JPS5855173Y2 - lid plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lid plate mainly used for containers for instant foods such as cup noodles.

Instant food such as cup noodles is stored in a package consisting of a molded container 1 whose upper open surface is sealed with a lid plate 2, as shown in Figure 1.When using this, first, as shown in Figure 2. After opening a part of the lid plate 2 and pouring a certain amount of boiling water into the molded container 1, the lid plate 2 is returned to the state before opening and left for 4 to 5 minutes, and then the lid plate 2 is fully opened. It is used for human consumption.

However, the lid plate 2 that is currently in general use is designed to flatten the knob protrusion shown by reference numeral 3 in the drawings and then be peeled off. ,
Due to the adhesive strength between the lid plate 2 and the molded container 1, the peeling angle is about 150°, and the inner surface of the unsealed portion of the lid plate 2 is stretched by peeling, and the outer surface is compressed and curls occur in the peeling direction.

As a result, it is impossible to return the lid plate 2 to the state before opening after pouring boiling water, and to prevent this, aluminum foil is currently used in addition to coated paper, polyethylene film, etc., which are the materials for the lid plate 2. The curl is corrected by utilizing its dead hold property, and the knob protrusion 3 is bent and fixed to the upper edge of the molded container 1 as shown in FIG. 3 to prevent it from being opened naturally due to curling. It looks like this.

However, with the currently used aluminum foil of about 15 to 20μ, it is almost impossible to correct curls or fix it with the knob protrusion 3, and it is not possible to prevent natural opening due to curling, and it is impossible to prevent curling. Currently, it is impossible to use thick aluminum foil due to the cost of the cover plate 2.

Here, the present invention provides a novel lid plate that does not cause the curling phenomenon seen in the conventional example, and the present invention will be specifically explained below with reference to illustrated embodiments.

FIG. 4 is an explanatory cross-sectional view showing the structure of the lid plate 4 according to the present invention, which is made of two layers of materials 5 and 6. The parts are bonded and integrated with adhesive 7.

Using the lid plate 4 of the present invention configured as described above, the second
When the materials 5 and 6 are separated as shown in the figure, most of the material 5 and material 6 are in a free state without being bonded, so the stress strain applied to the material 5 is extremely small, and curling is less likely to occur.
Further, internal distortion due to peeling occurs mainly only in the material 6, and only the curling phenomenon due to elongation occurs in the material 6, which is the same as in the past, and the effect of internal distortion on the cover plate 4 as a whole is extremely small.

Therefore, even after pouring hot water, it is easily restored to the state shown in FIG.

Further, the bonding portion 8 between the materials 5 and 6 may be bonded over the entire circumference as shown by the shaded area in FIG. 5, or may be partially bonded as shown by the shaded area in FIG. 6.

The materials for the lid plates 5 and 6 are not particularly limited, but coated paper or the like, which tends to curl due to stress strain, is mainly used for the outer surface material 5, and synthetic material is used for the inner material 6. It goes without saying that using a resin film or the like is more effective.

The present inventor used 88 g/m2 double-sided coated paper as the material 5, 60μ biaxially oriented polypropylene as the material 6, and ethylene-vinyl acetate emulsion as the adhesive 7. A container was prepared using the lid plate 4 adhered to the entire circumference under the same conditions as conventionally sold cup ramen noodles, and the container was peeled off, but almost no curling was observed.

Also, coated paper, synthetic paper, etc. were used as material 5, but similar results were observed.

That is, according to the present invention, the operations shown in FIGS. 1 to 3 can be performed under far better conditions than in the conventional example, even without using aluminum foil or the like as in the conventional example.

It goes without saying that the lid plate 4 according to the present invention is not limited to the circular cup noodle container described in the embodiment.

[Brief explanation of drawings]

1 to 3 are perspective views illustrating one embodiment of the lid plate according to the present invention using a conventional example, FIG. 5,
FIG. 6 is an explanatory plan view showing the usage state of the lid plate according to the present invention. 1... Molded container, 2... Lid plate, 3...
...Knob protrusion, 4...Lid plate, 5,6.
...Material, 7...Adhesive, 8...
・Adhesive part.

Claims (1)

[Scope of utility model registration request] In the lid plate that is adhesively sealed to the edge of the container opening, the material 5 is
A lid plate characterized in that a material 6 and a material 6 are integrally bonded to each other at the entire circumference or at a plurality of points along the peripheral edge thereof using an adhesive 7.