JP7347236B2 - 架橋フッ素樹脂及びその管理方法 - Google Patents
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Description
(架橋フッ素樹脂の特性)
フッ素樹脂は、放射線を照射して架橋させることにより、その構造を安定化させることができる。しかしながら、フッ素樹脂は放射線に対する耐性が低く、放射線の照射により欠陥が生じて変色する場合がある。この欠陥は、耐摩耗性や変形性などのフッ素樹脂の特性に悪影響を及ぼすおそれがある。以下、放射線の照射により架橋したフッ素樹脂を架橋フッ素樹脂と呼ぶ。
本実施の形態に係る架橋フッ素樹脂の品質管理方法によれば、ラマン散乱測定を用いて、架橋フッ素樹脂の放射線の照射により生じた欠陥の有無を判定する。ラマン散乱測定においては、架橋フッ素樹脂の表面に照射されるレーザーのスポット径が測定領域となるため、数μm~数十μmという微小領域内で欠陥の有無を判定することができる。ここで、架橋フッ素樹脂中の欠陥を可能な限り発見しやすくしたり、後述するマッピングの実施などのため、欠陥の有無の判定は、シート状に成形された架橋フッ素樹脂に対して実施することが好ましい。
上述のように、本実施の形態に係る架橋フッ素樹脂の品質管理方法により、微小な欠陥を検出し、検出された微小な欠陥を回復又は除去することにより、微小な欠陥もほとんど含まない架橋フッ素樹脂を得ることができる。
本発明の第2の実施の形態は、架橋フッ素樹脂の品質管理方法に用いる欠陥の測定手段において第1の実施の形態と異なる。以下、第1の実施の形態と同様の点については、説明を省略又は簡略化する場合がある。
本実施の形態に係る架橋フッ素樹脂の品質管理方法によれば、X線回折測定を用いて、架橋フッ素樹脂の放射線の照射により生じた欠陥の有無を判定する。X線回折測定においては、架橋フッ素樹脂の表面に照射されるX線のスポット径が測定領域となるため、およそ数百μmという微小領域内で欠陥の有無を判定することができる。
上述のように、本実施の形態に係る架橋フッ素樹脂の品質管理方法により、微小な欠陥を検出し、検出された微小な欠陥を回復又は除去することにより、微小な欠陥もほとんど含まない架橋フッ素樹脂を得ることができる。
上記実施の形態によれば、放射線照射に起因する、架橋フッ素樹脂に存在し得る目視で確認することのできない微小な欠陥の有無を判定することのできる架橋フッ素樹脂の管理方法を提供することができる。また、その管理方法を用いて微小な欠陥を除去することにより、耐摩耗性や変形性などの特性に優れた架橋フッ素樹脂を提供することができる。
次に、以上説明した実施の形態から把握される技術思想について記載する。
Claims (4)
- 架橋フッ素樹脂の表面を目視して変色の有無を確認する確認工程と、
変色が確認できない前記架橋フッ素樹脂の表面にレーザーを照射し、ラマンスペクトルを測定する測定工程と、
前記ラマンスペクトルにおけるCF2伸縮振動に帰属されるピークの強度に対する蛍光スペクトルの強度に基づいて、前記レーザーが照射された測定領域の品質の合否を判定する合否判定工程と、
を含む、架橋フッ素樹脂の品質管理方法。 - 前記合否判定工程において、前記CF2伸縮振動に帰属されるピークの705~760cm-1の範囲の積分強度に対する前記蛍光スペクトルの767~794cm-1の範囲の積分強度の比の値が0.55以下である場合に前記測定領域の品質を合格と判定する、
請求項1に記載の架橋フッ素樹脂の品質管理方法。 - 前記CF2伸縮振動に帰属されるピークの705~760cm-1の範囲の積分強度、及び前記蛍光スペクトルの767~794cm-1の範囲の積分強度は、バックグラウンドを含んだスペクトルの強度を積分して算出された値である、
請求項2に記載の架橋フッ素樹脂の品質管理方法。 - 前記合否判定工程において不合格と判定された前記測定領域を除去する工程、又は前記架橋フッ素樹脂に熱処理を施し、前記合否判定工程において不合格と判定された前記測定領域の品質を前記合否判定工程において合格と判定される品質まで向上させる工程を含む、
請求項1~3のいずれか1項に記載の架橋フッ素樹脂の品質管理方法。
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US17/152,485 US11946924B2 (en) | 2020-01-24 | 2021-01-19 | Crosslinked fluoropolymer resin and control method for same |
JP2023064874A JP2023093582A (ja) | 2020-01-24 | 2023-04-12 | 架橋フッ素樹脂の品質管理方法及び架橋フッ素樹脂 |
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Citations (4)
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JP2003253007A (ja) | 2002-02-28 | 2003-09-10 | Hitachi Cable Ltd | 改質ふっ素樹脂の製造方法 |
JP2012197347A (ja) | 2011-03-20 | 2012-10-18 | Toyohashi Univ Of Technology | フッ素樹脂成形体及びフッ素樹脂成形体表面改質方法 |
JP2019090794A (ja) | 2017-11-10 | 2019-06-13 | クアーズテック株式会社 | 石英ガラス部材の評価方法及び石英ガラス部材 |
JP2019146338A (ja) | 2018-02-20 | 2019-08-29 | 日清紡メカトロニクス株式会社 | 太陽電池モジュールの寿命予測方法 |
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JPH1038807A (ja) * | 1996-07-23 | 1998-02-13 | Hamamatsu Photonics Kk | プラスチックの判別方法およびプラスチックの判別装置 |
EP1131611A4 (en) * | 1998-06-29 | 2003-01-02 | Univ State San Diego | METHOD AND DEVICE FOR DETERMINING HYDROCARBON COMPOUNDS AND THEIR APPLICATIONS THEREOF |
EP1440987A4 (en) * | 2001-09-26 | 2006-10-18 | Nichias Corp | FLUOROUS RUBBER FORM BODY AND MANUFACTURING METHOD THEREFOR |
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JP2018171557A (ja) | 2017-03-31 | 2018-11-08 | 東レ株式会社 | 多孔質中空糸膜 |
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JP2003253007A (ja) | 2002-02-28 | 2003-09-10 | Hitachi Cable Ltd | 改質ふっ素樹脂の製造方法 |
JP2012197347A (ja) | 2011-03-20 | 2012-10-18 | Toyohashi Univ Of Technology | フッ素樹脂成形体及びフッ素樹脂成形体表面改質方法 |
JP2019090794A (ja) | 2017-11-10 | 2019-06-13 | クアーズテック株式会社 | 石英ガラス部材の評価方法及び石英ガラス部材 |
JP2019146338A (ja) | 2018-02-20 | 2019-08-29 | 日清紡メカトロニクス株式会社 | 太陽電池モジュールの寿命予測方法 |
Non-Patent Citations (1)
Title |
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プラズマを応用した高分子の表面改質,スリーボンド・テクニカルニュース,日本,株式会社スリーボンド,1989年07月10日,第26号,第1頁-第10頁 |
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