Galvanized steel strip as substrate, after surface pretreatment, roll coating method coated with a layer or multi-layer liquid coating, after baking and cooling plate is coated steel. There are back paint and topcoat coating, in general, is a coat of paint, paint two layers, foreign business, paint, back paint are two layers. Since the coating can be of various colors, the coated steel is customarily referred to as a color coated steel plate.
Common coating unit process flow, the main production process is:
The uncoiler, sewing machine roller tension machine - > > > > an uncoiling loop alkaline degreasing cleaning - drying - > - > - > - > > initial coating drying passivation initial coating drying finish finish finish drying - > > > > air cooling rolling looper - rolling machine - > volume packing.
Types of color coated coil coating:
Polyester has good adhesion, rich color, wide range of molding and outdoor durability, chemical resistance, low cost.
Silicone modified polyester film has good hardness, wear resistance and heat resistance, as well as good external durability and resistance to powdering, gloss retention, flexibility, and moderate cost.
High durability polyester, excellent color retention and anti ultraviolet performance, excellent outdoor durability and anti powdering, good adhesion of paint film, rich color, excellent performance price ratio.
PVDF has excellent color retention and UV resistance, excellent outdoor durability and powdering resistance, excellent solvent resistance, good formability, dirt resistance, limited color, and high cost.
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