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What Is PPGI: Definition, Characteristics, and Applications

What Is PPGI Material?

PPGI (Pre-Painted Galvanized Iron) is a multifunctional composite material made by coating the surface of galvanized steel sheets with organic coatings. Its core structure is composed of a galvanized substrate (anti-corrosion) and a precision roller-coated color coating (decoration + protection). It has corrosion resistance, weather resistance, decorative properties and convenient processing. It is widely used in building roofs/walls, home appliance housings, furniture, storage facilities and other fields. It can be customized in color, texture and performance (such as fire resistance and UV resistance). It is a modern engineering material that takes into account both economy and durability.

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Characteristics and Properties of PPGI Steel

1. Double protection structure

(1).Galvanized substrate at the bottom:

Hot-dip galvanizing process forms a 40-600g/m² zinc layer, which protects the steel from electrochemical corrosion through sacrificial anode.

(2).Surface organic coating:

Precision roller coating Polyester (PE)/silicon modified polyester (SMP)/fluorocarbon (PVDF) coating, providing color decoration and enhancing UV resistance, scratch resistance and chemical corrosion resistance.

2.Four core performance advantages

Characteristic Mechanism of action Examples of actual benefits
Super weather resistance The coating reflects 80% of ultraviolet rays and resists acid and alkali corrosion Outdoor service life is 15-25 years (3 times longer than ordinary galvanized sheet)
Ready to use Factory pre-painted, no need for secondary spraying Improve construction efficiency by 40% and reduce overall costs
Lightweight and high strength Thin gauge (0.3-1.2mm) high strength steel The building roof is reduced by 30% and the supporting structure is saved
Customized decoration 100+ color cards available, imitation wood grain/stone grain and other effects Meet the needs of unified architectural aesthetics and brand vision

3.Key process indicators

Coating thickness: 20-25μm on the front, 5-10μm on the back (double coating and double baking process)

Zinc layer adhesion: ≥60g/m² (≥180g/m² required for harsh environments)

Bending performance: T-bend test ≤2T (no cracking of the coating)

4.Sustainable value
Energy saving: High solar reflectance (SRI>80%) reduces building cooling energy consumption

Recycling rate: 100% of steel is recyclable, and coating incineration residue is <5%

Pollution-free: Replaces traditional on-site spraying and reduces VOC emissions by 90%

 

Applications of PPGI

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Applications of PPGI

Construction
Home appliance manufacturing
Transportation
Furniture and daily necessities
Emerging fields
Construction

1.Industrial/commercial buildings

Roofs & walls: large factories, logistics warehouses (PVDF coating is UV-resistant, with a lifespan of 25 years+)

Curtain wall system: office building decorative panels (imitation wood/stone color coating, replacing natural materials)

Partition ceilings: airports, gymnasiums (lightweight to reduce structural load, 0.5mm thick panels are only 3.9kg/m²)

2.Civil facilities

Canopies & fences: residential/community (SMP coating is weather-resistant and maintenance-free)

Combined housing: temporary hospitals, construction site camps (modular and fast installation)

 

Home appliance manufacturing

1.White appliances Refrigerator/washing machine housing PE coating is fingerprint-resistant and scratch-resistant
2.Air conditioner outdoor unit cover, inner tank Zinc layer ≥120g/m² anti-salt spray corrosion
3.Microwave oven cavity panel High temperature resistant coating (200℃)

Transportation

Automobile: passenger car interior panels, truck bodies (30% weight reduction vs aluminum alloy)

Ships: cruise ship bulkheads (fireproof Class A coating)

Facilities: high-speed rail station awnings, highway noise barriers (wind pressure resistance 1.5kPa)

Furniture and daily necessities

Office furniture: filing cabinets, lifting tables (metal texture + environmentally friendly coating)

Kitchen and bathroom supplies: range hoods, bathroom cabinets (easy-to-clean surface)

Retail shelves: supermarket display racks (low cost and high load-bearing capacity)

Emerging fields

Photovoltaic industry: solar bracket (zinc layer 180g/m² to resist outdoor corrosion)

Clean engineering: clean room wall panels (antibacterial coating)

Agricultural technology: smart greenhouse roof (translucent coating to adjust light)

PPGI Coils and Sheets

1.Introduction of PPGI Coil

PPGI Coils are continuous-roll pre-painted steel products formed by applying colored organic coatings (e.g., polyester, PVDF) onto galvanized iron substrates, engineered for high-speed automated processing in manufacturing lines. They deliver dual protection against corrosion (zinc layer 40-600g/m²) and UV degradation (20-25μm coating), while enabling mass production efficiency—cutting material waste by 15% versus sheets—in appliances, building panels, and automotive components through seamless roll-forming, stamping, or slitting operations.

2.Introduction of PPGI Sheet

PPGI Sheets are pre-finished flat steel panels made by coating galvanized iron substrates (zinc layer 40-600g/m²) with colored organic layers (e.g., polyester, PVDF), optimized for direct installation in construction and fabrication. They provide immediate corrosion resistance (1,000+ hour salt spray resistance), UV protection (20-25μm coating), and aesthetic appeal (100+ RAL colors/textures), eliminating onsite painting while reducing project timelines by 30%—ideal for roofing, cladding, and appliance casings where cut-to-size precision and rapid deployment are critical.

3.The difference between PPGI Coil and Sheet

Comparison Dimensions PPGI Coils PPGI Sheets
Physical form Continuous steel coil (inner diameter 508/610mm) Pre-cut flat plate (length ≤ 6m × width ≤ 1.5m)
Thickness range 0.12mm - 1.5mm (ultra-thin is better) 0.3mm - 1.2mm (regular thickness)
Processing method ▶ High-speed continuous processing (rolling/stamping/slitting)
▶ Uncoiling equipment required		 ▶ Direct installation or on-site cutting
▶ No secondary processing required
Production loss rate ＜3% (continuous production reduces scraps) 8%-15% (cutting geometry waste)
Shipping costs ▲ Higher (steel coil rack is required to prevent deformation) ▼ Lower (stackable)
Minimum Order Quantity (MOQ) ▲ High (usually ≥20 tons) ▼ Low (Minimum order quantity is 1 ton)
Core Advantages Economical production of large quantities Project flexibility and immediate availability
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ROYAL GROUP

Address

Kangsheng development industry zone,
Wuqing district, Tianjin city, China.

E-mail

sales01@royalsteelgroup.com
chinaroyalsteel@163.com(Factory Contact)

Phone

Sales Manager: +86 153 2001 6383‬

Hours

Monday-Sunday: 24-hour Service

Post time: Jul-28-2025