JP2010142473A - 針状体の製造方法 - Google Patents
針状体の製造方法 Download PDFInfo
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- A—HUMAN NECESSITIES
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- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
- A61M37/0015—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin by using microneedles
- A61M2037/0053—Methods for producing microneedles
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Abstract
【解決手段】本発明は、樹脂に、前記樹脂の融点よりも沸点もしくは昇華点が低い低分子量成分を含ませる前処理工程と、前記処理を受けた樹脂を、複製版とこれに対向する支持版との間で加圧処理することにより、微小針部と台座部とを備えた針状体に成型するとともに、前記樹脂内の気泡を前記台座部に移動させる工程と、を含む、針状体の製造方法を提供する。
【選択図】図1
Description
図1は、針状体の製造方法を示した模式図である。
針状体を作製するための樹脂12に低分子量成分を含ませる前処理を行う。前記前処理は、樹脂の溶融前もしくは溶融中のいずれの段階で行ってもよく、また、その前処理方法に特に制限はない。例えば、前記前処理は、気体状態の前記低分子量成分が高濃度で充満している雰囲気下にて、樹脂を静置もしくは樹脂を溶融させ針状体を作製してもよい。例えば、具体的には、低分子量成分が水分の場合、湿度50%以上の環境に放置することにより行っても良い。また、図1bに示すように、樹脂12を複製版11内に充填するとき、樹脂周辺部を気体の低分子量成分で充満させてもよい。
複製版11上に樹脂12を充填する。樹脂12の充填方法は、これに限定するものではないが、生産性の観点から、インプリント法、ホットエンボス法、射出成形法、押し出し成形法およびキャスティング法を用いることが望ましい。
樹脂12に加熱溶融処理を行う。加熱溶融処理によって、前記(低分子量成分を含ませる)前処理によって樹脂12内に閉じ込められた低分子量成分が気化し、多数の気泡4が発生する。
支持版13によって樹脂12に対して加圧処理を行う。樹脂12の加熱溶融と同時または加熱溶融後、支持版13を樹脂12に押圧することによって、樹脂12内に発生した多数の気泡4は樹脂内に閉じ込められ、かつ針状体1の微小針部2に存在する気泡4を台座部3に移動させることができる。
支持版13による加圧後、鋳型全体を急冷して樹脂12を硬化させる。樹脂12を硬化させることによって、樹脂12内に閉じ込められた気泡4は空孔4として固定される。支持版13を樹脂から切り離し、複製版11上で成型された樹脂12を複製版11から剥離することによって、台座部3に空孔4が偏在した針状体1を得ることができる。
図2は、第1の実施態様における方法によって作製された針状体の断面図である。
Claims (8)
- 樹脂に、前記樹脂の融点よりも沸点もしくは昇華点が低い低分子量成分を含ませる前処理工程と、
前記処理を受けた樹脂を、複製版とこれに対向する支持版との間で加圧処理することにより、微小針部と台座部とを備えた針状体に成型するとともに、前記樹脂内の気泡を前記台座部に移動させる工程と、
を含む、針状体の製造方法。 - 前記低分子量成分が、水分を主成分とすることを特徴とする、請求項1に記載の方法。
- 前記前処理工程において、前記樹脂を気体状態の前記低分子量成分中に静置する工程を含むことを特徴とする、請求項1または2に記載の方法。
- 前記前処理工程において、前記樹脂を液体状態の前記低分子量成分中に浸漬する工程を含むことを特徴とする、請求項1または2に記載の方法。
- 前記前処理工程は、前記樹脂の溶融前もしくは溶融中に行われることを特徴とする、請求項1または2に記載の方法。
- 前記前処理工程において、前記支持版に前記低分子量成分を表面に塗布する、または前記支持版に前記低分子量成分を含浸することを特徴とする、請求項1または2に記載の方法。
- 請求項1〜6のいずれか1項に記載の方法によって製造された針状体。
- 微小な空孔が高密度で多数存在する台座部と、
前記台座部上にアレイ状に一体成型された複数の微小針と、
を備える針状体。
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013116219A (ja) * | 2011-12-02 | 2013-06-13 | Toppan Printing Co Ltd | 針状体の製造方法および針状体の転写版 |
CN103301563A (zh) * | 2013-06-20 | 2013-09-18 | 吴传斌 | 可溶性同轴锥多层微针、微针阵列及其制备方法 |
WO2014181674A1 (ja) * | 2013-05-07 | 2014-11-13 | 日本写真印刷株式会社 | 経皮投与用貼付剤の製造方法及び経皮投与用貼付剤 |
CN104780966A (zh) * | 2012-11-13 | 2015-07-15 | 富士胶片株式会社 | 模塑成形体和经皮吸收片的制造方法 |
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CN106902453B (zh) * | 2017-03-07 | 2019-11-29 | 莆田学院 | 一种针体可溶而基底不可溶的微针制备方法 |
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