JP5499505B2 - Freeze vacuum drying packaging bag and freeze vacuum drying method using freeze vacuum drying packaging bag - Google Patents
Freeze vacuum drying packaging bag and freeze vacuum drying method using freeze vacuum drying packaging bag Download PDFInfo
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- 238000001291 vacuum drying Methods 0.000 title claims description 54
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- 238000004108 freeze drying Methods 0.000 claims description 23
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Landscapes
- Tea And Coffee (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Bag Frames (AREA)
- Packages (AREA)
- Drying Of Solid Materials (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
Description
本発明は、凍結真空乾燥用の包装袋及びその包装袋を用いた凍結真空乾燥方法に関するものである。 The present invention relates to a packaging bag for freeze vacuum drying and a freeze vacuum drying method using the packaging bag.
凍結真空乾燥は、カップ麺や即席みそ汁の具材、お菓子に混ぜる原料、薬品の固形化、粉末化に使用されている。
凍結真空乾燥前の色、原形をほとんど損なわないで、しかも復元性のよい乾燥食品を得る為の方法として、凍結真空乾燥が知られている。凍結真空乾燥は、例えば、対象物をまず、アルミニウムやステンレスなど熱伝導率の高い広口のトレーなどに入れ、−３０〜−４０℃で凍結させ、その後、真空下で必要な熱量を供給しつつ氷の昇華によって一次乾燥、二次乾燥、場合によっては三次乾燥を行っている。真空乾燥処理では、対象物が大気圧から真空になる最中あるいは真空から大気圧に戻る際の風圧で飛散し、内容量が減ってしまい歩留まりが悪かったたり、別のトレーから組成の異なる対象物が混入するため真空乾燥機内に同じ組成の対象物しか入れられず稼働率が悪かったり、真空乾燥機内の壁などが飛散物で汚染される、対象物を入れたトレーが入出庫する際に真空乾燥機内の棚とトレーが接触して双方の金属が磨耗して削られ、その金属粉が真空乾燥処理中に飛散して食品などに混入するなどの問題があった。
Freeze-vacuum drying is used for cup noodles, instant miso soup ingredients, raw materials to be mixed in confectionery, solidification of chemicals, and powdering.
Freeze-vacuum drying is known as a method for obtaining a dried food that has almost no loss of color and original shape before freeze-drying and has good restorability. In freeze-drying, for example, an object is first placed in a wide-mouthed tray having high thermal conductivity such as aluminum or stainless steel, frozen at -30 to -40 ° C, and then a necessary amount of heat is supplied under vacuum. Primary drying, secondary drying, and in some cases tertiary drying are performed by sublimation of ice. In the vacuum drying process, the target is scattered from the atmospheric pressure to the vacuum or the wind pressure when returning from the vacuum to the atmospheric pressure, the internal volume is reduced, the yield is poor, or the target is a different composition from another tray When an object with the same composition is put into the vacuum dryer and the operation rate is poor, or the wall inside the vacuum dryer is contaminated with flying objects, the tray containing the object enters and exits. There was a problem that the shelf and the tray in the vacuum dryer were in contact with each other, and both metals were worn and scraped, and the metal powder was scattered during the vacuum drying process and mixed into food.
従って、真空乾燥させる際、広口トレーなどの口をフィルムで覆い、フィルムを部分的にトレーなどの外側面に粘着テープで固定するなどの方法が取られているが、粘着テープの無い箇所から対象物が飛散するという問題がある。また、飛散を抑えるためにフィルムを粘着テープで固定する箇所を多くしても、微小な乾燥物が隙間から飛散するという事態が発生する。当然のことながらトレーをフィルムで完全に密封して処理すると真空時にフィルムが破損するなどの問題が生じる。 Therefore, when vacuum-drying, a method such as covering the mouth of a wide-mouthed tray with a film and partially fixing the film to the outer surface of the tray or the like with an adhesive tape is taken. There is a problem that things are scattered. Further, even if the number of places where the film is fixed with the adhesive tape in order to suppress the scattering, a situation in which a minute dry matter is scattered from the gap occurs. As a matter of course, when the tray is completely sealed with a film and processed, problems such as film breakage occur in a vacuum.
特開２００８−１７４５０５号公報は、化学的溶液を毛管力により保持可能な程度の貫通孔を有するプレートを用いて、化学的溶液を保持した後、低温冷媒に接触させて、凍らせた後、貫通孔内の凍結した化学的溶液を取り出して凍結乾燥を行う凍結乾燥物の製造方法であり、前記プレートに０．５〜５ｍｍの貫通孔を設けて化学的溶液を保持しているが、試薬などを定量的に製造する方法であるため、専用の冶具が必要であり、凍結真空乾燥に時間を要し、また採取できる量が少ないという問題であった。 Japanese Patent Application Laid-Open No. 2008-174505 uses a plate having a through-hole capable of holding a chemical solution by capillary force, and after holding the chemical solution, bringing it into contact with a low-temperature refrigerant and freezing, A method for producing a freeze-dried product in which a frozen chemical solution in a through-hole is taken out and freeze-dried, and the chemical solution is retained by providing a 0.5 to 5 mm through-hole in the plate. This is a method for quantitatively manufacturing the above, and therefore, a dedicated jig is required, and it takes time for freeze-drying, and the amount that can be collected is small.
凍結真空乾燥において、真空乾燥を行っても対象物が飛散せず、真空乾燥機内に異種のものを共存させて真空乾燥処理を行っても異物が混入せず、真空乾燥機を汚染することのない凍結真空乾燥用包装袋及び当該包装袋を用いた凍結真空乾燥方法を提供する。 In freeze vacuum drying, even if vacuum drying is performed, the object does not scatter, and even if different types of substances are present in the vacuum dryer, foreign objects do not enter and contaminate the vacuum dryer. There are provided a packaging bag for freeze-drying and a freeze-drying method using the packaging bag.
本発明は、凍結真空乾燥処理される際に被凍結真空乾燥物を包装する包装袋であり、前記包装袋の平均孔径が１０μｍ〜３ｍｍ、かつ開孔面積比率が２×１０−６〜８×１０−２％である凍結真空乾燥用包装袋である。
更に好ましい形態としては、前記包装袋の材質が高分子フィルムであり、前記包装袋のシール強度が１８Ｎ／１５ｍｍ以上であり、前記高分子フィルムの引張強度の伸びが４５％以上であり、前記包装袋の孔径が、３０〜８００μｍである凍結真空乾燥用包装袋である。
また、上記のいずれかに記載の凍結真空乾燥用包装袋を用いて凍結した被凍結真空乾燥物を包装し、その後真空乾燥処理を行う凍結真空乾燥方法であり、上記のいずれかに記載の凍結真空乾燥用包装袋を用いて凍結前の被凍結真空乾燥物を包装し、その後凍結処理及び真空乾燥処理を行う凍結真空乾燥方法である。
The present invention is a packaging bag for packaging a freeze-dried material to be frozen when freeze-drying, wherein the packaging bag has an average pore diameter of 10 μm to 3 mm and an open area ratio of 2 × 10 −6 to 8 ×. It is a packaging bag for freeze vacuum drying which is 10-2 %.
As a more preferred embodiment, the packaging bag is made of a polymer film, the packaging bag has a sealing strength of 18 N / 15 mm or more, and the elongation of the tensile strength of the polymer film is 45% or more. The bag has a pore size of 30 to 800 μm and is a packaging bag for freeze vacuum drying.
Further, the freeze-drying method according to any one of the above, wherein the freeze-dried product to be frozen is packaged using the packaging bag for freeze-drying according to any one of the above, followed by a vacuum-drying process. This is a freeze-drying method in which a vacuum-dried material to be frozen before freezing is packaged using a vacuum-drying packaging bag, followed by a freezing process and a vacuum-drying process.
本発明の凍結真空乾燥用の包装袋を用いると、真空乾燥機内にて処理した際の他食品からの異物の混入が無いため、異なる内容物と同じバッチで真空乾燥処理でき、短時間で処理が可能となり稼働率のアップにつながり、また、金属粉などの混入がない安全な乾燥食品を入手することができ、コストダウンが実現できる包装袋である。また、真空乾燥機内に飛散物が付着することもないので、機内を清掃する回数が非常に少なくても良い。 When the packaging bag for freeze-drying according to the present invention is used, there is no contamination of foreign substances from other foods when processing in a vacuum dryer, so vacuum drying can be performed in the same batch with different contents, and processing can be performed in a short time. This is a packaging bag that can increase the operating rate, and can obtain a safe dry food that is free of metal powder or the like and can reduce the cost. In addition, since the scattered matter does not adhere to the vacuum dryer, the number of times of cleaning the inside of the machine may be very small.
本発明の凍結真空乾燥用包装袋に使用される対象物は、主に食品であるが、これに限定されるものではなく、凍結させた対象物を真空乾燥させて乾燥させる。具体的に凍結真空乾燥処理される対象物、つまり被凍結真空乾燥物としては、例えば、野菜、果物、卵、肉、魚、コーヒー、砂糖、味噌、麺などの食品や調味料、ビタミン剤、抗生物質などの医薬品、細菌、酵母、ウィルスなどの微生物、化粧品、などを挙げることができる。本発明の包装袋が効果を発揮しやすいものとしては、水や有機溶液などの液体に溶かされた液状物質で、乾燥後の状態が粉末になるものであるが、例えば、カットされたネギのような水分を含む小片物でも使用可能である。 Although the target object used for the packaging bag for freeze vacuum drying of this invention is mainly foodstuffs, it is not limited to this, The frozen target object is vacuum-dried and dried. Specifically, the object to be freeze-dried, that is, the freeze-dried vacuum-dried product, for example, foods such as vegetables, fruits, eggs, meat, fish, coffee, sugar, miso, noodles, seasonings, vitamins, Examples include pharmaceuticals such as antibiotics, microorganisms such as bacteria, yeast and viruses, and cosmetics. The packaging bag of the present invention is likely to exert its effect as a liquid substance dissolved in a liquid such as water or an organic solution, and the dried state becomes a powder. Small pieces containing such moisture can also be used.
本発明に用いられる凍結真空乾燥用包装袋には、微小な貫通の孔があいている。
包装袋に設けられた貫通孔の孔径は、１０μｍ〜３ｍｍが好ましい。孔径が１０μｍより小さいと被凍結真空乾燥物の粉末が孔に付着したり、固形成分を含んだ蒸気が孔に付着し固形成分が結晶化して層を形成したりして孔を塞ぐ危険性があり、その結果、真空中にて袋が破裂する可能性がある。孔径が３ｍｍより大きいと真空処理中に内容物が飛び出たり、真空から大気圧に戻す際に異物が入りやすくなる。より好ましくは３０〜８００μｍであり、更に好ましくは３０〜５００μｍである。
The packaging bag for freeze-drying used in the present invention has minute through holes.
As for the hole diameter of the through-hole provided in the packaging bag, 10 micrometers-3 mm are preferable. If the pore size is smaller than 10 μm, there is a risk that the freeze-dried vacuum powder adheres to the pores, or vapor containing solid components adheres to the pores and the solid components crystallize to form a layer, thereby closing the pores. As a result, the bag may burst in a vacuum. If the hole diameter is larger than 3 mm, the contents will pop out during the vacuum processing, or foreign matter will easily enter when returning from the vacuum to the atmospheric pressure. More preferably, it is 30-800 micrometers, More preferably, it is 30-500 micrometers.
包装袋の貫通孔の形状は、円形、楕円形、四角または三角形など、どのような形状であっても良く、また混在してもよい。
貫通孔の穿孔方法は、特に限定されないが、例えば機械的に抜き刃で打ち抜く方法、加熱した針により開ける方法、微細で鋭利な突起物を有するロールとゴムロールでフィルムを挟み込む方法、レーザー光による方法などが知られており、これらの中から最適な方法を選択できる。穿孔は、フィルム成型直後、スリット時、印刷前、印刷中、印刷後、製袋直前、製袋中、製袋後などいかなるタイミングでも構わない。適切な加工を行い、機能を損なわなければ構わない。
The shape of the through-hole of the packaging bag may be any shape such as a circle, an ellipse, a square or a triangle, and may be mixed.
The method for punching through holes is not particularly limited. For example, a method of mechanically punching with a punching blade, a method of opening with a heated needle, a method of sandwiching a film between a roll having a fine and sharp protrusion and a rubber roll, a method using laser light Etc. are known, and the most suitable method can be selected from these. Perforation may be performed at any timing such as immediately after film formation, at the time of slitting, before printing, during printing, after printing, immediately before bag making, during bag making, after bag making. It does not matter if proper processing is performed and the function is not impaired.
本発明の凍結真空乾燥用包装袋の貫通孔の開孔面積比率は、２×１０−６〜８×１０−２％である。包装袋の有効面積に占める孔の総面積を表したものであり、包装袋の有効面積とは、包装袋のシール部分などを除いた寸法いわゆる内寸から求められる。
孔の位置については、特に定めないが、真空中に孔を塞がないように、袋の上側に配置されていることが好ましい。
開孔面積比率が２×１０−６％未満では、水蒸気の透過性が悪く真空乾燥に長時間を要する。開孔面積比率が８×１０−２％を超えると、開孔面積が大きすぎるため異物の混入などの恐れがある。
The opening area ratio of the through holes of the packaging bag for freeze-drying according to the present invention is 2 × 10 −6 to 8 × 10 −2 %. This represents the total area of the holes occupying the effective area of the packaging bag, and the effective area of the packaging bag is determined from the so-called internal dimension excluding the sealing portion of the packaging bag.
The position of the hole is not particularly defined, but it is preferably arranged on the upper side of the bag so as not to block the hole in the vacuum.
When the aperture area ratio is less than 2 × 10 −6 %, the water vapor permeability is poor and a long time is required for vacuum drying. If the aperture area ratio exceeds 8 × 10 −2 %, the aperture area is too large, and foreign matter may be mixed.
本発明の凍結真空乾燥用包装袋は高分子フィルムが用いられ、包装袋のシール部のシール強度は、特に限定されないが、好ましくは１８Ｎ／１５ｍｍ以上が良い。シール強度が１８Ｎ／１５ｍｍ未満ではシール強度が不足し、真空中においてシール部分で破裂し、内容物が飛散する可能性がある。また、シール強度は、８０Ｎ／１５ｍｍ以下であることが好ましい。これ以上の強度は不要はである。
シール強度の測定方法は、ＪＩＳ Ｚ ０２３８に準じている。
The packaging bag for freeze vacuum drying of the present invention uses a polymer film, and the sealing strength of the sealing portion of the packaging bag is not particularly limited, but is preferably 18 N / 15 mm or more. If the seal strength is less than 18 N / 15 mm, the seal strength is insufficient, and there is a possibility of bursting at the seal portion in vacuum and scattering the contents. The seal strength is preferably 80 N / 15 mm or less. No further strength is required.
The measuring method of seal strength is based on JIS Z 0238.
本発明の包装袋は高分子フィルムが用いられ、高分子フィルムの引張強度の伸びは、４５％以上が好ましい。伸びが４５％未満では強度が不足し、真空中ではフィルムのシール以外の部分で破断し、やはり内容物が飛散する可能性がある。また、伸びは、１５００％以下であることが好ましい。これ以上の伸びは、強度が弱くなり使用できない恐れがある。
引張強度の伸びの測定方法は、ＪＩＳ Ｋ ７１２７に準じている。
The packaging bag of the present invention uses a polymer film, and the elongation of the tensile strength of the polymer film is preferably 45% or more. If the elongation is less than 45%, the strength is insufficient, and in a vacuum, the film may break at a portion other than the seal of the film, and the contents may be scattered. Further, the elongation is preferably 1500% or less. If the elongation is more than this, the strength is weakened and there is a possibility that it cannot be used.
The measuring method of elongation of tensile strength is based on JIS K7127.
本発明に用いる高分子フィルムとしては、シール性のある材質なら特に限定されない。
例えば、延伸ポリプロピレン、未延伸ポリプロピレンなどのオレフィン系樹脂、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリカーボネート、ポリ乳酸などの各種ポリエステル系樹脂、ポリ塩化ビニリデンでコーティング、低密度ポリエチレン、高密度ポリエチレン、直鎖状低密度ポリエチレン、メタロセン系ポリエチレンなどの各種ポリエチレン、ポリスチレン、エチレンー酢酸ビニル共重合体、ポリ乳酸などの生分解性樹脂、ポリ塩化ビニル、ポリビニルアルコール、ポリイミドされた６ナイロンやＭＸＤなどの各種ポリアミド系樹脂が上げられ、単層、複層でも構わない。
The polymer film used in the present invention is not particularly limited as long as it has a sealing property.
For example, olefin resins such as stretched polypropylene and unstretched polypropylene, various polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polylactic acid, coating with polyvinylidene chloride, low density polyethylene, high density polyethylene, linear low Various polyethylenes such as density polyethylene and metallocene polyethylene, polystyrene, ethylene-vinyl acetate copolymer, biodegradable resins such as polylactic acid, polyvinyl chloride, polyvinyl alcohol, polyimide-based 6 nylon and MXD and other polyamide resins It may be a single layer or multiple layers.
凍結真空乾燥処理される対象物が液状物で水分量が多い場合、対象物の凍結した水分が真空中において昇華する際の気体の体積は個体の数千倍以上の体積になるため包装袋が限界まで膨らんだときに破裂する可能性があり、例えば、最外層としてポリエチレンテレフタレートなどのポリエステル系樹脂またはナイロンなどのポリアミド系樹脂に、内層として、ポリエチレンやエチレン−酢酸ビニル共重合体の単層または複層をラミネートした材質が好ましい。 When the object to be freeze-dried and dried is liquid and has a large amount of moisture, the volume of gas when the frozen water of the object is sublimated in a vacuum is more than several thousand times that of an individual. There is a possibility of rupture when swelled to the limit, for example, a polyester resin such as polyethylene terephthalate or a polyamide resin such as nylon as the outermost layer, a single layer of polyethylene or ethylene-vinyl acetate copolymer as the inner layer or A material in which multiple layers are laminated is preferable.
本発明に用いられる高分子フィルムの製作方法としては、特に限定されず、例えば、ドライラミネーションや共押出し、押出ラミネーションなどの公知の手段によって行われる。
フィルムを製造するにあたり種々の添加物を混錬しても、またフィルム化後に延伸や熱処理を行ってもまったく差し支えない。フィルム化後にコーティング、蒸着などを行っても構わない。フィルムの一層に金属箔、金属蒸着膜、又は無機蒸着膜があっても構わない。
多層フィルムは、透明であっても、添加物を混入させて不透明であっても使用することができ、印刷を施したものであっても構わない。またこれらのフィルムと不織布などとの複合の素材でも良い。
The production method of the polymer film used in the present invention is not particularly limited, and for example, it is performed by a known means such as dry lamination, co-extrusion, or extrusion lamination.
In manufacturing the film, various additives may be kneaded, or stretching or heat treatment may be performed after film formation. You may perform coating, vapor deposition, etc. after film formation. There may be a metal foil, a metal vapor deposition film, or an inorganic vapor deposition film on one layer of the film.
The multilayer film can be used even if it is transparent or mixed with an additive to be opaque, and may be printed. Moreover, the composite material of these films and a nonwoven fabric etc. may be sufficient.
本発明の凍結真空乾燥用包装袋を製作する場合、どのような袋形状に加工しても構わない。三方シール袋、二方シール袋、合掌背貼り袋、溶断シール袋、横ガゼット袋、底ガゼット袋、自立袋などの袋でも良く、円形、楕円形、球状、直方体、三角形、ドーナツ状、半円状、三日月状など任意の形でも構わない。 When producing the packaging bag for freeze-drying according to the present invention, it may be processed into any bag shape. Bags such as three-sided seal bags, two-sided seal bags, spliced back bags, fusing sealed bags, side gusset bags, bottom gusset bags, and free-standing bags can be used. The shape may be any shape such as a crescent shape.
本発明の凍結真空乾燥用包装袋は、被凍結真空乾燥物の真空乾燥処理において用いられる。凍結真空乾燥は、例えば、大きく分けて、凍結真空乾燥される対象物を凍結する工程と真空乾燥する工程とに分けることができる。本発明の凍結真空乾燥用包装袋は、凍結した当該対象物を真空乾燥する工程に用いられる包装袋であり、若しくは、当該対象物を凍結する工程と真空乾燥する工程の両方に用いられる凍結真空乾燥用包装袋である。 The packaging bag for freeze-drying of this invention is used in the vacuum-drying process of the freeze-dried thing to be frozen. Freeze-vacuum drying can be roughly divided into, for example, a step of freezing an object to be freeze-vacuum dried and a step of vacuum drying. The packaging bag for freeze vacuum drying of the present invention is a packaging bag used in a step of vacuum drying the frozen object, or a freezing vacuum used in both a step of freezing the object and a step of vacuum drying. It is a packaging bag for drying.
凍結真空乾燥では、先ずは被凍結真空乾燥物が凍結される。凍結を早めるために、例えば、被凍結真空乾燥物は金属製のトレーなどに入れられ凍結処理される。被凍結真空乾燥物が凍結すると凍結物を本発明の包装袋に入れ、包装袋の口を閉じ、真空乾燥処理される。真空乾燥処理時では、被凍結真空乾燥物を含む包装袋を熱伝導性の良い金属製のトレーに入れても良いが、それに限定はされない。真空乾燥処理が終了すると当該包装袋より取り出して製品となるが、以降の製品の取り扱いは公知の方法を用いることができる。なお、凍結時には孔のない包装袋に入れ、真空乾燥時に本発明の包装袋に入れて処理しても良い。 In freeze-drying, first, the vacuum-dried product to be frozen is frozen. In order to accelerate freezing, for example, the freeze-dried material to be frozen is placed in a metal tray or the like and subjected to freezing treatment. When the freeze-dried product to be frozen is frozen, the frozen product is placed in the packaging bag of the present invention, the mouth of the packaging bag is closed, and vacuum drying is performed. At the time of the vacuum drying process, the packaging bag containing the freeze-dried material to be frozen may be put in a metal tray having good thermal conductivity, but is not limited thereto. When the vacuum drying process is completed, the product is taken out from the packaging bag to become a product, and a known method can be used for subsequent handling of the product. In addition, you may put into the packaging bag without a hole at the time of freezing, and you may process in the packaging bag of this invention at the time of vacuum drying.
若しくは、被凍結真空乾燥物が凍結される前に本発明の凍結真空乾燥用包装袋に入れ、包装袋の口を閉じて凍結処理し、凍結処理が終了すると、前述と同様の真空乾燥処理を行っても良い。被凍結真空乾燥物が液状である場合、この方法が好ましい。例えば、広口の金属製トレーに被凍結真空乾燥物を入れ、トレーごと包装袋に入れて凍結処理を行う。被凍結真空乾燥物が凍結した後は、そのまま真空乾燥処理を行っても良く、また、包装袋から凍結した被凍結真空乾燥物を取り出し、別の本発明の包装袋に入れ替えて真空乾燥処理を行っても良い。 Alternatively, before the freeze-dried product to be frozen is frozen, it is put into the packaging bag for freeze-drying according to the present invention, the packaging bag is closed and the freezing process is completed. You can go. This method is preferable when the object to be frozen is liquid. For example, a vacuum-dried product to be frozen is placed in a wide-mouth metal tray, and the tray is placed in a packaging bag for freezing. After the freeze-dried product to be frozen is frozen, it may be vacuum-dried as it is, or the frozen product to be frozen is taken out of the packaging bag and replaced with another packaging bag of the present invention to perform the vacuum-drying treatment. You can go.
本発明の包装袋に対象物を入れ、包装袋の口を密封する方法としては、ヒートシール、バッグシール、輪ゴム留め、ジッパー留めが使用できる。包装袋の口をシールする際のシール強度としては、前述と同じように１８Ｎ／１５ｍｍ以上必要である。 As a method for putting an object in the packaging bag of the present invention and sealing the mouth of the packaging bag, heat sealing, bag sealing, rubber band fastening, and zipper fastening can be used. The sealing strength when sealing the mouth of the packaging bag is required to be 18 N / 15 mm or more as described above.
本発明の凍結真空乾燥方法は、本発明の凍結真空乾燥用包装袋を用いるものであり、真空乾燥処理において当該包装袋が用いられる方法であれば、それに限定されず、凍結処理において当該包装袋を用い、その後の真空乾燥処理においても当該包装袋を用いる方法も含まれる。
本発明の凍結真空乾燥方法では、公知の凍結真空乾燥機が用いられ、特に制限されるものではない。凍結機と真空乾燥機とが別々のものであっても良い。凍結真空乾燥機の大きさ、容量なども特に限定されない。また、凍結時の条件、真空乾燥時の条件も特に限定されず、通常の公知の条件を用いることができる。また、被凍結真空乾燥物の乾燥の判断も通常の公知の条件を当てはめることができる。
The freeze-vacuum drying method of the present invention uses the packaging bag for freeze-vacuum drying of the present invention, and is not limited to this as long as the packaging bag is used in the vacuum drying process. The method using the packaging bag is also included in the subsequent vacuum drying process.
In the freeze vacuum drying method of the present invention, a known freeze vacuum dryer is used and is not particularly limited. A freezer and a vacuum dryer may be separate. The size and capacity of the freeze vacuum dryer are not particularly limited. Moreover, the conditions at the time of freezing and the conditions at the time of vacuum drying are not specifically limited, Ordinary well-known conditions can be used. Moreover, the judgment of the drying of the to-be-frozen vacuum dried product can also apply normal well-known conditions.
本発明の凍結真空乾燥用包装袋に用いたフィルムの材質の特性は次のとおりである。
＜実施例１＞
アルミ製のトレー（サイズ：２４×３１×３．５ｃｍ）に、加熱調理した６ｍｍ角のみじん切りした小ネギを２００ｇ入れ、−４０℃の急速冷凍で凍結させた。フィルムＢに直径３０μｍの孔を１ｍ２当り２００個均一にあけた（開孔面積比率１．４１×１０−５％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、１時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２３時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例２＞
実施例１と同様に小ネギを加熱調理・凍結処理し、フィルムＤに直径３０μｍの孔を１ｍ２当り２００個均一にあけた（開孔面積比率１．４１×１０−５％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例３＞
実施例１と同様に小ネギを加熱調理・凍結処理し、フィルムＡに直径１８０μｍの孔を１ｍ２当り１０００個均一にあけた（開孔面積比率２．５４×１０−３％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、小ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、１時間かけて真空度１Torrまで真空乾燥し、二次乾燥以降は実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
<Example 1>
In an aluminum tray (size: 24 × 31 × 3.5 cm), 200 g of 6 mm square chopped heat-cooked leeks were put and frozen by rapid freezing at −40 ° C. In the film B, 200 holes having a diameter of 30 μm were uniformly formed per 1 m 2 (aperture area ratio 1.41 × 10 −5 %). A bag with an internal size of 30 × 35 cm was made from this film, and the tray on which the leeks were placed was inserted, and the opening of the bag was heat sealed. This was put into a vacuum dryer and vacuum-dried to a vacuum degree of 0.5 Torr over 1 hour. As secondary drying, it was heated with a heater at 30 ° C. for 23 hours while maintaining the vacuum degree. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 2>
Example 1 and cooked-freezing small leek Similarly, the pore diameter 30μm in film D was opened to 1 m 200 per 2 uniformly (opening area ratio 1.41 × 10 -5%). A bag with an internal size of 30 × 35 cm was made from this film, and the tray on which the leeks were placed was inserted, and the opening of the bag was heat sealed. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Example 3>
Small onions were cooked and frozen in the same manner as in Example 1, and 1000 holes with a diameter of 180 μm were uniformly formed in film A per 1 m 2 (opening area ratio 2.54 × 10 −3 %). A bag with an inner size of 30 × 35 cm was made from this film, and the tray on which small leeks were placed was inserted, and the opening of the bag was heat sealed. This is put into a vacuum dryer and dried in a vacuum to 1 Torr over 1 hour. After the secondary drying, vacuum drying is performed in the same manner as in Example 1. The bag is broken from the dryer and the contents are removed. The presence or absence of contamination, contamination and scattering was confirmed.
＜実施例４＞
実施例１と同様に小ネギを加熱調理・凍結処理し、フィルムＣに直径４００μｍの孔を１ｍ２当り２５００個均一にあけた（開孔面積比率３．１４×１０−２％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、小ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例５＞
実施例１と同様に小ネギを加熱調理・凍結処理し、フィルムＡに直径７００μｍの孔を１ｍ２当り１５００個均一にあけた（開孔面積比率５．７７×１０−２％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、小ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例６＞
実施例１と同様に小ネギを加熱調理・凍結処理し、フィルムＡに直径２ｍｍの孔を１ｍ２当り８０個均一にあけた（開孔面積比率２．５１×１０−２％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、小ネギを載せたトレーごと挿入して、袋の開口部をヒートシールした。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例７＞
加熱調理した３ｃｍ角のジャガイモを４００ｇ入れ、−４０℃の急速冷凍で凍結させた。実施例５と同様のフィルムから内寸３０×３５ｃｍの袋を作成し、ジャガイモをトレーを用いずに挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、１時間かけて真空度３Torrまで真空乾燥し、二次乾燥以降は実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入の有無、飛散を確認した。
<Example 4>
Small onions were cooked and frozen in the same manner as in Example 1, and 2500 holes having a diameter of 400 μm were uniformly formed in film C per 1 m 2 (aperture area ratio 3.14 × 10 −2 %). A bag with an inner size of 30 × 35 cm was made from this film, and the tray on which small leeks were placed was inserted, and the opening of the bag was heat-sealed. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Example 5>
Small onions were cooked and frozen in the same manner as in Example 1, and 1500 holes having a diameter of 700 μm were uniformly formed in the film A per 1 m 2 (aperture area ratio 5.77 × 10 −2 %). A bag with an inner size of 30 × 35 cm was made from this film, and the tray on which small leeks were placed was inserted, and the opening of the bag was heat-sealed. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Example 6>
Small onions were cooked and frozen in the same manner as in Example 1, and 80 holes with a diameter of 2 mm were uniformly formed in film A per 1 m 2 (aperture area ratio 2.51 × 10 −2 %). A bag with an inner size of 30 × 35 cm was made from this film, and the tray on which small leeks were placed was inserted, and the opening of the bag was heat-sealed. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Example 7>
400 g of cooked 3 cm square potatoes were added and frozen by rapid freezing at −40 ° C. A bag with an internal size of 30 × 35 cm was made from the same film as in Example 5, and potato was inserted without using a tray to heat-seal the opening of the bag. This is put into a vacuum dryer and dried in a vacuum to a vacuum degree of 3 Torr over 1 hour. After the secondary drying, vacuum drying is performed in the same manner as in Example 1. The dry state, the presence or absence of foreign matter, and scattering were confirmed.
＜比較例１＞
実施例１と同様に加熱調理・凍結処理した小ネギを、厚み５０μｍの低密度ポリエチレンフィルムを無孔のまま、３０×３５ｃｍにカットし、トレーの上に被せ４隅のみガムテープで部分的に留めて固定した。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜比較例２＞
実施例１と同様に加熱調理・凍結処理した小ネギを、フィルムＡに直径５ｍｍの孔を１ｍ２当り５０個均一にあけた（開孔面積比率９．８１×１０−２％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、ジャガイモを載せたトレーごと挿入して、袋の開口部をヒートシールした。実施例１と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜比較例３＞
実施例７と同様に加熱調理・凍結処理したジャガイモを、フィルムＡに直径３０ｍｍの孔を１ｍ２当り２０個均一にあけた（開孔面積比率１．４１％）。このフィルムから内寸３０×３５ｃｍの袋を作製し、ジャガイモを載せたトレーごと挿入してヒートシールした。実施例６と同様に真空乾燥を実施し、乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
<Comparative Example 1>
A small onion cooked and frozen in the same manner as in Example 1 was cut into 30 × 35 cm with a low-density polyethylene film having a thickness of 50 μm being non-porous and covered on a tray and partially fastened with gummed tape only at the four corners. Fixed. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Comparative example 2>
In the same manner as in Example 1, 50 small-sized leeks cooked and frozen were perforated uniformly in film A with a diameter of 5 mm per 1 m 2 (aperture area ratio 9.81 × 10 −2 %). A bag with an internal size of 30 × 35 cm was made from this film, and the tray with potatoes was inserted into the bag to heat-seal the opening of the bag. Vacuum drying was carried out in the same manner as in Example 1, and the bag was removed from the dryer, and the presence or absence of tearing of the bag, the dried state of the contents, foreign matter contamination, and scattering was confirmed.
<Comparative Example 3>
20 holes having a diameter of 30 mm were uniformly formed in film A per 1 m 2 of potato that had been cooked and frozen in the same manner as in Example 7 (aperture area ratio 1.41%). A bag with an internal size of 30 × 35 cm was produced from this film, and the tray with potatoes was inserted and heat sealed. Vacuum drying was performed in the same manner as in Example 6, and the bag was removed from the dryer, and the bag was torn, the contents were dried, foreign matter was mixed, and the presence or absence of scattering was confirmed.
＜実施例８＞
実施例１と同様のトレーに、熱湯で抽出し、その後水分を飛ばし３倍に濃縮したコーヒー液５００ｃｃと難消化性デキストリン１０ｇ混ぜて、−４０℃の急速冷凍で凍結させた。実施例１と同様のフィルムから内寸３０×３５ｃｍの袋を作成し、凍結させたコーヒー混合物をトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例９＞
実施例８と同様に抽出・混合・凍結したコーヒー混合物を、実施例３と同様のフィルムから内寸３０×３５ｃｍの袋を作成し、このコーヒー混合物をトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例１０＞
実施例８と同様に抽出・混合・凍結したコーヒー混合物を、実施例４と同様のフィルムから内寸３０×３５ｃｍの袋を作成し、このコーヒー混合物をトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例１１＞
実施例８と同様に抽出・混合・凍結したコーヒー混合物を、実施例５と同様のフィルムから内寸３０×３５ｃｍの袋を作成し、このコーヒー混合物をトレーごと挿入して、袋の開口部をヒートシールした。これを真空乾燥機に入れて、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
<Example 8>
The same tray as in Example 1 was extracted with hot water, and then 500 cc of coffee liquid concentrated to 3 times by removing water and 10 g of indigestible dextrin were mixed and frozen by rapid freezing at −40 ° C. A bag with an inner size of 30 × 35 cm was made from the same film as in Example 1, and the frozen coffee mixture was inserted along with the tray, and the opening of the bag was heat sealed. This was put into a vacuum dryer, vacuum dried to a vacuum degree of 0.5 Torr over 2 hours, and heated as a secondary drying for 22 hours with a heater at 30 ° C. while maintaining the vacuum degree. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 9>
The coffee mixture extracted, mixed and frozen in the same manner as in Example 8 was made into a 30 × 35 cm inner bag from the same film as in Example 3, and this coffee mixture was inserted together with the tray to open the opening of the bag. Heat sealed. This was put into a vacuum dryer, vacuum dried to a vacuum degree of 0.5 Torr over 2 hours, and heated as a secondary drying for 22 hours with a heater at 30 ° C. while maintaining the vacuum degree. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 10>
The coffee mixture extracted, mixed and frozen in the same manner as in Example 8 was made into a 30 × 35 cm inner bag from the same film as in Example 4, and this coffee mixture was inserted together with the tray to open the opening of the bag. Heat sealed. This was put into a vacuum dryer, vacuum dried to a vacuum degree of 0.5 Torr over 2 hours, and heated as a secondary drying for 22 hours with a heater at 30 ° C. while maintaining the vacuum degree. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 11>
The coffee mixture extracted, mixed and frozen in the same manner as in Example 8 was made into a bag with an inner size of 30 × 35 cm from the same film as in Example 5, and this coffee mixture was inserted together with the tray to open the opening of the bag. Heat sealed. This was put into a vacuum dryer, vacuum dried to a vacuum degree of 0.5 Torr over 2 hours, and heated as a secondary drying for 22 hours with a heater at 30 ° C. while maintaining the vacuum degree. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
＜比較例４＞
実施例８と同様に抽出・混合・凍結したコーヒー混合物を、比較例１と同様のフィルムで固定し、実施例８と同様に真空乾燥を実施し、１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜比較例５＞
実施例８と同様に抽出・混合・凍結したコーヒー混合物を、フィルムＡに直径５μｍの孔を１ｍ２当り５００個均一にあけた（開孔面積比率９．８１×１０−７％）。このフィルムから内寸３０×３５ｃｍの袋を作成し、コーヒー混合物をトレーごと挿入して、袋の開口部をヒートシールした。実施例４と同様に真空乾燥を実施し、１時間かけて大気圧に戻し乾燥機から出して袋の破れを確認した結果、袋が破裂し内容物が飛散していたため内容物の乾燥状態、異物混入、飛散の有無は確認できずに評価を中止した。
<Comparative Example 4>
The coffee mixture extracted, mixed and frozen in the same manner as in Example 8 was fixed with the same film as in Comparative Example 1, vacuum dried in the same manner as in Example 8, and returned to atmospheric pressure over 1 hour from the dryer. The bag was broken, the contents were dried, foreign matter was mixed, and the presence or absence of scattering was confirmed.
<Comparative Example 5>
500 holes having a diameter of 5 μm were uniformly formed in film A per 1 m 2 of the coffee mixture extracted, mixed and frozen in the same manner as in Example 8 (opening area ratio 9.81 × 10 −7 %). A bag with an internal size of 30 × 35 cm was made from this film, the coffee mixture was inserted together with the tray, and the opening of the bag was heat sealed. Vacuum drying was performed in the same manner as in Example 4, and after returning to atmospheric pressure over 1 hour and taking out the dryer and confirming the tearing of the bag, the bag was ruptured and the content was scattered, so the dried state of the content, The evaluation was stopped without confirming the presence or absence of contamination or scattering.
＜実施例１２＞
実施例３で凍結処理まで行ったカットネギ入り袋と、実施例９で凍結処理まで行ったコーヒー混合物を、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例１３＞
実施例４で凍結処理まで行ったカットネギ入り袋と、実施例１０で凍結処理まで行ったコーヒー混合物を、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
＜実施例１４＞
実施例５で凍結処理まで行ったカットネギ入り袋と、実施例１１で凍結処理まで行ったコーヒー混合物を、２時間かけて真空度０．５Torrまで真空乾燥し、二次乾燥として、その真空度を保ちながら、３０℃のヒーターで２２時間加温した。１時間かけて大気圧に戻し乾燥機から出して袋の破れ、内容物の乾燥状態、異物混入、飛散の有無を確認した。
<Example 12>
The cut green onion bag that has been subjected to the freezing treatment in Example 3 and the coffee mixture that has been subjected to the freezing treatment in Example 9 are vacuum-dried to a vacuum degree of 0.5 Torr over 2 hours, and the degree of vacuum is set as secondary drying. While maintaining, the mixture was heated with a heater at 30 ° C. for 22 hours. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 13>
The cut green onion bag that had been subjected to the freezing treatment in Example 4 and the coffee mixture that had been subjected to the freezing treatment in Example 10 were vacuum-dried to a vacuum degree of 0.5 Torr over 2 hours, and the degree of vacuum was set as secondary drying. While maintaining, the mixture was heated with a heater at 30 ° C. for 22 hours. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
<Example 14>
The cut green onion bag that has been subjected to the freezing treatment in Example 5 and the coffee mixture that has been subjected to the freezing treatment in Example 11 are vacuum-dried to a vacuum degree of 0.5 Torr over 2 hours, and the degree of vacuum is set as secondary drying. While maintaining, the mixture was heated with a heater at 30 ° C. for 22 hours. It returned to atmospheric pressure over 1 hour, and it removed from the dryer, and the presence or absence of the tear of a bag, the dried state of a content, foreign material mixing, and scattering was confirmed.
評価結果を表２に示す。
表中の記号の説明は下記のとおりである。
袋の破れ・・・・○：良好
□：袋の一部が破裂したが、内容物飛散なし
△：袋の一部が破裂し内容物が少し飛散した
×：破裂し内容物の大半が飛散した
乾燥状態・・・・○：水分含量２％以下で乾燥良好
□：水分含量２〜６％で大半乾燥できた
△：乾燥不十分
×：水分が残っている
異物の混入、飛散 ○：異物無し
□：他の成分が僅かに混じっていた
△：他の成分が目立つほど混じっていた。
×：他の成分や真空乾燥機内のホコリが目立つほど混じっていた
□※：ネギの袋内に、コーヒーの粉が僅かに混じっていた
評価結果について、○及び□を合格とし、△及び×を不合格とした。
The symbols in the table are explained as follows.
Bag tear ... ○: Good
□: A part of the bag ruptured, but the contents were not scattered
Δ: A part of the bag ruptured and the contents slightly scattered
×: Most of the contents ruptured and scattered. Dry state: ○: Moisture content 2% or less, good drying
□: Mostly dried with a moisture content of 2-6%
Δ: Insufficient drying
×: Moisture remaining Foreign matter mixed and scattered ○: No foreign matter
□: Other ingredients were slightly mixed
Δ: Other components were conspicuously mixed.
X: Other components and dust in the vacuum dryer were conspicuously mixed
□ *: Regarding the evaluation results in which the coffee powder was slightly mixed in the leek bag, ○ and □ were accepted, and Δ and × were rejected.
本発明による凍結真空乾燥用包装袋及び凍結真空乾燥用包装袋を用いた凍結真空乾燥方法は、例えば、カップ麺や即席みそ汁の具材、お菓子に混ぜる原料、薬品の固形化、粉末化に使用することができる。 Freeze-vacuum drying packaging bags and freeze-vacuum drying methods using freeze-vacuum drying packaging bags according to the present invention include, for example, cup noodles and instant miso soup ingredients, raw materials to be mixed in sweets, solidification of chemicals, and powdering Can be used.
Claims (4)
前記包装袋の材質が高分子フィルムであり、前記包装袋のシール部分全てのシール強度が１８Ｎ／１５ｍｍ以上であり、
前記高分子フィルムの引張強度の伸びが４５％であり、かつ前記高分子フィルムは、ポリエステル系樹脂またはポリアミド系樹脂と、ポリエチレンまたはエチレン−酢酸ビニル共重合体の単層または複層とをラミネートしたものであり、
凍結した被凍結真空乾燥物を包装し、その後真空乾燥処理を行うために用いられることを特徴とする凍結真空乾燥用包装袋。 A packaging bag for packaging a freeze-dried product to be freeze-dried when it is subjected to freeze-vacuum drying treatment, wherein the packaging bag has an average pore diameter of 10 μm to 3 mm and an aperture area ratio of 2 × 10 −6 to 8 × 10 −2 %. And
The material of the packaging bag is a polymer film, and the sealing strength of all the sealing portions of the packaging bag is 18 N / 15 mm or more,
Tensile elongation strength Ri 45% der, and the polymer film of the polymer film, a polyester resin or a polyamide resin, a polyethylene or an ethylene - laminating a single layer of vinyl acetate copolymer or a multilayer And
A packaging bag for freeze-drying, characterized in that it is used for packaging a freeze- dried product to be frozen and then performing a vacuum-drying process .
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