Solventless epoxies basic engineering materials for electrical insulation

The development of the dry wound-post impregnation system (VPI) represented a significant advance in insulation technology. This system matches or exceeds competitive insulation systems in all qualities considered essential for an insulation system for rotating machinery. The versatility of epoxy resins made such a development possible and gave the insulating materials supplier formulation latitude not available in other polymers. Today, however, electrical equipment manufacturers are demanding further improvements in epoxy formulations and the search continues for the “ideal” insulation system.