| 摘要 |
A flat rolled magnetic steel sheet or strip having its surface coated for bonding by heating and pressurization, which flat rolled magnetic steel sheet or strip, even at thin coating, permits bonding over the whole surface of steel sheet and reduces bonding strength lowering. In particular, a flat rolled magnetic steel sheet or strip having its surface coated for bonding, comprising a flat rolled magnetic steel sheet or strip and, superimposed on a surface thereof, an insulating film exhibiting bonding capability upon application of heat and pressure, characterized in that the insulating film is composed of a mixture of an epoxy resin of 80 to 150°C glass transition temperature (Tg) or modification product thereof and an epoxy resin hardening agent wherein a particulate polymer of 0.01 to 0.5 mum particle diameter is dispersed. The flat rolled magnetic steel sheet or strip having its surface coated for bonding is further characterized in that the Tg of the particulate polymer is in the range of 10 to 80° C, and still further in that the particulate polymer is an acrylic resin.
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