JP7083477B2 - ポリマー及び窒化ホウ素の複合材料を含む可撓性電子デバイスのロールツーロール加工に使用可能なフィルム - Google Patents
ポリマー及び窒化ホウ素の複合材料を含む可撓性電子デバイスのロールツーロール加工に使用可能なフィルム Download PDFInfo
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Description
小板形状の六方晶窒化ホウ素粒子を含む六方晶窒化ホウ素粒子及びポリマーを提供することと、
六方晶窒化ホウ素粒子とポリマーとを混合して、粉末混合物を得ることと、
粉末混合物を円筒形状に形成することにより、中心軸を有する成形円筒体を得ることであって、小板形状の六方晶窒化ホウ素粒子が、成形円筒体の中心軸に垂直な好適な配向を有する、成形円筒体を得ることと、
成形円筒体を焼結することにより、中心軸を有する焼結体を得ることであって、小板形状の六方晶窒化ホウ素粒子が、焼結体の中心軸に垂直な好適な配向を有する、焼結体を得ることと、
焼結体をその中心軸の周りに回転させ、焼結体からフィルムを径方向にスカイビングすることと、を含む、プロセスに関する。
小板形状の六方晶窒化ホウ素粒子を含む六方晶窒化ホウ素粒子及びポリマーを提供することと、
六方晶窒化ホウ素粒子とポリマーとを混合して、粉末混合物を得ることと、
粉末混合物を円筒形状に形成することにより、中心軸を有する成形円筒体を得ることであって、小板形状の六方晶窒化ホウ素粒子が、成形円筒体の中心軸に垂直な好適な配向を有する、成形円筒体を得ることと、
成形円筒体を焼結することにより、中心軸を有する焼結体を得ることであって、小板形状の六方晶窒化ホウ素粒子が、焼結体の中心軸に垂直な好適な配向を有する、焼結体を得ることと、
焼結体をその中心軸の周りに回転させ、焼結体からフィルムを径方向にスカイビングすることと、を含むプロセスによって製造することができる。
ポリテトラフルオロエチレン(PTFE)粉末グレードTF1750(Dyneon GmbH,Burgkirchen,Germanyから入手可能)と、六方晶窒化ホウ素粒子(Cooling Filler Platelets CFP015,3M Technical Ceramics,Zweigniederlassung der 3M Deutschland GmbH,Kempten,Germanyから入手可能)との混合物25kgを、10体積%の窒化ホウ素粉末及び90体積%のPTFEを含むように調製した。CFP015粒子は、小板形状の六方晶窒化ホウ素粒子を含む。CFP015粒子の比表面積(BET)は2.4m2/gであり、平均粒子サイズ(d50)は14.5μmであり、アスペクト比は31である。
30体積%の窒化ホウ素粉末及び70体積%のPTFEを使用したことを除いて、実施例1を繰り返した。焼結ブロックの密度は、理論密度の95.9%に相当する2.17g/cm3であった。
50体積%の窒化ホウ素粉末及び50体積%のPTFEを使用したことを除いて、実施例1を繰り返した。焼結ブロックの密度は、理論密度の88.5%に相当する2.00g/cm3であった。
Cooling Filler Platelets CFP0075(3M Technical Ceramics,Zweigniederlassung der 3M Deutschland GmbH,Kempten,Germanyから入手可能)を六方晶窒化ホウ素粒子として用いた以外は、実施例1~3を繰り返した。CFP0075粒子は、小板形状の六方晶窒化ホウ素粒子を含む。CFP0075粒子の比表面積(BET)は5.6m2/gであり、平均粒子サイズ(d50)は7.9μmであり、アスペクト比は17である。
窒化ホウ素粒子をPTFE粉末に転化せず、100体積%のPTFEの試料を実施例1に記載したように加圧成形して焼結した以外は、実施例1を繰り返した。
Claims (8)
- 可撓性電子デバイスのロールツーロール加工に使用可能なフィルムであって、
前記フィルムが、ポリマー及び六方晶窒化ホウ素粒子を含む複合材料を含み、
前記六方晶窒化ホウ素粒子が、小板形状の六方晶窒化ホウ素粒子を含み、
前記小板形状の六方晶窒化ホウ素粒子が、好適な配向を有し、
前記好適な配向が、前記フィルムの平面の方向に対して垂直であり、
前記フィルムのテクスチャーインデックスが、最大で0.8であり、
前記テクスチャーインデックスが、前記フィルムの前記平面に垂直な方向で測定されるものであり、
前記フィルムのテクスチャーインデックスが、X線回折法によって決定されるものであり、
前記六方晶窒化ホウ素粒子の平均粒子サイズ(d 50 )が少なくとも5μmであり、
前記平均粒子サイズ(d 50 )は、レーザー回折によって測定されるものであり、
前記フィルムが、
小板形状の六方晶窒化ホウ素粒子を含む六方晶窒化ホウ素粒子及びポリマーを提供することと、
前記六方晶窒化ホウ素粒子と前記ポリマーとを混合して、粉末混合物を得ることと、
前記粉末混合物を円筒形状に形成することにより、中心軸を有する成形円筒体を得ることであって、前記小板形状の六方晶窒化ホウ素粒子が、前記成形円筒体の前記中心軸に垂直な好適な配向を有する、成形円筒体を得ることと、
前記成形円筒体を焼結することにより、中心軸を有する焼結体を得ることであって、前記小板形状の六方晶窒化ホウ素粒子が、前記焼結体の前記中心軸に垂直な好適な配向を有する、焼結体を得ることと、
前記焼結体をその中心軸を軸として回転させ、前記焼結体からフィルムを径方向にスカイビングすることと、
を含むプロセスによって得られるものである、フィルム。 - 前記ポリマーが、フルオロポリマー、又はポリイミド、又はポリエステル、又は超高分子量ポリエチレン(UHMWPE)である、請求項1に記載のフィルム。
- 前記小板形状の六方晶窒化ホウ素粒子のアスペクト比が少なくとも5であり、前記アスペクト比が、走査電子顕微鏡(SEM)により測定されるものである、請求項1又は2に記載のフィルム。
- 前記複合材料が、前記複合材料の総量に基づいて、10体積%~60体積%の六方晶窒化ホウ素粒子を含む、請求項1又は2に記載のフィルム。
- 前記フィルムの面貫通熱伝導率が、少なくとも0.7W/m*Kであり、
前記フィルムの面内熱伝導率が、少なくとも0.4W/m*Kであり、
前記面貫通熱伝導率及び前記面内熱伝導率が、そこから前記フィルムがスカイビングされる焼結体から切り出された試料について測定されるものであり、
前記面貫通熱伝導率及び前記面内熱伝導率が、レーザーフラッシュ法により測定されるものである、請求項1又は2に記載のフィルム。 - 請求項1に記載のフィルムを製造するプロセスであって、前記プロセスが、
小板形状の六方晶窒化ホウ素粒子を含む六方晶窒化ホウ素粒子及びポリマーを提供することと、
前記六方晶窒化ホウ素粒子と前記ポリマーとを混合して、粉末混合物を得ることと、
前記粉末混合物を円筒形状に形成することにより、中心軸を有する成形円筒体を得ることであって、前記小板形状の六方晶窒化ホウ素粒子が、前記成形円筒体の前記中心軸に垂直な好適な配向を有する、成形円筒体を得ることと、
前記成形円筒体を焼結することにより、中心軸を有する焼結体を得ることであって、前記小板形状の六方晶窒化ホウ素粒子が、前記焼結体の前記中心軸に垂直な好適な配向を有する、焼結体を得ることと、
前記焼結体をその中心軸を軸として回転させ、前記焼結体からフィルムを径方向にスカイビングすることと、を含む、プロセス。 - 前記六方晶窒化ホウ素粒子が、最大で20m2/gの比表面積(BET)を有する、請求項6に記載のプロセス。
- 可撓性電子デバイスを製造するための、請求項1又は2に記載のフィルムの使用。
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PCT/IB2020/054115 WO2020225678A1 (en) | 2019-05-03 | 2020-04-30 | Film usable for roll-to-roll processing of flexible electronic devices comprising a composite material of a polymer and boron nitride |
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