JPS63110175A - Cover for vessel for packaging - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a lid for a packaging container that stores food and the like, and in particular can be heated and cooked.

C. Prior art and its problems] Conventionally, there are instant foods in which curry, stew, etc. are filled into a plastic container body, and a lid is adhered to the container body by heat sealing to seal the container.

However, when heating the contents of curry, stew, etc. with boiling water or a microwave oven, the internal pressure may rise and cause the contents to burst, so it is necessary to completely remove the lid from the container body before cooking, which reduces heating efficiency. There was a bad problem.

Furthermore, if the lid is tightly heat-sealed to the container body, there is a problem in that it takes a lot of effort to completely peel off the lid.

Therefore, the purpose of this invention is to solve the above-mentioned problems, to provide a packaging container that can prevent the container from bursting due to an increase in internal pressure due to overheating during cooking, and that can be easily opened completely after cooking. The goal is to provide the following.

[Means for achieving the purpose]

In order to achieve the above object, the present invention provides a lid that is made of a laminated material of a heat sealing layer and a base material and has a tab, in which a tab-shaped cut that passes through the lid is made so as not to go beyond the heat sealing part. It is provided inside the tab.

[Effect]

The lid has a tab-shaped cut that passes through the laminated material so as not to go beyond the heat-sealed part, so by pinching the tab-shaped cut and opening the lid, a narrow, almost fan-shaped opening is created. is formed.

When cooking in a microwave oven, etc., if the food is heated more than necessary, there is a risk of the container bursting due to an increase in internal pressure due to moisture in the contents, but containers using the lid of this invention have an almost fan-shaped opening. As a result, the released moisture is released from the opening to the outside of the container, and it is safe without causing any rupture.

Furthermore, when opening completely, there is a fan-shaped opening on the inside of the tab, so the peeling starting points are two points across the heat-sealed area, making the opening narrower, making it easier to open. .

〔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 made of a metal foil such as aluminum, paper, polyester, nylon (trade name), polypropylene, a synthetic resin film such as polyolefin resin, or a composite thereof.

Further, as the heat sealing layer 3, single substances or composites of polyolefin, ethylene-vinyl acetate copolymer, ionomer, vinyl chloride-vinyl acetate copolymer, acrylic resin, methacrylic resin, polyester resin, etc. are used.

It is preferable to select a resin that can be easily opened depending on 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. As shown in FIG. This cut 5
penetrates the laminate. In addition, 6 in the figure is a heat sealing part.

In Figure 2, the cut 5 has a semicircular shape, but it is not limited to this, and as shown in Figures 3 (A), (B), and (C).
It may have a shape like this, or it may reach the heat sealing part 6 as shown in Figure 3), but it should not extend beyond the heat sealing part 6 and reach the opening 15 of the container body.
This is because not only the barrier properties of the container are impaired, but also
This is because there are risks such as intrusion of dirt and sterilizers and leakage of contents. It should be noted that there is no problem even if there is a plurality of cuts 5. In addition, the cuts 5 may be provided after the lid is heat-sealed to the container body instead of being provided on the lid 1 in advance. The position is not limited to the inside of the tab 4, but as long as it is outside the heat sealing part 6 (as mentioned above, it may reach the heat sealing part 6).
Anywhere is fine.

Next, the size of the cut 5 is determined by the relationship between the distance MA 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-sealed part 6. Now, if the width C of the open lower portion formed by the cut 5 is constant, the larger B becomes, the larger A needs to be, and conversely, if B becomes smaller, A also needs to be smaller.

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

As illustrated, the container body 10 has a bottom wall 11 and a peripheral wall 12 continuous thereto, and a flange 13 is provided at the periphery of the opening 15. The material of the container body 10 may be either a single material or a composite material such as glass, ceramics, synthetic resin, or paper, as long as the upper surface of the flange 13 can be heat-sealed, and the shape may be round, square, etc. But that's fine.

The lid 1 is placed on the flange 13 of the container body 10 and heat sealed to complete the container. Of course, the contents are sealed inside the main body 10.

To use the container shown in Fig. 5 for cooking, as shown in Fig. 6, first pinch the tab-shaped cut 5 of the lid 1 and pull the lid 1 in the opening direction to form a substantially fan-shaped opening lower. Ru. So all you have to do is put this container in the microwave or a pot and cook it.
Since the lid 1 has a substantially fan-shaped opening, it is possible to prevent the lid from bursting due to the increase in internal pressure during cooking. When the bag is reached, it can be easily opened and the contents can be easily taken out because there is a space between the parts due to the fan-shaped opening.

〔effect〕

According to this invention, as described above, a tab-shaped cut is provided in the lid made of a laminated material of a base material and a heat-sealing layer so as not to reach the opening of the container beyond the heat-sealing part. Therefore, there is no risk that the barrier properties will be impaired by this cut, and deterioration of the contents can be effectively prevented.Furthermore, the cut will not cause breakage due to impact etc. during handling. By pinching and tearing, a roughly fan-shaped opening can be easily formed, preventing bursting due to increased internal pressure when cooking in a microwave oven, etc., and the lid can be easily opened and removed after cooking. This makes it easy to take out the contents. Furthermore, since the size of the approximately fan-shaped opening can be controlled to a certain extent, for example, it is possible to fill it with a hygroscopic powder such as "soup base" and then pour water through the opening during use to heat and cook the food. Usage is also possible.

That is, the packaging container of the present invention can be used throughout the process, from distribution to storage to cooking, so it is very convenient and time-saving to handle, and at the same time it is effective in saving resources. .

[Brief explanation of the drawing]

Fig. 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-shaped cut, Fig. 4 is a plan view showing the relationship between the tab-shaped cut and the opening, and Fig. 5 is a plan view showing the shape of the tab-shaped cut. The figure is a cross-sectional view of the container, No. 6
The figure is a perspective view showing a state in which the opening same as above is formed. 1...Lid, 2...Base material, 3...
- Heat sealing layer, 4... tab, 5... tab-shaped cut, 6... heat sealing part, 7... opening, 10... ... Container body, 13 ... Flange, 15 ... Opening. Patent applicant: Toyo Aluminum Co., Ltd. Agent
Sickle 1) Letter 2 Figure 3 (a)
(0) (c)
(d) Figure 4 Figure 6

Claims (1)

[Claims] A lid formed from a laminated material of a heat-sealing layer and a base material, characterized in that a tab-shaped cut that penetrates the laminated material is provided on the outside of the heat-sealed part so as not to go beyond the heat-sealed part of the lid. A lid for a packaging container.