Electrical insulating material

Details Electrical insulating material Electrical insulating material

1979-07-23

1981-03-31

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156 628, 1563071, 1563082, 162125, 162129, 162138, 162145, 162146, 162181C, 162181R, 428284, 428287, 428297, 428298, 428302, 428324, 428402, B32B 516

Patent

active

042593980

ABSTRACT:
An electrical insulating material composed of a mica flake layer and a heat resistant base material layer is prepared by superposing the mica flake sheet containing at most 9% by weight of pulp-like particles of a heat resistant polymer based thereon on the heat resistant base material sheet, both of which sheets being dried, and heating them under pressure. The electrical insulating material has excellent in structural strength, varnish-impregnability, and is resist to pealing off of the mica flakes.

REFERENCES:
patent: 2948329 (1960-08-01), Gaines
patent: 3168434 (1965-02-01), Heyman
patent: 3215590 (1965-11-01), Purvis
patent: 3523061 (1970-08-01), Purvis
patent: 4060451 (1977-11-01), Ucheyama et al.

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