电动机和变压器用于叠层铁芯使用的电工钢板经常都要涂以绝缘涂层，作为不用焊接或铆接而将铁芯加以连接的方法，有利用具有粘结性能的表面绝缘涂层的方法。粘结性表面涂层还有可能提高铁芯刚性、减低噪音和振动，但要求在电机使用过程中能经得住铁芯温升并保持其在高温下的粘 Electric motors and transformers Electrical steel sheets for laminated iron cores are often coated with an insulating coating. As a method of connecting the iron core without welding or riveting, there is a method of using a surface-insulating coating having adhesive properties. Cohesive surface coatings may also increase core rigidity, reduce noise and vibration, but require that the core be able to withstand the temperature rise and maintain its high temperature adhesion during use