Insulating barrier tubes and method of making same

Claim 1

A PROCES FOR THE PREPARATION OF TUBULAR ELECTRICAL MEMBERS HAVING INSULTING PROPERTIES WHICH COMPRISES WRAPPING A LENGTH OF POLYSESTER RESIN-IMPREGNATED PLIABLE MATERIAL HAVING HIGH MECHANICAL STRENGHT ABOUT A MANDREL TO FORM ELECTRICAL MEMBERS OF A DESIRED SHAPE, APAPLYING A MIXTURE OF AT LEAST ONE LIQUID, UNSATURATED REACTIVE MONOMER HAVING THE GROUP $C=C< AND AT LEAST ONE ADDDITION-TYPE POLYMERIZATION CATALYST TO SAID PLIABLE MATERIAL WHILE IT IS BEING WRAPPED ABOUT THE MANDREL, AND HEATING THE WRAPPED MEMBER TO CONVERT THE RESIN TO A UNIFORM, HARD, THERMOSET STATE WHICH IS FREE FROM VOIDS. 6.AN ELECTRICAL MEMBER HAVAING INSULATING PROPERTIES COMPRISING A TUBE FORMED BY APPLYING TO A LENGTH OF PLIABLE MATERIAL HAVING HIGH MECHANICAL STRENGTH A SOLUTION OF A POLYESTER RESIN DISSOLVED IN A SOLVENT, HEATING SAID PLIABLE MATERIAL WITH THE RESIN SOLUSTION APPLIED THERETO TO REMOVE THE SOLVENT THEREFROM, WRAPPING SAID PLIABLE MATERIAL ABOUT A MANDREL TO FORM A TUBE MEMBER OF A DESIRED SHAPE, APPLYING A AMIXTURE OF AT LEAST ONE LIQUID, UNSATURATED REACTIVE MONOMER HAVING THE GROUP >C=C< AND AT LEAST ONE ADDITION-TYPE POLYMERIZATION CATALYST TO SAID PLIABLE MATERIAL WHILE IT IS BEING WRAPPED ABOUT THE MANDREL, AND HEATING THE WRAPPED MEMBER TO CONVERT THE RESIN TO A UNIFORM, HARD, THERMOSET STATE WHICH IS FREE FROM VOIDS.