JP3712564B2 - Food and beverage cooking container and food and beverage package - Google Patents

Description

【００４０】
小孔部分をポリアミド層でラミネートした飲食品パッケージは、７日経過して変化の兆しが現れ始め、１０日間程度は保存可能であったのに対して、小孔部分を覆わずにそのままとした飲食品パッケージに於いては、３日経過後から変化が認められ、５日後には食し難いものになった。このように、本発明の保存に対する効果が認められた。
【００４１】
また、生ハンバーグを封入した時点で、上部のポリアミド層を除去して、該飲食品パッケージを高周波出力５００Ｗの電子レンジに入れ、タイマーを４分３０秒にセットしてスイッチを入れた。１分１０〜１分２０秒経過時点より徐々にハンバーグ自身が保有する含有水分が加熱により蒸発し始め、次第にパッケージ内に水蒸気が拡散し、パッケージは膨張し始めた。更に、約１分３０秒経過時にはパッケージ内部の圧力は約１．１５気圧、温度１１５℃程度まで上昇し、パッケージは膨張してパンパンの状態となった。間もなく、パッケージ上面側で張力が最も大きく作用する小孔の一つが開裂した。その開裂した空隙より内部の余分圧力は外部に放出され、パッケージ内部は圧力約１．１５気圧程度に保つた状態で更に、１分５０秒〜１分４０秒間加熱を続けた。その結果、熱の通り難い挽き肉を使用したハンバーグにも拘わらず、高湿度、高温度、高圧力下で生ハンバーグは均一に加熱処理され、適度に油が絞られたソフト感のあるハンバーグに仕上がった。
【００４２】
【発明の効果】
本発明は、飲食品調理用容器及び該容器に飲食品を封入した飲食品パッケージである。この飲食品パッケージは、手軽に電子レンジなどを利用して調理ができ、しかも、パッケージ毎の調理品の品質も一定で、風味も普通に調理したものとほとんど遜色のないものが得られる。更に、該飲食品パッケージは、飲食品の腐敗を抑えて比較的長期にわたって保存できるものである。
【図面の簡単な説明】
【図１】図１は、飲食品パッケージの一例を示す図である。（ａ）は平面図、（ｂ）は側面図である。
【図２】図２は、飲食品パッケージの他の例を示す図である。（ａ）は平面図、（ｂ）は側面図である。
【図３】図３は、飲食品パッケージの他の例を示す図である。（ａ）は平面図、（ｂ）は側面図である。
【符号の説明】
１、２１、４１ 飲食品調理用容器
２、２２、４２ 上部
３、２３、４３ 底部
４、２４、４４ 上部下層
５、２５、４５ 底部内層
６、２６、４６ 底部外層
７、２７、４７ 飲食品
８、２８、４８ 調味料
９、２９、５０ 上部上層
１０、３０ 上部中間層
１１、１２、３１、３２、５１、５２ 小孔
１３、３３、５３ 把手
４９ 小片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container for cooking food and drink that can be stored for a relatively long period of time and can be cooked in a microwave oven, and a food and drink package in which the food and drink are enclosed in the container.
[0002]
[Prior art]
The eating habits in recent years have changed greatly. Recently, attention has been focused on the use of uncooked ingredients in a package that can be easily cooked in a short time using a microwave oven. Since it is cooked immediately before eating, it is fresh, unlike retort food that only warms the already cooked food, and has a feature that there is almost no difference in flavor from a freshly cooked food.
[0003]
When cooking in a microwave oven, the pressure inside the food and beverage package rises during cooking, the package body explodes, cooking itself cannot be done smoothly, and problems such as contaminating the inside of the microwave oven and safety issues have been pointed out Various packaging materials for food and beverage packages for microwave ovens have been proposed. Among them, the present inventor has made various studies paying attention to a film sheet provided with small holes and laminated with a film sheet having no small holes (for example, JP-A-10-147381).
[0004]
When enclosing food and drink in the packaging material and heating in a microwave oven, if the pressure rises above a certain value, the film layer without holes corresponding to the holes of the film layer with holes is cleaved. Release the excess pressure. And it has the characteristic that it can cook at the optimal temperature and pressure for each food and drink.
[0005]
[Problems to be solved by the invention]
Although the technology has a feature that it can release extra pressure during microwave processing and can cook at the optimum temperature and pressure for each food and drink, it has small holes, so the small holes From the air, oxygen in the air permeates into the food and beverage package. As a result, it is pointed out that the food and drink in the container has been corrupted and cannot be stored for a long time. The present invention solves this problem and provides a food and beverage container and a food and beverage package for cooking in a microwave oven that can be stored for a relatively long period of time and that is simple, easy, and tasty. It is.
[0006]
The gist of the present invention is that the upper layer is a film sheet having a low oxygen permeability in the upper layer, the intermediate layer is a film sheet having a low oxygen permeability having at least two small holes, and the lower layer is a three-layer laminated polyethylene film sheet. A polyethylene film sheet of the same quality as that constituting the upper lower layer and a film sheet having a low oxygen permeability are laminated , and the polyethylene layer is arranged inside the bottom. A container for cooking foods and beverages, characterized in that an upper layer film sheet having a low oxygen permeability is laminated so as to be peelable.
[0008]
In the food and beverage container of the present invention, the film sheet having a low oxygen permeability is selected from the group consisting of a polyamide film sheet, a film sheet made of a saponified ethylene and vinyl acetate copolymer, and a polyvinylidene chloride film sheet. It consists of at least one kind .
[0009]
Furthermore, the upper layer is a film sheet having a small oxygen permeability, the middle layer is a film sheet having a small oxygen permeability having at least two small holes, and the lower layer is a three-layer film sheet in which polyethylene film sheets are laminated. And the bottom part is configured by laminating a polyethylene film sheet of the same quality as that constituting the upper lower layer and a film sheet having low oxygen permeability , and the polyethylene layer is arranged inside the bottom part. It is a food / beverage food container, and is a food / beverage food package in which a food / beverage food container is enclosed in a food / beverage food cooking container, wherein an upper layer film sheet having a small oxygen permeability is releasably laminated. Here, the film sheet having low oxygen permeability is selected from a polyamide film sheet, a film sheet made of a saponified product of ethylene and vinyl acetate copolymer, and a polyvinylidene chloride film sheet.
[0010]
The basic configuration of the container for cooking food and beverage according to the present invention is such that a film sheet having a small oxygen permeability provided with at least two small holes and a polyethylene film sheet are laminated and a polyethylene layer is disposed in the lower layer, and the upper part is formed. The bottom is a container in which a polyethylene film sheet of the same quality as that used for the lower layer above and a film sheet with low oxygen permeability are laminated so that the polyethylene layer is on the inside. A film sheet with a low permeability is further laminated on a film sheet with a low permeability, or a small piece of a film sheet with a low permeability to oxygen is releasably coated on the small holes. It is. What enclosed food / beverage products in this container is a food / beverage product package.
[0011]
When the food and drink in the container for cooking food and drink is to be stored for a long period of time, it is necessary to prevent permeation of oxygen in the air and prevent corruption. In order to suppress the permeation of oxygen into the container, the container is preferably made of a material having a low oxygen permeability.
[0012]
From this point of view, in the present invention, a film sheet having a low oxygen permeability is used on the surface of a container for cooking food and drink. Specifically, it is selected from a film sheet of a polyamide film sheet, a polyvinylidene chloride film sheet, and a saponified product of ethylene / vinyl acetate copolymer (sold under the trade name of EVAL). Among these, the polyvinylidene chloride film sheet is expensive and may cause dioxin generation, so it is preferably selected from a film sheet of a saponified product of polyamide and an ethylene / vinyl acetate copolymer.
[0013]
The container for cooking foods and beverages of the present invention is, for example, the tray-shaped one shown in FIG. 1 is shown as an example for convenience of explanation, and the present invention is not limited to this, and there may be a bag shape or the like. A food / beverage cooking container 1 and its bottom 3 are filled with a food / beverage 7 and a seasoning 8, and the top is sealed with an upper lid 2. The upper lid 2 is a three-layer sheet in which the upper layer 9 is a film sheet having a small oxygen permeability, the intermediate layer 10 is a film sheet having a small oxygen permeability having two small holes, and the lower layer 4 is a polyethylene film sheet. The size of the small holes is 4 to 10 μm in diameter. The bottom 3 is a tray. The bottom 3 is composed of a polyethylene film sheet on the inside 5 and a film sheet having a small oxygen permeability on the outside 6.
[0014]
As the film sheet having a low oxygen permeability, a polyamide film sheet, a polyvinylidene chloride film sheet, or a saponified film sheet of an ethylene / vinyl acetate copolymer is used. These three film sheets can be used in appropriate combination. For example, a polyvinylidene chloride film sheet may be used for the upper upper layer 9, and a polyamide film sheet may be used for the upper intermediate layer 10 and the outer side 6 of the bottom, and a saponified ethylene / vinyl acetate copolymer may be used for the upper upper layer 9. And a polyamide film sheet may be used for the upper intermediate layer 10 and the outer side 6 of the bottom. Further, a polyamide film sheet may be used for the upper upper layer, the upper intermediate layer, and the outer side 6 of the bottom.
[0015]
In FIG. 1, although there may be only one small hole in the film sheet having low oxygen permeability of the upper intermediate layer 10, at least two small holes are provided. In the case of one small hole, if the one small hole part does not cleave for some reason, the food and beverage package may explode in the microwave oven, so provide at least two small holes This is to suppress the explosion.
[0016]
The size of the small holes in the film sheet is preferably 4 to 10 mm in diameter. When the diameter of the hole is smaller than 4 mm, the pressure at which the film sheet is cleaved varies. If variations occur in the tearing of the film sheet, as a matter of course, the quality of the food and drink is affected, and there are cases where the food sheet is cooked well or not fully cooked. In order to prevent this, the diameter of the small hole is preferably 4 mm or more. On the other hand, if the diameter of the small hole is too large, the pressure in the package is completely released, and it becomes difficult to adjust the pressure in the package.
[0017]
As described in the embodiment of FIG. 1, the food and drink cooking container uses a film sheet having a low oxygen permeability on the outer surface of the container. Therefore, by suppressing the permeation of oxygen in the air, It has the effect of preventing oxidation of food and drink by oxygen in the air.
[0018]
In the tray-shaped food and drink cooking container shown in FIG. 1, the container without the upper layer 9 of the upper lid 2 has a film sheet having a low oxygen permeability disposed outside the container. Although the permeation of water is considerably suppressed, a small hole is provided, so oxygen permeates into the container through the polyethylene film sheet from this small hole, and the food and drink in the container is spoiled by oxygen, and long-term storage is possible. It is difficult.
[0019]
In order to prevent such food and drink in the container from being spoiled, a film sheet having a small oxygen permeability on the film sheet having small holes of the food and drink package, for example, a polyamide film sheet, an ethylene / vinyl acetate copolymer A saponified film sheet or a polyvinylidene chloride film sheet is laminated so as to be peelable. Further, instead of laminating the entire upper surface of the container, only the small hole portion may be releasably covered with a small piece of a film sheet having low oxygen permeability.
[0020]
In order to manufacture the food / beverage product package of the present invention, first, a small hole is made in a film sheet having low oxygen permeability. In general, a mechanical method, that is, a method of punching with a blade is known as a method for efficiently opening small holes in plastic. However, the mechanical punching method cannot be applied to thin film sheets. In the present invention, a method of making a small hole by applying a laser beam is adopted.
[0021]
When drilling is performed by laser beam processing, work pieces, dust, or smoke is generated, and these need to be removed as appropriate. In general, the vacuum is removed by suction. Small pieces cut out to make holes in the film sheet with laser light are generated and removed by vacuuming. At the same time, dust and smoke and soot are generated, and these are also removed by vacuuming. A jig for pulling in vacuum is provided.
[0022]
By-products are sucked and removed by the jig, and at the same time, a part of the film sheet is brought into contact with the jig to perform laser light processing. At this time, the laser beam is first irradiated onto the jig contact portion, and then moved along the outline of the hole to be drilled. The laser beam is irradiated to the first irradiated position. finish. Furthermore, the temperature of the jig is set to at least 30 ° C. or less. The temperature of the jig is preferably 10 to 20 ° C., although it depends on the thickness of the film sheet and the size of the hole to be opened.
[0023]
Although the film sheet can be perforated batchwise, it is efficient to perform it continuously. Moreover, the shape of a hole can take various shapes, such as a tetragon | quadrangle, a triangle, a polygon, a circle | round | yen, and an ellipse. In general, a circle is convenient.
[0024]
Next, the perforated oxygen-permeable film sheet is laminated and laminated with a non-perforated polyethylene film sheet.
[0025]
On the other hand, a film sheet obtained by laminating a film sheet having a small oxygen permeability without a small hole and a polyethylene film sheet is formed with a recess into which a food or drink is placed by deep drawing so that the polyethylene layer comes inside. Under the present circumstances, the film layer of the same quality as the polyethylene film sheet which forms the upper part of a container is used for the polyethylene layer of the film sheet which forms a bottom part in a container. If the polyethylene film sheet is of the same quality, the adhesive strength when the bottom and the top are bonded to each other is large.
[0026]
A food or drink is put into the recess thus formed. A film sheet obtained by laminating a polyethylene film sheet on the above-described film sheet having a small oxygen permeability and having a small hole is put on the film sheet and bonded by heat fusion. At this time, the laminated film sheet is arranged such that a small oxygen-permeable film sheet layer having small holes comes up and a polyethylene film sheet layer comes down. Laminate sheets are arranged so that the bottom of the container for cooking food and drink is provided with a polyethylene layer on the inside and a film sheet layer with low oxygen permeability on the outside.
[0027]
When putting food or drink into the bottom of the container and mounting the upper part of the container, the container is evacuated or purged with nitrogen and then adhered to each other. That is, the upper surface of the cooking container in which food or drink is placed and vacuum or nitrogen-substituted is laminated with a film sheet having low oxygen permeability. Further, the lamination of the film sheet having a low oxygen permeability may be performed after the food or drink is put, or the film sheet having a low oxygen permeability is provided on the surface of the film sheet having a small oxygen permeability provided with small holes in advance. May be laminated.
[0028]
Furthermore, instead of laminating a film sheet with low oxygen permeability on the upper surface of the food and drink cooking container, a small piece of film sheet with low oxygen permeability is attached to cover the small holes of the film sheet layer with low oxygen permeability. You may wear it. The film sheet piece having a small oxygen permeability may be attached in advance to a film sheet layer having a small hole and a small oxygen permeability, or may be attached after a food or drink is added.
[0029]
Although the tray-like container has been described above, of course, a bag-like container can also be used. That is, at least two small holes are made in a film sheet having low oxygen permeability, and a polyethylene film sheet is laminated thereon. When the laminated film sheet is folded in two so that the small holes are only on one side and the polyethylene layer is on the inside, and the two are fused, a bag-like container is obtained. A food or drink package is obtained by inserting food or drink from the remaining opening and closing the opening. Laminate a polyamide film sheet, a saponified film sheet of ethylene / vinyl acetate copolymer or a polyvinylidene chloride film sheet on a small-perforated film sheet layer having low oxygen permeability, or small pieces of these film sheets. Cover only the holes.
[0030]
A food and drink package is obtained by enclosing a food and drink in the food and beverage preparation container. Since this food / beverage package package uses a film sheet or polyvinylidene chloride film sheet made of a saponified product of polyamide, ethylene / vinyl acetate copolymer whose outer surface has a low oxygen permeability, oxygen is contained in the food / beverage package. It is hard to permeate, and has the effect of delaying corrosion of food and drink in the package and prolonging it. At the same time, a tasty cooked product can be obtained easily and easily in a microwave oven or the like. Of course, when cooking in a microwave oven or the like, the film sheet with small oxygen permeability on the upper surface of the food or beverage package or a small piece thereof is removed in advance.
[0031]
The food / beverage product package of the present invention usually has a feature that the temperature in the package reaches about 105 to 120 ° C. and the hole is cleaved to release excess pressure. During processing in the microwave oven, pressure is still generated in the package, so the small holes in the film sheet layer with low oxygen permeability are cleaved, but the excess pressure is released and the package is always in the package. A pressure higher than the pressure is maintained. As a result, when the food / beverage product package of the present invention is processed in a microwave oven or the like, the food / beverage product can be cooked at a temperature and pressure suitable for the food / beverage product, and an effect that a flavorful cooked product is obtained is exhibited.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to embodiments. FIG. 1 is an example of a tray-shaped food and drink package. The upper lid 2 is composed of a three-layer sheet in which an upper layer 9 is a polyamide film sheet, an intermediate layer 10 is a polyamide film sheet provided with small holes 11 and 12, and a lower layer 4 is a polyethylene film sheet. The bottom 3 is a two-layer sheet in which the inner side 5 is a polyethylene film sheet and the outer side 6 is a polyamide film sheet. The polyethylene film sheet forming the sheet bottom is the same as the polyethylene film sheet forming the top. The same quality means that the polyethylene used as the raw material for the film sheet is the same quality. By making the polyethylene film sheets the same quality, it is possible to simply and strongly bond each other simply by fusing the top and bottom. Instead of the polyamide film sheet of the upper layer 9, an ethylene / vinyl acetate copolymer saponified film sheet or a polyvinylidene chloride film sheet may be used.
[0033]
Small holes 11 and 12 are formed in an intermediate layer 10 made of an upper polyamide film sheet. The diameter of each hole is 8 mm. In the bottom portion 3, the food and drink 7 and the seasoning 8 are put into a food and drink package. When cooking the food / beverage product package with a microwave oven or the like, the upper layer 9 at the top is removed. A handle 13 is provided so that the upper layer 9 can be easily removed. Instead of the polyamide film sheet, an ethylene / vinyl acetate copolymer saponified film sheet or a polyvinylidene chloride film sheet may be used for the upper intermediate layer or the outside of the bottom part.
[0034]
FIG. 2 is an example of a bag-shaped food and drink package. The upper portion 22 is composed of a three-layer sheet in which an upper layer 29 is a polyamide film sheet, an intermediate layer 30 is a polyamide film sheet provided with small holes 31 and 32, and a lower layer 24 is a polyethylene film sheet. The bottom 23 is formed of a two-layer sheet in which an inner side 25 is a polyethylene film sheet and an outer side 26 is a polyamide film sheet. The polyethylene film sheet forming the sheet bottom is the same as the polyethylene film sheet forming the top. Instead of the polyamide film sheet of the upper layer 29, a saponified film sheet or a polyvinylidene chloride film sheet of an ethylene / vinyl acetate copolymer may be used.
[0035]
Small holes 31 and 32 are formed in the intermediate layer 30 made of the upper polyamide film sheet. The diameter of each hole is 8 mm. The bottom part 23 is filled with a food and drink 27 and a seasoning 28 to form a food and drink package. When cooking the food / beverage product package with a microwave oven or the like, the upper layer 29 at the top is removed. A handle 33 is provided so that the upper layer 29 can be easily removed. Instead of the polyamide film sheet, an ethylene / vinyl acetate copolymer saponified film sheet or a polyvinylidene chloride film sheet may be used for the upper intermediate layer or the outside of the bottom part.
[0036]
FIG. 3 is an example in which a small hole portion is covered with a small piece of film sheet in a tray-shaped food and drink package. The upper part 42 consists of a double layer sheet in which the upper layer 50 is a polyamide film sheet provided with small holes 51 and 52 and the lower layer 44 is a polyethylene film sheet. The bottom 43 is formed of a two-layer sheet in which the inner side 45 is a polyethylene film sheet and the outer side 46 is a polyamide film sheet. The polyethylene film sheet forming the sheet bottom is the same as the polyethylene film sheet forming the top. The small holes 51 and 52 are covered with a small piece 49 of a polyamide film sheet. Each of the small holes 31 and 32 has a diameter of 8 mm. The bottom portion 43 is filled with a food and drink 47 and a seasoning 48 to form a food and drink package. When the food package is cooked in a microwave oven or the like, the upper small piece 49 is removed. A handle 53 is provided so that the small piece 29 can be easily removed. Also in this embodiment, a saponified film sheet of polyvinyl / ethylene acetate copolymer or a polyvinylidene chloride film sheet can be used in place of the polyamide film sheet.
[0037]
【Example】
In the container of the type shown in FIG. 1, a film sheet obtained by laminating a polyamide film with a thickness of 0.025 mm and a polyethylene film with a thickness of 0.04 mm is used for both the top and bottom, and two holes with a diameter of 8 mm are formed in the upper polyamide layer. I opened it. On the polyamide layer having small holes, a polyamide film sheet having no 0.02 mm thickness was further laminated. In this container, 100 g of raw hamburger consisting of 80 g of beef, 14 g of onion, 5 g of raw bread crumbs, and 1 g of seasoning was substituted with nitrogen, and then the upper part and the bottom part were adhered and sealed.
[0038]
A plurality of food and drink packages containing the raw hamburger were prepared, and on the other hand, a plurality of raw hamburger sealed in a container in which the polyamide film sheet was not laminated in the small hole portion was prepared. These food and beverage packages were left in a room at around 20 ° C., the packages were opened at regular intervals, and the decaying state of raw hamburgers was observed. Table 1 shows the results of the observation of corruption.
[0039]
[Table 1]

[0040]
The food and beverage package in which the small hole part was laminated with the polyamide layer started to show signs of change after 7 days, but could be stored for about 10 days, but it was left without covering the small hole part. In the food and beverage package, a change was observed after 3 days, and it became difficult to eat after 5 days. Thus, the effect on storage of the present invention was recognized.
[0041]
When the raw hamburger was sealed, the upper polyamide layer was removed, the food and drink package was placed in a microwave oven with a high frequency output of 500 W, a timer was set at 4 minutes 30 seconds, and the switch was turned on. The moisture contained in the hamburger itself gradually began to evaporate by heating from the time when 1 minute to 1 minute and 20 seconds passed, and the water vapor gradually diffused into the package, and the package began to expand. Further, when about 1 minute and 30 seconds passed, the pressure inside the package rose to about 1.15 atm and the temperature to about 115 ° C., and the package expanded and became a pan. Soon, one of the small holes where the tension acts most on the upper surface side of the package was cleaved. The excess pressure inside the gap was released to the outside, and the inside of the package was further heated for 1 minute 50 seconds to 1 minute 40 seconds while maintaining the pressure at about 1.15 atm. As a result, despite the use of hamburger meat that is difficult to pass through, the raw hamburger is uniformly heat-treated under high humidity, high temperature and high pressure, resulting in a soft hamburger with moderately squeezed oil. It was.
[0042]
【The invention's effect】
The present invention is a food / beverage product container and a food / beverage product package in which the food / beverage product is enclosed. This food and beverage package can be easily cooked using a microwave oven and the like, and the quality of the cooked product for each package is constant, and a product that is almost inferior to the cooked food is obtained. Furthermore, the food / beverage product package can be stored for a relatively long period of time while preventing the food / beverage product from decaying.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a food and drink package. (A) is a top view, (b) is a side view.
FIG. 2 is a diagram illustrating another example of a food and drink package. (A) is a top view, (b) is a side view.
FIG. 3 is a diagram showing another example of a food and drink package. (A) is a top view, (b) is a side view.
[Explanation of symbols]
1,21,41 Containers for food and beverage cooking 2,22,42 Upper 3,23,43 Bottom 4,24,44 Upper lower 5,25,45 Bottom inner 6,26,46 Bottom outer 7,27,47 8, 28, 48 Seasoning 9, 29, 50 Upper upper layer 10, 30 Upper middle layer 11, 12, 31, 32, 51, 52 Small hole 13, 33, 53 Handle 49 Small piece

Claims (3)

The upper part is a film sheet with a low oxygen permeability in the upper layer, and the intermediate layer is at least 2 A small oxygen-permeable film sheet provided with a small hole and a lower layer comprising a three-layer film sheet in which polyethylene film sheets are laminated, and the bottom part is the same polyethylene film sheet as that constituting the upper lower layer, Layered with a film sheet with low oxygen permeability , And , A container for cooking foods and drinks arranged so that the polyethylene layer is on the inside of the bottom part, and a film sheet having a small oxygen permeability on the upper layer laminated so as to be peelable, for cooking foods and drinks container . The film sheet having low oxygen permeability is at least one selected from the group consisting of a polyamide film sheet, a film sheet made of a saponified product of ethylene and vinyl acetate copolymer, and a polyvinylidene chloride film sheet. The container for cooking foods and drinks according to claim 1 . A food / beverage product package, wherein the food / beverage product is enclosed in the food / beverage product cooking container according to claim 1.

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