JP6802812B2 - 電気導体上にマイカ紙を巻きつける方法および同方法に適したマイカ紙テープ - Google Patents
電気導体上にマイカ紙を巻きつける方法および同方法に適したマイカ紙テープ Download PDFInfo
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- JP6802812B2 JP6802812B2 JP2017564604A JP2017564604A JP6802812B2 JP 6802812 B2 JP6802812 B2 JP 6802812B2 JP 2017564604 A JP2017564604 A JP 2017564604A JP 2017564604 A JP2017564604 A JP 2017564604A JP 6802812 B2 JP6802812 B2 JP 6802812B2
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- conductor
- mica paper
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- tape
- mica
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Description
i)マイカ紙の連続した表面を含む面とマイカ紙に取り外し可能に付着されている支持体層を含む面とを有するテープと、
ii)長さとその長さに垂直な円周とを有する表面を有する電気導体とを有してなり、
方法が、
a. マイカ紙の連続した表面を含むテープの面を導体の表面上の付着点において導体に付着させる工程と、
b. 導体の表面上の付着点から導体円周の少なくとも25パーセントである巻回点までテープが巻回されるまで、マイカ紙が導体表面と接触して、テープを導体の周りに巻回する工程と、次に、
c. マイカ紙が導体の表面と接触したままで、付着点から出発して、テープからの支持体層の連続的な取り外しを開始する工程と、
d. 導体表面の所望の量がマイカ紙の少なくとも1つの層で完全に覆われるまで支持体層を取り外し点において同時に取り外しながら、マイカ紙が導体表面と少なくとも部分的に接触し且つ巻回点において表面と連続的に接触して、テープを導体の周りに巻回し続ける工程であって、
但し、導体表面の所望の量が完全に覆われるまで取り外し点が導体円周の少なくとも25パーセント巻回点の後ろに維持される工程をこの順番で含む。
i)マイカ紙の連続した表面を含む面とマイカ紙に取り外し可能に付着されている支持体層を含む面とを有するテープと、
ii)長さとその長さに垂直な円周とを有する表面を有する電気導体とを有してなり、
方法が、
a. マイカ紙の連続した表面を含むテープの面を導体の表面上の付着点において導体に付着させる工程と、
b. 導体の表面上の付着点から導体円周の少なくとも25パーセントである巻回点までテープが巻回されるまで、マイカ紙が導体表面と接触して、テープを導体の周りに巻回する工程と、次に、
c. マイカ紙が導体の表面と接触したままで、付着点から出発して、テープからの支持体層の連続的な取り外しを開始する工程と、
d. 導体表面の所望の量がマイカ紙の少なくとも1つの層で完全に覆われるまで支持体層を取り外し点において同時に取り外しながら、マイカ紙が導体表面と少なくとも部分的に接触し且つ巻回点において表面と連続的に接触して、テープを導体の周りに巻回し続ける工程であって、
但し、導体表面の所望の量が完全に覆われるまで取り外し点が導体円周の少なくとも25パーセント巻回点の後ろに維持される工程をこの順番で含む。
基本質量をASTM D 645およびASTM D 645−M−96に従って測定し、g/m2単位で記録する。
可剥性支持体層を有するマイカ紙のテープは、1つのマイカ紙層に1つの機械的支持層を積層することによって作製された。マイカ紙層は、SWECO inc.(Korea)製の95質量%のマイカ(SRF−105T)および5質量%のメタ−アラミドフィブリドから製造された。機械的支持(可剥性)層は、厚さ0.0254mmを有するポリエステルフィルム(Mylar(登録商標)DuPont)であった。ポリエステルフィルム上に即製の再位置調整可能な粘着表面を作るために、Scotch(登録商標)SprayMountTM接着剤をポリエステルフィルムの一方の面上に適用した。接着剤の薄い均一なコートをフィルムの表面から6〜8インチの距離から5〜10秒間吹付けて、1分間乾燥させた。ポリエステルフィルム上のこの接着剤層の厚さは約0.020mmである。マイカ紙層をポリエステルフィルムのこの吹付けられた接着剤表面上に置き、5.5MPaのカレンダーニップ圧力下で層を結合して積層体構造物を形成した。次いで積層体構造物を幅15mmのテープに切断した。
商用銘柄仮焼マイカ紙(SRF−105T)は、SWECO Inc.(Korea)から用意された。このマイカ紙は、商用ガラスバックシートおよびポリエステルフィルム支持マイカ紙の前駆体として95%の仮焼マイカおよび5%のメタ−アラミドフィブリドから構成された。このマイカ紙を幅15mmのテープに切断した。得られたこのテープの性質を表に記載する。低い機械的強度のために、テープは、どんな巻出/再巻回張力が設定されても破断し続けた。
導体に実施例1のテープを以下の方法でスパイラル状に巻きつけた。試験される矩形導体の横断面サイズは150mm×75mmであった。このテープの巻回の出発点において、マイカ紙表面をアルミニウム導体表面上にポリイミドフィルムテープ(Nitto Denko P−224 AMB)で固定した。矩形アルミニウム導体の円周の50%が覆われるまでテープが導体の2つの側面上に巻きつけられ、次にマイカ紙からの支持体層の剥離が開始された。導体のスパイラル状の巻きつけが進み、導体の周りに巻回される次の渦巻きが先の巻きつけの50%を覆う(50%の重なりまたは半分の巻きつけ)。幅10mm当たり40Nまで必要に応じてテープに張力を加えて、可視的なしわおよび折り目を取り除いた。マイカ紙の層は導体上に良好に巻きつけられた。支持体層が取り外されている間のマイカ紙と支持体層との間の角度は約90度であった。得られたテープの性質を表に記載する。
可剥性支持体層上のマイカ紙のテープを実施例1におけるように作製し、実施例2におけるように矩形導体上に再び巻回したが、しかしながら導体は、13.3mm×3.3mmの横断面寸法を有するより小さな矩形銅導体であった。幅10mm当たり50Nまで必要に応じてわずかにより高い張力を加えて、可視的なしわおよび折り目を取り除いた。マイカ紙の層は導体上に良好に巻きつけられた。支持体層が取り外されている間のマイカ紙と支持体層との間の角度は約90度であった。得られたテープの性質を表に記載する。
可剥性支持体層上のマイカ紙のテープを実施例1におけるように作製し、実施例2におけるように導体上に再び巻回したが、導体は、160mmの直径を有する丸い横断面のアルミニウムワイヤーであった。この場合、テープは、マイカ紙からの支持体層の剥離が開始される前に丸い横断面の導体の円周の25%までテープが導体上に巻きつけられるだけでよいことが見出された。
本発明のまた別の態様は、以下のとおりであってもよい。
〔1〕マイカ紙を電気導体の周りに適用する方法であって、プロセスが、
i)マイカ紙の連続した表面を含む面と前記マイカ紙に取り外し可能に付着されている支持体層を含む面とを有するテープと、
ii)長さとその長さに垂直な円周とを有する表面を有する電気導体とを有してなり、
方法が、
a. マイカ紙の前記連続した表面を含む前記テープの前記面を前記導体の前記表面上の付着点において前記導体に付着させる工程と、
b. 前記導体の前記表面上の前記付着点から前記導体円周の少なくとも25パーセントである巻回点まで前記テープが巻回されるまで、前記マイカ紙が前記導体表面と接触して、前記テープを前記導体の周りに巻回する工程と、次に、
c. 前記マイカ紙が前記導体の前記表面と接触したままで、前記付着点から出発して、前記テープからの前記支持体層の連続的な取り外しを開始する工程と、
d. 導体表面の所望の量が前記マイカ紙の少なくとも1つの層で完全に覆われるまで前記支持体層を取り外し点において同時に取り外しながら、前記マイカ紙が前記導体表面と少なくとも部分的に接触し且つ巻回点において前記表面と連続的に接触して、前記テープを前記導体の周りに巻回し続ける工程であって、
但し、導体表面の前記所望の量が完全に覆われるまで前記取り外し点が前記導体円周の少なくとも25パーセント前記巻回点の後ろに維持される工程をこの順番で含む方法。
〔2〕工程b.)において前記巻回点が前記導体の前記表面上の前記付着点から前記導体円周の少なくとも50パーセントになるまで前記テープが巻回され、
工程d.)において前記テープが前記導体の周りに巻回され、但し、導体表面の前記所望の量が完全に覆われるまで前記取り外し点が前記導体円周の少なくとも50パーセント前記巻回点の後ろに維持される、前記〔1〕に記載の方法。
〔3〕前記テープが前記導体の周りに螺旋状にまたはスパイラル状に巻回される、前記〔1〕または〔2〕に記載の方法。
〔4〕マイカ紙の1つの層が先に巻きつけられたマイカ紙層に少なくとも部分的に重なるように前記テープの少なくとも一部が巻回される、前記〔3〕に記載の方法。
〔5〕前記マイカ紙が少なくとも70質量%のマイカを含有する、前記〔3〕に記載の方法。
〔6〕マイカ紙の連続した表面を含む第1の面と支持体層を含む第2の面とを有するテープであって、
前記マイカ紙が70〜99質量パーセントのマイカと1〜30質量パーセントのバインダーとを含み、
前記支持体層がフィルム、紙、不織布、または織布を含み、
前記支持体層の初期伸びが前記マイカ紙の初期伸び以下であり、且つ
10N/10mm以下の離層力が前記支持体層にかけられる時にそれが前記マイカ紙から分離され得るように前記支持体層が前記マイカ紙に取り外し可能に付着される、テープ。
〔7〕前記マイカ紙がアラミド、セルロース、酢酸塩、アクリル、ポリオレフィン、ポリアミド、ポリエステル、またはそれらの混合物をさらに含有する、前記〔6〕に記載のテープ。
〔8〕前記マイカ紙がガラス繊維、ロックウール、多結晶繊維状アルミナ、単結晶繊維状チタン酸カリウム、またはそれらの混合物をさらに含有する、前記〔6〕に記載のテープ。
〔9〕前記マイカ紙中の前記バインダーがアラミドフィブリドを含有する、前記〔6〕に記載のテープ。
〔10〕前記マイカ紙がアラミドフロックをさらに含有する、前記〔9〕に記載のテープ。
〔11〕前記アラミドフィブリドおよびフロックがポリ(メタフェニレンイソフタルアミド)から製造される、前記〔10〕に記載のテープ。
Claims (4)
- マイカ紙を電気導体の周りに適用する方法であって、プロセスが、
i)マイカ紙の連続した表面を含む面と前記マイカ紙に取り外し可能に付着されている支持体層を含む面とを有するテープと、
ii)長さとその長さに垂直な円周とを有する表面を有する電気導体とを有してなり、
方法が、
a. マイカ紙の前記連続した表面を含む前記テープの前記面を前記導体の前記表面上の付着点において前記導体に付着させる工程と、
b. 前記導体の前記表面上の前記付着点から前記導体円周の少なくとも25パーセントである巻回点まで前記テープが巻回されるまで、前記マイカ紙が前記導体表面と接触して、前記テープを前記導体の周りに巻回する工程と、次に、
c. 前記マイカ紙が前記導体の前記表面と接触したままで、前記付着点から出発して、前記テープからの前記支持体層の連続的な取り外しを開始する工程と、
d. 導体表面の所望の量が前記マイカ紙の少なくとも1つの層で完全に覆われるまで前記支持体層を取り外し点において同時に取り外しながら、前記マイカ紙が前記導体表面と少なくとも部分的に接触し且つ巻回点において前記表面と連続的に接触して、前記テープを前記導体の周りに巻回し続ける工程であって、
但し、導体表面の前記所望の量が完全に覆われるまで前記取り外し点が前記導体円周の少なくとも25パーセント前記巻回点の後ろに維持される工程をこの順番で含む方法。 - 前記マイカ紙が70〜99質量パーセントのマイカと1〜30質量パーセントのバインダーとを含み、
前記支持体層がフィルム、紙、不織布、または織布を含み、
前記支持体層の初期伸びが前記マイカ紙の初期伸び以下であり、且つ
10N/10mm以下の離層力が前記支持体層にかけられる時にそれが前記マイカ紙から分離され得るように前記支持体層が前記マイカ紙に取り外し可能に付着される、請求項1に記載の方法。 - 前記マイカ紙がアラミド、セルロース、酢酸塩、アクリル、ポリオレフィン、ポリアミド、ポリエステル、またはそれらの混合物をさらに含有する、請求項2に記載の方法。
- 前記マイカ紙がガラス繊維、ロックウール、多結晶繊維状アルミナ、単結晶繊維状チタン酸カリウム、またはそれらの混合物をさらに含有する、請求項2に記載の方法。
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