Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Effect of Polyacrylonitrile (PAN) and Acrylic Emulsion (AE)-addition on the Properties of Insulating Coating for Non-oriented Electrical Steel Sheets
Yasuharu MAEDAKouji WAKABAYASHIKen-ichi MASUHARAKiichiro KATAYAMA
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1989 Volume 75 Issue 8 Pages 1324-1331

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Abstract

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.

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© The Iron and Steel Institute of Japan
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