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US 4,729,915 AGranted
Electrical insulating material
AssigneeDiafoil Company, Limited
InventorsSeiji Sakamoto, Yoshinori Sato
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an electrical insulating material which comprises biaxially oriented polyethylene naphthalate film having a center line average roughness of 0.008 to 0.08 .mu.m as measured on the surface thereof and a resistivity of 5.times.10.sup.7 to 5.times.10.sup.10 .OMEGA..multidot.cm as measured in the molten state.
Claims12
An electrical insulating material, which comprises:
- a biaxially oriented polyethylene naphthalate film having a center line average roughness of 0.008 to 0.08 .mu.m as measured on the surface thereof and a volume resistivity of 5.times.10.sup.7 to 5.times.10.sup.10 .OMEGA..multidot.cm as measured in the molten state.
Dependencies are inferred from the claim text.