JP6570021B1 - Storage bag for freshness preservation of fruits and vegetables - Google Patents
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Abstract
【課題】、短時間で保存環境に適応させることができ、枝豆やブロッコリー等の過湿状態でカビが成長し易く変色が起こり易い青果物の収納に適している上、製造が容易な青果物の鮮度保持用収納袋を提供する。【解決手段】収納袋１は、２軸延伸ポリプロピレンフィルムによって形成されており、左右の端縁が熱シールされている。また、その熱シール部分Ｍの最大厚みが、熱シール部分Ｍの幅に対して一定の割合の範囲内になるように調整されている。そして、その熱シールされた端縁から所定の距離の範囲内に、気体を透過させるための円形の透過孔Ｈが穿設されている。【選択図】図１PROBLEM TO BE SOLVED: For freshness of fruits and vegetables that can be adapted to a storage environment in a short time, and is suitable for storing fruits and vegetables that tend to grow and discolor easily in an excessively humid state such as green soybeans and broccoli. A holding storage bag is provided. A storage bag is formed of a biaxially stretched polypropylene film, and the left and right edges are heat-sealed. Further, the maximum thickness of the heat seal portion M is adjusted so as to fall within a certain range with respect to the width of the heat seal portion M. And the circular permeation | transmission hole H for permeate | transmitting gas is drilled in the range of the predetermined distance from the heat-sealed edge. [Selection] Figure 1
Description
本発明は、合成樹脂フィルムによって形成された青果物の鮮度保持用の収納袋に関するものである。 The present invention relates to a storage bag for maintaining freshness of fruits and vegetables formed of a synthetic resin film.
葉菜類、果菜類、根菜類、フルーツ、菌茸類等の各種の青果物を収納するための収納袋として、合成樹脂製のフィルムによって形成された二方袋、三方袋、合掌袋、パウチ、ガゼット袋等の収納袋が知られている。また、そのような合成樹脂製のフィルムからなる収納袋は、２枚の合成樹脂フィルムを重ねて（あるいは単一の合成樹脂フィルムを折り畳んで）外周をヒートシール（熱接着）することによって形成されることが多い。そのため、ヒートシールの容易性（比較的に低い温度でヒートシールできること）の観点から、ポリオレフィン樹脂製のフィルムによって形成された収納袋が広く用いられている（特許文献１）。 Two-sided bags, three-sided bags, pouches, pouches, gusset bags made of synthetic resin film as storage bags for storing various vegetables and fruits such as leaf vegetables, fruit vegetables, root vegetables, fruits, fungi, etc. Such storage bags are known. A storage bag made of such a synthetic resin film is formed by stacking two synthetic resin films (or folding a single synthetic resin film) and heat-sealing (thermal bonding) the outer periphery. Often. Therefore, a storage bag formed of a polyolefin resin film is widely used from the viewpoint of ease of heat sealing (capability of heat sealing at a relatively low temperature) (Patent Document 1).
また、ポリオレフィン樹脂製のフィルムからなる収納袋は、水蒸気透過度が低く、水蒸気の排出量が大きい青果物を収納して密封すると、フィルムの内面に水滴が付着して曇り、外観が低下してしまうため、微細な孔やスリットを設けて水蒸気透過度を調整したものも開発されている。 In addition, storage bags made of polyolefin resin films, when containing and sealing fruits and vegetables with low water vapor permeability and large water vapor discharge, cause water droplets to adhere to the inner surface of the film, resulting in cloudy appearance and poor appearance. Therefore, the thing which provided the fine hole and the slit and adjusted water vapor permeability is also developed.
しかしながら、特許文献１の如き微細な孔やスリットを設けたポリオレフィン系樹脂フィルムからなる従来の収納袋は、十分な水蒸気透過度（単位時間当たりの水蒸気透過度）を確保できないので短時間で保存環境に適応させることが困難であるため、枝豆やブロッコリー等の過湿状態でカビが成長し易く変色が起こり易い青果物の収納には適していない。また、微細な孔やスリットを設けたポリオレフィン系樹脂フィルムからなる収納袋は、製袋工程の途中でポリオレフィン系樹脂フィルムに微細な孔やスリットを均一に設けなければならないため、製造にコストおよび手間が掛かる、という不具合がある。 However, the conventional storage bag made of a polyolefin resin film provided with fine holes and slits as in Patent Document 1 cannot secure a sufficient water vapor permeability (water vapor permeability per unit time), so it can be stored in a short time. Therefore, it is not suitable for storing fruits and vegetables that tend to grow mold easily and change color in an excessively humid state such as green soybeans and broccoli. In addition, storage bags made of polyolefin resin films with fine holes and slits must be uniformly provided with fine holes and slits in the polyolefin resin film during the bag-making process, which is costly and laborious to manufacture. There is a problem that it takes.
本発明の目的は、上記従来の青果物の鮮度保持用の収納袋が有する問題点を解消し、短時間で保存環境に適応させることができ、枝豆やブロッコリー等の過湿状態でカビが成長し易く変色が起こり易い青果物の収納に適している上、製造が容易な青果物の鮮度保持用収納袋を提供することにある。 The object of the present invention is to solve the problems of the above-mentioned conventional storage bags for maintaining freshness of fruits and vegetables, and can be adapted to a storage environment in a short time, and mold grows in an excessively humid state such as green soybeans and broccoli. An object of the present invention is to provide a storage bag for keeping freshness of fruits and vegetables that is easy to manufacture and suitable for storing fruits and vegetables that are easily changed in color.
本発明の内、請求項１に記載された発明は、合成樹脂フィルムによって形成された青果物の鮮度保持用収納袋であって、少なくとも左右のいずれかの端縁が熱シールされており、その熱シール部分の最大厚みが、熱シール部分の幅の５５％以上１００％未満であるとともに、熱シールされた端縁から５０ｍｍの距離の範囲内に、気体を透過させるための少なくとも１つの透過孔が穿設されており、かつ、前記合成樹脂フィルムが、二軸延伸ポリプロピレンフィルム、ポリエチレンテレフタレートフィルム、あるいはポリ乳酸フィルムであることを特徴とする。
Among the present inventions, the invention described in claim 1 is a storage bag for keeping freshness of fruits and vegetables formed of a synthetic resin film, and at least one of the left and right edges is heat-sealed, and the heat The maximum thickness of the seal portion is 55% or more and less than 100% of the width of the heat seal portion, and at least one permeation hole for allowing gas to permeate is within a distance of 50 mm from the heat-sealed edge. The synthetic resin film is formed of a biaxially stretched polypropylene film, a polyethylene terephthalate film, or a polylactic acid film .
請求項２に記載された発明は、請求項１に記載された発明において、前記熱シール部分の最大厚みが、合成樹脂フィルムの厚みの２倍以上１２倍未満であることを特徴とするものである。 The invention described in claim 2 is characterized in that, in the invention described in claim 1, the maximum thickness of the heat sealing portion is not less than 2 times and less than 12 times the thickness of the synthetic resin film. is there.
請求項３に記載された発明は、請求項１、または請求項２に記載された発明において、前記透過孔が、０．００７ｍｍ２以上８０ｍｍ２以下の面積を有するものであることを特徴とするものである。 Invention described in claim 3 is the invention described in claim 1 or claim 2, wherein the transmission hole, characterized in that it is one having an area of 0.007 mm 2 or more 80 mm 2 or less Is.
請求項４に記載された発明は、請求項１〜３のいずれかに記載された発明において、合成樹脂フィルムが、１５μｍ以上４５μｍ未満の厚みを有しており、かつ、合成樹脂フィルムの熱シール部分に対して直交する方向の引張弾性率が３，０００ｋｇ／Ｎ以上４，５００ＭＰａ未満であることを特徴とするものである。 The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the synthetic resin film has a thickness of 15 μm or more and less than 45 μm, and the synthetic resin film is heat sealed. The tensile elastic modulus in the direction perpendicular to the portion is 3,000 kg / N or more and less than 4,500 MPa.
請求項５に記載された発明は、請求項１〜４のいずれかに記載された発明において、前記熱シール部分が、溶断シールによって形成されたものであることを特徴とするものである。 The invention described in claim 5 is the invention described in any one of claims 1 to 4, wherein the heat seal portion is formed by a fusing seal.
本発明に係る青果物の鮮度保持用収納袋は、透過孔の周囲の表裏の合成樹脂フィルムが開きにくいため、透過孔が大径であっても水蒸気やＣＯ２の透過量の微調整が可能である上、大径の透過孔を介して短時間で保存環境に適応させることができるため、鮮度保持効果に優れており、枝豆やブロッコリー等の過湿状態でカビが成長し易く変色が起こり易い青果物の収納にも適している。また、製造時に、製袋工程の途中で合成樹脂フィルムに複数の微細な孔やスリットを均一に設ける必要がないため、安価に、かつ、容易に製造することができる。 The storage bag for maintaining freshness of fruits and vegetables according to the present invention makes it possible to finely adjust the permeation amount of water vapor and CO 2 even if the permeation hole has a large diameter because the synthetic resin films on the front and back sides of the permeation hole are difficult to open. In addition, because it can be adapted to the storage environment in a short time through the large-diameter permeation holes, it has excellent freshness-keeping effects, and mold is likely to grow and discolor easily in overhumid conditions such as green soybeans and broccoli. Suitable for storing fruits and vegetables. In addition, since it is not necessary to uniformly provide a plurality of fine holes and slits in the synthetic resin film during the bag-making process during production, the production can be easily and inexpensively.
本発明に係る青果物の鮮度保持用収納袋（以下、単に、収納袋という）は、合成樹脂フィルムによって形成されており、少なくとも左右のいずれかの端縁が所定の形状になるように熱シールされているとともに、その熱シールされた端縁から所定の距離の範囲内に、気体を透過させるための少なくとも１つの透過孔が穿設されたものである。 The fruit and vegetable freshness-keeping storage bag (hereinafter simply referred to as a storage bag) according to the present invention is formed of a synthetic resin film and is heat-sealed so that at least one of the left and right edges has a predetermined shape. In addition, at least one permeation hole for allowing gas to permeate is formed within a predetermined distance from the heat-sealed edge.
本発明に係る収納袋を形成するための合成樹脂フィルムとしては、ポリオレフィンフィルム、ポリエステルフィルム等のヒートシールまたは溶断シールが可能な汎用の合成樹脂フィルムを好適に用いることができるが、それらの中でも、二軸延伸ポリプロピレンフィルム、ポリエチレンテレフタレートフィルムあるいはポリ乳酸フィルムを用いると、収納袋の透明性が高くなり、青果物を収納した場合に内部を見易くなるので好ましい。 As the synthetic resin film for forming the storage bag according to the present invention, a general-purpose synthetic resin film capable of heat sealing or fusing sealing such as polyolefin film and polyester film can be suitably used. It is preferable to use a biaxially stretched polypropylene film, a polyethylene terephthalate film or a polylactic acid film, since the transparency of the storage bag is increased and the inside of the storage bag can be easily seen when storing fruits and vegetables.
また、合成樹脂フィルムは、単一層からなるもので良いし、基材層の上に熱融着層等を積層した多層構造を有するものでも良いが、合成樹脂フィルムとして、基材層である二軸延伸ポリエチレンテレフタレートフィルムの上に、溶融押出ししたポリエチレンを熱融着層として積層させることによって形成された積層フィルムを用いることもできる。 The synthetic resin film may be a single layer or may have a multilayer structure in which a heat-sealing layer or the like is laminated on the base material layer. A laminated film formed by laminating melt-extruded polyethylene as a heat-fusible layer on an axially stretched polyethylene terephthalate film can also be used.
また、形成材料である合成樹脂フィルムの厚さは、特に限定されないが、５〜７５μｍの範囲であると好ましく、２０〜５０μｍの範囲であるとより好ましい。合成樹脂フィルムの厚さが５μｍを下回ると、フィルムの“腰”がなくなってしまい、青果物を収納する際に、袋を開にくくなる為、収納作業に時間がかかる上、収納後の商品にボリューム感がなく扱いにくくなるので好ましくない。反対に、合成樹脂フィルムの厚さが７５μｍを上回ると、フィルムの剛性が高くなりすぎて、青果物を収納しにくくなったり、収納した後の密封作業がしにくくなったりするので好ましくない。 Moreover, the thickness of the synthetic resin film as the forming material is not particularly limited, but is preferably in the range of 5 to 75 μm, and more preferably in the range of 20 to 50 μm. If the thickness of the synthetic resin film is less than 5 μm, the film “waist” will disappear and it will be difficult to open the bag when storing fruits and vegetables. There is no feeling and it is difficult to handle. On the other hand, if the thickness of the synthetic resin film exceeds 75 μm, the rigidity of the film becomes too high, and it becomes difficult to store fruits and vegetables, and it becomes difficult to perform the sealing work after storing.
また、本発明に係る収納袋は、各種の青果物（特に、枝豆やブロッコリー等の袋内が過湿状態となったときにカビが成長し易く、呼吸が激しく行われて変色し易いもの）を収納可能なものであるが、鮮度保持性を良好なものとするために、収納袋の内面が防曇性を有していることが好ましい。防曇性を付与する方法は、特に限定されるものではないが、収納袋を形成する合成樹脂原料中に予め防曇剤を含有させても良いし、収納袋の内面となるフィルム面に、防曇剤をコーティングしても良い。ここで用いる防曇剤としては、非イオン系の界面活性剤をあげることができ、防曇性と併せて帯電防止性を発揮するものを用いるのが好ましい。 In addition, the storage bag according to the present invention is a variety of fruits and vegetables (especially those that easily grow when the inside of the bag such as edamame or broccoli is overhumid, and that are easily respirationed and discolored). Although it can be stored, it is preferable that the inner surface of the storage bag has antifogging properties in order to improve the freshness retention. The method for imparting the antifogging property is not particularly limited, but may contain an antifogging agent in advance in the synthetic resin raw material forming the storage bag, or on the film surface serving as the inner surface of the storage bag, An antifogging agent may be coated. Examples of the antifogging agent include nonionic surfactants, and it is preferable to use an antifogging agent that exhibits antistatic properties in combination with antifogging properties.
そのような防曇剤としては、多価アルコールの脂肪酸エステル類、高級脂肪酸のアミン類、高級脂肪酸のアマイド類、ショ糖脂肪酸エステル類、高級脂肪酸のアミンやアマイドのエチレンオキサイド付加物等の非イオン系の界面活性剤を挙げることができる。そして、それらの防曇剤の中でも、ポリオキシエチレンアルキルアミン型、ポリオキシエチレンアルキルアミン脂肪酸エステル型、脂肪酸グリセリンエステル型を併用するのが好ましい。また、ポリビニルアルコール等の水溶性樹脂をコーティング剤として用いても良い。 Such anti-fogging agents include non-ionics such as fatty acid esters of polyhydric alcohols, higher fatty acid amines, higher fatty acid amides, sucrose fatty acid esters, higher fatty acid amines and amide ethylene oxide adducts, etc. Mention may be made of the surfactants of the system. Among these antifogging agents, it is preferable to use a polyoxyethylene alkylamine type, a polyoxyethylene alkylamine fatty acid ester type, and a fatty acid glycerin ester type in combination. A water-soluble resin such as polyvinyl alcohol may be used as a coating agent.
加えて、合成樹脂フィルムを形成する樹脂には、必要に応じて各層の特性を阻害しない範囲で、熱安定剤、酸化防止剤、光安定剤、滑剤、核剤、難燃剤、顔料、染料、炭酸カルシウム、硫酸バリウム、水酸化マグネシウム、マイカ、タルク、クレー、酸化亜鉛、酸化マグネシウム、酸化アルミニウム、抗菌剤、自然分解性を付与する添加剤等を添加することができる。さらに、熱可塑性樹脂、熱可塑性エラストマー、ゴム類、炭化水素樹脂、石油樹脂等を合成樹脂フィルムの特性を害さない範囲で配合しても良く、収納する青果物体内の水分の状態を制御するための特殊な処理を合成樹脂フィルムに施しても良い。 In addition, the resin that forms the synthetic resin film includes a heat stabilizer, an antioxidant, a light stabilizer, a lubricant, a nucleating agent, a flame retardant, a pigment, a dye, as long as the properties of each layer are not impaired as necessary. Calcium carbonate, barium sulfate, magnesium hydroxide, mica, talc, clay, zinc oxide, magnesium oxide, aluminum oxide, antibacterial agents, additives that impart natural degradability, and the like can be added. Furthermore, thermoplastic resins, thermoplastic elastomers, rubbers, hydrocarbon resins, petroleum resins, etc. may be blended within a range that does not impair the characteristics of the synthetic resin film, and for controlling the state of moisture in the stored fruits and vegetables. A special treatment may be applied to the synthetic resin film.
また、本発明に係る収納袋は、少なくとも左右のいずれかの端縁（すなわち、左右いずれかの端縁あるいは左右両側の端縁）が所定の形状に熱シール（溶断シール）されていることが必要である。図１は、本発明に係る収納袋の熱シール部分の水平断面を示したものであるが、具体的には、熱シール部分（図１におけるＭ）の厚み（図１におけるａ）が熱シール部分の幅（図１におけるｂ）に対して５５％以上１００％未満となるように調整する必要がある。熱シール部分の幅に対する熱シール部分の厚みが５５％未満であると、熱シール部分の内側の（表裏２枚の）合成樹脂フィルムの拘束力が小さくなり、（表裏２枚の）合成樹脂フィルムが開き易くなってしまうので好ましくなく、逆に熱シール部分の幅に対する熱シール部分の厚みが１００％を上回ると、熱シール部分の内側の（表裏２枚の）合成樹脂フィルムの拘束力が大きくなり、（表裏２枚の）合成樹脂フィルムが開きにくくなってしまうので好ましくない上に、さらに熱シール部分の幅に対する熱シール部分の厚みが大きくなりすぎると、熱シール部分の内側の（表裏２枚の）合成樹脂フィルムに熱歪みが生じてしまい、却って（表裏２枚の）合成樹脂フィルムが隙間なく当接しにくくなるので好ましくない。熱シール部分の幅に対する熱シール部分の厚みは、５８％以上９０％未満であるとより好ましく、６０％以上８５％未満であると特に好ましい。 In the storage bag according to the present invention, at least one of the left and right edges (that is, either the right or left edges or the left and right edges) is heat-sealed (fused and sealed) in a predetermined shape. is necessary. FIG. 1 shows a horizontal cross section of a heat seal portion of a storage bag according to the present invention. Specifically, the thickness (a in FIG. 1) of the heat seal portion (M in FIG. 1) is the heat seal. It is necessary to adjust the width of the portion (b in FIG. 1) to be 55% or more and less than 100%. When the thickness of the heat seal portion relative to the width of the heat seal portion is less than 55%, the binding force of the synthetic resin film (two front and back) inside the heat seal portion becomes small, and the synthetic resin film (two front and back) However, if the thickness of the heat seal portion with respect to the width of the heat seal portion exceeds 100%, the binding force of the synthetic resin film (two on the front and back sides) inside the heat seal portion is large. Therefore, it is not preferable because the synthetic resin film (two front and back sheets) is difficult to open. Further, if the thickness of the heat seal portion is too large with respect to the width of the heat seal portion, Thermal distortion occurs in the synthetic resin film), and the synthetic resin films (two sheets on the front and back sides) are difficult to come into contact with no gap. The thickness of the heat seal portion relative to the width of the heat seal portion is more preferably 58% or more and less than 90%, and particularly preferably 60% or more and less than 85%.
上記の如く、熱シール部分の最大厚みが、熱シール部分の幅に対して一定の割合になるように、熱シール時に合成樹脂フィルムを溶融させて収縮させることによって、その熱シール部分の内側の（表裏２枚の）合成樹脂フィルムの開き具合が調節可能となる。そして、本発明に係る収納袋は、そのように開き具合が調節可能となった部分（すなわち、熱シール部分から所定の距離（５０ｍｍ）内の部分）に、水蒸気やＣＯ２等の気体の出入りを促す透過孔を穿設することによって、（透過孔が比較的に大径のものであっても）水蒸気やＣＯ２の透過量を微調整することができる上、大径の透過孔を介して短時間で保存環境に適応させることが可能になっているため、きわめて良好な青果物の鮮度保持効果を奏することができる。 As described above, by melting and shrinking the synthetic resin film at the time of heat sealing so that the maximum thickness of the heat sealing portion is a constant ratio with respect to the width of the heat sealing portion, The opening degree of the synthetic resin film (two front and back) can be adjusted. The storage bag according to the present invention allows the gas such as water vapor and CO 2 to enter and exit the portion where the opening degree can be adjusted (that is, the portion within a predetermined distance (50 mm) from the heat seal portion). By piercing the permeation hole, it is possible to finely adjust the permeation amount of water vapor and CO 2 (even if the permeation hole has a relatively large diameter), and through the large-diameter permeation hole. Therefore, it is possible to adapt to the storage environment in a short time, so that it is possible to achieve a very good freshness maintaining effect of fruits and vegetables.
上記の如く熱シール部分の形状を調整する方法は、特に限定されないが、その一つとして、収納袋の左右の端縁を溶断シールする際の溶断シール装置における刃先（溶断刃）の温度、刃先の角度、溶断シールの速度を調整する方法を挙げることができる。具体的には、刃先（溶断刃）の温度を３００℃以上４５０℃未満の範囲内に調整し、刃先の角度を６０°以上１３０°未満の範囲内に調整するとともに、溶断シールの速度を６０個／分以上２００個／分未満の範囲内に調整するのが好ましい。 The method of adjusting the shape of the heat seal portion as described above is not particularly limited, but as one of them, the temperature of the cutting edge (cutting blade) in the fusing sealing device when fusing and sealing the left and right edges of the storage bag, the cutting edge The angle and the method of adjusting the fusing seal speed can be mentioned. Specifically, the temperature of the cutting edge (melting blade) is adjusted within the range of 300 ° C. or more and less than 450 ° C., the angle of the blade edge is adjusted within the range of 60 ° or more and less than 130 °, and the speed of the fusing seal is set to 60. It is preferable to adjust within the range of not less than 200 / min.
また、上記の如く所定の形状に熱シールされた部分から所定の距離（５０ｍｍ）内の部分に穿設する透過孔の大きさは、特に限定されないが、１個当たりの面積が０．００７ｍｍ２以上８０ｍｍ２以下であると、水蒸気やＣＯ２の透過量を調整し易く、青果物の鮮度保持効果が一段と良好なものとなるので好ましい。また、透過孔の個数も、特に限定されないが、合計の面積が０．０１６ｍｍ２以上１６０ｍｍ２以下であると、水蒸気やＣＯ２の透過量の調整が一層容易となり、青果物の鮮度保持効果がきわめて良好なものとなるので特に好ましい。さらに、熱シール部分の最大厚みが合成樹脂フィルムの厚みの２倍以上１２倍未満になるように熱シール部分の形状を調整すると、熱シール部分の内側の（表裏２枚の）合成樹脂フィルムの開きにくさ（開き易さ）が適度なものとなり、水蒸気やＣＯ２の透過量の調整が一段と容易なものとなるのできわめて好ましい。 Further, the size of the perforation hole drilled in the portion within the predetermined distance (50 mm) from the portion heat-sealed in the predetermined shape as described above is not particularly limited, but the area per one is 0.007 mm 2. When the thickness is 80 mm 2 or less, the permeation amount of water vapor or CO 2 is easy to adjust, and the freshness maintaining effect of fruits and vegetables becomes even better, which is preferable. The number of transmission holes is also not particularly limited, the area of the total is 0.016 mm 2 or more 160 mm 2 or less, adjustment of the permeation amount of water vapor and CO 2 becomes easier, freshness retaining effect of fruit and vegetables is very Since it becomes favorable, it is particularly preferable. Furthermore, when the shape of the heat seal part is adjusted so that the maximum thickness of the heat seal part is not less than 2 times and less than 12 times the thickness of the synthetic resin film, The difficulty of opening (easy to open) becomes moderate, and the adjustment of the permeation amount of water vapor and CO 2 becomes much easier, which is extremely preferable.
なお、透過孔を穿設する位置は、熱シールされた部分から所定の距離（５０ｍｍ）内であれば、特に限定されないが、４０ｍｍ以内であると、表裏２枚の合成樹脂フィルムの開き具合との相乗効果が得られ易くなり、水蒸気やＣＯ２の透過量をより調整し易くなるので好ましく、１０ｍｍ以内であるとより好ましく、０ｍｍであると（すなわち、熱シール部分に透過孔が穿設されていると）特に好ましい。 The position for forming the perforation hole is not particularly limited as long as it is within a predetermined distance (50 mm) from the heat-sealed portion, but if it is within 40 mm, the opening degree of the two synthetic resin films on the front and back sides This is preferable because it is easy to obtain the synergistic effect and the amount of permeation of water vapor and CO 2 is more easily adjusted, more preferably within 10 mm, and 0 mm (that is, a through hole is formed in the heat seal portion). Particularly preferred).
一方、透過孔の形状は、特に限定されず、円形、楕円形、矩形等の各種の形状にすることができる。加えて、熱シールされた部分から所定の距離（５０ｍｍ）内の部分であれば、袋本体に穿設する透過孔の位置も、特に限定されないが、袋本体の上端際（ヒートシール部分やジッパー等の密封手段から概ね５０ｍｍ以内）、あるいは袋本体の下端際（ヒートシール部分から概ね５０ｍｍ以内）に透過孔を設けると、青果物を収納して積層した場合でも、透過孔が塞がれにくく、安定した鮮度保持効果を発現できるので好ましい。 On the other hand, the shape of the transmission hole is not particularly limited, and can be various shapes such as a circle, an ellipse, and a rectangle. In addition, the position of the perforation hole drilled in the bag body is not particularly limited as long as it is a part within a predetermined distance (50 mm) from the heat-sealed part. If the perforation hole is provided near the lower end of the bag body (generally within 50 mm from the heat seal portion), even if the fruits and vegetables are stored and laminated, the permeation hole is not easily blocked. It is preferable because a stable freshness maintaining effect can be expressed.
また、本発明に係る収納袋に使用される合成樹脂フィルムの厚みや柔軟性、強度等も特に限定されないが、合成樹脂フィルムの厚みを１５μｍ以上４５μｍ未満に調整するとともに、合成樹脂フィルムの熱シール部分に対して直交する方向（すなわち、収納袋の幅方向）の引張弾性率を３，０００ｋｇ／Ｎ以上４，５００ＭＰａ未満に調整すると、熱シール部分の内側の（表裏２枚の）合成樹脂フィルムの開き具合を調整し易くなり、水蒸気やＣＯ２の透過量の調整がより容易になることから、青果物の鮮度保持効果がきわめて良好なものとなるので特に好ましい。 Further, the thickness, flexibility, strength, etc. of the synthetic resin film used in the storage bag according to the present invention are not particularly limited, but the thickness of the synthetic resin film is adjusted to 15 μm or more and less than 45 μm, and the synthetic resin film is heat sealed. When the tensile modulus in the direction perpendicular to the portion (that is, the width direction of the storage bag) is adjusted to 3,000 kg / N or more and less than 4,500 MPa, the synthetic resin film (two on the front and back sides) inside the heat seal portion It is particularly preferable because the freshness maintaining effect of fruits and vegetables becomes very good because the degree of opening of the fruits and vegetables can be easily adjusted, and the permeation amount of water vapor and CO 2 becomes easier.
さらに、本発明に係る収納袋の形状は、特に限定されず、左右および下部をヒートシールしてなる三方袋や、二つ折りされた合成樹脂フィルムの左右をヒートシールしてなる二方袋、パウチ等の各種の形状にすることが可能である。 Furthermore, the shape of the storage bag according to the present invention is not particularly limited, and a three-sided bag formed by heat-sealing the left and right and lower parts, a two-sided bag formed by heat-sealing the left and right of a folded synthetic resin film, and a pouch It is possible to make various shapes such as.
以下、実施例・比較例によって本発明に係る収納袋について詳細に説明するが、本発明の収納袋は、かかる実施例の態様に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲で、適宜変更することが可能である。また、実施例および比較例における特性の評価方法は以下の通りである。 Hereinafter, the storage bag according to the present invention will be described in detail by way of examples and comparative examples. However, the storage bag of the present invention is not limited to the embodiments of the examples and does not depart from the spirit of the present invention. Thus, it can be changed as appropriate. Moreover, the evaluation method of the characteristic in an Example and a comparative example is as follows.
＜熱シール部分の形状＞
実施例・比較例で得られた収納袋の左端縁の溶断シール部分（熱シール部分）の幅および厚みを株式会社ハイロックス社製デジタルマイクロスコープＫＨ−７７００（レンズＭＸＧ２５００ＲＥＺ Ｌｏｗ−Ｒａｎｇｅ １５０倍）によって測定した。
<Shape of heat seal part>
The width and thickness of the fusing seal part (heat seal part) at the left end edge of the storage bag obtained in the examples and comparative examples were measured with a digital microscope KH-7700 (lens MXG2500REZ Low-Range 150 times) manufactured by Hilox Corporation. It was measured.
＜引張弾性率＞
実施例・比較例において収納袋の製造に用いた合成樹脂フィルムを裁断して、長さ１５０ｍｍ×幅１５ｍｍ×厚さ０．５ｍｍのストリップ状のサンプルを作成した。そして、温度２３℃、相対湿度５０％の条件下で、ＪＩＳ Ｋ−７１２７に準拠し、島津株式会社製オートグラフＡＧ−１００Ｅ型を使用し、サンプルを１００ｍｍの距離を隔てたチャック間に掴み、引張速度２００ｍｍ／分で引っ張り、引張比例限度内における引張応力とそれに対応するひずみの比を引張弾性率として算出した。
<Tensile modulus>
In the examples and comparative examples, the synthetic resin film used for manufacturing the storage bag was cut to prepare a strip-shaped sample having a length of 150 mm, a width of 15 mm, and a thickness of 0.5 mm. Then, under the conditions of a temperature of 23 ° C. and a relative humidity of 50%, in accordance with JIS K-7127, using an autograph AG-100E type manufactured by Shimadzu Corporation, the sample is held between chucks separated by a distance of 100 mm, The sample was pulled at a pulling rate of 200 mm / min, and the ratio of the tensile stress within the tensile proportional limit to the corresponding strain was calculated as the tensile modulus.
＜鮮度保持特性（枝豆）＞
実施例・比較例で得られた収納袋（幅１５０ｍｍ×高さ２５０ｍｍのもの）に、約２５０ｇの枝豆を詰めた後に、その収納袋の上部をヒートシールすることによって収納袋を密封した。そして、その枝豆を収納した収納袋を、以下の２種類の温湿度・期間の条件下で保管した。しかる後、収納された枝豆の状態を、乾燥度合い、色および臭気の観点から下記の４段階で官能評価した。
・保管条件
ａ．２０℃×４０％ＲＨの雰囲気下で１２０時間（５日間）保管
ｂ．３０℃×８０％ＲＨの雰囲気下で７２時間（３日間）保管
・評価基準
◎：色・臭気において収納前のものとの違いがまったく認められない。
○：若干乾燥した様子であるものの、変色・異臭が認められない。
△：わずかな変色、微かな異臭が認められる。
×：全体的な乾燥、変色、明確な異臭、カビの発生、腐敗が認められる。
<Freshness retention characteristics (green soybean)>
About 250 g of green soybeans were packed in the storage bags (width 150 mm × height 250 mm) obtained in the examples and comparative examples, and then the upper portion of the storage bag was heat sealed to seal the storage bag. And the storage bag which accommodated the green soybeans was stored on the conditions of the following two types of temperature, humidity, and period. Thereafter, the state of the stored green soybeans was subjected to sensory evaluation in the following four stages from the viewpoint of dryness, color, and odor.
・ Storage conditions a. Store in an atmosphere of 20 ° C. × 40% RH for 120 hours (5 days) b. Storage / Evaluation Criteria for 72 hours (3 days) in an atmosphere of 30 ° C. × 80% RH: No difference in color / odor from that before storage.
○: Although it looks a little dry, no discoloration or off-flavor is observed.
Δ: Slight discoloration and slight odor
X: Overall drying, discoloration, clear off-flavor, mold generation, and decay are observed.
＜鮮度保持特性（ブロッッコリー）＞
実施例・比較例で得られた収納袋（幅２３０ｍｍ×高さ３２０ｍｍのもの）に、約３７０ｇのブロッッコリーを詰めた後に、その収納袋の上部をヒートシールすることによって収納袋を密封した。そして、そのブロッッコリーを収納した収納袋を、以下の２種類の温湿度・期間の条件下で保管した。しかる後、収納されたブロッッコリーの状態を、乾燥度合い、色、臭気および花蕾の落下の観点から下記の４段階で官能評価した。
・保管条件
ａ．２０℃×４０％ＲＨの雰囲気下で７２時間（３日間）保管
ｂ．２０℃×４０％ＲＨの雰囲気下で９６時間（４日間）保管
・評価基準
◎：色・臭気において収納前のものとの違いがまったく認められない。
○：若干乾燥した様子であるものの、変色・異臭が認められない。
△：わずかな変色、微かな異臭が認められる。
×：全体的な乾燥、変色、明確な異臭、カビの発生、腐敗、花蕾の落下が認められる。
<Freshness retention characteristics (broccoli)>
After storing about 370 g of broccoli in the storage bag (230 mm wide × 320 mm high) obtained in the examples and comparative examples, the storage bag was sealed by heat-sealing the upper part of the storage bag. The storage bag containing the broccoli was stored under the following two conditions of temperature and humidity. Thereafter, the state of the stored broccoli was subjected to sensory evaluation in the following four stages from the viewpoints of dryness, color, odor, and floret dropping.
・ Storage conditions a. Store in an atmosphere of 20 ° C. × 40% RH for 72 hours (3 days) b. Storage / Evaluation Criteria for 96 hours (4 days) in an atmosphere of 20 ° C. × 40% RH: No difference in color / odor from that before storage.
○: Although it looks a little dry, no discoloration or off-flavor is observed.
Δ: Slight discoloration and slight odor
X: Overall drying, discoloration, clear off-flavor, mold generation, decay, and floret fall are observed.
［実施例１］
防曇剤を練り込んだ厚さ２０μｍの長尺な二軸延伸ポリオレフィンフィルム（ＯＰＰフィルム 東洋紡(株)製 Ｐ５５６２）を、トタニ技研工業株式会社製高速サイドウェルド自動製袋機ＨＫ６５Ｖを用いて、長手方向に沿って二つ折りした後に、下記の条件にて、所定の間隔で溶断（ヒートシールおよび裁断）することによって（すなわち、ヒートシール後に裁断することによって）、所定の大きさ（幅１５０ｍｍ×高さ２５０ｍｍ、および、幅２３０ｍｍ×高さ３２０ｍｍの２種類）を有する２種類の二方袋（二つ折りしたＯＰＰフィルムの左右をヒートシールしたもの）を作製した。
＜溶断条件＞
・刃先の温度：４２０℃
・刃先の角度：１２０°
・溶断速度：１２０個／分（１ショット当たりの時間：０．４秒）
[Example 1]
A long biaxially stretched polyolefin film (OPP film, manufactured by Toyobo Co., Ltd., P5562) with a thickness of 20 μm kneaded with an anti-fogging agent is used with a high-speed side-weld automatic bag making machine HK65V manufactured by Totani Giken Kogyo Co., Ltd. After folding in half along the direction, by fusing (heat sealing and cutting) at predetermined intervals under the following conditions (that is, by cutting after heat sealing), a predetermined size (width 150 mm x height) Two types of two-sided bags (two-sided OPP film heat-sealed) having a thickness of 250 mm and a width of 230 mm and a height of 320 mm were prepared.
<Fusing conditions>
-Blade temperature: 420 ° C
・ Blade angle: 120 °
・ Fusing speed: 120 pieces / minute (time per shot: 0.4 seconds)
そして、その二方袋（袋本体）の熱シール部分から約１０．０ｍｍ内側の部分に、４．０ｍｍφの円形の透過孔（パンチ孔）を穿設することによって（透過孔の中心が熱シール部分から１０ｍｍ内側になるように穿設することによって）、実施例１の収納袋を得た。さらに、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。加えて、収納袋の製造に用いたＯＰＰフィルムの長手方向の引張弾性率（すなわち、収納袋における幅方向の引張弾性率）を上記した方法によって測定した。 Then, by making a 4.0 mmφ circular perforation hole (punch hole) in a portion about 10.0 mm inside from the heat seal portion of the two-sided bag (bag body) (the center of the permeation hole is heat sealed) The storage bag of Example 1 was obtained by drilling 10 mm inside from the part). Furthermore, the width and thickness of the heat seal part on the left side of the obtained storage bag were measured by the method described above. In addition, the tensile elastic modulus in the longitudinal direction of the OPP film used for manufacturing the storage bag (that is, the tensile elastic modulus in the width direction of the storage bag) was measured by the method described above.
図２は、実施例１の収納袋を示したものである。収納袋Ｐ１は、ＯＰＰフィルムによって形成された正面視矩形状の二方袋であり、左右の両端縁が溶断シールされている。そして、左側の溶断シール部分（熱シール分）から１０ｍｍ内側の部分に、４．０ｍｍφの円形の１個の透過孔Ｈが穿設されている（透過孔Ｈの面積＝約１２．５６ｍｍ２） FIG. 2 shows the storage bag of the first embodiment. Packaging bag P 1 is a front view rectangular two-sided bag which is formed by the OPP film, right and left end edges are fused seal. Then, one circular transmission hole H of 4.0 mmφ is drilled in a portion 10 mm inside from the left fusing seal portion (heat seal portion) (area of the transmission hole H = about 12.56 mm 2 ).
そして、上記の如く得られた２種類の収納袋の内の小型のもの（幅１５０ｍｍ×高さ２５０ｍｍのもの）を用いて、上記した方法によって、枝豆に対する収納袋の鮮度保持特性を評価した。一方、上記の如く得られた収納袋の内の大型のもの（幅２３０ｍｍ×高さ３２０ｍｍのもの）を用いて、上記した方法によって、ブロッコリーに対する収納袋の鮮度保持特性を評価した。それらの鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 And the freshness retention characteristic of the storage bag with respect to green soybeans was evaluated by the above-described method using a small one (width 150 mm × height 250 mm) of the two types of storage bags obtained as described above. On the other hand, the freshness-keeping property of the storage bag against broccoli was evaluated by the above-described method using a large one (width 230 mm × height 320 mm) of the storage bags obtained as described above. The evaluation results of the freshness retention characteristics are shown in Table 1 together with the properties and manufacturing conditions of the storage bags.
［実施例２］
収納袋を作製する際に、構成材料である合成樹脂フィルムを、防曇剤を練り込んだ厚さ２０μｍのＯＰＰフィルム（東洋紡(株)製 Ｐ５５６２）と厚さ２０μｍのＯＰＰフィルム（グンゼ(株)製 ＳＶＳ２）とのラミネートフィルムに変更するとともに、溶断条件を、以下のように変更した。
＜溶断条件＞
・刃先の温度：３８０℃
・刃先の角度：９０°
・溶断速度：９０個／分（１ショット当たりの時間：０．６秒）
[Example 2]
When producing a storage bag, a synthetic resin film as a constituent material is combined with a 20 μm thick OPP film (P5562 manufactured by Toyobo Co., Ltd.) and a 20 μm thick OPP film (Gunze Co., Ltd.). While changing to a laminate film with SVS2), the fusing conditions were changed as follows.
<Fusing conditions>
-Blade temperature: 380 ° C
・ Blade angle: 90 °
・ Fusing speed: 90 pieces / minute (time per shot: 0.6 seconds)
そして、それ以外は実施例１と同様にして実施例２の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定するとともに、収納袋の製造に用いたラミネートフィルムの長手方向の引張弾性率を上記した方法によって測定した。実施例２の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Otherwise, the storage bag of Example 2 was produced in the same manner as in Example 1, and the freshness retention characteristics of the storage bag were evaluated by the same method as in Example 1. Moreover, while measuring the width | variety and thickness of the heat seal part of the left side of the obtained storage bag by the above-mentioned method, the tensile elasticity modulus of the longitudinal direction of the laminate film used for manufacture of a storage bag was measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Example 2 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例３］
収納袋を作製する際に、構成材料である合成樹脂フィルムを、防曇剤を練り込んだ厚さ２０μｍの二軸延伸ポリ乳酸フィルム（三菱ケミカル(株)製 エコロージュＳＧ１０６）に変更するとともに、溶断条件を、以下のように変更した。
＜溶断条件＞
・刃先の温度：３７０℃
・刃先の角度：９０°
・溶断速度：１２０個／分（１ショット当たりの時間：０．４秒）
[Example 3]
When producing a storage bag, the synthetic resin film as a constituent material is changed to a 20 μm thick biaxially stretched polylactic acid film (Ecology Rouge SG106 manufactured by Mitsubishi Chemical Corporation) kneaded with an antifogging agent. The conditions were changed as follows.
<Fusing conditions>
-Blade temperature: 370 ° C
・ Blade angle: 90 °
・ Fusing speed: 120 pieces / minute (time per shot: 0.4 seconds)
そして、それ以外は、実施例１と同様にして実施例３の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定するとともに、収納袋の製造に用いた二軸延伸ポリ乳酸フィルムの長手方向の引張弾性率を上記した方法によって測定した。実施例３の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Otherwise, the storage bag of Example 3 was produced in the same manner as in Example 1, and the freshness retention characteristics of the storage bag were evaluated by the same method as in Example 1. Moreover, while measuring the width | variety and thickness of the heat seal part of the left side of the obtained storage bag by the above-mentioned method, the above-mentioned method was used for the tensile elastic modulus in the longitudinal direction of the biaxially stretched polylactic acid film used for manufacturing the storage bag. Measured by. The evaluation results of the freshness retention characteristics of the storage bag of Example 3 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例４］
収納袋を作製する際に、構成材料である合成樹脂フィルムを、二軸延伸ポリエチレンテレフタレートフィルムからなるベースフィルムの上にポリエステル樹脂を溶融押し出ししてなる総厚さ３２μｍのラミネートフィルム（中本パックス(株)製 ＨＳ−ＰＥＴ）に変更するとともに、溶断条件を、以下のように変更した。
＜溶断条件＞
・刃先の温度：３６０℃
・刃先の角度：６０°
・溶断速度：１００個／分（１ショット当たりの時間：０．５秒）
[Example 4]
When producing a storage bag, a synthetic resin film as a constituent material was laminated on a base film made of a biaxially stretched polyethylene terephthalate film, and a laminated film (Nakamoto Packs ( While changing to HS-PET), the fusing conditions were changed as follows.
<Fusing conditions>
-Blade temperature: 360 ° C
・ Blade angle: 60 °
・ Fusing rate: 100 pieces / minute (time per shot: 0.5 seconds)
そして、それ以外は、実施例１と同様にして実施例４の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定するとともに、収納袋の製造に用いたラミネートフィルムの長手方向の引張弾性率を上記した方法によって測定した。実施例４の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Otherwise, the storage bag of Example 4 was produced in the same manner as in Example 1, and the freshness retention characteristics of the storage bag were evaluated by the same method as in Example 1. Moreover, while measuring the width | variety and thickness of the heat seal part of the left side of the obtained storage bag by the above-mentioned method, the tensile elasticity modulus of the longitudinal direction of the laminate film used for manufacture of a storage bag was measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Example 4 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例５］
収納袋を作製する際に、構成材料である合成樹脂フィルムを、ポリエチレンとポリプロピレンとを共押し出ししてなる総厚さ２５μｍの未延伸フィルム（サン・トックス(株)製 ＹＪ０２）に変更するとともに、溶断条件を、以下のように変更した。
＜溶断条件＞
・刃先の温度：３００℃
・刃先の角度：６０°
・溶断速度：１００個／分（１ショット当たりの時間：０．５秒）
[Example 5]
When producing a storage bag, the synthetic resin film as a constituent material is changed to an unstretched film (YJ02 manufactured by Sun Tox Co., Ltd.) having a total thickness of 25 μm formed by co-extrusion of polyethylene and polypropylene, The fusing conditions were changed as follows.
<Fusing conditions>
-Blade temperature: 300 ° C
・ Blade angle: 60 °
・ Fusing rate: 100 pieces / minute (time per shot: 0.5 seconds)
そして、それ以外は、実施例１と同様にして実施例５の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定するとともに、収納袋の製造に用いた未延伸フィルムの長手方向の引張弾性率を上記した方法によって測定した。実施例５の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Otherwise, the storage bag of Example 5 was produced in the same manner as in Example 1, and the freshness retention characteristics of the storage bag were evaluated by the same method as in Example 1. Moreover, while measuring the width | variety and thickness of the heat seal part of the left side of the obtained storage bag by the above-mentioned method, the tensile elasticity modulus of the longitudinal direction of the unstretched film used for manufacture of a storage bag was measured by the above-mentioned method. . The evaluation results of the freshness retention characteristics of the storage bag of Example 5 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例６］
収納袋を作製する際の溶断条件を、以下のように変更した以外は、実施例１と同様にして実施例６の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。
＜溶断条件＞
・刃先の温度：４２０℃
・刃先の角度：９０°
・溶断速度：１２０個／分（１ショット当たりの時間：０．４秒）
[Example 6]
A storage bag of Example 6 was prepared in the same manner as in Example 1 except that the fusing conditions at the time of preparing the storage bag were changed as follows, and the freshness of the storage bag was obtained in the same manner as in Example 1. Retention characteristics were evaluated.
<Fusing conditions>
-Blade temperature: 420 ° C
・ Blade angle: 90 °
・ Fusing speed: 120 pieces / minute (time per shot: 0.4 seconds)
また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。実施例６の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Moreover, the width | variety and thickness of the heat seal part of the left side of the obtained storage bag were measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Example 6 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例７］
収納袋を作製する際の溶断条件を、以下のように変更した以外は、実施例１と同様にして実施例７の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。
＜溶断条件＞
・刃先の温度：４２０℃
・刃先の角度：１２０°
・溶断速度：１００個／分（１ショット当たりの時間：０．５秒）
[Example 7]
A storage bag of Example 7 was prepared in the same manner as in Example 1 except that the fusing conditions for preparing the storage bag were changed as follows, and the freshness of the storage bag was obtained in the same manner as in Example 1. Retention characteristics were evaluated.
<Fusing conditions>
-Blade temperature: 420 ° C
・ Blade angle: 120 °
・ Fusing rate: 100 pieces / minute (time per shot: 0.5 seconds)
また、得られた収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。実施例７の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Moreover, the width | variety and thickness of the heat seal part of the left side of the obtained storage bag were measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Example 7 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例８］
実施例１と同様な方法によって作成した二方袋（袋本体）の熱シール部分の上に、４．０ｍｍφの半円形の透過孔（パンチ孔）を穿設することによって、実施例８の収納袋を作製した。図３は、実施例８の収納袋を示したものである。収納袋Ｐ２は、ＯＰＰフィルムによって形成された正面視矩形状の二方袋であり、左右の両端縁が溶断シールされている。そして、左側の溶断シール部分（熱シール部分）に、４．０ｍｍφの半円形の１個の透過孔Ｈが穿設されている（透過孔Ｈの面積＝約６．２８ｍｍ２）。
[Example 8]
The accommodation of Example 8 is performed by drilling a 4.0 mmφ semicircular transmission hole (punch hole) on the heat seal portion of the two-sided bag (bag body) produced by the same method as Example 1. A bag was made. FIG. 3 shows a storage bag of Example 8. Storage bag P 2 is a front view rectangular two-sided bag which is formed by the OPP film, right and left end edges are fused seal. Then, one 4.0 mmφ semicircular permeation hole H is formed in the fusing seal part (heat seal part) on the left side (area of the permeation hole H = about 6.28 mm 2 ).
そして、その実施例８の収納袋（大型のものおよび小型のもの）を用いて、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。実施例８の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 And the freshness retention characteristic of the storage bag was evaluated by the same method as in Example 1 using the storage bag of Example 8 (large and small). The evaluation results of the freshness retention characteristics of the storage bag of Example 8 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例９］
実施例１と同様な方法によって作成した二方袋（袋本体）の左側の下端の隅部（熱シール部分と下端縁とが交差する部分）に、熱シール部分および下端縁からの各距離がいずれも所定の距離（１．０ｍｍ）になるように三角形状にヒートシール（約１２０℃）を施した。しかる後、その二方袋の左下端の隅部を、上記した三角形状のヒートシール部分の先端を含めて約４５°の傾斜状に裁断することによって、ヒートシール部分の外側（左側）および下側に、それぞれ、２つの透過孔を形成することによって、実施例９の収納袋を作製した。図４は、実施例９の収納袋を示したものである。収納袋Ｐ３は、ＯＰＰフィルムによって形成された正面視矩形状の二方袋であり、左右の両端縁が溶断シールされている。そして、左下端の隅部（熱シール部分と下端縁とが交差する部分）に、略台形状のポイントシール部分Ｓが設けられており、そのポイントシール部分Ｓの外側（左側）および下側に、それぞれ、所定の開口面積（約０．６３ｍｍ２）の２つの透過孔Ｈ１，Ｈ２が形成されている。
[Example 9]
Each distance from the heat seal portion and the lower end edge is at the lower left corner of the two-sided bag (bag body) created by the same method as in Example 1 (the portion where the heat seal portion and the lower end edge intersect). In either case, heat sealing (about 120 ° C.) was performed in a triangular shape so as to be a predetermined distance (1.0 mm). After that, the corner of the lower left corner of the two-sided bag is cut into an inclined shape of about 45 ° including the tip of the triangular heat seal portion described above, so that the outside (left side) and the bottom of the heat seal portion are cut. The storage bag of Example 9 was produced by forming two transmission holes on each side. FIG. 4 shows a storage bag of Example 9. Storage bag P 3 is a front view rectangular two-sided bag which is formed by the OPP film, right and left end edges are fused seal. A substantially trapezoidal point seal portion S is provided at a corner portion of the lower left end (a portion where the heat seal portion and the lower end edge intersect), on the outer side (left side) and lower side of the point seal portion S. , Two transmission holes H 1 and H 2 each having a predetermined opening area (about 0.63 mm 2 ) are formed.
そして、その実施例９の収納袋（大型のもの、および小型のもの）を用いて、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。実施例９の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 And the freshness retention characteristic of a storage bag was evaluated by the method similar to Example 1 using the storage bag of the Example 9 (a large thing and a small thing). The evaluation results of the freshness retention characteristics of the storage bag of Example 9 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例１０］
透過孔（パンチ孔）を穿設する位置を、二方袋（袋本体）の熱シール部分から約４５．０ｍｍ内側の部分に変更した以外は、実施例１と同様にして実施例１０の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。実施例１０の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。
[Example 10]
The storage of Example 10 is the same as Example 1 except that the position where the perforation hole (punch hole) is drilled is changed from the heat-sealed part of the two-sided bag (bag body) to the inner part of about 45.0 mm. A bag was prepared, and the freshness retention property of the storage bag was evaluated by the same method as in Example 1. The evaluation results of the freshness retention characteristics of the storage bag of Example 10 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例１１］
二方袋（袋本体）に穿設する透過孔（パンチ孔）を１０．０ｍｍφの円形のものに変更した以外は、実施例１と同様にして実施例１１の収納袋を作製し、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した（透過孔Ｈの面積＝約７８．５ｍｍ２）。実施例１１の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。
[Example 11]
A storage bag of Example 11 was produced in the same manner as in Example 1 except that the perforation hole (punch hole) drilled in the two-sided bag (bag body) was changed to a circular one with a diameter of 10.0 mmφ. 1 was used to evaluate the freshness retention characteristics of the storage bag (area of the permeation hole H = about 78.5 mm 2 ). The evaluation results of the freshness retention characteristics of the storage bag of Example 11 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［実施例１２］
実施例１と同様な方法によって作成した二方袋（袋本体）の熱シール部分から約８．０ｍｍ内側の部分に、１．０ｍｍφの円形の６つの透過孔（パンチ孔）を、図５の如く、上下に並べて穿設することによって（透過孔の中心が熱シール部分から１０ｍｍ内側になるように穿設することによって）、実施例１２の収納袋を得た（６個の透過孔Ｈ，Ｈ・・の合計面積＝約４．７１ｍｍ２）。そして、得られた収納袋を用いて、実施例１と同様な方法によって、収納袋の鮮度保持特性を評価した。実施例１２の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。
[Example 12]
Five circular transmission holes (punch holes) of 1.0 mmφ are formed in a portion approximately 8.0 mm inside from the heat seal portion of the two-sided bag (bag body) produced by the same method as in Example 1. Thus, the storage bag of Example 12 was obtained (by forming the six transmission holes H, 6) by drilling side by side vertically (by drilling so that the center of the transmission hole is 10 mm inside the heat seal portion). H..total area = approximately 4.71 mm 2 ). And the freshness retention characteristic of a storage bag was evaluated by the method similar to Example 1 using the obtained storage bag. The evaluation results of the freshness retention characteristics of the storage bag of Example 12 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［比較例１］
収納袋を作製する際の溶断条件を、以下のように変更した以外は、実施例１と同様にして比較例１の収納袋を作製した。そして、実施例１と同様な方法によって、比較例１の収納袋の鮮度保持特性を評価した。
＜溶断条件＞
・刃先の温度：４２０℃
・刃先の角度：１２０°
・溶断速度：６０個／分（１ショット当たりの時間：０．９秒）
[Comparative Example 1]
A storage bag of Comparative Example 1 was manufactured in the same manner as in Example 1 except that the fusing conditions at the time of manufacturing the storage bag were changed as follows. And the freshness retention characteristic of the storage bag of Comparative Example 1 was evaluated by the same method as in Example 1.
<Fusing conditions>
-Blade temperature: 420 ° C
・ Blade angle: 120 °
・ Fusing speed: 60 pieces / minute (time per shot: 0.9 seconds)
また、得られた比較例１の収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。比較例１の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Moreover, the width | variety and thickness of the heat seal part of the left side of the storage bag of the obtained comparative example 1 were measured by the above-mentioned method. Table 1 shows the evaluation results of the freshness retention characteristics of the storage bag of Comparative Example 1 together with the properties and manufacturing conditions of the storage bag.
［比較例２］
収納袋を作製する際の溶断条件を、以下のように変更した以外は、実施例２と同様にして比較例２の収納袋を作製した。そして、実施例１と同様な方法によって、比較例２の収納袋の鮮度保持特性を評価した。
＜溶断条件＞
・刃先の温度：３３０℃
・刃先の角度：９０°
・溶断速度：９０個／分（１ショット当たりの時間：０．７秒）
[Comparative Example 2]
A storage bag of Comparative Example 2 was manufactured in the same manner as in Example 2 except that the fusing conditions for manufacturing the storage bag were changed as follows. Then, the freshness retention characteristics of the storage bag of Comparative Example 2 were evaluated by the same method as in Example 1.
<Fusing conditions>
-Blade temperature: 330 ° C
・ Blade angle: 90 °
・ Fusing speed: 90 pieces / minute (time per shot: 0.7 seconds)
また、得られた比較例２の収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。比較例２の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Moreover, the width | variety and thickness of the heat seal part of the left side of the storage bag of the comparative example 2 which were obtained were measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Comparative Example 2 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
［比較例３］
収納袋を作製する際の溶断条件を、以下のように変更した以外は、実施例３と同様にして比較例３の収納袋を作製した。そして、実施例１と同様な方法によって、比較例３の収納袋の鮮度保持特性を評価した。
＜溶断条件＞
・刃先の温度：３７０℃
・刃先の角度：６０°
・溶断速度：１２０個／分（１ショット当たりの時間：０．４秒）
[Comparative Example 3]
A storage bag of Comparative Example 3 was manufactured in the same manner as in Example 3 except that the fusing conditions for manufacturing the storage bag were changed as follows. And the freshness retention characteristic of the storage bag of Comparative Example 3 was evaluated by the same method as in Example 1.
<Fusing conditions>
-Blade temperature: 370 ° C
・ Blade angle: 60 °
・ Fusing speed: 120 pieces / minute (time per shot: 0.4 seconds)
また、得られた比較例３の収納袋の左側の熱シール部分の幅および厚みを上記した方法によって測定した。比較例３の収納袋の鮮度保持特性の評価結果を収納袋の性状・製造条件とともに表１に示す。 Moreover, the width | variety and thickness of the heat seal part of the left side of the storage bag of the comparative example 3 which were obtained were measured by the above-mentioned method. The evaluation results of the freshness retention characteristics of the storage bag of Comparative Example 3 are shown in Table 1 together with the properties and manufacturing conditions of the storage bag.
表１から、熱シール部分の形状が本発明の要件を満たした実施例１〜１２の収納袋は、いずれも、枝豆を収納した場合およびブロッコリーを収納した場合の鮮度保持機能が良好であることが分かる。これに対して、熱シール部分の形状が本発明の要件を満たさない比較例１〜３の収納袋は、いずれも、枝豆を収納した場合およびブロッコリーを収納した場合の鮮度保持機能が不良であることが分かる。 From Table 1, each of the storage bags of Examples 1 to 12 in which the shape of the heat seal portion satisfies the requirements of the present invention has a good freshness maintaining function when storing green soybeans and when storing broccoli. I understand. On the other hand, the storage bags of Comparative Examples 1 to 3 in which the shape of the heat seal portion does not satisfy the requirements of the present invention have poor freshness maintaining functions when the green beans are stored and when the broccoli is stored. I understand that.
本発明に係る収納袋は、上記の如く優れた効果を奏するものであるため、特に、枝豆やブロッコリー等の青果物の鮮度保持用の収納袋として好適に用いることができる。 Since the storage bag according to the present invention exhibits excellent effects as described above, it can be suitably used as a storage bag for maintaining freshness of fruits and vegetables such as green soybeans and broccoli.
Ｐ１〜Ｐ３・・収納袋
Ｍ・・熱シール部分
Ｈ，Ｈ１，Ｈ２・・透過孔
Ｓ・・ポイントシール部分
P 1 to P 3 ··· Storage bag M · · Heat seal part H, H 1 and H 2 · · Permeation hole S · · Point seal
Claims (5)
少なくとも左右のいずれかの端縁が熱シールされており、
その熱シール部分の最大厚みが、熱シール部分の幅の５５％以上１００％未満であるとともに、
熱シールされた端縁から５０ｍｍの距離の範囲内に、気体を透過させるための少なくとも１つの透過孔が穿設されており、かつ、
前記合成樹脂フィルムが、二軸延伸ポリプロピレンフィルム、ポリエチレンテレフタレートフィルム、あるいはポリ乳酸フィルムであることを特徴する青果物の鮮度保持用収納袋。 A storage bag for maintaining freshness of fruits and vegetables formed of a synthetic resin film,
At least one of the left and right edges is heat sealed,
The maximum thickness of the heat seal portion is 55% or more and less than 100% of the width of the heat seal portion,
At least one permeation hole for allowing gas to permeate within a distance of 50 mm from the heat-sealed edge; and
A storage bag for maintaining freshness of fruits and vegetables, wherein the synthetic resin film is a biaxially stretched polypropylene film, a polyethylene terephthalate film, or a polylactic acid film .
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| JP5901035B1 (en) * | 2014-11-07 | 2016-04-06 | 株式会社ベルグリーンワイズ | Food storage bags |
| JP2016113172A (en) * | 2014-12-15 | 2016-06-23 | 住友ベークライト株式会社 | Food packaging sheet, food packaging bag, and food package |
| JP6786843B2 (en) * | 2016-03-31 | 2020-11-18 | 住友ベークライト株式会社 | Freshness-preserving packaging bag for root vegetables, packaging with root vegetables, how to prevent germination of root vegetables and how to prevent discoloration of root vegetables |
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| JP2021046260A (en) * | 2018-11-30 | 2021-03-25 | 株式会社ベルグリーンワイズ | Freshness-keeping storage bag for fruit and vegetable |
| JP2021046259A (en) * | 2018-11-30 | 2021-03-25 | 株式会社ベルグリーンワイズ | Freshness-keeping storage bag for fruit and vegetable |
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