| 摘要 |
The insulating film of an nonoriented electric steel plate is prepared by (a) mixing reactive oligomer and reactive monomer with the weight ratio of 7 to 4, (b) preparing insulating coating solution by adding 5-30 gm silica powder, 1-12 gm photopolymerization initiator and less than 0.5 gm organic pigment to the mixed solution of 100 gm, (c) UV irradiating to the coated steel plate, after coating uniformly the surface of the electric steel plate with the insulating solution.
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