JP2005059870A - Packaging bag having function of steam venting and package using the same - Google Patents

Packaging bag having function of steam venting and package using the same Download PDF

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JP2005059870A
JP2005059870A JP2003290038A JP2003290038A JP2005059870A JP 2005059870 A JP2005059870 A JP 2005059870A JP 2003290038 A JP2003290038 A JP 2003290038A JP 2003290038 A JP2003290038 A JP 2003290038A JP 2005059870 A JP2005059870 A JP 2005059870A
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seal
packaging bag
bottom seal
steam
film
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JP4337466B2 (en
Inventor
Eishin Miyake
英信 三宅
Kiyoshi Sawada
清志 澤田
Hirofumi Kawai
広文 河合
Ikuno Shino
郁乃 示野
Koichi Shiozaki
浩一 塩崎
Atsushi Tsujii
篤 辻井
Yukihiro Nakamura
行宏 中村
Kayoko Hamada
佳代子 浜田
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag, which releases its inner pressure caused by heating when subjected to microwave heating and has a steam venting function of preventing the pollution of the bag interior, and a package using the bag. <P>SOLUTION: According to the packaging bag, two front and back body films 1, 2, each having a sealant layer 22, are arranged to be counter to each other with each sealant layer on the inside, and the periphery of both films is sealed with a top seal 11, a side seals 12, and a bottom seal 13. The back body film 2 is folded into a Z shape near and in parallel with the bottom seal 13 across the bag width to form a fold-in part 3. At the position that overlaps the bottom seal 13 and is on the edge of the front body film 1, a steam vent hole 14 is drilled and an easy peal tape 4 covering the steam vent hole 14 is heat welded in parallel with the bottom seal 13. Inward extending seals 15, which extend to the bag interior and are continuous with the side seals 12, are formed on the part of the side seals 12 that is near the bottom seal 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、食品等を収容する包装袋に関し、特には、電子レンジ等の加熱手段を用いて加熱した時、発生する蒸気の力で包装袋の開口を行う蒸気抜き機能を有する包装袋とそれを用いた包装体に関する。   TECHNICAL FIELD The present invention relates to a packaging bag for storing foods and the like, and in particular, a packaging bag having a steam vent function for opening a packaging bag with the force of steam generated when heated using heating means such as a microwave oven, and the like. The present invention relates to a package using

従来、調理済のあるいは半調理済の食品等を耐熱性のプラスチックフィルムからなる包装袋に充填して、食する直前に電子レンジにより加熱して調理する包装食品が提案されている。   2. Description of the Related Art Conventionally, packaged foods have been proposed in which a cooked or semi-cooked food or the like is filled in a packaging bag made of a heat-resistant plastic film and cooked by heating with a microwave just before eating.

しかし、この包装食品は、電子レンジで加熱すると、加熱時に食品等から発生する蒸気圧などの内圧により、包装袋が破裂して内容物が飛散してしまい、電子レンジの内部を汚染してしまう欠点があった。   However, when this packaged food is heated in a microwave oven, the packaging bag ruptures and the contents are scattered due to internal pressure such as vapor pressure generated from the food during heating, and the inside of the microwave oven is contaminated. There were drawbacks.

このため、電子レンジで加熱する前に、あらかじめ、包装袋に、例えば、ハサミ等を用いて小さい孔等を開けて、あるいは、袋の一部を切り取って、包装袋内部の内圧の上昇を抑えて包装袋の破裂を防止していた。   For this reason, before heating in a microwave oven, a small hole etc. are opened in a packaging bag beforehand, for example using scissors, or a part of a bag is cut off, and the rise in internal pressure inside a packaging bag is suppressed. The packaging bag was prevented from rupturing.

しかしながらこの方法では、加熱後発生する水蒸気は，直ぐに包装袋の外に放出されてしまうため、水蒸気による蒸し調理効果が低減されるとともに包装袋内部の食品の乾燥が進行して、食品の劣化をきたす場合がある。   However, in this method, water vapor generated after heating is immediately released out of the packaging bag, so that the steam cooking effect by the water vapor is reduced and the food inside the packaging bag is dried, which causes deterioration of the food. May come.

これらの問題点を解消すべく、例えば、図４に示すような、プラスチックフィルム（１０１）によりその同一面側を互いに当接させて、所定巾のヒートシールにより合掌状に接合する第一接合部（１０２）を設けて、その内部に加熱処理用の内容物（１０５）を密封包装させる包装体にあって、前記第一接合部（１０２）は、包装体の一方の側部に片寄せさせて設け、加熱による包装体の内部圧力が上昇したとき、その逃圧を行なう易開封性シールである加熱処理用包装体が提案されている（例えば、特許文献１参照）。
特開平９−１５０８６４号公報（図１） しかし、この方法を採用しても、加熱後の状況を見ると、内容物の飛散が袋部に散見でき完全な方法とは言いがたい。 In order to solve these problems, for example, as shown in FIG. 4, a first joining portion that joins the same surface side with each other by a plastic film (101) and joins in a palm shape by heat sealing with a predetermined width. (102) is provided, and the contents (105) for heat treatment are hermetically packaged therein, and the first joint (102) is shifted to one side of the package. There has been proposed a heat-treatment packaging body that is an easy-open seal that performs relief when the internal pressure of the packaging body increases due to heating (see, for example, Patent Document 1).
However, even if this method is adopted, it is difficult to say that the content is scattered in the bag portion when the situation after heating is observed.

本発明は、上記した問題点を解決するためになされたもので、電子レンジで加熱調理しても、加熱により生ずる包装体の内部圧力を逃がすことができ、かつ、袋内が汚染されることのない蒸気抜き機能を有する包装袋とそれを用いた包装体を提供することを課題とする。   The present invention has been made to solve the above-described problems, and even when cooked in a microwave oven, the internal pressure of the package produced by heating can be released, and the inside of the bag is contaminated. It is an object of the present invention to provide a packaging bag having a steam venting function and a packaging body using the packaging bag.

本発明の請求項１の発明は、互いにシーラント層を有する表裏二枚の本体フィルムをシーラント層を内側にして対向させて、周囲を天シール、側シール、底シールしてなる包装袋であって、裏側の本体フィルムは、横幅全体にわたって底シール近傍で底シールと平行にＺ字状に折り曲げられて前記裏側の本体フィルムから外方に突出する折り込み部が形成され、表側の本体フィルムの端縁で底シールと重なる位置には蒸気抜き口が穿設されると共に、該蒸気抜き口を覆うように易剥離性を有するイージーピールテープが底シールと平
行に横幅全体に熱融着され、前記側シールの底シール寄り近傍は、側シールと連続する側シールから内側に入り込んだ状態で入り込みシール部が形成されていることを特徴とする、蒸気抜き機能を有する包装袋である。 The invention of claim 1 of the present invention is a packaging bag in which two main body films having a sealant layer are opposed to each other with the sealant layer inside and the periphery is sealed with a top seal, side seal and bottom seal. The back-side main body film is folded in a Z-shape in the vicinity of the bottom seal in the vicinity of the bottom seal over the entire width to form a folded portion that protrudes outward from the back-side main body film. In addition, a steam vent is formed at a position overlapping with the bottom seal, and an easy peel tape having easy peelability to cover the steam vent is heat-sealed to the entire width in parallel with the bottom seal. A packaging bag having a steam venting function, wherein an entrance seal portion is formed near the bottom seal of the seal so as to enter the inside from a side seal continuous with the side seal. A.

このように請求項１記載の発明によれば、裏側の本体フィルムは、横幅全体にわたって底シール近傍で底シールと平行にＺ字状に折り曲げられて前記裏側の本体フィルムから外方に突出する折り込み部が形成され、表側の本体フィルムの端縁で底シールと重なる位置には蒸気抜き口が穿設されると共に、該蒸気抜き口を覆うように易剥離性を有するイージーピールテープが底シールと平行に横幅全体に熱融着され、前記側シールの底シール寄り近傍は、側シールと連続する側シールから内側に入り込んだ状態で入り込みシール部が形成されているので、内容物を充填して開口部（底部）を密封シールした包装袋を、電子レンジ等の加熱手段で加熱すると、蒸気等で膨らんだ内圧は、底シールに穿設された蒸気抜き口からイージーピールテープを剥離させながら放出されて包装袋が破裂するようなことがない。また、底シールのシール面積が広くなっているので、その部分は電子レンジなどの加熱手段で加熱した直後でも手指等で容易に持つことができる。   Thus, according to the first aspect of the present invention, the main film on the back side is folded in a Z-shape in the vicinity of the bottom seal in parallel with the bottom seal over the entire width, and protrudes outward from the main film on the back side. Is formed at the edge of the main body film on the front side and overlaps with the bottom seal, and an easy peel tape having easy peelability to cover the steam release port is formed with the bottom seal. Parallel to the entire width of the side seal, the side seal near the bottom seal is formed with an intrusion seal portion that enters the inside from the side seal continuous with the side seal. When a packaging bag whose opening (bottom) is hermetically sealed is heated with heating means such as a microwave oven, the internal pressure expanded by steam or the like is easily peeled from the steam vent formed in the bottom seal. Packaging bag is released while peeling is not as burst. Further, since the sealing area of the bottom seal is wide, the portion can be easily held with fingers or the like even immediately after being heated by heating means such as a microwave oven.

また、請求項２の発明は、請求項１の発明において、前記蒸気抜き口は１か所又は２か所以上穿設されていることを特徴とする、蒸気抜き機能を有する包装袋である。   The invention of claim 2 is the packaging bag having a steam venting function according to the invention of claim 1, wherein the steam vent is formed at one place or two or more places.

このように請求項２記載の発明によれば、蒸気抜き口は１か所又は２か所以上穿設されているので、袋が破裂するといったような危険な状態がなく安全性が確保できる。   Thus, according to the invention described in claim 2, since the steam vent is formed at one place or two places or more, safety can be ensured without a dangerous state such as the bag bursting.

また、請求項３の発明は、請求項１又は２の発明において、前記蒸気抜き口が、小孔、切り欠き、又はスリットのいずれかであることを特徴とする、蒸気抜き機能を有する包装袋である。   The invention according to claim 3 is the packaging bag having a steam venting function according to the invention of claim 1 or 2, wherein the steam vent is any one of a small hole, a notch or a slit. It is.

このように請求項３記載の発明によれば、蒸気抜き口が、小孔、切り欠き、又はスリットのいずれかであるので、収納する内容物等により適宜最適の蒸気抜き口を選定できる。   Thus, according to the invention described in claim 3, since the steam vent is any one of a small hole, a notch, and a slit, the optimum steam vent can be appropriately selected according to the contents to be stored.

また、請求項４の発明は、請求項１、２又は３の発明において、前記底シール近傍には、易カット手段が設けられていることを特徴とする、蒸気抜き機能を有する包装袋である。   The invention of claim 4 is the packaging bag having a steam venting function according to claim 1, 2 or 3, wherein an easy-cut means is provided in the vicinity of the bottom seal. .

このように請求項４記載の発明によれば、底シール近傍には、易カット手段が設けられているので、はさみ等の治具を使用せずとも容易に包装袋を開封することができる。   Thus, according to the invention described in claim 4, since the easy-cut means is provided in the vicinity of the bottom seal, the packaging bag can be easily opened without using a jig such as scissors.

また、請求項５の発明は、請求項１、２、３又は４記載の蒸気抜き機能を有する包装袋に内容物を充填して開口部を熱融着した包装体を、折り込み部が形成された本体フィルム面を下にして横置きして加熱し、包装体の内圧が上昇したとき、蒸気抜き口から内圧が逃げだすようにしたことを特徴とする、蒸気抜き機能を有する包装体である。   According to a fifth aspect of the present invention, a folded portion is formed of a package body in which the contents are filled in the packaging bag having the steam release function according to the first, second, third, or fourth aspect and the opening is heat-sealed. The package body having a steam venting function is characterized in that the internal pressure escapes from the steam vent port when the main body film surface is placed sideways and heated to increase the internal pressure of the package body.

上記のように、本発明の蒸気抜き機能を有する包装袋とそれを用いた包装体を使用することにより、次に述べるような効果がある。   As described above, the following effects can be obtained by using the packaging bag having the steam release function of the present invention and the package using the packaging bag.

すなわち、内圧が上昇すると、イージーピールテープのシール部分が後退して蒸気抜け口から蒸気が安定して抜ける。
折り込み部を下面に位置させることにより、上面の蒸気抜き口を高い位置に設定することができる。
また、蒸気抜き後でも開口が高い位置となり、冷めても内容物が蒸気抜け口からもれ出す
ことがない。 That is, when the internal pressure rises, the seal portion of the easy peel tape moves backward and the steam is stably discharged from the steam outlet.
By positioning the folding portion on the lower surface, the upper steam outlet can be set at a higher position.
In addition, the opening remains at a high position even after the steam is vented, and the contents do not leak out of the steam outlet even when cooled.

底シールを折り込み部より外側に出すことにより、手で開封し易くなる。また、内容物取り出しのための開封は、ノッチ、ミシン目線等の引き裂き誘導線などを設けたり、基材に直線カット性の延伸ナイロンフィルムを使用する等の方法により安定して開封できる。底シールの近傍に入り込みシール部を設けたので、包装体が持ち易い。   By opening the bottom seal outside the folding part, it is easy to open by hand. Moreover, the opening for taking out the contents can be stably opened by a method such as providing a tear induction line such as a notch or a perforation line, or using a straight-cut stretched nylon film as a substrate. Since the seal part is provided in the vicinity of the bottom seal, the package is easy to hold.

本発明の蒸気抜き機能を有する包装袋とそれを用いた包装体を一実施形態に基づいて以下に詳細に説明する。   A packaging bag having a steam venting function and a packaging body using the same according to the present invention will be described below in detail based on an embodiment.

本発明の蒸気抜き機能を有する包装袋は、例えば、図１、図２に示すように、互いにシーラント層（２２）を有する表裏二枚の本体フィルム（１、２）をシーラント層を内側にして対向させて、周囲を天シール（１１）、側シール（１２）、底シール（１３）してなる包装袋（１０）である。   For example, as shown in FIG. 1 and FIG. 2, the packaging bag having the steam release function of the present invention has two main body films (1, 2) each having a sealant layer (22) with the sealant layer inside. It is a packaging bag (10) which is made to face and has a top seal (11), side seal (12), and bottom seal (13).

そして、裏側の本体フィルム（２）は、横幅全体にわたって底シール近傍で底シール（１３）と平行にＺ字状に折り曲げられて裏側の本体フィルムから外方に突出する折り込み部（３）が形成されている。   Then, the back side main body film (2) is folded in a Z-shape in the vicinity of the bottom seal and in parallel with the bottom seal (13) over the entire width to form a folded portion (3) protruding outward from the back side main body film. Has been.

また、表側の本体フィルム（１）の端縁で底シールと重なる位置には、蒸気抜き口（１４）が穿設されている。
蒸気抜き口（１４）は、底シール（１３）の中央部分に小孔として設けても良いし、端縁部分に切り欠き、スリットとして設けても良い。 Further, a steam vent (14) is formed at a position overlapping the bottom seal at the edge of the main film (1) on the front side.
The steam vent (14) may be provided as a small hole in the center portion of the bottom seal (13), or may be provided as a slit in the edge portion.

そして、蒸気抜き口（１４）を覆うように易剥離性を有するイージーピールテープ（４）が底シール（１３）と平行に横幅全体に熱融着されている。
なお、イージーピールテープ（４）は、横幅全体に熱融着せれていなくても、蒸気抜き口（１４）を覆う一部に熱融着されていれば構わない。 And the easy peel tape (4) which has easy peelability so that a vapor vent (14) may be covered is heat-sealed to the whole breadth in parallel with a bottom seal (13).
In addition, even if the easy peel tape (4) is not heat-sealed to the whole width, it does not matter as long as it is heat-sealed to a part covering the steam vent (14).

また、側シール（１２）の底シール寄り近傍は、側シールと連続して側シールから内側に入り込んだ状態で入り込みシール部（１５）が形成されている。このため、底シール寄りの側シールはシール部分が広く形成され、電子レンジなどの加熱手段で加熱した直後でも手指等で容易に持つことができる。   Further, an entrance seal portion (15) is formed near the bottom seal of the side seal (12) in a state of entering the inside from the side seal continuously with the side seal. For this reason, the side seal near the bottom seal has a wide seal portion, and can be easily held with fingers or the like even immediately after being heated by heating means such as a microwave oven.

蒸気抜き口（１４）は、１か所だけでなく２か所以上設けても構わない。
また、底シール（１３）近傍には、切り欠き、ミシン目線等による易カット手段（１６）が設けられている。
易カット手段（１６）を設けることにより、はさみなどの切断器具を使用せずに包装袋を容易に引き裂き開封することができる。 The steam vent (14) may be provided not only at one place but also at two or more places.
Further, near the bottom seal (13), easy cut means (16) by notches, perforation lines and the like are provided.
By providing the easy-cutting means (16), the packaging bag can be easily torn and opened without using a cutting instrument such as scissors.

包装袋を構成する表側の本体フィルム（１）や裏側の本体フィルム（２）は、少なくとも基材（２１）とシーラント層（２２）を積層した複合フィルムから構成される（図２（ａ）参照）。   The main body film (1) on the front side and the main body film (2) on the back side constituting the packaging bag are composed of a composite film in which at least a base material (21) and a sealant layer (22) are laminated (see FIG. 2 (a)). ).

基材（２１）は、包装袋の基材となる層で、シート状またはフィルム状のものであって、ポリオレフィン（ポリエチレン、ポリプロピレン等）、ポリエステル（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、ポリエチレンナフレート等）、ポリアミド（ナイロン−６、ナイロン−６６、ポリイミド等）など、あるいはこれらの高分子の共など、通常包装材料として用いられる比較的耐熱性を有するプラスチックフィルムないしは
シートが使用できる。 A base material (21) is a layer which becomes a base material of a packaging bag, and is a sheet-like or film-like material such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthate, etc.) Polyamide (nylon-6, nylon-66, polyimide, etc.) or the like, or a combination of these polymers can be used as a relatively heat-resistant plastic film or sheet that is usually used as a packaging material.

この基材（２１）には、例えば、帯電防止剤、紫外線吸収剤、可塑剤、滑剤、着色剤などの公知の添加剤を加えることができ、必要に応じて適宜添加される。
さらに基材（２１）の表面をコロナ放電処理、アンカーコート処理等の表面改質を行い、後記するシーラント層（２２）等との接着性を向上させることもできる。
また、必要に応じて、基材の表面または裏面に印刷層（図示せず）を形成させることができる。 For example, known additives such as an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a colorant can be added to the base material (21), and they are appropriately added as necessary.
Furthermore, the surface of the base material (21) can be subjected to surface modification such as corona discharge treatment or anchor coating treatment to improve adhesion with a sealant layer (22) described later.
Moreover, a printing layer (not shown) can be formed in the surface or back surface of a base material as needed.

ガスバリア性をアルミニウム箔なみに向上させるため、基材のプラスチックフィルムに、酸化アルミニウムや酸化ケイ素などの無機化合物の薄膜を物理蒸着あるいは化学蒸着などの蒸着法により２０〜１００ｎｍ程度の厚さに設けた無機化合物蒸着プラスチックフィルムを用いることもできる。
この場合のプラスチックフィルムとしては、延伸されたポリエチレンテレフタレートフィルムが好ましく使用できる。 In order to improve the gas barrier property like an aluminum foil, a thin film of an inorganic compound such as aluminum oxide or silicon oxide was provided on a plastic film as a base material to a thickness of about 20 to 100 nm by a vapor deposition method such as physical vapor deposition or chemical vapor deposition. An inorganic compound vapor-deposited plastic film can also be used.
As the plastic film in this case, a stretched polyethylene terephthalate film can be preferably used.

シーラント層（２２）は、ポリエチレン、ポリプロピレン、エチレン共重合体、飽和ポリエステルなど熱融着性のある樹脂であれば使用できるが、電子レンジ適性等を考慮すると、厚さが６０〜８０μｍ程度のポリプロピレン樹脂がより好ましく使用できる。   The sealant layer (22) can be used as long as it is a heat-sealable resin such as polyethylene, polypropylene, ethylene copolymer, and saturated polyester. However, in consideration of suitability for a microwave oven, the thickness of the polypropylene is about 60 to 80 μm. Resins can be used more preferably.

落下強度、突き刺し強度やガスバリア性を向上させる必要がある場合、図２（ｂ）に示すように、基材（２１）とシーラント層（２２）の間に中間層（２３）を介在させることができる。
中間層（２３）としては、例えば、ナイロンフィルム、ポリエステルフィルム等が好ましく使用できる。また、この中間層には、酸化ケイ素、酸化アルミニウム等の無機化合物の蒸着層を含んでも良い。 When it is necessary to improve the drop strength, the piercing strength and the gas barrier property, an intermediate layer (23) may be interposed between the base material (21) and the sealant layer (22) as shown in FIG. 2 (b). it can.
As an intermediate | middle layer (23), a nylon film, a polyester film, etc. can be used preferably, for example. The intermediate layer may include a vapor deposition layer of an inorganic compound such as silicon oxide or aluminum oxide.

基材（２１）とシーラント層（２２）、あるいは、基材（２１）と中間層（２３）、中間層（２３）とシーラント層（２２）の貼り合わせは、例えば、二液反応型のポリウレタン樹脂系接着剤を使用したドライラミネート法等の公知のラミネート方法を用いて容易に行うことができる。   The substrate (21) and the sealant layer (22), or the substrate (21) and the intermediate layer (23), and the intermediate layer (23) and the sealant layer (22) are bonded together, for example, by a two-component reaction type polyurethane It can be easily performed using a known laminating method such as a dry laminating method using a resin adhesive.

イージーピールテープ（４）は、易剥離性、電子レンジ適性に優れたイージーピールフィルム単体が好ましく、より具体的には、東レ合成フィルム株式会社製や東セロ株式会社製の厚さが３０〜５０μｍ程度の未延伸ポリプロピレン樹脂系のイージーピールフィルムが好ましく使用できる。   The easy peel tape (4) is preferably an easy peel film that is easily peelable and has excellent suitability for microwave ovens. More specifically, the thickness made by Toray Synthetic Film Co., Ltd. or Tosero Co., Ltd. is about 30-50 μm. An unstretched polypropylene resin-based easy peel film can be preferably used.

以下実施例により本発明を詳細に説明する。
〈実施例１〉
表側の本体フィルム（１）及び裏側の本体フィルム（２）として、酸化アルミニウム蒸着ポリエチレンテレフタレートフィルム（厚さ１２μｍ）（２１）／二軸延伸ナイロンフィルム（厚さ１５μｍ）（２３）／未延伸ポリプロピレンフィルム（厚さ８０μｍ）（２２）の層構成からなる複合フィルムを準備した。 Hereinafter, the present invention will be described in detail by way of examples.
<Example 1>
As the main body film (1) on the front side and the main body film (2) on the back side, an aluminum oxide-deposited polyethylene terephthalate film (thickness 12 μm) (21) / biaxially stretched nylon film (thickness 15 μm) (23) / unstretched polypropylene film A composite film having a layer structure of (thickness 80 μm) (22) was prepared.

別に、イージーピールテープ（４）として、折り込み部と略同幅のテープ状にカットしたレトルト用イージーピールフィルム、ＣＭＰＳ ０１３Ｃ（東セロ株式会社製）（厚さ５０μｍ）を準備した。   Separately, as an easy peel tape (4), an easy peel film for retort, CMPS 013C (manufactured by Tosero Co., Ltd.) (thickness 50 μm), which was cut into a tape shape approximately the same width as the folded portion, was prepared.

つぎに、裏側の本体フィルム（２）を中央より端縁寄りで横方向に折り曲げ線によりＺ
字状に２つ折りして本体フィルムから突出させた折り込み部（３）を形成させた。
また、表側の本体フィルム（１）の端縁で底シールと重なる位置に蒸気抜き口（１４）として小孔を穿設した。 Next, the main body film (2) on the back side is moved from the center toward the edge and laterally bent by a fold line.
A folded portion (3) was formed that was folded in two in a letter shape and protruded from the main body film.
In addition, a small hole was formed as a steam vent (14) at a position overlapping the bottom seal at the edge of the main film (1) on the front side.

蒸気抜き口（１４）を覆うようにして適当幅のイージーピールテープ（４）を表側の本体フィルム（１）の内側に全幅にわたって熱融着させた。   An easy peel tape (4) having an appropriate width was heat-sealed over the entire width of the main body film (1) on the front side so as to cover the steam vent (14).

このような加工を施した表側の本体フィルム（１）と裏側の本体フィルム（２）とを、シーラント層（２２）同士を対向させて重ね合わせ、それぞれ底シール（１３）、側シール（１２）を施し、実施例１の蒸気抜き機能を有する包装袋（１０）を作製した（図１（ａ）、（ｂ）参照）。   The main film (1) on the front side and the main film (2) on the back side subjected to such processing are overlapped with the sealant layers (22) facing each other, and the bottom seal (13) and the side seal (12), respectively. And a packaging bag (10) having a vapor venting function of Example 1 was produced (see FIGS. 1 (a) and 1 (b)).

なお、側シールの両端縁で底シールの近傍に、底シールから開封する際、その開封を助ける、例えば、切り欠きや引き裂き誘導線のような易カット手段（１６）を設けておくと、はさみ等の道具を使用せずに容易に包装袋を開封することができる。   It should be noted that, when opening from the bottom seal near the bottom seal at both end edges of the side seal, for example, an easy-cutting means (16) such as a notch or a tear guide wire is provided as a scissor. The packaging bag can be easily opened without using a tool such as.

また、底シール（１３）が折り込み部（３）より引っ込むような形状でシールされても良い。但し、底シールは先端部分だけシールして、根元部分はシールしない。こうすることにより、内容物を充填した包装体を横置きして加熱し、膨張させた際、蒸気の抜けるところが上の方に位置することになる。   Further, the bottom seal (13) may be sealed in such a shape that it is retracted from the folding part (3). However, the bottom seal only seals the tip, not the root. By doing so, when the packaging body filled with the contents is placed sideways, heated and expanded, the place where the steam escapes is positioned on the upper side.

この包装袋に適量の水（３０）を充填し、開口部（１１）を密封シールして包装体（２０）とし、この包装体（２０）をイージーピールテープ（４）が熱融着された折り込み部（３）を下にして横置きして電子レンジで加熱した。   This packaging bag was filled with an appropriate amount of water (30), the opening (11) was hermetically sealed to form a package (20), and the easy peel tape (4) was heat-sealed to the package (20). The folding part (3) was placed sideways and heated in a microwave oven.

加温とともに内圧が上昇し、包装袋は膨張してきたが、イージーピールテープ（４）のシール部分が後退して蒸気抜け口（１４）が開口して、内部の蒸気（ｖ）は外に抜けて放出され、包装袋が破袋することはなかった。また、内容物（３０）が漏れだすこともなかった（図３参照）。   The internal pressure increased with heating, and the packaging bag expanded, but the seal part of the easy peel tape (4) was retracted, the steam outlet (14) was opened, and the internal steam (v) escaped outside. The packaging bag did not break. Further, the contents (30) did not leak out (see FIG. 3).

本発明の蒸気抜き機能を有する包装袋の一実施例を示す、（ａ）は斜視説明図であり、（ｂ）は（ａ）のＡ−Ａ’線断面説明図である。One Example of the packaging bag which has a steam release function of this invention is shown, (a) is a perspective explanatory drawing, (b) is the A-A 'sectional explanatory drawing of (a). （ａ）〜（ｂ）は、本発明の蒸気抜き機能を有する包装袋に使用する本体フィルムや底体フィルムの層構成の一例を示す断面説明図である。(A)-(b) is sectional explanatory drawing which shows an example of the layer structure of the main body film and bottom body film which are used for the packaging bag which has a vapor removal function of this invention. 図１の蒸気抜き機能を有する包装袋に内容物を充填し、開口部を熱融着した包装体を、折り込み部を下にして横置きし、電子レンジで加熱して、蒸気抜き口から蒸気が放出している状態を示す、断面説明図である。The packaging body having the steam venting function shown in FIG. 1 is filled with the contents, and the opening is heat-sealed. It is sectional explanatory drawing which shows the state which has discharge | released. （ａ）〜（ｃ）は、従来の加熱処理用包装袋の一例を示す、説明図である。(A)-(c) is explanatory drawing which shows an example of the conventional packaging bag for heat processing.

符号の説明Explanation of symbols

１‥‥本体フィルム（表側）
２‥‥本体フィルム（裏側）
３‥‥折り込み部
４‥‥イージーピールテープ
１０‥‥包装袋
１１‥‥天シール、開口部
１２‥‥側シール
１３‥‥底シール
１４‥‥蒸気抜き口
１５‥‥入り込みシール部
１６‥‥易カット手段
２０‥‥包装体
２１‥‥基材
２２‥‥シーラント層
２３‥‥中間層
３０‥‥内容物
１０１‥‥プラスチックフィルム
１０２‥‥第一接合部
１０５‥‥内容物
ｖ‥‥蒸気 1. Main body film (front side)
2. Main body film (back side)
3 ... Folding part 4 ... Easy peel tape 10 ... Packaging bag 11 ... Top seal, opening 12 ... Side seal 13 ... Bottom seal 14 ... Vapor vent 15 ... Insert seal part 16 ... Easy Cutting means 20 ... Package 21 ... Base material 22 ... Sealant layer 23 ... Intermediate layer 30 ... Contents 101 ... Plastic film 102 ... First joint 105 ... Contents v ... Steam

Claims (5)

互いにシーラント層を有する表裏二枚の本体フィルムをシーラント層を内側にして対向させて、周囲を天シール、側シール、底シールしてなる包装袋であって、
裏側の本体フィルムは、横幅全体にわたって底シール近傍で底シールと平行にＺ字状に折り曲げられて前記裏側の本体フィルムから外方に突出する折り込み部が形成され、
表側の本体フィルムの端縁で底シールと重なる位置には蒸気抜き口が穿設されると共に、該蒸気抜き口を覆うように易剥離性を有するイージーピールテープが底シールと平行に横幅全体に熱融着され、
前記側シールの底シール寄り近傍は、側シールと連続する側シールから内側に入り込んだ状態で入り込みシール部が形成されていることを特徴とする、蒸気抜き機能を有する包装袋。 A packaging bag in which two main body films having a sealant layer are opposed to each other with the sealant layer inside, and the periphery is a top seal, side seal, and bottom seal,
The body film on the back side is folded in a Z shape in parallel with the bottom seal in the vicinity of the bottom seal over the entire width, and a fold portion protruding outward from the body film on the back side is formed,
A steam vent is drilled at the edge of the main film on the front side so as to overlap the bottom seal, and easy peel tape with easy peelability to cover the steam vent covers the entire width in parallel with the bottom seal. Heat-sealed,
A packaging bag having a steam venting function, wherein an entrance seal portion is formed in the vicinity of the bottom seal near the bottom seal so as to enter the inside from a side seal continuous with the side seal. 前記蒸気抜き口は１か所又は２か所以上穿設されていることを特徴とする、請求項１記載の蒸気抜き機能を有する包装袋。   The packaging bag having a steam venting function according to claim 1, wherein the steam vent is formed at one place or two or more places. 前記蒸気抜き口が、小孔、切り欠き、又はスリットのいずれかであることを特徴とする、請求項１又は２記載の蒸気抜き機能を有する包装袋。   The packaging bag having a steam venting function according to claim 1 or 2, wherein the steam vent is any one of a small hole, a notch, and a slit. 前記底シール近傍には、易カット手段が設けられていることを特徴とする、請求項１、２又は３記載の蒸気抜き機能を有する包装袋。   4. The packaging bag having a steam venting function according to claim 1, wherein an easy-cut means is provided in the vicinity of the bottom seal. 請求項１、２、３又は４記載の蒸気抜き機能を有する包装袋に内容物を充填して開口部を熱融着した包装体を、折り込み部が形成された本体フィルム面を下にして横置きして加熱し、包装体の内圧が上昇したとき、蒸気抜き口から内圧が逃げだすようにしたことを特徴とする、蒸気抜き機能を有する包装体。   A packaging body in which the contents are filled in the packaging bag having the steam venting function according to claim 1, and the opening portion is heat-sealed, with the main body film surface on which the folding portion is formed facing down. A packaging body having a steam venting function, characterized in that when the internal pressure of the packaging body rises when placed and heated, the internal pressure escapes from the steam vent.
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JP2008273538A (en) * 2007-04-25 2008-11-13 Kyodo Printing Co Ltd Microwave heatable packaging bag
JP2008297015A (en) * 2008-09-12 2008-12-11 Toyo Seikan Kaisha Ltd Plastic pouch
JP2011148504A (en) * 2010-01-19 2011-08-04 Toppan Printing Co Ltd Container for microwave oven
US8157445B2 (en) 2004-08-25 2012-04-17 Toyo Seikan Kaisha, Ltd. Plastic pouch and manufacturing method therefor
JP2015531157A (en) * 2013-09-13 2015-10-29 エルジー・ケム・リミテッド Pouch type case, battery cell, and battery cell manufacturing method
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JP2006062672A (en) * 2004-08-25 2006-03-09 Toyo Seikan Kaisha Ltd Plastic pouch
US8157445B2 (en) 2004-08-25 2012-04-17 Toyo Seikan Kaisha, Ltd. Plastic pouch and manufacturing method therefor
JP2008074466A (en) * 2006-09-22 2008-04-03 Dainippon Printing Co Ltd Universal design pouch
JP2008273538A (en) * 2007-04-25 2008-11-13 Kyodo Printing Co Ltd Microwave heatable packaging bag
JP2008297015A (en) * 2008-09-12 2008-12-11 Toyo Seikan Kaisha Ltd Plastic pouch
JP4687763B2 (en) * 2008-09-12 2011-05-25 東洋製罐株式会社 Plastic pouch
JP2011148504A (en) * 2010-01-19 2011-08-04 Toppan Printing Co Ltd Container for microwave oven
JP2015531157A (en) * 2013-09-13 2015-10-29 エルジー・ケム・リミテッド Pouch type case, battery cell, and battery cell manufacturing method
US9553298B2 (en) 2013-09-13 2017-01-24 Lg Chem, Ltd. Pouch type case, battery cell, and method of manufacturing battery cell
CN110395454A (en) * 2019-07-29 2019-11-01 苏州宏昌包装材料有限公司 A kind of mouth-sealing method of the microwave bag with exhaust structure

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