Production of electrical laminates

Details Production of electrical laminates Production of electrical laminates

B - Operations, Transporting

32

B

154/89, 154/91.1

B32B 15/08 (2006.01) B32B 15/14 (2006.01)

Patent

CA 1158970

Invention: PRODUCTION OF ELECTRICAL LAMINATES ABSTRACT OF THE DISCLOSURE A process for producing electrical laminates comprising the steps of impregnating a fibrous substrate with an unsaturated polyester resin which is a liquid at room temperature, laminating a plurality of the resin- impregnated substrates to form a unitary member, sand- wiching the laminate between a pair of convering sheets, and curing the same, the improvement comprising at least one of said pair of covering sheets having a rigidity as defined by the value E?d3kg?cm, wherein E is the flexural modulus in kg/cm2 and d is the thickness in cm, of greater than 3 x 10-3 kg?cm. This results in smooth surface characteristic of the finished laminate after stripping said one of covering sheets.

367819

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