TENSION COATING AGENT FOR FORMING INSULATING FILM WITH EXCELLENT GLOSSY PROPERTY, ELECTRICAL RESISTANCE AND METHOD FOR FORMING INSULATION FILM USING THAT, AND ORIENTED ECECTRICAL STEEL SHEET WITH COATED INSULATING FILM THAT METHOD

摘要

PURPOSE: A tension coating agent composition with an excellent glossy property and electrical resistance, a method for forming an insulation film using the same, and a grain-oriented electrical steel plate using the method are provided to improve a thin film glossy property and electrical resistance by accelerating a drying rate and maximizing a surface packing effect. CONSTITUTION: A tension coating agent composition comprises a metal phosphate and colloidal silica as principal components while processing the insulating thin film of a grain-oriented electrical steel plate. The metal phosphate is the mixture of a first magnesium phosphate(Mg(H2PO4)2) and a first aluminium phosphate(Al(H2PO4)3). The tension coating agent for the grain-oriented electrical steel plate contains 30-60g of a colloidal silica solid content with 5-15nm of a particle size based on 100g of a metal phosphate solution.