EP hybrid powder coating

Surface Finish Options Overview

Product description

It is made of epoxy resin and polyester resin as the main raw materials, and has their own unique properties, so that the produced coating has excellent leveling, decorative, mechanical properties and strong corrosion resistance.

Application areas:

Widely used in the coating of various indoor metal products.

Physical properties:

1. Specific gravity: 1.2-1.8 (depending on color and gloss)

2. Storage: Below 35℃, in a dry environment, it can be stored for 12 months if the packaging is intact.

3. Packaging: 20 kg/box, carton packaging, lined with two layers of polyethylene inner bags.

Coating performance:

Application instructions:

Surface treatment: Treat according to the substrate and required performance

Spraying: Electrostatic gun or friction gun

Film thickness: 60-70 um

Curing conditions: Workpiece temperature/time: 180℃ x 15 minutes

Hygene & Safety:

This powder coating is a non-toxic product, but dust should be avoided during use. Operators are advised to wear appropriate dust masks and glasses. If possible, try to avoid long-term contact between skin and powder coating.

Safety & protection

All dust is irritating to the respiratory system, so avoid inhaling dust and steam generated during curing. Take measures to avoid skin contact. If contact is necessary, wash the skin with water and soap. If contact with the eyes is necessary, wash immediately with clean water and seek medical attention in time. Ash layer and powder particle deposition should be avoided on the surface and dead corners. Tiny organic particles will be ignited and explode under static electricity. All equipment must be grounded to prevent static electricity.

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.