JP2011139654A - Method for producing packaged boiled rice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a packaged boiled rice which comprises charging rice or the like and boiling water into a packaging container having an opening at its upper part and an outward flange-like heat-sealing part at the periphery of the opening part, and boiling the rice to obtain tasty boiled rice, and also which easily and reliably enables favorable heat sealing and hermetically-sealed packaging. <P>SOLUTION: The method for producing a packaged boiled rice having a lid material film 9 comprises: charging rice 2 and boiling water into a package container 1 which has an opening at its upper part and an outward flange-like heat-sealing part 4 at the periphery of the opening part, to boil the rice; thereafter covering the upper part of the packaging container with the film; and applying pressure on the flange-like heat-sealing part to be heat-sealed so as to hermetically seal the container. In the method, the lid material film is pressurized on the flange-like heat-seal part to be heat-sealed after water supply 10 to solid adhering matter 6 which adheres to the sealed surface of the flange-like heat-sealing part during boiling rice to make liquefaction 8 of the solid adhering matter before heat-sealing by pressurizing the lid material film after boiling rice, so as to hermetically seal the container. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for producing packaged cooked rice, and more specifically, rice grains, beans, cooked rice, processed products thereof, etc. are opened at the top, and an outward flange-like heat seal portion is provided at the periphery of the opening. Packed rice that can be packed in packaging containers, cooked water, cooked delicious enough to be partially spilled during cooking, cooked with good heat seal and sealed packaging It is to provide a manufacturing method.

Conventionally, there is a method for producing aseptic packaged rice in which rice filled in a packaging container is sterilized by heating, and then cooked by adding cooking water (see Patent Documents 1 to 4).
However, if the rice is cooked with sufficient heating so that a part of it is blown out during cooking, and cooked delicious rice, solid deposits are generated on the sealing surface of the packaging container. When the lid material film is heat-sealed on the sealing surface of the packaging container generated and hermetically packaged, heat sealing between the sealing surface of the packaging container and the lid material film is hindered, and only an incomplete seal is obtained, Good sealed packaging cannot be obtained.

  Therefore, there is a method of appropriately adjusting the heating so that a part does not spill during cooking, so that solid deposits are not generated on the sealing surface of the packaging container, but such heating is insufficient. And there was a problem that it was not possible to cook delicious rice.

  Further, there is a method of increasing the height of the packaging container so that no solid deposits are generated on the sealing surface of the packaging container, but the cost of the container is increased and the volume of the container is increased. There are problems such as an increase in the size of the container, and when the inside of the container is replaced with an inert gas or the like, there is a problem that the replacement efficiency is deteriorated.

On the other hand, the lid member 60 is thermally bonded to the outer peripheral edge of the flange portion of the tray-like container body 50 provided with one or more holes 6a to 6d for releasing steam to the outside in the flange portion 4. Rice is cooked and spilled is discharged from the holes 6a to 6d, and after cooking, the sealing material 70 is thermally bonded to the back of the outside of the hole of the flange portion to seal the hole, and the rice cooking and sealed packaging container 100 Has been proposed (see Patent Document 5).
However, with such a configuration, there is a problem that the container cost becomes high and the operation becomes complicated and the cost is increased.

Japanese Patent No. 2912876 Japanese Patent No. 2826088 Japanese Patent No. 2949275 Japanese Patent Publication No. 7-100004 Japanese Patent Laid-Open No. 2005-59860

  The purpose of the present invention is to fill rice cereals, beans, cooked rice, processed products thereof, etc. into a packaging container having an open flange-shaped heat seal part at the periphery of the opening and adding cooking water. In addition, it is possible to cook delicious rice with sufficient heating so that part of it is blown out during cooking, and provide a method for producing packaged rice that can be easily and reliably sealed with good heat seal It is to be.

  As a result of earnest research, the present inventors filled rice cereals, beans, cooked rice, processed products thereof, etc. into a packaging container having an upper flange opening and a flange-shaped heat seal portion facing outward at the periphery of the opening, Add boiling water, cook enough to partially blow out during cooking, cook rice, supply water to the solid deposit attached to the sealing surface of the flange-shaped heat seal part, and liquid It was found that good heat-sealing and hermetic packaging can be achieved by pressurizing and heat-sealing the lid material film, and the present invention has been achieved.

Claim 1 of the present invention for solving the above-mentioned problem is that after the upper part is opened and the packaging container having an outward flange-like heat seal part at the periphery of the opening is filled with rice and cooking water and cooked. In the manufacturing method of the packaged cooked rice, which covers the upper part of the packaging container, and has a lid material film that is heat-sealed by pressurizing the flange-shaped heat seal part,
After cooking, before pressurizing and heat-sealing the lid material film, water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal portion during cooking, and the solid deposit Is liquefied, and then the lid material film is pressurized and heat-sealed to the flange-shaped heat-sealed portion, and hermetically sealed and packaged.

  Claim 2 of the present invention is the method for producing packaged cooked rice according to claim 1, wherein when the water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal part, the solid deposit is Water is supplied only to the attached flange-shaped heat seal part, or water is supplied to the surface of cooked rice in the packaging container in the same manner.

  According to a third aspect of the present invention, in the method for producing packaged cooked rice according to claim 1 or 2, the aseptic packaged cooked rice is produced by performing from the rice cooking process to the sealing and sealing process in an aseptic space. .

  According to a fourth aspect of the present invention, in the method for producing packaged cooked rice according to any one of the first to third aspects, a sterilization step is provided before the rice cooking step, and the sterilization step to the sealing and sealing step are aseptic. Aseptic packaging rice is produced by performing in space.

Claim 1 of the present invention is that the upper part of the packaging container is opened after the upper part is opened and the packaging container provided with the outward flange-like heat seal part at the periphery of the opening is filled with rice and cooking water. In the manufacturing method of packaged cooked rice provided with a lid material film that is sealed by heat-sealing by pressurizing the flange-shaped heat seal part,
After cooking, before pressurizing and heat-sealing the lid material film, water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal portion during cooking, and the solid deposit Is a method for producing packaged cooked rice, wherein the lid-like heat seal part is pressurized and heat-sealed and hermetically packaged after liquefying,
By liquefying the adhering substance by supplying water, the adhering substance can be easily removed from the sealing surface simply by pressurizing the lid material film to the flange-like heat seal portion, and the sealing surface and lid of the packaging container Adherent material is substantially eliminated from the material film, heat sealing is not hindered, and good heat sealing and hermetic packaging can be easily and reliably performed.
It has a remarkable effect that it is possible to cook delicious cooked rice by adding enough cooking water and heating enough so that part of it is blown out during cooking.

Claim 2 of the present invention is the method for producing packaged cooked rice according to claim 1, wherein when the water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal part, the solid deposit is Supplying water only to the attached flange-shaped heat seal part, or further supplying water to the cooked rice surface in the packaging container in the same manner,
When supplying water only to the heat seal part, there is an effect that the deposits can be liquefied without affecting the cooked rice, or when supplying water to the cooked rice surface, the feeding method is limited. If the water content on the surface of the cooked rice tends to be insufficient, it can be supplemented, and the quality of the cooked rice can be improved.

According to a third aspect of the present invention, in the method for producing packaged cooked rice according to claim 1 or 2, the aseptic packaged cooked rice is produced by performing from the rice cooking process to the sealing and sealing process in an aseptic space. Is,
There is a further remarkable effect that a delicious aseptic packaged cooked rice that can be stored at room temperature for a long time can be easily produced.

According to a fourth aspect of the present invention, in the method for producing packaged cooked rice according to any one of the first to third aspects, a sterilization step is provided before the rice cooking step, and the sterilization step to the sealing and sealing step are aseptic. It is characterized by producing aseptically packaged cooked rice by performing in space,
There is a further remarkable effect that delicious aseptic packaged rice that can be stored for a long period of time at room temperature can be more reliably and easily manufactured.

(I) is an explanatory diagram showing a state in which polished rice is washed and then immersed in water to be impregnated with water, the rice is weighed and filled in a packaging container, and cooked water is added to cook rice. Yes, (B) is an explanatory view showing a state where solid deposits are attached to the sealing surface of the flange-shaped heat seal part of the packaging container after cooking, and (C) is a packaging container after cooking It is explanatory drawing which shows the state which is spraying the water on the solid deposit | attachment adhering to the sealing surface of the flange-shaped heat seal part of (2), and (d) is a solid deposit | attachment being liquid by spraying water. It is explanatory drawing which shows the state which turned into a figure, (e) is an explanation which shows the state which pressurizes a cover material film to a flange-like heat-seal part, heat-seals, and seal-wraps after solid adhering material liquefies FIG.

Next, the contents of the present invention will be described in detail with reference to FIG.
As shown in FIG. 1 (a), after washing polished rice, it is immersed in water and impregnated with water, the rice 2 is weighed and filled into a packaging container 1, and cooking water is added. Cook rice. The packaging container 1 is open at the top and includes an outward flange-like heat seal portion 4 on the periphery of the opening 3. When the rice is cooked by sufficient heating, foaming 5 due to boiling occurs during cooking, and a part of it may be blown out, and a part thereof remains on the surface of the flange-shaped heat seal part 4.

As shown in FIG. 1B, after the rice is cooked, the solid deposit 6 adheres to the sealing surface of the flange-shaped heat seal portion 4 of the packaging container 1.
Here, the solid form refers to a substance having a low water content and no fluidity, or a semi-solid viscous substance having a high viscosity and poor fluidity.

  As shown in FIG. 1 (c), after cooking rice, water is sprayed onto the solid deposit 6 attached to the sealing surface of the flange-shaped heat seal portion 4 of the packaging container 1 using a spray 10.

As shown in FIG. 1D, the solid deposit 6 is liquefied 8 by spraying water.
Here, liquefaction means that a solid substance is dissolved in water to change into a fluid substance, or even if it is not completely dissolved, the solid substance becomes a fluid liquid. It refers to changing to a substance that is dispersed or floating and is substantially fluid.

  As shown in FIG. 1 (e), after the solid deposit 6 is liquefied 8 by spraying water, the lid material film 9 is pressurized and heat-sealed to the flange-shaped heat seal portion 4 to form a liquid. Since the adhering material 6 is squeezed out from the sealing surface by pressurization, that is, between the sealing surface of the flange-shaped heat seal portion 4 and the sealing surface of the lower surface of the lid material film 9, Is substantially free from liquefied deposits 6 and can be sealed well.

  The polished rice, rice grains, beans, cooked rice, processed products thereof, etc. used in the present invention are not particularly limited, and specifically, for example, a mixture of polished rice with beans to make bean rice. But you can. Washed rice may be used for the polished rice.

  The water used for this invention is not specifically limited, Specifically, well-known waters, such as a tap water, distilled water, ion-exchange water, a pure water, can be used, for example.

In the present invention, the temperature of water supplied to the sealing surface of the flange-shaped heat seal part of the packaging container is not particularly limited, but preferably 5 to 60 ° C. can be used.
Although depending on the temperature of the sealing surface of the flange-shaped heat seal part when supplying water, if the temperature of the supplied water is in the range of 5 ° C. or more and 60 ° C. or less, the solid attachment attached to the sealing surface Regardless of the amount of the kimono 6, the solid deposit 6 can be liquefied quickly and hermetically sealed more quickly and reliably. Furthermore, the supplied water is difficult to re-evaporate, and the liquefied solid deposit 6 does not have to be dried and solidified again, and can be hermetically sealed.

The cooking water used in the present invention is not particularly limited. Specifically, in addition to water, various liquids such as seasonings and sauces can be used, and various flavored rice can be cooked. .
Before cooking rice filled in a packaging container provided with an outward flange-like heat seal part at the periphery of the opening, a necessary amount of cooking water is added before cooking.

After cooking rice in the present invention, after cooling as necessary, the lid-like film is pressurized and heat-sealed to the flange-shaped heat seal portion.
The cooling temperature at the time of cooling is not particularly limited as long as it is a temperature that can prevent re-evaporation of the supplied water, but as a guideline, it is preferable to cool so that the surface temperature of the flange-shaped heat seal portion is 5 ° C to 80 ° C. .
Depending on the temperature of the water to be supplied, if the surface temperature of the sealing surface of the heat seal part is in the range of 5 ° C. or higher and 80 ° C. or lower, the supplied water is difficult to re-evaporate and is a liquefied solid deposit There is no fear that the solid will be dried and solidified again. Regardless of the amount of the solid deposit 6 adhering to the sealing surface, the solid deposit 6 can be liquefied quickly and hermetically sealed more quickly and reliably. be able to.
The cooling method may be natural cooling in addition to active cooling with cooling air or the like.

  The water supply method performed in the present invention is not particularly limited. Specifically, for example, a spraying method using a spray device or the like, a coating method, a dropping method, etc. are used alone or in combination of two or more methods. Water can be supplied.

  In the present invention, water is supplied to the solid deposit adhering to the sealing surface of the flange-shaped heat seal portion, but water is supplied only to the flange-shaped heat seal portion adhering to the solid deposit. Alternatively, water can also be supplied to the surface of cooked rice in the packaging container.

The amount of water to be supplied is not particularly limited, and is appropriately determined depending on the amount of solid deposit 6 attached to the seal surface.
When water is supplied only to the flange-shaped heat seal portion, the lower limit of the amount of water supplied is preferably 1 g, more preferably 5 g, per 100 cm ^{2 of the} heat seal portion surface area.
If the amount of water to be supplied is 1 g or more per 100 cm ^{2 of} heat seal portion surface area, water can be supplied to the entire heat seal portion, and the solid adhering matter 6 adhered to the sealing surface by the supplied water is liquid. It is possible to prevent a sealing failure.
If the amount of water to be supplied is 5 g or more per 100 cm ^{2 of} heat seal surface area, the solid adhering matter 6 attached to the seal surface by the supplied water can be quickly removed regardless of the water repellency of the seal surface or the supply method. It can be liquefied and can be hermetically sealed more quickly and reliably. Furthermore, the supplied water evaporates and the liquefied solid deposit 6 does not have to be dried and solidified again, so that the sealing can be performed more reliably.
In addition, the upper limit of the amount of water to be supplied is not particularly limited. However, if the amount of water to be supplied is 100 g or less per 100 cm ^{2 of the} heat seal surface area, water can be easily supplied only to the flange-shaped heat seal portion. You can save the amount.

When supplying water to the surface of cooked rice in the packaging container in addition to the flange-shaped heat seal part, the amount of water to be supplied is preferably 1 g or more and 100 g or less per 100 cm ² of the surface area of the flange-shaped heat seal part. More preferably, it is 5 g or more and 50 g or less.
If the amount of water to be supplied is 1 g or more per 100 cm ^{2 of} heat seal portion surface area, water can be supplied to the entire heat seal portion, and the solid adhering matter 6 adhered to the sealing surface by the supplied water is liquid. It is possible to prevent a sealing failure. In addition, if the amount of water to be supplied is 100 g or less per 100 cm ^{2 of the} heat seal surface area, the amount of water supplied can be saved and it is less susceptible to quality, and relatively moisture such as rice cake, miscellaneous cooking, risotto, etc. With a high amount of cooked rice, cooked rice with a good flavor can be produced more easily.
If the amount of water to be supplied is 5 g or more per 100 cm ^{2 of} heat seal surface area, the solid adhering matter 6 attached to the seal surface by the supplied water can be quickly removed regardless of the water repellency of the seal surface or the supply method. It can be liquefied and can be hermetically sealed more quickly and reliably. Furthermore, the supplied water evaporates and the liquefied solid deposit 6 does not have to be dried and solidified again, so that the sealing can be performed more reliably. Moreover, if the amount of water to be supplied is 50 g or less per 100 cm ^{2 of the} heat seal surface area, the quality of the cooked rice does not deteriorate, such as stickiness or softening of the cooked rice surface. Regardless of this, cooked rice with good flavor can be produced.

In addition, you may heat-sterilize as needed before adding cooking water.
For the heat sterilization, a known method or apparatus such as a pressure / heat sterilizer using a commercially available saturated steam or a heat sterilizer using a microwave can be used.

  The method of rice cooking is not particularly limited, and specifically, for example, a known method or apparatus such as gas direct cooking, high frequency induction heating (IH), steam rice cooking, microwave heating, or a combination of two or more of these A combination can be mentioned. Cook rice for a certain period of time at a predetermined temperature and pressure.

And after supplying water, when completely sealing with a heat sealing machine and sealing and packaging, the air in the packaging container 1 can be replaced with an inert gas, and then sealed with heat and sealed.
Further, an oxygen scavenger may be enclosed.

  The sterilization process is preferably performed in an aseptic environment, for example, aseptically performed in a clean room or clean booth of class 100 to class 10000 according to the standards of the NASA. When performing in an aseptic environment, use fully sterilized equipment, packaging, and containers. In addition, when performing in an aseptic environment, the water to be used for washing water, soaking water, cooking water (including various liquids such as seasonings and sauces) and the flange-shaped heat seal after cooking is used as necessary. Use sterilized one.

  If the packaging container 1 used in the present invention has an opening at the top and is provided with an outward flange-like heat seal part 4 at the periphery of the opening 3, the shape is round, polygonal, oval, tray-like, A cylindrical shape, a deep shape, and the like are not particularly limited.

The packaging container 1 only needs to have heat resistance and water resistance, and the material may be any of plastic, paper, glass, ceramics, metal, or a combination thereof, such as a gas barrier heat resistant container package, a heat resistant synthetic resin, and the like. Examples thereof include a plastic container made of a laminate material of a film and / or a metal foil.
Further, the lid material film is appropriately selected in consideration of sealability with the packaging container 1 and the like.
For example, the packaging container 1 has an ethylene-vinyl alcohol copolymer resin as an intermediate layer, and upper and lower layers are laminated with polypropylene and molded into a container. Further, as a lid material film, “PET / K nylon” / Polyethylene sealant "can be used.

  Then, after hermetically wrapping, it is stored in a storage room maintained at an appropriate temperature as it is or by packing it in a predetermined number of cardboard boxes, and is used for transportation and transportation.

  The description of the above embodiment is for explaining the present invention, and does not limit the invention described in the claims or reduce the scope thereof. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples.

Example 1
Made of heat-resistant plastic as shown in Fig. 1 after the polished rice is washed, immersed in water at room temperature for 1 hour, impregnated with water, 110g of the rice is weighed, and the upper part that can be used as a product after cooking is opened. The packaging container 1 was filled.
And the said container 1 for packaging was accommodated in the commercially available steam type pressurization and heating sterilizer, and it sterilized at 130 degreeC for 60 second.
And after sterilization, 90 g of sterilized cooking water was supplied to the packaging container 1 and cooked for 30 minutes using steam.
Then, after cooling for 10 minutes (cooling until the surface temperature of the flange-shaped heat seal part reaches 60 ° C.), as shown in FIG. 1 (c), the flange-shaped heat seal part 4 of the packaging container 1 10 g of water (30 ° C.) sterilized using the spray 10 was sprayed on the surface of the solid deposit 6 attached to the sealing surface and the cooked rice 7 in the packaging container 1 per 100 cm ² of the surface area of the flange-shaped heat seal portion.
As shown in FIG. 1D, the solid deposit 6 was liquefied by spraying sterilized water.
Then, as shown in FIG. 1 (e), in a clean booth, the product was completely heat sealed with a heat sealing machine and hermetically packaged.
The obtained cooked rice was sticky and delicious.
Although 20 packaging containers 1 were sealed and packaged in the same manner, there was no sealing failure.

(Comparative Example 1)
Rice was cooked and hermetically packaged in the same manner as in Example 1 except that the water as shown in FIGS. 1 (C) and (D) was not sprayed to liquefy the solid deposit 6.
Twenty packaging containers 1 were sealed and packaged in the same manner, but fifteen seal defects occurred in the twenty.

(Examples 2 to 7)
The spray amount of the supplied water in Example 1 was appropriately changed, and the others were cooked in the same manner as in Example 1 and hermetically packaged.
The obtained cooked rice was sticky and delicious.
Each of 20 packaging containers 1 was sealed and packaged in the same manner.
Except for Example 6, there was no sealing failure.
In Example 6, only one seal failure occurred.
The results are shown in Table 1.

(Examples 8 and 9)
The place where water was supplied in Example 1 was changed, and in addition to the flange-shaped heat seal portion, water was sprayed on the cooked rice surface in the packaging container in the same manner. The amount of water sprayed was 5 g and 50 g per 100 cm ^{2 of the} flange-shaped heat seal surface area, and the others were cooked in the same manner as in Example 1 and hermetically packaged.
The obtained cooked rice was sticky and delicious with no stickiness on the surface.
Although 20 packaging containers 1 were sealed and packaged in the same manner, there was no sealing failure.
The results are shown in Table 1.

(Examples 10 and 11)
In Example 1, the amount of soaked rice is 50 g, the mixed seasoning liquid 200 g is used as cooking water, the place where water is supplied is changed, and in addition to the flange-shaped heat seal part, the surface of cooked rice in the packaging container In the same manner except that water was sprayed, rice was cooked in the same manner as in Example 1 and hermetically packaged. The amount of water sprayed was 50 g and 100 g per 100 cm ² of the surface area of the flange-shaped heat seal part.
The obtained cooked rice was a delicious miso.
Although 20 packaging containers 1 were sealed and packaged in the same manner, there was no sealing failure.
The results are shown in Table 1.

The present invention opens the upper part, covers the upper part of the packaging container after filling rice and cooking water in a packaging container equipped with an outward flange-like heat seal part at the periphery of the opening, In the manufacturing method of packaged cooked rice with a lid material film that is heat sealed by pressurizing and heat-sealing the flange-shaped heat seal part,
After cooking, before pressurizing and heat-sealing the lid material film, water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal portion during cooking, and the solid deposit Is a method for producing packaged cooked rice, wherein the lid-like heat seal part is pressurized and heat-sealed and hermetically packaged after liquefying,
Remarkable that you can cook delicious rice by adding enough cooking water and heating enough that a part of it is blown out during cooking, as well as easy and reliable heat sealing and sealing packaging The industrial utility value is very large.

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Rice 3 Opening part 4 Flange-shaped heat seal part 5 Foaming 6 Solid deposit 7 Rice 8 Liquefaction 9 Lid material film 10 Spray

Claims (4)

After opening the upper part and filling the packaging container provided with the outward flange-shaped heat seal part around the opening part with rice and cooking water, the upper part of the packaging container is covered, and the flange-shaped heat seal In the manufacturing method of packaged cooked rice provided with a lid material film that is pressurized and heat-sealed and hermetically sealed,
After cooking, before pressurizing and heat-sealing the lid material film, water is supplied to the solid deposit adhered to the sealing surface of the flange-shaped heat seal portion during cooking, and the solid deposit After the liquefaction is liquefied, the lid material film is pressurized and heat sealed to the flange-shaped heat seal portion and hermetically sealed and packaged.   When supplying water to the solid deposit adhered to the sealing surface of the flange-shaped heat seal portion, supply water only to the flange-shaped heat seal portion to which the solid deposit adheres, or further The method for producing packaged cooked rice according to claim 1, wherein water is also supplied to the surface of cooked rice in the packaging container.   The method for producing packaged cooked rice according to claim 1 or 2, wherein aseptic packaged cooked rice is produced by performing the process from the rice cooking process to the sealing and sealing process in an aseptic space.   The aseptic packaging cooked rice is produced by providing a sterilization step before the rice cooking step and performing the sterilization step to the sealing and sealing step in an aseptic space. The manufacturing method of the packaged cooked rice described.

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