Electricity: conductors and insulators – With fluids or vacuum – With fluid stops
Patent
1986-11-07
1988-08-09
Kendell, Lorraine T.
Electricity: conductors and insulators
With fluids or vacuum
With fluid stops
174 24, 174120FP, 428375, 428377, 428383, H02G 1520
Patent
active
047629657
ABSTRACT:
An insulating polyolefin laminate paper and a method for producing such a paper in which first and second fiber paper layers are laminated to a polyolefin film layer. The fiber paper layers have an impermeability of 20 to 4000 Gurley-seconds. At least one of the fiber paper layers is mechanically deformed in such a manner that irregularities are produced having a depth of 2 to 50% of the thickness of the fiber paper layer. The mechanical deformation is accomplished prior to lamination. Before lamination, the water content of the fiber paper layers is controlled to be no more than 4%. Preferably, the thickness of the fiber paper layers is at least 30 microns. Furthermore, an electric power supply cable includes an insulating polyolefin laminate paper as an insulating layer.
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Hagiuda Yasuhiro
Hata Ryosuke
Hirose Masayuki
Kuwabara Hidemitsu
Mizumoto Yasuharu
Kendell Lorraine T.
Sumitomo Electric Industries Ltd.
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