PURPOSE: To reflect electromagnetic waves efficiently, by laminating the 1st synthetic resin layer where power or flaky conductive substance is scattered and mixed uniformly substantially and the 2nd synthetic resin layer which is not containing the conductive substance substantially.
CONSTITUTION: The 1st synthetic resin layer 3' where the powder or flaky conductive substance is uniformly scattered and mixed substantially and the 2nd synthetic resin layer 4' which is not containing the conductive substance substantially. Electromagnetic waves are reflected on the resin layer 3' and the transmission to its back surface is blocked. A sufficient mechanical strength is realized with the resin layer 4' to compensate the decrease in the mechanical strength of the resin layer 3'.
KOGANEI KEIJI
SHIROGANE HIDEAKI
MITSUBISHI PLASTICS IND