Laminated paper-plastic insulating tape and cable including such tape
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United States of America Patent
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Aug 1, 1989
Issued Date -
N/A
app pub date -
Dec 3, 1987
filing date -
Nov 8, 1985
priority date (Note) -
Expired
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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.
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