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Title:
OIL-IMPREGNATED INSULATING PLASTIC LAMINATED PAPER, KRAFT PAPER FOR USE IN LAMINATED PAPER AND POWER CABLE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/1998/029878
Kind Code:
A1
Abstract:
Oil-impregnated insulating plastic laminated paper for use as an oil-impregnated insulating material in, for example, an OF (Oil-Filled) cable, kraft paper for use in the laminated paper, and a power cable using the laminated paper. The impulse dielectric breakdown properties of the oil-impregnated insulating material obtained by the use of the laminated paper which comprises the kraft paper and a plastic film must be improved by increasing the bonding strength of the kraft paper to the plastic film. Multi-layered paper with more than one layer of paper having different air resistances is used as such kraft paper to solve the aforementioned problem; namely, a low air-resistance layer has 5,000 Gurley/sec or lower, whereas a high air-resistance layer has 1,000 Gurley/sec or higher.

Inventors:
TAKAHASHI TOHRU
MIYATA HIROYUKI
IINUMA KOHICHI
YOSHIDA SHOTARO
SHIGETOSHI IKUO
Application Number:
PCT/JP1996/003853
Publication Date:
July 09, 1998
Filing Date:
December 27, 1996
Export Citation:
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Assignee:
FUJIKURA LTD (JP)
International Classes:
H01B3/54; H01B7/02; H01B9/06; (IPC1-7): H01B3/52
Foreign References:
JPS59134503A1984-08-02
JPS57134813A1982-08-20
JPS6136327B21986-08-18
JPS6355170B21988-11-01
Other References:
See also references of EP 0889485A4
Attorney, Agent or Firm:
Shiga, Masatake (23-3 Takadanobaba 3-chom, Shinjuku-ku Tokyo 169, JP)
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