Electrical steel sheet and manufacturing method thereof

A manufacturing method of an electrical steel sheet, comprising:

• coating a treatment solution containing metal phosphate, an organic resin, and a polyhydric alcohol compound at a surface of a steel strip for an electrical steel sheet;
• performing a baking of the treatment solution so as to form an insulating film in which at least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system,
• wherein the treatment solution contains:
• at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate when it is converted into a resin solid content, as the organic resin;
• and
• the polyhydric alcohol compound for one part by mass to 20 parts by mass relative to 100 parts by mass of the metal phosphate.