JP3003622B2 - Package for microwave oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for a microwave oven, in which an article to be cooked can be heated and cooked in a microwave oven.

[0002]

2. Description of the Related Art Heretofore, an article to be cooked in a pouch by a packaging bag is limited to a cooking method using hot water heating, and when a microwave oven is used, the internal pressure rises due to moisture evaporated from the article to be cooked during heating and cooking. As a result, the packaging sheet may expand like a balloon and burst.

Therefore, when cooking in a microwave oven,
It is necessary to devise a way to allow the vapor to escape without leaking liquid. Therefore, conventionally, a check valve has been attached to the packaging bag, or a part of the packaging bag has been cut with scissors immediately before cooking.

[0004]

However, when a check valve is used, the function is incomplete or the cost is high, and it has not been widely used. In addition, there is a possibility that the liquid product may be boiled and spilled.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and efficiently discharges steam generated from an article to be cooked when cooking by heating in a microwave oven, and prevents leakage of the article to be cooked. An object of the present invention is to provide an inexpensive package for a microwave oven that can be prevented.

[0006]

The technical means taken by the present invention to solve the above-mentioned problem is a package having a back-sticking portion 8c formed by bonding the inner surfaces of a pair of wrapping sheets 5 which are superposed. In the package for a microwave oven in which the article to be cooked 3 is stored in the bag 1, the back bonding portion 8c has a first passage 10 communicating with the storage space 9 and a back bonding from a position above the first passage 10. A steam passage 7 comprising a second passage 11 extending in the longitudinal direction of the portion 8c is formed, the second passage 11 is configured to be openable, and a second passage is formed with respect to the first passage 10.
11 has become narrow .

Therefore, when the article to be cooked 3 is heated in a microwave oven, the steam generated from the article to be cooked 3 is discharged to the outside through the open flow passage 7. Further, since the packaging bag 1 is inflated by the vapor and the flow path 7 is located above, the liquid hardly enters the flow path 7, and the liquid can be prevented from leaking through the flow path 7. .

The first passage 10 has a length equal to the length of the back adhering portion 8c.
Preferably, it is located substantially at the center in the hand direction .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a packaging bag for packaging an article to be cooked 3 such as chilled food or frozen food, and the packaging bag 1 is based on a plastic film such as biaxially stretched polyester or biaxially stretched polyamide. It is made of a known packaging sheet 5 such as a material in which a heat-fusible resin such as polyethylene or polypropylene is laminated on the innermost layer. In addition, as the to-be-cooked product 3, for example, various foods such as oden with dashi, pork stew with sauce, hemp figure tofu, rice bowl, grilled meat with sauce, curry stew, soup and the like can be mentioned.

[0010] The packaging bag 1 is provided with edges 8 on both sides of the sheet 5.
This is a so-called pillow-packaged form in which a bag is formed in a hermetically sealed shape by heat-sealing a, 8b, and the upper back bonding portion 8c. Note that the packaging bag shown in FIG. 1 is a packaging bag formed by heat-sealing the sheet 5 in an empty state where the article to be cooked 3 is not stored.

Reference numeral 7 denotes a vapor passage formed in the back affixing portion 8c, which communicates with a housing space 9 for housing the article 3 to be cooked in the packaging bag 1. That is, the steam passage 7 is formed by leaving a non-sealed portion when the ends of the packaging sheet 5 serving as the back affixing portion 8c are heat-sealed to each other in a sealed manner. Large first passage 10 and small width second communicating with
And a passage 11.

The first passage 10 is located substantially at the center of the back pasting portion 8c in the longitudinal direction, and its width L1 is approximately 1/3 of the length L (corresponding to the length of the packaging bag 1) of the back pasting portion 8c. Is set to Further, the second passage 11 is moved from the position above the first passage 10 to the back adhering portion 8c.
Extending along the longitudinal direction (lateral direction) of the
Is approximately half the width L1 of the first passage 10 (for example, 2 to 10
mm).

Reference numeral 13 denotes a V-shaped notch formed on the upper edge of the back pasting portion 8c so that the back pasting portion 8c can be broken in the width direction. The second passage 11 of the passage 7 can be opened. Reference numeral 15 denotes a notch for a stopper formed at a position opposite to the notch 13 with respect to the second passage 11 and in a direction orthogonal to a breaking direction of the back pasting portion 8c. The stopper notch 15 may be of various shapes as shown in FIG.

Next, the article to be cooked 3 packed in a package
Is cooked in a microwave oven.

First, when the back pasting portion 8c is cut from the notch 13, the breaking line crosses the tip of the second passage 11 of the steam passage 7, so that the second passage 11 is opened. In addition, this back paste part 8c
Is broken only until the break line reaches the notch 15 for the stopper, and even if the back stuck portion 8c is broken strongly, it is broken to the side of the packaging bag 1 that contains the food 3 by mistake. You won't.

Further, when the packaging bag 1 having the vapor passage 7 opened is put in a microwave oven to cook the article to be cooked 3 (FIG. 2).
(See (a)), the microwave generated from the microwave oven is absorbed in the article to be cooked 3, and the article to be cooked 3 is heated. During this heating, the liquid in the article to be cooked 3 becomes steam, the pressure in the packaging bag 1 rises and the packaging bag 1 expands, and the steam pushes and expands the steam passage 7, and the first passage 10 and the second passage 11. (See FIGS. 2B and 3). At this time, since the second passage 11 is formed to have a small width, the first passage
The 10 and the second passage 11 will expand appropriately.

Further, even if the cooked product 3 is boiled during the heating cooking, the steam passage 7 is located above the cooked product accommodating space 9 and at the highest position when expanded. In addition, the liquid of the article to be cooked 3 does not easily enter the steam passage 7. Even if the liquid enters the first passage 10 of the vapor passage 7, the second passage 11 is smaller in width than the first passage 10 and faces sideways at a position above the first passage 10. Thus, there is little risk of leakage to the outside through the second passage 11, and the inside of the microwave oven is hardly contaminated.

Furthermore, even after cooking, FIG.
As shown in (b), in the pressurized packaging bag 1, it is possible to stably continue the boiling state of the article to be cooked 3, and not only heat and thaw, but also stew and cook with a pressure cooker. Such effects can be obtained.

The present invention is not limited to the above embodiment, and the shape of the packaging bag 1 can be arbitrarily changed according to the type of the article 3 to be cooked. Further, in the above-described embodiment, the notch 13 is formed in the back affixing portion 8c as a means for opening the steam passage 7, but as shown in FIG.
Instead, a microwave heating element 20 may be provided at a position corresponding to the second passage 11 in the back adhering portion 8c.

In this embodiment, when the article to be cooked 3 is cooked, the microwave heating element 20 generates heat by microwaves in a microwave oven, melting the back-sticking portion 8c and opening the steam passage 7. It becomes possible to attach the back part 8c before cooking
There is an advantage that the trouble of opening the package can be omitted. In addition, the notch 15 for the stopper is not necessarily provided, and by using a uniaxially stretched film stretched in the same direction as the longitudinal direction of the back affixing portion 8c for the packaging sheet 5, the breaking direction by the notch 13 is The direction is perpendicular to the stretching direction, so that the back sticking portion 8c can be prevented from being excessively broken.

Further, in the present embodiment, the ends of the packaging sheet 5 are adhered to each other at the time of the pillow packaging, so that
Although 8c is formed, even if the back pasting portion 8c is configured as shown in FIG. 6, it is within the range intended by the present invention. In the package shown in FIG. 6, the middle part of the packaging sheet 5 is double-folded into a pair, and the inner surfaces of the folded and overlapped portions are adhered to each other to form a back affixing portion 8c. The ends 8a, 8b, 8d of the packaging sheet 5 are separately bonded by heat welding to form a sealed bag.

Further, in the present embodiment, a description has been given of a case where one packaging sheet 5 is formed by folding, but the present invention is not limited to this. For example, as shown in FIG. It can also be manufactured by overlapping and bonding three packaging sheets as described above. In the package shown in FIG. 7, a first wrapping sheet 5 </ b> A located below the accommodation space 9 and a pair of second wrappers 5 located above the accommodation space 9 and forming the back adhering portion 7. Packaging sheet
5B, the peripheral edges 8a, 8b, 8d, of the first packaging sheet 5A.
The second packaging sheets 5B are adhered to 8e, respectively, the ends of the pair of second packaging sheets 5B are overlapped, and the inner surfaces thereof are adhered to each other to form the back adhering portion 8c.

[0023]

According to the present invention, the back pasting portion of the microwave oven package according to the present invention has a first passage communicating with the accommodation space and a second passage extending from a position above the first passage in the longitudinal direction of the back pasting portion. Since the steam passage including the passage is formed and the second passage is configured to be openable, the article to be cooked can be easily cooked using the microwave oven by opening the steam passage.

In addition, since the steam passage is provided in the back affixing portion, the steam passage can be positioned above the packaging bag that is inflated with steam. The liquid of the cooked product can be prevented from leaking to the outside through the vapor passage, and the inside of the microwave oven is hardly contaminated.

Further, unlike the related art, there is no need for extra processing for providing other members such as a check valve, so that there is an advantage that the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a packaging bag showing one embodiment of the present invention.

2A is a cross-sectional view before cooking, and FIG. 2B is a cross-sectional view during cooking.

FIG. 3 is a perspective view of a package including a partial cross section during cooking.

FIGS. 4A to 4D are views each showing a shape of a notch;

FIG. 5 is a front view of a main part showing another embodiment of the present invention.

FIG. 6 is a perspective view showing another embodiment of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Packaging bag, 3 ... Cooking item, 5 ... Packaging sheet, 7 ... Steam passage, 8c ... Back pasting part, 9 ... Housing space, 10 ... 1st passage,
11 ... Second passage

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 81/34 B65D 33/01 A23L 1/00

Claims (2)

(57) [Claims] A pair of wrapping sheets (5) superimposed on each other.
In a package for a microwave oven in which a product to be cooked (3) is housed in a packaging bag (1) having a back pasting portion (8c) formed by bonding inner surfaces of the microwave oven, the back pasting portion (8c) has First passage (10) communicating with the accommodation space (9) and the first passage (10)
And a second passage (11) extending in a longitudinal direction of the back pasting portion (8c) from a position above the steam passage (7).
Moreover, the second passage (11) is configured to be openable, and
The package for a microwave oven, wherein the second passage (11) is narrower than the first passage (10) . 2. The first passage (10) includes a back adhering portion (8c).
The package for a microwave oven according to claim 1, wherein the package is located substantially at the center in the longitudinal direction of the package.