JP4614334B2 - Self-supporting microwave packaging container and package - Google Patents

Description

The present invention relates to a self-supporting microwave packaging container in which the above-mentioned flat soft packaging bag for microwave ovens containing food to be cooked in a microwave oven is stored in the above-mentioned sleeve-shaped cardboard, and its package.
More specifically, a flat soft packaging bag for microwave ovens filled with contents such as foods made of liquid, solid, or a mixture thereof can be frozen in a state of being stored in sleeve-like cardboard, and in the microwave oven. The present invention relates to a package that can be cooked by automatically removing steam in a self-supporting state.

2. Description of the Related Art Conventionally, many packaged foods in which cooked or semi-cooked food is filled and stored in plastic packaging bags and cooked with a microwave oven before eating or drinking are commercially available.
And in the packaging body which sealed the packaging material which consists of a heat-adhesive resin layer which has easy peelability in an inner layer with a thermal adhesion part, at least one place of the inner circumference part of the packaging body from the inner circumference part of the packaging body A package body has been proposed that has an overhanging portion that protrudes inward and is thermally bonded, and in which the cutting edge or notch is formed in the overhanging portion. Can be completely sealed, and can be cooked by a microwave oven while the food is stored in a packaging bag, and steam generated during cooking is automatically opened and released from the package. Rupture and deformation can be prevented (see, for example, Patent Document 1).
In addition, the microwave packaging bag has at least a resin layer between the heat-resistant base material layer and the sealant layer that has a predetermined strength in a temperature environment of room temperature or lower, but has a predetermined strength that decreases in a high temperature environment. The structure is provided in one area, and the contents can be completely sealed in the packaging bag, and the food can be cooked by a microwave oven while being stored in the packaging bag, and steam generated during cooking is further packaged. A packaging bag has been proposed in which a part of the bag automatically opens and escapes to prevent rupture and deformation of the package (see, for example, Patent Document 2).
On the other hand, various structures have been proposed in which an exterior packaging box is used or processed to assist the pouch and to be self-supporting to enable cooking in a microwave oven.
For example, in a flat box-shaped decorative box used for outer packaging of a microwave heating pouch, a peeled piece cut line on the top surface of the box, a side cut line connected to the peeled piece cut line on both sides of the box, the bottom surface of the box A cosmetic box for a microwave heating pouch has been proposed in which a fold line connected to the side cut line and a pouch support part cut line connected to the fold line are formed (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 11-208739 JP 2000-190912 A JP 2003-170930 A

However, in the microwave oven packaging bag according to Patent Document 1 or Patent Document 2, when the bag is filled with the contents and sealed, and placed flat in the microwave oven and heated, it is liquid other than solid matter. When the contents are contained, there is a problem that the liquid contents are blown out from the vent structure part and the inside of the range is soiled.
In order to solve the above-mentioned problems, when the microwave oven packaging bag according to Patent Document 1 or Patent Document 2 is in a stand pouch mode, there is a problem that the microwave bag is easily overturned while being rotated. Since the microwave oven packaging bag of the aspect is not a flat shape, there is a problem that the heat of the microwave oven is not uniformly applied.
Moreover, when the packaging bag for microwave ovens which concerns on patent document 1 or patent document 2 is made into a stand-pouch mode, after filling the contents and sealing the filling port in addition to the above problems, the manufactured package is stored frozen. In this case, if the contents are hardened in a state of being biased in the packaging bag, there is a problem that the self-supporting property of the package on the tray is lowered when heating in the microwave oven.
With the use of the microwave oven heating pouch cosmetic box according to Patent Document 3 for the purpose of assisting the microwave packaging bag and making it self-supporting and allowing cooking in the microwave oven, the microwave oven heating pouch cosmetic box is insulated. Since there is an effect, there is a problem that the refrigeration efficiency is reduced, and in the form of the microwave oven heating pouch cosmetic box according to Patent Document 3, the content filled in the microwave packaging bag is a liquid content When it is a thing, there existed a problem that there exists a possibility that it may spill in a microwave oven.

  An object of the present invention is to solve the above problems, and is a microwave packaging container having a vent structure part that automatically opens steam in a packaging bag by heating a microwave oven, The package using this can be stored in a frozen state efficiently, the contents can be heated uniformly, and it is stable and self-supporting. An object of the present invention is to provide a self-supporting microwave packaging container that can prevent blow-out and can be safely taken out from a microwave oven, and a package thereof.

Therefore, in order to solve the above problems, a packaging container for a self-supporting microwave oven according to the present invention is a packaging container for a self-supporting microwave oven in which a flat packaging bag for a microwave oven is housed in a sleeve made of cardboard. The flat packaging bag for the microwave oven has a vent structure portion for releasing steam by heating the microwave oven, and the sleeve made of the cardboard is used when the rectangular flat packaging bag for the microwave oven is stored. It has a rectangular bottom plate continuously connected via a broken line to the bottom of the front plate having a shape corresponding to the vent hole structure, and is symmetrical to the front plate via the broken line. A back plate having the same shape as the front plate, and having a sticking plate continuously connected via a fold line to a side other than the notched side and the bottom side of the back plate, and the bottom plate has a fold-like shape. When folded inside to form a gusset part In addition, the front plate and the back plate are bonded together by the sticking plate, and the outer surface of the flat soft packaging bag for microwave oven and the inner surface of the sleeve made of cardboard are separable from each other in a non-bonded state It is a packaging container for self-supporting electronic features characterized by being closely attached.
Further, the present invention is a self-supporting microwave packaging container in which a flat packaging bag for a microwave oven is housed in a sleeve made of cardboard, the sleeve made of cardboard passing through a fold line on the side (a) of the L-shaped front plate. A back plate having the same shape as the front plate connected symmetrically with the front plate, and a rectangular bottom plate connected to the side (b) of the front plate via a fold line, It has a rectangular bottom plate connected to the side (b) of the back plate via a fold line, and is connected to the sides (e) and (f) of the back plate and the bottom plate via a fold line. A vent structure for venting steam by heating the microwave oven at a position exposed outside when the flat packaging bag for microwave oven is housed in the upper sleeve made of cardboard. The front plate, the back plate, and the bottom plate are bonded together by the adhesive plate, and the electronic And the outer surface of the flat flexible packaging bag Nji, the inner surface of the sleeve made of the cardboard is self-supporting microwave packaging container, characterized in that in close contact with unbonded separable from one another.

Further, in the above-described self-supporting microwave packaging container according to the present invention, the outer surface of the above-described flat soft packaging bag for microwave oven and the inner surface of the above-mentioned sleeve made of cardboard are separable from each other in a non-adhered state. It is characterized by being in close contact.

Further, in the self-supporting microwave packaging container according to the present invention, the sleeve made of cardboard is formed by closing the opposing inner surfaces of the folded-back portion of the folded-back shape through an adhesive layer. Features.

  In the self-supporting microwave packaging container according to the present invention, the flat soft packaging bag for microwave oven is composed of a laminated film in which a heat-resistant base material layer and a sealant layer are laminated, and steam As an air vent structure part for removing, it has an overhanging part that protrudes from the upper side seal part to the inside of the packaging bag and has a peeling corner at the center side of the packaging bag, and an unbonded part in the overhanging part Is provided, and a cut or a notch is formed in the unbonded portion at least on the inner side of the planned peeling position of the peeling corner portion.

  In the self-supporting microwave packaging container according to the present invention, the flat soft packaging bag for microwave oven is composed of a laminated film in which a heat-resistant base material layer and a sealant layer are laminated, and steam As a vent structure for removing, a resin layer having a predetermined strength in a temperature environment of room temperature or lower between the heat-resistant base material layer and the sealant layer, but having the predetermined strength decreased in a high temperature environment. The upper edge seal part is formed so as to cross from the inner side to the outer side of the packaging bag.

  Moreover, in the said flat soft packaging bag for microwave ovens, the height from a bottom part to an upper part is 160 mm or less, and the ratio of the length of the height and width is 1: 0.7-1: 1. .4.

The self-supporting microwave packaging body according to the present invention is frozen in a state where the above-mentioned flat soft packaging bag for microwave ovens containing food to be cooked in a microwave oven is accommodated in the above-mentioned sleeve made of cardboard. It is characterized by.

The microwave packaging bag constituting the packaging container for a self-supporting microwave oven of the present invention has a structure having a vent structure part at the top of the bag, so that the steam in the packaging bag is heated when heated in the microwave oven. Since it is possible to automatically open the bag, there is an advantage that it is not necessary to open the bag in advance with a bag before heating the bag.
Moreover, since the form of the said packaging bag for microwave ovens is flat shape, compared with a stand pouch, since heat | fever conducts uniformly to the contents, it has the advantage that thermal efficiency improves.
Furthermore, the flat soft packaging bag for a microwave oven has a height of 160 mm or less, and the length in the height direction and the width direction is set to a predetermined ratio so that the tray in the microwave oven can be used. It has the advantage that it can rotate in a state where it stands up stably.
In addition, the self-supporting microwave packaging container of the present invention is provided with the above-mentioned microwave oven soft packaging body even if the microwave soft packaging body itself is deformed by freezing while the contents are stored in the packaging bag. By storing it in a thick cardboard, there is an advantage that it is possible to stably stand on its own.
Further, the sleeve made of cardboard closes the inner surfaces facing each other of the folded-back portion of the crease through an adhesive layer, thereby holding the flexible packaging for microwave oven flat and freezing. When the packaging body is heated in a microwave oven, the folded portion of the crease-like shape can be easily folded into a gusset shape, and the packaging body can be stably heated on the tray of the microwave oven. Has the advantage of being able to.
Further, since the sleeve made of cardboard constituting the packaging container for a self-supporting microwave oven of the present invention has an opening part of which is open at an end, it is more freezing than storing a packaging bag in an exterior packaging box. It has the advantage of excellent efficiency.
Further, the sleeve made of cardboard constituting the packaging container for a self-supporting microwave oven according to the present invention has a shape that at least exposes the vent hole structure portion formed in the flat soft packaging bag for the microwave oven. Therefore, even when heated in a microwave oven with the sleeve attached to the packaging bag, it is possible to efficiently release the steam generated by the heating to the outside, and because the bottom of the sleeve has a gusset shape, Since it can be heated in a microwave oven in a standing state, even if the liquid content is filled, there is an advantage that it is possible to prevent spilling due to overheating of the microwave oven.
Furthermore, since the packaging body for self-supporting microwave ovens of the present invention is covered with a sleeve-like cardboard on the outside of the packaging bag for microwave ovens, the consumer mistakenly flattens the packaging bag for microwave ovens. It is possible to prevent the product from being placed in a flat state, holding the vent structure downward, or toppling over, and holding the package upright even after opening the bag with a notch. It is.
In addition, the self-supporting microwave packaging body of the present invention is not in direct contact with the heated soft packaging bag for a microwave oven because the outside of the microwave packaging bag is covered with a sleeve-like cardboard and adhered. Since it can be taken out from the microwave oven by holding the sleeve part made of cardboard, it can be prevented from being burned on the hand, and it can be prevented from taking out the vent hole structure part downward, There is an advantage that the contents can be safely removed without spilling.
Further, since the outer surface of the flat soft packaging bag for microwave oven and the inner surface of the sleeve made of cardboard are in close contact with each other so as to be separable from each other, the sleeve and the flat can be easily disposed when discarded. Because it can be separated from the soft packaging bag, it is environmentally friendly.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a developed plan view illustrating a sleeve made of cardboard for storing a flat soft packaging bag for a microwave oven according to the present invention, and FIG. 2 shows a flat soft packaging bag for a microwave oven according to the present invention. FIG. 3 is a front view of a self-supporting microwave packaging container in which a flat soft packaging bag for a microwave oven according to the present invention is housed in a sleeve made of cardboard , and FIG. FIG. 5 is a process schematic diagram of mounting the flat soft packaging bag for microwave oven according to the invention on a sleeve made of cardboard , and FIG. 5 shows a state in which the flat soft packaging bag for microwave oven according to the present invention is housed in a sleeve made of cardboard It is explanatory drawing for using it.

FIG. 1 is a developed plan view illustrating a sleeve 20 made of cardboard for storing a flat soft packaging bag for a microwave oven according to the present invention.
As shown in FIG. 1 (a), a cardboard sleeve 20 is formed by processing a paperboard or the like by a punching machine, and includes an L-shaped front plate 1, a bottom plate 2 forming a gusset portion M, an L-shaped plate. The back plate 3 and the strip-shaped sticking plate 4 are arranged in order via folding lines L1, L2, L3, and L4, respectively, and the sticking plate 5 is attached to the upper end and lower end of the back plate 3 via the folding lines L5 and L6. And the sticking board 6 is extended and comprised.
By forming the folding lines L1, L2, and L3, when the gusset portion of the bottom plate 2 of the sleeve is opened, it is possible to stably stand on its own.
Then, when the front plate 1 and the back plate 3 are assembled in the sleeve shape, the opening cut lines 7a and 7b may be engraved at the upper facing positions.
Thereby, when opening the gusset portion of the bottom plate 2, by cutting in advance along the top of the opening for the score line 7a and 7b, the upper portion of the flexible packaging bag housed in cardboard 20 of the sleeve is opened, cardboard The sleeve 20 itself can be held in an upright state without being deformed.
Also, as shown in FIG. 1B, the sleeve 20 made of cardboard has an L-shaped front plate 1, an L-shaped back plate 3, and a strip-shaped sticking plate 4 via fold lines L4 and L7, respectively. The bottom plate 2 is extended to the lower end of the front plate 1, the sticking plate 5 is extended to the upper end of the back plate 3 via L 5, and the bottom plate of the back plate 3 is folded at the lower end. The bottom plate 2 and the sticking plate 6 may be extended through L9 and L10.
Further, as shown in FIG. 1C, the sleeve 20 made of cardboard has an L-shaped front plate 1 and a bottom plate 2 that forms a gusset portion M, as in the developed view shown in FIG. A letter-shaped back plate 3 and a strip-like sticking plate 4 are arranged in order via folding lines L1, L2, L3, and L4, respectively, and are stuck to the upper and lower ends of the back plate 3 via folding lines L5 and L6. The board 5 and the sticking board 6 are extended and comprised.
Further, in the above, the sleeve 20 made of cardboard can be closed on the inner surface side of the folded side of the bottom plate 2 via the adhesive layer 25.
As the adhesive layer, an aqueous paste, hot melt, cold crew, adhesive, pressure-sensitive adhesive, delayed tack adhesive, or the like can be used. The adhesive strength of the adhesive layer is preferably an adhesive strength that can be easily opened by hand, because the folded portion having the crease shape can be easily folded into a gusset shape.

As a constituent material of the sleeve 20 made of cardboard according to the present invention, the sleeve 20 is rigid enough to stand upright in a state in which the packaging body of the flat soft packaging bag for microwave oven 10, 10 ′ filled with the contents is stored. It is not particularly limited as long as it has a heat insulation property that does not cause burn even if the sleeve 20 made of cardboard is held by hand from a microwave oven, for example, imitation paper, clay coated paper, craft paper, paperboard, synthetic paper, etc. Various types of paper can be used.

FIG. 2 is a plan view showing the flat flexible packaging bag 10, 10 ′ for a microwave oven according to the present invention.
As shown in FIG. 2 (a), a flat flexible packaging bag for microwave oven 10 according to the present invention is composed of a laminated film in which a heat-resistant base material layer and a sealant layer are laminated, and a sealant between the laminated films before and after. It is a packaging bag in which the end faces are heat-sealed, with the layers facing each other so as to face each other and leaving an opening serving as a filling port for the contents.
And the said flat soft packaging bag 10 for microwave ovens overhangs the inner side of the said packaging bag 10 from the upper edge seal part 7 as an air vent structure part for venting | deleting, and the center side of the said packaging bag 10 And a non-adhesive portion 11 is provided in the overhang portion 9, and at least from the planned release position of the exfoliation corner portion 8 in the non-adhesive portion 11. A notch 12 or a notch is formed inside.
Furthermore, in the above, an opening notch may be provided above the packaging bag. For example, an I-shaped notch or a V-shaped notch can be used as the opening notch.
The above-mentioned flat soft packaging bag 10 for a microwave oven is manufactured by filling a cooked or semi-cooked solid food or liquid food from the opening, and then sealing the opening by heat sealing. Because it can be cooked with a microwave oven while the food is stored in the packaging bag, the steam generated during cooking can be automatically opened from the vent structure by internal pressure and released. In addition to preventing rupture and deformation of the food product, there is a risk of contamination due to the liquid material in the stored food leaching out of the opening even when holding the package after cooking and moving the wrong contents in the direction of the opening. Because it is not flat and has a flat shape, the microwave oven is heated uniformly.

First, as the resin used for the heat-bonding resin layer of the sealant layer in the present invention, those generally used as food packaging materials heated or cooked in a microwave oven can be used.
Specifically, low-density polyethylene film, ultra-low-density polyethylene film, linear low-density polyethylene film, medium-density polyethylene film, high-density polyethylene film, unstretched polypropylene film, ethylene-vinyl acetate copolymer film, ethylene-acrylic An acid copolymer film, an ethylene-methacrylic acid copolymer film, an ethylene-methyl acrylate copolymer film, an ethylene-ethyl acrylate copolymer film, an ethylene-methyl methacrylate copolymer film, an ionomer film, or the like can be used. The thickness of the sealant layer is 20 to 100 μm, preferably 40 to 70 μm.

Next, the heat-resistant substrate layer is not particularly limited as long as it is used as a packaging material for frozen foods and chilled foods that are generally heated or cooked in a microwave oven. When the packaging bag is manufactured, it is provided so as to be arranged outside.
For example, stretched polyethylene terephthalate film, silica-deposited polyethylene terephthalate film, alumina-deposited polyethylene terephthalate film, stretched nylon film, silica-deposited stretched nylon film, alumina-deposited stretched nylon film, stretched polypropylene film, polyvinyl alcohol-coated stretched polypropylene film, nylon 6 / meta Any film among xylenediamine nylon 6 co-pressed co-stretched film, polypropylene / ethylene-vinyl alcohol copolymer co-pressed co-stretched film and the like can be used.
These heat resistant resin layers usually have a melting point of 150 ° C. or higher, and a thickness of 10 μm to 50 μm can be used.

  In addition, a printed layer can be formed on the upper surface side or the lower surface side of the heat resistant substrate layer. The printing layer is provided for the purpose of displaying contents or imparting aesthetics by a conventionally known gravure printing method or the like, and is not an indispensable layer and is provided as necessary.

Further, in the present invention, an intermediate layer may be provided between the sealant layer and the heat-resistant substrate layer, and the intermediate layer is packaged only by the sealant layer and the heat-resistant substrate layer. It is provided when the function as a bag cannot be sufficiently achieved.
The above functions include gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc., which are required as packaging bags. These final functions are achieved by providing an intermediate layer.
Examples of the base material used as the intermediate layer include polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, ethylene-propylene copolymer, saponified ethylene-vinyl acetate copolymer, and the like. Or the like can be used.
Also, one or more of these substrates can be used in combination.
In addition, the thickness of the base material only needs to satisfy a function required as a package, and can be appropriately selected as necessary.

In addition, as shown in FIG. 2, in the embodiment, the notch 12 has a laminated body 14 and a circular through-hole penetrating two sheets, but is not particularly limited. A notch may be formed.
Further, the shape of the cutout may be a circular shape, a semicircular shape, an elliptical shape, or a polygonal shape typified by a triangular shape, and I-shape, U-shape, V-shape as the shape of the cut. A shape that can discharge the internal pressure, such as a Y shape or a semicircular shape, can be used.
The notch 12 or the notch can be formed by laser processing, punching, or the like.

As the seal width of the overhanging portion 9, about 2 mm to 5 mm is preferable because the seal can be peeled off smoothly by the internal pressure due to heating.
If the seal width of the overhanging portion 9 is less than 2 mm, the seal strength becomes unstable, which is not preferable. If it exceeds 5 mm, it is difficult to peel off the seal smoothly due to internal pressure due to heating, which is not preferable.
On the other hand, the seal width of the end seal portion 7 is preferably about 5 mm to 20 mm because the bag does not break due to pressure or impact applied during transportation or storage.

Moreover, as shown in FIG.2 (b), the flat soft packaging bag 10 'for microwave ovens which concerns on this invention is comprised from the laminated | multilayer film which laminates | stacks a heat resistant base material layer and a sealant layer, as shown in FIG.2 (b). In addition, the vent structure part for venting steam has a predetermined strength in a temperature environment below room temperature between the heat-resistant base material layer and the sealant layer, but the predetermined strength in a high temperature environment. The lowering resin layer 22 is formed on a part of the upper side seal portion so as to cross from the inside to the outside of the packaging bag.
A resin layer in which the front and rear body members facing each other with the sealant layer on the inside are overlapped and a strip-like member folded back with the sealant layer on the outside is inserted, and the predetermined strength is lowered in a high temperature environment 22 is a packaging bag in which 22 is an upper portion, the side where the resin layer 22 is not formed is an opening 24, and the other edge is thermally bonded with the opening 24 remaining.
Further, in the above, an opening notch 13 may be provided above the packaging bag. For example, an I-shaped notch or a V-shaped notch can be used as the opening notch.

  Next, as a heat-resistant base material layer constituting the flat soft packaging bag 10 'for microwave oven shown in FIG. 2 (b), packaging for frozen food or chilled food generally heated or cooked in a microwave oven is used. If it is used as a material, it will not specifically limit, Specifically, the resin film similar to said heat resistant base material layer of Fig.2 (a) can be used.

Moreover, as a sealant layer which comprises the flat soft packaging bag 10 'for microwave ovens, it is possible to use the resin used for the heat-bonding resin layer generally used as a food packaging material heated or cooked in a microwave oven. The seal strength is not particularly limited as long as the seal strength is 25 N / 15 mm width or less at a temperature of 90 ° C. or more and 23 N / 15 mm or more at room temperature.
For example, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid A resin such as a copolymer, an ethylene-methyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, or an ionomer can be used.
The sealant layer may be formed by extrusion lamination of these resins, or laminated in advance by a base film layer and dry lamination or extrusion lamination as a film formed by T-die method or inflation method. Also good.
The thickness of the sealant layer is preferably about 20 μm to 100 μm, and more preferably 40 μm to 70 μm.

When the seal strength of the seal portion forming the resin layer 22 as a vent structure portion for venting the steam exceeds 25 N / 15 mm width at a temperature of 90 ° C. or higher, the seal retreat is smoothly performed. It does not occur, and automatic opening may not be achieved quickly and reliably, and it may be broken, which is not preferable. Further, the state of seal retraction is not particularly defined, but cohesive failure is preferred.
Moreover, it is preferable that it has a seal strength of 23 N / 15 mm or more at normal temperature because it can be used without being peeled off by pressure or impact applied during transportation or storage.

Between the heat-resistant base material layer and the sealant layer, the resin layer 22 that has a predetermined strength in a temperature environment of room temperature or lower, but decreases in the predetermined strength in a high temperature environment, has a low temperature (0 ° C.) and There is no particular limitation as long as it is a heat-adhesive resin layer that has sufficient sealing strength at room temperature (25 ° C.), low sealing strength when heated in a microwave oven (90 ° C. or higher), and has a property of quickly peeling.
Specifically, for example, ethylene-vinyl acetate copolymer resin, polyamide resin, polyamide-nitrified cotton resin, polyamide-nitrified cotton-polyethylene wax resin, urethane-polyamide-nitrified cotton resin or polyethylene wax-nitrification Mention may be made of resins containing cotton-based resins.
This has the advantage that partial destruction of the resin layer and the sealant layer is likely to occur when heated in a microwave oven.
For the formation of the resin layer 22, a conventionally known resin coating method can be used.
It is preferable that it is 1-5 micrometers.
If the thickness of the resin layer 22 is less than 1 μm, it is not preferable because the resin layer 22 and the sealant layer 16 are not easily broken when heated in a microwave oven.
Moreover, when the thickness of the resin layer 22 exceeds 5 μm, depending on the pattern of the resin layer 22, when the obtained film-shaped packaging material is wound into a roll shape, a part is raised, and the packaging of the portion is formed. This is not preferable because the material stretches.

  Furthermore, an intermediate layer may be provided between the heat-resistant base film layer and the sealant layer as necessary in the flat flexible packaging bag 10 'for a microwave oven, and as the intermediate layer, Usually, it is provided when the heat resistant base film layer and the sealant layer alone cannot sufficiently function as a packaging bag. As the material used for the intermediate layer, as with the laminated film constituting the flat soft packaging bag for microwave oven shown in FIG. 1, gas barrier property, mechanical toughness, flex resistance, puncture resistance, impact resistance, The same can be used for the purpose of imparting functionalities such as wear resistance, cold resistance, heat resistance, and chemical resistance.

Next, in the present invention, a method of making the flat flexible packaging bag for microwave oven 10, 10 'according to the present invention will be described. The laminate manufactured by the above method is used, and the inner layer sealant is used. The surface of the conductive resin layer is opposed and folded, or two of them are overlapped, and the peripheral end portion is heat sealed to provide a seal portion to form a bag body. Can do.
And as the bag making method, the above-mentioned laminated body is bent with its inner layer facing each other, or the two sheets are overlapped, and the peripheral edge of the outer periphery is, for example, a side seal type. , Two-sided seal type, three-sided seal type, four-sided seal type, envelope-sealed seal type, jointed seal type (pillar seal type), pleated seal type, flat bottom Heat-sealed in the form of a heat seal such as a seal type or the like can be used to manufacture various forms of packaging bags according to the present invention.
In addition, self-supporting packaging bags (standing pouches, gusset pouches) and the like can also be manufactured.
In the above, as the heat seal method, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal and the like are known. It can be done by the method.
In the present invention, the shape of the microwave packaging bag is not particularly limited as long as it is flat in a state of being accommodated in a sleeve made of cardboard . For example, it is not limited to a flat bottom seal bag shape, and is a gusset type. Even if it is a standing-type bag shape, it can be suitably used as long as it has a flat shape when the folds are folded. Since the microwave oven packaging bag according to the present invention is flat, the contents in the bag can be cooked uniformly in the microwave oven, which is preferable.
In addition, the flat soft packaging bags 10 and 10 'for microwave ovens have a height from the bottom to the top of 160mm or less, and are easy to put in and out in a state of being stored in a sleeve in a tray in a microwave oven, Moreover, since it does not contact the ceiling of a tray, it is preferable at the point which can prevent a fall, and also it is more preferable that height exists in the range of 140 mm-150 mm.
Moreover, it is stable in the tray in a microwave oven that the ratio of the length of the flat soft packaging bag for microwave ovens 10, 10 'is 1: 0.7-1: 1.4. It is preferable because it can be rotated in a standing state.

  Although not shown, the flat soft packaging bags 10 and 10 'for microwave ovens may be filled with liquid contents in addition to the solid contents. For example, curry, soup, soy sauce, Various fluid foods such as meat sauce, soup stock, miso soup with ingredients, spices, liquor for cooking, fruit juices, water and the like can be filled and packaged.

FIG. 3 is a front view of the self-supporting microwave packaging container 100 in a state in which the flat soft packaging bodies 10a and 10a ′ for microwave ovens according to the present invention are stored in the sleeve-like cardboard 20.
As shown in FIGS. 3 (a) to 3 (d), the shape of the side portion of the sleeve 20 made of cardboard according to the present invention does not cover the entire flat soft package for microwave oven 10a, 10a ′. It is necessary to have an opening that is open at the end of the portion, and at least to have a shape that exposes the vent structure portion 30 formed on the flat soft package for the microwave oven to the outside It is.
Specific shapes of the front plate and the back plate of the sleeve 20 made of cardboard according to the present invention include an L shape shown in FIGS. 3A and 3D, a U shape shown in FIG. 3B, and FIG. A shape such as an inverted T-shape shown in FIG.
By this, there exists an advantage that it is excellent in refrigeration efficiency rather than accommodating the said flat soft packaging body 10a for microwave ovens in the packaging box for exterior comprised from the cardboard with heat insulation.
In addition, the sleeve 20 made of cardboard constituting the self-supporting microwave packaging container 100 of the present invention has at least the vent hole structure portion 30 formed in the flat microwave soft packaging body 10a, 10a 'for the microwave oven. Can be efficiently released to the outside even if heated with a microwave oven while the sleeve 20 made of cardboard is mounted on the packaging bodies 10a and 10a '. It is excellent in that it is.
Further, package 10a on the opening side of the sleeve 20 made of cardboard, by providing a notch 13 formed in 10A ', after heating in a microwave oven, starting from the notch 30, while wearing the sleeve-like cardboard 20 The packaging bodies 10a and 10a 'are preferably opened, and the contents can be taken out safely.
In addition, in the above, as the shape of the sleeve 20 made of cardboard , either the front plate or the back plate has the shape shown in FIGS. 3A to 3D, and the other is from a flat flexible packaging bag for microwave ovens. A large rectangle may be used. This is preferable in terms of improving mechanical toughness and bending resistance.

In the self-supporting microwave packaging container 100, the sleeve 20 made of cardboard of FIGS. 3 (a) to 3 (c) folds the bottom gusset portion inward, and the opposing inner surfaces of the folded fold-like folded portions are connected to each other. It is configured to be closed through an adhesive layer.
Thereby, it is not bulky in the distribution process, and it is possible to protect the flattened soft packaging bodies 10a, 10a ′ for the microwave oven from external impacts during transportation.
Further, in the freezing process, the entire surface of the front plate 1 and the back plate 2 constituting the sleeve 20 made of cardboard is brought into close contact with the body surface of the flat soft package for microwave oven 10a, 10a '. Uniform pressure is applied to the body portions of the flat soft packaging bodies 10a, 10a ′ for use, and the flat soft packaging bodies 10a, 10a ′ can be frozen in a flat shape.
By this, when heating the self-supporting microwave packaging container 100 according to the present invention with a microwave oven, since the uniform heat is applied to the microwave-shaped flat soft packaging bodies 10a and 10a ', there is an advantage that it is preferable.
As shown in FIG. 5B, the self-supporting microwave packaging container 100 can be held upright by opening the folded gusset portion.

FIG. 4 is a process schematic diagram of mounting the flat soft packaging bag 10 for microwave ovens on the sleeve-like cardboard 20 according to the present invention.
FIG. 4 (a) shows a self-supporting microwave packaging shown in FIG. 3 (d), in which a flat soft packaging for microwave oven 10a is mounted on the sleeve-like cardboard 20 of the developed view shown in FIG. 1 (a). FIG. 10 is an explanatory view showing a process for producing the container 100.
As shown in FIG. 4 (a), a flat soft packaging body 10a for a microwave oven is stacked on the inner surface of the sleeve-like cardboard 20 shown in FIG. 1 (a) so that the vent hole structure 30 is exposed to the outside. Then, the sticking plates 4, 5 and 6 constituting the sleeve-like cardboard 20 are folded back at the folding lines L4, L5 and L6, and then folded inside at the folding line L2 at the bottom 2, and the sticking plates 4, As a result of being stuck through the adhesive layer formed in 5 and 6, the self-supporting microwave packaging container 100 shown in FIG. 3 (d) can be produced.
FIG. 4 (b) shows a self-supporting microwave packaging shown in FIG. 3 (d) in which a flat soft packaging body 10a for a microwave oven is mounted on the sleeve-like cardboard 20 of the development shown in FIG. 1 (b). FIG. 10 is an explanatory view showing a process for producing the container 100.
As shown in FIG. 4 (b), the flat soft package for microwave oven 10a is laminated on the inner surface of the sleeve-like cardboard 20 shown in FIG. 1 (b) so that the vent hole structure 30 is exposed to the outside. Then, the sticking plates 4, 5 and 6 constituting the sleeve-like cardboard 20 are folded back at the folding lines L4, L5 and L6, and then folded inside at the folding line L7 to give the sticking plates 4, 5 and 6 As a result of being stuck through the adhesive layer formed on, a self-supporting microwave packaging container 100 shown in FIG. 3D can be produced.
4 (c) shows a self-supporting microwave oven shown in FIG. 3 (a) in which a flat soft package for microwave oven 10a 'is attached to the sleeve-like cardboard 20 of the developed view shown in FIG. 1 (c). It is explanatory drawing which shows the process of producing the packaging container.
As shown in FIG. 4 (c), the flat soft package for microwave oven 10a 'is exposed on the inner surface of the sleeve-like cardboard 20 shown in FIG. 1 (c) so that the vent hole structure 30 is exposed to the outside. Next, the opposing inner surfaces 2 of the folded fold-like folded portion L2 of the bottom portion 2 constituting the sleeve-like cardboard 20 are adhered and closed with an adhesive layer 25, and then the sleeve-like cardboard 20 is constituted. An adhesive layer 25 formed on the adhesive plates 4, 5, and 6 by folding the adhesive plates 4, 5, and 6 inward at the folding lines L 4, L 5, and L 6, and then folding back at the folding line L 2 in the bottom 2. As a result, the self-supporting microwave packaging container 100 shown in FIG. 3A can be produced.

FIG. 5 is an explanatory diagram for using the flat soft package for microwave oven 10a according to the present invention in a state of being housed in a sleeve 20 made of cardboard .
As shown in FIG. 5 (a), when the self-supporting microwave packaging container 100 according to the present invention in the form of FIG. 3 (d) is erected, a perforation for cut line formed on the upper portion of the sleeve 20 made of cardboard. 7a can be cut out by hand, the folding line L2 can be opened, the folding lines L1 and L3 can be folded, and the self-supporting microwave packaging container 100 can be held upright.
By this, even if it heats with a microwave oven, the content does not blow out, and when taking out the self-supporting microwave packaging container 100 from the microwave oven, it is outside the flat soft packaging body 10a for the microwave oven. Since the sleeve 20 made of thick cardboard is mounted, it is possible to safely take out the sleeve-shaped cardboard portion having a heat insulation effect from the microwave oven by hand.
Moreover, as shown in FIG.5 (b), when raising the packaging body 100 for self-supporting microwave ovens based on this invention of the form of Fig.3 (a), the adhesion part 25 of the inner surface of the bottom gusset part is peeled off. Thus, the folding line L2 can be opened, the folding lines L1 and L3 can be folded, and the self-supporting microwave packaging container 100 can be held upright.

Next, the present invention will be described in further detail with reference to examples.
[Preparation of flat soft packaging bag 10 for microwave oven]
First, after printing a desired pattern with urethane resin gravure printing ink on one side of a biaxially stretched polyethylene terephthalate film (product name T4100, manufactured by Toyobo Co., Ltd.) having a thickness of 12 μm, a two-component reaction is further performed on the printed surface side. Using a polyurethane-type dry laminate adhesive, a biaxially stretched nylon film (product name ON, manufactured by Unitika) with a coating amount of 4 g / m2 and a thickness of 15 μm is bonded by the dry lamination method. Using a two-component reactive polyurethane-based dry laminate adhesive on the film surface, an application amount of 4 g / m2 is formed, and an unstretched polypropylene film (product name NEW-EXPARRT, manufactured by DNP Techno Film) with a thickness of 60 μm is dry lamination method As a result, layer structure, biaxially stretched polyethylene terephthalate fill To produce a laminated film sequentially stacked layers 12 [mu] m / printed layer / dry laminate adhesive layer 4g / m @ 2 / biaxially oriented nylon film 15 [mu] m / dry laminate adhesive layer 4g / m @ 2 / unstretched polypropylene film 60 [mu] m.
Next, using the laminated film produced above, cut into a shape of length 150 mm × width 160 mm, and overlap the unstretched polypropylene film of the laminated film so as to become the inner surface, one side of the long side An opening was formed, and the remaining three sides were formed with a seal width of 10 mm to form a heat-bonded portion to form a bag, and a vent structure for venting the vapor was formed above the bag.
(Formation of vent structure)
The position where the vent hole structure is provided is a short side edge near the long side, and a seal part (seal width, protruding in a U-shape so as to be connected to the heat bonding part on one short side) 3 mm).
Further, a through-hole having a diameter of 8 mm centered at a position of 40 mm from the long side edge and 15 mm from the short side edge was formed in the unsealed part surrounded by the U-shaped protruding seal part.
[Preparation of flat soft package 10a for microwave oven]
The three-side sealed bag obtained above was filled with retort curry (180 g / bag) from the opening, and the inside of the bag was heat-sealed and sealed. Thereafter, a retort sterilization treatment was performed at 120 ° C. for 40 minutes to obtain a flat soft package for microwave oven 10a.
[Production of sleeve 20 made of cardboard ]
A card paper having a basis weight of 310 g / m 2 was used to produce a sleeve 20 made of thick paper as shown in FIG.
The above-mentioned sleeve 20 made of cardboard is composed of a front plate, a bottom plate, and a back plate, which are sequentially arranged via folding lines, so as to form folding lines with a punching machine and have the following dimensions. Punched out.
As shown in FIG. 3 (a), the front plate and the back plate are L-shaped having a length of a, 155 mm × width b, 165 mm, and having openings of length c, 103 mm × width d, 115 mm.
In addition, the bottom plate was in the shape of a strip of 44 mm length × 90 mm width, and a crease was provided in the vertical center.
[Production of self-supporting microwave packaging container 100]
As shown in FIG.4 (c), the adhesive agent is apply | coated to the sticking board of the punched cardboard (blank), and the ventilation hole structure part of the flat soft packaging bag 10 for microwave ovens is cardboard on the inner surface side After being stored so as to be at the position of 20 openings, it was bonded with an adhesive plate to produce a self-supporting microwave packaging container 100 according to the present invention having the shape shown in FIG.
In a state where the flat soft package for microwave oven 10a was stored in the obtained sleeve 20 made of cardboard , the frozen package was stood on a tray in a microwave oven of 700 W output and heated for 7 minutes.
As a result, the self-supporting microwave packaging container 100 according to the present invention has an opening in the sleeve 20 made of cardboard, so that the entire microwave soft packaging 10a is stored in a paper box and sealed. The refrigeration efficiency was excellent.
In addition, as shown in FIG. 5A, the self-supporting microwave packaging container 100 according to the present invention is a microwave tray when it is frozen with its outer shape deformed like a conventional stand pouch type soft packaging bag. Even if the flat soft packaging body 10a for a microwave oven is not frozen in a flat shape, the self-supporting property is deteriorated, the stand pouch-type soft packaging bag does not fall over while rotating on the tray, and the microwave oven In a state where the flat soft packaging body 10a for use is accommodated in a sleeve 20 made of cardboard, the upper part of the sleeve-like cardboard 20 is cut along the opening cut line 7a, and the gusset portion M is opened to be stable. I was able to stand up.
And 4 to 5 minutes after starting heating the self-supporting microwave packaging container 100 with a microwave oven, the peeling corner of the overhanging portion of the flat soft packaging body 10a for the microwave oven peels off, and the unbonded portion is removed. Vapor quickly escaped from the through-hole via, and there was no spillage of the contents in an upright state, and there was no dirt in the microwave oven or around the tray.
Further, when taking out from the microwave oven, the flat soft package for microwave oven 10a is not directly touched by hand, and the portion of the sleeve 20 made of cardboard having a heat insulating effect can be held by hand, so there is a risk of burns or the like. The package could be safely removed.
In addition, the contents could be easily taken out from the bag by opening from the notch 13 of the flat soft package for microwave oven 10a with the sleeve 20 made of cardboard attached.
Furthermore, the flat soft package for microwave oven 10a according to the first embodiment is filled with miso soup with ingredients instead of the retort curry as a content, and then sealed, and the sleeve 20 made of cardboard according to the first embodiment is accommodated. As a result, the same effect as described above was obtained.

[Production of flat soft packaging bag 10 'for microwave oven]
(Preparation of laminated film for gusset part) First, after performing desired pattern printing with urethane resin gravure printing ink on one side of a biaxially stretched polyethylene terephthalate film (product name T4100, manufactured by Toyobo Co., Ltd.) having a thickness of 12 μm, Further, a resin layer (product name NWOP, manufactured by The Inktec Co., Ltd.) having a predetermined strength in a temperature environment below room temperature but having a predetermined strength reduced in a high temperature environment is a pattern as shown in FIG. Then, pattern coating was applied to a part of the upper side seal portion so as to have a thickness of 3 μm so as to cross from the inside to the outside of the packaging bag.
On the printing surface side, a two-component reactive polyurethane dry laminate adhesive is used to form a coating amount of 4 g / m 2 and a 15 μm thick biaxially stretched nylon film (product name ON, manufactured by Unitika) is dried. Bonded by a lamination method and formed on a surface of the biaxially stretched nylon film using a two-component reactive polyurethane dry laminate adhesive at a coating amount of 4 g / m 2, an unstretched linear low-density polyethylene having a thickness of 40 μm Film (product name SRWN, DNP techno film) was laminated by dry lamination method. As a result, layer structure, biaxially stretched polyethylene terephthalate film layer 12μm / printing layer / resin layer 3μm (partial coating) / dry laminate adhesive layer 4g / M 2 / biaxially stretched nylon film 15 μm / dry laminate adhesive layer 4 g / m 2 / unstretched polyp To prepare a laminate film are sequentially laminated pyrene film 60 [mu] m.
(Production of laminated film for body members)
Next, the layer structure, biaxially oriented polyethylene terephthalate film layer 12 μm / printing layer / dry laminate adhesive, in the same manner as the above bottom member, except that the resin layer (product name NWOP, manufactured by The Inktec) is not formed. A laminated film was prepared by sequentially laminating a layer 4 g / m 2 / biaxially stretched nylon film 15 μm / dry laminate adhesive layer 4 g / m 2 / unstretched polypropylene film 60 μm.
(Production of stand pouch)
Next, using the laminated film produced above, two laminated films of length 150 mm × width 160 mm as body members and one laminated film of length 90 mm × width 150 mm as gusset members were cut.
Then, the unstretched polypropylene film and the body member are overlapped so as to be the inner surfaces, the seal width is 10 mm, the side portions are heat-sealed to form a seal portion, and the unstretched polypropylene film constituting the gusset member Standing in which it is inserted in a folded state with the outer side facing out, the end is heat sealed to form a stand-pouch type bag, and a partial coat of the resin layer as the vent structure 30 is formed on one side of the bottom member A pouch was made.
[Fabrication of flat soft package 10'a for microwave oven]
The three-side sealed bag obtained above was filled with meat sauce (200 g / bag) from the opening, and the inside of the bag was heat-sealed and sealed. Thereafter, boil sterilization was performed at 90 ° C. for 60 minutes to obtain a flat soft package 10′a for microwave oven.
[Production of sleeve made of cardboard ]
Using a card paper having a basis weight of 310 g / m 2, a sleeve 20 made of thick paper as shown in FIG.
The above-mentioned sleeve 20 made of cardboard is composed of a front plate, a bottom plate, and a back plate, which are sequentially arranged via folding lines, so as to form folding lines with a punching machine and have the following dimensions. Punched out.
The front plate and the back plate had a length a, 155 mm × width b, 165 mm, and had an L shape having an opening of length c, 103 mm × width d, 115 mm.
In addition, the bottom plate was in the shape of a strip of 44 mm length × 90 mm width, and a crease was provided in the vertical center.
Furthermore, what laminated | stacked the polyethylene film (product name M-16P) with a thickness of 40 micrometers as an adhesive layer was used for a part of folding part of bottom material.
[Production of self-supporting microwave packaging container 100]
As shown in FIG. 4 (a), an adhesive is applied to the sticking plate of the punched cardboard (blank) 20, and the air hole structure portion 30 (resin) of the flat soft packaging body 10a 'for microwave oven is applied to the inner surface side. The container is formed so that the forming part) is positioned at the opening of the sleeve 20 made of cardboard, and is then bonded together with an adhesive plate, and the packaging container for a self-supporting microwave oven according to the present invention having the shape shown in FIG. 100 was produced.
In a state where the flat soft wrapping body 10a ′ for microwave oven was housed in the obtained sleeve 20 made of cardboard , the frozen packaging body was erected on a tray in a microwave oven with 700 W output and heated for 7 minutes.
As a result, since the self-supporting microwave packaging container 100 according to the present invention has an opening in the sleeve 20 made of cardboard, it is compared with the case where the entire microwave soft packaging body 10a 'is stored in a paper box and sealed. Thus, the refrigeration efficiency was excellent.
In addition, the self-supporting microwave packaging container 100 according to the present invention, when frozen with its outer shape deformed like a conventional stand-pouch-type soft packaging bag, becomes less self-supporting in the tray of the microwave oven. Even if the stand-pouch type soft packaging body does not fall while rotating on the tray, and the flat-shaped soft packaging body 10a 'for microwave oven is not frozen in a flat shape, the flat-shaped soft packaging body 10a for microwave oven Was able to stand up stably in a state of being stored in a sleeve 20 made of cardboard .
Then, 3 to 4 minutes after heating the flat soft package for microwave oven 10a ′ in the microwave oven, the resin forming part of the flat soft package for microwave oven 10a ′ peels off, and steam is quickly generated. There was no spillage of the contents when it was pulled out and stood up, and there was no dirt in the microwave oven or around the tray.
Further, when taking out from the microwave oven, the flat soft package for microwave oven 10a 'is not directly touched by hand, and the portion of the sleeve 20 made of cardboard having a heat insulating effect can be held by hand. And the self-supporting microwave packaging container 100 could be taken out safely.
Further, the contents could be easily taken out from the bag by opening from the notch 13 of the flat soft package for microwave oven 10a ′ with the sleeve 20 made of cardboard attached.
Furthermore, the flat soft package for microwave oven 10a 'according to the second embodiment is filled with curry roux instead of meat sauce as the contents, and sealed, and the result is that the sleeve 20 made of cardboard according to the second embodiment is stored. The same effects as described above were obtained.

Is a developed plan view illustrating the sleeves made of cardboard for accommodating a microwave flat flexible packaging bag according to the present invention. It is a top view which shows the flat soft packaging bag for microwave ovens which concerns on this invention. It is a front view of the packaging container for self-supporting microwave ovens of the state which accommodated the flat soft packaging bag for microwave ovens which concerns on this invention in the sleeve which consists of cardboard . It is the process schematic which mounts the flat soft packaging bag for microwave ovens which concerns on this invention to the sleeve which consists of cardboard . It is explanatory drawing for standing up in the state which accommodated the flat soft packaging bag for microwave ovens which concerns on this invention in the sleeve which consists of cardboard .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front plate 2 Bottom plate 3 Back plate 4 Adhesion plate 5 Adhesion plate 6 Adhesion plate 7 Edge seal part 7a, 7b Opening cut line (perforation)
8 Peeling corner portion 9 Overhang portion 10, 10 'Flat soft packaging bag 10a for microwave oven, 10a' Flat soft packaging body for microwave oven 11 Non-adhered portion 12 Cut (through hole)
13 Opening notch 14 Laminated film 15 Notched 20 Sleeve 22 made of thick paper Resin layer 23 Body member 24 Opening portion 25 Adhesive portion 30 Vent structure portion 100 Self-supporting microwave packaging containers L1, L2, L3, L4, L5, L6, L7, L8, L9, L10 Folding line M Gusset part

Claims (7)

A self-supporting microwave packaging container in which a flat packaging bag for microwave oven is housed in a sleeve made of cardboard, wherein the flat packaging bag for microwave oven is a vent structure part for venting steam by heating the microwave oven The sleeve made of cardboard has a folding line at the bottom of the front plate having a shape corresponding to the vent structure when the rectangular flat packaging bag for microwave oven is stored. A bottom plate having a rectangular shape that is connected to the bottom plate, and a back plate having the same shape as the front plate is provided symmetrically with the front plate through a fold line, and the bottom plate of the back plate is cut away. The front plate and the back plate have a sticking plate continuously provided on a side other than the side through a fold line, and the bottom plate is folded inward by a folded-back portion to form a gusset portion. Are bonded by the bonding plate, and the electronic And the outer surface of the flat flexible packaging bag Nji, the inner surface of the sleeve made of the cardboard, with each other separably autonomy electronic Nji packaging container, characterized in that in close contact with a non-adhesive state. A self-supporting microwave packaging container in which a flat packaging bag for a microwave oven is housed in a sleeve made of cardboard, wherein the sleeve made of cardboard is attached to the side (a) of the L-shaped front plate via a fold line A back plate having the same shape as the front plate provided symmetrically with the front plate, and a rectangular bottom plate connected to the side (b) of the front plate via a fold line, and the back plate A rectangular bottom plate connected to the side (b) via a broken line, and the side plate (e), the side (f) of the back plate and the bottom plate connected to the bottom plate via a broken line. The flat packaging bag for microwave oven has a vent structure for venting steam by heating the microwave oven at a position exposed outside when stored in the upper sleeve made of cardboard. The front plate, the back plate, and the bottom plate are bonded together by the adhesive plate, and the microwave oven And the outer surface of the flat flexible packaging bag, and the inner surface of the sleeve made of the cardboard, with each other separably freestanding microwave packaging container, characterized in that in close contact with a non-adhesive state. The self-supporting microwave packaging container according to claim 1 or 2 , wherein the sleeve made of cardboard closes the inner surfaces facing each other of the folded-back portion of the fold-like shape with an adhesive layer. . The flat soft packaging bag for a microwave oven is composed of a laminated film in which a heat-resistant base material layer and a sealant layer are laminated, and as a vent structure part for venting steam, from the upper edge seal part Overhanging the inside of the packaging bag, having an overhanging portion with the center side of the packaging bag as a peeling corner, an unbonded portion is provided in the overhanging portion, and at least the peeling corner in the unbonded portion The self-supporting microwave packaging container according to any one of claims 1 to 3 , wherein a cut or a notch is formed on the inner side of the planned peeling position. The flat flexible packaging bag for a microwave oven is composed of a laminated film in which a heat-resistant base material layer and a sealant layer are laminated, and a heat-resistant base material layer and a sealant layer are used as a vent structure for venting steam. A resin layer that has a predetermined strength in a temperature environment below room temperature but decreases in a predetermined temperature environment at a temperature environment lower than room temperature is formed on a part of the upper side seal portion from the inside to the outside of the packaging bag. 5. The self-supporting microwave packaging container according to claim 1 , wherein the packaging container is formed so as to cross. In the flat flexible packaging bag for a microwave oven, the height from the bottom to the top is 160 mm or less, and the ratio of the height to the width is 1: 0.7 to 1: 1.4. The self-supporting microwave packaging container according to any one of claims 1 to 5, wherein The packaging for a self-supporting microwave oven according to any one of claims 1 to 6, wherein the flat soft packaging bag for a microwave oven containing food to be cooked in a microwave oven is accommodated in a sleeve made of the cardboard. A self-supporting microwave packaging body, wherein the container is frozen.

Images