lid material requires the use of an aluminum layer, and since a cut in the aluminum layer is formed in the hole, there is a risk of cutting the lips when drinking a beverage directly.

In addition, when a printed pattern is applied to provide a peel-off tab, the appearance is poor and manufacturing is complicated, resulting in high cost.

The present invention eliminates the drawbacks of the above-mentioned sealed container for use as a packaging body, allows a part of the lid material to be easily peeled off to form an opening, and provides a strong seal between the container body and the lid material. The purpose is to provide an inexpensive sealed container, the gist of which is that a synthetic resin layer that can be heat-sealed to the brim of the opening of the container body is provided on one side of the lid base material, which is made of a film oriented in one direction and easily torn. The laminated lid material is heat-sealed to the opening of the container body, and the lid material has a presser piece that protrudes in the orientation direction of the lid base material, and a tongue piece that penetrates inside the pressed flower piece. The present invention resides in a sealed container characterized by being provided with a protruding piece formed with a cut.

Next, the sealed container of the present invention will be explained with reference to the drawings. FIG. 1 is a sectional view showing an example of the sealed container of the present invention.
FIG. 2 is a plan view showing a reference example, in which 1 is the container body, 2
is the lid material.

The container body 1 is a pot-shaped container, and the outer layer 11 is made of paperboard, and the inner surface is coated with a heat-fusible film such as polyethylene, ethylene-vinyl acetate copolymer, ionomer resin, polypropylene, etc., or a laminated film of these films. A molded, water-resistant inner layer 12 is adhered thereto.

The opening edge of this container body 1 is bent outward to form a flange 13.

In addition, the lid material 2 has a synthetic resin layer 22 that can be heat-sealed to the flange 3 of the container body 1 laminated on one surface of a lid base material 21 made of a film oriented in one direction so as to be easily torn. .

The lid base material 21 is a film made of polyethylene, polypropylene, polyethylene terephthalate, polyamide, or the like, oriented in one direction by rolling or -axial stretching, and the synthetic resin layer 22 is the inner layer of the container body 1. Any material can be used as long as it can be thermally fused to the inner layer 12, and preferably the same type of resin layer as the inner layer 12.

For example, the lid material 2 is made by rolling a laminated film of a high-density polyethylene film as the lid base material 21 and a low-density polyethylene film as the synthetic resin layer to the original thickness of 11 mm using a rolling roll.
It can be easily produced by rolling a synthetic resin layer to about 5 to 1/6, extrusion laminating or dry laminating a synthetic resin layer on the lid base material 21 obtained by a rolling method or a -axial stretching method, or solution coating.

A surface material layer 23 may be provided on the outer surface of the lid base material 21.

The purpose of the surface material layer 23 is to impart printability to the lid base material 21;
It is provided for the purpose of maintaining the strength in the direction perpendicular to the orientation direction of the lid base material 21 and for the purpose of providing gas barrier properties. For example, aluminum foil, cellophane, paper, plastic film, etc. can be used. is glued to.

The lid material 2 is placed over the flange 13 of the opening of the container body 1 so that the synthetic resin layer 22 is in contact with the flange 13, and is heat-sealed to the flange 13 for sealing.

The container body 1 is filled with contents A.

The lid member 2 is provided with a protruding piece 24 that protrudes from the outer periphery of the collar 13 of the container body 1 and a presser piece 25 that protrudes outward from the protruding piece 24.

The protruding piece 24 and the presser piece 25 are provided to protrude in the orientation direction of the lid base material 21, and the protruding piece 24 is formed with a tongue-like cut 26 penetrating the inner side of the presser piece 25.

In addition, the synthetic resin layer 22 of the lid 2 has a length slightly wider than the width of the protruding piece 24 at a position corresponding to the protruding piece 24 along the inner side of the heat-sealed part 3 with the flange 13 of the container body 1. It is preferable that a slit 27 is provided.

This cut 2γ is preferably formed by cutting the synthetic resin layer 22, but even if it is connected to some extent,
It may be provided by slightly cutting into the lid base material 21.

In order to make the lid material 2, a laminated film consisting of a lid base material 21, a synthetic resin layer 22, and a surface material layer 23 is made, and a predetermined shape having a presser piece 25 is punched out from this laminated film, and a penetrating cut 26 is made. The protruding piece 24 is formed by inserting the protruding piece 24, and the cut 27 is further provided.
To take out the container, press the holding piece 25 by bending it toward the container body 1, pinch the protruding piece 24 of the lid 2, and pull it in the direction along the lid 2 as shown in FIG.

By pressing the presser piece 25, the peeling force is concentrated only on the width of the protruding piece 24, so that the lid material 2 is torn from the end of the cut 26 and the container body 1 is torn as shown in FIG. 4 or 5.
The opening 4 corresponding to the width of the protruding piece 24 is formed in the lid member 2 by peeling off at the flange 13.

The example shown in FIG. 4 shows the lid base material 21 of the lid material 2 and the synthetic resin layer 2.
The adhesive strength between the synthetic resin layer 22 and the flange 13 of the container body 1
This is a state in which the synthetic resin layer 22 is broken before and after the heat-sealed part 3 with the flange 13, and the heat-sealed part 3 is weaker than the adhesive strength with the lid base material and the cohesive force of the synthetic resin layer 22. 21 and remains on the collar 13.

Since the synthetic resin layer 22 is easily broken at the end of the heat-sealed part 3, it is torn as shown in the figure even without the cut 2γ to form the opening 4.
However, the lid base material 21 and the synthetic resin layer 2
Depending on the adhesive strength with 2, the lid base material 21 and the synthetic resin layer 22
In order to ensure the formation of the opening 4, it is preferable that the cut 2γ be provided, since the opening 4 may not be formed due to peeling between the opening 4 and the opening 4.

If the cut 27 is provided, the synthetic resin layer 2 will be formed at this cut 2γ.
2 is broken, the synthetic resin layer 22 is torn together with the lid base material 21.

In addition, in the case of the lid material 2 in which the synthetic resin layer 22 is formed together with the lid base material 21 by a rolling method, the synthetic resin layer 22 is torn along the orientation direction of the lid base material 21, but in the case of an unoriented layer, the lid material 2 is torn. Base material 21
When the synthetic resin layer 22 is torn, fluff-like whiskers may occur, so in order to eliminate this sink mark, it is preferable to provide a cut 28 similar to the cut 27 at the position where the synthetic resin layer 22 is torn.

In addition, in order to form the opening 4 in this way, the lid base material 21
has a tensile strength of 2,000% or more, a thickness of 0.02 mm or more, preferably 0.04 to 0.05 mm, and the synthetic resin layer 2
2 has a cohesive force of 1.0 to 1. sKy/α, thickness 0.02
~0.03mm, and the lid base material 21 and the synthetic resin layer 2
The adhesive strength between the synthetic resin layer 22 and the flange 13 of the container body 1 is 0.3 to 0.5/crrL1. O
It is preferable that K, r/cm or more.

This allows the lid material 2 to be firmly adhered to the flange 13 of the container body 1,
Moreover, the opening 4 can be formed easily.

The example shown in FIG. 5 is a case where a hot-melt adhesive with weak cohesive force is used for the synthetic resin layer 22', and by pulling the protrusion 24, the synthetic resin layer 22'
' is delaminated and the cohesive force is weak, so the lid material 2' is torn and the opening 4 is formed even without the cuts 2γ and the cuts 28.

In this case, the thickness of the synthetic resin layer 22' is 0.03 to 0.0.
04mm is appropriate.

In the present invention, the container body 1 may have an inner surface that can be bonded to the synthetic resin layer 22 or 22' of the lid 2.

For example, if the cover material 2' has a hot-melt adhesive layer such as the synthetic resin layer 22', it may be made by vacuum forming a heat-fusible synthetic resin sheet, or it may be made of aluminum or glass. However, in the case of a sealed container for a disposable package, considering the ease of disposal by incineration, the outer layer 11 made of paperboard and the inner layer 12 made of heat-fusible material as shown in the embodiment may be used. Preferably, it consists of

The hermetically sealed container of the present invention is constructed as described above, with a lid base made of a film oriented in one direction and easily torn, and a synthetic resin that can be heat-sealed to the brim of the opening of the container body. Since it uses laminated layers, it can be sealed by heat-sealing it to the container body, and since the lid base is oriented in one direction and is easily torn, the opening can be formed by tearing the lid material. can do.

Furthermore, since the lid material is provided with a protruding piece that protrudes in the orientation direction of the lid base material and a presser piece that protrudes outward from the protruding piece, it is possible to press the presser piece toward the container body and pull the protruding piece. is possible,
Since the protruding piece is pulled while holding both sides, the force for tearing off the cover material acts only on the width of the protruding piece, and the cover material can be easily torn off by a width corresponding to the width of the protruding piece. It has become.

There is no danger that the opening formed in this way can be used as a drinking spout.

In addition, the lid material is simple and inexpensive to manufacture because it is only necessary to cut the laminated film and make cuts as necessary.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a sealed container of the present invention,
FIG. 2 is a plan view showing a reference example, FIG. 3 is a perspective view showing an example of a state in which an opening is formed in the lid material, and FIGS.
The figures are partially cutaway views showing different states of separation of the lid material from the container body. 1... Container body, 11... Outer layer, 12
...Inner layer, 13...Tsuba, 2...
・Lid material, 21...Lid base material, 22...Synthetic resin layer, 23...Surface material layer, 24...
・Protrusion piece, 25... Presser piece, 26, 27...
... Cut, 3 ... Heat-sealed part, 4 ... Opening, A ... Contents.

Claims (1)

[Claims] 1. A lid material made of a film oriented in one direction that is easy to tear, and a synthetic resin layer that can be heat-sealed to the brim of the opening of the container body is laminated on one side of the lid base material, which is heat-sealed to the opening of the container body. The lid material is provided with a presser piece that protrudes in the orientation direction of the lid base material, and a projecting piece that is formed by making a tongue-like cut through the inside of the presser piece. A sealed container O