JPH11171258A - Food packaging method and packing container to be used for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container for sealing and packaging raw foods such as sea foods, keeping the low temperature state before eating them and also keeping the freshness for a long time, cooking by a quick heating means such as a microwave oven without spoiling the delicacy feeling and taste and not rupturing when cooked in the packed state. SOLUTION: In a packaging method and a packaging container in which raw foods 6 kept in the low temperature state and a sheet member 7 impregnated with a liquid necessary for the foods 6 are stored in a container 1 and the oxygen of given volume is introduced therein, and seal section 3-5 is sealed so that the interior is in the sealed state and a valve mechanism 8 is released the seal sections by the internal pressure, the raw foods kept at the low temperature state can be kept in the fresh state for a comparatively long time, and can be heat cooked just in the packaged state by a microwave oven, and the freshness, mouthfeel, taste and flavor of the foods can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging method for packaging raw foods such as fish and shellfish or root vegetables, which can be cooked in a microwave as it is when the food is eaten, and a packaging container for the same. is there.

[0002]

2. Description of the Related Art As such a type of packaging container compatible with a microwave oven, for example, a packaging bag disclosed in Japanese Patent Application Laid-Open No. 8-22897 filed by the same applicant as the present invention and a Japanese Patent Application Laid-Open No. Japanese Patent Application Laid-Open No. 9-40030 discloses a conventional example. In these conventional packaging containers, the release agent is applied to a part of the seal portion, and when heating and cooking in a microwave oven, the pressure in the container increases, and the internal pressure increases. The release agent is peeled off to allow the internal vapor to escape.

[0003] Food materials packaged in these packaging containers are retort foods, frozen foods, chilled foods and the like, all of which are processed foods, and are evacuated for long-term storage until consumption. Packing or freezing means have become essential.

[0004]

As described above, the vacuum packing or freezing means is indispensable in any of the prior arts, so that fish and shellfish, especially crabs and abalones, are brought to a fresh state (living). (Including laid and suspended).

[0005] Usually, many kinds of such foods are processed by heat treatment, and when it is desired to eat fresh foods in ordinary households, they must be purchased at a specialty fish store. In order to maintain alive state even in such a fresh fish store, a special fish cage is required, and the maintenance cost of the fish cage rebounds to the price of seafood and becomes expensive. Have a point.

Accordingly, in the above-mentioned known packaging technology,
To allow seafood ingredients to be sealed and packaged so that they can be kept fresh until cooked for eating;
In addition, there is a problem to be solved in that it can be cooked in a microwave oven while keeping freshly sealed packages.

[0007]

As a specific means for solving the above-mentioned problems, the present invention comprises a raw food material kept in a low temperature state in a container and a sheet member impregnated with a liquid necessary for the food material. A foodstuff compatible with a microwave oven, wherein the food material is provided with a valve mechanism for storing, introducing a predetermined amount of oxygen, sealing the seal portion so that the inside is sealed, and peeling off the seal portion by internal pressure. A packaging method, and a packaging container having a storage portion therein and a seal portion having a predetermined width formed after at least storing the food material, wherein the packaging container has a sheet member impregnated with a liquid together with the food material. An object of the present invention is to provide a food packaging container compatible with a microwave oven, characterized in that it has a configuration in which a predetermined amount of oxygen can be introduced, and a valve mechanism that peels off by an internal pressure is provided in the seal portion.

[0008] The raw ingredients maintained in a low temperature state are:
The additional requirement that the fish and shellfish be stored in the tray and that the valve mechanism is interposed with a weak seal portion or a material that easily peels off is included.

In the present invention, in particular, a raw material of fish and shellfish is kept at a low temperature, a sheet member impregnated with a liquid is stored together, and a predetermined amount of oxygen is introduced to seal the raw material. The raw ingredients can be kept fresh for a relatively long time, and can be cooked by microwave oven in the packaged state, thereby improving the texture and flavor of the ingredients themselves You can do it.

[0010] In the packaging container, a valve mechanism for peeling off by internal pressure is provided at a seal portion having a predetermined width, so that when a microwave is heated and cooked, even if the liquid in the sheet member housed therein evaporates, The valve mechanism is dissociated to release the internal pressure to the outside, and the rupture of the packaging container, that is, the seal portion is eliminated.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Next, the present invention will be described in more detail with reference to the illustrated embodiment. In the first embodiment shown in FIGS. Are formed on a bag or a container having a storage section 2 therein by laminating two synthetic resin films or sheets exhibiting the above, and heat-sealing the four circumferences.

In this case, as the packaging container 1, the bottom seal portion 3 constituting the bottom portion and the side seal portions 4 on both sides are first heat-sealed to form a bag, and the upper seal portion 5 is placed in the storage portion 2. Heat sealing is performed after a predetermined food material 6 and a sheet member 7 having a predetermined thickness are stored.

When heat-sealing the both-side seal portions 4, a valve mechanism 8 having a predetermined width is formed at an appropriate position on both or one of the both-side seal portions. The valve mechanism 8 has a trapezoidal shape in plan view as a whole. When the internal pressure of the storage section 2 increases due to heating during cooking, the valve mechanism 8 separates and communicates with the outside, and discharges internal steam and the like. This prevents the packaging container 1 from bursting, and is configured to be more easily peeled off than the seal portion 4.

The valve mechanism 8 is formed, for example, as a weak seal portion at the same time as the seal portion 4, or by printing or applying a material having weak sealability and heat sealing at the same time as the side seal portion 4. Thus, even if the valve mechanism 8 is present, the inside of the container can be maintained in a sealed or airtight state.

One means for forming the valve mechanism 8 with the weak seal portion is, for example, a halftone (including a mesh) engraved portion corresponding to the shape of the valve mechanism 8 on a part of the heat seal member. The weak seal portion can be formed at the same time as the formation of the side seal portion 4 by partially forming the seal along the halftone dot.

Further, in forming the weak seal for the heat seal member, in addition to the halftone dot formation, for example, a material having low thermal conductivity corresponding to the shape of the weak seal portion may be partially embedded. it can. If the material has low thermal conductivity, even if the seals are simultaneously formed, the sealing performance is inferior due to the lower temperature, and a weak seal portion that is more easily peeled than the side seal portion 4 can be formed.

When the valve mechanism 8 is made of a material having a weak sealing property, an example of the material having a weak sealing property is an olefin polymer. In this case, for example, printing or coating means is used as a means for interposing a material having a weak sealing property, and if the side seal portion 4 is heat-sealed at the same time as sealing, the valve mechanism of the weak seal portion is inevitably provided. 8 are formed.

Before the foodstuff 6 is housed inside the packaging container 1 thus formed, the upper seal portion 5 is in an open state. From the opening, the foodstuff 6 can be used for packaging live crab, for example. First, the crab is put into a suspended state in a low temperature state (0 ° C. or more and 5 ° C. or less), and the sheet member 7 impregnated with a liquid necessary for stored foods such as seawater or salt water is placed in a suspended state. After storing with a certain crab and introducing a required amount of oxygen into the inside, the upper seal part 5 is heat-sealed to a sealed state. Freshness is maintained across.

FIGS. 3 and 4 show a second embodiment. Since the packaging container in this embodiment is substantially the same as that of the first embodiment, only the reference numerals are used and the repeated description of the configuration is omitted. This embodiment is different from the first embodiment only in that the foodstuffs 6 stored in the packaging container 1 are live abalone and that a tray 9 is used.

That is, even when the food material 6 is abalone, when the temperature is low (0 ° C. or more and 5 ° C. or less), the movement becomes extremely slow. Then, the sheet member 7 is impregnated with a liquid such as seawater or salt water in the same manner as described above, and the foodstuffs are stored and stored together in the tray 9 and a required amount of oxygen is introduced into the inside. If the part 5 is heat-sealed and kept in a hermetically sealed state and kept at a low temperature as it is, a fresh state as a food material is maintained for about two weeks.

In any case, since the sheet member 7 is impregnated with the liquid, the interior can be maintained at a predetermined humidity even in a low temperature state, and oxygen is introduced into the interior space. Since the state of oxygen deficiency does not occur in about a week, a living state, that is, a fresh state can be maintained. In the above-described embodiment, crab and abalone have been described. However, the present invention is not limited to this. is there.

The configuration of the packaging container 1 is not limited to the bag shape which seals the four sides as described above, and may be, for example, a material obtained by folding one sheet of material into two and sealing three sides, or a tube. The upper and lower ends of the material may be sealed, or a bag having a bottom such as a Doypack bag, a standing pouch, a bottom rail bag, or a bowl-shaped container may be used. As long as it has a portion that can be sealed, a valve mechanism may be formed in the heat seal portion, and the shape and configuration are not limited.

The synthetic resin film or sheet forming the bag may be made of one kind of single-layer material, a laminated material obtained by laminating a plurality of the same resin materials, a laminated material obtained by laminating a plurality of different materials, Alternatively, a foamable material or the like can be used.

Specific examples of the laminated material obtained by laminating the same type of resin material include PET, CPP, and nylon. Examples of the different types of material include the resin material and aluminum foil (including alumina vapor deposition), paper or non-woven fabric, etc. It is a material that can be laminated.

[0025] The packaging container 1 in which the foodstuffs 6 of the fish and shellfish which have been put into a suspended state or whose movement has become extremely dull as described above can be put on the distribution channel as a product while being kept in a low temperature state. The fresh state is maintained for about two weeks.

When the food is eaten, for example, it is put in a packaged state in a microwave oven and cooked for a predetermined time, the liquid impregnated in the sheet member 7 evaporates by heating, and the pressure in the container increases. The valve mechanism 8 peels off due to the increased internal pressure, and excess internal pressure is released to the outside by communicating with the outside. Therefore, there is no possibility that the packaging container 1 is ruptured.

During the heating and cooking, a part of the pressure is released to the outside. However, since the internal pressure is still high, the food is cooked in the pressure cooker and the sheet member 7 is impregnated. Since the liquid is seawater or salt water, the salt content becomes a kind of seasoning, and a proper seasoning is achieved.

In this cooking, since the fresh seafood is in a kind of steamed state, the taste of the ingredients is confined as it is, unlike the one that is cooked by boiling in a pot or the one that is frozen, The texture and flavor when eating are further improved.

[0029]

As described above, the food packaging method according to the present invention accommodates a raw food material kept in a low temperature state and a sheet member impregnated with a necessary liquid in the food material, in a container. By introducing a predetermined amount of oxygen, sealing the seal portion so that the inside becomes a hermetically sealed state, by providing a valve mechanism that peels off by the internal pressure in the seal portion,
Raw ingredients maintained in a low temperature state can be kept fresh for a relatively long time, displayed in a packaged state at a store, easily purchased by ordinary households, and kept in the packaged state It can be cooked by a microwave oven, thereby providing an excellent effect of improving the texture, taste, and flavor of the fresh food itself.

Further, the packaging container according to the present invention is a packaging container having a storage portion inside and a seal portion having a predetermined width formed after at least the food material is stored therein, and the packaging container contains the food material together with the food material. The structure in which a sheet member impregnated with a liquid and a predetermined amount of oxygen can be introduced, and a structure in which a valve mechanism that peels off due to internal pressure is provided in the seal portion, so that when cooking by heating in a microwave oven, Even if the liquid in the stored sheet member evaporates, the valve mechanism is dissociated to release the internal pressure to the outside, so that there is an excellent effect that the rupture of the packaging container, that is, the seal portion is eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a packaging container according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view of the packaging container according to the first embodiment.

FIG. 3 is a plan view schematically showing a packaging container according to a second embodiment of the present invention.

FIG. 4 is a schematic sectional view of a packaging container according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging container 2 Storage part 3 Bottom seal part 4 Side seal part 5 Top seal part 6 Foodstuff 7 Seat member 8 Valve mechanism 9 Tray

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiro Sakamoto Hokkaido, Sapporo, Japan

Claims (4)

[Claims] 1. A container in which a raw food material kept at a low temperature and a sheet member impregnated with a liquid necessary for the food material are housed in a container, a predetermined amount of oxygen is introduced, and the inside is sealed. A method of packaging foodstuffs compatible with a microwave oven, characterized in that a seal portion is sealed so as to form a seal, and a valve mechanism for peeling off the seal portion by an internal pressure is provided. 2. The food packaging method for a microwave oven according to claim 1, wherein the raw food maintained at a low temperature is fish and shellfish and stored in a tray. 3. A packaging container having a storage portion therein and having a sealing portion of a predetermined width formed after at least food material is stored, wherein the packaging container has a sheet member impregnated with a liquid together with the food material. And a predetermined amount of oxygen can be introduced, and a valve mechanism that peels off by an internal pressure is provided in the seal portion. 4. The food packaging container according to claim 3, wherein the valve mechanism is provided with a weak seal portion or a material that is easy to peel off.