Laminated paper-plastic insulating tape and cable including such

Details Laminated paper-plastic insulating tape and cable including such Laminated paper-plastic insulating tape and cable including such

1987-12-03

1989-08-01

Lesmes, George F.

Electricity: conductors and insulators

With fluids or vacuum

Conduits, cables and conductors

174120FP, 174121B, 428513, 428530, 4285375, H01B 702, B32B 2308

Patent

active

048534900

ABSTRACT:
A composite tape for forming at least part of the insulation of a high voltage electrical cable, particularly an oil-filled cable, and a cable including such insulating tape. The composite tape includes at least one layer of paper tape having a borate or silicate weight content in the range form 0.1 to 3% of the weight of the paper bonded to at least one surface or the surfaces of a film of bi-oriented polymeric plastic material by a copolymer layer which has a thickness of from about 1-10 microns. The thickness of all the plastic material in the composite tape is in the range from 10 to 30% of the total thickness of the tape. Preferred polymeric materials are polypropylene and polymethylpentene. A bonding material can be propylene-ethylene copolymer.

REFERENCES:
patent: 3749812 (1973-07-01), Reynolds et al.
patent: 3775549 (1973-11-01), Matsuda et al.
patent: 3928705 (1975-12-01), Loft et al.
patent: 3959549 (1976-05-01), Penczynski et al.
patent: 4150188 (1979-04-01), Brulet
patent: 4407697 (1983-10-01), Sadler et al.
patent: 4417093 (1983-11-01), Occhini et al.
patent: 4419408 (1983-12-01), Schmukler et al.
patent: 4571357 (1986-02-01), Hata et al.
"Method of Thermally Upgrading Insulating Paper Using Alkyl-Naphthalene Oil"; Miyoshi; IEEE Transactions on Elec. Insul., vol. E1-11, No. 3, Sep. (1976).

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