Insulating boards

Details Insulating boards Insulating boards

1978-08-17

1980-12-23

Silverberg, Sam

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428286, 428290, 428901, B32B 1500

Patent

active

042411327

ABSTRACT:
An insulating board has a polymeric reinforcement layer of fibrous material with a predetermined dielectric constant. A polymer is impregnated into said reinforcement layer and has a dielectric constant which is close to that of the dielectric constant of said fibrous material and the insulating board exhibits isotropic properties. A preselected desired dielectric constant or loss tangent can be built into the board by selection of fillers to preselect the dielectric constant or loss tangent without detracting from desired mechanical properties of the board.

REFERENCES:
patent: 2773781 (1956-12-01), Rodman
patent: 3152949 (1964-10-01), Guthrie
patent: 3737339 (1973-06-01), Alsberg
patent: 3783012 (1974-01-01), Morita et al.
patent: 3940534 (1976-02-01), Fick et al.
patent: 4092457 (1978-05-01), Fujita et al.
patent: 4133927 (1979-01-01), Tomada et al.

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