Specification for insulating materials based on mica - Part 3: Specification for individual materials - Sheet 4: Polyester film-backed mica paper with a B-stage epoxy resin binder
This International Standard gives requirements for electrical insulating materials made by combining mica paper with a single polyester film and impregnating the mica paper with an epoxy resin. The material is supplied in a flexible state with the resin in the B-stage for final cure after application. It may be supplied in the form of sheets or rolls. The specification covers material having nominal thickness from 0,16 mm to 0,23 mm.