Heat resistant sheet

Details Heat resistant sheet Heat resistant sheet

1976-01-14

1977-06-14

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428288, 428296, 428474, 428910, B32B 700

Patent

active

040298353

ABSTRACT:
A novel heat resistant sheet having excellent varnish impregnability, a high dielectric strength and a high physical strength is obtained by pressing and heating a mixed web of wholly-aromatic polyamide fibers [A] having tan .delta. (max) .gtoreq. 0.25 and Es < 130 g/d and wholly-aromatic polyamide fibers [B] having tan .delta. (max) .ltoreq. 0.2 and Es .gtoreq. 130 g/d under such conditions as said fibers [A] being heat fused.

REFERENCES:
patent: 3414645 (1968-12-01), Morgan
patent: 3574811 (1971-04-01), Jamison
patent: 3595951 (1971-07-01), Lugullo
patent: 3642706 (1972-02-01), Morgan
patent: 3671542 (1972-06-01), Kwolek
patent: 3767756 (1973-10-01), Blades
patent: 3801545 (1974-04-01), Hunzel
patent: 3869429 (1975-03-01), Blades

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