Prepainted Galvanized Steel

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional prepainted galvanized steel manufacturers and suppliers in China. Welcome to wholesale customized prepainted galvanized steel at competitive price from our factory. Good service and quality products are available.

PPGI stands for Pre-Painted Galvanized Iron or Pre-Painted Galvanized Steel. PPGI coils are made by coating a layer of paint on top of the galvanized layer of the steel coil. This gives the steel a decorative finish and helps to protect it from rust and corrosion. PPGI coils are commonly used in the construction, automotive, and appliance industries.

Prepainted steel sheet is coated with organic layer, which provides higher anti-corrosion property and a longer lifespan than that of galvanized steel sheets.The base metals for prepainted steel sheet consist of cold rolled, HDG electro-galvanized and Hop-dip zinc-alu-mag base metal. The finish coats of prepainted steel sheets can be classified into groups as follows: polyester, silicon modified polyesters, polyvinylidene fluoride, high-durability polyester, etc.

ppgi coil sheet

PPGI Steel Main Types

The substrate of the color steel plate is a cold rolled substrate, a hot-dip galvanized substrate, and an electrogalvanized substrate. The coating types can be classified into polyester, silicon modified polyester, polyvinylidene fluoride and plastisol. The surface state of color steel plates can be divided into coated plates, embossed plates and printed plates. Color steel plates are widely used in construction appliances and transportation industries. For the construction industry, they are mainly used in steel structure factories, airports, warehouses and refrigeration industries. Roofs and doors of commercial buildings, etc., and civil buildings use less color steel plates.

Coating Type

Polyester (PE): Good adhesion, rich colors, wide range in formability and outdoor durability, medium chemical resistance, and low cost.
Silicon modified polyester(SMP): Good abrasion resistance and heat resistance, as well as good external durability and chalking resistance, gloss retention, general flexibility, and medium cost.
High Durability Polyester(HDP): Excellent color retention and anti-ultraviolet performance, excellent outdoor durability and anti-pulverization, good paint film adhesion, rich color, excellent cost performance.
Polyvinylidene Fluoride(PVDF): Excellent color retention and UV resistance, excellent outdoor durability and chalking resistance, excellent solvent resistance, good moldability, stain resistance, limited color, and high cost.

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