JP7009077B2 - Food trays and their manufacturing methods - Google Patents
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Description
本発明は、食品用トレイ及びその製造方法に関し、具体的にはオーブンで使用可能な容器に関する。 The present invention relates to a food tray and a method for producing the same, and specifically to a container that can be used in an oven.
冷凍食品等、予め食材を盛り付けられた、電子レンジ加熱可能な食品の容器としては、プラスチック製が知られている。しかしながら殆どのプラスチック製容器は耐熱性が不十分なため、２２０℃付近で加熱するオーブンでは利用できない。オーブンで利用可能な容器としてアルミニウム等の金属製（例えば特許文献１）が知られているが、金属製の容器ではユーザーが誤って電子レンジにより加熱を行った場合、スパークする虞がある。そこで、誤って電子レンジに入れて加熱しても安全性を確保できるよう、金属を使用しない食品用容器が求められている。 Plastic containers are known as containers for foods that can be heated in a microwave oven and are pre-arranged with foodstuffs such as frozen foods. However, most plastic containers have insufficient heat resistance and cannot be used in ovens that heat at around 220 ° C. Metallic containers such as aluminum (for example, Patent Document 1) are known as containers that can be used in an oven, but if a user accidentally heats a metal container with a microwave oven, there is a risk of sparking. Therefore, there is a demand for a food container that does not use metal so that safety can be ensured even if it is accidentally placed in a microwave oven and heated.
他に２２０℃付近で加熱するオーブンで使用可能な容器として、シリコーン容器が知られている。しかしながら、シリコーン容器は剛性が低いという問題があった。つまり容器が柔らかいため、運搬や持ち運びに不適である。また、高温に加熱された食材を、容器から溢してしまう可能性があった。 In addition, a silicone container is known as a container that can be used in an oven that heats at around 220 ° C. However, the silicone container has a problem of low rigidity. In other words, because the container is soft, it is not suitable for transportation or carrying. In addition, there is a possibility that the food material heated to a high temperature may overflow from the container.
さらにシリコーン以外で、比較的耐熱温度の高い、食品容器に使用可能なプラスチックとして、Ｃ－ＰＥＴ（Crystalline Polyethylene Terephthalate）、ＰＢＴ（Polybutylene Terephthalate）等が知られている。しかしながら、これらも耐熱温度は２２０℃程度であり、オーブン加熱の使用に適しないという問題があった。 Further, other than silicone, C-PET (Crystalline Polyethylene Terephthalate), PBT (Polybutylene Terephthalate) and the like are known as plastics having a relatively high heat resistant temperature and can be used for food containers. However, these also have a heat resistant temperature of about 220 ° C., and have a problem that they are not suitable for use in oven heating.
本発明は、従来のこのような背景に鑑みてなされたものであり、その目的の一は、オーブンで使用可能な剛性を備えた食品用トレイ及びその製造方法を提供することにある。 The present invention has been made in view of such a conventional background, and one of the objects thereof is to provide a rigid food tray that can be used in an oven and a method for producing the same.
本発明の第１の側面に係る食品用トレイによれば、食品を予め盛り付けて、オーブンで使用可能な食品用の樹脂製トレイであって、シリコーン樹脂に無機物として炭酸カルシウム、クレー、タルク、硫酸カルシウムの少なくとも何れかを重量比で５０～８０％含有させることができる。これにより、容器の剛性を高め容器の変形を抑えることができる。例えば食材を盛り付けた容器を２５０℃で２５分間オーブンで加熱した際でも容器変形が抑制されているため、持ち運び時に高温の食材を溢す危険性が少なくなる。 According to the food tray according to the first aspect of the present invention, it is a resin tray for food that can be used in an oven by pre-arranging food, and calcium carbonate, clay, talc, and sulfuric acid are used as inorganic substances in a silicone resin. At least one of calcium can be contained in an amount of 50 to 80% by weight. As a result, the rigidity of the container can be increased and the deformation of the container can be suppressed. For example, even when a container containing food is heated in an oven at 250 ° C. for 25 minutes, deformation of the container is suppressed, so that there is less risk of overflowing high-temperature food when carrying.
また、第２の側面に係る食品用トレイによれば、上記構成に加えて、廃棄時に引き裂いて減容化でき、誤って電子レンジで加熱した場合にスパークしない非金属材料製の食品用トレイである。 Further, according to the food tray according to the second aspect, in addition to the above configuration, a food tray made of a non-metal material that can be torn at the time of disposal to reduce the volume and does not spark when accidentally heated in a microwave oven. be.
さらに、第３の側面に係る食品用トレイによれば、上記何れかの構成に加えて、シリコーン樹脂に前記無機物として炭酸カルシウムを重量比で５０～７０％含有させている。
さらにまた、第４の側面に係る食品用トレイによれば、上記何れかの構成に加えて、前記無機物を、多孔質状、針状、板状、立方体状の何れかとすることができる。上記構成により、シリコーン樹脂との混合性を高め、また得られる食品用トレイの剛性を更に高めることができる。
Further, according to the food tray according to the third aspect, in addition to any of the above configurations, the silicone resin contains 50 to 70% by weight of calcium carbonate as the inorganic substance.
Furthermore, according to the food tray according to the fourth aspect, in addition to any of the above configurations, the inorganic substance can be any of a porous shape, a needle shape, a plate shape, and a cube shape. With the above configuration, the mixing property with the silicone resin can be enhanced, and the rigidity of the obtained food tray can be further enhanced.
さらにまた、第５の側面に係る食品用トレイによれば、上記何れかの構成に加えて、前記シリコーン樹脂に、二種以上の無機物を含有させることができる。上記構成により、複数の異なる無機物を添加して更に容器変形を抑制することができる。 Furthermore, according to the food tray according to the fifth aspect, in addition to any of the above configurations, the silicone resin can contain two or more kinds of inorganic substances. With the above configuration, a plurality of different inorganic substances can be added to further suppress the deformation of the container.
さらにまた、第６の側面に係る食品用トレイによれば、上記何れかの構成に加えて、前記二種以上の無機物が、炭酸カルシウムと、タルク又は硫酸カルシウムを含むことができる。これにより更に剛性を向上させると共に、容器変形を抑えることができる。 Furthermore, according to the food tray according to the sixth aspect, in addition to any of the above configurations, the two or more kinds of inorganic substances can contain calcium carbonate and talc or calcium sulfate. As a result, the rigidity can be further improved and the deformation of the container can be suppressed.
さらにまた、第７の側面に係る食品用トレイによれば、上記何れかの構成に加えて、前記無機物の平均粒子径を１５μｍ～２００μｍとすることができる。 Furthermore, according to the food tray according to the seventh aspect, in addition to any of the above configurations, the average particle size of the inorganic substance can be set to 15 μm to 200 μm.
さらにまた、第８の側面に係る食品用トレイによれば、上記何れかの構成に加えて、前記食品用トレイを構成するシリコーン樹脂製シートを、質量４０ｇ、大きさ１５０ｍｍ×１００ｍｍとして、その長辺の端部５０ｍｍを把持した状態で、１００ｍｍ×１００ｍｍの領域の端縁が、自重で水平面から垂れ下がる量を２０ｍｍ以内とすることができる。これにより、剛性を高めて型崩れの生じ難い食品用トレイを得ることが可能となる。 Furthermore, according to the food tray according to the eighth aspect, in addition to any of the above configurations, the silicone resin sheet constituting the food tray has a mass of 40 g and a size of 150 mm × 100 mm, and has a length thereof. With the edge of the side 50 mm gripped, the amount of the edge of the region of 100 mm × 100 mm hanging from the horizontal plane by its own weight can be set to 20 mm or less. This makes it possible to obtain a food tray that has increased rigidity and is less likely to lose its shape.
さらにまた、第９の側面に係る食品用トレイの製造方法によれば、食品を予め盛り付けて、オーブンで使用可能な食品用トレイの製造方法であって、母材となるシリコーン樹脂に、多孔質状、針状、板状、立方体状の炭酸カルシウム、クレー、タルク、硫酸カルシウムの少なくとも何れかを重量比で５０～８０％添加して、混合する工程と、混合物を成形型に注入して射出成形し、硬化させる工程とを含むことができる。これにより、シリコーン樹脂を使用しつつ、剛性を高め、さらに容器変形を抑えることができる。 Furthermore, according to the method for manufacturing a food tray according to the ninth aspect, it is a method for manufacturing a food tray in which food is pre-loaded and can be used in an oven, and the silicone resin as a base material is porous. A step of adding 50 to 80% by weight of at least one of calcium carbonate, clay, talc, and calcium sulfate in the form of a needle, a plate, a plate, or a cube, and mixing, and injecting the mixture into a molding die and injecting the mixture. It can include a step of molding and curing. This makes it possible to increase the rigidity and further suppress the deformation of the container while using the silicone resin.
以下、本発明の実施の形態を説明する。ただし、以下に示す実施の形態は、本発明の技術思想を具体化するための食品用トレイ及びその製造方法を例示するものであって、本発明は食品用トレイ及びその製造方法を以下のものに特定しない。また、本明細書は特許請求の範囲に示される部材を、実施の形態の部材に特定するものでは決してない。特に実施の形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は特定的な記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。
（実施形態１）
Hereinafter, embodiments of the present invention will be described. However, the embodiments shown below exemplify a food tray and a method for producing the same for embodying the technical idea of the present invention, and the present invention describes the food tray and the method for producing the same as follows. Not specified in. Further, the present specification does not specify the members shown in the claims as the members of the embodiment. In particular, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description, and are merely explanatory examples. It's just that.
(Embodiment 1)
発明の実施形態１に係る食品用トレイは、オーブンで使用可能な耐熱性と剛性を備え、容器変形を抑制できる。ただし、金属製とすると、ユーザーが誤って電子レンジで加熱した場合、スパークする虞があるため、金属材料は使用しない。一般に非金属で耐熱性の高い材料として、シリコーン樹脂が知られているが、シリコーン樹脂製の食品用トレイは、一般にシリコーンゴムであって高い耐熱性を有するものの剛性が低く、柔らかいため電子レンジ加熱やオーブン加熱には使用し難い。 The food tray according to the first embodiment of the present invention has heat resistance and rigidity that can be used in an oven, and can suppress deformation of the container. However, if it is made of metal, it may spark if the user accidentally heats it in the microwave, so no metal material is used. Silicone resin is generally known as a non-metal material with high heat resistance. However, a food tray made of silicone resin is generally silicone rubber, which has high heat resistance, but has low rigidity and is soft, so that it can be heated in an oven. It is difficult to use for heating or oven heating.
そこで本実施形態に係る食品用トレイにおいては、母材となるシリコーン樹脂に、無機物を重量比で１～８０％添加している。無機物を添加することで、容器の剛性を高め、変形を抑えることができる。ここでは、２５０℃で加熱しても容器変形を抑制させ、持ち運び時に高温の食材を溢す危険性が少ない樹脂製容器製造に成功した。 Therefore, in the food tray according to the present embodiment, 1 to 80% of an inorganic substance is added to the silicone resin as a base material by weight. By adding an inorganic substance, the rigidity of the container can be increased and deformation can be suppressed. Here, we succeeded in producing a resin container that suppresses deformation of the container even when heated at 250 ° C. and has less risk of overflowing high-temperature foodstuffs when it is carried.
加えて、シリコーン樹脂に無機物を添加することにより、シリコーン樹脂単体と比較し破断性が向上した。これにより廃棄時に容器を手などで引き裂いて減容化できるようになる。あるいは、食品用トレイの一部にノッチやミシン目を付加したり、薄肉部を設けるなどして、さらに易破断性を高めても良い。 In addition, by adding an inorganic substance to the silicone resin, the breakability was improved as compared with the silicone resin alone. This makes it possible to tear the container by hand at the time of disposal to reduce the volume. Alternatively, notches and perforations may be added to a part of the food tray , or a thin-walled portion may be provided to further improve the fragility.
母材として用いる樹脂は、シリコーン、Ｃ－ＰＥＴ（Crystalline Polyethylene Terephthalate）、ＰＢＴ（Polybutylene Terephthalate)等が挙げられる。この中でもシリコーン樹脂が好ましい。 Examples of the resin used as the base material include silicone, C-PET (Crystalline Polyethylene Terephthalate), PBT (Polybutylene Terephthalate) and the like. Of these, silicone resin is preferable.
母材に添加する無機物は、炭酸カルシウム、クレー、タルク、硫酸カルシウム、酸化チタン、鉄、フェライト、シリカ、ゼオライトの少なくとも何れかを使用することが好ましい。タルクは天然の含水ケイ酸マグネシウム（Ｍｇ3（Ｓｉ4Ｏ10）（ＯＨ）2）で、滑石等とも呼ばれる。硫酸カルシウムは、安価に入手可能な石膏（ＣａＳＯ4・２Ｈ2Ｏ）が好適に利用できる。 As the inorganic substance added to the base material, it is preferable to use at least one of calcium carbonate, clay, talc, calcium sulfate, titanium oxide, iron, ferrite, silica, and zeolite. Talc is a natural hydrous magnesium silicate (Mg 3 (Si 4 O 10 ) (OH) 2 ) and is also called talc. As calcium sulfate, gypsum (CaSO 4.2H 2 O), which is inexpensively available, can be preferably used.
また無機物は、一種類のみをシリコーン樹脂に添加する他、異なる二種以上の無機物を添加させることもできる。これにより、機能性を向上できる。好ましくは、二種以上の無機物の一方を炭酸カルシウムとする。これにより、剛性を向上させ、容器変形を抑えることができる。またその含有比率は、炭酸カルシウムを２０％以上、シリコーン樹脂に添加することが好ましい。これにより、炭酸カルシウムの添加量を相対的に多くしてシリコーン樹脂の使用量を低減させ、コストダウンと環境負荷の低減が図れる。 Further, as for the inorganic substance, not only one kind is added to the silicone resin, but also two or more different kinds of inorganic substances can be added. This can improve functionality. Preferably, one of two or more kinds of inorganic substances is calcium carbonate. As a result, the rigidity can be improved and the deformation of the container can be suppressed. The content ratio is preferably 20% or more of calcium carbonate added to the silicone resin. As a result, the amount of calcium carbonate added can be relatively increased to reduce the amount of silicone resin used, resulting in cost reduction and reduction of environmental load.
これらの無機物は、微粒子の粒状や粉体状とする。また粒状又は粉体状の無機物は、多孔質状、針状、板状、立方体状等とすることが好ましい。これにより、シリコーン樹脂との混合性を高め、また得られる食品用トレイの剛性を高めることができる。 These inorganic substances are in the form of fine particles or powder. Further, the granular or powdery inorganic substance is preferably porous, needle-like, plate-like, cubic-like or the like. As a result, the mixing property with the silicone resin can be improved, and the rigidity of the obtained food tray can be increased.
また無機物の平均粒子径は、０．０３μｍ～２００μｍが好ましい。より好ましくは１５μｍよりも大きくして、１５μｍ～２００μｍである。さらに好ましくは１５μｍ～１００μｍ、最も好ましくは１５μｍ～５０μｍである。 The average particle size of the inorganic substance is preferably 0.03 μm to 200 μm. More preferably, it is larger than 15 μm and is 15 μm to 200 μm. It is more preferably 15 μm to 100 μm, and most preferably 15 μm to 50 μm.
また無機物のＢＥＴ比表面積は、好ましくは２～８０ｍ2／ｇであり、より好ましくは８～６０ｍ2／ｇである。無機物に含有される水分は５％以下が好ましい。 The BET specific surface area of the inorganic substance is preferably 2 to 80 m 2 / g, and more preferably 8 to 60 m 2 / g. The water content of the inorganic substance is preferably 5% or less.
さらに必要に応じて、表面処理材や分散材、粘度調整材、酸化防止材、紫外線吸収材等を添加しても良い。 Further, if necessary, a surface treatment material, a dispersant material, a viscosity adjusting material, an antioxidant material, an ultraviolet absorbing material and the like may be added.
さらに食品用トレイを構成する材料となる無機物含有シリコーン樹脂製シートを、質量４０ｇ、大きさ１５０ｍｍ×１００ｍｍに切り出した状態で、その長辺の端部５０ｍｍを把持したとき、１００ｍｍ×１００ｍｍの領域の端縁が自重で水平面から垂れ下がる量を、２０ｍｍ以内とすることができる。このようにして、食品用トレイの剛性を高めて、運搬や携帯、使用に際して型崩れの生じ難い、使い易い容器とできる。例えば高温に加熱したスープを入れる食品用トレイとして用いる場合、剛性の低いシリコーン樹脂製容器では手で持った状態で変形してスープがこぼれたり、火傷することが考えられるところ、剛性を高めた食品用トレイとすることで、このような問題を解消できる。また食品用トレイの運搬時、例えば製品を店舗まで輸送トラック等で運ぶ運搬時の型崩れ、あるいや利用者が購入して持ち帰るまでの間の型崩れも防止できる。
（実施例）
Further, when a sheet made of an inorganic substance-containing silicone resin, which is a material constituting a food tray , is cut out to a mass of 40 g and a size of 150 mm × 100 mm, and the end portion of the long side thereof is 50 mm, a region of 100 mm × 100 mm is formed. The amount of the edge hanging from the horizontal plane due to its own weight can be within 20 mm. In this way, the rigidity of the food tray can be increased to make a container that is easy to use and does not easily lose its shape during transportation, carrying, and use. For example, when used as a food tray for storing soup heated to a high temperature, a low-rigidity silicone resin container may be deformed while being held by hand and the soup may spill or be burned. By using a tray for use, such a problem can be solved. In addition, it is possible to prevent the food tray from losing its shape when it is transported, for example, when the product is transported to a store by a transportation truck or the like, or until the user purchases it and takes it home.
(Example)
ここで、実施例１～１５として添加する無機物の種類を変化させた食品用トレイを作成し、これに冷凍グラタン及び常温のグラタンを入れて加熱試験を行った結果を、表１に示す。表１は実施例１～１５及び比較例の無機物のパラメータ、樹脂と無機物の混合性、食品の残留性や容器の変形性を、それぞれ示している。ここでは、母材としてシリコーン樹脂を選択し、東レ・ダウコーニング株式会社製Ｍｏｌｄａｂｌｅ Ｓｉｌｉｃｏｎｅ ＭＳ－１００２を用いた。これは二液混合の付加反応で、二液の混合比率は１：１とした。また粘度は２６２５０ｃＰ、硬化後の引張強度は１１．２ＭＰａであった。また添加する無機物との配合比は、シリコーン樹脂：無機物＝４９．９：５０．１とした。なお比較のため、無機物を添加しないシリコーン樹脂のみの食品用トレイを、比較例として作成した。 Here, Table 1 shows the results of heating tests in which frozen gratin and gratin at room temperature were prepared by preparing food trays in which the types of inorganic substances to be added were changed as Examples 1 to 15. Table 1 shows the parameters of the inorganic substances of Examples 1 to 15 and Comparative Examples, the mixing property of the resin and the inorganic substance, the residual property of the food, and the deformability of the container, respectively. Here, a silicone resin was selected as the base material, and Moldable Silicone MS-1002 manufactured by Toray Dow Corning Co., Ltd. was used. This was an addition reaction of two-liquid mixing, and the mixing ratio of the two liquids was 1: 1. The viscosity was 26250 cP, and the tensile strength after curing was 11.2 MPa. The compounding ratio with the added inorganic substance was set to silicone resin: inorganic substance = 49.9: 50.1. For comparison, a food tray containing only silicone resin without adding inorganic substances was prepared as a comparative example.
また各実施例は、無機物の微粒子とシリコーン樹脂が計４０ｇとなるように配合して、良く混合した。そして得られた混合液を、表面がフッ素加工された容器に注入し、約１７０℃で２時間で硬化させて、容器状に成形した。このようにして得られた食品用トレイに、市販されている株式会社明治製「明治えびグラタン３個入」２００ｇを載せて、オーブンに入れ、２５０℃で２５分加熱を行った。そして加熱後にオーブンから取り出し、各実施例及び比較例の食品の残留性、容器変形を確認した。また食品の残留性については、容器にグラタンがどの程度残っているか、残量を確認した。表１において、表面積はＢＥＴ比表面積であり、実測値を記すと共に、括弧内に製造メーカーが提示する規格値を示している。 Further, in each example, the fine particles of the inorganic substance and the silicone resin were mixed so as to be 40 g in total, and mixed well. Then, the obtained mixed liquid was poured into a container whose surface was treated with fluorine, and cured at about 170 ° C. for 2 hours to form a container. On the food tray thus obtained, 200 g of commercially available "Meiji shrimp gratin 3 pieces" manufactured by Meiji Co., Ltd. was placed, placed in an oven, and heated at 250 ° C. for 25 minutes. Then, after heating, the food was taken out from the oven, and the persistence of the foods of each example and the comparative example and the deformation of the container were confirmed. Regarding the residualness of food, we checked how much gratin remained in the container. In Table 1, the surface area is the BET specific surface area, and the measured values are shown and the standard values presented by the manufacturer are shown in parentheses.
さらに剛性を示す指標として、各実施例の垂れ下がりを測定した。ここでは、各実施例に係るシートを質量４０ｇ、大きさ１５０ｍｍ×１００ｍｍとし、その長辺の端部５０ｍｍを把持して、１００ｍｍ×１００ｍｍの領域の端縁が、自重で水平面から垂れ下がった量をノギスで測定した。なおシートの厚さについては、添加される無機物によって変動し、１ｍｍ～３ｍｍの範囲となった。 Further, as an index showing the rigidity, the sagging of each example was measured. Here, the sheet according to each embodiment has a mass of 40 g and a size of 150 mm × 100 mm, and the end portion of the long side thereof is gripped by 50 mm so that the edge of the region of 100 mm × 100 mm hangs down from the horizontal plane by its own weight. Measured with a caliper. The thickness of the sheet varied depending on the added inorganic substances and was in the range of 1 mm to 3 mm.
以上の結果から、いずれの実施例においても熱による容器の変形が外観上見られず、冷凍グラタン、常温保存グラタンの何れにおいてもオーブンで２５０℃で２５分間加熱しても容器変形の無いことが確認された。また垂れ下がりも比較例と比べて少なく、剛性が向上されていることが確認された。 From the above results, no deformation of the container due to heat was observed in any of the examples, and there was no deformation of the container in both the frozen gratin and the gratin stored at room temperature even when heated in an oven at 250 ° C. for 25 minutes. confirmed. In addition, the sagging was less than that of the comparative example, and it was confirmed that the rigidity was improved.
さらに無機物として炭酸カルシウムを用いた実施例１～３、７では、食品の残留性すなわち容器に付着しているグラタンの残量が少なく、また剛性も比較例に比べて高くなり、いずれも良好な結果を示した。ただし多孔質状の炭酸カルシウムでは、シリコーン樹脂との混合性が低下した。 Further, in Examples 1 to 3 and 7 in which calcium carbonate was used as an inorganic substance, the residual amount of gratin adhering to the container was small, and the rigidity was higher than that of the comparative example, all of which were good. The results are shown. However, in the porous calcium carbonate, the mixing property with the silicone resin was lowered.
なお鉄粉（実施例１３）では、多孔質状であってもシリコーン樹脂との混合は可能であったが、これのみ強度が比較例よりも低下した。
（実施例１６～１９）
The iron powder (Example 13) could be mixed with the silicone resin even if it was porous, but the strength was lower than that of the comparative example.
(Examples 16 to 19)
次に、無機物の比率を変化させた例を実施例１６～１９として、表２に示す。これらの例において、実施例１６では無機物の比率を多くし、シリコーン樹脂と無機物の比率を３０．０：７０．０とした。一方実施例１７～１９では逆に少なくして９０．０：１０．０とした。 Next, Table 2 shows examples in which the ratio of inorganic substances is changed as Examples 16 to 19. In these examples, in Example 16, the ratio of the inorganic substance was increased, and the ratio of the silicone resin to the inorganic substance was set to 30.0: 70.0. On the other hand, in Examples 17 to 19, it was reduced to 90.0: 10.0.
表２に示すように、無機物の比率を小さくすることでシリコーン樹脂との混合性が改善された。例えば、表２で示すように５０．１％では混合性が悪かった多孔質状の炭酸カルシウムにおいても、実施例１７で示すように、多孔質状であってもシリコーン樹脂との混合が可能な状態に改善された。特に炭酸カルシウムは、混合性が改善された。多孔質状の無機物を添加することで、垂れ下がりが少なく、剛性が向上している。また石膏の例でも、実施例１１では食品の残量が多かったが、石膏比率を実施例１１よりも低くした実施例１９では食品の残留性が改善された。
（実施例２０～２２）
As shown in Table 2, the mixing property with the silicone resin was improved by reducing the ratio of the inorganic substances. For example, as shown in Table 2, the porous calcium carbonate having poor mixing property at 50.1% can be mixed with the silicone resin even if it is porous as shown in Example 17. The condition has improved. In particular, calcium carbonate has improved mixing properties. By adding a porous inorganic substance, there is less sagging and rigidity is improved. Also in the case of gypsum, the remaining amount of food was large in Example 11, but the residual food was improved in Example 19 in which the gypsum ratio was lower than that of Example 11.
(Examples 20 to 22)
以上の例ではシリコーン樹脂に対して一種類の無機物を添加した例を説明した。ただ本発明では、複数種類の無機物を添加することもできる。このような例を実施例２０～２２として表３に示す。この例においては、第一無機物Ａに加えて第二無機物Ｂを添加し、２種類の無機物の比率を変更している。第一無機物Ａとしては炭酸カルシウムを用いた。まず実施例２０～２１では、シリコーン樹脂３９．９％に対して第一無機物Ａを４０．０％、無機物Ｂを２０．１％添加している。第二無機物Ｂとしてはタルクと石膏を用いた。また実施例２２ではシリコーン樹脂を４４．９％、無機物Ａを４５．０％、無機物Ｂ（タルク）を１０．１％としている。 In the above example, an example in which one kind of inorganic substance is added to the silicone resin has been described. However, in the present invention, a plurality of types of inorganic substances can be added. Such examples are shown in Table 3 as Examples 20 to 22. In this example, the second inorganic substance B is added in addition to the first inorganic substance A to change the ratio of the two kinds of inorganic substances. Calcium carbonate was used as the primary inorganic substance A. First, in Examples 20 to 21, 40.0% of the first inorganic substance A and 20.1% of the inorganic substance B are added to 39.9% of the silicone resin. Talc and gypsum were used as the second inorganic substance B. Further, in Example 22, the silicone resin is 44.9%, the inorganic substance A is 45.0%, and the inorganic substance B (talc) is 10.1%.
特に炭酸カルシウムとタルク（実施例２２）の組み合わせでは、タルクの量を抑えることで混合性が良くなり、容器に付着しているグラタンの残量が少なく、容器変形も見られなかった。シートの垂れ下がりも少なかったため、食品用トレイの厚さを薄くできることに繋がり、樹脂等の材料の低減によるコスト削減や軽量化、環境負荷の軽減などの点でも有利となる。さらにシリコーン樹脂のままでは破断がし辛かったところ、無機物の添加により引き裂き易くなって減容化し易くできる利点も得られる。 In particular, in the combination of calcium carbonate and talc (Example 22), the mixing property was improved by suppressing the amount of talc, the remaining amount of gratin adhering to the container was small, and no deformation of the container was observed. Since the sheet hangs down less, the thickness of the food tray can be reduced, which is advantageous in terms of cost reduction, weight reduction, and reduction of environmental load by reducing materials such as resin. Further, although it is difficult to break the silicone resin as it is, the addition of an inorganic substance makes it easier to tear and reduce the volume.
なお、以上で得られた実施例の内、実施例２０～２２の食品用トレイについては、炭酸カルシウムを使用しているものの、酢酸に晒されても炭酸カルシウムの溶出量が抑制されるので、食品、添加物等の規格基準として知られる厚生省告示第３７０号で定める酢酸に晒した場合の溶出試験にも対応でき、食品用途に適法に用いることが可能となる。その理由は、炭酸カルシウムの分散性が向上しているため、食品用トレイの表面に露出する炭酸カルシウムが低減される結果、酢酸に晒されても炭酸カルシウムの溶出量が抑制されているものと思われる。 Of the examples obtained above, although calcium carbonate is used in the food trays of Examples 20 to 22, the amount of calcium carbonate eluted is suppressed even when exposed to acetic acid. It can also be used for dissolution tests when exposed to acetic acid specified in Notification No. 370 of the Ministry of Health and Welfare, which is known as a standard for foods and additives, and can be legally used for food applications. The reason is that the dispersibility of calcium carbonate is improved, so that the amount of calcium carbonate exposed on the surface of the food tray is reduced, and as a result, the amount of calcium carbonate elution is suppressed even when exposed to acetic acid. Seem.
以上のように本実施形態によれば、シリコーン樹脂を使用しつつ、剛性を高め、さらに容器変形を抑えることができる。 As described above, according to the present embodiment, it is possible to increase the rigidity and further suppress the deformation of the container while using the silicone resin.
本発明の食品用トレイ及びその製造方法によれば、食品を予め盛り付けたオーブン加熱使用の冷凍食品や冷蔵食品用のトレイとして好適に利用できる。 According to the food tray of the present invention and the method for producing the same, it can be suitably used as a tray for frozen foods and refrigerated foods in which foods are pre-arranged and used by heating in an oven.
Claims (9)
シリコーン樹脂に無機物として炭酸カルシウム、クレー、タルク、硫酸カルシウムの少なくとも何れかを重量比で５０～８０％含有させてなる食品用トレイ。 A resin tray for food that can be pre-arranged with food and used in the oven.
A food tray containing at least 50 to 80% by weight of calcium carbonate, clay, talc, or calcium sulfate as an inorganic substance in a silicone resin.
廃棄時に引き裂いて減容化でき、
誤って電子レンジで加熱した場合にスパークしない非金属材料製の食品用トレイ。 The food tray according to claim 1.
Can be torn and reduced in volume at the time of disposal,
Food trays made of non-metallic materials that do not spark if accidentally heated in the microwave.
シリコーン樹脂に前記無機物として炭酸カルシウムを重量比で５０～７０％含有させてなる食品用トレイ。 The food tray according to claim 1 or 2.
A food tray containing 50 to 70% by weight of calcium carbonate as the inorganic substance in a silicone resin.
前記無機物が、多孔質状、針状、板状、立方体状の何れかである食品用トレイ。 The food tray according to any one of claims 1 to 3.
A food tray in which the inorganic substance is porous, needle-shaped, plate-shaped, or cubic-shaped.
前記シリコーン樹脂に、二種以上の無機物を含有させてなる食品用トレイ。 The food tray according to any one of claims 1 to 2 and 4.
A food tray containing two or more kinds of inorganic substances in the silicone resin.
前記二種以上の無機物が、炭酸カルシウムと、タルク又は硫酸カルシウムを含む食品用トレイ。 The food tray according to claim 5.
A food tray containing calcium carbonate and talc or calcium sulfate in the two or more kinds of inorganic substances.
前記無機物が、平均粒子径を１５μｍ～２００μｍとしてなる食品用トレイ。 The food tray according to any one of claims 1 to 6.
A food tray in which the inorganic substance has an average particle size of 15 μm to 200 μm.
前記食品用トレイを構成するシリコーン樹脂製シートを、質量４０ｇ、大きさ１５０ｍｍ×１００ｍｍとして、その長辺の端部５０ｍｍを把持した状態で、１００ｍｍ×１００ｍｍの領域の端縁が、自重で水平面から垂れ下がる量を２０ｍｍ以内としてなる食品用トレイ。 The food tray according to any one of claims 1 to 7.
The silicone resin sheet constituting the food tray has a mass of 40 g and a size of 150 mm × 100 mm, and the edge of the region of 100 mm × 100 mm is from the horizontal plane by its own weight in a state where the end portion of the long side thereof is gripped by 50 mm. A food tray with a hanging amount of 20 mm or less.
母材となるシリコーン樹脂に、多孔質状、針状、板状、立方体状の炭酸カルシウム、クレー、タルク、硫酸カルシウムの少なくとも何れかを重量比で５０～８０％添加して、混合する工程と、
混合物を成形型に注入して射出成形し、硬化させる工程と、
を含む食品用トレイの製造方法。 A method of manufacturing food trays that can be used in an oven by pre-arranging food.
A step of adding at least 50 to 80% by weight of any one of porous, needle-shaped, plate-shaped, and cubic-shaped calcium carbonate, clay, talc, and calcium sulfate to the base material silicone resin and mixing them. ,
The process of injecting the mixture into a mold, injection molding and curing,
How to make food trays, including.
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| JP2004242591A (en) | 2003-02-14 | 2004-09-02 | Shin Etsu Chem Co Ltd | Bread-baking mold |
| JP2006144006A (en) | 2004-11-04 | 2006-06-08 | Wacker Chemie Ag | Heat-conductive and microwave-active mold for food |
| JP2013103438A (en) | 2011-11-15 | 2013-05-30 | Denki Kagaku Kogyo Kk | Sheet and container using the same |
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| JP2006144006A (en) | 2004-11-04 | 2006-06-08 | Wacker Chemie Ag | Heat-conductive and microwave-active mold for food |
| JP2013103438A (en) | 2011-11-15 | 2013-05-30 | Denki Kagaku Kogyo Kk | Sheet and container using the same |
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