MDF (Medium Density Fiberboard) Powder Coating

Surface Finish Options Overview

Product Description

This product is a powder coating suitable for medium density fiberboard substrate (MDF) coating produced by special formula and production process. The coating film has excellent mechanical properties and indoor decorative properties, and can be widely used in surface treatment of modern furniture industry. It is generally not recommended to be used directly for surface coating of various outdoor products.

Application Field

It can be widely used in surface treatment of modern furniture industry.

Product Features

The powder coating has high utilization rate during construction;No three waste problems, in line with environmental protection requirements;Compared with traditional spray painting and film pressing process, it has lower cost;It has stronger adaptability to product switching than film pressing process, and can adopt large-scale industrial production methods;The coating film has excellent physical and chemical properties;Different coating film appearance effects can be designed.

Transport 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 avoided from direct sunlight, moisture and heat, and contact with chemicals.

Powder coating

Specific gravity	1.15~1.8g/cm° (depending on the color and gloss)
Particle size	100% less than 100 microns (can be adjusted according to the special requirements of the coating)
Powder fluidity	140-150
Construction process	1. ​​Electrostatic spray gun can be used for coating, and the film thickness is suitable to be controlled at 70-90 microns. (MDF substrate needs to be heated and homogenized in an infrared oven in advance and preheated. The specific heating temperature is determined according to the heat capacity of the MDF substrate.)
	2. Curing conditions: 140℃, 5-8 minutes (referring to the surface temperature of the MDF board). The oven can use an ordinary hot air circulation oven or a drying tunnel. If conditions permit, it is best to use an infrared oven to quickly heat and level the newly sprayed coating, and then send it to an ordinary oven for baking and curing.

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.