JP6893888B2 - 耐コロナ性樹脂相溶性積層体 - Google Patents
耐コロナ性樹脂相溶性積層体 Download PDFInfo
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
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Description
a)90〜99重量パーセントの均一に分散された焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である1〜10重量パーセントのアラミド材料とを含む耐コロナ性層と、
b)一方向または織フィラメントヤーンを含み、第1および第2の面を有する支持体層と、
c)60〜80重量パーセントの均一に分散された無焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である20〜40重量パーセントのアラミド材料とを含む樹脂相溶性層と
を含む、電気絶縁物として使用するために適した積層体構造物であって、
支持体層の第1の面が耐コロナ性層に直接結合され、および支持体層の第2の面が樹脂相溶性層に直接結合され、積層体構造物が60重量パーセント以上の全マイカ含有量を有する、積層体構造物に関する。
以下の試験方法が以下に提供される実施例において使用された。
多層積層体構造物は、耐コロナ性層、一方向ガラス糸支持体層、および樹脂相溶性層である3つの別個の層から製造された。耐コロナ性層は厚さ0.15mmであり、95重量パーセントの焼成マイカフレーク(Electrical Samica Flake Co.,Rutland,Vermontから入手可能な白雲母タイプ)と、米国特許第3,756,908号明細書に一般的に記載された方法で製造された5重量パーセントのポリ(メタフェニレンイソフタルアミド)フィブリドとを含有した。
ガラスフィラメント織布が支持層として一方向ガラスフィラメントに取って代わり、エポキシ系接着剤の層が約10g/m2であること以外、実施例1が繰り返された。ガラス布は厚さ80マイクロメートルであり、全積層体構造物の厚さは0.21mmになった。この積層体のデータは表1および2に示される。
比較例Aは、1つのみの厚い無焼成マイカ層、エポキシ系接着剤(約10g/m2)、およびガラスフィラメント織布である1つの支持体層を備えたのみである以外、実施例2と同様の方法で製造されるマイカテープであった。マイカ紙は、95重量パーセントの無焼成マイカフレーク(SWECO Inc.,South Koreaから入手可能な白雲母タイプ)と、0.12ミリメートルの厚さを有するポリ(メタフェニレンイソフタルアミド)フィブリド5重量パーセントとから製造された。ガラス布は厚さ80マイクロメートルであった。得られた全積層体構造物は、0.161mmの厚さおよび194グラム/平方メートルの坪量を有した。この積層体のデータは表1および2に示される。表2は、比較例Aよりも実施例1および2の耐電圧が著しく増加したことを示す。この改良は、本発明のマイカ−アラミド紙において使用される焼成マイカの結果である。
比較例B〜Cは、二層マイカ−アラミド紙が単層マイカ紙に取って代わったこと以外、実施例Aと同様の方法で製造された。二層マイカ−アラミド紙は、マイカの豊富なプライおよびマイカの少ないプライから製造された。マイカの豊富なプライは、90重量パーセントの焼成マイカフレークおよび10重量パーセントのポリ(メタフェニレンイソフタルアミド)フィブリドからなった。マイカの少ないプライは、45重量パーセントの焼成マイカフレーク、40重量パーセントのポリ(メタフェニレンイソフタルアミド)フィブリド、および15重量パーセントのポリ(メタフェニレンイソフタルアミド)フロックからなった。マイカの豊富な構成成分とマイカの少ない構成成分との水性分散体をFourdrinierタイプの製紙装置の第1および第2のヘッドボックス中にポンプで送った。マイカの豊富なプライが上部にありマイカの少ないプライが下部にある層状ウエットレイドペーパーを形成した。上部プライの坪量は約85g/m2であり、下部プライの坪量は約50g/m2であった。約3000N/cmのニップ圧力および約220℃のロール温度において、カレンダーの高温ニップ内で層状ウエットレイドペーパーを接着剤およびガラス織布と共にカレンダー処理して、積層体を製造した。
積層体中の層が一切の付加的な接着剤なしでカレンダー処理され、マイカ層中のバインダーがそれらの層をガラス支持体層に結合すること以外、実施例1および2が繰り返される。最終積層体の性能および厚さは、実施例1および2について示された性能および厚さと同様である。
実施例1、2および3の多層積層体構造物を幅15mmのテープのロールに切断する。次に、テープを使用して150mm×75mmの断面寸法を有する金属導体にスパイラル状に巻き付ける。テープは、導体が十分に絶縁されるまで半巻きで(50%重なり合わせて)巻き付けられる。巻き付けられた導体は、そのままでモーターにおいて使用されるものもあるが、モーターにおいて使用する前にエポキシ樹脂で含浸されるものもある。テープは、導体に良好な電気絶縁を提供する。
1.a)90〜99重量パーセントの均一に分散された焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である1〜10重量パーセントのアラミド材料とを含む耐コロナ性層と、
b)一方向または織フィラメントヤーンを含み、第1および第2の面を有する支持体層と、
c)60〜80重量パーセントの均一に分散された無焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である20〜40重量パーセントのアラミド材料とを含む樹脂相溶性層と
を含む、電気絶縁物として使用するために適した積層体構造物であって、
前記支持体層の前記第1の面が前記耐コロナ性層に直接結合され、および前記支持体層の前記第2の面が前記樹脂相溶性層に直接結合され、
前記積層体構造物が60重量パーセント以上の全マイカ含有量を有する、積層体構造物。
2. 前記樹脂相溶性層が接着剤の使用によって前記支持体層に結合される、上記1に記載の積層体構造物。
3. 前記耐コロナ性層が接着剤の使用によって前記支持体層に結合される、上記1または2に記載の積層体構造物。
4. 前記耐コロナ性層中の全ての前記アラミド材料がアラミドフィブリドとして存在している、上記1〜3のいずれか一項に記載の積層体構造物。
5. 前記耐コロナ性層および樹脂相溶性層のそれぞれにおける前記アラミド材料が、それぞれの層中のバインダーおよびアラミドフロックの量に基づいて35〜95重量%のバインダーと、5〜65重量%のアラミドフロックとの混合物を含む、上記1〜3のいずれか一項に記載の積層体構造物。
6. 前記耐コロナ性層および樹脂相溶性層のそれぞれにおける前記アラミド材料が、それぞれの層中のバインダーおよびアラミドフロックの量に基づいて35〜75重量%のバインダーと、25〜65重量%のアラミドフロックとの混合物を含む、上記5に記載の積層体構造物。
7. 前記バインダーがアラミドフィブリドである、上記5に記載の積層体構造物。
8. 前記支持体層の前記フィラメントヤーンが、ガラスヤーンまたは熱可塑性もしくは熱硬化性ポリマーから製造されるヤーンを含む、上記1〜7のいずれか一項に記載の積層体構造物。
9. 前記支持体層の前記フィラメントヤーンがガラスヤーンを含む、上記8に記載の積層体構造物。
10. アラミド材料がポリ(メタ−フェニレンイソフタルアミド)を含む、上記1〜9のいずれか一項に記載の積層体構造物。
11. 0.635〜5.1センチメートル(0.25〜2インチ)の幅を有するテープの形態の、上記1〜10のいずれか一項に記載の積層体構造物。
12. 含浸用樹脂、ワニス、またはそれらの混合物をさらに含む、上記1〜11のいずれか一項に記載の積層体構造物。
13. 前記樹脂、ワニス、またはそれらの混合物が部分的にまたは完全に硬化されている、上記12に記載の積層体構造物。
Claims (6)
- a)90〜99重量パーセントの均一に分散された焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である1〜10重量パーセントのアラミド材料とを含む耐コロナ性層と、
b)ガラスヤーンまたは熱可塑性もしくは熱硬化性ポリマーから製造されるヤーンを含む一方向または織フィラメントヤーンを含み、第1および第2の面を有する支持体層と、
c)60〜80重量パーセントの均一に分散された無焼成マイカと、フロック、フィブリド、またはそれらの混合物の形態である20〜40重量パーセントのアラミド材料とを含む樹脂相溶性層と
を含む、電気絶縁物として使用するために適した積層体構造物であって、
前記支持体層の前記第1の面が前記耐コロナ性層に結合され、および前記支持体層の前記第2の面が前記樹脂相溶性層に結合され、
前記積層体構造物が60重量パーセント以上の全マイカ含有量を有する、積層体構造物。 - 前記樹脂相溶性層と前記支持体層との間に接着剤の層が存在する、請求項1に記載の積層体構造物。
- 前記耐コロナ性層と前記支持体層との間に接着剤の層が存在する、請求項1または2に記載の積層体構造物。
- 前記樹脂相溶性層と前記支持体層との間に接着剤の層が存在しない、請求項1に記載の積層体構造物。
- 前記耐コロナ性層と前記支持体層との間に接着剤の層が存在しない、請求項1または2に記載の積層体構造物。
- アラミド材料がポリ(メタ−フェニレンイソフタルアミド)を含む、請求項1〜5のいずれか1項に記載の積層体構造物。
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