JPH0771983B2 - Packaging container lid - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lid for a packaging container that accommodates foods and the like and that can be particularly cooked by heating.

[Conventional technology and its problems]

BACKGROUND ART Conventionally, there is an instant food product in which curry, stew, etc. are filled in a plastic container body and a lid is adhered to the container body by heat sealing to hermetically package.

However, when the contents such as curry and stew are heated with hot water or a microwave oven, it may burst due to an increase in internal pressure.Therefore, it is necessary to completely remove the lid from the container body and then cook it. There was a bad problem.

Further, if the lid is firmly heat-sealed to the container body, there is a problem that it takes much time to completely peel off the lid.

Therefore, an object of the present invention is to solve the above problems, to prevent the container from bursting due to an increase in internal pressure of the container due to overheating during cooking, and which is easy to completely open after cooking. Is to provide.

[Means for achieving the purpose]

To achieve the above object, the present invention comprises a laminated material of a heat-sealing layer and a base material, and in a lid having a tab, a tab-shaped cut penetrating the lid material is provided so as not to extend over the heat-sealed portion. It is provided inside the tab.

[Action]

Since the lid has tab-shaped cuts that penetrate the laminated material so as not to exceed the heat-sealed portion, by pinching the tab-shaped cuts to start opening, a narrow fan-shaped opening is formed. Is formed.

When cooking in a microwave oven or the like, if heated more than necessary, there is a risk of container rupture due to an increase in internal pressure due to evaporation of water in the contents, but in the container using the lid of the present invention, there is almost a fan-shaped opening. Since it is formed, the evaporated water and the like are released from the opening to the outside of the container, and it is safe because it does not burst.

Furthermore, in the case of completely opening, since there is a fan-shaped opening inside the tab, the peeling start point becomes two points that cross the heat-sealing portion, and the peeling width becomes narrower, so that it can be easily opened. .

〔Example〕

As shown in FIG. 1, the lid 1 is made of a laminated material in which a heat-sealing layer 3 is provided on the outer surface of a base material 2.

The base material 2 is composed of a metal foil such as aluminum, paper, polyester, nylon (trade name), polypropylene, or a synthetic resin film such as a polyolefin resin, or a composite thereof.

As the heat-sealing layer 3, a simple substance or a composite of polyolefin, ethylene-vinyl acetate copolymer, ionomer, vinyl chloride-vinyl acetate copolymer, acrylic resin, methacrylic resin, polyester resin or the like is used.
It is preferable to select a resin that can be easily opened according to the material of the container body.

As shown in FIG. 2, the lid 1 is provided with a tab-shaped cut 5 at a position inside the tab 4. This cut 5
Penetrates through the laminated material. In addition, 6 in the figure is a heat sealing part.

In FIG. 2, the cut 5 has a semicircular shape, but the shape is not limited to this, and the cut 5 is not limited to this.
The shape shown in FIG. 3 may be used, and it does not matter if it reaches the heat-sealing portion 6 as shown in FIG. 3 (d), but it should not extend beyond the heat-sealing portion 6 and reach the opening 15 of the container body. .
Because not only the barrier property of the container is impaired,
This is because there is a risk of dust, sterilization, and leakage of contents. There is no problem even if there are a plurality of cuts 5. Instead of providing the lid 1 in advance, the cut 5 may be provided after the lid is heat-sealed to the container body. Further, the position of the cut line 5 is not limited to the inside of the tab 4 and may be any place as long as it is outside the heat sealing part 6 (may reach the heat sealing part 6 as described above).

Next, regarding the size of the cut 5, it is determined by the relationship between the distance A between both ends of the cut 5 shown in FIG. 4 and the distance B from the end of the cut 5 to the inner edge of the heat sealing portion 6. Now, if the width C of the opening 7 formed by the cuts 5 is constant, it is necessary to increase A as B increases, and conversely, if B decreases, A also needs to decrease.

FIG. 5 shows a state in which the container body is sealed by the lid 1 as described above.

As illustrated, the container body 10 has a bottom wall 11 and a peripheral wall 12 continuous with the bottom wall 11, and a flange 13 is provided on the peripheral edge of the opening 15. The container body 10 may be made of glass, ceramics, synthetic resin, paper, or any other single or composite material as long as the upper surface of the flange 13 can be heat-sealed. Also, the shape may be any of a round shape and a square shape.

Place the lid 1 on the flange 13 of the container body 10
The container is completed by heat sealing. Of course the contents are the main body 10
It is enclosed inside.

In order to use the container of FIG. 5 for cooking, as shown in FIG. 6, first, the tab-shaped cut 5 of the lid 1 is pinched and peeled in the opening direction to form a substantially fan-shaped opening 7. So you can put this container in a microwave oven or pan to cook. Since the lid 1 has a substantially fan-shaped opening, it is possible to prevent the lid 1 from bursting due to an increase in internal pressure during cooking. After cooking, if the tab 4 of the lid 1 is pinched and peeled in the opening direction, When the heat-sealing part is reached, since the space is formed by the fan-shaped opening in that part, the heat-sealing part can be easily opened and the contents can be easily taken out.

〔effect〕

According to the present invention, as described above, the lid formed of the laminated material of the base material and the heat-sealing layer is provided with the tab-shaped cuts penetrating the lid so as not to reach the container opening beyond the heat-sealing portion. Therefore, there is no possibility that the barrier property will be hindered by this cut, the deterioration of the contents can be effectively prevented, and the break does not occur from the cut due to an impact during handling. Furthermore, by pinching and tearing the cut, it is possible to easily form a substantially fan-shaped opening, and it is possible to prevent rupture due to an increase in internal pressure when cooking with a microwave oven, etc., and easily after cooking. Since the lid can be opened and removed, the contents can be easily taken out. Furthermore, since the size of the substantially fan-shaped opening can be controlled to some extent, for example,
It is also possible to use a method in which a hygroscopic powder such as "soup stock" is filled and water is poured from the opening at the time of use to heat and cook.

That is, since the packaging container of the present invention can be used consistently from distribution to storage to cooking, it is very convenient to handle and saves labor, and at the same time, has an effect of saving resources.

[Brief description of drawings]

1 is a sectional view of the lid, FIG. 2 is a plan view of the same as above, FIG. 3 is a plan view showing the shape of the tab-like cut, and FIG. 4 is a plan view showing the relationship between the tab-like cut and the opening. The figure shows a cross-sectional view of the container, No. 6.
The figure is a perspective view showing a state in which the above-mentioned opening is formed. 1 ... Lid, 2 ... Substrate, 3 ... Heat-sealing layer, 4 ... Tab,
5 ... Tab-shaped notch, 6 ... Heat seal part, 7 ... Opening, 10 ...
… Container body, 13 …… flange, 15 …… opening.

Continuation of the front page (56) References 62-125766 (JP, U) 59-46868 (JP, U) 59-46868 (JP, U) 4-7957 (JP, Y2)

Claims (1)

[Claims] 1. A lid formed from a laminated material of a heat-sealing layer and a base material, wherein tab-shaped cuts penetrating the laminated material are provided outside the heat-sealed portion so as not to exceed the heat-sealed portion of the lid. A lid for a packaging container, which is characterized in that