JP2001010678A - Package - Google Patents
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- JP2001010678A JP2001010678A JP11182262A JP18226299A JP2001010678A JP 2001010678 A JP2001010678 A JP 2001010678A JP 11182262 A JP11182262 A JP 11182262A JP 18226299 A JP18226299 A JP 18226299A JP 2001010678 A JP2001010678 A JP 2001010678A
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- Prior art keywords
- heat
- packaging bag
- layer
- bonding
- thermal bonding
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液状物、固形物、
あるいは、これらの混合物からなる食品等の内容物を包
装するための包装袋に関し、更に詳しくは、液状物、固
形物、あるいは、これらの混合物からなる食品等の内容
物を包装袋に収納した状態で、電子レンジにより加熱調
理することにより包装袋内に発生する蒸気等を逃がし、
包装袋の破裂、変形、および、破裂による内容物の吹き
こぼれを防止することができる包装袋に関するものであ
る。TECHNICAL FIELD The present invention relates to a liquid substance, a solid substance,
Alternatively, the present invention relates to a packaging bag for packaging the contents of foods and the like made of a mixture thereof, and more specifically, a state in which the contents of foods and the like made of a liquid substance, a solid substance, or a mixture thereof are stored in the packaging bag. Then, steam and the like generated in the packaging bag by heating and cooking with a microwave oven are released,
The present invention relates to a packaging bag capable of preventing the contents of the packaging bag from being ruptured, deformed, or ruptured.
【０００２】[0002]
【従来の技術】従来より、食べる時に電子レンジにより
袋ごと加熱調理する形式の包装袋に収納された調理済あ
るいは半調理済等の食品、たとえば、米飯（白飯、赤
飯、五目飯）、ハンバーガー、肉まん、あんまん等が市
場に出回っている。しかし、このような食品を収納する
包装袋は、電子レンジで包装袋ごと加熱すると、食品か
ら発生する蒸気や内部空気の熱膨張により包装袋の内圧
があがり、突然に包装袋が破袋し、包装袋に収納された
食品が飛散すると共に、電子レンジ内を汚すといった問
題があった。2. Description of the Related Art Conventionally, cooked or semi-cooked foods stored in a packaging bag of a type in which a bag is heated and cooked by a microwave oven at the time of eating, for example, cooked rice (white rice, red rice, gomoku rice), hamburgers, meat buns , Anman etc. are on the market. However, when the packaging bag for storing such food is heated together with the packaging bag in a microwave oven, the internal pressure of the packaging bag rises due to the steam generated from the food and the thermal expansion of the internal air, and the packaging bag is suddenly broken. There is a problem that the food stored in the packaging bag is scattered and the inside of the microwave oven is soiled.
【０００３】この問題を解決するために、電子レンジ
で加熱調理する前に、通常は予め包装袋に尖ったもので
孔を開けるなり、包装袋の一部をハサミやナイフなどで
切り取るなりして、包装袋の内圧を逃がす逃げ口を設け
ることにより包装袋が破袋するのを防止していた。しか
し、これらの内圧を逃がす方法は結構手間なものである
と同時に、加熱調理が開始されて発生した蒸気は直ちに
包装袋外へ放出され、蒸気による加熱蒸らし効果が低減
し食味が落ちるという問題があった。In order to solve this problem, before cooking by heating in a microwave oven, usually, a hole is previously formed in a packaging bag with a sharp object, and a part of the packaging bag is cut with scissors or a knife. In addition, by providing an escape opening for releasing the internal pressure of the packaging bag, the packaging bag is prevented from being broken. However, the method of releasing these internal pressures is quite troublesome, and at the same time, the steam generated when heating is started is immediately released to the outside of the packaging bag, and the steaming effect of the steam is reduced and the taste is reduced. there were.
【０００４】また、包装袋に弁構造の通気材を取り付
け、内部圧力の上昇によって弁が開き内部圧力を逃がす
構造の包装袋が考案され、上記の問題を解決すること
ができたが、この弁構造の通気材を取り付けた包装袋
は、別工程で弁構造の通気材を取り付けなければなら
ず、また、弁構造の通気材自体も構造が複雑であり、弁
構造の通気材を取り付けた包装袋はコストの高いものと
ならざるを得ず、コスト的に非常に使い辛い包装袋であ
った。Further, a packaging bag having a structure in which a ventilation material having a valve structure is attached to the packaging bag and the valve is opened to release the internal pressure by increasing the internal pressure has been devised, and the above problem can be solved. A packaging bag with a ventilation material with a structure must be fitted with a ventilation material with a valve structure in a separate process, and the ventilation material with a valve structure itself has a complicated structure. The bags had to be expensive and were very difficult to use in terms of cost.
【０００５】そこで、上記、の問題を解決するもの
として、包装袋の内層に易剥離性を有する熱接着性樹
脂層を設け、該熱接着性樹脂層で熱接着して密封した包
装袋が種々考案された。この種の包装袋は、内部圧力の
上昇によって熱接着した箇所が自動的に開口して内部圧
力を逃がすために、熱接着した箇所が開口するまでの間
は加熱蒸らし効果もあり、また、の包装袋に比べると
コスト的にも安価であり、この種の包装袋に収納された
電子レンジ対応食品が一部市場に出回っている。In order to solve the above-mentioned problem, various types of packaging bags are provided in which an inner layer of the packaging bag is provided with an easily peelable thermoadhesive resin layer, and the thermoadhesive resin layer is heat-sealed and sealed. Invented. This type of packaging bag has a heat-steaming effect until the heat-bonded part is opened because the heat-bonded part is automatically opened and the internal pressure is released by the rise of the internal pressure. It is inexpensive compared to packaging bags, and some microwave-compatible foods stored in this type of packaging bags are on the market.
【０００６】しかし、の包装袋は、内層に一般の熱接
着性樹脂層、たとえば、ポリエチレンやポリプロピレン
等と比べるとコスト高な易剥離性を有する熱接着性樹脂
層を用いるために、この易剥離性を有する熱接着性樹脂
層を必要としない部分、すなわち、包装袋の大半を占め
る部分にも使用せざるを得ず、無駄の多い使い方となっ
ていた。また、熱接着した箇所すべてが易剥離性を有す
るために、たとえば、流通時等において衝撃等の何らか
の外部圧力が加わった場合に熱接着した箇所のいずれか
の部分が剥離して内容物が遺漏することがあった。[0006] However, since the packaging bag of the present invention uses, as the inner layer, a general heat-adhesive resin layer, for example, a heat-adhesive resin layer having an easy-to-peel property which is more expensive than polyethylene, polypropylene, or the like. It has to be used in a portion that does not require a heat-adhesive resin layer having a property, that is, a portion that occupies most of the packaging bag, resulting in wasteful use. In addition, since all of the thermally bonded portions have easy peelability, for example, when some external pressure such as an impact is applied during distribution or the like, any portion of the thermally bonded portion is peeled off and the contents are leaked. There was something to do.
【０００７】[0007]
【発明が解決しようとする課題】そこで本発明は、上記
問題に鑑みてなされたものであり、まず第１の目的とす
るところは、内部圧力により自動的に開口する箇所を熱
接着部の所定部（一部）に限定することにより衝撃等の
外部圧力に対して熱接着部が剥離して内容物が遺漏する
危険性を低減することができる包装袋を提供することに
あり、その第２の目的とするところは、調理済あるいは
半調理済等の食品を完全に密封できると共に、開口部を
予め設けることなく包装袋に収納したままで電子レンジ
で蒸らし効果を奏しつつ加熱調理できる包装袋であっ
て、かつ、高まった内部圧力を包装袋の一部が自動的に
開口して逃がすことにより破裂、変形を防止できる包装
袋を安価に提供することにある。SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and a first object of the present invention is to provide a method for automatically opening a portion which is automatically opened by internal pressure to a predetermined portion of a heat bonding portion. The present invention is to provide a packaging bag capable of reducing the risk that the heat-bonded portion is peeled off by external pressure such as an impact and that the contents are leaked by being limited to a part (part). The purpose of the present invention is to provide a packaging bag that can completely seal foods, such as cooked or semi-cooked foods, and that can be heated and cooked with a steaming effect in a microwave oven while being stored in the packaging bag without providing an opening in advance. Another object of the present invention is to provide an inexpensive packaging bag capable of preventing rupture and deformation by automatically opening a part of the packaging bag and releasing the increased internal pressure.
【０００８】[0008]
【課題を解決するための手段】本発明者等は、上記のよ
うな問題点を解決すべく鋭意研究した結果、請求項１記
載の発明の包装袋は、内層に熱接着性樹脂層を有する包
装材を熱接着部で密封した包装袋において、前記熱接着
部には中芯層と該中芯層の両側に前記熱接着性樹脂層と
熱接着する熱接着層を備えると共に前記中芯層と前記熱
接着層の層間が易剥離性に構成された易剥離性テープを
介在させ、該易剥離テープ領域内で前記包装袋の内容物
収納部側に突出した突出部を有する開口予定熱接着部が
あって、該開口予定熱接着部の前記突出部に前記包装袋
を貫通する切刃もしくは切欠が形成されていることを特
徴とするものである。このように前記開口予定熱接着部
に突出部を形成したことにより、加熱調理することで高
まる内部圧力がこの突出部に集中してかかるために、こ
の突出部の前記易剥離性テープの中芯層と熱接着層との
層間から剥離が開始され、この剥離が前記突出部に設け
られた切刃もしくは切欠に到達して内部圧力を逃がすこ
とができ、包装袋の破裂、変形を防止できると共に、剥
離が開始されてからこの剥離が切刃もしくは切欠に到達
するまでの間は、包装袋内に収納された食品を蒸らすこ
とができる。また、本発明の包装袋は、易剥離性テープ
を使用するために、包装袋の内層に易剥離性を有する熱
接着性樹脂層を設けたの包装袋と比べて安価な包装袋
とすることができると共に、易剥離部が限定されるため
に流通時等において衝撃等の何らかの外部圧力が加わっ
た場合においてもの包装袋と比べて内容物の遺漏等の
危険性を低減することができる。The present inventors have made intensive studies to solve the above problems, and as a result, the packaging bag according to the first aspect of the present invention has a heat-adhesive resin layer as an inner layer. In a packaging bag in which a packaging material is sealed with a heat bonding portion, the heat bonding portion includes a core layer and a heat bonding layer on both sides of the core layer, the heat bonding layer being thermally bonded to the heat bonding resin layer. And a heat-bonding layer between the heat-bonding layer and the heat-bonding layer. And a cutting edge or notch that penetrates the packaging bag is formed at the protruding portion of the thermal adhesive portion to be opened. Since the protruding portion is formed in the thermal bonding portion to be opened in this way, the internal pressure which is increased by heating and cooking is concentrated on the protruding portion, and thus the center of the easily peelable tape of the protruding portion is formed. Peeling is started from the layer between the layer and the heat bonding layer, and the peeling reaches the cutting edge or notch provided in the protruding portion to allow internal pressure to escape, thereby preventing bursting and deformation of the packaging bag. During the period from the start of peeling until the peeling reaches the cutting blade or notch, the food stored in the packaging bag can be steamed. In addition, the packaging bag of the present invention uses an easily peelable tape, so that it is an inexpensive packaging bag as compared with a packaging bag having a heat-adhesive resin layer having easy peelability in the inner layer of the packaging bag. In addition, since the easily peelable portion is limited, the danger of leakage of the contents can be reduced as compared with a packaging bag when some external pressure such as impact is applied during distribution or the like.
【０００９】また、請求項２記載の発明は、請求項１記
載の包装袋において、前記突出部を有する開口予定熱接
着部が前記易剥離性テープの一方の熱接着層と前記包装
袋の一方の熱接着性樹脂層とを熱接着することにより形
成された第１開口予定熱接着部と、前記易剥離性テープ
の他方の熱接着層と前記包装袋の他方の熱接着性樹脂層
とを熱接着することにより形成された第２開口予定熱接
着部とからなり、前記第１開封予定熱接着部または前記
第２開封予定熱接着部のいずれか一方が前記易剥離性テ
ープの全幅に亘って熱接着された開口予定熱接着部から
なることを特徴とするものである。このように構成する
ことにより、加熱調理することで高まる内部圧力がこの
突出部に、より一層集中するために、低い内部圧力で剥
離が開始されるために加熱料理中の消費者により安心感
を与えることができる。According to a second aspect of the present invention, in the packaging bag according to the first aspect of the present invention, the thermal bonding portion having the projecting portion has an opening to be thermally bonded to one of the thermal adhesive layer of the easily peelable tape and one of the packaging bags. A first opening scheduled thermal bonding portion formed by thermally bonding the thermal bonding resin layer to the other thermal bonding resin layer, the other thermal bonding layer of the easily peelable tape, and the other thermal bonding resin layer of the packaging bag. A second opening scheduled thermal bonding portion formed by thermal bonding, and one of the first opening scheduled thermal bonding portion or the second scheduled opening thermal bonding portion extends over the entire width of the easily peelable tape. And a heat-bonded portion to be opened. With this configuration, since the internal pressure that is increased by heating and cooking is more concentrated on the protrusions, the peeling is started at a low internal pressure, so that the consumer during the cooking can feel more secure. Can be given.
【００１０】[0010]
【発明の実施の形態】上記の本発明について、図面等を
用いて以下に更に詳しく説明する。図１は本発明にかか
る包装袋の第１の実施形態の平面図、図２は包装袋本体
を構成する包装材の層構成図、図３は図１のＸ−Ｘ線の
断面図、図４は図１のＹ−Ｙ線の断面図、図５は本発明
に使用する易剥離性テープの層構成図、図６は図３の加
熱調理途中のＸーＸ線の断面図、図７は本発明にかかる
包装袋の第２の実施形態の図３に対応する断面図、図８
は本発明にかかる包装袋の第２の実施形態の図４に対応
する断面図であり、図中の１，1'は包装袋、２は易剥離
性テープ、３は切欠、10は熱接着部、20，25は開口予定
熱接着部、21，23は熱接着層、22は中芯層、50は包装
材、51は内層、52は外層をそれぞれ示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings and the like. FIG. 1 is a plan view of a first embodiment of a packaging bag according to the present invention, FIG. 2 is a layer configuration diagram of a packaging material constituting a packaging bag body, and FIG. 3 is a cross-sectional view taken along line XX of FIG. 4 is a cross-sectional view taken along line YY of FIG. 1, FIG. 5 is a layer configuration diagram of the easily peelable tape used in the present invention, FIG. 6 is a cross-sectional view taken along line XX of FIG. FIG. 8 is a sectional view corresponding to FIG. 3 of the second embodiment of the packaging bag according to the present invention, and FIG.
FIG. 5 is a cross-sectional view corresponding to FIG. 4 of a second embodiment of a packaging bag according to the present invention, in which 1, 1 ′ is a packaging bag, 2 is an easily peelable tape, 3 is a cutout, and 10 is a thermal bond. Reference numerals, 20 and 25 denote thermal bonding portions to be opened, 21 and 23 denote thermal bonding layers, 22 denotes a core layer, 50 denotes a packaging material, 51 denotes an inner layer, and 52 denotes an outer layer.
【００１１】図１は本発明にかかる包装袋の第１の実施
形態の平面図、図２は包装袋本体を構成する包装材の層
構成図であって、包装袋１は外層52と熱接着性樹脂層で
ある内層51とからなる矩形状の包装材50を前記内層51同
士が対向するように重ね合わせ、重ね合わせた一端縁辺
に該一端縁辺に平行に該一端縁辺と外端縁が一致するよ
うに易剥離性テープ２が挿設され、該易剥離性テープ２
の領域内で包装袋の内容物収納部側に突出した略台形状
突出部を有するように開口予定熱接着部20が熱接着する
ことにより設けられると共に、他の三端縁辺も熱接着部
10により熱接着され、四端縁辺が熱接着されて密封され
た四方シールタイプの包装袋であって、前記開口予定熱
接着部20の略台形状突出部に前記包装袋を貫通する略円
形状の切欠３が形成されている。FIG. 1 is a plan view of a first embodiment of a packaging bag according to the present invention, and FIG. 2 is a layer configuration diagram of a packaging material constituting a packaging bag main body. A rectangular packaging material 50 comprising an inner layer 51 which is a conductive resin layer is overlapped so that the inner layers 51 face each other, and the one end edge and the outer edge coincide with the overlapped one end edge in parallel with the one end edge. The easily peelable tape 2 is inserted so that the
The thermal bonding portion 20 to be opened is provided by thermally bonding so as to have a substantially trapezoidal projection protruding toward the content storage portion side of the packaging bag in the area of the packaging bag, and the other three edges are also thermally bonded.
This is a four-sided seal type packaging bag which is thermally bonded by 10 and the four edges are thermally bonded and sealed, and has a substantially circular shape penetrating the packaging bag through a substantially trapezoidal projection of the expected thermal bonding portion 20 to be opened. Notch 3 is formed.
【００１２】また、図示はしないが包装袋１の中には、
たとえば、米飯（白飯、赤飯、五目飯）、ハンバーガ
ー、肉まん、あんまん等の食品が収納されていて、該食
品を食べる時に包装袋ごと電子レンジで所定時間加熱調
理するタイプのものである。Although not shown, the packaging bag 1 contains
For example, it is of a type in which foods such as cooked rice (white rice, red rice, fifth rice), hamburgers, meat buns, anman buns, etc. are stored, and when the foods are eaten, the whole packaging bag is heated and cooked for a predetermined time in a microwave oven.
【００１３】図３は図１のＸ−Ｘ線の断面図、図４は図
１のＹ−Ｙ線の断面図であって、易剥離性テープ２が包
装袋１の袋本体を構成する包装材50の間に挿入されると
共に、易剥離性テープ２の中芯層22の両側に設けられた
熱接着層21、23と前記包装材50の内層51とがそれぞれ熱
接着されて略台形状突出部を有する開口予定熱接着部20
を形成し、前記開口予定熱接着部20の略台形状突出部に
略円形状の切欠３が設けられている。FIG. 3 is a sectional view taken along line XX of FIG. 1, and FIG. 4 is a sectional view taken along line YY of FIG. The heat bonding layers 21 and 23 provided on both sides of the core layer 22 of the easily peelable tape 2 and the inner layer 51 of the packaging material 50 are respectively heat bonded to each other while being inserted between the materials 50 so as to be substantially trapezoidal. Expected opening thermal bonding portion 20 having a projection
A substantially circular notch 3 is provided in a substantially trapezoidal projection of the thermal bonding portion 20 to be opened.
【００１４】このように構成された包装袋１は、易剥離
性テープ２を設けた開口予定熱接着部20のみが易剥離性
に構成され、これ以外の他の熱接着部10は強固に熱接着
されているために、上記の包装袋に比べて流通時等に
おいて衝撃等の何らかの外部圧力が加わった場合におい
ても内容物が遺漏する危険性を低減することができると
共に、易剥離性に構成する箇所を易剥離性テープ２で形
成するようにしたことにより上記の包装袋に比べて易
剥離性材料の使用量を大幅に減らすことができ、それだ
け安価にすることができる。In the packaging bag 1 configured as described above, only the scheduled thermal bonding portion 20 provided with the easily peelable tape 2 is configured to be easily peelable, and the other thermal bonding portion 10 other than this is strongly heat-bonded. Due to the adhesion, the danger of leakage of the contents can be reduced even when some external pressure such as an impact is applied at the time of distribution or the like as compared to the above-mentioned packaging bag, and the structure is easily peelable. By using the easy-peeling tape 2 to form the portion to be used, the amount of the easy-peeling material used can be significantly reduced as compared with the above-mentioned packaging bag, and the cost can be reduced accordingly.
【００１５】図５は本発明に使用する易剥離性テープの
層構成図であって、易剥離性テープ２は中芯層22の両側
に熱接着層21、23を形成した構成からなると共に、前記
中芯層22と前記熱接着層21、23の層間が易剥離性に構成
されている。このような易剥離性テープ２は前記中芯層
22を形成する樹脂と前記熱接着層21、23を形成する樹脂
とを適宜選択することにより作製することができる。FIG. 5 is a diagram showing the layer structure of the easily peelable tape used in the present invention. The easily peelable tape 2 has a structure in which heat bonding layers 21 and 23 are formed on both sides of a core layer 22. The interlayer between the core layer 22 and the heat bonding layers 21 and 23 is configured to be easily peelable. Such an easy-peeling tape 2 is formed by the above-mentioned core layer.
It can be manufactured by appropriately selecting the resin forming the 22 and the resin forming the thermal bonding layers 21 and 23.
【００１６】ところで、前記熱接着層21、23は包装袋本
体を構成する包装材50の内層51と熱接着可能な層である
必要があり、包装袋本体を構成する包装材50の内層51に
用いる熱接着性樹脂により決まるものであるが、前記包
装材50の内層51に用いる熱接着性樹脂が備える必要のあ
る物性としては、電子レンジで包装袋ごと加熱調理でき
ることが大前提であり、少なくとも耐熱性に優れたもの
であることが必要であり、コスト等を勘案するとポリエ
チレン系樹脂ないしポリプロピレン系樹脂が適当である
が、電子レンジで加熱調理する食品は一般に油性食品が
多く耐油性においても優れていることを勘案すると前記
包装材50の内層51に用いる熱接着性樹脂としてはポリプ
ロピレン系樹脂がより好適であり、当然のことであるが
前記熱接着層21、23もポリプロピレン系樹脂ということ
になる。The thermal bonding layers 21 and 23 need to be layers that can be thermally bonded to the inner layer 51 of the packaging material 50 constituting the packaging bag main body. Although it is determined by the heat-adhesive resin used, the physical properties that the heat-adhesive resin used for the inner layer 51 of the packaging material 50 needs to be provided are based on the premise that it can be cooked together with the packaging bag in a microwave oven. It is necessary to be excellent in heat resistance, and polyethylene resin or polypropylene resin is suitable in consideration of cost etc., but foods cooked in a microwave oven are generally oily foods and have excellent oil resistance. In consideration of the above, a polypropylene-based resin is more preferable as the heat-adhesive resin used for the inner layer 51 of the packaging material 50, and it goes without saying that the heat-adhesive layers 21 and 23 are It comes to propylene-based resin.
【００１７】そこで、前記易剥離性テープ２の層構成を
より具体的に説明すると、前記中芯層22にポリエチレン
系樹脂を用い、前記熱接着層21、23にポリプロピレン系
樹脂を用いたものを挙げることができる。前記中芯層22
に用いるポリエチレン系樹脂としては、たとえば、高圧
法低密度ポリエチレン、直鎖状低密度ポリエチレン、中
密度ポリエチレンおよび高密度ポリエチレン等のいずれ
のエチレン単独重合体を使用することができる他に、プ
ロピレン、ブテン−１、ペンテン−１、３−メチルブテ
ン−１、４−メチルペンテン−１などのα−オレフィ
ン、または、酢酸ビニルとの結晶性、あるいは、低結晶
性ないし非結晶性のランダムもしくはブロック共重合
体、あるいは、これらの混合物などを挙げることができ
る。Therefore, the layer structure of the easily peelable tape 2 will be described in more detail. A tape in which a polyethylene resin is used for the core layer 22 and a polypropylene resin is used for the heat bonding layers 21 and 23 is described. Can be mentioned. The core layer 22
Examples of the polyethylene-based resin used include, for example, any of ethylene homopolymers such as high-pressure low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene, as well as propylene and butene. Α-olefins such as -1, pentene-1, 3-methylbutene-1, and 4-methylpentene-1, or crystalline or low-crystalline or non-crystalline random or block copolymers with vinyl acetate Or a mixture thereof.
【００１８】また、前記熱接着層21、23に用いるポリプ
ロピレン系樹脂としては、たとえば、高結晶性のプロピ
レン単独重合体の他に、エチレン、ブテン−１、ペンテ
ン−１、３−メチルブテン−１、４−メチルペンテン−
１などのα−オレフィンとのランダム共重合体やこれら
の混合物などを挙げることができる。なお、ランダム共
重合体としては、多段重合で得られるホモポリプロピレ
ンとの混合物であってもよい。The polypropylene resin used for the heat bonding layers 21 and 23 includes, for example, ethylene, butene-1, pentene-1, pentene-1, 3-methylbutene-1, 4-methylpentene
And a random copolymer with an α-olefin such as 1, or a mixture thereof. The random copolymer may be a mixture with a homopolypropylene obtained by multi-stage polymerization.
【００１９】そして、前記易剥離性テープ２は、通常、
上記で説明した樹脂を周知の共押出し法で３層同時に押
し出すことにより作製され、各層間、すなわち、前記熱
接着層21と前記中芯層22との層間および前記中芯層22と
前記熱接着層23との層間が易剥離性を有するように構成
される。前記易剥離性テープ２を構成する各層の厚さは
任意であるが、前記易剥離性テープ２の総厚としては、
加工適正、コスト等を勘案すると20〜70μｍが適当であ
る。なお、包装袋１に収納される食品が油性食品ではな
く耐油性を必要としない場合においては、包装袋１に用
いられる包装袋本体を構成する包装材50の内層51はポリ
エチレン系樹脂であってもよく、この場合は当然のこと
ながら、前記易剥離性テープ２を構成する中芯層22はポ
リプロピレン系樹脂、熱接着層21、23はポリエチレン系
樹脂ということになる。この場合においても、上記同様
に各層間が易剥離性を有するように構成される。The easily peelable tape 2 is usually
The resin described above is manufactured by simultaneously extruding three layers by a well-known co-extrusion method, and is formed between each layer, that is, between the heat bonding layer 21 and the core layer 22 and between the core layer 22 and the heat bonding layer. The layer 23 and the layer 23 are configured to have easy peelability. The thickness of each layer constituting the easily peelable tape 2 is arbitrary, but as a total thickness of the easily peelable tape 2,
In consideration of processing adequacy, cost, etc., 20 to 70 μm is appropriate. When the food stored in the packaging bag 1 is not an oily food and does not require oil resistance, the inner layer 51 of the packaging material 50 constituting the packaging bag body used for the packaging bag 1 is made of polyethylene resin. In this case, it goes without saying that the core layer 22 constituting the easily peelable tape 2 is made of a polypropylene resin, and the heat bonding layers 21 and 23 are made of a polyethylene resin. Also in this case, similarly to the above, each layer is configured to have easy peelability.
【００２０】次に、包装袋１の袋本体を構成する包装材
50について説明する。図２に示すように包装材50は外層
52と内層51との積層体であって、いずれの層を構成する
材料も電子レンジを用いて加熱調理するためにマイクロ
波を透過するものを用いる必要がある以外は包装袋１に
求められる諸物性を満足できればよいのであって、包装
袋１に収納される食品により適宜決めればよい。外層52
としては、包装袋１を構成する基本素材となることか
ら、機械的、物理的、化学的等において優れた性質を有
する合成樹脂を用いることができ、たとえば、ポリエス
テル、ポリアミド、ポリプロピレン、ポリカーボネー
ト、ポリアセタール等の樹脂からなる合成樹脂製フィル
ムを用いることができ、未延伸フィルムあるいは１軸方
向または２軸方向に延伸したフィルムのいずれのもので
も使用することができ、フィルムの厚さとしては基本素
材としての強度、剛性などについて必要最低限に保持さ
れ得る厚さであればよく、コストを勘案すると12〜30μ
ｍ程度が適当である。前記合成樹脂製フィルムは、必要
に応じてポリ塩化ビニリデンが塗工されたフィルムや酸
化珪素や酸化アルミニウム等の無機物の蒸着層が形成さ
れたフィルムとしてバリアー性を有する構成としてもよ
い。また、前記外層52として使用する合成樹脂製フィル
ムは、一般的に前記合成樹脂製フィルムの内層51側に印
刷が施されることが多いために、前記外層52として使用
する合成樹脂製フィルムは印刷適性が求められ、１軸方
向ないし２軸方向に延伸した延伸フィルムが好適であ
る。Next, the packaging material constituting the bag body of the packaging bag 1
50 will be described. As shown in FIG. 2, the packaging material 50 is an outer layer.
A laminated body of the inner layer 51 and the inner layer 51, except that it is necessary to use a material that transmits microwaves for heating and cooking using a microwave oven. It suffices if the physical properties can be satisfied, and it may be appropriately determined according to the food stored in the packaging bag 1. Outer layer 52
As a basic material constituting the packaging bag 1, a synthetic resin having excellent properties in mechanical, physical, chemical and the like can be used. For example, polyester, polyamide, polypropylene, polycarbonate, polyacetal It is possible to use a synthetic resin film made of a resin such as a non-stretched film or a uniaxially or biaxially stretched film. It is sufficient if the thickness can be held to the minimum necessary for strength, rigidity, etc., and considering the cost, 12 to 30μ
About m is appropriate. The synthetic resin film may have a barrier property as a film coated with polyvinylidene chloride or a film formed with a deposited layer of an inorganic substance such as silicon oxide or aluminum oxide as necessary. Further, since the synthetic resin film used as the outer layer 52 is generally printed on the inner layer 51 side of the synthetic resin film in many cases, the synthetic resin film used as the outer layer 52 is printed. Suitability is required, and a stretched film stretched in a uniaxial or biaxial direction is preferred.
【００２１】また、前記包装材50の内層51としては、上
記で説明した理由により、ポリエチレン系樹脂ないしポ
リプロピレン系樹脂が適当である。またさらに、本発明
においては、前記内層51と前記外層52との間に中間層
（図示せず）を設けてもよく、前記中間層（図示せず）
は、通常、前記内層51と前記外層52だけでは包装袋１と
しての機能を十分に果たすことができない場合等に設け
られる。前記機能としては、気体遮断性、機械的強靱
性、耐屈曲性、耐突き刺し性、耐衝撃性、耐寒性、耐薬
品性等であり、包装袋１として要求されるこれらの最終
的な機能を前記中間層（図示せず）を設けることで達成
するものである。前記中間層（図示せず）として用いら
れる材料としては、たとえば、ポリエステル、ポリアミ
ド、ポリエチレン，ポリプロピレン等のポリオレフィ
ン、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリカーボ
ネート、ポリアセタール、ポリビニルアルコール、エチ
レン−プロピレン共重合体、エチレン−酢酸ビニル共重
合体ケン化物等の樹脂、ないし、これらの樹脂からなる
合成樹脂製フィルム、あるいは、これらのフィルムに適
宜ポリ塩化ビニリデンを塗工したフィルムや酸化アルミ
ニウム、酸化珪素等の無機物の蒸着層が形成されたフィ
ルムとしてバリアー性を持たせた構成とすることもで
き、また、これらの材料は適宜組み合わせて使用するこ
とができる。なお、前記中間層（図示せず）の厚さとし
ては、包装袋１として要求される機能を満たすことがで
きれば良いのであって、必要に応じて適宜選ぶことがで
きる。As the inner layer 51 of the packaging material 50, a polyethylene resin or a polypropylene resin is suitable for the reason described above. Still further, in the present invention, an intermediate layer (not shown) may be provided between the inner layer 51 and the outer layer 52, and the intermediate layer (not shown)
Is usually provided when the inner layer 51 and the outer layer 52 alone cannot sufficiently function as the packaging bag 1. The functions include gas barrier properties, mechanical toughness, bending resistance, puncture resistance, impact resistance, cold resistance, chemical resistance, and the like. These final functions required for the packaging bag 1 are described below. This is achieved by providing the intermediate layer (not shown). Examples of the material used as the intermediate layer (not shown) include polyester, polyamide, polyolefin such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polyacetal, polyvinyl alcohol, ethylene-propylene copolymer, Resins such as saponified ethylene-vinyl acetate copolymer, or synthetic resin films made of these resins, or films obtained by appropriately coating these films with polyvinylidene chloride, aluminum oxide, inorganic oxides such as silicon oxide, etc. The film having the vapor-deposited layer formed thereon may have a barrier property, and these materials may be used in appropriate combination. The thickness of the intermediate layer (not shown) is not particularly limited as long as the function required for the packaging bag 1 can be satisfied, and can be appropriately selected as needed.
【００２２】そして、前記包装材50は、前記外層52、前
記内層51、あるいは、必要に応じて前記中間層（図示せ
ず）を周知のドライラミネーション法、Ｔダイ押出し法
等を適宜用いて貼り合わせることにより得ることができ
る。また、必要に応じて、コロナ放電処理やアンカーコ
ート剤を塗工することもできる。The wrapping material 50 is attached to the outer layer 52, the inner layer 51 or, if necessary, the intermediate layer (not shown) by using a well-known dry lamination method, a T-die extrusion method or the like. It can be obtained by combining them. If necessary, a corona discharge treatment or an anchor coating agent can be applied.
【００２３】次に、本発明の包装袋１の内部圧力を逃が
す機構について説明する。図６は図３の加熱調理途中の
ＸーＸ線の断面図であって、米飯、ハンバーガー、肉ま
ん、あんまん等の食品（図示せず）が収納された包装袋
１を電子レンジに入れて加熱調理すると、食品中から発
生する蒸気や包装袋内の空気が熱膨張して内部圧力Ｆが
高まり包装袋１はパンパンに膨れた状態になる一方で、
内部圧力Ｆにより包装袋１の一端縁辺に易剥離性テープ
２を挿設して設けられた開口予定熱接着部20の略台形状
突出部で前記易剥離性テープ２の熱接着層21ないし23の
いずれかがネギレＡ（図６においては熱接着層21がネギ
レ）し、該ネギレＡが中芯層22と熱接着層21ないし23の
いずれかの層間（図６においては熱接着層21と中芯層22
との層間）に至って、図６（ａ）に示すように前記中芯
層22と熱接着層21との層間を剥離する。最終的には図６
（ｂ）に示すように、包装袋１は前記開口予定熱接着部
20の略台形状突出部の前記中芯層22と熱接着層21との層
間の剥離が切欠３に達して内部圧力Ｆを逃がし、包装袋
１の破袋が防止される。なお、前記開口予定熱接着部20
の略台形状突出部の前記易剥離性テープ２の熱接着層21
ないし23のいずれかに生じたネギレＡ（図６においては
熱接着層21がネギレ）および中芯層22と熱接着層21ない
し23のいずれかの層間（図６においては熱接着層21と中
芯層22との層間）の剥離が前記切欠３に達するまでの
間、包装袋１に収納された食品を蒸らすことができるた
めに、より良い食味を得ることができる。このように包
装袋１の開口予定熱接着部20を略台形状突出部を有する
ように構成したことにより、内部圧力がこの略台形状突
出部に集中してかかることになり、この略台形状突出部
以外の前記開口予定熱接着部20より速く剥離が進行す
る。Next, a mechanism for releasing the internal pressure of the packaging bag 1 of the present invention will be described. FIG. 6 is a cross-sectional view taken along the line XX of FIG. 3 during heating and cooking. The packaging bag 1 containing food (not shown) such as cooked rice, hamburger, meat bun, and bun is placed in a microwave oven and heated. When cooking, the steam generated from the food and the air in the packaging bag are thermally expanded, the internal pressure F is increased, and the packaging bag 1 is in a state of being swollen into a bread pan.
Due to the internal pressure F, the thermal adhesive layers 21 to 23 of the easily peelable tape 2 are formed at the substantially trapezoidal projections of the thermal adhesive portion 20 to be opened which are provided by inserting the easily peelable tape 2 at one edge of the packaging bag 1. Is a crepe A (in FIG. 6, the heat bonding layer 21 is a crepe), and the crepe A is between the core layer 22 and any one of the heat bonding layers 21 to 23 (in FIG. Core layer 22
6A), the interlayer between the core layer 22 and the heat bonding layer 21 is peeled off as shown in FIG. Eventually Figure 6
As shown in (b), the packaging bag 1 is provided with the heat-sealed portion to be opened.
The peeling between the intermediate layer 22 and the heat bonding layer 21 of the approximately trapezoidal protrusion 20 reaches the notch 3 to release the internal pressure F, thereby preventing the packaging bag 1 from breaking. The opening scheduled thermal bonding portion 20
The heat-adhesive layer 21 of the easily peelable tape 2 having a substantially trapezoidal protrusion
To 23 (in FIG. 6, the thermal bonding layer 21 is a negative), and between the core layer 22 and any of the thermal bonding layers 21 to 23 (in FIG. 6, the thermal bonding layer 21 and the intermediate layer). Until the separation between the core layer 22 and the core layer 22 reaches the notch 3, the food stored in the packaging bag 1 can be steamed, so that a better taste can be obtained. Since the opening scheduled thermal bonding portion 20 of the packaging bag 1 is configured to have the substantially trapezoidal protrusion, the internal pressure is concentrated on the substantially trapezoidal protrusion, and the substantially trapezoidal shape is formed. The peeling progresses faster than the opening thermal bonding portion 20 other than the projecting portion.
【００２４】図７は本発明にかかる包装袋の第２の実施
形態の図３に対応する断面図、図８は本発明にかかる包
装袋の第２の実施形態の図４に対応する断面図であっ
て、包装袋１’は、図７、８に示すように易剥離性テー
プ２の一方の面（図においては熱接着層21側）が包装袋
本体の内層51と全面に亘って熱接着された開口予定熱接
着部25を形成し、易剥離性テープ２の他方の面（図にお
いては熱接着層23側）が図１に示すように略台形状突出
部を有する開口予定熱接着部20を形成したものであっ
て、前記開口予定熱接着部20の略台形状突出部に略円形
状切欠３が形成されている以外は第１の実施形態と同じ
でであり説明は省略するが、このように構成することに
より、第１の実施形態よりも内部圧力Ｆは前記開口予定
熱接着部20の略台形状突出部に一層集中してかかるため
に、図示はしないが第１の実施形態よりも低い内部圧力
でも前記開口予定熱接着部20の略台形状突出部で易剥離
性テープ２の熱接着層23がネギレし、このネギレが前記
易剥離性テープ２の中芯層22と熱接着層23の層間へ至っ
て前記中芯層22と前記熱接着層23の層間を剥離し、この
剥離が切欠３に達して内部圧力を逃がし、包装袋１’の
破袋が防止される。FIG. 7 is a sectional view corresponding to FIG. 3 of a second embodiment of the packaging bag according to the present invention, and FIG. 8 is a sectional view corresponding to FIG. 4 of the second embodiment of the packaging bag according to the present invention. As shown in FIGS. 7 and 8, one side of the easily peelable tape 2 (in the figure, the side of the heat bonding layer 21) is thermally wrapped with the inner layer 51 of the main body of the packaging bag. A scheduled opening thermal bonding portion 25 is formed, and the other surface of the easily peelable tape 2 (the side of the thermal bonding layer 23 in the figure) has a substantially trapezoidal projection as shown in FIG. The second embodiment is the same as the first embodiment except that a substantially circular cutout 3 is formed in a substantially trapezoidal projection of the thermal bonding portion 20 to be opened. However, with such a configuration, the internal pressure F is higher than that of the first embodiment. Although not shown, even if the internal pressure is lower than that of the first embodiment, the thermal adhesive layer 23 of the easily peelable tape 2 is not formed at the substantially trapezoidal protrusion of the thermal adhesive portion 20 to be opened. The nappe reaches the layer between the core layer 22 and the thermal bonding layer 23 of the easily peelable tape 2 and separates the layer between the core layer 22 and the thermal bonding layer 23. The pressure is released to prevent the packaging bag 1 'from being broken.
【００２５】ところで、今までの説明においては、開口
予定熱接着部20の突出部を略台形状としてきたが、これ
にこだわることはなく、切欠ないし切刃が形成可能な突
出部であればよいのであって、たとえば、略半円形状、
略楕円形状、三角形等の多角形状等いかなる形状であっ
てもよい。また、切欠についても略円形状としてきた
が、これについてもこれに限るものでない。また、切刃
については説明をしなかったが、これについても、たと
えば、−（マイナス）形状、＋（プラス）形状、略半円
形状、略舟型形状等の形状を適宜とることができ、その
個数についても１個に限ることはなく複数戸であっても
構わない。In the above description, the projecting portion of the thermal bonding portion 20 to be opened has a substantially trapezoidal shape. However, the present invention is not limited to this, and any projecting portion that can form a notch or a cutting blade may be used. And, for example, a substantially semicircular shape,
Any shape such as a substantially elliptical shape or a polygonal shape such as a triangle may be used. Also, the notch has been described as having a substantially circular shape, but this is not restrictive. Further, although the cutting blade has not been described, for example, it is possible to appropriately take a shape such as a − (minus) shape, a + (plus) shape, a substantially semicircular shape, a substantially boat shape, and the like. The number is not limited to one, but may be plural.
【００２６】[0026]
【発明の効果】本発明の包装袋は、今まで縷々説明して
きたように、内部圧力により自動的に開口する箇所を易
剥離性テープを挿設した熱接着部に限定することによ
り、衝撃等の外部圧力に対して熱接着部が剥離して内容
物が遺漏する危険性を低減することができると共に、内
部圧力により自動的に開口する箇所を剥離テープを挿設
して形成することにより包装袋のコストを安価にするこ
とができる。また、調理済あるいは半調理済等の食品を
完全に密封できると共に、開口部を予め設けることなく
包装袋に収納したままで電子レンジで蒸らし効果を奏し
つつ加熱調理でき、また、高まった内部圧力を包装袋の
一部が自動的に開口して逃がすことにより破裂、変形を
防止できるという効果を奏するものである。As described so far, the packaging bag of the present invention has an impact or the like by limiting the portion that is automatically opened by the internal pressure to the heat-bonded portion where the easily peelable tape is inserted. In addition to reducing the risk that the heat-bonded part peels off due to the external pressure of the contents and the contents leak, the part that opens automatically due to the internal pressure is formed by inserting a release tape and packaging. The cost of the bag can be reduced. In addition, cooked or semi-cooked foods can be completely sealed, and can be cooked with the effect of steaming in a microwave oven while being stored in a packaging bag without providing an opening in advance. Is automatically opened and partially released to prevent the rupture and deformation of the packaging bag.
【図１】 本発明にかかる包装袋の第１の実施形態の平
面図である。FIG. 1 is a plan view of a first embodiment of a packaging bag according to the present invention.
【図２】 包装袋本体を構成する包装材の層構成図であ
る。FIG. 2 is a layer configuration diagram of a packaging material constituting a packaging bag body.
【図３】 図１のＸ−Ｘ線の断面図である。FIG. 3 is a sectional view taken along line XX of FIG. 1;
【図４】 図１のＹ−Ｙ線の断面図である。FIG. 4 is a sectional view taken along line YY of FIG. 1;
【図５】 本発明に使用する易剥離性テープの層構成図
である。FIG. 5 is a diagram showing a layer structure of an easily peelable tape used in the present invention.
【図６】 図３の加熱調理途中のＸーＸ線の断面図であ
る。6 is a cross-sectional view taken along line XX of FIG. 3 during heating and cooking.
【図７】 本発明にかかる包装袋の第２の実施形態の図
３に対応する断面図である。FIG. 7 is a sectional view corresponding to FIG. 3 of a second embodiment of the packaging bag according to the present invention.
【図８】 本発明にかかる包装袋の第２の実施形態の図
４に対応する断面図である。FIG. 8 is a sectional view corresponding to FIG. 4 of a second embodiment of the packaging bag according to the present invention.
１，1' 包装袋 ２ 易剥離性テープ ３ 切欠 10 熱接着部 20，25 開口予定熱接着部 21，23 熱接着層 22 中芯層 50 包装材 51 内層 52 外層 1,1 'Packaging bag 2 Easy-peeling tape 3 Notch 10 Thermal bonding part 20,25 Expected thermal bonding part 21,23 Thermal bonding layer 22 Core layer 50 Packaging material 51 Inner layer 52 Outer layer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3E064 AA05 BA22 BB03 BC18 EA30 FA01 FA04 FA05 HD02 HD10 HE02 HN06 3E067 AA01 AA11 AB01 BA12A BB14A CA24 EA09 EE48 GA30 GD08 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AA05 BA22 BB03 BC18 EA30 FA01 FA04 FA05 HD02 HD10 HE02 HN06 3E067 AA01 AA11 AB01 BA12A BB14A CA24 EA09 EE48 GA30 GD08
Claims (2)
熱接着部で密封した包装袋において、前記熱接着部には
中芯層と該中芯層の両側に前記熱接着性樹脂層と熱接着
する熱接着層を備えると共に前記中芯層と前記熱接着層
の層間が易剥離性に構成された易剥離性テープを介在さ
せ、該易剥離テープ領域内で前記包装袋の内容物収納部
側に突出した突出部を有する開口予定熱接着部があっ
て、該開口予定熱接着部の前記突出部に前記包装袋を貫
通する切刃もしくは切欠が形成されていることを特徴と
する包装袋。1. A packaging bag in which a packaging material having a heat-adhesive resin layer as an inner layer is sealed with a heat-adhesion portion, wherein the heat-adhesion portion has a core layer and the heat-adhesion resin layers on both sides of the core layer. A heat-bonding layer for heat-bonding the core bag and a heat-bonding layer between the core layer and the heat-bonding layer. There is a pre-opening thermal bonding portion having a protruding portion protruding toward the storage portion side, and a cutting blade or notch penetrating the packaging bag is formed in the protruding portion of the pre-opening thermal bonding portion. Packaging bag.
前記易剥離性テープの一方の熱接着層と前記包装袋の一
方の熱接着性樹脂層とを熱接着することにより形成され
た第１開口予定熱接着部と、前記易剥離性テープの他方
の熱接着層と前記包装袋の他方の熱接着性樹脂層とを熱
接着することにより形成された第２開口予定熱接着部と
からなり、前記第１開口予定熱接着部または前記第２開
口予定熱接着部のいずれか一方が前記易剥離性テープの
全幅に亘って熱接着された開口予定熱接着部からなるこ
とを特徴とする請求項１記載の包装袋。2. A second heat-bondable portion having an opening is formed by heat-bonding one heat-bonding layer of the easily peelable tape to one heat-bonding resin layer of the packaging bag. One opening scheduled thermal bonding portion and a second scheduled opening thermal bonding portion formed by thermally bonding the other thermal bonding layer of the easily peelable tape and the other thermal bonding resin layer of the packaging bag. In this case, one of the first scheduled thermal bonding portion and the second scheduled thermal bonding portion is formed of a scheduled thermal bonding portion that is thermally bonded over the entire width of the easily peelable tape. The packaging bag according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18226299A JP4202535B2 (en) | 1999-06-28 | 1999-06-28 | Packaging bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18226299A JP4202535B2 (en) | 1999-06-28 | 1999-06-28 | Packaging bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001010678A true JP2001010678A (en) | 2001-01-16 |
| JP4202535B2 JP4202535B2 (en) | 2008-12-24 |
Family
ID=16115187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18226299A Expired - Fee Related JP4202535B2 (en) | 1999-06-28 | 1999-06-28 | Packaging bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4202535B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005009869A1 (en) | 2003-07-24 | 2005-02-03 | Toppan Printing Co., Ltd. | Packaging bag with steam releasing function and packaging body using the packaging bag |
| JP2010126241A (en) * | 2008-11-28 | 2010-06-10 | Kyodo Printing Co Ltd | Laminated film, laminated tape, and packaging bag using the same for heating by microwave oven |
| WO2015166590A1 (en) * | 2014-05-01 | 2015-11-05 | 株式会社カナオカ | Microwaveable packaging bag |
| JP2016166035A (en) * | 2015-03-10 | 2016-09-15 | 東レフィルム加工株式会社 | Easily openable bag forming article |
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|---|---|---|---|---|
| JPH08253272A (en) * | 1995-03-17 | 1996-10-01 | Toyo Alum Kk | Package |
| JPH09286471A (en) * | 1996-02-22 | 1997-11-04 | Toyo Alum Kk | Packaging bag |
| JPH1059433A (en) * | 1996-08-13 | 1998-03-03 | Meiwa Packs:Kk | Packaging bag having automatic pressure adjusting function |
| JPH10101154A (en) * | 1996-09-30 | 1998-04-21 | Sun A Kaken Co Ltd | Packaging bag for heat treatment |
| JPH10264977A (en) * | 1997-03-26 | 1998-10-06 | Toyo Alum Kk | Packaging bag |
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1999
- 1999-06-28 JP JP18226299A patent/JP4202535B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08253272A (en) * | 1995-03-17 | 1996-10-01 | Toyo Alum Kk | Package |
| JPH09286471A (en) * | 1996-02-22 | 1997-11-04 | Toyo Alum Kk | Packaging bag |
| JPH1059433A (en) * | 1996-08-13 | 1998-03-03 | Meiwa Packs:Kk | Packaging bag having automatic pressure adjusting function |
| JPH10101154A (en) * | 1996-09-30 | 1998-04-21 | Sun A Kaken Co Ltd | Packaging bag for heat treatment |
| JPH10264977A (en) * | 1997-03-26 | 1998-10-06 | Toyo Alum Kk | Packaging bag |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005009869A1 (en) | 2003-07-24 | 2005-02-03 | Toppan Printing Co., Ltd. | Packaging bag with steam releasing function and packaging body using the packaging bag |
| JPWO2005009869A1 (en) * | 2003-07-24 | 2006-10-05 | 凸版印刷株式会社 | Packaging bag having steam venting function and packaging body using the same |
| JP4586728B2 (en) * | 2003-07-24 | 2010-11-24 | 凸版印刷株式会社 | Packaging bag having steam venting function and packaging body using the same |
| US8777486B2 (en) | 2003-07-24 | 2014-07-15 | Toppan Printing Co., Ltd. | Packaging bag with steam venting function and package using the packaging bag |
| JP2010126241A (en) * | 2008-11-28 | 2010-06-10 | Kyodo Printing Co Ltd | Laminated film, laminated tape, and packaging bag using the same for heating by microwave oven |
| WO2015166590A1 (en) * | 2014-05-01 | 2015-11-05 | 株式会社カナオカ | Microwaveable packaging bag |
| JP2016166035A (en) * | 2015-03-10 | 2016-09-15 | 東レフィルム加工株式会社 | Easily openable bag forming article |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4202535B2 (en) | 2008-12-24 |
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