Electrical laminate

In laminate means for electrically isolating and supporting an electrically conductive metallic layer;

• the laminate consisting of at least one electrically conductive layer disposed upon a substrate surface, the substrate portion comprising, in combination:
• a. a woven glass cloth base pad having a high modulus of elasticity in the range of approximately 10 .times. 10.sup.6 and a tensile strength ranging from between about 200,000 psi to 400,000 psi, and being interposed between a pair of outer substrate layers of polyester mat, said woven fiber being bonded directly to said polyester mat;
• b. said polyester mat comprising a mat of spunbonded continuous filamentary polyester fibers with the fibers having a bulk fiber content of between about 84% to 92% of first polyester fibers consisting essentially of oriented polyethylene terephthalate and having a certain first melting point, the balance being binder polyester fibers consisting essentially of non-oriented polyethylene terephthalate and with a certain second and significantly lower melting point than said first polyester fibers, and with said mat having a weight of between about 20 and 30 grams per square yard.