ELECTROMAGNETIC STEEL SHEET HAVING INSULATING COATING

摘要

Provided is an electromagnetic steel sheet having an insulating coating, which has excellent punchability, excellent coating adhesiveness, and excellent coating characteristics after annealing, even without including a chrome compound in the insulating coating. This electromagnetic steel sheet having an insulating coating is characterized by having an insulated coating having a surface treatment agent coated and dried on at least one surface of the electromagnetic steel sheet, said surface treatment agent including: at a mass ratio (A/B) of less than 0.05-1.0, a trialkoxysilane and/or a dialkoxysilane (A) comprising only at least one type of non-reactive substituent group selected from hydrogen, an alkyl group, and a phenyl group; and a silane coupling agent (B).