JPH0728135Y2 - Easy open packaged food - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy-open packaged food product containing at least cooked rice.

[0002]

2. Description of the Related Art Recently, as one of instant foods, cooked rice (for example, retort sterilized rice balls) has been formed in a concave portion of a container body made of heat-fusible plastic (for example, polypropylene).
A container-filled cooked rice in which a sheet-like lid body made of polypropylene is heat-sealed to the flange of the container body has been developed.

The packaged cooked rice is heated in a microwave oven at the time of eating. At this time, if the packed rice in the container is put in a microwave oven as it is, the bag may be broken and the stored rice ball may be scattered. Further, if the bag is not broken, the lid body is swollen, which is dangerous when opening. In addition, since the water once evaporated on the surface of the rice ball reattaches to the surface of the rice ball, stickiness occurs.

For this reason, holes are made in several portions of the sheet-like lid body or the corners of the sheet-like lid body are peeled off from the container body before the packaged cooked rice is put in a microwave oven. ing. However, there is a problem that these pretreatments are very troublesome.

The present invention has been made in order to solve the above-mentioned conventional problems. For example, a sheet-like lid is provided with a hole to prevent the container from swelling or the lid is peeled off from the container body. Instead, the present invention aims to provide an easy-open packaged food that can be microwaved as it is.

[0006]

An easy-open packaged food product according to the present invention is housed in a container body made of heat-fusible plastic having at least one recess and at least one of the recesses in the container body. And a sheet-like lid body made of heat-fusible plastic that is heat-sealed to the flange portion of the container body,

Seal strength is 800 to 1800 gf / 15
mm-shaped outer seal portion and seal strength is 180
The inner seal portion of 0 to 3000 gf / 15 mm (however, the seal strength of the inner seal portion is larger than the seal strength of the outer seal portion) is a contact surface between the flange portion of the container body and the sheet-like lid. Formed in

The unsealed portion is formed inside the outer sealed portion so as to be surrounded by the inner sealed portion so as to be connected to at least a part of the unsealed portion corresponding to the recess. . When a plurality of recesses are formed in the container body, side dishes are provided in recesses other than the recess in which the cooked rice is stored,
Allows the storage of other foods such as gyoza and Shumai.

The reason for limiting the sealing strength of the frame-shaped outer seal portion is as follows. When the sealing strength is less than 800 gf / 15 mm, the sheet-like lid body is peeled off from the container body due to a small external force at the distribution stage, and the shelf life of the cooked rice stored is deteriorated.
On the other hand, when the seal strength exceeds 1800 gf / 15 mm, the outer seal portion near the unsealed portion of the lid does not peel well from the container main body when it is microwaved. More preferable seal strength is 1100-1.
The range is 500 gf / 15 mm.

The reason why the sealing strength of the inner seal portion is limited is as follows. When the seal strength is less than 1800 gf / 15 mm, the inner seal portion peels off at the flow stage and the like, and it becomes difficult to partition the unsealed portion together with the outer seal portion into a predetermined region.
On the other hand, when the sealing strength exceeds 3000 gf / 15 mm, it becomes difficult to peel the lid body from the container body during eating. The more preferable seal strength is 200
It is in the range of 0 to 2300 gf / 15 mm.

The seal strength of the inner seal portion needs to be higher than that of the outer seal portion,
The strength difference is preferably 300 gf / 15 mm or more, more preferably 500 gf / 15 mm or more.

Another easy-open packaged food product according to the present invention is housed in a container body made of heat-fusible plastic having a plurality of recesses and at least one of the plurality of recesses of the container body. A cooked rice, and a sheet-shaped lid body made of heat-fusible plastic that is heat-sealed to the collar portion of the container body,

Seal strength is 800 to 1800 gf / 15
mm-shaped outer seal portion and seal strength is 180
The inner seal portion of 0 to 3000 gf / 15 mm (however, the seal strength of the inner seal portion is larger than the seal strength of the outer seal portion) is a contact surface between the flange portion of the container body and the sheet-like lid. Formed in

The unsealed portion is formed inside the outer sealed portion and is surrounded by the inner sealed portion so as to be connected to at least a part of the unsealed portion corresponding to one of the plurality of recessed portions. In addition, it is characterized in that it is also formed between the adjacent concave portions of the container body.

All of the cooked rice may be stored in the plurality of recesses of the container body, or cooked rice may be stored in one of the recesses and the other recesses may be filled with other foods such as prepared foods, gyoza, shumai, etc. Allows storage. The easy-open packaged food according to the present invention allows the cooked rice stored therein to be subjected to a pressure heating treatment in order to improve the shelf life.

[0016]

The easy-open packaged food product according to the present invention comprises a container body having at least one recess, rice cooked in at least one of the recesses of the container body, and a collar portion of the container body with heat. A sheet-like lid to be sealed, each of which has a frame-shaped outer seal portion and inner seal portion (wherein the seal strength of the inner seal portion is higher than that of the outer seal portion). Is formed on the contact surface between the flange portion of the container body and the sheet-like lid, and the unsealed portion is connected to at least a part of the unsealed portion corresponding to the recess inside the outer sealed portion. It is formed by being surrounded by the inner seal portion. When the easy-open packaged food having such a structure is put in a microwave oven as it is, water is evaporated from the cooked rice stored in the recess of the container body. The evaporated water (steam) is
Collected in the unsealed part between the outer sealed part and the inner sealed part, which connects the unsealed part of the recess. Since the sealing strength of the outer seal portion adjacent to the unsealed portion is smaller than that of the inner sealed portion, the outer seal portion is easily peeled off by the water vapor pressure collected in the unsealed portion. As a result, the water vapor is released to the outside (in the microwave oven) through the peeled outer seal portion.

Therefore, when the easy-open packaged food according to the present invention is put in a microwave oven as it is, the steam generated from the cooked rice can be discharged from a predetermined place to the outside. It is possible to eliminate troublesome operations such as making a hole and peeling the lid from the container body, and further prevent sticky rice from being swelled by the container and preventing the cooked rice from popping due to a broken bag.

Further, since the cooked rice stored in the concave portion of the container body is well sealed by the inner seal portion having a sealing strength of 1800 to 3000 gf / 15 mm, the cooked rice can be well shielded from the outside world and has a long shelf life. You can get easy-open packaged food.

Another easy-open packaged food product according to the present invention is a container body having at least one recess, rice cooked in at least one of the recesses of the container body, and a collar portion of the container body. A sheet-like lid that is heat-sealed to each other, each of which has a frame-like outer seal portion and inner seal portion (wherein the seal strength of the inner seal portion is the seal strength of the outer seal portion). Is formed on the contact surface between the flange portion of the container body and the sheet-like lid body, and the unsealed portion corresponds to one concave portion of the plurality of concave portions inside the outer sealed portion. It is formed so as to be surrounded by the inner seal portion so as to be connected to at least a part of the unsealed portion, and also formed between the adjacent concave portions of the container body. When the easy-open packaged food having such a structure is put in a microwave oven as it is, water is evaporated from the cooked rice stored in the recess of the container body. Also, food in another recess adjacent to the recess (for example, cooked rice)
Moisture (water vapor) evaporated from the water also flows through the unsealed portions between the recesses. The water vapor collects in an unsealed part connected to an unsealed part corresponding to at least one of the recesses. Since the sealing strength of the outer seal portion adjacent to the unsealed portion is smaller than that of the inner sealed portion, the outer seal portion is easily peeled off by the water vapor pressure collected in the unsealed portion. As a result, the water vapor is released to the outside (in the microwave oven) through the peeled outer seal portion.

Therefore, in another easy-open packaged food product according to the present invention, as described above, the steam generated from cooked rice can be released from a predetermined place to the outside by subjecting it to a microwave oven as it is as described above. It is possible to eliminate the troublesome operation of opening a hole in the sheet-like lid or peeling off the lid from the container body,
Further, it is possible to prevent the cooked rice from sticking due to the swelling of the container and preventing the cooked rice from popping out due to the broken bag.

[0021]

Embodiments of the present invention will now be described in detail with reference to the drawings. Example 1

FIG. 1 is a plan view showing a food product packed in an easy open container according to a first embodiment of the present invention, and FIG. 2 is a line II- of FIG.
It is sectional drawing which follows the II line. The container body 1 made of polypropylene and having a substantially square shape is composed of one triangular concave portion 2 formed by deep drawing and a collar portion 3 formed around the concave portion 2. Rice (rice ball) 4
Are stored in the recess 2. The sheet-shaped lid 5 made of polypropylene is heat-sealed to the container body 1. That is, the frame-shaped outer seal portion 6 and the inner seal portion 7 are formed on the contact surface between the flange portion 3 of the container body 1 and the sheet-like lid body 5. The unsealed portion 8 is formed inside the outer sealed portion 6 in the vicinity of one corner of the container body 1 so as to be surrounded by the inner sealed portion 7 so as to be connected to a part of the unsealed portion 9 corresponding to the recess 2. Has been done. The seal strength of the outer seal portion 6 is 1200 gf / 15 mm,
The sealing strength of the inner seal portion 7 is 2200 gf / 15.
with mm. The tongue piece 10 is integrally formed at one corner of the lid body 5. The food in the easy open container containing the cooked rice 4 is subjected to pressure heating treatment.

When the easy-open packaged food having such a structure is put in the microwave oven as it is, water is evaporated from the cooked rice 4 stored in the recess 2 of the container body 1. The evaporated moisture (water vapor) is surrounded by the inner seal portion 7 so as to be connected to the unsealed portion 9 corresponding to the concave portion 2 inside the outer seal portion 6, and the collar portion 3 of the unsealed portion 8 is surrounded.
And gather between the lids 5. The seal strength of the outer seal portion 6 adjacent to the unsealed portion 8 is 1200 gf / 15 mm.
And that of the inner seal portion 7 (2200 gf / 1
5 mm), the outer seal portion 6 is easily peeled off by the water vapor pressure collected in the unsealed portion 8. As a result, the water vapor is removed from the peeled outer seal portion 6
Is released to the outside (inside the microwave oven).

Therefore, the easy-open packaged food product according to the first embodiment can be released from the steam generated from the cooked rice 4 to the outside from a predetermined place by putting it in a microwave oven as it is. It is possible to eliminate the troublesome operation of making a hole in the lid or peeling the lid from the container body, and prevent sticky rice from being swelled by the container and preventing the cooked rice from popping due to a broken bag.

The cooked rice 4 stored in the recess 2 of the container body 1 is well sealed by the outer seal portion 6 having a seal strength of 1200 gf / 15 mm and the inner seal portion 7 having a seal strength of 2200 gf / 15 mm. In addition, the cooked rice can be well shielded from the outside world, and an easy-open packaged food having a long shelf life can be obtained.

Further, the tongue piece 1 is provided at one corner of the lid body 5.
If 0 is integrally formed, the lid 5 as a whole is held with the tongue piece 10 after being taken out from the microwave oven.
It can be easily peeled off. Example 2

FIG. 3 is a plan view showing a food product packed in easy-open containers according to a second embodiment of the present invention, and FIG.
It is sectional drawing which follows the IV line. The container body 11 made of polypropylene and having a substantially rectangular shape includes two triangular concave portions 12a and 12b formed by deep drawing and the concave portion 1 described above.
2a, 12b and a flange portion 13 formed around the periphery. Cooked rice (rice balls) 14a, 14b are housed in the recesses 12a, 12b. The sheet-shaped lid 15 made of polypropylene is heat-sealed to the container body 11. That is, the frame-shaped outer seal portion 16 and the inner seal portion 17 are formed on the contact surface between the flange portion 13 of the container body 11 and the sheet-like lid body 15. In this case, the inner seal portion 17 is also formed on the contact surface between the flange portion 13 of the container body 11 and the sheet-like lid body 15 located between the recesses 12a and 12b. Unsealed part 18
a and 18b are the recesses 12a and 1b near the opposing corners of the container body 11 inside the outer seal 16.
It is formed so as to be surrounded by the inner seal portion 17 so as to be connected to a part of the unsealed portions 19a and 19b corresponding to 2b. The seal strength of the outer seal portion 16 is 120
The inner seal portion 17 has a seal strength of 2200 gf / 15 mm. Tongue pieces 20a, 2
0b is formed integrally with the corner portion of the lid 15 where the unsealed portions 18a and 18b are located. The easy-open packaged food containing the cooked rice 14a and 14b is subjected to a pressure heating treatment.

When the easy-open packaged food having such a structure is put in the microwave oven as it is, the cooked rice 14 stored in the recesses 12a and 12b of the container body 11 is cooked.
Water evaporates from a and 14b. Moisture (steam) evaporated from the cooked rice 14a in one of the recesses 12a is surrounded by the inner seal portion 17 inside the outer seal portion 16 so as to be connected to the unsealed portion 19a of the recess portion 12a. 18a gathers between the collar portion 13 and the lid body 15. The outer seal portion 1 adjacent to the unsealed portion 18a
Since 6 has a sealing strength of 1200 gf / 15 mm, which is smaller than that of the inner sealing portion 17 (2200 gf / 15 mm), the outer sealing portion 16 is easily peeled off by the water vapor pressure collected in the unsealed portion 18a. . As a result, the water vapor is released to the outside (inside the microwave oven) through the peeled outer seal portion 16. Also, the water (water vapor) evaporated from the cooked rice 14b in the other recess 12b
Is also collected in the unsealed portion 18b in the same manner as described above, and the water vapor pressure easily peels off the outer sealed portion 16, so that the water vapor is released to the outside (inside the microwave oven) through the peeled outer sealed portion 16. To be done.

Therefore, when the easy-open container-packed food according to the second embodiment is placed in the microwave oven as it is, water vapor generated from the cooked rice 14a and 14b is removed from the outer seal portion 16 where the unsealed portions 18a and 18b are located.
Since it can be released from the container to the outside, it can eliminate the troublesome operations of opening holes in the sheet-shaped lid and peeling the lid from the container body as in the past. It is possible to prevent the rice cooked in the bag from popping out.

Further, the recesses 12a, 1 of the container body 11
The rice rice 14a, 14b stored in 2b has a seal strength of 1
The 200 gf / 15 mm outer seal portion 16 and the sealing strength of 2200 gf / 15 mm inner seal portion 17 are respectively well sealed, so that the cooked rice can be well shielded from the outside world and an easy-open packaged food product with a long shelf life can be obtained. be able to.

Further, since the recessed portions 12a and 12b of the food product packed in the easy open container are independently sealed by the inner seal portion 17, even if cooked rice is stored in one recessed portion and prepared food containing juice is stored in the other recessed portion. It is possible to prevent the side dish juice from moving into another adjacent concave portion and seeping into the cooked rice therein. Example 3

FIG. 5 is a plan view showing a food product packaged in an easy open container according to a third embodiment of the present invention, and FIG.
It is sectional drawing which follows the VI line. The container body 21 made of polypropylene and having a substantially rectangular shape includes two triangular concave portions 22a and 22b formed by deep drawing and the concave portion 2 described above.
2a and 22b, and a collar portion 23 formed around the periphery. Cooked rice (rice balls) 24a, 24b are stored in the recesses 22a, 22b. The sheet-shaped lid 25 made of polypropylene is heat-sealed to the container body 21. That is, the frame-shaped outer seal portion 26 and the inner seal portion 27 are formed on the contact surface between the flange portion 23 of the container body 21 and the sheet-like lid body 25. The unsealed portion 28 is the recess 2 inside the outer sealed portion 26.
2a, 22b is formed from the periphery of each of the recesses 22a, 22b to the vicinity of the opposing corner of the container body 21, and is connected to the unsealed portions 29a, 29b corresponding to the recesses 22a, 22b. . The outer seal portion 2
The seal strength of No. 6 is 1200 gf / 15 mm, and the seal strength of the inner seal portion 27 is 2200 gf / 15 mm. The tongue pieces 30a and 30b are integrally formed at the opposite corner portions of the lid body 25 where the unsealed portion 28 is located. The cooked rice 14a, 14b
The easy-open container-packed food containing the is subjected to pressure heat treatment.

When the easy-open packaged food having such a structure is put in the microwave oven as it is, the cooked rice 24 stored in the recesses 22a and 22b of the container body 21 is prepared.
Water evaporates from a and 24b, and the recess 22
They flow through each other through the unsealed portion 28 between a and 22b. Moisture (water vapor) evaporated from each of the cooked rice 24a and 24b is stored in the recess 22a inside the outer seal portion 26.
Of the unsealed portion 28 surrounded by the inner sealed portion 27 so as to be connected to the unsealed portions 29a, 29b of the container 22b, the flange portion 23 near the opposing corner portion of the container body 21.
And between the lid 25. The seal strength of the outer seal portion 26 adjacent to the unsealed portion 28 is 1200 gf.
/ 15 mm, that of the inner seal portion 27 (22
(00 gf / 15 mm), the outer seal part 26 is smaller due to the water vapor pressure collected in the unsealed part 28.
Peels off easily. As a result, the water vapor is released to the outside (inside the microwave oven) through the peeled outer seal portion 26.

Therefore, when the easy-open packaged food according to the third embodiment is placed in a microwave oven as it is, the steam generated from the cooked rice 24a and 24b is discharged from the outer seal portion 26 where the unsealed portion 28 is located to the outside. Since each can be released, it is possible to eliminate the troublesome operation of opening a hole in the sheet-shaped lid and peeling the lid from the container body as in the past, and to make the cooked rice sticky due to the bulging of the container and the cooked rice due to the broken bag. Can be prevented from popping out.

Also, the recesses 22a, 2 of the container body 21
The cooked rice 24a, 24b stored in 2b has a seal strength of 1
The 200 gf / 15 mm outer seal portion 26 and the sealing strength of 2200 gf / 15 mm inner seal portion 27 are respectively well sealed, so that the cooked rice can be well shielded from the outside world, and a long-lived easy-open packaged food product can be obtained. be able to.

In the third embodiment, the unsealed portion is formed both around the recessed portions including the two recessed portions inside the outer sealed portion and in the vicinity of the opposite corner portions of the container body. The seal portion may be formed from the periphery of each of the recesses including the space between the two recesses inside the outer seal portion to only one corner of the container body.

[0037]

As described above in detail, according to the easy-open packaged food according to the present invention, the steam generated from cooked rice can be released from a predetermined place to the outside by being put in a microwave oven as it is. It is possible to eliminate the troublesome operation of opening a hole in the sheet-like lid and peeling the lid from the container body like the above, and prevent sticky rice cooked due to the bulging of the container and popping of cooked rice caused by a broken bag. It has a remarkable effect.

[Brief description of drawings]

FIG. 1 is a plan view showing an easy-open packaged food product according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view showing an easy-open packaged food product according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan view showing an easy-open packaged food product according to a third embodiment of the present invention.

6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

1, 11, 21 ... Container body 2, 12a, 12b, 22
a, 22b ... Recessed portion, 3, 13, 23 ... Collar portion, 4, 14
a, 14b, 24a, 24b ... cooked rice, 5, 15, 25
... Sheet-like lids, 6, 16, 26 ... Outer seal parts, 7, 1
7, 27 ... Inner sealed portion, 8, 18a, 18b, 28 ... Unsealed portion.

Claims (2)

[Scope of utility model registration request] 1. A container body made of a heat-fusible plastic having at least one recess, rice cooked in at least one of the recesses of the container body, and heat-sealed to a flange of the container body. A sheet-like lid made of a heat-fusible plastic, and a frame-shaped outer seal portion having a seal strength of 800 to 1800 gf / 15 mm and a seal strength of 1800 to 3000.
An inner seal portion of gf / 15 mm (however, the seal strength of the inner seal portion is higher than that of the outer seal portion) is formed on the contact surface between the flange portion of the container body and the sheet-like lid. The unsealed portion is formed inside the outer sealed portion so as to be surrounded by the inner sealed portion so as to be connected to at least a part of the unsealed portion corresponding to the recess. Food. 2. A container body made of a heat-fusible plastic having a plurality of recesses, rice cooked in at least one of the plurality of recesses of the container body, and a collar portion of the container body with heat. A sheet-like lid body made of a heat-fusible plastic to be sealed, and a frame-shaped outer seal portion having a seal strength of 800 to 1800 gf / 15 mm and a seal strength of 1800 to 3000.
An inner seal portion of gf / 15 mm (however, the seal strength of the inner seal portion is higher than that of the outer seal portion) is formed on the contact surface between the flange portion of the container body and the sheet-like lid. And the unsealed portion is formed inside the outer sealed portion so as to be surrounded by the inner sealed portion so as to be connected to at least a part of the unsealed portion corresponding to one of the plurality of concave portions. An easy-open packaged food product, which is also formed between adjacent recesses of the container body.