Sumitomo Electric Industries, Limited

Other

Hidemitsu Kuwabara

Ryosuke Hata

Masayuki Hirose

Shosuke Yamanouchi

Yasuharu Mizumoto

Yasuhiro Hagiuda

Jun Yorita

Hiroshi Takigawa

Hiroyuki Yamamoto

Katsuhiko Katayama

Toru Tsujioka

Disclosed is an electrical insulating laminated paper prepared by a process which comprises the steps of melt-extruding a polyolefin resin as a binder onto one or two sheets of a kraft insulating paper by means of a extruder to obtain a laminated paper, and calendering or supercalendering the laminated paper so that the total thickness thereof is from 30 to 200 &mgr;m and the proportion of a polymer comprising the polyolefin resin is from 40 to 90%. The laminated paper is excellent in dielectric properties, dielectric strength, and mechanical properties such as adhesive strength.

Electrical insulating laminated paper, process for producing the same oil-impregnated power cable containing the same

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.

Method for producing an insulating polyolefin laminated paper

Electric power supply cable using insulating polyolefin laminate paper

Insulating polyolefin laminate paper and method for producing same, and

An electrically insulating laminate paper for an electric apparatus to be wound in a wet state on a conductive material and thereafter impregnated with oil, which is characterized by that water drops having a wide particle size distribution are scattered on the surface of the electrically insulating laminate paper comprising an integrated assembly composed of a plastic film and fiber papers bonded to each other to moisten said fiber papers.

Electrically insulating laminate paper for oil-impregnated electric

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Shizuoka, Japan

Hidemitsu Kuwabara