JP2002179154A - Packaging container for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container for a microwave oven, usable as a packaging container for contents including a liquid, which are stored in a packaging bag and which are heated by a microwave oven, capable of releasing steam without causing the bag to burst due to steam to be generated by heating and without allowing the liquid to leak from a steam release part and the like, and further capable of being easily handled with bare hands after heating. SOLUTION: The packaging container for heating by a microwave oven is composed of a bag and an outer case for storing the bag. The bag uses a composite film, of which at least one of the surfaces is formed out of a heat- sealing layer, and a lower member, in which a heat-sealing face is used as an upper face, and an upper member, on which a wing part is formed by sealing heat-sealing faces and in which the heat-sealing face is used as a lower face, are superposed on each other to heat-seal the circumferential parts of the lower and upper members, thereby forming the bag. The outer case storing the bag has a structure of capable of drawing the wing part outwardly and holding the top end of the wing part upwardly in heating. Further, the packaging container for the microwave oven includes a steam releasing means provided at the wing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container for a microwave oven, which can heat a packaged content.

[0002]

2. Description of the Related Art When food stored in a packaging bag is eaten by heating using a microwave oven, the bag becomes hot as the temperature of the contents rises, and it is difficult to hold the bag with bare hands and there is a risk of burns. is there. In addition, when food sealed in a packaging bag or the like is heated using a microwave oven, if the food is kept in a sealed system, the internal pressure in the system increases due to steam generated by heating, and the packaging bag eventually bursts. It is well known that the contents are scattered in the microwave oven. Various methods are known for preventing such a rupture of a bag or the like. For example, there is a method in which a part of the packaging bag is cut with scissors before heating in a microwave oven, or a hole is made in the packaging bag with a sharp-pointed object, followed by heating (JP-A-10-72070).
Also, a method of allowing a part of the bag to be made of a nonwoven fabric to allow steam to escape (Japanese Patent Application Laid-Open No. 9-240754) or providing a weak seal portion or a notch portion (Japanese Patent Application Laid-Open No. 9-142541,
10-95471).

[0003]

To solve the problem that the packaging bag heated by the microwave oven is hot and difficult to hold, a method of storing the packaging bag in an outer box has been disclosed (JP-A-2000-159).
277, JP-A-11-113740). However, these methods, in the case of heating, the bag is upright, that is,
It is heated in a microwave oven in a vertical position. Further, as a countermeasure when the formation of the steam escape port is forgotten in advance, a narrow steam escape portion is formed in the bag upper seal portion. In the method of storing the packaging bag in the outer box, the outer box is used so that it can be placed vertically.However, consumers may not always assemble properly, and the container may fall over, Objects will scatter and make the interior dirty. Also, in order to prevent rupture of the bag when the formation of the steam vent is forgotten, (1) Provide a special seal shape (Japanese Patent Laid-Open No. 2-8490).
8) (2) Notches are provided in the seal shape (Japanese Patent Laid-Open No. 10-9)
5471) (3) A method is disclosed in which a nonwoven fabric is provided in a part of a bag so that steam is released (Japanese Patent Laid-Open No. 9-240754). In these methods, the bag is used alone, and if the contents are fluid such as a liquid, the contents are spilled if the side seal portion is provided with a vapor vent. After heating, the pouch is hot and difficult to handle and may cause burns. In the method using a nonwoven fabric, the sealing property as a packaging bag cannot be obtained. An object of the present invention is to provide a packaging container for heating a content containing a liquid contained in a packaging bag, which is heated by a microwave oven, so that the vapor generated by the heating allows the vapor to be released without bursting the bag, and a liquid from a vapor release portion or the like. An object of the present invention is to provide a packaging container for a microwave oven that does not spill and that can be easily handled with bare hands after heating.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a container and packaging for heating by a microwave oven, comprising a bag and an outer box for storing the bag, wherein the bag has at least one surface formed of a heat seal layer. Using the composite film thus formed, the lower member having the heat sealing surface as the upper surface and the wing portion having the heat sealing surfaces sealed to each other, and the upper member having the heat sealing surface as the lower surface are overlapped, and the peripheral portion thereof is formed. Wherein the outer box has a structure capable of receiving the bag, pulling the wing portion of the bag outward when heating, and holding the tip of the wing portion upward. Packaging container. In addition, it is provided that a means for removing steam is provided in the wing portion.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a primary container for hermetically sealing and packing contents, a packaging bag made of a synthetic resin film and having a wing portion on one side, and an outer box as a secondary container for storing the packaging bag. And a combination of The wing portion is provided with a means for removing steam. When heating, the wing portion is taken out of the box and heated. And as a means of venting, a type that opens just before heating,
There are a type in which the safety device can avoid the breakage of the packaging bag even if the opening is forgotten, and a type in which the opening is automatically performed by the heat and pressure of the steam generated by microwave heating without opening before heating. Figure 1 is a diagram for explaining an embodiment of a microwave packaging container of the present invention, is a perspective view, cross-sectional view of (b) X ₁ -X ₁ part showing the external appearance at the time of heating (a) Microwave . FIG. 2 is an explanatory view of the microwave oven container of FIG.
(A) a perspective view showing an appearance during distribution, a (b) X ₂ -X ₂ parts cross section. FIG. 3 is a perspective view showing a state in which the outer box is opened and the bag is taken out. FIG. 4 is a development view of an embodiment of the outer box used in the present invention. FIGS. 5A and 5B are views showing an embodiment of the outer box used in the present invention. FIG. 5A is a perspective view showing (a) a distribution state, a wing part taking-out opening is formed, and (c) a state in which a wing part is set up. FIG. 6 is a view showing an embodiment of a bag in the packaging bag for a microwave oven according to the present invention, in which (a) a perspective view showing a sealed state,
(B) illustration of a member constituting the bag, which is (c) X ₃ -X _3. FIG. 7 is a view showing an example of steam release generated when the microwave packaging container of the present invention is heated. (A) When opening in advance, (b) Safety when heating in a sealed state Each example of the device (steam release), (c) another safety device at the time of heating in a sealed state, and (d) an automatic opening is shown. FIG. 8 is a cross-sectional view showing a material configuration example of a laminate forming a bag used in the packaging container for a microwave oven of the present invention.

[0006] The inventors of the present invention have found that there is no danger that the contents contained in a packaging bag, especially containing liquids, will be spilled when the contents are heated in a microwave oven. As a result of earnest research on packaging containers that do not cause the packaging bag to burst due to steam, a combined package consisting of a packaging bag in which the contents are sealed and an outer box for storing the packaging bag is shown in FIG.
As shown in (a) and FIG. 1 (b), the packaging bag 1 is provided with a wing portion 4 on one surface thereof, and a steam release means for discharging steam is added to the wing portion 4. The above problem can be solved by providing the outer box 10 with a structure that allows the wing portion 4 of the packaging bag 1 to be pulled out from the slit 14S provided in the outer box 10 and held above when heating the microwave oven. The present invention has been completed.

The outer box 10 of the packaging container W for a microwave oven according to the present invention is provided with a zipper portion 14 on a top surface 11 as shown in FIG. A slit 14S is formed on the top surface of the box, and when both sides of the slit are gripped and pulled to both sides, the cut line portion provided on the side surface is separated, as shown in FIG.
This is a box having a structure from which a packaging bag can be easily taken out, and blanks forming such a box are as shown in FIG. At the time of heating in a microwave oven, the packaging bag is once taken out of the outer box, the wing portion of the bag is raised and stored again in the outer box, and the opening is closed as shown in FIG. 1
As shown in (a), the wing portion can be projected above the outer box and held upward.

Further, as shown in FIG. 5 (a), the outer box has a shape capable of pinching a wing portion of a stored packaging bag and forming a slit portion which can hold both ends of the wing portion. A structure provided with perforations or the like from which an area (hereinafter, referred to as a window) can be cut out may be provided. FIG.
(B) shows a state in which the window is cut out, and the wing 4 of the packaging bag is exposed. Then, by pulling up the wing portion and inserting both ends thereof into the slit portion 14S having a small width, the wing portion 4 can be raised as shown in FIG. 5C.

Next, a packaging bag in the packaging container for a microwave oven according to the present invention will be described. As shown in FIG. 6 (a), the packaging bag 1 of the packaging container for a microwave oven according to the present invention has a bag provided with a wing portion 4 on one side of the bag and a microwave oven with the surface provided with the wing portion 4 as an upper surface. it can. The wing portion 4 is provided with an opening notch 9 for forming a steam escape port K. The vapor outlet K may be formed by another method. The packaging bag for a microwave oven according to the present invention includes the sub-sealing portion 6 and the steam releasing means 7 or 8 in the wing 4.
As shown in FIGS. 6B and 6C, the heat and pressure of the steam cause the seal portion of the auxiliary seal portion 6 to peel off and retreat.
The steam V may be provided with a safety device that disperses the steam V from the steam release means to the outside of the bag. Further, as shown in FIG. 6 (d), the opening may be made automatically by the heat and pressure of the steam generated by heating without forming the steam outlet K in advance.

FIG. 8 shows a packaging bag for a microwave oven according to the present invention.
As shown in (a), a bag is formed using a laminate 20 including at least a base material layer 21 and a heat seal layer 23.
Further, as shown in FIG. 8B, a laminate 20 in which an intermediate layer 22 is arranged between a base material layer 21 and a heat seal layer 23 may be used. In the laminate, each layer of the laminate constituting the laminate may be laminated via an adhesive layer 24 made of an adhesive or an adhesive resin.

The base layer 21 of the laminate 20 forming the packaging bag for a microwave oven of the present invention is not particularly limited as long as it is generally used as a food packaging material which is heated or cooked in a microwave oven. . For example, as the base material layer 21, a stretched polyethylene terephthalate film, a silica-deposited stretched polyethylene terephthalate film, an alumina-deposited stretched polyethylene terephthalate film, a stretched nylon film, a silica-deposited stretched nylon film,
Alumina evaporated stretched nylon film, stretched polypropylene film, polyvinyl alcohol coated stretched polypropylene film, nylon 6 / meta-xylylenediamine nylon 6 co-pressed stretched film or polypropylene /
Either an ethylene-vinyl alcohol copolymer co-pressed co-stretched film or the like can be used. The melting point of the base layer 21 is usually 150 ° C. or higher, and the thickness is 10 to 50 μm, preferably 10 to 30 μm.

The resin constituting the heat seal layer 23 in the present invention is not particularly limited as long as it is generally used as a food packaging material which is heated or cooked in a microwave oven. Examples of the heat seal layer 23 include low-density polyethylene, ultra-low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, undrawn polypropylene, ethylene-vinyl acetate copolymer, and ethylene-acrylic acid copolymer. Resins such as a copolymer, an ethylene-methacrylic acid copolymer, an ethylene-methyl acrylate copolymer, an ethylene-ethyl acrylate copolymer, an ethylene-methyl methacrylate copolymer and an ionomer can be used. The heat seal layer may be formed by extruding these resins by an extrusion lamination method.
As a film formed by a die method, an inflation method or the like, the film may be laminated with a heat-resistant base material layer by a dry lamination or an extrusion lamination method. The heat sealing layer 23 in the packaging material for a microwave oven according to the present invention.
Has a thickness of 20 to 100 μm, preferably 40 to 70 μm
It is.

The intermediate layer provided on the laminate 20 forming the packaging bag for a microwave oven of the present invention is used as a packaging material for the purpose of improving mechanical strength such as barrier properties and piercing resistance.
The intermediate layer is not particularly limited as long as it is generally used as a food packaging material that is heated or cooked in a microwave oven. Examples of the material used as the intermediate layer include those exemplified as the base material layer.

As described above, the packaging bag for a microwave oven according to the present invention is provided with a wing portion on one side of the bag, so that even if the packaging bag contains contents containing liquid, the wing portion can be heated when the microwave oven is heated. The bag can be placed horizontally with the side provided with. And by forming a steam escape port at the upper part of the wing portion, the bag can be stably and sufficiently heated without bursting the bag and without spilling the fluid food. Furthermore, even if the vapor escape port is forgotten in advance, the bag can be heated without bursting by the above-described safety device of the present invention. In addition, since the steam is automatically opened without forming a steam vent in advance, the steam can be directly heated.

As described above, the microwave packaging container of the present invention can be heated without being transferred to another container. Also, because there is an outer box, when you hold it by hand, it is not hot compared to heating the bag alone, it is easy to handle,
Moreover, there is no worry about burns and the like. Since the heating is performed in a flat (horizontal) state during the heating, the container does not fall and the contents are not scattered when the container is taken out or taken out of the container. And since a packaging bag has a wing part, it can respond to fluid foods, such as a liquid.

[0016]

EXAMPLE 1 A pouch (150 × 200 mm) as shown in FIG. 6 (a) was formed by dry-laminating a stretched nylon film having a thickness of 15 μm and a linear low-density polyethylene film having a thickness of 60 μm. Was prepared. 180 g of shark fin soup is put in this packaging bag, and FIG.
As shown in the box. Thereafter, as shown in FIG. 5B, the window was cut along the perforations. And
The wing part 4 of the packaging bag exposed there was picked out and inserted into the slit part 14S of the outer box so that the wing part rises. Prior to heating, as shown in FIG. 7 (a), the bag was torn from the opening notch 9 of the wing portion 4 to the tear prevention seal portion, thereby forming a steam escape port K. As a result of heating the packaging container with a 500 W microwave oven, as shown in FIG. 7D, steam V was gently released from the steam outlet K provided in the wing portion after about 2 minutes and 30 seconds. It was not so hot as the box was removed from the microwave, and the steam escaped from the top of the bag so there was no spillage of its contents.

Example 2 A bag (140 × 180 mm) same as that of Example 1 was prepared by using a packaging material in which an alumina-deposited polyethylene terephthalate film having a thickness of 12 μm, a stretched nylon film having a thickness of 15 μm, and an unstretched polypropylene film having a thickness of 60 μm were dry-laminated. Produced. However, a safety device as shown in FIG. 7A was provided in the wing. After 180 g of curry was put into this packaging bag and retorted, it was placed in an outer box as shown in FIG. Thereafter, the window of the outer box is opened along the perforation, the wing 4 of the packaging bag is taken out of the box, inserted into the slit 14S, and formed with a 500 W microwave without forming the steam outlet K. As a result of heating, after about 1 minute and 40 seconds, the steam V was gently released from the cut 7 ′ provided in the wing portion 4, so that the contents were not spilled over. .

[0018]

The microwave packaging container of the present invention can be heated by heating the microwave oven by placing the outer box containing the packaging bag sideways, so that the container does not fall in the refrigerator and the liquid leaks from the vapor release portion. Heating and unloading can be performed in a stable state. Furthermore, since the packaging bag can be heated and taken out while it is stored in the outer box, even when it is in a heated state, when the heated container is taken out of the microwave oven due to the presence of the outer box, it can be heated by hand. do not feel.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment of a packaging container for a microwave oven according to the present invention, in which (a) is a perspective view showing an appearance when a microwave oven is heated, and (b) is a cross-sectional view taken along a line X ₁ -X ₁ . .

[2] an explanatory view of a microwave container of FIG 1, a perspective view, (b) X ₂ -X ₂ parts cross-sectional view showing the external appearance at the time (a) distribution.

FIG. 3 is a perspective view showing a state in which an outer box is opened and a bag is taken out.

FIG. 4 is a development view of an embodiment of an outer box used in the present invention.

FIG. 5 is a view showing an embodiment of an outer box used in the present invention;
FIG. 7A is a perspective view showing a state in which a wing portion is set up when a wing portion outlet is formed at the time of distribution. FIG.

FIG. 6 is a view showing an embodiment of a bag in the packaging bag for a microwave oven according to the present invention, in which (a) a perspective view showing a sealed state, and (b).
Illustration of members constituting the bag, which is (c) X ₃ -X _3.

FIG. 7 is a view showing an example of steam release generated when heating the packaging container for a microwave oven of the present invention, wherein (a) when opened in advance, and (b) safety during heating in a sealed state. Examples of the device (steam release), (c) another safety device during heating in a sealed state, and (d) an automatic opening are shown.

FIG. 8 is a cross-sectional view showing a material configuration example of a laminate forming a bag used in the packaging container for a microwave oven of the present invention.

[Explanation of symbols]

 W Packaging container for microwave oven P Contents V Steam K Steam escape opening 1 Inner bag 2 Lower member 3 Upper member 4 Wing portion 5 Main seal portion 6 Secondary seal portion 7 Cutout portion, cutout portion 8 Opening means 10 Outer box 11 Top Surface 12 Bottom surface 13 Side surface 14 Zipper part 14T Zipper knob part 14S Slit 15 Cut line 16 Cut line 17 Fold line 18 Perforation 20 Laminate 21 forming packaging bag 21 Base layer 22 Intermediate layer 23 Sealant layer 24 Adhesive layer

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kozo Mita 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 3E067 AA04 AB01 AC01 BA06C BA13B BB01C BB14B BC06C CA17 EA06 EB06 EE48 FA04 FC01 GB02

Claims (2)

[Claims] 1. A container package for heating by a microwave oven, comprising a bag and an outer box for storing the bag, wherein the bag uses a composite film having at least one surface formed of a heat seal layer. The lower member having the heat sealing surface as the upper surface and the wing portion formed by sealing the heat sealing surfaces with each other, and the upper member having the heat sealing surface as the lower surface are overlapped with each other, and the periphery thereof is heat-sealed. A packaging container for a microwave oven, wherein the box has a structure in which the bag is housed, and when heated, the wing portion of the bag is pulled out and the tip of the wing portion can be held upward. 2. A packaging container for a microwave oven according to claim 1, wherein said wing portion is provided with means for removing steam.