JPH0834481A - Package for micro-wave heating - Google Patents

Abstract

PURPOSE:To bake the surface of a frozen food into a light brown color by a method wherein for a package consisting of an external packaging body and micro-wave sensitive heating sheet-form objects, air discharge ports are formed on the external packaging body, and the micro-wave sensitive heating sheet-form objects are arranged at locations to be confronted with the surfaces of food pieces. CONSTITUTION:A micro-wave sensitive heating sheet-form object 1 which is used for a package for micro-wave heating has a laminated structure of an internal paper sheet 3 which is confronted with a food piece, external paper sheet 4 and plastic sheet 5, and forms a plurality of divisions in the external packaging body when being put in the external packaging body by combining a plurality of sheet-form objects 1 to each other by utilizing slits which are locally formed. The external packaging body is formed into a box-shape by punching out a flat carton base paper, and building it up, and a micro-wave sensitive heating sheet is bonded on the internal surface. Also, on side surface panels 11-14 of the external packaging body, air discharge ports 22 for steam, of an appropriate size, is provided at a plurallity of locations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to microwave heating using a microwave-sensitive sheet material used for heating food such as frozen food in a microwave cooker. It's about packages.

More specifically, the food is cooked by directly thawing and heating the frozen food containing water by microwaves and indirectly by heating it through a sheet material sensitive to the microwave. The present invention relates to a microwave heating package capable of suitably releasing the vapor generated in the outside of the package, finishing the surface of the food inside the package in a crisp state, and preventing a sticky state. .

[0003]

2. Description of the Related Art In recent years, with the rapid progress of freezing processing technology, a wide variety of foods have been made into frozen foods, such as fried chicken, chicken nuggets, pizza, gratin, bread dough and pie dough. There is.

Many of these many frozen foods are usually
A method is used in which the food is thawed and cooked while heating with a cooking device having an oven function such as a microwave oven and a toaster oven. By using the oven function of the cooking device, the frozen food can be crispy on the surface of the food, burnt brown, or burnt to a fox, just like when cooking ordinary food. , It can be finished to look good.

However, when such an oven function is used, it takes a long time to cook, and it is necessary to take it out from a commercially available packaging container, transfer it to a container that can be used in an oven cooker, or wrap it in a foil or the like. It takes time and effort to prepare for cooking. Furthermore, users of frozen foods such as fried chicken, chicken nuggets, pizzas, and gratins are often singles or singles who do not cook themselves or who do not cook at all, and many are reluctant to lose time.

[0006] In addition to these users, a single person or a single person may have a microwave cooker, such as a microwave oven, which is convenient for heating food cooked at a convenience store that is open 24 hours a day. , It wasn't available in homes that didn't even have an oven. When it is heated in the microwave, the food you buy can be used as it is in the container containing the food, there is no need to prepare before heating, and there is an advantage in that it does not take time to heat.

[0007] Therefore, it is desirable that the above-mentioned frozen food can be heated and cooked by using the microwave oven so as to take advantage of the microwave cooker such as the microwave oven. However, when cooking such frozen food in the microwave oven, 2450 MH generated by the magnetron used
Ultra-high frequency waves (microwaves) called z are applied to foods to cause molecular vibrations of water contained in the foods themselves, and cooking is performed by frictional heat generated by the movement of the molecules. Usually, foods are foods. Since it is cooked in a wrapping film for packaging, the food surface cannot be baked crisply like when cooking food in the oven. It is not possible to let the steam such as the outside escape to the outside, it is adsorbed on the surface of the food, the phenomenon that the surface side becomes fuzzy or sticky occurs, the taste of the food is impaired, and it also looks unappealing However, there are many problems to be solved, and there is no example in which the frozen food is used after being cooked in a microwave cooker such as a microwave oven.

[0008]

Accordingly, it is an object of the present invention to provide a novel microwave heating package.

Another object of the present invention is to cook and heat the frozen food contained in the microwave heating package using a microwave cooker to bake the surface of the frozen food in a fox color. It can be browned and can quickly escape the steam generated during cooking without condensing, and the entire surface of the cooked food can be baked crisply, giving a good taste. A microwave heating package that can be used is provided.

[0010]

[Means for Solving the Problems]
No. 169624 proposes a microwave heating package that heats and cooks substantially stick-shaped food pieces such as French fries using a microwave oven.

According to the publication, there is provided a microwave heating package for accommodating a plurality of substantially rod-shaped food pieces, the package including an outer packet body through which microwaves pass and an inner package body. 1 to a plurality of microwave-sensitive heating sheets, and the microwave-sensitive heating sheets are arranged in a substantially axial direction in order to arrange the plurality of food pieces apart from each other along the substantially axial direction of the outer package. A package characterized by being processed into a shape having a surface portion substantially parallel to the axial direction so as to form a plurality of grooved paths and a plurality of partition portions standing from this surface, wherein the axis of the outer package is One of the side surfaces substantially perpendicular to the direction is defined as an open surface, and the other surface is formed with an exhaust port having a shape such that the food piece does not fall out with the other surface side facing downward. Microwave heating pad By using the microwave cooking device to cook and heat the stored substantially rod-shaped food pieces, the surface of the food pieces can be baked in a fox color and browned, The steam generated therein can be quickly released at any time without condensing, and the entire surface of the food piece can be baked crisply to give an excellent taste.

However, the microwave heating package disclosed in the publication is mainly intended for substantially stick-shaped food pieces such as French fries, and is used for various foods such as fried chicken, chicken nuggets, pizza, gratin, bread dough and pie dough. It was still not a sufficient structure to be applied directly to frozen foods in the form of.

Therefore, as a result of intensive studies on the novel microwave heating package in order to achieve the above object, the present inventors have found that the present invention is based on the technical idea proposed in Japanese Patent Application No. 6-169624. It was found that the above objects can be achieved by newly creating the structure of the invention as the structure of the microwave heating package that can accommodate the above-mentioned frozen food, and the present invention has been completed based on this finding. .

That is, the object of the present invention is (1) a microwave heating package for containing food pieces, the package comprising an outer package through which microwaves pass,
It comprises one or a plurality of microwave-sensitive heating sheet materials arranged inside the outer package, and the microwave-sensitive heating sheet material is processed to form one or a plurality of compartments. In the microwave heating package characterized by the above, the outer package has an exhaust port, and the microwave-sensitive heating sheet-like material is arranged at a position facing the surface of the food piece. Is achieved by a microwave heating package.

Further, the object of the present invention is also achieved by (2) the microwave heating package shown in the above (1), wherein at least one of the side surface and the upper surface of the outer package has a structure capable of opening and closing. To be done.

Further, the object of the present invention is (3) the above (1) or (2), wherein the whole surface of the outer package is hermetically sealed with a protective film after the food pieces are housed in the microwave heating package. It is also achieved by the microwave heating package shown in.

[0017]

In the microwave heating package of the present invention, the outer packaging body has an exhaust port, and the microwave-sensitive heating sheet material forms a plurality of partitions for arranging food pieces apart from each other. Processed into a shape having a structure arranged at a position facing the surface of the food piece, conventionally, including fried potatoes that require cooking with a cooker having an oven function, further fried chicken, chicken nuggets, The surface of frozen foods such as pizza, gratin, bread dough, and puff pastry can be crispy, browned, or baked into a fox color, giving it a visually pleasing finish.

Further, in the microwave heating package of the present invention, since at least one of the side surface and the upper surface of the outer package has an openable / closable structure, the surface is opened during cooking to serve as an exhaust port. Steam can be quickly released during cooking, and food pieces after cooking can be easily taken out.

Further, in the microwave heating package of the present invention, after the food pieces are housed in the microwave heating package, the entire surface of the outer package is hermetically packaged with a protective film, and therefore, cooking is performed after hermetically packaging. Until then, the food pieces can be stored in a fresh state and hygienically.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

First, FIG. 1 is a schematic perspective view showing an embodiment of the microwave-sensitive heating sheet material used in the microwave heating package according to the present invention.

As shown in FIG. 1, the microwave-sensitive heating sheet 1 that responds to microwaves is provided with cuts or slits 2 which are partially provided. By providing the cuts or slits 2, the first microwave-sensitive heating sheet material 1a is inserted and meshed with the second microwave-sensitive heating sheet material 1b so as to be perpendicular to each other. , The microwave-sensitive heating sheet 1 that is orthogonal to each other and reacts with microwaves is assembled,
It is processed into a shape having partition walls so as to form a plurality of compartments (six compartments) for arranging the food pieces to be stored apart from each other. Accordingly, the microwave-sensitive heating sheet material 1 can be structured to be arranged at a position facing the surface of the food pieces stored in each compartment.
Therefore, when the food pieces are stored in the respective compartments and cooked by using the microwave cooker, the heat conduction by the heat generation of the microwave-sensitive heating sheet material 1 surrounding the surface of each food piece causes The surface of a frozen food such as a fried chicken, a fried potato or a chicken nugget can be crisply baked.

The structure of the microwave-sensitive heating sheet material 1 of the present invention is not limited to the above.
For example, as shown in FIG. 2, a plurality of stepwise microwave-sensitive heating sheet materials 1c bent twice at right angles and a microwave cross-section microwave-sensitive heating sheet material 1d having a horizontal cross section are appropriately combined. , A structure (shape) formed by processing the stored food pieces into a shape having partition walls so as to form a plurality of compartments for arranging the food pieces apart from each other, a rectangular wave as shown in FIG. A structure obtained by processing the microwave-sensitive heating sheet 1 that has been bent into a shape into a shape having partition walls so as to form a plurality of compartments for arranging the food pieces to be stored apart from each other (shape) ), And as shown in FIG. 4, by bending the flexible film-shaped microwave-sensitive heating sheet material 1 into a wavy shape,
The shape of the outer package to be used, such as a structure (shape) formed by processing into a shape having partition walls so as to form a plurality of compartments for arranging the food pieces to be separated from each other, and the food to be stored It is designed appropriately according to the type, shape, etc. of the piece, and has been conventionally used for various insole members, partition members, lining members, etc. of various storage containers such as storage boxes and storage packages. Other sheet-like material structures (shapes) can also be applied.

FIG. 5 is a schematic view showing a sectional structure of the microwave-sensitive heating sheet used in FIG. 1 as one embodiment of the microwave-sensitive heating sheet used in the present invention.

From FIG. 5, the microwave-sensitive heating sheet material 1 is made by laminating three separate sheets, and the inner paper sheet 3, the outer paper sheet 4 and the outer paper sheet 4 facing the food piece are formed. It is composed of a flexible plastic sheet 5 such as a polyester film. The plastic tech sheet 5 has a thickness of 2 mils (2/1000 inch thick), and the surface of the plastic tech sheet 5 is coated with a metal such as aluminum by vacuum vapor deposition, and the plastic tech sheet 5 has a thickness of about 2 mils. A semi-conductive metal coating 6 with a transmission of 40-60% is applied. This allows the plastic sheet 5 to act as a backing material for the microwave-responsive semi-conductive metal coating 6. It should be noted that the semiconducting metal coating 6 is semiconducting, interacts with microwave energy in the microwave cooker, absorbs some of the microwave energy and exchanges that energy for heat. Therefore, in place of the semi-conductive metal coating 6, other known coatings or substances which become hot in the microwave cooker, for example minerals, metal oxides, salts or carbon are used in suitable combination. It is also possible to do.

As the semiconductive metal, those described in US Pat. No. 4,970,358 can be used. One example thereof is a conductive medium which is conductive and interacts with microwaves. Particles, for example, carbon (if necessary, particles of aluminum, copper, nickel, etc. may be contained in a proportion of 1 to 20%), and particles that are non-conductive and do not interact with microwaves, for example, the same publication. Inorganic hydrates as listed in Table 1 above can be used to form a homogeneous mixture.

The adhesive used for adhering each of the inner paper sheet 3, the outer paper sheet 4 and the plastic sheet 5 is not particularly limited, and for example, a polyvinyl acetate emulsion type adhesive 7 can be used. Such a suitable adhesive has been used. Further, it is desirable that the inner paper sheet 3 is oil resistant paper, and the outer paper sheet 4 is
Normal kraft paper can be used.

FIG. 6 shows a development view of an embodiment of an outer package used in the microwave heating package according to the present invention.

From FIG. 6, to form an outer packet through which microwaves can pass, a flat carton base paper 10 formed from a food board is punched out. The flat carton base paper 10 includes a plurality of side panels 11 to 11 for forming side walls of an outer package.
14, tabs 15 to 17 for forming a wall on the upper surface, tabs 18 to 20 and a panel 14 for forming a wall on the lower surface
And a panel 21 for adhering to, and at the same time as punching, the panels 11 to 14 and 21 and the tabs 15 to 20.
Vertical and horizontal valley fold lines are formed at the boundary between and. Next, the flat sheet carton base paper 10 is lined with the microwave-sensitive heating sheet on an inner surface of the flat carton base paper 10 in an assembled state as an outer envelope body along with an inner peripheral surface of the outer envelope body with an adhesive. Stick. At this stage, the side panels 11 to 14 have 20 steam outlets 22 of appropriate size.

In order to form a microwave heating package while forming an outer package through which microwaves can pass, the panels 11 to 14 and 18 of the flat carton base paper 10 are sequentially processed from left to right in FIG. The panels 18 are bent along the vertical valley fold lines so as to be perpendicular to each other, and finally, the panel 18 is adhered to the side panel 14 to form a tubular outer envelope body. Next, among the tabs 18 to 20 for forming the wall on the lower surface, first, the tabs 19 and 20 are sequentially bent at a right angle according to the horizontal valley fold line, and then the tabs and 18 are formed.
And 18a are bent at right angles according to the horizontal valley fold lines to bond tabs 19 and 20 to tab 18, respectively, and tab 18a to the inside of side panel 13 to form the bottom wall of the outer envelope.

Then, the assembled microwave-sensitive heating sheet shown in FIG. 1 is inserted into the outer packet from the opening of the upper surface of the outer packet to arrange the food pieces apart from each other. 6 sections are formed in the. Next, food pieces such as fried chicken, the assembled microwave-sensitive heating sheet, from the top opening of the outer package, after being inserted into the outer package, each formed sequentially One piece is stored in each compartment.

Next, the tabs 15 to 17 are bent at right angles in accordance with the horizontal valley fold line, and finally the tab 16a is inserted into the inside of the side panel 11 to form an openable and closable upper wall. 7 is assembled by using the microwave-sensitive heating sheet shown in FIG. 7 and the outer package shown in FIG.
To the package shown in the schematic perspective view showing one embodiment of the microwave heating package shown in FIG. As a result, all the surfaces of the stored food pieces are surrounded by the microwave-sensitive heating sheet material 1 that reacts with microwaves. As a result, in the process of heating, the microwave-sensitive heating sheet material 1 absorbs microwave energy and transfers the generated heat directly to the surface of the food piece to burn all the surface of the food piece brown. In this case, it is finished in a crispy state because it is baked in a fox color and the exhaust port 22 provided around the outer package allows the steam generated from the food pieces to escape to the outside.

The outer package according to the present invention is not limited to the structure (shape) shown in the above-mentioned embodiment, but an appropriate structure (shape suitable for the above-mentioned shape of frozen foods). It is possible to select and use a suitable one from the packaging package of the shape), the packaging box, and the like.

Furthermore, in the microwave heating package, the entire surface of the outer package is made of polypropylene or polyvinylidene chloride (saran) in order to store the stored food pieces in a fresh state until the microwave heating package is actually used. It is stored in a state where it is wrapped in a protective film such as a film for packaging foods and sealed and then rapidly frozen for storage and storage.

Here, the protective film that can be used in the microwave heating package according to the present invention is not particularly limited, and any conventionally known protective film can be used. For example, a cellulose film laminated with polyethylene, Polyester laminated with low density polyethylene, polyvinyl chloride, polypropylene, polyamide, polyvinylidene chloride and the like can be used, but the protective film usable in the present invention is not limited to these, Other known ones can be applied.

Next, when the microwave heating package is cooked in a cooker, first, the protective film on the entire surface of the outer package is removed, and the microwave heating package is placed in a microwave cooker such as a microwave oven. And cook with microwave for a predetermined time. After cooking, remove from the microwave oven, open the upper wall that can be opened and closed, and cook the fried chicken, fried potatoes,
Food pieces such as chicken nuggets and pizza can be taken out and eaten, and foods such as bread, pie, gratin and lasagna may be transferred to a suitable plate or the like.

As the food pieces that can be stored in the above compartment, for example, a method of thawing and heating while cooking with a cooker having an oven function such as a microwave oven and a toaster oven is generally used. Examples include fried chicken, french fries, chicken nuggets, pizza, gratin, doria, lasagna, crepes, pancakes, dough and puff pastry that have been found to be unsuitable for cooking in a microwave oven.

Since such foods have different external shapes, it is necessary to select an appropriate outer package and sheet according to each food.

For example, in the case of thin food such as pizza, gratin, doria, lasagna, etc., the surface mainly hits only the upper surface. Therefore, the microstructure having the structure (shape) shown in FIGS. The microwave-sensitive heating sheet cannot be used, and the microwave-sensitive heating sheet is internally provided on the inner peripheral surface of the box in a thin box (outer package) capable of storing the pizza or the like. It is preferable to have a structure to be attached along, and in this case, the upper surface of the box can be opened and closed so that it can be opened during cooking or the above can escape to the upper surface portion. It is necessary to provide a plurality of large exhaust ports (for example, an exhaust port that makes up about 50% or more of the total area of the upper wall of the upper surface).

In the case of bread dough whose volume changes greatly during cooking, it is necessary to use an outer package larger than the frozen food to be stored.
For bread dough, etc., a container (outer package) in the shape of a bread when it is fluffed after cooking is used, and even in this case, it is not necessary to divide the inside of the outer package into a plurality of containers (outer package). It is preferable to have a structure in which the microwave-sensitive heating sheet is adhered to the container along the inner peripheral surface of the container. Similarly, the upper surface of the container has an openable and closable structure,
When cooking, this is opened, or multiple large exhaust ports are provided on the upper surface so that the above can escape (for example, an exhaust port that makes up about 50% or more of the total area of the upper wall of the upper surface). The bread dough is stored in the bottom portion of the outer package and cooked, and as the bread dough is baked, the bread dough is baked fluffy in the storage container.

Further, in the case of thin foods such as crepes and pancakes that do not lose their shape, the rectangular corrugated sheet-like material and the flexible corrugated sheet-like material as shown in FIGS. The food can be stored in a sandwiched manner, and by using an ordinary rectangular box (outer package) and inserting it into the box, the flat surface portion of the food can be heated from both sides. Also in this case,
The top of the box has a structure that can be opened and closed so that it can be opened during cooking, or a large number of large exhaust ports (for example, the total area of the upper wall of the upper It is necessary to provide an exhaust port) which is about 50% or more.

For the foods such as fried chicken, fried potatoes and chicken nuggets described above, the sheet-like material shown in FIG. 2 may be used in addition to the sheet-like material shown in FIG.

[0043]

INDUSTRIAL APPLICABILITY In the microwave heating package according to the present invention, a microwave-sensitive microwave is used to heat a microwave-sensitive heating sheet-like product, so that the food is frozen in the same way as an oven. Can be quickly thawed and baked in a short time, the surface of cooked food pieces can be baked in a fox color and browned, and the entire surface of food pieces can be baked crisply, which is excellent. It is also highly portable, as it allows you to enjoy a delicious taste and open the upper wall that can be opened and closed while holding the package to take out and eat cooked food.

Further, in the microwave heating package of the present invention, food pieces can be sanitarily stored in a fresh state from the time after sealed packaging to the time of cooking, and the freshness is lost by freezing. It is possible to obtain a long shelf life without any trouble.

Further, even a single person, a single person or the like who cannot cook in an oven or who does not have an oven cooker can buy the package of the present invention in which frozen food is stored as long as there is a microwave oven. , We can provide products that can be easily used by putting it in the microwave as it is and heating it for a certain period of time. The vending machine with built-in microwave cooking function that can be installed in the position facing the front can be directly provided with services or sold, and the packaged product structure has excellent portability (portability). Because
The user can eat warm food that has been cooked on the spot or while moving (carrying), in addition to taking it home and using it.

Therefore, the packaged product according to the present invention can be obtained in a fresh state anytime, anywhere, has a storability, is hygienic, and saves the time and effort of cooking and is convenient.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a microwave-sensitive heating sheet material used in a microwave heating package according to the present invention.

FIG. 2 is a schematic perspective view showing another embodiment showing the structure of the microwave-sensitive heating sheet material used in the microwave heating package according to the present invention.

FIG. 3 shows a structure of a microwave-sensitive heating sheet material used in a microwave heating package according to the present invention,
The schematic perspective view which shows other one Embodiment is shown.

FIG. 4 shows a structure of a microwave-sensitive heating sheet material used in a microwave heating package according to the present invention,
The schematic perspective view which shows another one embodiment is shown.

FIG. 5 is a schematic view showing a cross-sectional structure of the microwave-sensitive heating sheet used in FIG. 1 as one embodiment of the microwave-sensitive heating sheet used in the present invention.

FIG. 6 shows a development view of an embodiment of an outer package used in the microwave heating package according to the present invention.

7 is a schematic perspective view showing an embodiment of a microwave heating package assembled by using the microwave-sensitive heating sheet material shown in FIG. 1 and the outer package shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Microwave-sensitive heating sheet-like material, 2 ... Cut or slit, 3 ... Inner paper sheet, 4
… Outside paper sheet, 5… Plastec sheet,
6 ... Semi-conductive metal coating, 7 ... Adhesive,
10 ... Flat carton base paper 11-14,
21 ... Panel, 15-20 ... Tab, 22 ... Exhaust port, 30 ... Microwave heating package.

Claims (3)

[Claims] 1. A microwave heating package for accommodating a piece of food, the package comprising an outer package through which microwaves pass, and one or a plurality of microwave sensing elements disposed inside the outer package. A microwave heating package, comprising: a heating sheet-like material, wherein the microwave-sensitive heating sheet-like material is processed so as to form one or a plurality of compartments. A microwave heating package having a structure in which the microwave-sensitive heating sheet material is arranged at a position facing the surface of the food piece. 2. The microwave heating package according to claim 1, wherein at least one of a side surface and an upper surface of the outer package has an openable / closable structure. 3. The microwave heating package according to claim 1, wherein after the food pieces are stored in the microwave heating package, the entire surface of the outer package is hermetically sealed with a protective film.