Polyester-Epoxy Powder Coating

Surface Finish Options Overview

Product Introduction:

This series of products is a thermosetting powder coating made from a mixture of saturated polyester resin, corresponding curing agents, pigments, fillers, and other specialized additives. It features excellent weather resistance, UV resistance, and thermal stability.

Product Usage:

Suitable for coating and protection of office furniture, equipment, electrical devices, home appliances, sports equipment, automotive parts, architectural windows and doors, aluminum profiles, electrical cabinets, boxes, and other metal surfaces.

Powder Performance:

Property	Specification	Notes
Gloss	Referenced to GB1734-79 standard	Measured with a 60° glossmeter
Mechanical Properties	Referenced to GB1727-92 standard	Film thickness 60-80um, tested under laboratory conditions
Corrosion Resistance	Tested on oil-free, rust-free, zinc-phosphated panels	Film thickness 100-120um, tested under laboratory conditions
Curing Conditions	Referenced to workpiece temperature	Deviations in temperature may affect performance

Coating Appearance:

Property	Specification	Notes
Gloss	Referenced to GB1734-79 standard	Measured with a 60° glossmeter

Mechanical Properties:

Property	Specification	Notes
Standard	GB1727-92	Film thickness 60-80um, tested under laboratory conditions

Corrosion Resistance:

Property	Specification	Notes
Preparation	Oil-free, rust-free, zinc-phosphated panels	Film thickness 100-120um, tested under laboratory conditions

Curing Conditions:

Property	Specification	Notes
Temperature	Referenced to workpiece temperature	Deviations may affect performance

Application Parameters:

Parameter	Specification	Notes
Applicable Equipment	Frictional charging spray, corona electrostatic spray, electrostatic fluidized bed
Film Thickness	50-150um	Adjustable according to workpiece requirements
Coverage Rate	8-11㎡/kg	For a film thickness of 60um, depending on type and workpiece requirements
Calculation Formula	Specific gravity × film thickness = grams per square meter

Storage Period:

Condition	Specification	Notes
Temperature	Below 30°C	Dry conditions
Duration	12 months
Re-sealing	Immediately after use	To prevent moisture absorption
Packaging	20kg paper boxes with an inner plastic liner	Minimum packaging 3kg

Health and Safety:

Property	Specification	Notes
Toxicity	Non-toxic
Flammability	Non-flammable
Regulation	GB15607-1995	Coating operation safety regulations

Precautions:

Item	Specification	Notes
Mixing Powders	Do not mix different types
Outdoor Use	Not recommended	Long-term exposure may cause fading and chalking
Enhanced Weather Resistance	Use company’s outdoor-specific coatings

Types of powder coating

Powder coatings can be categorized by resin system (epoxy, polyester, hybrid, polyurethane), appearance (smooth, texture, hammer, metallic, pearlescent), or performance level (anti-corrosion, heat-resistant, UV-resistant, architectural grade, automotive grade).

Powder coating colours and effects

Powder coatings offer thousands of colors in gloss, matte, satin, metallic, candy, texture, wrinkle, hammer tone, wood grain, fluorescent, and other custom effects. Special powders can create soft-touch, anti-scratch, anti-fingerprint, or anti-graffiti surfaces.

Powder coating process

The process generally includes surface pretreatment (degreasing, phosphating, chromating, sandblasting), drying, electrostatic spraying, curing in an oven, and cooling. A well-controlled pretreatment and curing process ensures strong adhesion and long service life.

Powder coating benefits

Powder coatings are environmentally friendly, solvent-free, and produce minimal waste. They offer excellent corrosion resistance, weather durability, mechanical strength, and uniform film appearance. The coating is tough, impact-resistant, scratch-resistant, and has a long lifespan.

Applications for Powder Coatings

Powder coatings are widely used in appliances, aluminum profiles, architectural components, automotive parts, bicycles, furniture, outdoor equipment, machinery, electrical cabinets, pipeline systems, and general industrial and consumer goods.

FAQ

What is Powder Coating?

Powder coating is a dry finishing technology where finely ground powder is electrostatically sprayed onto a metal or non-metal surface and then cured at high temperature. After curing, the powder melts into a continuous, durable, and decorative coating layer.

What does powder coating do?

Powder coating protects the substrate from corrosion, weathering, chemical attack, and mechanical wear. It also provides decorative appearance with rich colors, gloss levels, textures, and special effects.

Is powder coating better than paint?

In many industrial applications, powder coating outperforms liquid paint. It forms a thicker and tougher coating, resists corrosion and chemicals better, and does not contain VOCs. It also provides excellent consistency and cost-effective mass production.

Why is it called powder coating?

It is called powder coating because the coating material is a solid powder instead of a liquid paint. The coating is formed by melting and curing powder particles under heat.

What are the different types of powder coating?

Powder coatings include several families depending on resin chemistry:

• Epoxy powders

• Polyester powders

• Epoxy-polyester hybrid powders

• Polyurethane powders

• Acrylic powders

• Fluorocarbon (PVDF) powders

Each type has its own performance features such as corrosion resistance, UV resistance, chemical resistance, outdoor durability, or decorative properties.

Which material is used in powder coating?

Powder coatings are based on thermoset or thermoplastic resins combined with pigments, curing agents, fillers, additives, and in some cases metallic or effect particles. Common substrates include steel, aluminum, galvanized metal, MDF, and certain heat-resistant plastics.

How long will powder coating last?

The lifespan depends on powder type, film thickness, application method, pretreatment, and service environment. Indoor coatings can last more than 10–20 years. High-grade outdoor polyester or fluorocarbon powders can last 15–25 years or longer under UV exposure.