Process for producing impregnatory belts of fine mica with built in accelerator

摘要

A resin-based coating powder containing a heat-curing hardener is used for bonding mica foil with an accelerator-containing base material in a process for the production of impregnatable insulating tape for the windings of electrical machines. A process for the production of impregnatable pure mica tape with built-in accelerator, which is wound on the conductors of electrical machine windings, impregnated with solvent-free impregnating resin and then heat-cured. The process involves spreading a resin-based coating powder containing a heat-curing hardener onto one side of the mica foil and then bonding the coated side with a base material by pressure and heating.