JP3654488B2 - Packaging container for microwave oven heating - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a microwave heating packaging container that contains food such as curry roux that is heated using a microwave oven.
[0002]
[Problems to be solved by the invention]
Conventionally, among foods that can be heated and eaten with a microwave oven, in foods that are fluid, such as roux containing curry, those that are put in a packaging container made of a flexible sheet Yes, as shown in FIG. 5 , in the commodity using the microwave heating packaging container 1, for example, the storage formed by heat-sealing the periphery of two sheets 2 made of synthetic resin material having a laminated structure The space 3 is filled with food and sealed, and the packaging container 1 having a flat shape is placed in an outer box 4. And, when heating by microwave irradiation by a microwave oven, the microwave is put on the turntable in a state where the packaging container is stood rather than being placed on the turntable in the microwave oven, and receives microwaves. For example, Japanese Patent Application Laid-Open No. Hei 4-214126 has the advantage that the heating efficiency is better, and if a part is opened and stood, heating can be performed without transferring to a dedicated container for microwave cooking. In addition, as shown in FIG. 6 , an attempt is made to use the outer box 4 to allow the packaging container 1 to stand in a microwave oven.
[0003]
By the way, when food that can be cooked in a microwave oven is provided as a product, the food is put in a packaging container as described above, and steam generated from the food during cooking is packaged. As one of the ideas for allowing the container to escape to the outside, as shown in Japanese Utility Model Laid-Open No. 62-1015166, the side seal portion of the packaging container is provided with a notch, and the contents by heating the microwave oven Due to the generation of steam from (food), the packaging container swells and the notch is provided to open the narrow seal part, or a plurality of holes are opened in the packaging container bottom in advance. A configuration for releasing steam in the packaging container has been proposed.
However, if the contents to be stored in the packaging container are fluid food such as liquid, a structure that allows a steam vent hole to be formed in the side seal part or a steam vent hole in the container bottom is provided. I can't leave. For this reason, in the packaging container in which the fluid content is put in a standing state and placed in the microwave oven, a notch that cuts the upper seal part of the container is inserted before heating. Yes. Specifically, a cut 5 is made vertically or horizontally in the upper corner of the container so that steam can be vented (note that when the cut 5 is opened, the upper corner of the container having the opening is opened. The corner of the corresponding outer box is removed), and there is a high possibility that it will be put into a microwave oven without providing the opening for venting the steam. The problem of soiling the inside of the range arises. In FIG. 6, a indicates a cut position indicating line for pouring the contents, and b indicates a cut position indicating line that is cut when the contents are poured when heated with a hot water bath. .
Therefore, in view of the above circumstances, the present invention has a problem in that in a packaging container containing contents that are heated in a state of standing in a microwave oven, the steam is appropriately removed during heating. An object of the present invention is to obtain a microwave heating packaging container that can be easily evacuated.
[0004]
[Means for Solving the Problems]
The present invention has been made in consideration of the above problems, using an external box for housing the packaging containers, in the packaging container is placed in a state placed upright inside the microwave oven, the packaging container is a plurality of sheets A space for storing food for microwave heating is formed by heat-sealing the area around the stack, and a narrow steam release planned part with a notch or unsealed part is provided on the outer edge of the upper seal part. The above-mentioned problem is solved by providing a packaging container for heating a microwave oven, characterized in that the steam venting portion is covered with the outer box .
Moreover, in this invention, it is good to provide the said steam removal plan part in the center of the upper seal part of a packaging container. The notch or the unsealed part is preferably provided in a shape having a width dimension that is twice or more the height dimension, and each of the lower seal part and / or the side seal part is provided. It is preferable that the seal width in the vertical direction at least in the center of the seal portion is larger than the seal width in the vertical direction of the upper seal portion .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
It will be described in detail with reference now to the present invention from Figure 1 in the embodiment shown in FIG. Incidentally, the portion as the conventional example shown in FIG. 5 are duplicated description thereof is omitted with denoted by the same reference numerals.
As shown in FIG. 1, the microwave heating packaging container 1 according to the present invention is provided in a shape in which the width dimension is larger than the height dimension so that it can be easily placed in a state of standing in a microwave oven. In addition, two sheets of the front sheet 2a and the back sheet 2b are overlapped and the periphery is heat-sealed so that the storage space 3 for putting food such as curry roux is placed between the two sheets. Since it is formed in a state surrounded by the seal portion 6, the side seal portions 7, 8 and the lower seal portion 9, the periphery is heat-sealed in this way, so even if it is in the container bottom 10, the front sheet The lower end 2c of 2a and the lower end 2d of the back sheet 2b are closed by heat sealing. In this packaging container 1, since the bottom part is closed and formed by laminating the front sheet 2a and the back sheet 2b as described above, the packaging container 1 itself is not self-supporting. It is erected using the outer box 4 to be stored.
As shown in the drawing, at the center of the upper seal portion 6 of the packaging container 1, a cutout 11 continuous to the outer edge 6 a of the upper seal portion 6 is provided, and the width is narrowed vertically below the cutout 11. The steam release planned portion 12 is provided. As shown in the figure, the steam venting portion 12 includes a substantially trapezoidal notch 11 that opens upward, and the actual seal portion is made narrower. It is provided in a shape in which the width dimension is more than twice the height dimension. For example, the width dimension X on the upper edge side of the notch 11 is preferably 10 mm or more, and the ratio of the width dimension X and the height dimension Y of the notch 11 is X: Y = 1: 2 or more as described above. The height Z of the seal portion 13 below the notch 11 is preferably 5 mm or more. Of course, the vertical width dimension (height dimension) of the upper seal portion 6 is within the normal range (around 8 mm).
[0006]
As described above, the packaging container 1 is provided with the steam venting planned portion 12 including the notch 11 at the center of the upper seal portion 6 located on the upper side when the packaging container 1 is erected. In addition, when the packaging container 1 is heated in a standing state in the microwave oven, the internal pressure is most applied to the center of each of the four seal portions of the packaging container 1, and peeling progresses at the center of each seal portion. It becomes easy.
Since the steam release planned portion 12 is provided at the center of the upper seal portion 6, the steam release scheduled portion 12 can form the opening for steam release earliest, and once this steam release If the opening is formed by the steam release portion 12 and the steam is released to the outside of the container, the other seal portions will not be peeled off, and the steam will properly escape from the upper seal portion 6, and from the liquid level of the contents Since an opening for removing steam is formed on the far upper seal portion 6 side, it is possible to prevent the contents from being blown out.
In addition, since the notch 11 of the steam release planned portion 12 is formed wide (wide with respect to the longitudinal direction of the upper seal portion 6), an opening for steam release is formed in the steam release planned portion 12 due to an increase in internal pressure. The opening becomes wide at an early point when it begins to form. In this regard, as shown in FIG. 2 (a), the shape of the notch 11 in the steam venting planned portion 12 may be V-shaped, but in that case, at the initial point when the opening for steam venting starts to be formed. The opening width is small, and there is a possibility that a high steam removal effect cannot be obtained at the initial stage. Furthermore, when the internal pressure rises, the phenomenon of bending at the notch occurs, so if the opening is small as described above, the opening may be closed by this bending, and the notch should be trapezoidal. It is. Further, the shape of the notch 11 may be an arc as shown in FIG.
[0007]
In the packaging container 1, as shown in the drawing, the thick seal part 14 is provided such that the seal width in the vertical direction at least in the central part of the lower seal part 9 is larger than the seal width in the vertical direction of the upper seal part 6. It is preferable that the seal width of the lower seal portion 9 is further larger by about 3 to 5 mm than the seal width of the upper seal portion 6. As shown in FIG. 1, it is not always necessary for the thick seal portion 14 to have a stepped shape on both sides. In addition, for example, a trapezoidal shape is used as shown in FIG. Alternatively, the shapes on both sides of the thick seal portion 14 may be loose, or the upper edge of the thick seal portion 14 may be an arc. Thus, since the thick seal part 14 is provided in the center part of the lower seal part 9, the seal strength of that part is increased, so that the steam release planned part 12 can be opened more reliably. The thick seal portion 14 is not limited to the lower seal portion 9 but can be provided at least in the center of the side seal portions 7 and 8, and the seal portion itself can be provided at the upper portion. The seal portion 6 may be wider and thicker.
[0008]
As described above, the packaging container 1 having the above structure is stored in the outer box 4 and placed in a standing state in the microwave oven, and the steam venting planned portion 12 is covered by the outer box 4. (See FIG. 1). As a result, even if a portion of the contents may jump out of the opening for steam removal when the steam removal planned portion 12 is opened by heating with a microwave oven and an opening for steam removal is formed, The box 4 reliably prevents the contents from being scattered and does not contaminate the inside of the microwave oven. Furthermore, it is possible to reliably prevent the outer box 4 from falling due to the force of the steam blown out from the opening for removing the steam.
[0009]
Et al is, in the above embodiments, the vapor release schedule section 12, but is obtained by reducing the vertical width of the sealing portion of the lower by providing a notch 11, the notches as shown in FIG. 4 Instead, a continuous unsealed portion 16 may be provided on the upper edge of the upper seal portion 6 to reduce the vertical width of the seal portion 13 below the unsealed portion 16.
[0010]
As a material of the front sheet, the back sheet, and the bottom sheet of the packaging container 1, a synthetic resin laminated sheet having the following laminated structure can be adopted, but is not limited thereto.
(1) (Outside) Vapor-deposited polyethylene terephthalate film / nylon resin / unstretched polypropylene film (The vapor-deposited polyethylene terephthalate film is a polyethylene terephthalate film on which an inorganic compound such as alumina or silicon oxide is deposited.)
(2) (outside) polyethylene terephthalate film / nylon resin / unstretched polypropylene film (3) (outside) nylon resin / unstretched polypropylene film (4) (outside) uniaxially stretched nylon film / polyvinylidene chloride resin / unstretched polypropylene film (5) (Outside) Uniaxially stretched nylon film / ethylene vinyl alcohol copolymer / unstretched polypropylene film In the laminated sheet, it is possible to use a heat resistant polyethylene film as the innermost thermoplastic resin.
[0011]
【The invention's effect】
As described above, the packaging container of the present invention is formed by stacking a plurality of sheets and heat-sealing the periphery to form a storage space for storing food for microwave heating, and is continuous with the outer edge of the upper seal portion. A narrow steam release part with a notch or an unsealed part is provided, and the steam release part is covered with the outer box, so that the internal pressure of the container rises when heated by a microwave oven. Forgetting the operation to cut the steam vent by making the steam vent part peel off and the steam vent opening is positively obtained, and the steam escapes from the steam vent opening. Even if the packaging container is heated in a microwave oven, it does not cause rupture, it can be heated safely, and since the steam venting is started early, the contents are vigorously removed from the container. To blow Also prevented from leaving, and does not soil the inside compartment of a microwave oven, in which excellent effects in practical use.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of implementation of a packaging container according to the present invention.
FIG. 2 is an explanatory view showing a modified example of the steam removal scheduled portion.
FIG. 3 is an explanatory view showing another example of the width-thickness seal portion in the lower seal portion.
FIG. 4 is an explanatory diagram showing a steam removal scheduled portion provided with an unsealed portion in an upper seal portion .
FIG. 5 is an explanatory diagram showing a conventional example.
FIG. 6 is an explanatory view showing an outer box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Microwave heating packaging container 2 ... Sheet | seat 3 ... Storage space 4 ... Outer box 6 ... Upper seal part 7, 8 ... Side part seal part 9 ... Lower seal part 11 ... Notch 12 ... Steam extraction planned part 14 ... Thickness Width seal part 16 ... unsealed part

Claims (4)

Using an external box for housing the packaging containers, in the packaging container is placed in a state placed upright inside the microwave oven,
The packaging container is formed by stacking a plurality of sheets and heat-sealing the periphery to form a storage space for storing food for heating a microwave oven, and has a width provided with a notch or an unsealed portion continuous to the outer edge of the upper seal portion A microwave heating packaging container, characterized in that a narrow steam venting portion is provided and the steam venting portion is covered by the outer box . The packaging container for heating a microwave oven according to claim 1, wherein the steam release planned part is provided at the center of the upper seal part of the packaging container. The packaging container for heating a microwave oven according to claim 1 or 2, wherein the notch or the unsealed portion is provided in a shape in which a width dimension is twice or more with respect to a height dimension. Vertical sealing width of at least the central portion of the seal portion of the lower seal part and / or side-sealed portion, wherein the vertical seal width is greater than a first aspect of the upper seal portion to any one of 3 Packaging container for microwave oven heating.

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