Weather-resistant matte powder coating

Surface Finish Options Overview

Product description

This series of products uses saturated polyester resin and acrylic resin as the main base materials to make thermosetting powder coating.

Product characteristics

The gloss can reach 2-5% (60°), soft and pleasing to the eye;Good fluidity, smooth and delicate appearance and feel;Suitable for long-term outdoor use;Good adhesion and good impact resistance;Good baking yellowing resistance;Reasonable price and low cost.

Application areas

1. Outdoor lamps;

2. Courtyard leisure facilities;

3. Building materials;

4. Aluminum ceilings and profiles;

5. Other outdoor low-gloss coatings.

Transportation packaging

Carton packaging, lined with two layers of polyvinyl chloride plastic bags, net weight of each box is 20kg. Non-hazardous items can be transported in various ways, but should be kept away from direct sunlight, moisture and heat, and contact with chemicals.

Hygiene and safety

Operators should wear dust masks during use to avoid inhaling dust and minimize long-term contact between skin and powder coating. Paint attached to the skin can be washed with soap.

Powder properties

Specific gravity	1.4~1.8g/cm’ (depending on the formula and color)
Particle size	Depending on the purpose, the standard type has an average particle size of 35~40 microns, less than 10 microns of powder <10%, more than 100 microns of powder <0.5%.
Storage stability	Outdoor matte powder coatings should be stored in a dry, ventilated room below 30°C, and avoid direct sunlight. If stored in an air-conditioned room, the powder must be stored at room temperature or the same (temperature) as the spraying equipment before use to avoid moisture. Under this condition, the powder can be stably stored for 6 months. If it exceeds the period, it must be re-tested. If the result meets the requirements, it can still be used.

Film properties

Test items	Inspection standard or method	Inspection index
Appearance	Visual inspection	Various board surface effects
Impact	GB/T 1732	≥50Kg·cm
Bending	GB/T 6742	≤2mm
Cupping	GB/T 9753	≥8mm
Hardness	GB/T 6739	≥H~2H
Adhesion	GB/T 9286	Level 0
Neutral salt spray resistance	GB/T 1771	500h; Scribed area: unidirectional rust ≤2.0mm; Unscribed area: no abnormality
Moisture and heat resistance	GB/T 1740	500h No abnormality
Artificial weather aging resistance	GB/T 1865	800h; Discoloration ≤2 level; Gloss loss ≤2 level
The above coating performance indicators may decrease slightly as the gloss decreases.
Spraying	This series of products are suitable for the following spraying methods: corona electrostatic spraying; friction electrostatic spraying; electrostatic fluidized bed spraying; fluidized bed hot dip coating.
	Coating thickness: Use between 40~150 microns, recommended film thickness is 50~80 microns.
Curing conditions	200℃/15 minutes is recommended, and it can also be designed according to user needs:180℃/15min etc.

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.