This Standard specifies requirements for rigid mica materials based on mica splittings or mica paper for application of electric heating equipment. These products may be made from muscovite or phlogopite mica with a suitable bonding medium. The binder may be totally driven off in service, giving a material which needs to be supported, or may remain totally or partially, giving a self-supporting material; in this case, the binder shall have the necessary resistance to the operating temperature. The products may be supplied in sheets, stripes or flat pieces. The minimum nominal thickness is 0.30mm (mica splittings) and 0.2mm (mica paper)

JIS C 2254:2011

IEC 60371-3-3 Ed. 1.0 - Identical