B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/126, 117/200
B32B 15/14 (2006.01) D06M 15/28 (1980.01)
Patent
CA 1120347
ABSTRACT OF THE DISCLOSURE 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.
338395
Davis Robert
Howland Charles P.
Pratt Ralph C.
Castall Incorporated
Swabey Ogilvy Renault
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