Thermosetting Decorative Powder Coating

Surface Finish Options Overview

I. Product Introduction

Thermosetting decorative powder coating is a new generation of metal surface treatment technology. It forms a wear-resistant, corrosion-resistant, and highly decorative coating through the process of electrostatic spraying and high-temperature curing. This coating is widely used in home appliances, building materials, automotive parts, and outdoor facilities. It features zero VOC emissions and meets RoHS/REACH environmental certifications, making it a green alternative to traditional paints.

II. Technical Parameters

Adhesion: 0 grade (cross-cut method) (ASTM D3359)

Salt spray resistance: No bubbling after 1000 hours (ASTM B117)

Pencil hardness: ≥ 2H (ASTM D3363)

Gloss: Adjustable from 10 to 95 GU (ISO 2813)

III. Product Highlights

Vibrant Colors and Endless Creativity: We offer a wide range of color options, from classic solid colors to brilliant metallic finishes, unique fluorescent and transparent effects, fulfilling all your color fantasies and adding unique charm to your work.

Strong Thermosetting and Durability: Advanced thermosetting technology ensures the coating forms a tough layer after heating, with excellent wear and corrosion resistance. It maintains its vibrant color even in harsh environments.

Environmentally Friendly and Safe: No solvents, low VOC emissions, compliance with national environmental standards, odorless during application, ensuring the health and safety of workers and users, creating a green living space.

Easy to Apply and Efficient: Powder coatings can be applied via electrostatic spraying or fluidized bed dipping. The process is simple, with fast drying, significantly improving application efficiency, reducing project time, and lowering costs.

Artistic Texture and Enhanced Value: Unique decorative effects, such as textures, metallic finishes, and contrasts between matte and glossy finishes, significantly enhance the visual appeal and added value of products, making your work stand out among competitors.

IV. Application Scenarios

Home Appliance Industry

Refrigerator/oven/air conditioner casings: Anti-fingerprint matte coatings for aesthetics and easy cleaning.

Washing machine inner cylinders: Corrosion-resistant coatings to extend lifespan.

Automotive Parts

Wheels/chassis: Metallic glossy coatings for visual upgrade.

Engine hoods: High-temperature textured coatings (-50°C to 200°C stability).

Construction and Outdoor Facilities

Aluminum curtain walls/balustrades: UV-resistant fluorocarbon powders for 20-year outdoor color retention.

Streetlights/traffic signs: Reflective coatings for enhanced night-time visibility.

Creative Design Field

Furniture/art: Wood grain or stone grain coatings to achieve natural material textures at low cost.

Electronics: Gradient coatings for differentiated appearance.

FAQ

1. What is Powder Coating?

Powder coating is a dry finishing process used to apply a protective and decorative coating on metal or other surfaces. Instead of using liquid paint, fine powder particles (usually made of polyester, epoxy, or hybrid resins) are electrostatically charged and sprayed onto a conductive surface. The coated object is then baked in an oven, where the powder melts, flows, and cures into a smooth, durable finish.

Key features:

Durable, hard finish

Resistant to scratches, corrosion, and UV

Environmentally friendly (no VOCs)

2. Benefits of Powder Coating

Powder coating offers several advantages over traditional liquid painting:

Durability: Resistant to chipping, scratching, fading, and wear.

Corrosion Protection: Provides excellent protection against rust and chemicals.

Environmentally Friendly: No volatile organic compounds (VOCs) and minimal waste.

Efficiency: Overspray can be collected and reused, up to 99% material utilization.

Uniform Finish: Smooth, even coating without runs or drips.

Cost-Effective: Single-coat systems can achieve high film thickness, reducing labor and energy.

Aesthetic Variety: Wide range of colors, textures, and effects.

3. What Temperature to Cure Powder Coating

The curing temperature depends on the type of powder used:

Epoxy powder: ~160–200°C (320–392°F)

Polyester powder: ~180–210°C (356–410°F)

Hybrid (Epoxy-Polyester) powder: ~180–200°C (356–392°F)

Typical curing time: 10–20 minutes depending on thickness and oven type.

Always follow the powder manufacturer’s specifications for best results.

4. Process for Powder Coating

The powder coating process usually follows these steps:

Surface Preparation:

Clean the surface thoroughly (remove oil, grease, rust, or dirt)

Methods: chemical cleaning, sandblasting, or phosphating

Pre-Treatment:

Apply a conversion coating or primer if needed to improve adhesion

Powder Application:

Spray the powder using an electrostatic spray gun or fluidized bed

Curing:

Bake the coated object in an oven at the recommended temperature for the powder type

The powder melts and forms a continuous, smooth film

Cooling & Inspection:

Let the coated item cool

Inspect for defects, uniform coverage, and desired thickness

5. How to Spray Powder Coat

Equipment Needed:

Electrostatic spray gun

Compressed air supply

Powder feed hopper or container

Grounding of the object

Steps:

Ground the object: Ensures the charged powder is attracted to the surface.

Spray evenly: Hold the gun 6–12 inches from the surface, moving in smooth, overlapping strokes.

Apply sufficient powder: Ensure full coverage without excessive buildup.

Cure immediately: Transfer the sprayed item to the curing oven to fuse the powder into a solid coating.

Tips:

Maintain consistent speed and distance while spraying.

Use proper ventilation to reduce airborne powder accumulation.

Test a small area to check film thickness and color before full application.