JP6195721B2 - Food container - Google Patents
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- JP6195721B2 JP6195721B2 JP2013070558A JP2013070558A JP6195721B2 JP 6195721 B2 JP6195721 B2 JP 6195721B2 JP 2013070558 A JP2013070558 A JP 2013070558A JP 2013070558 A JP2013070558 A JP 2013070558A JP 6195721 B2 JP6195721 B2 JP 6195721B2
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Description
この発明は、食品容器に関し、より詳しくは、弁当のおかず入れや食品の鮮度保持に用いられる食品容器に関する。 The present invention relates to a food container, and more particularly to a food container used for a side dish of a lunch box or maintaining the freshness of food.
従来、弁当のおかず入れ等に用いられる食品容器は公知であり、例えば特許文献１には、複合層よりなるシート材料により構成される食品収容容器において、複合層は、吸液性を有する吸液性層と、非吸液性を有し、吸液性層の容器内面側の全面に形成され、少なくとも１つの開口を有する第１非吸液性層と、非吸液性を有し、吸液性層の容器外面側の全面に形成された第２非吸液性層とを備える食品収容容器が開示されている。 Conventionally, a food container used for a side dish of a lunch box is known. For example, Patent Document 1 discloses a food container that is made of a sheet material made of a composite layer. The composite layer has a liquid absorption property. A non-liquid-absorbing layer, a first non-liquid-absorbing layer formed on the entire inner surface of the container of the liquid-absorbing layer and having at least one opening; A food container comprising a second non-liquid-absorbing layer formed on the entire surface of the liquid layer on the outer surface side of the container is disclosed.
特許文献１に記載された食品収容容器によれば、食品から滲み出た液体は、食品収容容器の内面に設けられた開口を通して吸液性層に吸液される。特許文献１の実施形態には、吸液性層として紙を用いることが記載されている。しかし、紙では食品から滲み出た液体の吸収能力が不足し、例えば弁当のおかず入れに用いたとき、おかずから滲み出た液体が容器の外にこぼれ出して周囲のおかずに混入することがあるため、更なる改良が求められている。 According to the food container described in Patent Document 1, the liquid that has oozed out of the food is sucked into the liquid-absorbing layer through an opening provided on the inner surface of the food container. In the embodiment of Patent Document 1, it is described that paper is used as the liquid absorbing layer. However, paper does not have sufficient ability to absorb liquid that has oozed out of food. For example, when it is used as a side dish in a lunch box, the liquid oozed out from the side spills out of the container and may be mixed into the side dishes. Therefore, further improvements are required.
本発明は従来の食品容器の改良を目的とし、食品から滲み出た煮汁や食用油等の液体（以下、滲出液という）の吸収保持能力が高い食品容器を提供することを課題とする。 An object of the present invention is to improve a conventional food container and to provide a food container having a high ability to absorb and retain liquids (hereinafter referred to as exudate) such as boiled juice and edible oil that have exuded from food.
本発明は、前記課題を解決するために、内面及び外面と、底面と、前記底面の周縁から起立する周壁面と、透液性の内面層と、非透液性の外面層と、前記内面層と前記外面層との間に配置される吸液性の吸液層とを有する食品容器に関する。 In order to solve the above problems, the present invention provides an inner surface and an outer surface, a bottom surface, a peripheral wall surface standing from a peripheral edge of the bottom surface, a liquid-permeable inner surface layer, a non-liquid-permeable outer surface layer, and the inner surface. The present invention relates to a food container having a liquid absorbing layer disposed between a layer and the outer surface layer.
本発明に係る食品容器は、一つの実施形態では、前記内外面層及び前記吸液層を形成する複合シートと、前記内面において前記底面の前記周縁に沿って環状に延びる第１圧縮溝と、前記周壁面において周方向へ互いに間隔を空けて前記第１圧縮溝から前記周壁面の外端縁まで延びる複数条の第２圧縮溝とをさらに有し、前記第１及び第２圧縮溝は、前記内面層と前記吸液層とを前記内面側から前記外面側へ向かって圧縮して形成されており、前記第１及び第２圧縮溝の厚さ寸法は、前記複合シートの厚さ寸法の７０％以下であり、前記底面には、前記内面層を貫通する複数の開孔が形成されており、前記開孔の縦断面形状が前記内面側の表面から前記吸液層に向けてなだらかな曲線であって、前記複合シートは、ドット状又はスパイラル状に塗布された質量５ｇ／ｍ ２ 以下のホットメルト接着剤を介して接合されており、前記底面に滲出した滲出液が前記開孔から前記吸液層に吸収されるとともに、前記第１圧縮溝から前記第２圧縮溝に沿って前記外端縁へ向かって移動することを特徴とする。 In one embodiment, the food container according to the present invention is a composite sheet that forms the inner and outer surface layers and the liquid-absorbing layer, and a first compressed groove that extends annularly along the peripheral edge of the bottom surface on the inner surface, A plurality of second compression grooves extending from the first compression groove to the outer end edge of the peripheral wall surface at intervals in the circumferential direction on the peripheral wall surface, and the first and second compression grooves are: The inner surface layer and the liquid absorbing layer are formed by compressing from the inner surface side toward the outer surface side, and the thickness dimension of the first and second compression grooves is the thickness dimension of the composite sheet. 70% or less, and a plurality of apertures penetrating the inner surface layer are formed on the bottom surface, and the longitudinal cross-sectional shape of the apertures is gentle from the inner surface to the liquid absorbing layer. It is a curve, and the composite sheet has a dot shape or a spiral shape. Through the cloth mass 5 g / m 2 or less of the hot melt adhesive is bonded, with exudate exuded on the bottom is absorbed by the liquid absorbing layer from said aperture, from said first compressed grooves It moves toward the outer edge along the second compressed groove .
本発明の食品容器では、第１及び第２圧搾溝において圧搾された吸液層が毛細管現象を示すことにより、内面層の開孔を通過した滲出液を、第１及び第２圧搾溝を通じて吸液層内において速やかに移動させることができ、更に、第１及び第２圧搾溝が形成されていない部分の吸液層に滲出液を拡散させて保持させることができるので、食品容器の滲出液吸収保持能力が向上する。 In the food container according to the present invention, the liquid absorption layer squeezed in the first and second squeezing grooves exhibits capillary action, so that the exudate that has passed through the openings in the inner surface layer is absorbed through the first and second squeezing grooves. The exudate can be quickly moved in the liquid layer, and further, the exudate can be diffused and held in the portion of the liquid absorption layer where the first and second pressing grooves are not formed. Absorption retention capacity is improved.
図１〜３を参照すると、本願発明の食品容器１は底面２と、底面２の周縁３から立ちあがる周壁面４とを有する。食品容器１は、その内面５が非吸液性かつ透液性の内面層７で形成され、外面９が非吸液性かつ非透液性の外面層８で形成される。また、内面層７と外面層８との間には、吸液性の吸液層１０が配置される。本実施形態の内面層７は、開孔６を有する非吸液性かつ透液性の熱可塑性樹脂製のフィルムからなる。 1 to 3, the food container 1 of the present invention has a bottom surface 2 and a peripheral wall surface 4 rising from a peripheral edge 3 of the bottom surface 2. The food container 1 has an inner surface 5 formed of a non-liquid-absorbing and liquid-permeable inner surface layer 7 and an outer surface 9 formed of a non-liquid-absorbing and non-liquid-permeable outer surface layer 8. Further, a liquid absorbing layer 10 having a liquid absorbing property is disposed between the inner surface layer 7 and the outer surface layer 8. The inner surface layer 7 of the present embodiment is made of a non-liquid-absorbing and liquid-permeable thermoplastic resin film having openings 6.
食品容器１の内面５には、底面２の周縁３に沿って延び、内面層７を吸液層１０とともに食品容器１の内面側から外面側に向け圧縮して形成された第１圧搾溝１１と、第１圧搾溝１１に連結して周壁面４に沿って周壁面４の外端縁１３に向けて延び出し、内面層７を吸液層１０とともに食品容器１の内面側から外面側に向け圧縮して形成された第２圧搾溝１２とが設けられている。周壁面４は起伏を繰り返す襞形状を有し、第２圧搾溝１２は、食品容器１の内面側から見て、襞形状の谷部に形成されている。 A first compressed groove 11 formed on the inner surface 5 of the food container 1 along the peripheral edge 3 of the bottom surface 2 and formed by compressing the inner surface layer 7 together with the liquid absorption layer 10 from the inner surface side to the outer surface side of the food container 1. And it connects with the 1st pressing groove 11, it extends toward the outer end edge 13 of the surrounding wall surface 4 along the surrounding wall surface 4, and the inner surface layer 7 with the liquid absorption layer 10 from the inner surface side of the food container 1 to an outer surface side The 2nd pressing groove 12 formed by compressing toward is provided. The peripheral wall surface 4 has a bowl shape that repeats ups and downs, and the second pressing groove 12 is formed in a trough-shaped valley when viewed from the inner surface side of the food container 1.
内面層７に設けられる開孔６の形状及び寸法の制限は特に無く、食品からの滲出液が通過することができ、食品が開孔６において直接吸液層１０に接触しない形状及び寸法であればよい。一例を挙げると、開孔６が円形でフィルム厚が２０〜５０μの場合、開孔６の直径を０．３〜３．０ｍｍにすることができるが、これに限定されない。また、内面層７には、熱可塑性樹脂の繊維から成る不織布を用いることもでき、例えば単位面積当たり質量が３０〜８０ｇ／ｍ２のエアスルー不織布を用いることもできる。内面層７を形成するための熱可塑性樹脂には、ポリエチレン、ポリプロピレン、エチレン共重合体、プロピレン共重合体等のオレフィン樹脂、ポリエチレンテレフタレート等のポリエステル樹脂、ポリビニルアルコール樹脂等の、食品包装の分野で公知の材料を用いることができる。また、親水化処理した熱可塑性樹脂を用いて内面層７を形成することもできる。 There is no particular limitation on the shape and size of the opening 6 provided in the inner surface layer 7, and the shape and size of the exudate from the food can pass therethrough and the food does not directly contact the liquid absorbing layer 10 in the opening 6. That's fine. As an example, when the aperture 6 is circular and the film thickness is 20 to 50 μm, the diameter of the aperture 6 can be 0.3 to 3.0 mm, but is not limited thereto. The inner surface layer 7 can be made of a nonwoven fabric made of thermoplastic resin fibers. For example, an air-through nonwoven fabric having a mass per unit area of 30 to 80 g / m 2 can be used. Thermoplastic resins for forming the inner surface layer 7 include olefin resins such as polyethylene, polypropylene, ethylene copolymers, and propylene copolymers, polyester resins such as polyethylene terephthalate, and polyvinyl alcohol resins. Known materials can be used. The inner surface layer 7 can also be formed using a thermoplastic resin that has been subjected to a hydrophilic treatment.
熱可塑性樹脂のフィルムに開孔６を設ける場合、パーフォレーション、針セグメントを取り付けた加熱ロールと受けロールとの組み合わせ等の、フィルムに開孔６を形成するための公知の手段を用いることができる。パーフォレーションや針セグメントを用いて開孔６を形成するときは、内面層７から吸液層１０に向かう方向に孔をあけ、開孔６の縦断面形状が内面層７の表面から吸液層１０に向けてなだらかな曲線を描くようにすることが好ましい。これにより、滲出液の開孔６への流入を促進することができる。 When the opening 6 is provided in the thermoplastic resin film, known means for forming the opening 6 in the film, such as perforation, a combination of a heating roll attached with a needle segment and a receiving roll, can be used. When the opening 6 is formed using perforation or a needle segment, a hole is formed in the direction from the inner surface layer 7 toward the liquid absorbing layer 10, and the longitudinal cross-sectional shape of the opening 6 is from the surface of the inner surface layer 7 to the liquid absorbing layer 10. It is preferable to draw a gentle curve toward Thereby, the inflow of exudate into the opening 6 can be promoted.
吸液層１０には、パルプ繊維を主成分としたパルプ不織布を用いることが好ましく、エアレイドパルプ不織布を用いることがより好ましい。パルプ不織布に熱可塑性樹脂の繊維やバインダーが含まれていてもよいが、パルプ含有量が高いことが好ましい。吸液層１０の質量の制限は特にないが、典型的には３０〜１２０ｇ／ｍ２である。吸液層１０の厚さにも特に制限は無いが、刺身や生肉等の、ドリップ液が食品の鮮度に影響を及ぼす食品に用いる食品容器１の場合には、ドリップ液を吸収する能力を確保するため、０．５０ｍｍ以上の厚さの吸液層１０を用いることが好ましい。 For the liquid absorbing layer 10, it is preferable to use a pulp nonwoven fabric mainly composed of pulp fibers, and it is more preferable to use an airlaid pulp nonwoven fabric. The pulp nonwoven fabric may contain fibers or binders of thermoplastic resin, but preferably has a high pulp content. Although there is no restriction | limiting in particular of the mass of the liquid absorption layer 10, Typically, it is 30-120 g / m < 2 >. The thickness of the liquid absorbing layer 10 is not particularly limited, but in the case of the food container 1 used for foods such as sashimi and raw meat where the drip liquid affects the freshness of the food, the ability to absorb the drip liquid is secured. Therefore, it is preferable to use the liquid absorbing layer 10 having a thickness of 0.50 mm or more.
外面層８は非透液性の防漏シートであり、ポリオレフィン樹脂、ポリエステル樹脂、ポリビニルアルコール樹脂等の、食品包装の分野で公知の熱可塑性樹脂からなるシートのほか、アルミ箔を用いることもできる。外面層８には開孔６は設けない。 The outer surface layer 8 is a liquid-impervious leak-proof sheet, and in addition to a sheet made of a thermoplastic resin known in the field of food packaging such as polyolefin resin, polyester resin, polyvinyl alcohol resin, aluminum foil can also be used. . No opening 6 is provided in the outer surface layer 8.
食品容器１は、内面層７、吸液層１０、及び外面層８となるシート素材を互いに接合させた複合シートを用いて製造する。各シートの接合は、ホットメルト接着剤（ＨＭＡ）を用いて行うことができるほか、ドライラミネーション、ウェットラミネーション、エキストルージョン等の公知の方法を用いて行うことができる。接合にホットメルト接着剤を用いる場合は、開孔６が塞がれないよう、ホットメルト接着剤をドット状やスパイラル状に塗布することが好ましい。また、ホットメルト接着剤の塗布量は、吸液層１０の吸収能力を損なわないようにするために、５ｇ／ｍ２以下であることが好ましく、３ｇ／ｍ２以下であることがより好ましい。なお、図３ではホットメルト接着剤の図示は省略している。 The food container 1 is manufactured using a composite sheet in which sheet materials to be the inner surface layer 7, the liquid absorbing layer 10, and the outer surface layer 8 are bonded to each other. Each sheet can be joined using a hot melt adhesive (HMA) or a known method such as dry lamination, wet lamination, or extrusion. When using a hot melt adhesive for joining, it is preferable to apply the hot melt adhesive in a dot shape or a spiral shape so that the openings 6 are not blocked. The amount of hot melt adhesive applied is preferably 5 g / m 2 or less and more preferably 3 g / m 2 or less so as not to impair the absorption capacity of the liquid absorbing layer 10. In FIG. 3, the hot melt adhesive is not shown.
食品容器１は、所与の形状を有する雌雄一対の金型を用いて、内面層７、吸液層１０、及び外面層８を含む複合シートを加熱下においてプレス成型することにより得ることができる。このプレス成型に用いられる雄金型には、第１及び第２圧搾溝１１、１２に対応する形状の突起部が設けられる。なお、食品容器１の成型に用いる複合シートは、１つの食品容器１に対応した大きさでもよいし、多数の食品容器１に対応した大きさでもよい。 The food container 1 can be obtained by press-molding a composite sheet including the inner surface layer 7, the liquid absorbing layer 10, and the outer surface layer 8 under heating using a pair of male and female molds having a given shape. . The male mold used for the press molding is provided with a protrusion having a shape corresponding to the first and second pressing grooves 11 and 12. In addition, the size corresponding to one food container 1 may be sufficient as the composite sheet used for the shaping | molding of the food container 1, and the magnitude | size corresponding to many food containers 1 may be sufficient as it.
プレス成型する際、第１及び第２圧搾溝１１、１２において、内面層７、吸液層１０、及び外面層８を含む複合シートの厚さを３０％以上圧縮することが好ましい。別言すれば、第１及び第２圧搾溝１１、１２の厚みを、第１及び第２圧搾溝１１、１２が形成されていない部分の厚みに対し、３０％以上減少させることが好ましい。これにより、食品容器１の底面２の周縁３に沿って延びる第１圧搾溝１１、及び第１圧搾溝１１から周壁面４に沿って延び出す第２圧搾溝１２に位置する吸液層１０が高密度化されるので、食品容器１に安定した骨格構造を付与し、形状を安定化させることができる。これと同時に、第１及び第２圧搾溝１１、１２において、滲出液を吸液層１０内において移動させるために必要な毛細管現象を生じさせることができる。すなわち、食品容器１の底面２に位置する第１圧搾溝１１から、第１圧搾溝１１に連結されて周壁面４に沿って周壁面の外端縁１３に向けて延び出す第２圧搾溝１２へ、滲出液を毛細管現象により重力に反する方向に速やかに移動させる経路が形成される。これにより、第１圧搾溝１１から第２圧搾溝１２へ移動させた滲出液を、周壁面４において第２圧搾溝１２が形成されていない部分の吸液層１０に拡散・保持させて、滲出液が食品容器１内に逆戻りすることを防止できる。 When press molding, it is preferable to compress the thickness of the composite sheet including the inner surface layer 7, the liquid absorbing layer 10, and the outer surface layer 8 by 30% or more in the first and second compressed grooves 11 and 12. In other words, it is preferable to reduce the thickness of the first and second pressing grooves 11 and 12 by 30% or more with respect to the thickness of the portion where the first and second pressing grooves 11 and 12 are not formed. Thereby, the liquid absorption layer 10 located in the 1st pressing groove 11 extended along the peripheral edge 3 of the bottom face 2 of the food container 1 and the 2nd pressing groove 12 extended along the surrounding wall surface 4 from the 1st pressing groove 11 is provided. Since the density is increased, the food container 1 can be provided with a stable skeleton structure and the shape can be stabilized. At the same time, in the first and second compressed grooves 11 and 12, a capillary phenomenon necessary for moving the exudate in the liquid absorbing layer 10 can be generated. That is, the second pressing groove 12 connected to the first pressing groove 11 and extending toward the outer edge 13 of the peripheral wall surface along the peripheral wall surface 4 from the first pressing groove 11 located on the bottom surface 2 of the food container 1. Thus, a path for rapidly moving the exudate in a direction against gravity due to capillary action is formed. As a result, the exudate that has been moved from the first pressing groove 11 to the second pressing groove 12 is diffused and held in the liquid absorbing layer 10 of the peripheral wall surface 4 where the second pressing groove 12 is not formed, and exudation is performed. The liquid can be prevented from returning to the food container 1.
より詳しくは、食品容器１内に食品を入れたとき、食品から食品容器１の底面２に滲み出した滲出液は、底面２の開孔６を通過して、第１圧搾溝１１が設けられていない部分の吸液層１０中に拡散する。底面２の開孔６だけでは吸収しきれなかった滲出液は、一旦周縁３に位置する第１圧搾溝１１内に貯まる。その後、滲出液は第１圧搾溝１１に位置する開孔６を通過して、第１圧搾溝１１から第１圧搾溝１１に連結された第２圧搾溝１２へ向け、毛細管現象により重力に反する方向に移動する。さらに、第２圧搾溝１２へ移動した滲出液は、周壁面４において第２圧搾溝１２が形成されていない部分の吸液層１０中に拡散し、保持される（図４（ａ）参照）。このように、食品からの滲出液は食品容器１の底面２へ滲み出し、第１圧搾溝１１内に貯まりやすいので、食品容器１の底面２に少なくとも１つの開孔６を配置することが好ましく、第１圧搾溝１１に少なくとも１つの開孔６を配置することがより好ましい。 More specifically, when the food is put into the food container 1, the exudate that has exuded from the food to the bottom surface 2 of the food container 1 passes through the opening 6 in the bottom surface 2, and the first pressing groove 11 is provided. It diffuses into the liquid absorbing layer 10 in the portion that is not. Exudate that could not be absorbed by only the opening 6 in the bottom surface 2 is temporarily stored in the first pressing groove 11 located at the peripheral edge 3. Thereafter, the exudate passes through the opening 6 located in the first pressing groove 11 and is directed against gravity by a capillary phenomenon from the first pressing groove 11 toward the second pressing groove 12 connected to the first pressing groove 11. Move in the direction. Furthermore, the exudate that has moved to the second pressing groove 12 is diffused and held in the liquid absorbing layer 10 in the portion where the second pressing groove 12 is not formed on the peripheral wall surface 4 (see FIG. 4A). . Thus, since the exudate from the food oozes out to the bottom surface 2 of the food container 1 and easily accumulates in the first pressing groove 11, it is preferable to arrange at least one opening 6 in the bottom surface 2 of the food container 1. More preferably, at least one aperture 6 is disposed in the first compressed groove 11.
図４（ａ），（ｂ）と表１に、吸液層１０にエアレイドパルプを用いた本発明の食品容器１（実施例１）と、エアレイドパルプの代わりに吸水紙を用いた比較例の吸収試験結果を示す。表１に示すように、図４（ａ）と図４（ｂ）の食品容器１は、吸液層１０の材質のみが異なっている。なお、内面層７には、同一の開孔パターンを有するポリオレフィンフィルムを用いた。 4 (a) and 4 (b) and Table 1, the food container 1 of the present invention using airlaid pulp for the liquid absorbing layer 10 (Example 1), and a comparative example using water absorbent paper instead of airlaid pulp. The absorption test result is shown. As shown in Table 1, the food container 1 shown in FIGS. 4A and 4B is different only in the material of the liquid absorption layer 10. The inner surface layer 7 was a polyolefin film having the same opening pattern.
吸収試験では、赤色に着色した０．９％生理食塩水、及び食用油を試験液として用い、これらの試験液を食品容器１の底面２に１．０ｍｌ滴下し、ストップウォッチで計測して５分間吸収させた。測定に用いた赤色の生理食塩水の組成は次の通りである。
０．９％ＮａＣｌ（１Ｌ）＋ 黄色５号（１．６３ｇ）＋ 赤色１０２号（８．５ｇ）＋ 赤色２号（２ｇ）
In the absorption test, 0.9% saline colored red and edible oil were used as test solutions, and 1.0 ml of these test solutions were dropped on the bottom surface 2 of the food container 1 and measured with a stopwatch. Absorbed for minutes. The composition of the red physiological saline used for the measurement is as follows.
0.9% NaCl (1 L) + Yellow No. 5 (1.63 g) + Red No. 102 (8.5 g) + Red No. 2 (2 g)
成型後の食品容器１の吸収能力は、成型前の複合シートに吸収された試験液の量と、成型後の食品容器１の非圧搾部（第１及び第２圧搾溝１１、１２が無い部分）に吸収された試験液の量とを対比することにより評価した。なお、食品容器１の非圧搾部のサンプルは、底面２から２ｃｍ×２ｃｍのシート片を切り抜くことにより調製した。 The absorption capacity of the food container 1 after molding is determined by the amount of the test liquid absorbed in the composite sheet before molding and the non-compressed portion of the food container 1 after molding (the portion without the first and second pressing grooves 11 and 12). ) Was compared with the amount of the test solution absorbed. In addition, the sample of the non-pressed part of the food container 1 was prepared by cutting out a 2 cm × 2 cm sheet piece from the bottom surface 2.
厚み測定は、ピーコック社製ＰＤＮ−２０型厚み測定器（測定子の直径８ｍｍ、測定力標準（スピンドル下方向）１．３Ｎ）を用いて行った。圧搾部（第１及び第２圧搾溝１１、１２）と、非圧搾部の厚みは、それぞれについて１０か所の厚みを測定し、その平均値を計算することにより求めた。 Thickness measurement was performed using a PDN-20 type thickness measuring device (diameter 8 mm, measuring force standard (spindle downward direction) 1.3 N) manufactured by Peacock. The thickness of the pressing parts (first and second pressing grooves 11 and 12) and the non-squeezing part was determined by measuring the thickness at 10 locations and calculating the average value.
図４（ａ）に示すように、本発明の食品容器１では、底面２に滴下した試験液は周壁面４の第２圧搾溝１２へと移動し、さらに周壁面４の第２圧搾溝１２が形成されていない部分へ拡散した後、保持された。また、周壁面４の第２圧搾溝１２が形成されていない部分には、試験液が拡散していない部分が残っていた。これに対し、比較例では、吸水紙の質量が本発明で用いたエアレイドパルプの質量と同一であるにも関わらず吸収量が低く、試験液の一部が吸収されずに容器の表面に残留していた。また、表１に示すように、試験液として食用油を用いた場合でも、本発明の食品容器１は比較例より高い吸収性を示したことから、本発明の食品容器１は、水分の多いおかずだけでなく、油分の多いおかずにも適していることが分かる。 As shown to Fig.4 (a), in the food container 1 of this invention, the test liquid dripped at the bottom face 2 moves to the 2nd pressing groove 12 of the surrounding wall surface 4, and also the 2nd pressing groove 12 of the surrounding wall surface 4 is. Was retained after being diffused to the part where no was formed. Moreover, the part which the test liquid has not spread | diffused remained in the part in which the 2nd pressing groove 12 of the surrounding wall surface 4 was not formed. On the other hand, in the comparative example, although the mass of the water absorbent paper is the same as the mass of the airlaid pulp used in the present invention, the absorption amount is low, and a part of the test liquid remains on the surface of the container without being absorbed. Was. Moreover, as shown in Table 1, even when edible oil was used as the test solution, the food container 1 of the present invention showed higher absorbability than the comparative example, and therefore the food container 1 of the present invention has much moisture. It turns out that it is suitable not only for side dishes but also for side dishes with a lot of oil.
表２から明らかなように、圧搾部（第１及び第２圧搾溝１１、１２）の厚みを、非圧搾部の厚みに対し３０％以上低い値にすることにより、良好な吸収性が得られることが示された。また、内面層７に不織布を用いた場合でも、良好な吸収性が得られることが示された。さらに、表１及び表２に示す結果から、本願発明に係る食品容器１を構成する内面層７、吸液層１０、及び外面層８から成る複合シートは、成型前後での吸収能力の差はほとんどないことが分かった。 As is apparent from Table 2, good absorbability can be obtained by setting the thickness of the compressed parts (first and second compressed grooves 11 and 12) to a value lower by 30% or more than the thickness of the non-compressed part. It was shown that. Moreover, even when a nonwoven fabric was used for the inner surface layer 7, it was shown that good absorbability can be obtained. Furthermore, from the results shown in Tables 1 and 2, the composite sheet composed of the inner surface layer 7, the liquid absorbing layer 10 and the outer surface layer 8 constituting the food container 1 according to the present invention has a difference in absorption capacity before and after molding. I found that there was almost no.
以上に記載した本発明に関する開示は、少なくとも下記事項に要約することができる。
内面及び外面と、底面と、前記底面の周縁から起立する周壁面と、透液性の内面層と、非透液性の外面層と、前記内面層と前記外面層との間に配置される吸液性の吸液層とを有する食品容器であって、前記内外面層及び前記吸液層を形成する複合シートと、前記内面において前記底面の前記周縁に沿って環状に延びる第１圧縮溝と、前記周壁面において周方向へ互いに間隔を空けて前記第１圧縮溝から前記周壁面の外端縁まで延びる複数条の第２圧縮溝とをさらに有し、前記第１及び第２圧縮溝は、前記内面層と前記吸液層とを前記内面側から前記外面側へ向かって圧縮して形成されており、前記第１及び第２圧縮溝の厚さ寸法は、前記複合シートの厚さ寸法の７０％以下であり、前記底面には、前記内面層を貫通する複数の開孔が形成されており、前記開孔の縦断面形状が前記内面側の表面から前記吸液層に向けてなだらかな曲線であって、前記複合シートは、ドット状又はスパイラル状に塗布された質量５ｇ／ｍ ２ 以下のホットメルト接着剤を介して接合されており、前記底面に滲出した滲出液が前記開孔から前記吸液層に吸収されるとともに、前記第１圧縮溝から前記第２圧縮溝に沿って前記外端縁へ向かって移動することを特徴とする。
The disclosure relating to the present invention described above can be summarized in at least the following matters.
An inner surface and an outer surface, a bottom surface, a peripheral wall surface rising from a peripheral edge of the bottom surface, a liquid permeable inner surface layer, a non-liquid permeable outer surface layer, and the inner surface layer and the outer surface layer are disposed. A food container having a liquid-absorbing liquid- absorbing layer, the composite sheet forming the inner and outer surface layers and the liquid-absorbing layer, and a first compressed groove extending annularly along the peripheral edge of the bottom surface on the inner surface And a plurality of second compression grooves extending from the first compression groove to the outer edge of the peripheral wall surface at intervals in the circumferential direction on the peripheral wall surface, and the first and second compression grooves Is formed by compressing the inner surface layer and the liquid absorbing layer from the inner surface side toward the outer surface side, and the thickness dimension of the first and second compression grooves is the thickness of the composite sheet. The bottom surface is formed with a plurality of apertures penetrating the inner surface layer. Cage, a gentle curve toward the longitudinal sectional shape of the inner side surface of the opening in the liquid-absorbing layer, the composite sheet, the mass 5 g / m 2 or less, which is applied in a dot or spiral The exudate that has exuded to the bottom surface is absorbed into the liquid absorbing layer from the opening and from the first compressed groove along the second compressed groove. It moves to an outer edge, It is characterized by the above-mentioned.
本発明は、少なくとも下記の実施の形態を含むことができる。
（１）内面層が、熱可塑性樹脂から成り、複数の前記開孔を有する透液性のフィルムを含む。
（２）第１圧搾溝が少なくとも１つの開孔を有する。
（３）吸液層がパルプ不織布を含む。
（４）内面層が、熱可塑性樹脂の繊維で形成された透液性の不織布を含む。
（５）底面に、第１圧縮溝に連結する十字型の圧縮溝を設ける。
The present invention can include at least the following embodiments.
(1) The inner layer includes a liquid-permeable film made of a thermoplastic resin and having a plurality of the openings.
( 2 ) The first pressing groove has at least one opening.
( 3 ) The liquid absorption layer includes a pulp nonwoven fabric.
( 4 ) The inner surface layer includes a liquid-permeable nonwoven fabric formed of thermoplastic resin fibers.
(5) A cross-shaped compression groove connected to the first compression groove is provided on the bottom surface.
本発明について実施形態に基づき説明したが、本発明の範囲はそれに限定されない。例えば、食品容器１の底面２に、第１圧搾溝１１に連結する十字型の圧搾溝を設ける等、追加の圧搾溝を設けることもできる。また、周壁面４において第２圧搾溝１２が襞形状の谷部に形成されている例を示したが、第２圧搾溝１２を、襞形状の山部と谷部に設けることもできる。なお、本明細書及び特許請求の範囲において使用されている「第１」及び「第２」の用語は、同様の要素、位置等を単に区別するために用いている。 Although the present invention has been described based on the embodiments, the scope of the present invention is not limited thereto. For example, an additional squeezing groove can be provided on the bottom surface 2 of the food container 1, such as a cross-shaped squeezing groove connected to the first squeezing groove 11. Moreover, although the example in which the 2nd pressing groove 12 was formed in the trough-shaped trough part in the surrounding wall surface 4 was shown, the 2nd pressing groove 12 can also be provided in a trough-shaped peak part and trough part. It should be noted that the terms “first” and “second” used in the present specification and claims are merely used to distinguish similar elements, positions, and the like.
１ 食品容器
２ 底面
３ 周縁
４ 周壁面
５ 内面
６ 開孔
７ 内面層
８ 外面層
９ 外面
１０ 吸液層
１１ 第１圧搾溝（第１溝）
１２ 第２圧搾溝（第２溝）
１３ 外端縁
DESCRIPTION OF SYMBOLS 1 Food container 2 Bottom face 3 Perimeter edge 4 Perimeter wall surface 5 Inner surface 6 Opening hole 7 Inner surface layer 8 Outer surface layer 9 Outer surface 10 Liquid absorption layer 11 1st pressing groove (1st groove)
12 Second pressing groove (second groove)
13 Outer edge
Claims (6)
前記内外面層及び前記吸液層を形成する複合シートと、前記内面において前記底面の前記周縁に沿って環状に延びる第１圧縮溝と、前記周壁面において周方向へ互いに間隔を空けて前記第１圧縮溝から前記周壁面の外端縁まで延びる複数条の第２圧縮溝とをさらに有し、
前記第１及び第２圧縮溝は、前記内面層と前記吸液層とを前記内面側から前記外面側へ向かって圧縮して形成されており、
前記第１及び第２圧縮溝の厚さ寸法は、前記複合シートの厚さ寸法の７０％以下であり、
前記底面には、前記内面層を貫通する複数の開孔が形成されており、
前記開孔の縦断面形状が前記内面側の表面から前記吸液層に向けてなだらかな曲線であって、
前記複合シートは、ドット状又はスパイラル状に塗布された質量５ｇ／ｍ ２ 以下のホットメルト接着剤を介して接合されており、
前記底面に滲出した滲出液が前記開孔から前記吸液層に吸収されるとともに、
前記第１圧縮溝から前記第２圧縮溝に沿って前記外端縁へ向かって移動することを特徴とする食品容器。 An inner surface and an outer surface, a bottom surface, a peripheral wall surface rising from a peripheral edge of the bottom surface, a liquid permeable inner surface layer, a non-liquid permeable outer surface layer, and the inner surface layer and the outer surface layer are disposed. A food container having a liquid-absorbing liquid-absorbing layer,
The composite sheet forming the inner and outer surface layers and the liquid absorbing layer, the first compression groove extending annularly along the peripheral edge of the bottom surface on the inner surface, and the first circumferentially spaced apart circumferential surfaces on the peripheral wall surface. A plurality of second compressed grooves extending from one compressed groove to the outer edge of the peripheral wall surface;
The first and second compression grooves are formed by compressing the inner surface layer and the liquid absorption layer from the inner surface side toward the outer surface side,
The thickness dimension of the first and second compressed grooves is 70% or less of the thickness dimension of the composite sheet,
A plurality of apertures penetrating the inner surface layer are formed on the bottom surface ,
The vertical cross-sectional shape of the opening is a gentle curve from the surface on the inner surface side toward the liquid absorption layer,
The composite sheet is bonded via a hot melt adhesive having a mass of 5 g / m 2 or less applied in a dot shape or a spiral shape ,
The exudate that has exuded on the bottom surface is absorbed into the liquid absorption layer from the opening,
Food container, characterized in that moving towards the outer edge along the first compressed grooves in the second compressed grooves.
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| JP2011195168A (en) * | 2010-03-19 | 2011-10-06 | Toyo Aluminum Ekco Products Kk | Food storage container |
| JP5713605B2 (en) * | 2010-08-31 | 2015-05-07 | ユニ・チャーム株式会社 | Absorber |
-
2013
- 2013-03-28 JP JP2013070558A patent/JP6195721B2/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111301834A (en) * | 2020-04-01 | 2020-06-19 | 北京市昌平职业学校 | Novel takeaway box |
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| JP2014193732A (en) | 2014-10-09 |
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