Prepainted Steel Sheets: Usage of Different Coating Structures
2022年12月5日
1. Type of coating structure
2/1: Coat the top surface of the steel sheet twice, coat the lower surface once, and bake the sheet twice.
2/1M: Coat and bake twice for both top surface and undersurface.
2/2: Coat the top/lower surface twice and bake twice.
2. Usage of different coating structures
2/1: The anti-corrosion property and scratch resistance of the single-layer backside coating is relatively poor, however, its adhesive property is good. The prepainted steel sheet of this kind is mainly used for sandwich panel;
2/1M: Back coating has good corrosion resistance, scratch resistance and molding performance. Besides it has good adhesion and is applicable for single layer panel and sandwich sheet.
2/2: The anti-corrosion property, scratch resistance and processing property of the backside coating of prepainted steel sheet is better, so it is widely used for roll forming. But its adhesive property is poor, so it is not used for sandwich panel.
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