product introduction

The prepainted steel sheet in coil is a product obtained by subjecting a hot-dipped galvanized steel sheet, and galvalume steel sheet, or an aluminum sheet to a surface chemical treatment (coating), followed by baking and curing.The total thickness of the pre-panted galvanized steel coil is composed of the base steel – coating -primer – top paint –protective layer thickness. The top paint thickness is 10-25μm, and the back paint thickness is 5-20μm. The thinner the basesteel thickness, the higher the price of the ppgi steel coil, because the processing cost becomes higher.Usually, the paint coating material is polyester (PE) and the color of the back paint is white grey. The color can becustomized according to the RAL color card or customer samples. Special patterns can be made, such as wood grain, flower print,camouflage, brick.1.PPGI is also known as prepainted galvanized steel coil and color coated steel coil, with a hot dip zinc coated steel sheetsubstrate.2.    PPGL is also known as prepainted galvalume steel coil, with a galvalume steel sheet as a substrate.

PPGI Sheet Coating Layer * Top (Finish) Coating (PE/HDP/PVDF, etc.)* Primer Coating* Pre Treatment (Chromate Coating)* Plating Layer (Zn, AL, 55%AL+Zn)* Base Metal (Cold Rolled Steel Sheet)* Plating Layer (Zn, AL, 55%AL+Zn, Sn, Cr, etc.)* Pre Treatment (Chromate Coating)* Functional Painting (Epoxy, Polyester )Type Of CoatingThe coating types currently used for PPGI/PPGL steel coil include PE, PVDF, SMP, acrylic, PVC, etc.PE The PE-coated color-coated steel sheet is easy to be processed and formed because of its good adhesion, and the price isrelatively cheap. But the other degree of UV resistance and chalking resistance is relatively low. PE color coated steel can beused for the roof of ordinary civil buildings.SMPSMP steel plate has better durability, and the cost is higher than the PE coating. Silicone is not as good as PE in terms ofadhesion and processing formability to materials,High Durable Polyester (HDP)It is better than ordinary SMP coatings, and its outdoor weather resistance reaches 16 years. Its flexibility and weatherresistance are higher.PVCPVC coating has nice anti-chemical and anti-water, and the coasting is relatively thick, which can well protect the substrate. ThePVC coating is rarely used because they pollute the environment.PVDFPVDF coatings have great color retention and corrosion resistance. Among the PPGI sheet coating for construction, it is thehighest grade.AcrylicThe comprehensive performance is good, the price is expensive, and it is only used in specific fields (such as containers). 

Product parameters