Electrical insulating paper and method of making same

Details Electrical insulating paper and method of making same Electrical insulating paper and method of making same

1977-05-04

1978-06-20

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428516, 428903, 162138, 162146, B32B 502

Patent

active

040963136

ABSTRACT:
The herein-disclosed electrical insulating paper is well-suited to the insulation of extra-and ultra-high-voltage oil-filled electric power cable, and comprises at least one layer (A) which is a mixture of polypropylene fibers and kraft pulp and at least one layer (B) of accumulated polypropylene fibers laminated to the layer (A) by fiber-to-fiber bonding of the polypropylene fibers. The electrical insulating paper is prepared by superposing at least one layer of a mixed paper of polypropylene fibers and kraft pulp and at least one layer of polypropylene web, and heating the superposed layers at a temperature of 110.degree. to 180.degree. C to thermally laminate the layers each other.

REFERENCES:
patent: 3194872 (1965-07-01), Garner
patent: 3532800 (1970-10-01), Wyly et al.
patent: 3749813 (1973-07-01), Shealy
patent: 3957573 (1976-05-01), Miyamoto et al.
patent: 4041203 (1977-08-01), Brock et al.

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