JP2003137303A - Packaging bag made of polyamide resin film and manufacturing method therefor - Google Patents
Packaging bag made of polyamide resin film and manufacturing method thereforInfo
- Publication number
- JP2003137303A JP2003137303A JP2001334018A JP2001334018A JP2003137303A JP 2003137303 A JP2003137303 A JP 2003137303A JP 2001334018 A JP2001334018 A JP 2001334018A JP 2001334018 A JP2001334018 A JP 2001334018A JP 2003137303 A JP2003137303 A JP 2003137303A
- Authority
- JP
- Japan
- Prior art keywords
- packaging bag
- bag
- polyamide resin
- resin film
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Bag Frames (AREA)
- Packages (AREA)
- Making Paper Articles (AREA)
- Wrappers (AREA)
- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、青果物のような水
分を多く含む内容物用の包装袋であり、水分を適切に包
装外に排出することで包装内に水分がたまることを防
ぎ、内容物の品質の劣化を抑える包装袋に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for contents containing a large amount of water such as fruits and vegetables, which prevents moisture from accumulating inside the package by appropriately discharging the water outside the package. The present invention relates to a packaging bag that suppresses deterioration of product quality.
【０００２】[0002]
【従来の技術】食品、青果物、花卉などの水分を多く含
み、かつその水分が原因で腐敗やカビなどの問題が発生
する場合、包装に数ミリメートル程度の穴をいくつかあ
けたり、微細な穴を多数あけたりすることにより水分を
包装外に排出する方法がとられてきた。これらの方法で
は、包装内の環境を内容物の保存に応じて適切にコント
ロールするということはできず十分な品質の保持をおこ
なうことは不可能であった。2. Description of the Related Art When food, fruits and vegetables contain a large amount of water and the water causes problems such as rot and mold, the packaging may have several holes of a few millimeters or fine holes. A method has been adopted in which moisture is discharged to the outside of the package by opening a large number of holes. With these methods, the environment in the package cannot be controlled appropriately according to the storage of the contents, and it is impossible to maintain sufficient quality.
【０００３】食品、青果物、花卉などの保存のためには
水分のコントロールももちろん重要であるが、包装内の
酸素濃度のコントロールもきわめて重要である。たとえ
ば、食品の多くは酸素の存在により酸化が起こり品質の
低下が発生する。青果物、花卉は青果物、花卉自身の呼
吸により包装内のガス濃度を野菜の保存に適した雰囲気
にするというＭＡ（Modified Atmosphere）効果により
品質が長く良好に保たれることが知られている。包装に
数ミリメートル程度の穴をあけたり、微細な穴でも多数
あけたりすると、包装内の酸素濃度は大気とほとんど同
じになり、当然ながら保存性の向上は期待できない。For the preservation of foods, fruits and vegetables, flowers, etc., it is of course important to control the water content, but it is also very important to control the oxygen concentration in the package. For example, many foods are oxidized due to the presence of oxygen, resulting in deterioration of quality. It is known that the quality of fruits and vegetables is kept long and good by the MA (Modified Atmosphere) effect of making the gas concentration in the package an atmosphere suitable for the preservation of vegetables by breathing the fruits and flowers themselves. When a package is made with a hole of about a few millimeters or many fine holes are made, the oxygen concentration in the package becomes almost the same as that in the atmosphere, and naturally the improvement of storage stability cannot be expected.
【０００４】種々の高透湿性素材を用いた包装袋は多数
知られているが、いずれも２層以上からなる多層フィル
ムにする必要があった。これらは価格も高くなり、多層
にするために透湿性も低くなってしまうため安価な単層
フィルムでの包装袋が望まれていた。単層のフィルムで
は高透湿性であり、強度等の物性面、透明性にすぐれ、
汎用品であるため価格が比較的安いなどの理由からポリ
アミド樹脂フィルムがこのような目的に適している素材
フィルムであると考えられるが、単層フィルムでの製袋
技術がなく実用に耐える袋を製造することはできなかっ
た。A large number of packaging bags using various highly moisture-permeable materials are known, but it is necessary to form a multilayer film having two or more layers in each case. Since the price of these is high and the moisture permeability thereof is low due to the multi-layer structure, an inexpensive single-layer film packaging bag has been desired. A single-layer film has high moisture permeability, and has excellent physical properties such as strength and transparency,
Polyamide resin film is considered to be a suitable material film for this purpose because it is a general-purpose product and its price is relatively low. It could not be manufactured.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、従来得られ
なかった低価格で高透湿性を有する包装袋を得ることを
目的とした。SUMMARY OF THE INVENTION It is an object of the present invention to obtain a packaging bag having a low moisture price and a high moisture permeability, which has never been obtained.
【０００６】[0006]
【課題を解決するための手段】本発明は、（1）厚み１
０〜４０μｍの単層のポリアミド樹脂フィルムを袋状に
加工してなる包装袋、（2）厚み１０〜４０μｍのポリ
アミド樹脂フィルムを溶断シールにより袋状に加工する
にあたり、溶断シールする部位に温度が２００〜３００
℃の溶着バーを押し当てることで仮接着した後、温度が
２９０〜４２０℃でかつ溶着バーより少なくとも５０℃
以上温度が高い溶断シール刃を押し当て、その後溶断シ
ールすることを特徴とする包装袋の製造方法、(3) 第
(2)項記載の製造方法により得られる包装袋、(4) 包装
袋外側の一部又は全面に、セルロース、セルロースの誘
導体およびブチラール系樹脂の少なくとも１つを含む厚
み０．０１〜１５μｍの耐熱コート層を設けてなる(1)
又は(3)に記載の包装袋、(5) ポリアミド樹脂フィルム
が、開口部１個の開孔面積が０．０５ｍｍ２以下である
微細孔を１袋あたり１つ以上有している(1)(3)又は(4)
に記載の包装袋、(6) ポリアミド樹脂フィルムが延伸
６−ナイロンである(1)(3)(4)又は(5)に記載の包装袋、
(7) 包装する内容物が食品である(1)(3)(4)(5)又は(6)
に記載の包装袋、(8) 包装する内容物が青果物又は花
卉である(1)(3)(4)(5)又は(6)に記載の包装袋である。The present invention provides (1) thickness 1
A packaging bag formed by processing a single-layer polyamide resin film of 0 to 40 μm into a bag shape. (2) When processing a polyamide resin film of 10 to 40 μm in thickness into a bag shape by fusing and sealing, the temperature at the part to be fused and sealed is 200-300
After temporarily adhering by pressing the welding bar at ℃, the temperature is 290 to 420 ℃ and at least 50 ℃ from the welding bar.
The manufacturing method of the packaging bag, which is characterized by pressing the fusing seal blade having a high temperature above, and then performing the fusing seal, (3)
A packaging bag obtained by the manufacturing method according to (2), (4) Heat resistance of 0.01 to 15 μm containing cellulose, a cellulose derivative and a butyral resin at least on part or all of the outside of the packaging bag. With a coat layer (1)
Alternatively, the packaging bag according to (3), (5) the polyamide resin film has one or more micropores having an opening area of one opening of 0.05 mm2 or less per bag (1) ( 3) or (4)
(6) the packaging bag according to (1), (3), (4) or (5), wherein the polyamide resin film is stretched 6-nylon,
(7) The contents to be packed are foods (1) (3) (4) (5) or (6)
(8) The packaging bag according to (1), (3), (4), (5) or (6), in which the contents to be packaged are fruits and vegetables or flowers.
【０００７】[0007]
【発明の実施の形態】本発明の包装体はポリアミド樹脂
フィルムを用いる。無延伸フィルムなどでもかまわない
が、物性、価格等の点から食品包装用で広く用いられて
いる延伸６−ナイロンフィルムが好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The package of the present invention uses a polyamide resin film. An unstretched film may be used, but a stretched 6-nylon film that is widely used for food packaging is preferred from the viewpoints of physical properties, price and the like.
【０００８】本発明に用いるポリアミド樹脂フィルムの
厚みは、１０〜４０μｍが好ましい。これより薄いと包
装材としての強度が不足し、これより厚いと高価にな
る。ポリアミド樹脂フィルムは必要に応じて、印刷性改
良のため袋表面になる側にコロナ処理を行ったり、防曇
性改良のため防曇剤を練りこんだり、塗布してもかまわ
ない。本発明の袋の形状は、溶断シール袋、三方シール
袋、合掌背貼り袋などいずれでもかまわない。The thickness of the polyamide resin film used in the present invention is preferably 10 to 40 μm. If it is thinner than this, strength as a packaging material is insufficient, and if it is thicker than this, it becomes expensive. If necessary, the polyamide resin film may be subjected to corona treatment on the side of the bag surface for improving printability, or may be kneaded or coated with an antifogging agent for improving antifogging property. The shape of the bag of the present invention may be any such as a fusing seal bag, a three-sided seal bag, and a back-sealed bag.
【０００９】たとえば、溶断シール袋の場合について説
明する。一般にポリアミド樹脂フィルムで実用性のある
溶断シール袋の製造を行うことは困難とされている。低
温で溶断シールしようとするとシールできなかったり、
シール漏れが多発し、それを解決するため溶断シールす
る温度を上げると『ひげ』と呼ばれる溶融した樹脂がひ
っぱられて繊維状になる現象が発生し外観が極めて悪く
なる。良好なポリアミド樹脂フィルムの溶断シール袋を
製造すべく鋭意検討を行ったところ、溶断シール部にあ
らかじめ溶断シールする温度より低い温度のバーを押し
当てフィルムを仮接着しておくことで、『ひげ』の発生
しない温度での溶断シールで十分に実用に耐えうる袋が
得られることを見出した。この際、溶断刃の温度がポリ
アミド樹脂フィルムの融点より高いことは当然必要であ
るが、バーの温度は少なくとも溶断シール刃の温度より
１０℃以上低いことが必要である。この温度差が１０℃
以下であったり、バーの温度が溶断シール刃の温度に比
べて高かった場合にはバーにフィルムが溶着し製袋でき
ない。さらに言えば溶断刃の温度が２９０〜４２０℃、
バーの温度が２００〜３００℃であることが好ましい。For example, the case of a fusing seal bag will be described. In general, it is difficult to manufacture a practical fusing seal bag using a polyamide resin film. If you try to melt and seal at low temperature, you can not seal,
Seal leakage frequently occurs, and if the temperature for fusing and sealing is raised in order to solve it, a phenomenon called "beard" is pulled and becomes fibrous, and the appearance becomes extremely poor. When we conducted a thorough study to manufacture a good fusion-sealing bag made of a polyamide resin film, by pressing a bar at a temperature lower than the temperature at which fusion-sealing was performed beforehand to the fusion-sealing part, and temporarily adhering the film, "beard" It has been found that a fusing seal at a temperature at which does not occur can provide a bag that can sufficiently withstand practical use. At this time, it is naturally necessary that the temperature of the fusing blade is higher than the melting point of the polyamide resin film, but the temperature of the bar is at least 10 ° C. lower than the temperature of the fusing seal blade. This temperature difference is 10 ℃
If the temperature is below or the temperature of the bar is higher than the temperature of the fusing seal blade, the film is welded to the bar and the bag cannot be made. Furthermore, the temperature of the fusing blade is 290 to 420 ° C,
The temperature of the bar is preferably 200 to 300 ° C.
【００１０】次に、三方シール袋について説明する。ポ
リアミド樹脂フィルムの製袋は通常の三方シール袋用の
製袋機で行えばよいが、ポリエチレンやポリオレフィン
などの汎用樹脂に比べてヒートシールの温度を高くとる
必要がある。この場合、製袋速度をあまり上げようとす
ると溶融したフィルムがシールバーに溶着したり、ヒー
トシールの際にエッジ切れしやすく漏れたりするので、
ヒートシールする部分にあらかじめ耐熱コートを付与す
ることが好ましい。コート剤にはセルロースまたはセル
ロースの誘導体およびブチラール系樹脂の少なくとも１
つが含まれていることがポリアミド樹脂フィルムとの密
着性、耐熱性の観点から必要である。より好ましくはブ
チラール系樹脂とセルロースまたはセルロースを含む耐
熱コート層を０．０１〜１５μｍの厚みにコートするこ
とが望ましい。これより薄いと効果がなく、これより厚
くすると生産性が悪いためコストアップし実用性に欠け
る。Next, the three-way seal bag will be described. The bag of the polyamide resin film may be formed by a normal bag making machine for a three-sided seal bag, but the heat sealing temperature needs to be set higher than that of a general-purpose resin such as polyethylene or polyolefin. In this case, if you try to increase the bag-making speed too much, the melted film may be welded to the seal bar, or the edges may be easily cut during heat sealing, and may leak.
It is preferable to apply a heat-resistant coat to the portion to be heat-sealed in advance. At least one of cellulose or a cellulose derivative and butyral resin is used as the coating agent.
It is necessary from the viewpoints of adhesiveness to the polyamide resin film and heat resistance. More preferably, it is desirable to coat a butyral resin and cellulose or a heat-resistant coating layer containing cellulose to a thickness of 0.01 to 15 μm. If it is thinner than this, there is no effect, and if it is thicker than this, the productivity is poor and the cost increases and it is not practical.
【００１１】このような耐熱コートはヒートシールされ
る可能性のある開口部分、もしくは袋全面、もしくは前
記溶断シール袋の開口部に設けてもかまわない。これに
より、ヒートシールによる密封が容易に行えるようにな
る。包装する内容物は何でもかまわないが、たとえば水
分を多く含んでおり保存中に水分が蒸発するものに適し
ている。たとえば、食品、青果物、花卉などが上げられ
る。また、青果物、花卉などを包装する場合、包装内の
酸素濃度をコントロールするために微細孔をあけてもか
まわない。その場合、微細孔は開孔面積０．０５ｍｍ２
以下であることが好ましい。これより大きいと包装内の
酸素濃度をうまくコントロールできない。また、ポリア
ミド樹脂フィルムが酸素バリアー性に比較的優れている
点から、酸素を嫌うものの包装に用いてもかまわない。
また、食品等を包装する場合、酸素吸収剤や炭酸ガス吸
収剤などを併用してもかまわない。これらの場合には当
然のことながら孔をあけない。Such a heat-resistant coat may be provided on the opening portion where there is a possibility of being heat-sealed, on the entire surface of the bag, or on the opening portion of the fusing seal bag. As a result, heat sealing can be easily performed. The contents to be packaged may be anything, but for example, those containing a large amount of water and evaporating water during storage are suitable. For example, foods, fruits and vegetables, flowers and so on. When packaging fruits and vegetables, flowers, etc., fine holes may be provided to control the oxygen concentration in the packaging. In that case, the fine pores have an opening area of 0.05 mm2.
The following is preferable. If it is larger than this, the oxygen concentration in the package cannot be well controlled. In addition, since the polyamide resin film is relatively excellent in oxygen barrier property, it may be used for packaging even though it dislikes oxygen.
When packaging foods and the like, an oxygen absorbent or a carbon dioxide absorbent may be used together. In these cases, of course, no holes are made.
【００１２】[0012]
【実施例】以下実施例で本発明を説明する。なお、本発
明はこの実施例に限定されるものではない。The present invention will be described in the following examples. The present invention is not limited to this embodiment.
【００１３】《実施例１》ユニチカ（株）製の厚み２５
μｍの二軸延伸ナイロンフィルム（商品名 エンブレ
ム）を溶断シール製袋機にセットした。この製袋機には
溶断刃が当たる個所にあらかじめ幅５ｍｍの溶着バーが
あたる機構を有している。溶断刃の温度を３８０℃、溶
着バーの温度を２３０℃として製袋を行ったところ良好
な状態で製袋できた。なお、該ユニチカ（株）製二軸延
伸ナイロンフィルム（商品名 エンブレム）のＪＩＳＫ
７１２９ ４０℃ ９０％ＲＨによる透湿性は１５０ｇ
／ｍ2・24hrであった。<Example 1> Thickness 25 manufactured by Unitika Ltd.
A μm biaxially stretched nylon film (brand name Emblem) was set in a fusing seal bag making machine. This bag-making machine has a mechanism in which a welding bar having a width of 5 mm hits a portion where the fusing blade hits in advance. When the temperature of the fusing blade was set to 380 ° C. and the temperature of the welding bar was set to 230 ° C., the bag was produced, and the bag was produced in a good state. In addition, the JISK of the biaxially stretched nylon film (brand name Emblem) manufactured by Unitika Ltd.
7129 40 ℃ 90% RH moisture permeability is 150g
/ M 2 · 24hr.
【００１４】《比較例１》実施例１において、バーを作
動させずに製袋した。溶断刃を３８０℃まで上げたがシ
ール漏れが多発した。さらに温度を４２０℃まで上げる
と『ひげ』が発生し外観が悪くなった。Comparative Example 1 In Example 1, the bag was manufactured without operating the bar. Although the fusing blade was raised to 380 ° C, seal leakage frequently occurred. When the temperature was further raised to 420 ° C, "whiskers" occurred and the appearance deteriorated.
【００１５】《実施例２》ユニチカ（株）製の厚み２５
μｍの二軸延伸ナイロンフィルム（商品名 エンブレ
ム）に大日本インキ化学工業のディックシールＳＦ１０
０５を厚み約２μｍコートしておいた。このロールフィ
ルムを三方シール製袋機にかけたところ毎分３５ショッ
トで製袋が可能であった。袋はシール漏れや外観など特
に問題なかった。Example 2 Thickness 25 manufactured by Unitika Ltd.
DIC SEAL SF10 from Dainippon Ink & Chemicals, Inc. on a biaxially stretched nylon film (brand name Emblem) of μm
No. 05 was coated to a thickness of about 2 μm. When this roll film was applied to a three-side seal bag making machine, bag making was possible at 35 shots per minute. The bag did not have any problems such as seal leakage or appearance.
【００１６】《比較例２》実施例２と同様に製袋を行っ
た。ただし、耐熱コートは行わなかった。実施例２と同
条件で製袋をするとシール漏れが多発しまた、シール部
分の外観も悪く良好な製品を製造することができなかっ
た。シールバーの温度を下げ製袋速度を落とすと袋の品
質は改善したが、製袋速度１５ショット以上にあげるこ
とはできなかった。Comparative Example 2 Bag making was performed in the same manner as in Example 2. However, heat resistant coating was not performed. When the bag was manufactured under the same conditions as in Example 2, seal leakage frequently occurred, and the appearance of the seal portion was poor, and a good product could not be manufactured. When the temperature of the seal bar was lowered and the bag-making speed was lowered, the bag quality was improved, but the bag-making speed could not be increased to 15 shots or more.
【００１７】[0017]
【発明の効果】本発明の包装袋は、低価格で高透湿性を
有し、内容物の劣化を抑えることができる。INDUSTRIAL APPLICABILITY The packaging bag of the present invention is inexpensive and has high moisture permeability, and can prevent deterioration of the contents.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６５Ｄ 85/50 Ｂ６５Ｄ 85/50 Ａ Ｆターム(参考） 3E035 AA11 BA08 BC02 BD03 3E064 BA36 BC07 EA18 FA01 3E067 AA11 AB01 AB08 AB09 AB90 BA12A BB14A BB26A CA10 CA24 EA06 FA01 FC01 GB02 3E075 BA41 BB03 CA10 DB08 DD14 GA04 3E086 AB01 AD01 BA02 BA04 BA15 BA24 BA43 BB02 BB51 CA01 CA17 CA18 CA19 DA08 Front page continuation (51) Int.Cl. 7 Identification code FI theme code (reference) B65D 85/50 B65D 85/50 AF term (reference) 3E035 AA11 BA08 BC02 BD03 3E064 BA36 BC07 EA18 FA01 3E067 AA11 AB01 AB08 AB09 AB90 BA12A BB14A BB26A CA10 CA24 EA06 FA01 FC01 GB02 3E075 BA41 BB03 CA10 DB08 DD14 GA04 3E086 AB01 AD01 BA02 BA04 BA15 BA24 BA43 BB02 BB51 CA01 CA17 CA18 CA19 DA08
Claims (8)
樹脂フィルムを袋状に加工してなる包装袋。1. A packaging bag obtained by processing a single-layer polyamide resin film having a thickness of 10 to 40 μm into a bag shape.
ィルムを溶断シールにより袋状に加工するにあたり、溶
断シールする部位に温度が２００〜３００℃の溶着バー
を押し当てることで仮接着した後、温度が２９０〜４２
０℃でかつ溶着バーより少なくとも５０℃以上温度が高
い溶断シール刃を押し当て、その後溶断シールすること
を特徴とする包装袋の製造方法。2. When a polyamide resin film having a thickness of 10 to 40 μm is processed into a bag shape by fusing and sealing, a fusion bar having a temperature of 200 to 300 ° C. is temporarily adhered to a portion to be fused and sealed, and then the temperature is changed. 290-42
A method for producing a packaging bag, which comprises pressing a fusing seal blade having a temperature of 0 ° C. and a temperature of at least 50 ° C. higher than that of a welding bar, and then performing a fusing seal.
包装袋。3. A packaging bag obtained by the manufacturing method according to claim 2.
ス、セルロースの誘導体およびブチラール系樹脂の少な
くとも１つを含む厚み０．０１〜１５μｍの耐熱コート
層を設けてなる請求項１又は３に記載の包装袋。4. The heat resistant coating layer having a thickness of 0.01 to 15 μm containing at least one of cellulose, a cellulose derivative and a butyral resin, is provided on a part or the entire surface of the outer side of the packaging bag. The stated packaging bag.
の開孔面積が０．０５ｍｍ２以下である微細孔を１袋あ
たり１つ以上有している請求項１、３又は４に記載の包
装袋。5. The packaging bag according to claim 1, 3 or 4, wherein the polyamide resin film has one or more fine holes each having an opening area of 0.05 mm 2 or less per bag. .
ンである請求項１、３、４又は５に記載の包装袋。6. The packaging bag according to claim 1, 3, 4 or 5, wherein the polyamide resin film is stretched 6-nylon.
３、４、５又は６に記載の包装袋。7. The packaged contents are foods, 1.
The packaging bag according to 3, 4, 5 or 6.
求項１、３、４、５又は６に記載の包装袋。8. The packaging bag according to claim 1, wherein the contents to be packaged are fruits and vegetables or flowers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334018A JP2003137303A (en) | 2001-10-31 | 2001-10-31 | Packaging bag made of polyamide resin film and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001334018A JP2003137303A (en) | 2001-10-31 | 2001-10-31 | Packaging bag made of polyamide resin film and manufacturing method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003137303A true JP2003137303A (en) | 2003-05-14 |
Family
ID=19149210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001334018A Pending JP2003137303A (en) | 2001-10-31 | 2001-10-31 | Packaging bag made of polyamide resin film and manufacturing method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003137303A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004358837A (en) * | 2003-06-05 | 2004-12-24 | Unitika Ltd | Polyamide film for packaging bag and liquid filling packaging bag using it |
| JP2007039087A (en) * | 2005-08-04 | 2007-02-15 | Sumitomo Bakelite Co Ltd | Packaging bag |
| JP2018530484A (en) * | 2015-09-18 | 2018-10-18 | ジョンソン、マッセイ、パブリック、リミテッド、カンパニーＪｏｈｎｓｏｎ Ｍａｔｔｈｅｙ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ | Food packaging |
-
2001
- 2001-10-31 JP JP2001334018A patent/JP2003137303A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004358837A (en) * | 2003-06-05 | 2004-12-24 | Unitika Ltd | Polyamide film for packaging bag and liquid filling packaging bag using it |
| JP2007039087A (en) * | 2005-08-04 | 2007-02-15 | Sumitomo Bakelite Co Ltd | Packaging bag |
| JP2018530484A (en) * | 2015-09-18 | 2018-10-18 | ジョンソン、マッセイ、パブリック、リミテッド、カンパニーＪｏｈｎｓｏｎ Ｍａｔｔｈｅｙ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ | Food packaging |
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