JP2011115259A - Container for microwave oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for a microwave oven, capable of heating liquid-like food like a raw egg before being heated, being the food which explodes when heated in the microwave oven, without making it explode in the microwave oven, and capable of browning it. <P>SOLUTION: The container for a microwave oven includes: a container body composed of a microwave oven heating sheet and provided with a bottom part and a sidewall part; and a lid provided with a through-hole on the center part and a sticking rod which freely detachably closes the through-hole and reaches the inside of the container body, to be put on the container body. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a container for a microwave oven using a microwave heating sheet that generates heat by microwaves.

  In recent years, various types of microwave oven heating sheets have been used. For example, a popcorn raw material is put in a cup-shaped packaging container and sold, and a consumer uses a microwave oven at home to expand the corn to make popcorn (Patent Document 1). In addition, when food such as half-cooked grilled rice balls, okonomiyaki, and pizza is reheated with a microwave oven, the surface is used to obtain a crispy texture (Patent Document 2).

  There are various types of microwave heating sheets, but one of them is a microwave heating sheet in which aluminum is thinly vapor-deposited on a polyethylene terephthalate film, and the vapor deposition surface is bonded to paper via an adhesive. It has been. Moreover, the container provided with the bottom face and the side wall using this microwave oven heat generating sheet | seat is known, and it is also known to cover this (patent document 3).

  On the other hand, it is widely known that if an egg is heated in a microwave oven, it bursts. In order to make a boiled egg in a microwave oven, a material that does not transmit microwaves, such as aluminum foil, is used so that microwaves are not directly applied. It is known that the egg is indirectly heated by wrapping, submerging in water and heating the water. It is also known that raw eggs that break out of the shell burst in the same way.

  Known documents are shown below.

Japanese Utility Model Publication No. 7-44733 JP 2008-289692 A Japanese Patent Publication No. 60-15548

  When food is put on a microwave oven, molecules such as water in the food are vibrated by microwaves, and as a result, the food can be heated. However, if you put raw eggs in a microwave oven and try to make a fried egg, the yolk bursts and you cannot cook.

  The present invention is a food product that is liquid like a raw egg before heating, and ruptures when heated in a microwave oven without being ruptured and is baked. For the purpose.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention of claim 1 comprises a microwave oven heat generating sheet, a container body having a bottom portion and a side wall portion, a through hole in the center portion, and the through hole being removable. A container for a microwave oven comprising a lid covering the container main body, which is provided with a piercing rod that reaches the inside of the container main body.

  By using the microwave oven container of the present invention, even if the container body is a liquid food such as raw eggs that is ruptured when heated in a microwave oven, The piercing rod that reaches the inside of the container body prevents the food from being punctured and ruptured. Also, after making a hole in the food, by removing the piercing stick, the through hole opens, it becomes a vapor vent hole when heating the microwave oven, it can be prevented that the pressure inside the microwave oven container becomes high, With the lid, heat does not escape and a steaming effect is obtained, and heating can be performed efficiently.

  In addition, because the container body is made of a microwave oven heating sheet, it can burn the bottom of the food and the side of the food in contact with the side wall of the container, and cooks food that has been baked in a frying pan in a short time. be able to.

  A second aspect of the present invention is the microwave oven container according to the first aspect of the present invention, wherein a recess is provided in a central portion of the bottom portion of the container main body.

  By providing the depression at the center of the bottom of the container body, the food gathers at the center, and the food can be reliably pierced by the piercing stick. Especially in the case of raw eggs, the yolk enters this dent, and the piercing stick can surely pierce the yolk.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the lid has a peripheral edge bent downward, and a lower end of the peripheral edge is located below an upper end of the side wall of the container body. Thus, the microwave oven container is covered so as to cover the container body.

  The lid has a peripheral edge bent downward, and the lower end of the peripheral edge covers the container body so as to be positioned below the upper end of the side wall of the container body. Heat and steam inside the container are difficult to escape to the outside, and since heat does not escape, a steaming effect is obtained and heating can be performed efficiently.

  As described above, the container for a microwave oven according to the present invention is a liquid food such as a raw egg that does not burst even when heated in a microwave oven that bursts when heated in a microwave oven. And it can be burnt.

  Furthermore, if the food is a raw egg, a fried egg with the centerpiece in the center can be made by providing a depression at the center of the bottom of the container body.

It is explanatory drawing which showed typically the layer structure of an example of the sheet | seat which generate | occur | produces with the microwave used for the container for microwave ovens of this invention in the cross section. It is the perspective view which showed typically an example of the container main body of the container for microwave ovens of this invention. (A) It is the side view which showed typically an example of the lid | cover of the container for microwave ovens of this invention. (B) It is sectional drawing which showed typically an example of a part of lid | cover of the container for microwave ovens of this invention. It is the side view which showed typically an example of the container for microwave ovens which covered the container main body of this invention with the lid | cover. It is sectional drawing which showed typically an example of the container for microwave ovens which covered the container main body of this invention with the lid | cover.

  Hereinafter, modes for carrying out the present invention will be described.

  FIG. 1 is an explanatory view schematically showing in cross section the layer structure of an example of a microwave heating sheet used in the microwave oven container of the present invention. The microwave oven heating sheet 1 of this example includes a resin film 2, a conductive layer 3, an adhesive layer 4, and a paper layer 5.

  As the resin film 2, a resin film having high heat resistance is used. As the resin having high heat resistance, there are thermosetting resins such as phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester, alkyd resin, polyurethane, thermosetting polyimide, and the like.

  The thermoplastic resin is preferably a heat-resistant resin having a melting point of about 250 ° C. or higher. Examples of the polyester type include resins such as polyethylene naphthalate, polybutylene naphthalate, and polyethylene terephthalate. Examples of the polyamide type include nylon 66. Also, polycarbonate, polysulfone, etc. can be used.

  Of these, polyethylene terephthalate is versatile and easily available. If biaxially stretched polyethylene terephthalate is used, it is particularly suitable because it has relatively good dimensional stability due to heat and a smooth surface.

  A thickness of 6 to 50 μm that is easily available is easy to use. Considering the ease of handling in the vapor deposition process and the bonding process, and the formability into the container and the return after molding after stacking with the paper layer to form a sheet that generates heat by microwaves, balance with the paper layer Can be selected.

  A metal thin film is used as the conductive layer 3. As a method for producing the thin film, it is preferable to laminate the resin film by a vacuum deposition method. Aluminum or stainless steel can be used as the metal, but aluminum is convenient.

  More specifically, using a metal aluminum metal as a vapor deposition source, it is heated and evaporated in a vacuum, and is aggregated on a biaxially stretched polyethylene terephthalate surface to form a thin film. The thickness is preferably 5 to 15 nm. When the microwave oven is heated depending on the thickness, it is influenced by the time to reach a specific temperature. The thickness of the deposited thin film can be controlled by measuring the amount of transmitted light because the aluminum layer is translucent at such a thickness.

In this way, the metal thin film surface of the laminate in which the metal thin film of the conductive layer 3 and the resin film 2 are laminated is laminated on the paper layer 5 through the adhesive layer, and the sheet 1 that generates heat by the microwave is obtained. As the paper layer 5, paper having a basis weight of 10 to 300 g / m ² can be used. As paper types, cardboard, manila balls, cup base paper, and card paper can be used. As the adhesive layer 4, a two-component curable urethane adhesive is used. This lamination can be performed by a dry lamination method.

When the microwave heating sheet 1 thus obtained is irradiated with microwaves, a part of the microwaves is transmitted and a part of the microwaves is changed to an eddy current in the metal thin film layer. When an eddy current flows, Joule heat is generated by the electric resistance of the metal thin film layer, and the metal thin film layer generates heat.

  The microwave heating sheet 1 is molded to obtain a container body. FIG. 2 is a perspective view schematically showing an example of the container body of the microwave oven container of the present invention. The container body 6 includes a bottom portion 7 and a side wall portion 8. The shape of the bottom 7 is circular in FIG. 2, but is not limited thereto. Even if it is an ellipse, it may be an oval or a rectangle with a rounded corner.

  The side wall portion 8 is provided continuously with the bottom portion 7 and is raised from the bottom portion 7. The side wall portion 8 is preferably provided so as to open outward. When the microwave heating sheets 1 are overlapped with each other, the overlapping portion is excessively heated, which is not preferable, but by being provided to open to the outside, the mountain fold portion 9 and the valley fold portion 10 cause the side wall portion 8 to The microwave oven heating sheet 1 does not overlap each other.

  In FIG. 2, the mountain fold portions 9 and the valley fold portions 10 are alternately provided on the side wall portion 8. Two or more mountain folds 9 may be provided continuously, or may be provided more continuously. Similarly, two valley folds 10 may be provided continuously, or more than that may be provided continuously.

  A recess 11 is provided at the center of the bottom 7. The size of the container body 6 is preferably such that the diameter of the upper part of the side wall part is 160 to 250 mm, the diameter of the bottom part 7 is 30 to 150 mm, the diameter of the hollow part 11 is 10 to 120 mm, and the depth is 5 to 20 mm. . As a result, the food enters the center. If the food is raw egg, the yolk enters the dent, and when the lid is capped, the yolk is securely stabbed with the stab stick attached to the through hole of the lid. Can do.

  The container body 6 can be formed by pressing. Molding can be performed by setting male and female molds on the top and bottom and sandwiching and pressing the microwave heating sheet 1 therebetween. It can be manufactured efficiently by intermittently feeding the continuous wound-up microwave heating sheet 1 and forming it with a punching die set in a mold.

  (A) of FIG. 3 is the side view which showed typically an example of the lid | cover of the container for microwave ovens of this invention. FIG. 3B is a cross-sectional view schematically showing an example of a part of the lid of the microwave oven container of the present invention. FIG. 4 is a side view schematically showing an example of a container for a microwave oven in which the container body of the present invention is covered. FIG. 5 is a cross-sectional view schematically showing an example of a microwave oven container in which the container body of the present invention is covered.

  The lid 12 includes a substantially flat central portion 13 and a peripheral edge portion 14 bent downward, and a through hole 15 is provided at or near the center of the lid. The through-hole 15 is pierced with a piercing bar 16 extending from the outside of the lid 12 to the inside of the container body. The piercing bar 16 is thicker outside the through-hole 15 and thinner than the through-hole 15 from the through-hole 15 due to a step or taper so as to stop in the middle of the through-hole 15.

  The peripheral edge portion 14 of the lid 12 is provided continuously with the central portion 13 and is bent and extends downward. The lower end of the peripheral edge part 14 is located below the upper end of the side wall part 8 of the container body 6 so as to cover the container body 6.

As a material of the lid excluding the piercing rod 16, heat resistance may be 100 ° C. or 120 ° C. or more. If it is a resin, it may be a thermoplastic resin such as polyethylene, polypropylene, polystyrene, acrylonitrile / styrene resin, acrylonitrile / butadiene / styrene resin, methacrylic resin, polyamide, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, phenol resin, urea. Thermosetting resins such as resins and melamine resins may be used.

  In addition, paper such as cardboard, manila balls, cup base paper, card paper, or the like, or a laminate in which the above-described resin is bonded to these papers may be used.

  As a method of manufacturing the lid 12 excluding the piercing rod 16, if the material is resin, it can be produced by injection molding. Further, among the resins, a thermoplastic resin can be manufactured by forming a sheet-shaped thermoplastic resin into a lid shape by sheet molding and then punching the through hole 15 after molding.

  If the material is paper or a laminate of paper and resin, it can be manufactured by stamping into a predetermined shape and pressing between a male mold and a female mold and molding. At this time, the mold may be heated and molded.

  The material of the piercing bar 16 can be manufactured by injection molding using a resin that can be used for the material of the lid excluding the piercing bar 16. It can also be made from wood.

  Specific examples will be described below.

<Manufacture of container body>
On one surface of a 12 μm polyethylene terephthalate film, an aluminum thin film serving as a conductive layer was laminated to a thickness of 5 to 15 nm by vacuum deposition using metal aluminum as a deposition source. A cup base paper having a basis weight of 150 g / m ² was bonded to the thin film surface of this laminate using a two-component curable urethane adhesive to obtain a microwave oven heat generating sheet.

  The microwave oven exothermic sheet was punched with a press molding machine, and was molded so that the polyethylene terephthalate film surface was inside the container to obtain a container body. The shape of the container body is a circle with a diameter of 135 mm at the bottom, a concentric diameter at the center, a circular recess with a diameter of 100 mm is provided with a depth of 10 mm, the diameter of the upper end of the side wall is 210 mm, and the height of the body container is 30 mm.

<Manufacture of lid>
Using a sheet-like transparent polyethylene having a thickness of 200 mm, the sheet was formed by a sheet forming method. This molded product is composed of a substantially flat central portion and a peripheral portion bent downward from the central portion, the central portion is a circle having a diameter of 210 mm, and the peripheral portion is 30 mm wide and inclined 45 degrees downward. A circular through hole having a diameter of 2 mm was provided by punching in the center of the center of the molded product.

  The stab stick was manufactured by molding polypropylene by the injection method. This piercing rod has a circular cross section, a diameter of 4 mm at the top, a diameter of 1 mm at the bottom, and an intermediate portion of 20 mm in diameter between the top and bottom. The length from the lower end of the upper part with a diameter of 4 mm to the lower end with a diameter of 1 mm, that is, the length from the upper end of the intermediate part to the lower end is 25 mm.

  Insert this piercing rod into the through hole opened in the previous molding from above, from the lower part of the piercing rod, and insert until the middle part is the position of the through hole and the lower end of the upper part hits the through hole, to make a lid .

<Cooking test>
The egg was broken and dropped into the container body. At this time, the yolk naturally entered the depression, and a white-only part was created around it. When the main body container was covered, the lower end of the piercing stick stuck into the yolk.

  The stab stick was withdrawn from the lid, and the container was placed in a 600 watt microwave oven and irradiated with microwaves for 2 minutes. From the middle, it was observed that the through-hole became a vapor vent hole, and the vapor escaped, and the egg did not burst during irradiation. After the microwave irradiation was finished, the container was taken out and the lid was removed, and the yolk portion was semi-ripe and the underside was light brown. As described above, the egg was not ruptured during microwave irradiation in the microwave oven, and it was not ruptured after being taken out. The yolk was semi-ripe and the underside was crispy.

DESCRIPTION OF SYMBOLS 1 ... Heat generating sheet 2 ... Resin film 3 ... Conductive layer 4 ... Adhesive layer 5 ... Paper layer 6 ... Container main body 7 ... Bottom part 8 ... Side wall part 9 ... · Mountain fold 10 · · · Valley fold 11 · · · hollow 12 · · · lid 13 · · · center 14 · · · peripheral portion 15 · · · through hole 16 · · · piercing stick

Claims (3)

A container body comprising a microwave heating sheet and having a bottom and a side wall;
A container for a microwave oven comprising a lid covering the container main body, comprising a through hole in a central portion, and a piercing rod that removably closes the through hole and reaches the inside of the container main body.   The container for microwave oven according to claim 1, wherein a depression is provided in a central portion of the bottom portion of the container main body.   The lid has a peripheral edge bent downward, and the lower end of the peripheral edge covers the container body so as to be positioned below the upper end of the side wall of the container body. The container for microwave ovens of Claim 1 or 2.

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