JP3575616B2 - Patch structure - Google Patents

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Publication number
JP3575616B2
JP3575616B2 JP14213092A JP14213092A JP3575616B2 JP 3575616 B2 JP3575616 B2 JP 3575616B2 JP 14213092 A JP14213092 A JP 14213092A JP 14213092 A JP14213092 A JP 14213092A JP 3575616 B2 JP3575616 B2 JP 3575616B2
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Japan
Prior art keywords
patch
pressure
sensitive adhesive
adhesive layer
drug
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JP14213092A
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Japanese (ja)
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JPH05305108A (en
Inventor
崇光 村岡
隆士 木之下
仁 明見
和広 東尾
三郎 大塚
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Nitto Denko Corp
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Nitto Denko Corp
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Description

【0001】
【産業上の利用分野】
本発明は皮膚面に貼付する貼付剤の包装構造に関し、詳しくは有機液状成分を含有する粘着剤を用いた貼付剤を包装した場合に、含有する液状成分が包装材料に吸着移行しにくい包装構造に関するものである。
【0002】
【従来の技術】
従来から皮膚面に貼付する貼付剤に用いられる粘着剤としては、ゴム系やアクリル系、シリコーン系、ビニルエーテル系などからなる皮膚に対して安全性の高い粘着剤が使用されている。また、粘着剤としては液状成分を含有するタイプと含有しないタイプに大別され、液状成分を含有するタイプには液状成分が水である含水ゲルタイプと、油状成分である油性ゲルタイプに分けられる。
【0003】
一方、上記貼付剤は粘着面を通常、剥離紙にて被覆保護した状態で供されているが、各貼付剤を個別包装したり、複数枚の貼付剤を一括包装しているのが一般的であり、特に粘着剤層中に薬物を含有させた経皮吸収用貼付剤では、保存中での品質保持などの点から密閉性の包装材料にて密封包装されているのが現状である。
【0004】
しかしながら、上記貼付剤のうち液状成分として油状成分を粘着剤中に含有する貼付剤を包装材料にて包装した場合、包装材料の内面に貼付剤が接触することによって油状成分が吸着、移行して粘着剤中の油状成分の含有量が変化し、粘着特性に変動をきたす恐れがある。また、経皮吸収用貼付剤の場合では含有する薬物の経皮吸収性の低下や、含有薬物自体の吸着により薬理効果の低下を起こすことが考えられる。
【0005】
上記貼付剤のうち経皮吸収用の貼付剤では、近年、貼付時の皮膚刺激性の低減や薬物の吸収持続性などの点から、貼付剤の小型化や粘着剤層の厚みの増大化、薬物含有量の高濃度化などが図られており、それに伴い包装材料内面への上記油状成分や薬物の吸着、移行による問題が貼付剤の製造、開発に当たって重要な問題になりつつある。特に、薬物を含有する貼付剤の場合、薬物含量の変動や経皮吸収性の変動は製剤化に当たって最小限度に抑制しなければならない課題であり、これらの問題を解決する技術の提供が望まれているのが実情である。
【0006】
【発明が解決しようとする課題】
そこで、本発明者らは油状物質を含有する粘着剤層を有する貼付剤を包装した場合に、油状成分が包装材料内面に吸着移行せず、また薬物を含有する貼付剤を包装した場合には薬物の吸着移行をも防止できる包装構造を得るべく鋭意検討を行なった。その結果、特定の有機液状成分を含有する粘着剤層を有する貼付剤を包装する場合、用いる包装材料の内面層に特定の性質を有するプラスチック材料を用いることによって上記有機液状成分の吸着移行が防止でき、この包装材料が脂溶性薬物の吸着も防止することを見い出し、本発明を完成するに至った。
【0007】
【課題を解決するための手段】
即ち、本発明は融点が25℃以下の有機液状成分としての脂肪酸エステルおよび/またはグリセリンエステル40〜70重量%を相溶状態にて含有する粘着剤層を支持体の片面に設けた貼付剤全体を密封包装してなる包装構造であって、包装材料は積層体であり、その内面は溶解度パラメータ9以上のプラスチック材料としてのエチレン/ビニルアルコール共重合体フィルムまたはアクリロニトリル/メチルアクリレート共重合体フィルムから形成されていることを特徴とする貼付剤の包装構造を提供するものである。
【0008】
また、薬物として室温下、水100mlに対する溶解量が0.4g以下の脂溶性薬物を含有する貼付剤の場合にも効果的な包装構造を提供するものである。
【0009】
本発明の包装構造にて包装される貼付剤は、粘着剤層が支持体の片面に設けられたものであり、所謂テープ状もしくはシート状の形状を有する。支持体としては、粘着剤層を保持できるものであれば材質には制限はない。好ましくは粘着剤層中に含有する有機液状成分や薬物などが支持体内を通って背面から失われて含量低下を生じないもの、即ちこれらの成分が透過しない材質からなるものが好ましい。具体的にはポリエステル、ナイロン、サラン、ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、ポリ塩化ビニル、エチレン−アクリル酸エチル共重合体、ポリテトラフルオロエチレン、サーリン、金属箔などの単独フィルムまたはこれらのラミネートフィルムなどを用いることができる。これらのうち、支持体と後述の粘着剤層との間の接着性(投錨性)を向上させるために、支持体を上記材質からなる無孔シートと紙、不織布、織布などの多孔シートとのラミネートシートとし、多孔シート側に粘着剤層を形成することが好ましい。このような支持体の厚みは貼付剤の柔軟性を考慮すると10〜500μm、好ましくは10〜200μm程度の範囲とする。
【0010】
本発明において上記支持体の片面に設けられた粘着剤層は、皮膚面に貼着するためのものであって、該層中には融点25℃以下の有機液状成分が粘着剤主成分と相溶した状態にて含有されて、所謂油性ゲル状態となっている。粘着剤としては皮膚面に対して非刺激性であれば、(メタ)アクリル酸アルキルエステルを主成分単量体として重合したアクリル系粘着剤や、シリコーンゴム、ポリイソブチレンゴム、ポリイソプレンゴム、ポリブタジエンゴム、スチレン/イソプレン(またはブタジエン)/スチレンブロック共重合体ゴム、アクリル系ゴム、アラビアゴムなどゴム系粘着剤、ポリビニルアルキルエーテルからなるビニルエーテル系粘着剤、ポリオルガノシロキサンを主成分とするシリコーン系粘着剤などを用いることができる。これらの粘着剤のうち、比較的安定した品質の維持や皮膚に対する非刺激性、粘着特性の調整の容易さなどからアクリル系粘着剤が好ましく採用できる。
【0011】
また、上記粘着剤層は必要に応じて多官能性単量体の共重合化や公知の架橋剤の配合、電離性放射線の照射などによる架橋処理を施してもよい。特に、後述する有機液状成分を多量に含有する場合には粘着剤層が可塑化されるので、凝集力を高めて適用皮膚面への糊残り現象を防止する目的で架橋処理を施すことが好ましい。
【0012】
本発明における上記粘着剤層には上記粘着剤と共に、粘着剤と相溶する有機液状成分が含有されている。有機液状成分は粘着剤層を可塑化してソフト感を付与して皮膚刺激性を低減させたり、また、薬物が併存する場合には薬物の経皮吸収性を向上させたり、薬物溶解度を向上させたりする作用を発揮する。本発明の包装構造ではこのような有機液状成分は貼付剤の粘着剤層中に40〜70重量%という比較的多くの量が含有されている。含有量が40重量%満たない場合は、従来の包装材料を用いても包装材料への吸着移行現象が顕著に現れず、本発明の利点が充分に発揮されない。一方、70重量%を超えて含有すると、粘着剤層が可塑化されすぎて極度に凝集力が低下し、皮膚面からの剥離時に糊残り現象が起こったり、皮膚刺激性が増大して貼付剤としては実用的でない。
【0013】
このような有機液状成分は融点が25℃以下のものとして、脂肪酸エステルおよび/またはグリセリンエステルを用いることができ、脂肪酸エステルとしては具体的にはジイソプロピルアジペート、フタル酸エステル、ミリスチン酸イソプロピル、ミリスチン酸イソトリデシル、ラウリル酸エチル、オレイン酸エチル、アジピン酸ジイソプロピル、パルミチン酸イソプロピル、パルミチン酸オクチルなどが挙げられ、これらのうち一種以上が配合されている。これらの液状成分は常温で揮散性の低いものが好ましく、着香料などの常温で揮散性の高い成分では揮散による吸着が生じるので、本発明の効果が充分に発揮されにくくなる。
【0014】
上記粘着剤層には薬物を経皮吸収させて各種疾患の治療または予防を行う貼付剤とすることができる。本発明では有機液状成分や粘着剤と相溶しやすく、しかも従来の包装材料に吸着されやすい脂溶性薬物を用いた場合に、本発明の効果が最大限に発揮できて好ましい。なお、本明細書において脂溶性薬物とは、常温下で水100mlに対する溶解量が0.4g以下である溶解度の薬物を意味するものである。具体的にはコルチコステロイド類、鎮痛消炎剤、催眠鎮静剤、精神安定剤、抗高血圧剤、降圧利尿剤、抗生物質、麻酔剤、抗菌剤、抗真菌剤、ビタミン剤、冠血管拡張剤、抗ヒスタミン剤、鎮咳剤、性ホルモン、抗うつ剤、脳循環改善剤、制吐剤、抗腫瘍剤、生体医薬などの種類の薬物であって、経皮吸収可能な薬物が使用でき、これらの薬物は必要に応じて2種類以上併用することができる。
【0015】
これらの薬物の含有量は薬物種や投与目的に応じて適宜設定することができるが、通常、粘着剤層中に1〜40重量%、好ましくは2〜30重量%程度含有させる。含有量が1重量%に満たない場合は治療に有効な量の薬物放出が期待できず、また、40重量%を超えると治療効果に限界が生じると共に経済的に不利である。
【0016】
本発明の包装構造は、上記貼付剤を包装材料にて個別にもしくは一括して包装してなるものである。包装に用いる材料はその内面、つまり貼付剤に接する側が溶解度パラメータ(以下、SP値という)が9以上で、厚みが10〜50μm程度のプラスチック材料から形成される。SP値が9未満の材料では有機液状成分や薬物との親和性がよいので包装材料に接触した場合の吸着移行防止効果が充分ではなく好ましくない。このようなSP値を有する包装材料のうち、有機液状成分や薬物の吸着移行をさらに確実に阻止するには融点が200℃以上の材料を用いることが好ましい。
【0017】
このような包装材料としては、具体的にはエチレン/ビニルアルコール共重合体またはアクリロニトリル/メチルアクリレート共重合体から形成されているフィルムもしくはシートを採用できる。これらの包装材料はこれらの材料層を内面層として各種プラスチックフィルムや金属箔とを積層した積層体であり、また、最外層に金属蒸着や塗料コーテング、印刷などを施した包装材料であってもよい。
【発明の効果】
本発明は以上のように特定の有機液状成分と必要に応じて薬物も含有する貼付剤の包装構造であり、貼付剤に接する包装材料の内面層に特定の包装材料を用いているので、保存中での有機液状成分や薬物の吸着移行が防止でき、包装される貼付剤の品質の安定化が図れるものである。
【0018】
【実施例】
以下に本発明の実施例を示し、さらに具体的に説明する。なお、以下において、部および%は重量部および重量%を意味する。
【0019】
実施例1
不活性ガス雰囲気下でアクリル酸2−エチルヘキシルエステル95部、アクリル酸5部を酢酸エチル中で共重合させてアクリル系粘着剤溶液を調製した。
【0020】
この溶液の固形分50部にパルミチン酸オクチルエステル(融点−2℃)50部を加え、さらにアクリル系粘着剤の固形分99.8部に対して0.2部のエチルアセトアセテートアルミニウムジイソプロピレートを10%アセチルアセトン溶液として添加して、これをポリエステル製のセパレータ上に乾燥後の厚みが80μmとなるように塗布、乾燥して架橋された粘着剤層を形成したのち、この粘着剤層をポリエステル製不織布(12g/m)/ポリエステルフィルム(2μm厚)積層支持体の不織布面に貼り合わせて貼付剤を作製した。
【0021】
作製した貼付剤を20cmの大きさに裁断し、内面層がエチレン/ビニルアルコール共重合体フィルム(SP値10、融点220℃)で、外層がポリエステル/アルミニウム蒸着フィルムである積層構造の包装材料にて密封包装し、本発明の包装構造を得た。
【0022】
実施例2
実施例1にて粘着剤層中に含有するパルミチン酸オクチルエステルを、ミリスチン酸イソプロピルエステル(融点3℃)に代えた以外は、実施例1と同様にして本発明の貼付剤の包装構造を得た。
【0023】
実施例3
実施例1にて用いた包装材料をアクリロニトリル/メチルアクリレート共重合体フィルム(SP値12、融点330℃)に代えた以外は、実施例1と同様にして本発明の貼付剤の包装構造を得た。
【0024】
実施例4
実施例2にて用いた包装材料をアクリロニトリル/メチルアクリレート共重合体フィルム(SP値12、融点330℃)に代えた以外は、実施例2と同様にして本発明の貼付剤の包装構造を得た。
【0025】
比較例1
実施例1にて用いた包装材料をポリエチレンフィルム(SP値7、融点140℃)に代えた以外は、実施例1と同様にして貼付剤の包装構造を得た。
【0026】
比較例2
実施例2にて用いた包装材料をポリエチレンフィルム(SP値7、融点140℃)に代えた以外は、実施例1と同様にして貼付剤の包装構造を得た。
【0027】
比較例3
比較例1において貼付剤の裁断する大きさを50cmとした以外は、比較例1と同様にして貼付剤の包装構造を得た。
【0028】
比較例4
比較例1において粘着剤層の厚みを120μmとした以外は、比較例1と同様にして貼付剤の包装構造を得た。
【0029】
実施例5
実施例1にて調整したアクリル系粘着剤溶液の固形分50部にパルミチン酸オクチルエステル(融点−2℃)40部と、プロプラノロール(フリー体)10部を加えた以外は、実施例1と同様にして架橋処理して経皮吸収用の貼付剤を作製した。
【0030】
作製した貼付剤を20cmの大きさに裁断し、内面層がアクリロニトリル/メチルアクリレート共重合体フィルム(SP値12、融点330℃)で、外層がポリエステル/アルミニウム蒸着フィルムである積層構造の包装材料にて密封包装し、本発明の包装構造を得た。
【0031】
実施例6
実施例5にて粘着剤層中に含有するパルミチン酸オクチルエステルを、ミリスチン酸イソプロピルエステル(融点3℃)に代えた以外は、実施例5と同様にして本発明の貼付剤の包装構造を得た。
【0032】
比較例5
実施例5にて用いた包装材料をポリエチレンフィルム(SP値7、融点140℃)に代えた以外は、実施例5と同様にして貼付剤の包装構造を得た。
【0033】
比較例6
実施例6にて用いた包装材料をポリエチレンフィルム(SP値7、融点140℃)に代えた以外は、実施例6と同様にして貼付剤の包装構造を得た。
【0034】
比較例7
実施例2にて用いた包装材料をエチレン/メタクリル酸共重合体フィルム(SP値8、融点95℃)に代えた以外は、実施例1と同様にして貼付剤の包装構造を得た。
【0035】
参考例1
実施例1にて調整したアクリル系粘着剤溶液の固形分90部にプロプラノロール(フリー体)10部を加え、これをポリエステル製のセパレータ上に乾燥後の厚みが40μmとなるように塗布、乾燥して架橋された粘着剤層を形成したのち、実施例1と同様の支持体に貼り合わせて経皮吸収用の貼付剤を作製した。
【0036】
作製した貼付剤を20cmの大きさに裁断し、内面層がアクリロニトリル/メチルアクリレート共重合体フィルム(SP値12、融点330℃)で、外層がポリエステル/アルミニウム蒸着フィルムである積層構造の包装材料にて密封包装し、貼付剤の包装構造を得た。
【0037】
参考例2
参考例1にて用いた包装材料をポリエチレンフィルム(SP値7、融点140℃)に代えた以外は、参考例1と同様にして貼付剤の包装構造を得た。
【0038】
上記各実施例、比較例、参考例にて得た包装構造体を25℃×75%RH、40℃×75%RHの恒温加湿条件下に6か月間保存したのち、下記試験により吸着移行率を測定し、その結果を表1に示した。
【0039】
〔液状成分の吸着移行率〕
保存前と後の各サンプルをメチルアルコール中に浸漬し、含有する有機液状成分を抽出してガスクロマトグラフィーにて定量し、残存量から包装材料への吸着移行率を算出した。
【0040】
〔薬物の吸着移行率〕
保存前と後における薬物を含有する各サンプルをメチルアルコール中に浸漬し、含有する薬物を抽出して液体クロマトグラフィーにて定量し、残存量から包装材料への吸着移行率を算出した。
【0041】
【表1】

Figure 0003575616
[0001]
[Industrial applications]
The present invention relates to a packaging structure for a patch to be applied to the skin surface, and more particularly, to a packaging structure in which when a patch using an adhesive containing an organic liquid component is packaged, the contained liquid component is less likely to be adsorbed and transferred to the packaging material. It is about.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a pressure-sensitive adhesive used for a patch stuck to a skin surface, a pressure-sensitive adhesive made of rubber, acrylic, silicone, vinyl ether, or the like, which is highly safe for skin, has been used. The pressure-sensitive adhesives are roughly classified into a type containing a liquid component and a type not containing a liquid component. The types containing a liquid component are classified into a hydrogel type in which the liquid component is water and an oily gel type in which the oil component is an oil component. .
[0003]
On the other hand, the above-mentioned patches are usually provided in a state where the adhesive surface is covered and protected with release paper, but it is common to individually package each patch or package a plurality of patches at once. In particular, the patch for transdermal absorption containing a drug in the adhesive layer is currently hermetically packaged with a hermetic packaging material from the viewpoint of maintaining the quality during storage.
[0004]
However, when the patch containing the oil component in the adhesive as a liquid component of the patch is packaged in a packaging material, the oil component is adsorbed and transferred by the contact of the patch with the inner surface of the packaging material. The content of the oily component in the pressure-sensitive adhesive changes, which may cause fluctuations in the pressure-sensitive adhesive properties. Further, in the case of a patch for transdermal absorption, it is conceivable that the transdermal absorbability of the contained drug is reduced, and the pharmacological effect is reduced by the adsorption of the contained drug itself.
[0005]
Among the above-mentioned patches, in the patch for percutaneous absorption, in recent years, from the viewpoint of reduction of skin irritation at the time of application and sustainability of drug absorption, downsizing of the patch and increase in the thickness of the adhesive layer, As the drug content is increased, the problem of adsorption and transfer of the oily component and the drug to the inner surface of the packaging material is becoming an important problem in the production and development of patches. In particular, in the case of a patch containing a drug, a change in drug content and a change in transdermal absorbability are issues that must be suppressed to a minimum during formulation, and it is desired to provide a technique for solving these problems. That is the fact.
[0006]
[Problems to be solved by the invention]
Therefore, the present inventors, when packaging a patch having an adhesive layer containing an oily substance, when the oil component does not adsorb and transfer to the inner surface of the packaging material, and when packaging a patch containing a drug, Intensive study was conducted to obtain a packaging structure that can prevent the transfer of the drug by adsorption. As a result, when a patch having an adhesive layer containing a specific organic liquid component is packaged, adsorption and transfer of the organic liquid component is prevented by using a plastic material having specific properties for the inner surface layer of the packaging material used. The present inventors have found that this packaging material also prevents the adsorption of fat-soluble drugs, and have completed the present invention.
[0007]
[Means for Solving the Problems]
That is, the present invention relates to an entire patch having a pressure-sensitive adhesive layer containing 40 to 70% by weight of a fatty acid ester and / or a glycerin ester as an organic liquid component having a melting point of 25 ° C. or less in a compatible state on one surface of a support. The packaging material is a laminate, and the inner surface of the packaging material is made of an ethylene / vinyl alcohol copolymer film or an acrylonitrile / methyl acrylate copolymer film as a plastic material having a solubility parameter of 9 or more. It is intended to provide a patch packaging structure characterized by being formed.
[0008]
Further, the present invention provides an effective packaging structure even for a patch containing a fat-soluble drug whose solubility in 100 ml of water is 0.4 g or less at room temperature as a drug.
[0009]
The patch packaged in the packaging structure of the present invention has a pressure-sensitive adhesive layer provided on one surface of a support, and has a so-called tape-like or sheet-like shape. The material of the support is not limited as long as it can hold the pressure-sensitive adhesive layer. Preferably, an organic liquid component or a drug contained in the pressure-sensitive adhesive layer is lost from the back surface through the support to cause no decrease in the content, that is, a material made of a material through which these components do not pass. Specifically, polyester, nylon, Saran, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, ethylene-ethyl acrylate copolymer, polytetrafluoroethylene, Surlyn, single film such as metal foil or these And the like can be used. Among these, in order to improve the adhesiveness (anchoring property) between the support and the pressure-sensitive adhesive layer described below, the support is made of a non-porous sheet made of the above-described material and a porous sheet such as paper, nonwoven fabric, or woven fabric. It is preferable that the adhesive sheet is formed on the porous sheet side. The thickness of such a support is in the range of 10 to 500 μm, preferably about 10 to 200 μm in consideration of the flexibility of the patch.
[0010]
In the present invention, the pressure-sensitive adhesive layer provided on one surface of the support is for sticking to the skin surface, and an organic liquid component having a melting point of 25 ° C. or less is in the layer and is compatible with the main component of the pressure-sensitive adhesive. It is contained in a dissolved state and is in a so-called oily gel state. If the adhesive is non-irritating to the skin surface, an acrylic adhesive obtained by polymerizing an alkyl (meth) acrylate as a main monomer, silicone rubber, polyisobutylene rubber, polyisoprene rubber, polybutadiene Rubber, styrene / isoprene (or butadiene) / styrene block copolymer rubber, rubber-based adhesive such as acrylic rubber, arabic rubber, vinyl ether-based adhesive composed of polyvinyl alkyl ether, silicone-based adhesive containing polyorganosiloxane as a main component Agents and the like can be used. Among these pressure-sensitive adhesives, acrylic pressure-sensitive adhesives can be preferably used from the viewpoint of maintaining relatively stable quality, non-irritating property to the skin, and easy adjustment of the adhesive properties.
[0011]
Further, the pressure-sensitive adhesive layer may be subjected to crosslinking treatment by copolymerization of a polyfunctional monomer, blending of a known crosslinking agent, irradiation of ionizing radiation, or the like, if necessary. In particular, when a large amount of an organic liquid component described later is contained, the pressure-sensitive adhesive layer is plasticized, so that it is preferable to perform a cross-linking treatment for the purpose of increasing the cohesive force and preventing the adhesive residue phenomenon on the applied skin surface. .
[0012]
The pressure-sensitive adhesive layer in the present invention contains, together with the pressure-sensitive adhesive, an organic liquid component compatible with the pressure-sensitive adhesive. The organic liquid component plasticizes the pressure-sensitive adhesive layer to give a soft feeling and reduce skin irritation, and when a drug coexists, improves the transdermal absorbability of the drug or improves drug solubility. Demonstrate the effect of or. In the packaging structure of the present invention, such an organic liquid component is contained in the adhesive layer of the patch in a relatively large amount of 40 to 70% by weight. When the content is less than 40% by weight, even when a conventional packaging material is used, the phenomenon of adsorption transfer to the packaging material does not appear remarkably, and the advantages of the present invention are not sufficiently exhibited. On the other hand, if the content exceeds 70% by weight, the pressure-sensitive adhesive layer is excessively plasticized, and the cohesive force is extremely reduced. It is not practical.
[0013]
Fatty acid esters and / or glycerin esters can be used as such organic liquid components having a melting point of 25 ° C. or less. Specific examples of the fatty acid esters include diisopropyl adipate, phthalic acid ester, isopropyl myristate, and myristic acid. Isotridecyl, ethyl laurate, ethyl oleate, diisopropyl adipate, isopropyl palmitate, octyl palmitate and the like are included, and one or more of these are blended. It is preferable that these liquid components have low volatility at room temperature, and components having high volatility at room temperature, such as flavorings, are adsorbed by volatilization, so that the effect of the present invention is not sufficiently exhibited.
[0014]
The adhesive layer can be used as a patch for treating or preventing various diseases by percutaneously absorbing a drug. In the present invention, it is preferable to use a fat-soluble drug which is easily compatible with the organic liquid component and the adhesive and is easily adsorbed to the conventional packaging material, since the effects of the present invention can be maximized. In addition, in this specification, the fat-soluble drug means a drug having a solubility of 0.4 g or less in 100 ml of water at normal temperature. Specifically, corticosteroids, analgesics and anti-inflammatory agents, hypnotics, tranquilizers, antihypertensives, antihypertensive diuretics, antibiotics, anesthetics, antibacterials, antifungals, vitamins, coronary vasodilators, Antihistamines, antitussives, sex hormones, antidepressants, cerebral circulation improvers, antiemetic agents, antitumor agents, biopharmaceuticals and other types of drugs that can be used percutaneously can be used. Two or more types can be used in combination depending on the situation.
[0015]
The content of these drugs can be appropriately set according to the kind of the drug and the purpose of administration, but is usually contained in the pressure-sensitive adhesive layer at about 1 to 40% by weight, preferably about 2 to 30% by weight. If the content is less than 1% by weight, a therapeutically effective amount of the drug cannot be expected to be released, and if it exceeds 40% by weight, the therapeutic effect is limited and economically disadvantageous.
[0016]
The packaging structure of the present invention is such that the above-mentioned patches are individually or collectively packaged in a packaging material. The material used for packaging is formed of a plastic material having a solubility parameter (hereinafter referred to as SP value) of 9 or more and a thickness of about 10 to 50 μm on the inner surface, that is, the side in contact with the patch. A material having an SP value of less than 9 has a good affinity for an organic liquid component or a drug, and thus has an insufficient effect of preventing the transfer of adsorption when it comes into contact with a packaging material, which is not preferable. Among the packaging materials having such an SP value, it is preferable to use a material having a melting point of 200 ° C. or higher in order to more reliably prevent the transfer of the organic liquid component or drug by adsorption.
[0017]
As such a packaging material, specifically, a film or sheet formed from an ethylene / vinyl alcohol copolymer or an acrylonitrile / methyl acrylate copolymer can be employed. These packaging materials are laminates obtained by laminating various plastic films or metal foils with these material layers as inner layers, and even the outermost layers are subjected to metal vapor deposition, paint coating, printing, etc. Good.
【The invention's effect】
The present invention is a packaging structure of a patch containing a specific organic liquid component and a drug as necessary as described above, and uses a specific packaging material for the inner layer of the packaging material in contact with the patch, so that it is preserved. It prevents organic liquid components and drugs from being absorbed and transferred therein, and stabilizes the quality of the patch to be packaged.
[0018]
【Example】
Hereinafter, examples of the present invention will be shown and will be described more specifically. In the following, parts and% mean parts by weight and% by weight, respectively.
[0019]
Example 1
Under an inert gas atmosphere, 95 parts of 2-ethylhexyl acrylate and 5 parts of acrylic acid were copolymerized in ethyl acetate to prepare an acrylic pressure-sensitive adhesive solution.
[0020]
50 parts of octyl palmitate (melting point -2 ° C.) was added to 50 parts of the solid content of this solution, and 0.2 part of ethyl acetoacetate aluminum diisopropylate was added to 99.8 parts of the solid content of the acrylic pressure-sensitive adhesive. Is added as a 10% acetylacetone solution, and this is applied on a polyester separator so as to have a thickness of 80 μm after drying, and dried to form a crosslinked pressure-sensitive adhesive layer. A patch was prepared by laminating the nonwoven fabric (12 g / m 2 ) / polyester film (2 μm thick) laminated support on the nonwoven fabric surface.
[0021]
The prepared patch is cut into a size of 20 cm 2 , and a packaging material having a laminated structure in which the inner surface layer is an ethylene / vinyl alcohol copolymer film (SP value 10, melting point 220 ° C.) and the outer layer is a polyester / aluminum vapor-deposited film. To obtain a packaging structure of the present invention.
[0022]
Example 2
The packaging structure of the patch of the present invention was obtained in the same manner as in Example 1, except that octyl palmitate contained in the pressure-sensitive adhesive layer was replaced with isopropyl myristate (melting point: 3 ° C.) in Example 1. Was.
[0023]
Example 3
Except that the packaging material used in Example 1 was replaced with an acrylonitrile / methyl acrylate copolymer film (SP value: 12, melting point: 330 ° C.), the packaging structure of the patch of the present invention was obtained in the same manner as in Example 1. Was.
[0024]
Example 4
A packaging structure for the patch of the present invention was obtained in the same manner as in Example 2, except that the packaging material used in Example 2 was replaced with an acrylonitrile / methyl acrylate copolymer film (SP value 12, melting point 330 ° C.). Was.
[0025]
Comparative Example 1
A patch packaging structure was obtained in the same manner as in Example 1 except that the packaging material used in Example 1 was changed to a polyethylene film (SP value 7, melting point 140 ° C.).
[0026]
Comparative Example 2
A patch packaging structure was obtained in the same manner as in Example 1, except that the packaging material used in Example 2 was changed to a polyethylene film (SP value 7, melting point 140 ° C.).
[0027]
Comparative Example 3
The packaging structure of the patch was obtained in the same manner as in Comparative Example 1 except that the size of the patch cut in Comparative Example 1 was set to 50 cm 2 .
[0028]
Comparative Example 4
A packaging structure for a patch was obtained in the same manner as in Comparative Example 1, except that the thickness of the pressure-sensitive adhesive layer was changed to 120 μm in Comparative Example 1.
[0029]
Example 5
Same as Example 1, except that 40 parts of octyl palmitate (melting point -2 ° C.) and 10 parts of propranolol (free body) were added to 50 parts of the solid content of the acrylic pressure-sensitive adhesive solution prepared in Example 1. To prepare a patch for percutaneous absorption.
[0030]
The prepared patch is cut into a size of 20 cm 2 , and the inner layer is an acrylonitrile / methyl acrylate copolymer film (SP value 12, melting point 330 ° C.) and the outer layer is a polyester / aluminum vapor-deposited laminated packaging material. To obtain a packaging structure of the present invention.
[0031]
Example 6
The packaging structure of the patch of the present invention was obtained in the same manner as in Example 5, except that octyl palmitate contained in the pressure-sensitive adhesive layer was replaced with isopropyl myristate (melting point: 3 ° C) in Example 5. Was.
[0032]
Comparative Example 5
A patch packaging structure was obtained in the same manner as in Example 5, except that the packaging material used in Example 5 was changed to a polyethylene film (SP value 7, melting point 140 ° C).
[0033]
Comparative Example 6
A patch packaging structure was obtained in the same manner as in Example 6, except that the packaging material used in Example 6 was changed to a polyethylene film (SP value 7, melting point 140 ° C).
[0034]
Comparative Example 7
A packaging structure for a patch was obtained in the same manner as in Example 1, except that the packaging material used in Example 2 was changed to an ethylene / methacrylic acid copolymer film (SP value: 8, melting point: 95 ° C).
[0035]
Reference Example 1
10 parts of propranolol (free body) was added to 90 parts of the solid content of the acrylic pressure-sensitive adhesive solution prepared in Example 1, and this was applied on a polyester separator so that the thickness after drying was 40 μm, and dried. After forming a crosslinked pressure-sensitive adhesive layer by lamination, it was bonded to the same support as in Example 1 to prepare a patch for transdermal absorption.
[0036]
The prepared patch is cut into a size of 20 cm 2 , and the inner layer is an acrylonitrile / methyl acrylate copolymer film (SP value 12, melting point 330 ° C.) and the outer layer is a polyester / aluminum vapor-deposited laminated packaging material. And sealed to obtain a patch packaging structure.
[0037]
Reference Example 2
A patch packaging structure was obtained in the same manner as in Reference Example 1, except that the packaging material used in Reference Example 1 was changed to a polyethylene film (SP value 7, melting point 140 ° C.).
[0038]
The packaging structures obtained in the above Examples, Comparative Examples and Reference Examples were stored for 6 months under a constant temperature and humidified condition of 25 ° C. × 75% RH and 40 ° C. × 75% RH. Was measured, and the results are shown in Table 1.
[0039]
(Adsorption transfer rate of liquid component)
Each sample before and after storage was immersed in methyl alcohol, and the contained organic liquid component was extracted and quantified by gas chromatography, and the adsorption transfer rate to the packaging material was calculated from the remaining amount.
[0040]
(Drug adsorption transfer rate)
Each sample containing the drug before and after storage was immersed in methyl alcohol, the drug contained was extracted and quantified by liquid chromatography, and the adsorption transfer rate to the packaging material was calculated from the remaining amount.
[0041]
[Table 1]
Figure 0003575616

Claims (2)

融点が25℃以下の有機液状成分としての脂肪酸エステルおよび/またはグリセリンエステル40〜70重量%を相溶状態にて含有する粘着剤層を支持体の片面に設けた貼付剤全体密封包装してなる包装構造であって、包装材料は積層体であり、その内面は溶解度パラメータ9以上のプラスチック材料としてのエチレン/ビニルアルコール共重合体フィルムまたはアクリロニトリル/メチルアクリレート共重合体フィルムから形成されていることを特徴とする貼付剤の包装構造。The entire patch having a pressure-sensitive adhesive layer containing a fatty acid ester and / or glycerin ester as an organic liquid component having a melting point of 25 ° C. or less in a compatible state on one surface of a support is hermetically packaged. The packaging material is a laminate, the inner surface of which is formed of an ethylene / vinyl alcohol copolymer film or an acrylonitrile / methyl acrylate copolymer film as a plastic material having a solubility parameter of 9 or more. The packaging structure of a patch characterized by the above-mentioned. 室温下、水100mlに対する溶解量が0.4g以下の脂溶性薬物を粘着剤層中に含有してなる請求項1記載の貼付剤の包装構造。The packaging structure for a patch according to claim 1, wherein the pressure-sensitive adhesive layer contains a fat-soluble drug having a solubility of 0.4 g or less in 100 ml of water at room temperature.
JP14213092A 1992-05-06 1992-05-06 Patch structure Expired - Lifetime JP3575616B2 (en)

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