無方向性電磁鋼板の絶縁皮膜特性に及ぼすポリアクリロニトリル及びアクリルの添加効果

概要

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In order to improve the characteristics of an insulating coating, addition of PAN and AE as resin components was investigated. The results were as follows. In the insulating coating with PAN and AE film defects such as fine crater were not found. On the contrary the coating without PAN easily formed film defects. It is supposed that PAN remains as particles even at drying temperature because of its high melting point and as a result, water which causes film defects vaporizes and escapes easily from the interior of the coating. A proper composition of PAN was found to be 25-75wt% of resin in the coating. Addition of PAN in this composition range, improves the corrosion resistance, TIG weldability, the interlaminar resistance, etc. of the coating. Poor punchability was perceived by single application of PAN, however excellent punchability was obtained by PAN/AE mixture.
1989-08-01