JP4284481B2 - Oxygen detector with oxygen detection function - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、食品等の保存のために使用される脱酸素剤包装体に関する。更に詳しくは、酸素の有無を色調の変化で表示する酸素検知機能を付与した脱酸素剤包装体に関する。
【０００２】
【従来の技術】
脱酸素剤包装体は、通常、脱酸素剤をヒートシール性を有する包装材料を用いて三方シール又は四方シール等のヒートシールにより包装することにより製造され、容器内の酸素を吸収する機能を有し、包装された食品の鮮度保持および医薬品の保存等に使用されている。酸素検知剤（酸素インジケーター）は酸素の濃度変化を検知する機能を有し、包装容器内の酸素が脱酸素剤により十分に除かれたことを色調の変化により表示するものである。酸素検知機能付脱酸素剤包装体は、ラベル状、シート状、糸状あるいは板状のテープ状酸素検知剤を接着剤や両面接着テープなどで脱酸素剤包装体に固定したものとして、実用化されている。
例えば、実開平４−３９８０号公報には、シート状の酸素検知剤を接着剤または両面接着テープで脱酸素剤包装体の包材に貼付ける方法が提案されている。また、特開平８−２８２７４０号公報には脱酸素剤包装袋／両面接着テープ／酸素検知剤シート／透明フィルムを順に積層させた酸素検知機能付脱酸素包装袋が開示されている。
【０００３】
しかしながら、これらの一体化した酸素検知剤は、脱酸素剤包装袋の片面の通気孔を帯状に塞ぐために、脱酸素剤の酸素吸収能力が低下する場合があった。さらに不都合なことに、特に油分の多い食品等の保存に適用した際には、脱酸素剤包装袋の酸素検知剤面と包装袋内面が密着してしまい、雰囲気の脱酸素状態を正しく反映しない色調を示す場合があった。
特に、包装袋の両面が通気性の包装材料からなる脱酸素剤包装体は、保存物品に適用する際、脱酸素剤包装体の向きを選ばないという利点を有するが、この脱酸素剤包装体の片面に酸素検知剤を貼付したのでは脱酸素剤包装体の向きによっては酸素検知剤が隠れてしまうために、脱酸素剤包装体の向きを制御する手段を講じるか、酸素検知剤を包装体の両面に貼付した脱酸素剤包装体を使用しなければならなかった。
【０００４】
また、特開平８−２７５７６０号公報には、透明粘着テープで被覆した糸状の酸素検知剤を脱酸素剤包装袋の周辺シール部に接着して、脱酸素剤包装体の表裏のいずれからも変色が確認できるようにした酸素検知機能付脱酸素包装袋が開示されている。しかしながら、この一体化した酸素検知剤は、端面が開いていることから、食品等の被保存物に含まれる水分や油分が糸状の酸素検知剤に浸透し変色機能が損なわれる問題、および解れた糸が食品等に付着する問題があった。
【０００５】
【発明が解決しようとする課題】
従来の酸素検知剤を添付した脱酸素剤は、脱酸素剤の酸素吸収能力が低下する問題、食品等は脱酸素雰囲気に保持されているにもかかわらず酸素検知剤は非脱酸素状態を示す問題、水分や油分により酸素検知剤の変色機能が損なわれる問題、食品等に酸素検知剤由来の異物が付着する等の問題を有するが、本発明は、これを解決し、実用範囲が広くかつ性能と安全性に優れ、脱酸素剤包装体のどちらの面からも酸素検知剤の変色を目視できる酸素検知機能付脱酸素剤を開発することを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、酸素検知組成物を非通気性かつ非透湿性の透明な片面粘着テープで被覆したテープ状酸素検知剤を脱酸素剤包装袋の周辺シール部に挟み込むように貼付けた酸素検知機能付脱酸素剤である。本発明のテープ状酸素検知剤は、好ましくは、酸素検知組成物を添付したテープを該テープより幅が広い非通気性かつ非透湿性の透明な片面粘着テープで覆ってなるテープ状酸素検知剤である。
【０００７】
本発明のテープ状酸素検知剤は、酸素検知組成物が添着された酸素検知剤テープと、非通気性かつ非透湿性の透明な片面粘着テープから成る。
本発明を構成する酸素検知剤テープは、基材表面に酸素検知組成物を添着したものであり、酸素検知組成物が周囲雰囲気の酸素濃度に応じて変色することにより酸素の有無を表示する。酸素検知組成物としては、アントラキノン系、インジゴ系、チアジン系、硫化染料等の還元剤によって色変化を示す染料、アルカリ金属又はアルカリ土類金属の水酸化物や塩等のアルカリ性物質、及び、還元糖類等の還元剤を必須成分とする組成物が好ましく用いられる。これらの必須成分に、必要に応じて、溶媒、還元剤によって変色しない染料又は顔料、水溶性高分子、バインダー樹脂等を組み合わせて添加し、テープ状基材に添着する。添着方法としては、塗布、印刷又は含浸等の各方法が例示される。
高湿度の過酷な条件下でも高い酸素検知性能を発揮するために、酸素検知剤テープとしては、非通気性かつ非透湿性の合成紙又はフィルムの片面に前記酸素検知組成物を塗布又は印刷したものが好ましく用いられる。
【０００８】
基材としては、非通気性かつ非透湿性の合成紙又はフィルム等が用いられる。例えば、ポリエチレン、ポリプロピレン、ポリエステル、ポリアミド、ポリカーボネート、セルロースアセテート、セロハン等があげられるが、透明性、柔軟性、強度等の面から、延伸ポリプロピレン又はポリエステルが好ましい。基材の厚みは実用的な強度と柔軟性があれば特に問わないが、１０〜１００ミクロンが好ましい。また、基材の酸素透過度は５０〜３０００ml／m2・day・atmが好まし
く、透湿度は５０ｇ／m2・day以下が好ましい。
基材は、酸素検知剤の色変化を見やすくするために、不透明又は適宜着色したものが好ましい。更に酸素検知剤の色変化が判るように一部分を透明のまま残し、他の部分に隠蔽の文字や絵文字等の情報表示をしたり、酸素検知剤色調を判別しやすくする目的で適宜の色調での印刷を施しても良い。
【０００９】
本発明を構成する非通気性かつ非透湿性の透明な片面粘着テープは、好ましくは、プラスチックフィルムの片面に粘着剤が塗布または積層されているものである。プラスチックフィルムの材質としては、ポリエチレン、ポリプロピレン、ポリエステル、ポリアミド、ポリカーボネート、セルロースアセテート、セロハン等があげられるが、透明性、柔軟性、強度等の面から、延伸ポリプロピレン及びポリエステルが好ましい。プラスチックフィルムの厚みは実用的な強度と柔軟性があれば特に問わないが、１０〜１００ミクロンが好ましい。プラスチックフィルムは無色透明でも、酸素検知剤の色変化を見やすくするために適宜着色した透明のものでも良い。更に酸素検知剤の色変化が判るように一部分を透明のまま残し、他の部分に隠蔽の文字や絵文字等の情報表示をしたり、酸素検知剤色調を判別しやすくする目的で適宜の色調での印刷を施しても良い。また、プラスチックフィルムの酸素透過度は５０〜３０００ml／m2・day・atmが好ましい。透湿度は、５０ｇ／m2・day以下が好ましい。
【００１０】
本発明の片面粘着テープに塗布または積層される粘着剤としては、合成ゴム系、天然ゴム系、アクリル系、シリコン系等既存のものを用いることができる。好ましくは、粘着剤はプラスチックフィルム片面全体に塗布又は積層される。この際、粘着剤の種類と厚みは、酸素検知剤に用いる色素が染着したり色素の変色を阻害したりしないこと、透明性に優れること、安全衛生性に優れること、被着体に対する適度な接着性が得られること等を考慮して適宜選択すればよい。
【００１１】
本発明は、酸素検知組成物を非通気性かつ非透湿性の透明な片面粘着テープで被覆したテープ状酸素検知剤が脱酸素剤包装袋に貼付されるが、その際、テープ状酸素検知剤が脱酸素剤包装袋のシール部を挟み込むように貼付されることを特徴とする。
本発明では、酸素検知組成物を非通気性かつ非透湿性の透明な片面粘着テープで覆うことにより耐水耐油性が付与される。そのため、テープ状貼付用酸素検知剤により、添着した酸素検知組成物全体が実質的に空隙なく粘着され、又は、酸素検知剤の添着面の実質的に全てが前記粘着テープにより塞がれていることが好ましい。
【００１２】
【発明の実施の形態】
本発明の好ましい形態は、酸素検知組成物を非通気性かつ非透湿性の透明な片面粘着テープで被覆したテープ状酸素検知剤を、脱酸素剤包装袋の周辺シール部を挟み込むように貼付けた酸素検知機能付脱酸素剤である。図１は、その一例を示す図である。以下、図１に即して説明する。
本発明の酸素検知機能付脱酸素剤は、テープ状酸素検知剤１を脱酸素剤包装袋２の四方シールされた周辺シール部に貼付けられる。脱酸素剤包装体の通気孔を塞がないことにより、脱酸素剤の酸素吸収能力が低下しない。また、周辺シール部は脱酸素剤包装体の中央部又は脱酸素剤充填部分に比べて極端に薄くなっているために、油分の多い食品等の保存に用いた際にも酸素検知剤が包装袋に密着する現象が起こらず、雰囲気の脱酸素状態が正しく反映される。また、脱酸素剤包装袋の周辺シール部を挟み込むように貼付されているために、脱酸素剤包装体のどちらの面からも酸素検知剤の変色を目視できる。
【００１３】
また、貼付けたテープ状酸素検知剤１は、基材３に印刷した酸素検知組成物４を非通気性かつ非透湿性の透明な片面粘着テープ５で被覆される。これにより、テープ状酸素検知剤は耐水耐油性を有するので、水分や油分が酸素検知剤に浸透して変色機能が損われる問題および酸素検知組成物が食品等に付着する等の問題が生じない。
【００１４】
【実施例】
次に実施例を挙げて本発明を更に具体的に説明する。
実施例１
〔酸素検知剤の調製〕
アルカリ性物質として水酸化マグネシウム微粉末、還元剤としてフルクトース、還元剤によって変色する色素としてメチレンブルー（C.I.Basic Blue 9）を含有し、その他にバインダー樹脂としてエチルセルロース、還元剤により変色しない色素としてフロキシン（C.I.Acid Red 92）、溶剤として水とメタノールを含有するインキを調合した。
〔テープ状酸素検知剤の作成〕
上記インキをグラビア印刷によりポリプロピレン系合成紙（王子製紙（株）製商品名ユポ、厚み７０μm）の表面に直径5mmの円形に塗布し、乾燥した。次に、この印刷物を一列づつ裁断して紙管に巻き付けることにより、テープ状酸素検知剤が一列で多数連なる連続体を得た。
【００１５】
〔酸素検知機能付脱酸素剤包装体の作製〕
上記テープ状酸素検知剤を、テープ状酸素検知剤より幅の広い、基材が延伸ポリプロピレンフィルムで片面全面にアクリル系粘着剤が塗工してある厚み40μmの透明片面粘着テープ（積水化学工業（株）製商品名カットロンテープNo.810）で覆い、長手方向に山折りし、両面吸収タイプの水分依存型脱酸素剤（三菱ガス化学（株）製商品名エージレスFY-100）のヒートシールされた一辺に挟み込むように貼付けて酸素検知機能付脱酸素剤を作製した。
〔酸素検知機能付脱酸素剤の性能〕
上記酸素検知機能付脱酸素剤を、ガスバリア袋に空気500mlおよび湿度を90%RHにする調湿剤を含浸した脱脂綿と共に密封し、25℃の室内に保存した。この袋内のガスを一定時間ごとに少量づつ採取しジルコニア酸素計により酸素濃度を測定すると共に酸素検知剤の色調と様相を観察した。袋内の酸素濃度が0.1%に達するのに要した時間は16ｈであった。空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は、袋内の酸素濃度が0.1%に達した後4h以内に桃色になり、色調と様相は60日間の保存期間中、変わらなかった。
【００１６】
実施例２
実施例１の酸素検知機能付脱酸素剤の性能評価において、湿度を90%RHにする調湿剤の代わりに水を用いて湿度を100%RHにして酸素濃度を測定すると共に酸素検知剤の色調と様相を観察した。袋内の酸素濃度が0.1%に達するのに要した時間は12ｈであった。空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は、袋内の酸素濃度が0.1%に達した後4h以内に桃色になり、色調と様相は60日間の保存期間中、変わらなかった。
【００１７】
実施例３
脱酸素剤包装体として三方シールされた両面吸収タイプの自力反応型脱酸素剤（三菱ガス化学（株）製商品名エージレスSA-30）を用いたこと以外は実施例1と同様にしてテープ状酸素検知剤を脱酸素剤包装体の周辺シール部に貼付けた酸素検知機能付脱酸素剤を作製し、油分の多いケーキタイプの洋菓子（（株）アンデルセン製商品名「ブラウニー」）及び空気150mlと共にガスバリア袋に密封し、25℃の室内に保存した。
空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は、袋内の酸素濃度が0.1%に達したのとほぼ同時に桃色になり、色調と様相は30日間の保存期間中、変わらなかった。
【００１８】
比較例１
テープ状酸素検知剤を、脱酸素剤包装体の周辺シール部ではなく、脱酸素剤包装体の片面中央に貼付けたこと以外は実施例1と同様にして酸素検知機能付脱酸素剤を作製し、その性能を評価した。袋内の酸素濃度が0.1%に達するのに要した時間は19ｈであった。すなわち、片面中央に貼付けたために脱酸素に要する時間が3h延びた。空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は、袋内の酸素濃度が0.1%に達した後4h以内に桃色になり、色調と様相は60日間の保存期間中、変わらなかった。
【００１９】
比較例２
テープ状酸素検知剤の代わりに、酸素検知剤成分を含浸した木綿の５号刺繍糸を脱酸素剤包装体の周辺シール部に添わせて貼付けたこと以外は実施例１と同様にして酸素検知機能付脱酸素剤を作製し、その性能評価を実施例２と同様に実施した。袋内の酸素濃度が0.1%に達するのに要した時間は14ｈであった。
空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は、袋内の酸素濃度が0.1%に達した後4h以内に桃色になったが、20日後には赤みを帯びた桃色に、40日後にはさらに濡れて赤みを帯びた桃色になり、糸の端部の検知剤成分が流れ出た様子が認められた。
【００２０】
比較例３
テープ状酸素検知剤を、脱酸素剤包装体の周辺シール部ではなく、脱酸素剤包装体の片面中央部に貼付けたこと以外は実施例３と同様にして、油分の多い洋菓子の脱酸素保存に適用した。空気と共に密封した時に酸素の存在を表す青色を示した酸素検知剤は袋内の酸素濃度が0.1%に達したのとほぼ同時に桃色になった。10日後に、袋内の酸素濃度が0.1%以下であるにもかかわらず、酸素検知剤が紫色になった。
【００２１】
【発明の効果】
本発明によれば、テープ状酸素検知剤を脱酸素包装袋の周辺シール部に貼付けた酸素検知機能付脱酸素剤は、脱酸素包装袋の中央部に貼付けた場合に比べて酸素吸収速度が速く、脱酸素剤が本来有する酸素吸収能力を妨げない。また、油分の多い食品等の保存に用いた際にも酸素検知剤が包装袋に密着することがないので、食品等が脱酸素雰囲気に保持されていれば酸素検知剤は必ず脱酸素状態であることを示す。また、脱酸素剤包装体のどちらの面からも酸素検知剤の変色を目視できる利点を有する。さらに、酸素検知組成物を非通気性かつ非透湿性の透明な片面粘着テープによって覆った結果、耐水耐油性を有し、酸素検知剤に由来する汚染物が食品等に付着する恐れが生じないので、脱酸素剤による食品および医薬品等の品質保持の分野に極めて有用である。
【００２２】
本発明のテープ状酸素検知剤は、厚みが薄いので違和感がない。また、小片状のラベル状とすることができるために、脱酸素剤の能力にほとんど影響を与えず、脱酸素剤と一体化した際にも違和感がない。また、テープ状酸素検知剤が脱酸素剤包装体の周辺シール部を挟み込むようにを貼付されているために、脱酸素剤包装体の脱酸素能力に影響を与えない。さらに、非通気性かつ非透湿性の透明な片面粘着テープで覆われているために、耐水・耐油性を有する。
特に、包装袋の両面が通気性の包装材料からなる両面吸収タイプの脱酸素剤包装体の周辺シール部を挟み込むようにテープ状酸素検知剤を貼付した脱酸素剤包装体は、向きによって酸素検知剤が隠れてしまうことがないために、保存物品に適用する際、脱酸素剤包装体の向きを選ばないという利点を有する。
【図面の簡単な説明】
【図１】 本発明の酸素検知機能付脱酸素剤包装体の一例（平面図）。
【符号の説明】
１ 酸素検知剤テープ
２ 脱酸素剤包装袋
３ 基材
４ 酸素検知組成物
５ 片面粘着テープ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oxygen scavenger package used for the preservation of foods and the like. More specifically, the present invention relates to an oxygen scavenger package provided with an oxygen detection function that displays the presence or absence of oxygen by a change in color tone.
[0002]
[Prior art]
An oxygen scavenger package is usually manufactured by packaging an oxygen scavenger with a heat seal such as a three-side seal or a four-side seal using a heat-sealing packaging material, and has a function of absorbing oxygen in the container. It is used for maintaining the freshness of packaged foods and preserving pharmaceuticals. The oxygen detector (oxygen indicator) has a function of detecting a change in oxygen concentration, and displays that the oxygen in the packaging container has been sufficiently removed by the oxygen scavenger by a change in color tone. The oxygen scavenger package with oxygen detection function has been put into practical use as a label, sheet, thread or plate tape oxygen detector fixed to the oxygen scavenger package with adhesive or double-sided adhesive tape. ing.
For example, Japanese Utility Model Laid-Open No. 4-3980 proposes a method in which a sheet-like oxygen detector is attached to a packaging material of an oxygen scavenger package with an adhesive or a double-sided adhesive tape. Japanese Patent Application Laid-Open No. 8-282740 discloses a deoxygenation packaging bag with an oxygen detection function in which an oxygen scavenger packaging bag / double-sided adhesive tape / oxygen detection agent sheet / transparent film are laminated in order.
[0003]
However, since these integrated oxygen detectors block the ventilation holes on one side of the oxygen absorber packaging bag in a band shape, the oxygen absorbing ability of the oxygen absorber may be reduced. Furthermore, especially when applied to the preservation of foods with high oil content, the oxygen detector surface of the oxygen scavenger packaging bag is in close contact with the inner surface of the packaging bag, which does not correctly reflect the deoxygenated state of the atmosphere. There was a case of showing a color tone.
In particular, an oxygen scavenger package made of a breathable packaging material on both sides of the packaging bag has the advantage that the orientation of the oxygen scavenger package is not limited when applied to a stored article. If the oxygen detector is affixed to one side, the oxygen detector may be hidden depending on the orientation of the oxygen scavenger package, so measures should be taken to control the orientation of the oxygen scavenger package or the oxygen detector should be packaged. The oxygen scavenger package attached to both sides of the body had to be used.
[0004]
Japanese Patent Application Laid-Open No. 8-275760 discloses that an oxygen detecting agent covered with a transparent adhesive tape is adhered to a peripheral seal portion of an oxygen scavenger packaging bag and discolored from both the front and back of the oxygen absorber packaging. There is disclosed a deoxygenation packaging bag with an oxygen detection function which can be confirmed. However, since this integrated oxygen detector has an open end surface, the problem that water and oil contained in the stored object such as food permeates into the filamentous oxygen detector and the discoloring function is impaired, has been solved. There was a problem that the yarn adheres to food.
[0005]
[Problems to be solved by the invention]
The oxygen scavenger attached with the conventional oxygen detector is a problem that the oxygen absorption capacity of the oxygen scavenger decreases, and the oxygen detector shows a non-deoxygenated state even though foods are kept in a deoxygenated atmosphere. There are problems, such as the problem that the discoloration function of the oxygen detector is impaired by moisture and oil, the problem that foreign substances derived from the oxygen detector adhere to foods, etc., but the present invention solves this and has a wide practical range and The objective is to develop a deoxygenating agent with an oxygen detection function that is superior in performance and safety and that can visually observe the discoloration of the oxygen detecting agent from either side of the oxygen scavenger package.
[0006]
[Means for Solving the Problems]
The present invention has an oxygen detection function in which a tape-shaped oxygen detector coated with a non-breathable and moisture-impermeable transparent single-sided adhesive tape is attached so as to be sandwiched between peripheral seal portions of an oxygen scavenger packaging bag. It is an oxygen scavenger. The tape-like oxygen detector of the present invention is preferably a tape-like oxygen detector formed by covering a tape attached with an oxygen-sensing composition with a non-breathable and moisture-permeable transparent single-sided adhesive tape wider than the tape. It is.
[0007]
The tape-shaped oxygen detector of the present invention comprises an oxygen detector tape to which an oxygen detection composition is attached and a non-breathable and moisture-permeable transparent single-sided adhesive tape.
The oxygen detection agent tape constituting the present invention is obtained by attaching an oxygen detection composition to the surface of a base material, and the presence or absence of oxygen is displayed by changing the color of the oxygen detection composition according to the oxygen concentration in the ambient atmosphere. Oxygen detection compositions include anthraquinone, indigo, thiazine, dyes that change color with a reducing agent such as sulfur dyes, alkaline substances such as alkali metal or alkaline earth metal hydroxides and salts, and reduction A composition containing a reducing agent such as sugar as an essential component is preferably used. If necessary, these essential components are added in combination with a solvent, a dye or pigment that does not change color with a reducing agent, a water-soluble polymer, a binder resin, and the like, and are attached to a tape-like substrate. Examples of the attaching method include each method such as coating, printing or impregnation.
In order to demonstrate high oxygen detection performance even under severe conditions of high humidity, as the oxygen detection agent tape, the oxygen detection composition is applied or printed on one side of a non-breathable and non-breathable synthetic paper or film. Those are preferably used.
[0008]
As the substrate, non-breathable and non-breathable synthetic paper or film is used. For example, polyethylene, polypropylene, polyester, polyamide, polycarbonate, cellulose acetate, cellophane, and the like can be mentioned. From the viewpoint of transparency, flexibility, strength, and the like, stretched polypropylene or polyester is preferable. The thickness of the substrate is not particularly limited as long as it has practical strength and flexibility, but is preferably 10 to 100 microns. The oxygen permeability of the substrate is preferably 50 to 3000 ml / m 2 · day · atm, and the moisture permeability is preferably 50 g / m 2 · day or less.
The base material is preferably opaque or appropriately colored in order to make the color change of the oxygen detector easy to see. Furthermore, leave the part transparent so that the color change of the oxygen detector can be seen, display information such as concealed characters and pictograms in other parts, and make it easy to distinguish the oxygen detector color tone. May be printed.
[0009]
The non-breathable and moisture-permeable transparent single-sided adhesive tape constituting the present invention is preferably one in which an adhesive is applied or laminated on one side of a plastic film. Examples of the material of the plastic film include polyethylene, polypropylene, polyester, polyamide, polycarbonate, cellulose acetate, cellophane, and the like. From the viewpoint of transparency, flexibility, strength, and the like, stretched polypropylene and polyester are preferable. The thickness of the plastic film is not particularly limited as long as it has practical strength and flexibility, but is preferably 10 to 100 microns. The plastic film may be colorless and transparent, or a transparent film appropriately colored to make the color change of the oxygen detector easy to see. Furthermore, leave the part transparent so that the color change of the oxygen detector can be seen, display information such as concealed characters and pictograms in other parts, and make it easy to distinguish the oxygen detector color tone. May be printed. The oxygen permeability of the plastic film is preferably 50 to 3000 ml / m 2 · day · atm. The moisture permeability is preferably 50 g / m 2 · day or less.
[0010]
As the pressure-sensitive adhesive applied or laminated on the single-sided pressure-sensitive adhesive tape of the present invention, existing ones such as a synthetic rubber type, a natural rubber type, an acrylic type, and a silicon type can be used. Preferably, the pressure-sensitive adhesive is applied or laminated on the entire surface of the plastic film. At this time, the type and thickness of the pressure-sensitive adhesive are such that the dye used for the oxygen detector does not stain or inhibit discoloration of the dye, is excellent in transparency, is excellent in safety and hygiene, and is appropriate for the adherend. May be selected as appropriate in consideration of obtaining good adhesiveness.
[0011]
In the present invention, a tape-like oxygen detector obtained by coating an oxygen-sensing composition with a non-breathable and moisture-permeable transparent single-sided adhesive tape is affixed to an oxygen scavenger packaging bag. Is attached so as to sandwich the seal portion of the oxygen scavenger packaging bag.
In the present invention, water and oil resistance is imparted by covering the oxygen-sensing composition with a non-breathable and moisture-permeable transparent single-sided adhesive tape. Therefore, the attached oxygen detection composition is adhered to the entire oxygen detection composition substantially without voids, or substantially all of the oxygen detection agent attachment surface is blocked by the adhesive tape. It is preferable.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In a preferred embodiment of the present invention, a tape-shaped oxygen detector coated with a non-breathable and moisture-permeable transparent single-sided adhesive tape is pasted so as to sandwich the peripheral seal portion of the oxygen scavenger packaging bag. It is an oxygen scavenger with an oxygen detection function. FIG. 1 is a diagram illustrating an example thereof. Hereinafter, description will be given with reference to FIG.
The oxygen scavenger with oxygen detecting function of the present invention is affixed to the peripheral seal portion where the tape-shaped
[0013]
The tape-
[0014]
【Example】
Next, the present invention will be described more specifically with reference to examples.
Example 1
(Preparation of oxygen detector)
Magnesium hydroxide fine powder as an alkaline substance, fructose as a reducing agent, methylene blue (CI Basic Blue 9) as a dye that changes color with a reducing agent, ethyl cellulose as a binder resin, and Phloxine (CIAcid Red 92 as a dye that does not change color with a reducing agent) ), Ink containing water and methanol as solvent was prepared.
[Preparation of tape-shaped oxygen detector]
The above ink was applied in a circular shape with a diameter of 5 mm on the surface of polypropylene synthetic paper (trade name YUPO, thickness 70 μm, manufactured by Oji Paper Co., Ltd.) by gravure printing, and dried. Next, the printed material was cut in a row and wound around a paper tube, thereby obtaining a continuous body in which a large number of tape-shaped oxygen detectors were arranged in a row.
[0015]
[Production of oxygen scavenger package with oxygen detection function]
The tape-shaped oxygen detector is a transparent single-sided adhesive tape (Sekisui Chemical Co., Ltd.) with a thickness of 40μm, which is wider than the tape-like oxygen detector, the base material is a stretched polypropylene film, and the acrylic adhesive is coated on the entire surface. Covered with product name cutlon tape No.810), folded in the longitudinal direction, and heat-sealed with a double-sided absorption-type moisture-dependent oxygen scavenger (product name Ageless FY-100, manufactured by Mitsubishi Gas Chemical Co., Ltd.) The oxygen scavenger with oxygen detection function was prepared by pasting it so as to be sandwiched between the two sides.
[Performance of oxygen scavenger with oxygen detection function]
The above oxygen scavenger with oxygen detecting function was sealed together with absorbent cotton impregnated with 500 ml of air and a humidity control agent having a humidity of 90% RH in a gas barrier bag, and stored in a room at 25 ° C. A small amount of the gas in the bag was sampled at regular intervals, the oxygen concentration was measured with a zirconia oxygen meter, and the color tone and appearance of the oxygen detector were observed. The time required for the oxygen concentration in the bag to reach 0.1% was 16 h. Oxygen detector that showed blue color indicating the presence of oxygen when sealed with air turned pink within 4 hours after the oxygen concentration in the bag reached 0.1%, and the color and appearance changed during the 60-day storage period. There wasn't.
[0016]
Example 2
In the performance evaluation of the oxygen scavenger with the oxygen detection function of Example 1, water was used in place of the humidity control agent that adjusted the humidity to 90% RH, and the oxygen concentration was measured at a humidity of 100% RH. The color tone and appearance were observed. The time required for the oxygen concentration in the bag to reach 0.1% was 12 hours. Oxygen detector that showed blue color indicating the presence of oxygen when sealed with air turned pink within 4 hours after the oxygen concentration in the bag reached 0.1%, and the color and appearance changed during the 60-day storage period. There wasn't.
[0017]
Example 3
Tape-shaped as in Example 1 except that a double-sided absorption type self-reactive oxygen absorber (trade name AGELESS SA-30 manufactured by Mitsubishi Gas Chemical Co., Ltd.) was used as the oxygen absorber package. Oxygen detection agent is attached to the peripheral seal part of the oxygen scavenger package, and an oxygen detection function-equipped oxygen scavenger is prepared. Together with oily cake type Western confectionery (trade name "Browny" manufactured by Andersen) and 150ml of air Sealed in a gas barrier bag and stored in a room at 25 ° C.
Oxygen detector that showed blue color indicating the presence of oxygen when sealed with air turned pink almost as soon as the oxygen concentration in the bag reached 0.1%, and the color and appearance changed during the 30-day storage period. There wasn't.
[0018]
Comparative Example 1
A oxygen scavenger with oxygen sensing function was prepared in the same manner as in Example 1 except that the tape-shaped oxygen detector was attached to the center of one side of the oxygen scavenger package rather than the peripheral seal of the oxygen scavenger package. , Evaluated its performance. The time required for the oxygen concentration in the bag to reach 0.1% was 19 hours. That is, since it was attached to the center of one side, the time required for deoxidation was extended by 3 hours. Oxygen detector that showed blue color indicating the presence of oxygen when sealed with air turned pink within 4 hours after the oxygen concentration in the bag reached 0.1%, and the color and appearance changed during the 60-day storage period. There wasn't.
[0019]
Comparative Example 2
Instead of the tape oxygen detector, oxygen detection was performed in the same manner as in Example 1 except that a cotton No. 5 embroidery thread impregnated with an oxygen detector component was attached to the peripheral seal portion of the oxygen absorber package. A functional oxygen scavenger was prepared, and its performance was evaluated in the same manner as in Example 2. The time required for the oxygen concentration in the bag to reach 0.1% was 14 hours.
The oxygen detector that showed a blue color indicating the presence of oxygen when sealed with air turned pink within 4 hours after the oxygen concentration in the bag reached 0.1%, but it turned reddish pink after 20 days. After 40 days, it became more wet and reddish pink, and the detector component at the end of the thread flowed out.
[0020]
Comparative Example 3
Deoxygenated preservation of pastry confectionery with a high amount of oil in the same manner as in Example 3 except that the tape-like oxygen detector was attached not to the peripheral seal portion of the oxygen absorber package but to the center of one surface of the oxygen absorber package. Applied to. The oxygen detector that showed a blue color indicating the presence of oxygen when sealed with air turned pink almost as soon as the oxygen concentration in the bag reached 0.1%. Ten days later, the oxygen detection agent turned purple even though the oxygen concentration in the bag was 0.1% or less.
[0021]
【The invention's effect】
According to the present invention, the oxygen-detecting function-deoxygenating agent in which the tape-like oxygen detecting agent is attached to the peripheral seal portion of the deoxygenating packaging bag has an oxygen absorption rate compared to the case where it is attached to the central portion of the deoxidizing packaging bag. It is fast and does not interfere with the oxygen absorbing ability inherent in oxygen scavengers. In addition, since oxygen detectors do not adhere to the packaging bag even when used to store foods with high oil content, the oxygen detectors must always be in a deoxygenated state if they are kept in a deoxygenated atmosphere. Indicates that there is. Moreover, it has the advantage that the discoloration of the oxygen detector can be visually observed from either side of the oxygen scavenger package. Furthermore, as a result of covering the oxygen-sensing composition with a non-breathable and moisture-permeable transparent single-sided adhesive tape, it has water and oil resistance, and there is no possibility that contaminants derived from the oxygen sensing agent will adhere to foods, etc. Therefore, it is extremely useful in the field of maintaining the quality of foods and pharmaceuticals using an oxygen scavenger.
[0022]
Since the tape-shaped oxygen detector of the present invention is thin, there is no sense of incongruity. Moreover, since it can be in the form of small pieces of labels, it hardly affects the ability of the oxygen scavenger, and there is no sense of incompatibility when integrated with the oxygen scavenger. In addition, since the tape-like oxygen detector is attached so as to sandwich the peripheral seal portion of the oxygen absorber package, the oxygen absorber capacity of the oxygen absorber package is not affected. Furthermore, since it is covered with a non-breathable and moisture-permeable transparent single-sided adhesive tape, it has water and oil resistance.
In particular, the oxygen scavenger package with a tape-shaped oxygen detector attached so as to sandwich the peripheral seal part of a double-sided absorption type oxygen scavenger package made of a breathable packaging material on both sides of the packaging bag detects oxygen depending on the orientation. Since the agent is not hidden, it has the advantage that the orientation of the oxygen scavenger package is not limited when applied to a storage article.
[Brief description of the drawings]
FIG. 1 shows an example (plan view) of an oxygen scavenger package with an oxygen detection function of the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (3)
群Ａ：ポリエチレン、ポリプロピレン、ポリエステル、ポリアミド、ポリカーボネート、セルロースアセテート、セロハン及び延伸ポリプロピレン A synthetic paper or film made of one kind of material selected from the following group A as a base material, an oxygen detection agent tape having an oxygen detection composition attached to the surface of the base material, wider than the oxygen detection agent tape , tape oxygen detecting agent which one side adhesive plastic film made of one material selected from the following group a is formed by coating with a transparent one-sided adhesive tape which is coated or laminated, the adhesive surface of the single-sided adhesive tape The tape-shaped detection agent is attached to the peripheral seal portion of the oxygen absorber package formed by sealing the oxygen absorber with a packaging material and the oxygen detection composition can be seen from both sides. An oxygen scavenger package with an oxygen detection function, which is pasted so as to sandwich it.
Group A: polyethylene, polypropylene, polyester, polyamide, polycarbonate, cellulose acetate, cellophane and stretched polypropylene
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17111499A JP4284481B2 (en) | 1999-06-17 | 1999-06-17 | Oxygen detector with oxygen detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17111499A JP4284481B2 (en) | 1999-06-17 | 1999-06-17 | Oxygen detector with oxygen detection function |
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| JP2001002146A JP2001002146A (en) | 2001-01-09 |
| JP4284481B2 true JP4284481B2 (en) | 2009-06-24 |
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| JP17111499A Expired - Fee Related JP4284481B2 (en) | 1999-06-17 | 1999-06-17 | Oxygen detector with oxygen detection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003029786A1 (en) * | 2001-10-03 | 2003-04-10 | University Of Western Sydney | Detection and measurement of oxygen permeation across a film |
| JP4382816B2 (en) * | 2004-08-11 | 2009-12-16 | 日本電信電話株式会社 | Ozone gas sensing element |
| JP4816907B2 (en) * | 2006-01-06 | 2011-11-16 | 凸版印刷株式会社 | Ink composition for oxygen indicator, oxygen indicator using the same, and packaging material containing oxygen indicator |
| JP4895667B2 (en) * | 2006-04-28 | 2012-03-14 | パウダーテック株式会社 | Manufacturing method of oxygen detector |
| JP2015155853A (en) * | 2014-02-21 | 2015-08-27 | 三菱瓦斯化学株式会社 | Oxygen detection agent composition |
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