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China PPGI/PPGL Steel Coils - Prepainted Galvanized & Aluzinc Coils Supplier and Factory
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China PPGI/PPGL Steel Coils - Prepainted Galvanized & Aluzinc Coils Supplier and Factory

Manufactured using high-quality hot dip galvanized (GI) steel or aluzinc/galvalume (AZ/GL) substrates, our color coated materials are processed on a cutting-edge Continuous Paint Coating Line (CCL). This advanced process involves thorough cleaning, pre-treatment, and the application of multiple layers of organic coatings to ensure outstanding performance. At QINGDAO SINCERELY STEEL, one of the leading China suppliers and factory of prepainted steel products, we offer a diverse range of color coated steel solutions that marry the durability and formability of steel with the exceptional corrosion resistance provided by zinc and paint. Our extensive palette of colors, along with customizable shades and gloss levels, caters to your specific needs. Our Color Coated Prepainted Galvanized Steel Coils (PPGI) and Prepainted Aluzinc Steel Coils (PPGL) are available in various forms, including coils, sheets, slit strips, and profiled sheets. With an annual coil coating capacity of 150,000 metric tonnes, we produce coils in thicknesses ranging from 0.1mm to 2.0mm and widths from 650mm to 1350mm, ensuring we meet the demands of our customers effectively.

Color Coated Steel Coil/Sheet(PPGI/PPGL)

Primers

Epoxy – Polyester (Chrome – Chrome Free); for excellent corrosion and inter-coat adhesion. The Back Coat of the PPGI/PPAZ strip is Generally Polyurethane(PU)-Compatible Epoxy coated in order to have adhesion in case the coils are used for insulated sandwich panel manufacturing.

Topcoats

R.M.P (Regular Modified Polyester)

Regular Modified Polyester is most widely-used coil coating with durable Polyester paint and heat dried. It is applied to interior/exterior materials with no heavy drawings. Thanks to its variable colours and glosses with an economic feasibility. RMP coated products are used for exterior panels and interior design purposes that do not require excessive processing. It generally displays superior workability, durability, and weather resistance and used for a variety of purposes; offered in a wide array of colours and degrees of polish.

Matt and wrinkle effect can be added to the top finish.

End Usage:
  • Roofing & siding panels
  • Interior Partition
  • Building Interior/Exterior
  • Sandwich panels
  • Roof, Gutter
  • Steel furniture
  • Shutter, Door, Garage Door, Iron Frame, etc.

S.M.P (Silicon Modified Polyester)

Silicon Modified Polyester is a silicon resin modified Polyester paint coated and heat dried. Due to its higher durability than the Regular Polyester, generally applied for building construction. SMP assures economic benefits under circumstances of sea-side or industrial zones. 10-15 years limited warranty provided.

SMP products are coated and baked with paint containing silicon resin. It is suitable for coastal area due to its excellent weather resistance.

End Usage:
  • Public Construction Material
  • Sandwich Panel
  • Corrugated Roof in Industrial Complexes
  • Airport, etc.

Color Coated Steel Coil/Sheet(PPGI/PPGL) Specifications

Application Household appliances, Decoration, Construction, Automotive
Base Plate Galvanized sheet, Galvalume sheet, Zinc-aluminum-magnesium, Aluminum-zinc-magnesium, Aluminum-magnesium-manganese
Structure of Coating Double-Coating + Double-Baking, Triple-Coating + Triple-Baking + Monochrome Printing, Color Printing + Hot Laminating + Embossing
Internal Dia. 508/610mm
Coil Weight 3-7 Tons
Size Thickness: 0.11-1.5mm | Width: 600-1500mm

Coating Description

Type of Coating Base Coil Coating (um) MEK T Bend 5% Hydrochloric Acid Neutral Salt Spray Common Environment
Polyester(PE) Z/AZ/ZM/AZM ≥20 ≥100 3T 24 h 1000 h 10 years
Silicon Modified Polyester(SMP) Z/AZ/ZM/AZM ≥23 ≥100 3T 24 h 1500 h 15 years
High Weatherability Polyester Z/AZ/ZM/AZM ≥23 ≥100 3T 24 h 1500 h 15 years
Fluorocarbon (PVDF) Z/AZ/ZM/AZM ≥25 ≥100 2T 24 h 1500 h 15 years
High corrosion resistance and weather resistance polyester (HDP Pro) Z/AZ/ZM/AZM ≥25 ≥100 2T 24 h 1500 h 20 years

Production Process

Frequently Asked Questions (FAQ)

What is the difference between RMP and SMP coatings?
RMP (Regular Modified Polyester) is a highly cost-effective and versatile coating widely used for general indoor and outdoor decoration. SMP (Silicon Modified Polyester) incorporates silicon resin to provide significantly higher weatherability, durability, and corrosion resistance, making it ideal for coastal and industrial environments.
Which base plates can be used for PPGI/PPGL coils?
The available base plates include Galvanized sheet, Galvalume sheet, Zinc-aluminum-magnesium, Aluminum-zinc-magnesium, and Aluminum-magnesium-manganese.
What range of sizes is available for these steel coils?
The thickness of the color-coated steel ranges from 0.11mm to 1.5mm, and the width ranges from 600mm to 1500mm, with an internal diameter of either 508mm or 610mm.
How long does the HDP Pro coating last in a common environment?
HDP Pro (High corrosion resistance and weather resistance polyester) coatings offer excellent durability and are rated to last up to 20 years in common environments.
Why is a primer applied to the steel coils?
Primers (such as Epoxy - Polyester, Chrome or Chrome-Free) are applied to provide superior corrosion protection and to ensure strong adhesion between the base metal and the topcoat. The back coat is often polyurethane-compatible epoxy coated to facilitate adhesion in sandwich panel production.