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Prepainted Galvanized/Aluzinc Steel Coils (PPGI/PPGL) from China Suppliers & Factory - Quality Color Coated Steel
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Prepainted Galvanized/Aluzinc Steel Coils (PPGI/PPGL) from China Suppliers & Factory - Quality Color Coated Steel

At QINGDAO SINCERELY STEEL, we are proud to be a leading China supplier and factory of color coated materials, including Prepainted Galvanized Steel Coils (PPGI) and Prepainted Aluzinc Steel Coils (PPGL). Our products are manufactured using hot dip zinc coated (GI) steel or aluzinc/galvalume (AZ/GL) substrates, ensuring exceptional durability and corrosion resistance. The manufacturing process involves a continuous paint coating line (CCL) where the metal surface is meticulously cleaned, pre-treated, and layered with high-quality organic coatings, We offer an extensive selection of colors, making us the supplier with the widest range in the market. Our customization options allow for tailored shades and gloss levels to meet specific customer requirements. With an impressive annual coil coating capacity of 150,000 Metric Tonnes, we provide products in thicknesses ranging from 0.1mm to 2.0mm and widths from 650mm to 1350mm. Our color coated materials can be supplied as coils, sheets, slit strips, or profiled sheets, making us a versatile choice for all your steel needs. Trust QINGDAO SINCERELY STEEL for high-quality products that combine the strength of steel with outstanding aesthetics.

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.
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

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Frequently Asked Questions (FAQ)

What is the difference between RMP and SMP coatings?
RMP (Regular Modified Polyester) is the most widely-used coating, offering excellent workability, economy, and color variety for standard applications. SMP (Silicon Modified Polyester) incorporates silicon resin to provide higher durability and weather resistance, making it highly suitable for coastal areas and industrial complexes.
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 are the standard sizes and coil weights?
The standard thickness ranges from 0.11mm to 1.5mm, and the width ranges from 600mm to 1500mm. The coil weight typically ranges from 3 to 7 Tons with an internal diameter of 508mm or 610mm.
How long is the service life of HDP Pro and PVDF coatings?
Under common environmental conditions, Fluorocarbon (PVDF) coating offers a service life of 15 years, while High Corrosion and Weather Resistance Polyester (HDP Pro) offers an extended service life of up to 20 years.
Why is a primer essential for PPGI/PPGL steel coils?
Primers like Epoxy-Polyester provide excellent corrosion resistance and inter-coat adhesion. Additionally, a Polyurethane (PU)-compatible epoxy back coat is applied to ensure proper adhesion when the coils are used for manufacturing insulated sandwich panels.