ELECTRICAL INSULATING MATERIAL COMPRISING AN INSULATING LAYER IN THE FORM OF AN ORGANIC POLYMER

申请公布号：: CA1329519(C)
申请号：: CA19880562221
申请日期：: 1988.03.23
申请公布日期：: 1994.05.17
申请人：: ASEA BROWN BOVERI AB
发明人：: HJORTSBERG, ARNE;HOLMSTROEM, GOERAN;JOHANSSON, LENNART;KARLSSON, THOMMY
分类号：: H01B7/02;C08K3/22;H01B3/30;H01B7/17;H01B17/60;H02K3/40;(IPC1-7):H01B7/28
主分类号：: H01B7/02
摘要：: <p>16 A tape-formed or sheet-formed insulating material comprising an insulating section in t he form of a homogeneous film of an organic polymer or in the form of a felt of a paper of fibres of an organic polymer. The insulating layer is coated at least on one side with a protective layer which protects the insulating layer against degradation caused by corona and which comprises an organic polymer containing at least 10 per cent by volume of a powdered filler in the form of chromium oxide, iron oxide or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 104-108 ohm m. The thickness of the protective layer and the total thickness of the protective layer, respectively, are preferably smaller than the thickness of the insulating layer and the resistivity of the protective layer is preferably in excess of 1010 ohm m, The tape-formed and sheet-formed insulating material may, among other things, be used in windings and coils for electrical machines.</p>