JP2509475Y2 - Independent packaging with retort food - Google Patents

Description

TECHNICAL FIELD The present invention relates to a self-supporting package containing retort food.

2. Description of the Related Art Conventional technology and its problems Conventionally, a microwave permeable sheet made of a microwave permeable sheet has been developed as a self-supporting package for retort foods. The package is capable of warming the food in the package in a packaged state by microwave heating in a microwave oven. However, if the package is heated in a sealed state, the steam generated from the food increases the pressure inside the packaging bag. , High risk of bursting.

For this reason, in the conventional self-supporting package (21), the entire upper edge of the packaging bag (22) is torn and heated in a state where the upward opening (24) is formed before heating (Fig. 7). . However, the retort food (23) containing the liquid contained in the packaging bag (22), in particular, liquid foods such as meat sauce, Chinese sauce, and curry sauce are suddenly overheated due to microwave irradiation and bumping, There is a problem that a large amount of food (23) jumps out of the opening (24) and pollutes the inside of the microwave oven.

In order to solve this problem, the present applicant has previously proposed a self-supporting package for retort foods, in which a slit capable of forming a small-diameter vent hole by tearing is provided in the upper part of the package (Practical application Sho 62. -171492 specification). However, this package can prevent popping out due to bumping of the internal food in the microwave oven, but in order to take out the food from the package after heating, it is troublesome to further tear the upper part of the package to expand the opening. Was needed.

An object of the present invention is to solve the above problems and to provide a self-supporting package for a retort food containing a liquid, particularly a self-supporting package suitable for liquid food, which is used when microwave heating in a microwave oven. It is an object of the present invention to provide a self-supporting package containing a retort food, which can prevent the food from popping out due to bumping and can easily take out the food after heating.

Means for Solving the Problems The above object of the present invention is to provide a self-supporting retort food package in which a retort food is enclosed in a packaging bag made of a microwave permeable sheet, wherein the retort is provided on one side of the packaging bag. This is achieved by a self-supporting retort food package in which a food outflow opening is formed and a coating for sealing the opening is releasably attached to the entire outer surface of each side surface of the packaging bag.

The microwave permeable sheet constituting each side of the packaging bag is a resin film such as polyethylene terephthalate (PET), polyethylene (PE), vinylidene chloride (PVDC), eval (EVOH), polypropylene (PP),
For example, a structure in which a film having a high barrier property formed by vapor deposition of glass fiber or the like is laminated can be used.

The cover sheet may be releasably attached to the entire outer surface of each side surface and bottom surface of the packaging bag. Further, the covering sheet may be a microwave transparent sheet, for example, a sheet of the same material as the packaging bag, and a microwave impermeable sheet such as a retort pouch film formed by sticking an aluminum foil and a synthetic resin film. It may be a sheet.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a self-supporting package containing retort food according to an embodiment of the present invention. The package comprises a side sheet (1), another side sheet (2) facing the sheet, and a bottom sheet (3) inserted between the lower ends of these sheets (1) and (2). A bandage bag (5) having three microwave permeable sheets (FIGS. 2 and 3) is provided, and a retort food containing a liquid in the bandage bag, that is, a liquid such as meat sauce, Chinese sauce, curry sauce, etc. The food (A) is put therein, and a sealing portion (6) is formed by heat welding on the periphery of the sheets (1), (2) and (3). An opening (4) for taking out the liquid food (A) in the packaging bag (5) is provided on the upper surface of the one side sheet (1). The shape, diameter, etc. of the opening (4) are formed so as to correspond to the viscosity and other physical properties of the liquid food (A) and can be taken out in a good outflow state. Similar to the conventional packaging body, this packaging body is formed such that the lower end portion is expanded by the weight of the food in the packaging bag so as to be self-supporting.

Furthermore, in the packaging body according to the present embodiment, the opening (4) of the packaging bag (5) is sealed to cover the entire surface of the one-sided sheet (1).
A cover sheet (7) and a second cover sheet (8) that covers the entire surface of the other side surface sheet (2) are provided. These sheets (7) and (8) are the above-mentioned sheets (1) and (8), respectively. It is releasably attached by a known means to 2). In this embodiment, no cover sheet covering the bottom sheet (3) is provided, but a third cover sheet may be releasably attached to the bottom sheet (3). Further, the covering sheet has a size enough to seal the opening (4), and the one side sheet (1).
It may be releasably attached to.

The coating sheet, from the viewpoint that it can further improve the long-term storage stability of the food in the packaging bag, a high barrier property that does not allow or does not allow air and light to pass therethrough, and a material such as the retort pouch film as described above. It is more preferable if it is manufactured. If the covering sheet has microwave transparency, only the first covering sheet attached to the one side sheet (1) provided with the opening (4) is peeled off before microwave heating. do it. When the covering sheet is made of aluminum foil or the like that is impermeable to microwaves, it can be heated by microwaves, for example, as shown in FIGS. 2 and 3, on each side of the packaging bag. It is necessary to peel off all the applied covering sheets. Needless to say, the package can be warmed with hot water without peeling off the covering sheet.

Further, by peeling off the covering sheet (7) and opening the opening (4), outside air is introduced into the upper part of the inside of the package (5) through the opening, and the internal volume of the package in the self-supporting state increases,
The internal volume is before opening the opening (4), that is, 1.2 to the initial value.
It is formed to be 1.5 times. Here, the internal volume of the package increases from the beginning because, as in the case of the conventional package containing the retort food, the internal decompression is performed without being opened.

Next, the heating procedure of the self-supporting package containing the retort food thus configured will be described, including the time and effort required before and after heating.

As shown in FIGS. 2 and 3, as a preparatory process before heating, first, the first and second covering sheets (7) and (8) are peeled from the one side surface and the other side surface sheets (1) and (2). This causes the opening (4) at the top of the packaging bag to appear (fourth
Figure). In this state, the package is erected on the table in the microwave oven and heated by microwave irradiation. In this case, the opening (4) serves as a vent to the outside air, so that the pressure-induced expansion of the packaging bag (5) due to the steam generated from the heated food can be prevented.

Further, the liquid food (A) is rapidly heated by the microwave irradiation, and bursts and scatters in the packaging bag (5). However, as shown in FIG. 6, the opening (4) provided on the upper surface of the one side sheet (1) of the packaging body crosses the opening surface of the liquid food (A) with respect to the direction of the sudden boiling and scattering. Since it is provided in the facing direction, the food (A) is prevented from jumping out from the opening, and the inside of the microwave oven can be prevented from being contaminated to the minimum.

As described above, since the packaging body is formed so that the inner volume of the packaging bag (5) becomes 1.2 to 1.5 times the original volume due to the opening of the opening (4), it is formed in the upper portion of the packaging bag. The created space has the following effects. That is, when the food (A) is suddenly boiled due to microwave heating, the food is effectively prevented from jumping out of the bag through the opening (4), and the convection of steam generated from the food in the bag is effective. Correct,
Thereby, the food (A) can be efficiently heated. If the internal volume is more than 1.5 times, the package is undesirably handled and unnecessarily bulky.

Further, since the food (A) is taken out after heating, the shape and diameter of the opening (4) are provided in correspondence with the food (A).
As shown in FIG. 5, it is sufficient to incline the packaging body as it is and let the food inside flow out into the container (B) through the opening (4). In addition, there is no need to manually tear the upper part of the packaging bag or cut with scissors.

Microwave oven (output 500W) using the package of the present invention and the conventional package of the same size except for the configuration of the opening and the covering sheet.
Table 1 shows the results of measuring the amount of bumping and splashing of the liquid food based on the microwave irradiation (2 minutes). Water vapor (2.3 g) was excluded from the amount of bumping and scattering. It should be noted that 15 in each packaging bag
In a conventional package, 0 g of a liquid food was put, and the upper edge of the packaging bag was cut and measured as shown in FIG.

As is clear from Table 1, in the packaging body of the present invention, the amount of bumping and splashing of food in the packaging bag is 1 / th that of the conventional packaging body.
Extremely low at 20. Therefore, it was confirmed that the package of the present invention is effective in preventing the bumping and scattering of food when heated by microwave irradiation.

Next, Table 2 shows various retort foods
The following shows the results of measurement of the time required from preparation to removal of the food after heating in the package containing 150g). As shown in Table 2, the package of the present invention requires the least amount of time and effort for heating and cooking, and thus the required time is the shortest.

Next, the shape and diameter of the opening provided in the packaging bag of the package of the present invention were variously changed, and the outflow state when the heated liquid food (including solid matter) was taken out of the package was examined. Hereinafter, Experimental Examples 1 to 3 will be shown.

The following three types of liquid foods were used in Experimental Examples 1 and 2, and the value of the viscosity (liquid temperature 40
C) was as follows.

Curry sauce …… 2000 cps Meat sauce …… 3000 cps Chinese sauce …… 1000 cps Experimental example 1 Aperture shape [True circle] From the results of this Experimental Example 1, when the shape of the opening is a perfect circle, the Chinese sauce having a relatively low viscosity gives good outflow even when the opening diameter is about 10 mm, whereas the meat sauce having a viscosity higher than that of the Chinese sauce is about 10 mm. 20mm opening diameter, curry sauce is about
It has been found that each requires an aperture diameter of 30 mm. It is believed that the above results are also affected by the size and amount of solids present in these sources.

Experimental Example 2 Aperture shape [regular triangle] From the results of Experimental Example 2, when the shape of the opening is an equilateral triangle,
It was confirmed that the curry sauce with relatively large viscosity and mixed solids shows a good outflow condition when the height of the equilateral triangle is 20 mm to 30 mm.

Next, in Experimental Example 3, the change in the outflow state based on the change in the viscosity of the curry sauce was examined. The shape of the opening provided in the packaging bag is perfect circle (diameter 30mm) and regular triangle (height 30m)
The experiment was carried out in each case of m). Incidentally, the adjustment of the viscosity of the curry sauce, a thickener, for example corn starch,
Various starches such as horse starch and wheat starch, modified starches and various gums were used alone or in combination.

Experimental example 3 From the results of Experimental Example 3, the viscosity of the curry sauce (liquid temperature 40
℃) 2000 ~ 3000cp when the opening shape is perfect circle
It was found that 2000-5000 cps is suitable for s and equilateral triangle.

EFFECTS OF THE INVENTION As is apparent from the above, in the self-supporting package containing the retort food according to the present invention, an opening is provided in one side upper part of the microwave permeable packaging bag capable of standing, and the opening is a peelable covering sheet. It is sealed by. Therefore,
The opening opened by peeling off the covering sheet is formed such that the opening surface is in a direction transverse to the direction in which the retort pouch is blown and scattered in the self-supporting state of the package. For this reason, when heating in a microwave oven, it is possible to minimize the possibility that the retort food that has been blown and splashed out of the packaging bag through the opening and contaminates the inside of the microwave oven. As described above, the self-supporting package of the present invention is particularly suitable for liquid foods that are likely to be blown and scattered.

Further, the packaging body, in the state where the opening is opened by peeling the covering sheet, is formed so that the internal volume of the packaging bag is 1.2 to 1.5 times the initial volume in the self-supporting state, and therefore, from the internal food during heating. The generated water vapor effectively forms convection in the packaging bag, which allows the food to be efficiently heated. Further, when the internal food is taken out after heating, since the opening is formed to have a size capable of allowing the food in the packaging bag to flow out, it can be simply carried out by simply tilting the packaging bag. There is no need to cut and open the upper part of the packaging bag like the body.

[Brief description of drawings]

FIG. 1 is a perspective view showing a package according to one embodiment of the present invention,
FIG. 2 is a perspective view showing a state in which the cover sheet is peeled off from the package, FIG. 3 is a vertical sectional view of FIG. 2, and FIG. 4 is a perspective view showing a state in which the cover sheet is peeled off from the packaging bag. FIG. 6 is a perspective view showing a state of taking out food after heating, FIG. 6 is a perspective view showing an example of bumping and scattering state of food during microwave heating, and FIG. 7 is food in a conventional package during microwave heating. It is a perspective view which shows an example of a bumping and scattering state. (1) …… One side sheet (2) …… Other side sheet (3) …… Bottom sheet (4) …… Opening (5) …… Packaging bag (6) …… Sealing part (7) …… No. 1 coating sheet (8) …… second coating sheet (A) …… liquid food

Claims (2)

(57) [Scope of utility model registration request] 1. A self-supporting retort food package in which a retort food is enclosed in a packaging bag made of a microwave permeable sheet, wherein the retort food outflow opening is formed on one side surface of the packaging bag. A self-supporting retort food package, wherein a coating for sealing the opening is peelably attached to the entire outer surface of each side surface of the packaging bag. 2. The self-supporting retort food package according to claim 1, wherein the coating for sealing the opening is a microwave impermeable sheet.