UV resistant powder coating
We are a manufacturer based in China, specializing in high-quality UV resistant powder coating for industrial clients worldwide. Technical support and custom formulation available.
Category：Application industries, powder Coating | Brand：MT
Introduction
UV resistant powder coating is built to keep colour, gloss and mechanical properties when a part lives outdoors. It combines a UV-stable resin system with light-stabiliser and UV-absorbing additives, so the film resists photodegradation instead of chalking, fading and embrittling under sunlight — for appliances, automotive electronics, rail, oilfield pipework, outdoor lighting and exterior facilities.
Applications
Electrical household appliances · automotive electronics · rail transit · petroleum pipes and valves · LED and outdoor lampsAerospace · fitness equipment · medical devices · tools and hardware · radiators and heat sinks · exterior facilities
Finishes span metallic, chrome-effect, wood-grain, candy and MDF-grade powder, suiting indoor steel furniture and outdoor metal such as agricultural machinery and auto parts. Good storage stability, salt-spray and weather resistance, exterior durability, corrosion and chemical resistance, with smooth heat flow and levelling.
Product Specification
| Type | Epoxy, polyester and epoxy-polyester powder coating |
| Colour / finish | RAL & Pantone; superior gloss and colour retention |
| Particle size / specific gravity | Average 32–42 µm; 1.2–1.7 g/cm³ |
| Coverage / film build | 8–10 m²/kg at 30–90 µm; build not below 60 µm |
| Spray / cure | Voltage 60–90 kV, gun distance 15–30 cm; cure 180–200°C for 10–15 min (object temperature) |
| Storage | Ventilated, dry < 25°C, RH 50–65%, away from sun/fire/heat; use within 6 months |
Test Results
| Test item | Method | Result |
|---|---|---|
| Film thickness | ISO 2360 | 60–80 µm |
| Pencil hardness | ASTM D 3363 | HB–H |
| Bending | ISO 1519 | ≤ 10 mm |
| Cross-cut, 1 mm | ISO 2409 | Class 0 |
| Impact | ASTM D 2794 | Pass |
| Cupping | ISO 1520 | ≥ 8 mm |
| Humidity, 1000 h | ISO 6270-1 | Blistering < 1 mm |
| Salt spray, 1000 h | ISO 9227 | Corrosion spread < 1 mm |
How UV Degrades a Film — and How to Resist It
UV radiation attacks a film in two ways: it fades organic pigments, and it drives photodegradation that breaks the resin backbone — shown as gloss loss, chalking, brittleness and eventual cracking. Resisting it is a system choice, not a single additive.
- Pick the right resin. Polyester, acrylic and polyurethane-based powders are UV-stable; epoxy chalks quickly outdoors and is for interior use only.
- Use light stabilisers. HALS (hindered amine light stabilisers) scavenge UV-generated radicals and dissipate the energy as heat; UV absorbers do the same on the pigment side.
- Choose robust pigments. Titanium dioxide and iron-oxide-based pigments scatter/reflect UV better than cheap organic dyestuffs, which bleed and fade fast.
- Build the film correctly. Thin films chalk sooner; hold 60–80 µm, cure to object temperature, and pretreat the metal properly — UV resistance only counts when the film stays bonded.
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