Bonded Metallic Powder Coating

1. Core Preparation Principle & Process

1. Add the base powder (resin, curing agent, additives, etc.) into a temperature-controlled high-speed mixer;
2. Utilize high-speed mechanical rotation to generate friction heat, raising the temperature of the base powder to a level slightly lower than the glass transition temperature (Tg) of the resin, making the powder surface moderately viscous;
3. Quickly add metallic pigments under nitrogen protection and continuous high-speed stirring, allowing the pigments to uniformly adhere to or embed into the softened base powder particles;
4. Immediately discharge and cool the mixture to complete the bonding process, forming a stable bonded metallic powder product.

2. Key Performance Advantages

• Superior Decorative Effect: The uniform distribution of metallic pigments achieves a bright, luxurious, and consistent metallic luster. Some products can even achieve decorative effects comparable to or exceeding liquid metallic coatings. It supports personalized customization of surface effects, including different metallic textures, gloss levels (1°~95°), and color matching (compatible with RAL, Pantone standards or customer-specific color samples).
• Excellent Application Stability: The bonded structure prevents metallic pigment separation and floating during spraying, ensuring uniform color and luster on the coated surface. The powder has good fluidity and conveying performance, with a high powder deposition rate, and the recycled powder maintains consistent performance, effectively reducing material waste and comprehensive costs.
• Reliable Protective Performance: It exhibits excellent physical and chemical properties, including strong adhesion (Grade 0 according to ISO 2409), high impact resistance (≥50KG/cm), good flexibility (bending test ≤2mm), and cup resistance (≥6mm). It also has outstanding corrosion resistance, with neutral salt spray resistance ≥500 hours and damp heat resistance ≥1000 hours, effectively protecting metal substrates from acid, alkali, salt, and atmospheric corrosion.
• Eco-Friendly & Compliant: As a solvent-free and VOC-free product, it does not emit harmful gases during application and curing, fully complying with international environmental protection standards and RoHS directives. It is non-hazardous and easy to transport and store, meeting the environmental requirements of various industries.
• Wide Temperature Adaptability: Customizable curing parameters are available to adapt to different production processes, with typical curing conditions such as 180℃/15-20 minutes or 200℃/10 minutes; low-temperature curing formulas (e.g., 140℃/30 minutes) can also be developed according to customer needs.

3. Typical Technical Parameters

4. Application Fields

• Architectural Decoration: Aluminum profiles for doors and windows, curtain wall components, metal railings, canopies, and decorative steel structures;
• Home Appliances & Furniture: Exteriors of household appliances (refrigerators, washing machines, air conditioners), metal furniture (tables, chairs, cabinets), and kitchen utensils;
• Transportation Equipment: Automobile parts (wheels, rims, engine parts), railway vehicle components, highway guardrails, and marine equipment accessories;
• Industrial & Public Facilities: Instrument enclosures, electromechanical equipment casings, street lamp poles, playground equipment, bus shelters, and stadium seating;
• Luxury Decoration: Metal ornaments, decorative sculptures, and high-end commercial signage, leveraging its high-end metallic texture to enhance product value.

5. Storage & Construction Notes

5.1 Storage Requirements

• Store in a cool, dry, and well-ventilated environment with temperature below 30℃ and relative humidity below 60℃, avoiding direct sunlight, high temperature, and moisture;
• Keep away from fire sources and corrosive substances, and do not stack outdoors;
• The shelf life is 6 months under proper storage conditions. For products beyond the shelf life, they can be reused only if they pass re-inspection;
• Seal the packaging immediately after use to prevent contamination and moisture absorption.

5.2 Construction Requirements

• Substrate Pre-treatment: Conduct appropriate pre-treatment (phosphating, sandblasting, or shot blasting) according to different substrates (steel, aluminum alloy, etc.) to remove oil, rust, and moisture. The substrate surface should be clean and dry before spraying;
• Spraying Methods: Suitable for corona electrostatic spraying, triboelectric electrostatic spraying, and fluidized bed spraying (requires prior confirmation with the supplier);
• Film Thickness Control: The recommended dry film thickness is 60-80μm. Excessive thickness may cause pinholes or affect the metallic texture;
• Post-Coating Curing: Strictly follow the recommended curing parameters (temperature and time). For outdoor high-durability applications, a clear topcoat is recommended to further enhance weather resistance and protect the metallic effect;
• Safety Protection: Constructors should wear anti-static shoes and protective equipment. Avoid inhaling powder, and prohibit smoking and eating in the storage and construction areas.

6. Summary