coating structure

coating structure type
2/1: The upper surface is coated twice, the lower surface is coated once, and baked twice.
2/1M: Coat the upper and lower surfaces twice and bake once.
2/2: Coat the upper and lower surfaces twice and bake twice
Use of different coating structures:
2/1: The corrosion resistance and scratch resistance of the single-layer back paint are poor, but it has good adhesion and is mainly used in sandwich panels;
2/1M: The back paint has good corrosion resistance, scratch resistance and processability, and has good adhesion, suitable for single-laminated panels and sandwich panels.
2/2: The corrosion resistance, scratch resistance and processing formability of the double-layer back paint are good, and most of them are used for single-layer laminates, but their adhesion is poor, so they are not suitable for sandwich panels.