JP2013028353A - Packaging material for microwave oven cooking - Google Patents

Abstract

Packaging for microwave oven cooking in which contents can be added before and after cooking in a microwave oven and sufficient internal pressure can be applied during cooking without damaging the packaging material. Providing materials.
A microwave cooking packaging material that is stored in a microwave oven in a self-supporting state and cooks contents, and the microwave cooking packaging material includes a first side film, a second side film, and a second side film. It has a side film, a bottom film, and an intermediate film, and has a vapor passage section that releases pressure when the internal pressure rises due to heating. The first side film is provided with a material input hole. The first side film and the intermediate film are detachably connected to each other via a detachable part, and the intermediate film is sandwiched between the first side film and the second side film at the upper end. And a microwave oven packaging material characterized by being integrally joined together.
[Selection] Figure 1

Description

  The present invention relates to a microwave cooking packaging material. More specifically, it is a packaging material that can hold the contents that have undergone high-temperature sterilization such as retort sterilization, and the contents can be added without damaging the packaging material before cooking with a microwave oven. The present invention relates to a microwave cooking packaging material that can be applied and can provide a sufficient internal pressure during cooking.

  Conventionally, in packaging materials enclosing contents that have undergone high-temperature sterilization such as retort sterilization, the internal pressure increased during range cooking in order to prevent the internal pressure from rising and bursting when cooking with a microwave oven. A steam hole is provided for releasing the gas (see, for example, Patent Document 1).

  However, although the packaging material described in Patent Document 1 can prevent bursting and the like during cooking, there is a problem that contents cannot be added before cooking in a microwave oven. If, for example, the joint is opened to add contents before cooking in the microwave oven, sufficient pressure cannot be applied to the inside of the packaging material during cooking in the microwave oven. There is a problem that becomes insufficient.

JP 2000-185777 A

  The present invention has been made in view of such conventional problems, and it is possible to add contents before and after cooking by heating in a microwave oven, and it is sufficient when cooking without damaging the packaging material. It aims at providing the packaging material for microwave oven cooking which can provide a certain internal pressure.

The packaging material according to the present invention is stored in a microwave oven in a self-supporting state, and is a microwave oven packaging material for cooking the contents,
The microwave oven packaging material has a first side film, a second side film, a bottom film, and an intermediate film, and at least releases pressure when the internal pressure increases due to heating. Has one steaming section,
The first side film is provided with a material input hole,
The first side film and the intermediate film are detachably connected via a detachable part,
The intermediate film is characterized in that an upper end portion is sandwiched and integrally joined by the first side film and the second side film.

  By having such a configuration, the present invention can add contents before cooking by heating in a microwave oven, and gives sufficient internal pressure during cooking without damaging the packaging material. It is possible to provide a packaging material for cooking a microwave oven.

  The material input hole is preferably provided by dividing the first side film into an upper film and a lower film.

  By having such a configuration, since the material charging hole can be provided on the side surface, it is possible to prevent the vapor from escaping from the material charging hole when internal pressure is applied.

  The desorption part is formed below the material input hole when the microwave cooking packaging material is made to stand by itself, and is 2 minutes of the height when the microwave cooking packaging material is made self-supporting. It is preferable to be provided at a position higher than 1.

  By having such a configuration, it is easy to throw in the material, the contents are not easily spilled during microwave cooking, and the internal pressure can be remarkably prevented from leaking.

  The steaming part is preferably a through-hole provided in at least one of the first side film or the second side film.

  By having such a configuration, it is possible to reliably discharge the steam, so that it is possible to prevent rupture caused by excessive increase in internal pressure.

Also, the steaming part is an unjoined part between the first side film and the second side film,
Among the side seal portions formed by joining the first side film and the second side film, is the weak seal portion having a weak seal strength,
Is the weak seal portion formed by inserting an easily peelable film between the first side film and the second side film,
The junction between the first side film and the second side film may have an irregular seal structure.

  By adopting these configurations, when cooking with a microwave oven, bursting and the like can be more reliably prevented, and various product variations can be accommodated.

  It is preferable that the food after high temperature sterilization is enclosed.

  In the conventional packaging material that holds these foods, it is not possible to add contents before and after cooking with a microwave oven, but by holding the packaging material according to the present invention, from the above-mentioned material input hole By adding ingredients, for example, ingredients can be added to foods such as soup and seasonings can be added, and the taste of the user can be more reflected.

  According to the present invention, the contents can be added before cooking with a microwave oven, and a sufficient internal pressure can be applied during cooking without damaging the packaging material. A packaging material for cooking can be provided.

Explanatory drawing of the packaging material for microwave oven cooking concerning one Embodiment (Embodiment 1) of this invention A-A 'side end view of a microwave cooking packaging material according to one embodiment (first embodiment) of the present invention B-B 'side end view of microwave oven packaging material according to one embodiment (first embodiment) of the present invention Explanatory drawing explaining the state to which the internal pressure at the time of cooking using the packaging material for microwave oven cooking concerning one Embodiment (Embodiment 1) of this invention was added.

(Embodiment 1)
Hereinafter, microwave packaging material 1 according to the present embodiment will be described with reference to the drawings. Drawing 1 is an explanatory view of packaging material 1 for microwave oven cooking concerning this embodiment. FIG. 2 is an AA ′ side end view of the microwave cooking packaging material 1 according to the present embodiment. FIG. 3 is a BB ′ side end view of the microwave cooking packaging material 1 according to the present embodiment. FIG. 4 is an explanatory diagram illustrating a state in which an internal pressure is applied when cooking using the microwave cooking packaging material 1 according to the present embodiment.

  As shown in FIG. 1 and FIG. 2, the microwave cooking packaging material 1 according to the present embodiment is stored in a microwave oven in a self-supporting state, and the microwave cooking packaging material for cooking the contents C by heating. 1, the microwave cooking packaging material 1 has a first side film 2, a second side film 3, a bottom film 4, and an intermediate film 5, and the internal pressure is increased by heating. The first side film 2 is provided with a material injection hole 7, and the first side film 2 and the intermediate film 5 are: The intermediate film 5 is detachably connected via the detachable portion 8, and the intermediate film 5 is integrally joined with the upper end portion being sandwiched between the first side film 2 and the second side film 3. It is characterized by that. Each configuration will be described below.

<About the first side film 2>
The first side film 2 will be described. As shown in FIG. 1, the first side film 2 is a film provided with a material insertion hole 7, and is bonded to a second side film 3, a bottom film 4, and an intermediate film 5, which will be described later. It is a film which forms the exterior of the packaging material 1 for cooking a range. In this way, the packaging material 1 for cooking the microwave oven having the exterior is filled with the contents C (food) in advance, and the contents C are subjected to high-temperature sterilization such as retort sterilization. The microwave cooking packaging material 1 according to the present embodiment, in which the contents C subjected to high temperature sterilization such as retort sterilization are enclosed, is purchased by the user and cooked by the microwave oven.

  The configuration of the first side film 2 is not particularly limited as long as it is a film that can withstand high-pressure sterilization treatment such as retort sterilization, and may be a laminate of two or more layers. The material of the film is not particularly limited, and any material used as a packaging material can be used as the material of the outermost base material layer. For example, polyester such as PET, polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefin such as polyethylene (PE) and polypropylene (PP), polyamide (PA) such as nylon-6 and nylon-66, polycarbonate ( Stretched or unstretched films such as PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), ethylene-bunyl alcohol copolymer (EVOH), nylon-6 / It may be a metaxylylenediamine nylon 6 coextruded film, a polypropylene / ethylene-vinyl alcohol copolymer coextruded film, or a composite film obtained by laminating two or more of these films. In the present embodiment, the first side film 2 in which PET having a thickness of 12 μm is laminated on unstretched polypropylene (CPP) having a thickness of 60 μm is used.

  As a method for laminating each film, for example, a known method such as a dry lamination method, a non-solvent dry lamination method, an extrusion lamination method, and a sandwich lamination method using the extrusion lamination method can be used.

  For example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant can be added to the first side film 2, and they are appropriately added as necessary. Although the thickness of the 1st side surface film 2 is not specifically limited, It is preferable that it is the range of 10 micrometers-300 micrometers from a workability and a physical property surface.

  The material charging hole 7 will be described. The material charging hole 7 is a hole provided in the first side film 2. The method for providing the material input hole 7 is not particularly limited. In addition to the case where the first side film 2 is provided with a through hole, the first side film 2 is formed of the upper film 2a and the lower film as shown in FIG. It divides into 2b, and it is good also considering the divided | segmented area | region as the material injection | throwing hole 7. FIG. In this case, the upper end portion of the upper film 2a is joined to the second side film 3 described later via the intermediate film 5 described later, and the lower film 2b is connected to the intermediate film 5 described later via the desorption portion 8 described later. Removably connected. Since the material charging hole 7 is thus provided, the user purchases the microwave cooking packaging material 1 according to the present embodiment that has been subjected to retort sterilization in a state in which the contents C are enclosed, and has already been provided. A material or the like can be added to the enclosed contents C. In this case, the content C is, for example, a soup after retort sterilization, and the additional materials are, for example, ingredients such as vegetables and seasonings.

  As shown in FIG. 3, the first side film 2 is provided with a vapor passage section 6 in the vicinity of the junction with the intermediate film 5 and the second side film 3. By providing in such a position, when cooking in a microwave oven, the liquid leakage of the contents C and the scattering of the liquid can be prevented. When the internal pressure reaches a predetermined pressure or higher when the internal pressure rises due to heating during cooking of the microwave cooking packaging material 1 according to the present embodiment in the microwave oven 6 It is provided only to communicate with the internal pressure and release the internal pressure.

  The structure of the steaming part 6 is not particularly limited, and a structure in which a plurality of fine through holes are provided, or the unjoined part between the first side film 2 and the second side film 3 is used as the steaming part 6. Among the side seal portions formed by bonding the first side film 2 and the second side film 3 to the structure, the weak seal portion having a weak seal strength is used as the steaming portion 6, or the first A structure in which a weakly sealed portion formed by inserting an easily peelable film between the side film 2 and the second side film 3 is used as a steaming portion 6, or the first side film 2 and the second side film 3 It is possible to adopt a structure in which the joint portion is a vapor seal portion 6 with a deformed seal structure. In the case of adopting a structure in which the unjoined portion between the first side film 2 and the second side film 3 is used as the steaming section 6, the first side film and the second side film are, for example, a heat sealer. It can be formed by forming a part (unsealed part) that is not intentionally sealed when joining by, for example. Moreover, the weak seal part with weak seal | sticker intensity | strength can also be formed by adjusting the temperature, time, and frequency | count of heat sealing. Furthermore, for example, by inserting a heat-sealing film by inserting a film having a thickness of about 30 μm containing mainly a polyethylene resin as a main component, for example, various waxes such as silicon resin and polyethylene wax, and nitrified cotton as an easily peelable film. It can also be a weak seal. In the microwave cooking packaging material 1 according to the present embodiment, the assembly of fine through holes of about 0.1 μm to 2 mm is used as the steaming section 6. By having such a structure, the internal pressure can be released only when the internal pressure of the packaging material 1 for microwave oven cooking according to the present embodiment reaches a predetermined pressure or higher during microwave cooking, Cook while applying sufficient pressure.

<About the second side film 3>
The second side film 3 will be described. As shown in FIG. 2, the second side film 3 is joined to the first side film 2 (the upper film 2a of the first side film 2 in FIG. 2) via the intermediate film 5, and the bottom surface It is a film which forms the exterior of the packaging material 1 for microwave oven cooking concerning this Embodiment with the film 4. FIG. As the configuration and material of the second side film 3, the same configuration and material as those of the first side film 2 can be selected. In the present embodiment, the second side film 3 in which PET having a thickness of 12 μm is laminated on CPP having a thickness of 60 μm is used.

<About the bottom film 4>
The bottom film 4 will be described. As shown in FIG. 2, the bottom film 4 is a film that is joined to the first side film 2 and the second side film 3 and forms an exterior of the microwave cooking packaging material 1 together with the intermediate film 5. is there. As the configuration and material of the bottom film 4, the same configuration and material as those of the first side film 2 and the second side film 3 can be selected.

  As shown in FIG. 1, the bottom film 4 is a flat state folded in a state where the contents C are not enclosed, but the contents C are enclosed as shown in FIG. Then, the legs of the first side film 2 and the legs of the second side film 3 are spread so as to be substantially parallel to the ground surface so that the microwave cooking packaging material 1 can stand on its own.

<About the intermediate film 5>
The intermediate film 5 will be described. As shown in FIGS. 2 and 3, the intermediate film 5 is joined so that the upper end is sandwiched between the first side film 2 and the second side film 3. The exterior of the packaging material 1 for microwave oven cooking concerning this form is formed.

  As the configuration and material of the intermediate film 5, the same configuration and material as those of the first side film 2 can be selected. In the present embodiment, an intermediate film 5 is used in which PET having a thickness of 12 μm is laminated on CPP having a thickness of 30 μm and further CPP having a thickness of 30 μm is laminated. In this way, by adopting a structure in which PET is sandwiched between CPPs, the film surfaces bonded to the first side film 2 and the second side film 3 are both CPP, and the bonding accuracy is improved. preferable. The thickness of the intermediate film 5 is not particularly limited, but is preferably in the range of 50 μm to 100 μm from the viewpoint of processability and physical properties.

  As shown in FIG. 2 and FIG. 3, the intermediate film 5 is connected to the first side film 2 (lower film 2 b) via the desorption part 8.

  The structure of the detachable part 8 is not particularly limited, but a chuck structure can be adopted. As the chuck structure, for example, one of the intermediate film 5 or the first side film 2 is provided with an engaging convex portion formed in a ridge shape, and the other is provided with an engaging concave portion provided in a valley shape, and these are fitted. A structure to be combined can be adopted. By adopting such a chuck structure, after purchasing the microwave cooking packaging material 1 according to the present embodiment, the user opens the detachable portion 8 regardless of whether the microwave oven is cooked or not, and opens the material charging hole described above. 7 can add material additionally. The user can add the ingredients and then close the detachable portion 8 again to prepare for cooking by the microwave oven.

  The detachable part 8 is formed below the material charging hole 7 when the microwave cooking packaging material 1 according to the present embodiment is self-supporting, and makes the microwave cooking packaging material 1 self-supporting. It is preferable to be provided at a position higher than one half of the height at the time. By adopting such a configuration, it is easy to throw in the material, the contents C are not easily spilled during microwave cooking, and the internal pressure can be remarkably prevented from leaking out. That is, as shown in FIG. 4, when the internal pressure rises during cooking in the microwave, the microwave cooking packaging material 1 according to the present embodiment expands. In that case, since the desorption part 8 is provided between the intermediate | middle film 5 and the 1st side film 2, the path | route through which the content C leaks from the desorption part 8 is interrupted | blocked when internal pressure rises. It will be. Thereby, it can prevent effectively that the content C leaks from the desorption part 8 in the case of microwave oven cooking.

  The microwave cooking packaging material 1 according to the present embodiment can be additionally charged by the user, but the number of times of charging is not limited. That is, when foods such as vegetables are additionally input, it is possible to adjust the input order and input time of the vegetables that are likely to be boiled and the vegetables that are not easily generated. Thereby, a more various cooking method is employ | adopted and the free cooking reflecting a user preference can be performed. And since the removal | desorption part 8 can be opened and closed repeatedly, it is not necessary to open the microwave-cooking packaging material 1 itself irreversibly with scissors. Furthermore, since the cooking can be completed from the start of cooking only with the microwave oven, for example, it is not necessary to transfer the contents C to another tableware (such as a pan or a dish), which is convenient.

  In addition, after cooking is completed, it may be opened with scissors or the like, and when a cut or the like is provided in the first side film 2 or the like in advance, it is opened by such a cut or the like and the content after cooking is taken out. Good.

  As mentioned above, according to the packaging material 1 for microwave oven cooking concerning this Embodiment, addition of the content etc. is possible before and behind cooking with a microwave oven, and it is cooking without damaging a packaging material The packaging material 1 for microwave oven cooking which can provide sufficient internal pressure sometimes can be provided.

  According to the microwave cooking packaging material according to the present invention, it is possible to add contents before and after cooking with a microwave oven, and to provide a sufficient internal pressure during cooking without damaging the packaging material. The packaging material for microwave oven cooking which can be provided can be provided.

DESCRIPTION OF SYMBOLS 1 Packaging material for microwave oven 2 1st side film 2a Upper film 2b Lower film 3 2nd side film 4 Bottom film 5 Intermediate film 6 Steaming part 7 Material input hole 8 Desorption part

Claims (9)

A packaging material for cooking in a microwave oven that is housed in a microwave oven in a self-supporting state and cooks the contents,
The microwave oven packaging material is:
Having a first side film, a second side film, a bottom film, and an intermediate film;
It has at least one steaming part that releases pressure when the internal pressure rises due to heating,
The first side film is provided with a material input hole,
The first side film and the intermediate film are detachably connected via a detachable part,
The intermediate film has a top end portion sandwiched between the first side film and the second side film, and is integrally joined to the intermediate film.   The packaging material for microwave oven cooking according to claim 1, wherein the material input hole is provided by dividing the first side film into an upper film and a lower film.   The desorption part is formed below the material charging hole when the microwave cooking packaging material is self-supporting, and is 2 minutes of the height when the microwave cooking packaging material is self-supporting. The packaging material for microwave oven cooking according to claim 1 or 2, wherein the packaging material is provided at a position higher than 1.   The packaging material for microwave cooking according to any one of claims 1 to 3, wherein the steaming part is a through-hole provided in the first side film.   The microwave oven packaging material according to any one of claims 1 to 4, wherein the steaming part is an unjoined part between the first side film and the second side film. .   2. The steaming portion is a weak seal portion having a weak seal strength among side seal portions formed by joining the first side film and the second side film. The packaging material for microwave oven cooking of any one of -5.   The said steaming part is a weak seal part formed by inserting an easily peelable film between the said 1st side film and the said 2nd side film, The any one of Claims 1-6 characterized by the above-mentioned. The packaging material for microwave oven cooking of Claim 1.   The microwave oven cooking according to any one of claims 1 to 7, wherein the steaming part has a deformed seal structure at a joint part between the first side film and the second side film. Packaging materials.   The microwave cooking packaging material according to any one of claims 1 to 8, wherein the food after high-temperature sterilization is enclosed.

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