JP4855145B2 - 医療器の製造方法 - Google Patents
医療器の製造方法 Download PDFInfo
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- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
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- B29C66/05—Particular design of joint configurations
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- B29C66/124—Tongue and groove joints
- B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
- B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
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- B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
- B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
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- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
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- B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
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- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
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Description
本発明の製造方法においては、まず、医療用チューブを準備する。
本発明の医療器の製造方法においては、上記の医療用チューブに加えて、医療用チューブと接合される被接合部材を準備する。被接合部材の具体的な形態は、医療用チューブと接合されうる部材であれば特に制限されず、医療器の分野において従来公知の知見が適宜参照されうる。被接合部材の一例を挙げると、点滴筒、瓶針、三方活栓、混注サイト、ロックコネクタ、針、ルアーコネクタ、ニードルレスコネクタ、マニホールド類などが例示されうる。ただし、これらの形態のみに限定されることはなく、その他の部材が被接合部材として用いられても、勿論よい。
本発明の製造方法においては、上記で準備した医療用チューブと被接合部材との接合部へ赤外線を照射する。これにより、医療用チューブの特定の層に含有される赤外線吸収剤が当該赤外線を吸収して、発熱する。そして、この熱によって、医療用チューブの、接合部となる層が溶融して被接合部材と溶着し、接合が達成される。
本発明の方法によれば、上記の医療用チューブと上記の被接合部材とが簡便な手法により接合されて、医療器が製造される。本発明において製造される医療器の用途などの具体的な形態は特に制限されず、医療器の分野において従来公知の知見が適宜参照されうる。一例を挙げると、本発明の製造方法により製造される医療器は、例えば、輸液セット、延長チューブ、延長チューブ付三方活栓、CAPD回路、血液回路などの用途に好適に用いられうる。
[通常条件]
医療用チューブまたは被接合部材のいずれか一方を閉塞させた状態で水中に沈め、他方から196kPaのゲージ圧にて1分間空気を送り込み、空気の漏れを確認する。この際に空気の漏れが確認されなければ、通常条件下における気密性は196kPa以上であると判定する。
医療用チューブ内に脂肪乳剤を満たし、接合部位に20Nの押し抜き荷重を10回与えた後、上記の通常条件と同様の状態で水中に沈め、500kPaのゲージ圧にて1分間空気を送り込み、空気の漏れを確認する。この際に空気の漏れが確認されなければ、過酷条件下における気密性は500kPa以上であると判定する。
医療用チューブと被接合部材とが接合されてなる医療器の接合部位に、20Nの押し抜き荷重を10回与える。このサンプルに対して、引張試験機(株式会社島津製作所製、オートグラフAG−IS)を用いて200mm/minの引張り荷重を与え、接合部に抜けが生じた際の引張り強度を接合強度とする。
3層構造を有するチューブ(外径3.4mm、内径2.1mm)を、三層押し出し機を用いて作製した。ここで、各実施例におけるチューブの各層の構成材料を下記の表1および表2に示す。なお、実施例1−12、18および19、並びに比較例1および2において、チューブ中層の構成材料には、赤外線吸収剤であるPRO JET 925NP(商品名、Avecia株式会社製)を0.02phrの添加量で添加した。また、実施例13−15および比較例3において、チューブ中層の構成材料には、赤外線吸収剤であるLumogen IR788(商品名、BASF社製)を0.02phrの添加量で添加した。さらに、実施例16および17において、チューブ内層の構成材料には、赤外線吸収剤であるPRO JET 925NP(商品名、Avecia株式会社製)を0.02phrの添加量で添加した。
実施例8および9:ポリプロピレン(日本ポリプロ株式会社製、商品名:ウィンテックWFX4T);
実施例10および11:ポリエチレン(日本ポリエチレン株式会社製、商品名:HB530);
実施例12:ポリカーボネート(三菱エンジニアリングプラスチックス株式会社製、商品名:RS1001R)。
実施例13−15および比較例3:出力30W、照射径φ3、速度5mm/秒、波長808nm;
実施例18および19:出力15W、照射径φ3、速度5mm/秒、波長940nm。
上記の手法により得られたチューブ−コネクタ接合体に対し、外観評価を行った。外観評価の具体的な手法は以下の通りである。
赤外線を照射した部分の外表面の変形(陥没)や破れの有無を目視にて確認した。なお、表1および表2においては、外観評価において明らかに異常と思われたものを「×」と示し、それ以外を「○」と示す。
上記の手法により得られたチューブ−コネクタ接合体に対し、荷重負荷試験を行った。荷重負荷試験の具体的な手法は以下の通りである。
接合部に約20Nの押し抜き荷重を10回与える。荷重負荷後のサンプルを引張試験機(株式会社島津製作所製、オートグラフAG−IS)を用いて200mm/minで引張り荷重を負荷した際の接合部における「抜け」の有無を確認する。また、サンプルにおいて「抜け」が確認された場合には、「抜け」の発生時の強度を確認する。
上記の実施例1および実施例2において得られたチューブ−コネクタ接合体について、上述した気密性の測定方法の過酷条件の手法に従って、チューブからの脂肪乳剤の「漏れ」の有無を確認した。結果を下記の表3に示す。なお、表3において、意地悪試験における「漏れ」が確認されなかったものを「○」と示す。
2 コネクタ、
3 繋ぎ管、
10 内層、
20 中間層、
30 外層。
Claims (7)
- 医療用チューブと被接合部材との接合部へ赤外線を照射することにより、前記医療用チューブと前記被接合部材とを加熱溶着により接合する工程を有する、医療用チューブおよび被接合部材を備えた医療器の製造方法であって、
前記医療用チューブが3層以上からなる多層構造を有し、前記多層構造の被接合部材との接合部となる層以外の層が赤外線吸収剤を含有し、前記医療用チューブの総断面積に対する前記赤外線吸収剤を含有する層の断面積の比率が2〜60%であり、
前記医療用チューブが、下記数式Aまたは下記数式B:
を満足することを特徴とする、医療器の製造方法。 - 前記赤外線吸収剤を含有する層における前記赤外線吸収剤の含有量が、当該層を構成する樹脂100質量部に対して0.01〜1.0質量部(phr)である、請求項1に記載の製造方法。
- 前記接合部へ実質的に一方向から前記赤外線を照射して、前記接合部の実質的に全周を加熱溶着により接合する、請求項1または2に記載の製造方法。
- 前記医療用チューブが実質的に透明である、請求項1〜3のいずれか1項に記載の製造方法。
- 前記医療用チューブの最内層および前記被接合部材の流路面を構成する材料がオレフィン系重合体である、請求項1〜4のいずれか1項に記載の製造方法。
- 前記被接合部材が、点滴筒、瓶針、三方活栓、混注サイト、ロックコネクタ、針、ルアーコネクタ、ニードルレスコネクタ、およびマニホールド類からなる群から選択される部材である、請求項1〜5のいずれか1項に記載の製造方法。
- 請求項1〜6のいずれか1項に記載の製造方法により製造され、気密性が通常条件下において196kPa以上であり、接合強度が30N以上であることを特徴とする、医療器。
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JP6051786B2 (ja) * | 2011-11-04 | 2016-12-27 | 株式会社ジェイ・エム・エス | 医療用三層チューブおよび三層チューブの押出成形方法 |
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