JPH05178377A - Container for electromagnetic cooking apparatus - Google Patents

Abstract

PURPOSE:To heat the boiled rice which has become cold, etc., satisfactorily by the steam and electromagnetic heating applied uniformly to foods in an electromagnetic cooling apparatus by a method wherein the food containing material provided with a water-absorbing layer consisting of water-absorbing sheet is shaped into the form of a bag. CONSTITUTION:A water-absorbing sheet 14 having a predetermined size (e.g. 20cm-30cm) is folded double lengthwise along the middle with its side edges arranged in coincidence, the lower parts of the folded sheets are joined together to make a container 12 as in the form of a bag and the container is provided therein with a food receiving part 16. Prior to use of the bag-like container 12, it is wetted with water and lightly squeezed. The foods F such as the boiled rice which has become cold is put into the container 12 in the as-wetted condition, its free ends 20 are lightly tied together and the container is put into an microwave oven. When the microwave oven is turned on, the water absorbed in the water-absorbing sheet 14 is heated by electromagnetic waves to produce steam and the container 12 is filled therewith, whereby the food F is heated electromagnetically and warmed uniformly by the steam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package for use in an electromagnetic wave cooking utensil such as a microwave oven. More specifically, when heating, reheating, thawing, etc.,
The present invention relates to a package used to wrap an object to be processed.

[0002]

Conventionally, a wrap film made of a synthetic resin such as a vinylidene chloride polymer has been used as a package for an electromagnetic wave cooker such as a microwave oven (hereinafter referred to as "microwave oven"). Is used. That is, the food is covered with the wrap film, and then placed in a microwave oven for heating.

If the food is covered with the wrap film and heated, it is possible to prevent the food from overdrying, but a part of the water content from the food adheres to the inside of the wrap film and the adhered water moves downward. Then, it accumulates near the bottom of the food. If water accumulates in the lower part of the food, the lower part of the food becomes excessively steamed and becomes fuzzy, and on the contrary, the upper part becomes slightly dry and hard, and this imbalance creates a texture. It was the cause of the decrease. Incidentally, for the purpose of preventing the upper part of the food from drying, a small amount of water may be preliminarily adapted to the wrap film, but in this case, the upper part of the food can be prevented from being dried, but still lower. This caused the part to become fuzzy and caused a marked deterioration in the texture of some foods.

In addition, when wrapping a piece of spicy food such as rice or beans in a wrap film or when it has been processed and taken out of the wrap film, the food is often scattered on the wrap film and cannot be collected. It was

Further, the wrap film after heating has increased tackiness, which makes it difficult to separate the wrap film from the food, and makes it difficult to recognize the end (opening) of the film. Took a lot of time to take out.

In addition to the wrap film, a microwave oven container made of a synthetic resin (eg, hydroxybenzoic acid polyester or polyethylene terephthalate) is used. That is, food is put in the container, the lid is closed, and then the food is put in a microwave oven for heating.

However, even in such a container, the balance of the water content in the container is not adjusted, and the above-mentioned problem that the lower portion of the food is excessively steamed and becomes smoky still occurs.

By the way, the sterilization method currently used is a method called electromagnetic wave (microwave) sterilization (Japanese Patent Publication Nos. 60-58669 and 56-56).
No. 54676). That is, it is a method of sterilizing an object by irradiating it with microwaves. With the widespread use of household microwave ovens, there are many cases in which household microwave ovens are used for sterilization.

For example, when a baby drinks milk in a baby bottle, the nipple of the baby bottle is sterilized in a microwave oven in advance. In this case, the nipple is wrapped with wrap film and then placed in the microwave oven, or it is placed as it is. When the microwave oven is turned on in such a state, the nipple is directly irradiated with electromagnetic waves, and the nipple is heated and sterilized.

However, the nipple attached to the baby bottle is usually composed of a rubber (isoprene rubber) composition containing various additives, and during heating, the additive, especially the plasticizer, gradually becomes the nipple. There was a problem of elution on the surface. This is considered to occur because the nipple is overheated because it is directly irradiated with electromagnetic waves. However, even if the additive elutes, the appearance does not change so much, so the mother often does not notice it, and the nipple keeps feeding the baby. As a result, the baby will drink the dissolved additive together with the milk, which is a serious health and hygiene problem for the baby. In addition, many additives are usually bitter, and there is a risk that the baby may dislike milk due to this bitterness.

If the object to be processed is a metal product such as scissors or tweezers, it cannot be used because a spark (spark) which causes a failure of the microwave oven is generated.

The present invention has been made in view of the above circumstances, and an object thereof is a package suitably used in heating, reheating, thawing, lowering, and sterilizing in a microwave oven. Is in the place of providing.

[0013]

A package of the present invention is a package for an object to be processed used in a microwave oven, wherein the package has a water absorbing layer made of a water absorbent sheet. It also has a bag shape.

As in claim 2, a moisture impermeable sheet may be laminated on the outer side of the water absorbent sheet.

It is preferable that a heat-resistant protective sheet is laminated on the outer side of the moisture-impermeable sheet.

The term "sheet" as used herein includes a film-like material.

It should be noted that an electromagnetic wave called microwave is used in a microwave oven, and a substance absorbing the electromagnetic wave is self-heated dielectrically, and the substance is heated by a heat ray from a heating element like an oven. Not a thing. Therefore, in a microwave oven, the word "heating" is not suitable at all, and an appropriate word should be used originally, but here, for convenience, the word "heating" will be used for explanation.

The package of the present invention may be formed into a bag shape by using two water-absorbent sheets (), and one water-absorbent sheet may be folded substantially evenly and then formed into a bag shape. What you did () is acceptable.

The "bag-shaped" state is, for example, the case described above, and the water absorbent sheets (S), (S
When the plane shape of ′) is a polygonal shape such as a triangular shape or a quadrangular shape, at least two sides thereof are joined as shown in FIGS. A storage space (K) for storing objects is formed between both sheets. If the storage space is circular or semicircular, as shown in FIGS. Are joined together to form the storage space (K). In addition, the two-dot chain line in the figure shows the joining portion.

Further, in the above case, when the water absorbent sheet (S) is folded in half and the planar shape is a polygonal shape such as a triangular shape or a quadrangular shape, FIG. )-(B), the storage space (K) is formed by joining at least one side adjacent to the bent side (10). It should be noted that the size is not particularly limited, and the size (area) of the turntable of the microwave oven is substantially the same as that of each company, and it is sufficient that it has a size corresponding thereto.

The water absorbent sheets may be joined to each other by any method such as a stitching method and an adhesive method (including a hot melt adhesive).

The water absorbent sheet that can be used in the present invention is not particularly limited, and conventionally known ones can be used. Specific examples thereof include pulp such as crepe tissue paper and Japanese paper, cotton non-woven fabric, cotton knitted fabric, rayon non-woven fabric, rayon knitted fabric, and sheet made of cotton or a mixture of rayon and pulp. Further, a synthetic resin such as polyester or polypropylene may be mixed to the extent that water absorption is not hindered. When a synthetic resin is mixed, there is an advantage that the water absorbent sheets can be joined together by a heat welding method (heat sealing method).

In addition, a multi-layered water-absorbent sheet may be formed by sandwiching a highly water-absorbent polymer such as polyvinyl alcohol-based, cellulose-based or acrylic acid-based polymer from both sides with a sheet made of cotton or pulp. At this time, a resin binder may be used so that the superabsorbent polymer does not easily move between the sheets on both sides (so that it does not disperse), or the polyethylene powder is preliminarily superabsorbent. It may be mixed with a polymer and sandwiched between the sheets, and then heat-sealed to be integrated. The range in which the superabsorbent polymer is distributed in the water-absorbent sheet is appropriate in the range excluding the edges because the superabsorbent polymer may spill from the edges, but the drop of the superabsorbent polymer If there is no concern, the super absorbent polymer may be present on the entire surface of the absorbent sheet.

As described above, when the super absorbent polymer is used, the water retention amount in the water absorption layer becomes high, that is, a large amount of water can be contained, so that the treatment time can be lengthened.

As the non-moisture permeable sheet to be laminated on the outer side of the water absorbent sheet, a sheet which does not allow moisture (vapor) to pass at all or has little moisture can be used. Mainly, polyester, polypropylene, A synthetic resin sheet made of polyethylene or the like can be preferably used. Further, commercially available wrap films such as Kurewrap (trade name, Kureha Chemical Industry Co., Ltd.), Saran wrap (trade name, manufactured by Asahi Kasei Co., Ltd.) may be used.

However, the synthetic resin sheet, particularly the polyethylene sheet, is generally weak to heat and may not melt during heating in a microwave oven. for that reason,
When a non-moisture permeable sheet made of a synthetic resin is laminated on the outer side of the water absorbent sheet, it is preferable to further laminate a heat resistant protective sheet on the outer side of the non-moisture permeable sheet. Conversely, when the heat-resistant protective sheet is provided, a synthetic resin sheet having a low melting point can be used, and the manufacturing cost can be suppressed. Of course, if a non-moisture permeable sheet made of a material showing sufficient heat resistance in a microwave oven is used, such a heat resistant protective sheet is not necessary.

Examples of the heat-resistant protective sheet include knitted cotton fabric, non-woven cotton fabric, pulps and rayon sheets.
It is not limited by this.

The "heat resistance" of the heat resistant protective sheet herein means the property that it exhibits resistance and is stable to at least a temperature exposed to a microwave oven.

The usage method and usage state of the package of the present invention will be briefly described below. First, wet the package with water, and then squeeze it lightly. As a result, water is retained in the water absorbing layer made of the water absorbing sheet, and the water absorbing layer becomes the water retaining layer. The object to be treated is housed in the package in such a state, the object to be treated is wrapped with the package, placed in a microwave oven, and heated.

During heating, the emitted electromagnetic waves heat the water-absorbing sheet, whereby the water retained in the water-absorbing layer gradually changes to water vapor. After 15 to 30 seconds, the inside of the package is filled with steam, and the object to be treated is steamed with this steam. Since the package covers the entire circumference of the object to be processed, the object to be processed is uniformly steamed. At the same time, the object to be processed is directly heated by the electromagnetic waves that have passed through the package and reached the object to be processed. The effects of both the uniform steaming of the object to be treated and the heating effect of the electromagnetic waves are combined.For example, rice is fluffy like freshly cooked and tempura or croquette. The result is freshly fried.

Further, even if moisture is released from the object to be treated during heating, this moisture is quickly absorbed by the package,
There is no concern that water will accumulate in the lower part of the object to be treated, and the problem that the lower part will be excessively steamed and smoky will not occur.

Since the package of the present invention has a bag shape,
It is easy to store and take out the object to be processed, and even when handling smashed food such as rice and beans, there is no concern that the food will be scattered and uncollectible.

Further, after the heat treatment, no increase in tackiness is observed when a synthetic resin wrap film is used, and the take-out port (opening port) can be found relatively easily to take out the food. There is no need to worry about it.

The wrapping in the above-mentioned package may be performed immediately before the treatment in a microwave oven. However, the object to be treated should be wrapped in the package before being stored in the freezer. I don't care. That is, water is contained in the water-absorbent layer of the water-absorbent sheet of the package, and after wrapping the frozen food such as pork mai and pork bun in this water-retaining state,
Store in freezer. This is preferable because it eliminates the need for water to be included in or wrapped in the object to be processed, and the object can be immediately processed in the microwave oven after being taken out from the freezer.

When the package of the present invention is used to sterilize an object to be treated, such as a nipple of a baby bottle, the method of use described above can be used without any particular change in the method of use. That is, the water absorbent sheet is made to hold water, and then the article to be processed is wrapped and put in a microwave oven.

During heating, since the object to be treated is covered with the package having the water retaining layer, the object to be treated is exposed to the steam emitted from the water retaining layer and uniformly steamed from the surroundings. Is heated. For the temperature at this time, add vapor pressure correction,
It is expected to be about 100 to 120 ° C. As a result, the article to be treated will be sterilized without falling into an overheated state, and even if the article to be treated is a rubber composition having poor heat resistance, such as a nipple, the package of the present invention is used. By using it, it is possible to easily sterilize the additive without eluting it. Of course, direct sterilization by electromagnetic waves passing through the package can be expected at the same time.

There is no particular limitation on what can be sterilized by using the package of the present invention, and in addition to the rubber composition as described above, glass instruments (syringe, beaker, test tube), etc. Anything can be used. In particular, when it is used for a material having poor heat resistance, the use of the package of the present invention is preferable because the drawback can be compensated for. Further, it is said that a metal product cannot be used because a spark (spark) is generated in a microwave oven, but when wrapped in the package of the present invention, a part or most of electromagnetic waves are formed by a water-absorbent sheet. Since it is absorbed by the water-retaining layer, the amount of electromagnetic waves directly radiated is reduced, and metal instruments such as scissors and tweezers can be sterilized.

Further, a metal sheet such as an aluminum sheet may be laminated on the inside of the water absorbent sheet so that the heat generated on the water absorbent sheet side is positively transferred to the object to be treated. In this case, the water absorbent sheet and the metal sheet may be sewn together to be integrated, or may be adhered and integrated by using a resin such as polyethylene.

Further, since electromagnetic waves hardly pass through the metal sheet, the object to be treated is sterilized only by the heat transmitted from the water absorbent sheet. However, a hole having a diameter of about 1 mm to 5 mm is opened in the metal sheet. It is also possible to add an element such that a part of the electromagnetic wave is passed through this hole and the electromagnetic wave is directly irradiated. In this case, a greater sterilization effect can be expected, but as the proportion of the electromagnetic waves directly irradiated increases, there is a risk that the physical properties of the object to be processed will be changed or the contained components will be eluted. On the contrary, it is improved, so it cannot be increased unnecessarily. When the holes are provided, the area ratio is preferably about 5 to 20%.

The time required for sterilization using the package of the present invention varies depending on the size and material of the object to be treated and cannot be generally stated, but it is about 2 to 5 minutes.

A package (a package according to claim 2) in which a non-moisture permeable sheet is laminated on the outside of the water absorbent sheet,
The object to be processed can be efficiently heated. That is,
The moisture retained in the water absorbent sheet and the moisture released from the object to be treated can be retained inside the package without being released to the outside of the package. Therefore, as compared with the case where the non-moisture permeable sheet is not provided, the steaming action per unit time is improved.

In the package (the package of claim 3) in which the heat-resistant protective sheet is laminated on the outer side of the non-moisture permeable sheet, the non-moisture permeable sheet may be partially melted during the heat treatment. However, since it is protected by the heat-resistant protective sheet on the outside, there is no possibility that the inside of the microwave oven will be contaminated by the molten resin.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Example 1 of Claim 1 (1) A package (12) shown in FIG. 1 (b) is composed of a water absorbent sheet (14) (unit weight: 35 g / m ² ) made of a non-woven fabric of 100% cotton. is there. That is, as shown in FIG. 1 (a), one water-absorbent sheet (14) having a size of 20 cm in length × 30 cm in width is evenly folded and overlapped at a center line C extending in the vertical direction, and the lower part is attached. It is sewn into a bag shape. As a result, a storage section (16) for storing the object to be processed is formed inside. Note that FIG.
The chain double-dashed line in (b) indicates the stitched portion.

Before the object to be treated is stored in the storage section (16) of the package (12), water is applied to the package (12) and then squeezed lightly to wet it. Accordingly, the water absorbing layer made of the water absorbing sheet (14) becomes the water retaining layer. An object to be treated (F) such as frozen rice is stored in the package (12) in such a water-retaining state, and as shown in FIG. 2, the free ends (20), (20) of the package (12). ) Lightly tie the comrades together and place them on the turntable (T) in the microwave.

When the microwave oven is turned on in this state, the electromagnetic waves emitted heat the water absorbing sheet (14), whereby the water content of the water retaining layer in the water absorbing sheet (14) gradually changes to water vapor. .. After 15 to 30 seconds, the package (12) is filled with steam, and the object (F) to be processed is steamed with this steam. Since the package (12) covers the entire periphery of the object to be processed (F), the object to be processed (F) is uniformly steamed. Further, since the water or oil content discharged from the article to be treated (F) is promptly absorbed by the packaging body (12), it is possible that water is accumulated in the lower portion of the article to be treated (F) as in the conventional case. There is no concern about this, and only a part of the object to be treated (F) will not be excessively steamed. Further, the object to be treated (F) is a package (1
It is also directly heated by the electromagnetic waves that have passed through 2).

In this way, the object to be treated (F) is combined with the steaming effect from the package (12) and the heating effect directly received from electromagnetic waves, and for example, rice is fluffy like freshly cooked, croquette or tempura. The result is a freshly fried product.

Since the package (12) of the present invention has a bag shape, it is easy to store and take out the object (F) to be processed,
Even when handling small pieces of food such as rice and beans, there is no concern that the food will be scattered and uncollectible. Further, as in this embodiment, if the free ends (20) and (20) of the package (12) are tied together,
It becomes easy to take out the object to be processed (F) after the processing.

A sterilization test was conducted using the above package (12). That is, the nipple (made of isoprene rubber) of a baby bottle is put in the storage part (16) of the package (12) in the water-retaining state, the nipple is wrapped in the package (12), and then the nipple is placed in a microwave oven. It was stored and the switch was turned on (electromagnetic wave irradiation time: 3 minutes). As a comparative example, the nipple in the same state without being wrapped in anything was put in the microwave oven and the switch of the microwave oven was turned on.

As a result, there was no change in appearance in either the case (Example) wrapped in the package (12) or the case not wrapped (Comparative Example), but the difference was obvious when touched by the tongue. I was there. That is, the comparative example seemed to be bitter and the additives were eluted or the physical properties were changed, but the example did not have such bitterness.

The treated nipple (Example) was rubbed on the agar medium several times and cultured according to a conventional method.
No colonies formed on the agar medium, confirming that the nipple was completely sterilized. As described above, the sterilization using the package of the present invention is caused by both the effects of humidification and heating, so that even spore-forming bacteria can be killed (wet spore-forming bacteria at high temperature). If you do so, the shell will become fuzzy, and it will be easier to kill it).

A sterilization test was conducted in the same manner as above using metal tweezers as the sterilization object instead of the nipple. As a result, the tweezers could be sterilized without generating sparks.

By using the package (12) and treating a baby bottle containing milk with the nipple attached, the nipple can be sterilized and the milk can be heated at the same time.

Another embodiment (2) of claim 1 A bag-shaped package (12 ) according to the present embodiment, as shown in FIG. 3, is provided inside a water absorbent sheet (14) made of 100% cotton nonwoven fabric. The aluminum film (15) is laminated via the adhesive layer (32) made of polyethylene.

The method of using this package (12) is not particularly different from the other examples. That is, water is sprinkled on the outside of the package (12) and then lightly squeezed. This allows
The water absorbing layer of the water absorbent sheet (14) is made to contain water to form a water retaining layer. Then, the object to be treated (F) such as a nipple of a baby bottle is put in the storage portion formed in the package (12), the periphery is wrapped with the package (12), and then placed in a microwave oven.

During heating, the electromagnetic waves emitted heat the water in the water absorbing sheet (14), and the temperature in this portion reaches 100 to 120 ° C. with the vapor pressure correction. This heat is transmitted through the aluminum film (15) and quickly reaches the object to be treated (F) housed inside, and the object to be treated (F) is heated by the object to be sterilized as a result. become. If the aluminum film (15) is a non-porous film, the sterilization is almost sterilization by heat, but if sterilization by electromagnetic wave irradiation (electromagnetic wave sterilization) is desired, the area ratio is 5 to 20%. The holes of the aluminum film (1
It may be installed in 5).

When the aluminum film (15) is laminated on the inside of the water absorbent sheet (14) as described above, electromagnetic waves are blocked by the aluminum film (15), so that the object to be treated (F) is processed. Irradiation of electromagnetic waves is drastically reduced. This makes it easier to make boiled eggs that were difficult to make in the microwave oven by using the package (12) (When a raw egg is heated in the microwave oven, electromagnetic waves pass through the shell and heat the inside directly. Therefore, the raw egg will burst during the process).

Embodiment (3) of Claim 2 The bag-like package (12) in this embodiment is different from the embodiment (3) in that a moisture-impermeable synthetic resin sheet is laminated on the outer side of the water absorbent sheet. It is only different from that of 1).

FIG. 4 is a partially enlarged sectional view of the package (12) in this embodiment. As shown in the figure, packaging (12)
Is a water absorbent sheet made of 100% cotton non-woven fabric (14)
A non-moisture permeable synthetic resin sheet (24) made of polypropylene and having the same shape and size as the water absorbent sheet (14) is laminated on the outer side of the fabric weight (35 g / m ² ). The two may be bonded on the entire surface, may be bonded only on the peripheral portion, or may be bonded in spots.

When the package (12) is used, an appropriate amount of water is put in the package (12) and it is confirmed that the water absorbent sheet (14) has sufficiently absorbed the water. , Discard the water that you put. A package in such a water retaining state (12)
In the same manner as in Example (1), the object to be treated is stored, the free ends of the package (12) are lightly connected, and the package is placed on the turntable in the microwave oven.

When the microwave oven is turned on in this state, most of the emitted electromagnetic waves pass through the synthetic resin sheet (24) and heat the water in the water retaining layer of the water absorbent sheet (14). As a result, the moisture gradually changes to steam, the inside of the package (12) is filled with steam, and the object to be treated is steamed with this steam. Water absorbent sheets (14)
The electromagnetic wave that has passed through is directly irradiated to the object to be processed, which heats it.

Since the packaging body (12) has a non-moisture permeable synthetic resin sheet (24) laminated on the outer side, the moisture retained in the water absorbent sheet (14) or the moisture discharged from the object to be treated The package (1) without escaping to the outside of the package (12).
In 2), it contributes to the steaming action on the material to be treated. Therefore, by providing the non-moisture permeable synthetic resin sheet (24), the steaming action of the object to be processed is enhanced, and when the object to be processed is sufficiently steamed, for example, when the object to be processed is thick, It is preferable to use the packaging body (12) of the present embodiment when treating frozen rice, gyoza, choux mai, pig man, and the like.

If steam leakage is completely prevented as in the present embodiment, the package (12) may expand like a balloon and puncture during heating. In order to prevent this, the non-moisture permeable synthetic resin sheet on the outside (24)
It is also possible to provide several pinholes (gas vent holes) at arbitrary locations.

Another embodiment (4) of claim 2 The package (12) in this embodiment is a water absorbent sheet (14).
And a non-breathable polypropylene synthetic sheet (36).

As shown in the partially enlarged sectional view of FIG.
The water absorbent sheet (14) is made of cotton non-woven sheets (32), (3
A super absorbent polymer (34) mixed with powdery polyethylene is sandwiched between 2), and then heat is applied to melt the mixed polyethylene, and a cotton non-woven sheet (3
2), (32) and the super absorbent polymer (34) are integrated.

The water absorbing layer in the package (12) having the above structure has a high water absorbing ability due to the super absorbent polymer (34) and can contain a large amount of water. Thus, for example, when processing raw beans or other foods for which steaming time is required to be long, the package (12) of the present embodiment is convenient.

Embodiment (5) of Claim 3 In the bag-like package (12) of this embodiment, the heat-resistant protective sheet is laminated on the outer side of the non-moisture permeable synthetic resin sheet in terms of constitution. In this respect, the only difference is that of Example (2), that is, a heat-resistant protective sheet (30) made of rayon nonwoven fabric, a moisture-impermeable synthetic resin sheet (2) made of polyethylene.
6), and 50% by weight of pulp and 50% by weight of polyester (fibrous), and water-absorbent sheets (14) formed by papermaking are sequentially laminated, and then formed into a bag shape.

That is, as shown in FIG.
Heat-resistant protective sheet with a size of 0 cm x 30 cm (30)
A synthetic resin sheet (26) of the same size is laid on top of this, and a water absorbent sheet (14) is further laid on it to form three layers. This is heated to slightly melt the synthetic resin sheet (26) of the intermediate layer, and pressure is applied from above to bond the three layers to each other. This joining (heat welding) may be performed over the entire surface of each sheet, or may be performed only at the peripheral portion.

As shown in FIG. 6B, the composite sheet (M) thus integrated is located at the center line C extending in the longitudinal direction of the composite sheet (M) and at the water absorbent sheet (14). ), So that it is on the inside, and fold them evenly so that they overlap each other.
4), (14) The parts where the two are in contact with each other are welded together to form a bag (see FIG. 6 (c)). As described above, since the water absorbent sheet (14) contains 50% by weight of polyester, the water absorbent sheets (14) can be easily heat-welded to each other. The two-dot chain line in FIG. 6 (c) indicates the heat-welded portion.

When the packaging body (12) is used, an appropriate amount of water is put into the packaging body (12) in the same manner as in Example (3) so that the water-absorbent sheet (14) is sufficiently filled. After confirming that the water has been absorbed, throw out the water. An object to be treated is stored in a package (12) in such a water-retaining state, the object to be treated is wrapped in the package (12), and then placed on a turntable in a microwave oven.

When the microwave oven is turned on in this state, most of the electromagnetic waves emitted are protected by the heat-resistant protective sheet (3
0), passing through the synthetic resin sheet (26), water absorbent sheet (1
Heat the water in the water retaining layer in 4). This allows
The moisture gradually changes to steam, the package (12) is filled with steam, and the object to be treated is steamed with this steam. In addition, the electromagnetic waves that have passed through the water absorbent sheet (14) are
The object to be processed is directly irradiated and heated.

Since the moisture permeable synthetic resin sheet (26) is laminated on the outer side of the package (12), the moisture retained in the water absorbent sheet (14) or the moisture discharged from the object to be treated The package (1) without escaping to the outside of the package (12).
In 2), it contributes to the steaming action on the material to be treated. Therefore, by providing the non-moisture permeable synthetic resin sheet (26), the steaming action of the object to be treated is enhanced.

When treating an object to be treated containing oil such as fish such as eels and saury, the oil oozes out during the treatment, so the temperature inside the microwave oven is 1
It becomes a high temperature exceeding 20 ° C. At the same time, the package (12) is exposed to such a high temperature. Even if the intermediate layer synthetic resin sheet (26) may be melted by the heat, the outermost layer is a heat-resistant protective sheet (30).
Since it is composed of, the melted resin does not fall down and the inside of the microwave oven is contaminated.

[0074]

According to the package of the present invention, since the object to be treated is covered with the package in a water-retaining state during heating, the effect of steaming uniformly performed on the object to be treated,
Combined with the effect of heating performed directly by electromagnetic waves, for example, rice will have a plump finish like freshly cooked.

Further, even if moisture is released from the article to be treated during heating, this moisture is absorbed by the package, so there is no concern that water will accumulate in the lower part of the article to be treated, and the lower portion is excessive. The problem of being steamed and becoming fuzzy cannot occur.

Since the package of the present invention has a bag shape,
It is easy to store and take out the object to be processed, and even when handling smashed food such as rice and beans, there is no concern that the food will be scattered and uncollectible.

By using the package of the present invention, it is possible to sterilize the object to be treated while minimizing changes in the physical properties of the object to be treated and elution of the components contained in the object to be treated. Furthermore, metal products such as scissors and tweezers can be sterilized without generating sparks.

According to the package of claim 2, the water retained in the water absorbent sheet and the water released from the object to be treated are
Since it can be held inside the package without letting it escape to the outside of the package, the object to be treated can be sufficiently steamed and heated.

According to the package of the third aspect, even if the moisture-impermeable sheet is heated and melted during heating, the moisture-proof sheet is protected by the protective sheet on the outside thereof, so that the inside of the microwave oven is protected. There is no danger of getting dirty.

[Brief description of drawings]

FIG. 1 shows a packaging body of Example (1), (a) is a diagram showing a state in which a water absorbent sheet is folded in half, and (b) is a diagram showing a state in which it is formed into a bag shape. is there.

FIG. 2 is a perspective view showing a usage state of the package of FIG.

FIG. 3 is a cross-sectional view of the package of Example (2), in which the thickness of the package is exaggerated.

FIG. 4 is a partially enlarged cross-sectional view of a package of Example (3).

FIG. 5 is a partially enlarged cross-sectional view of a package of Example (4).

FIG. 6 shows a package of Example (5), (a) shows a state in which a water-absorbent sheet, a moisture impermeable sheet and a heat-resistant protective sheet are superposed, and (b) shows a composite sheet composed of three sheets. Shows a folded state, and (c) shows a finally formed bag-shaped package.

FIG. 7 is an explanatory diagram showing a state in which two sheets (planar polygons) are overlapped to form a bag.

FIG. 8 is an explanatory diagram showing a method of stacking two sheets (plane circular or semicircular) to form a bag.

FIG. 9 is an explanatory diagram showing a state in which one sheet is folded in half and then formed into a bag shape.

[Explanation of symbols]

 F ... Object to be treated 12 ... Package 14 ... Water absorbent sheet 16 ... Storage section 24, 26 ... Synthetic resin sheet 30 ... Heat-resistant protective sheet

Claims (3)

[Claims] 1. A package for an object to be processed, which is used in a chamber of an electromagnetic wave cooker such as a microwave oven, wherein the package has a water absorbing layer made of a water absorbent sheet and has a bag shape. A package for an electromagnetic wave cooker, which is characterized in that 2. A package for an electromagnetic wave cooker according to claim 1, wherein a moisture impermeable sheet is laminated on the outer side of the water absorbent sheet. 3. The package for an electromagnetic wave cooker according to claim 2, wherein a heat-resistant protective sheet is laminated on the outer side of the moisture impermeable sheet.