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IEC 60371-3-4 1st Edition, October 1992
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Specification for Insulating Materials Based on Mica Part 3: Specifications for Individual Materials Sheet 4: Polyester Film-Backed Mica Paper with a B-Stage Epoxy Resin Binder
Includes all amendments and changes through Amendment 1, September 2006
Additional Comments: BILINGUAL
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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.