Polyester/TGIC powder coating series

Surface Finish Options Overview

Made of polyester resin and TGIC curing agent as the main raw materials.

Features:

—Good adhesion, excellent mechanical properties, tough coating.

—Smooth coating

—Good outdoor durability

—Excellent over-baking resistance

Application:

Suitable for decoration and protection of a variety of outdoor products such as: outdoor lighting, beach chairs, solar water heaters, air conditioning outdoor units, aluminum profile curtain walls, door and window frames, ceilings, highway guardrails, grilles, sports facilities, communication equipment, etc.

Product series:

—Standard weather-resistant and super weather-resistant products can be provided

—Products with various glosses and colors can be made, and the specific gloss and color are subject to user requirements

—Products with various artistic textures such as sand grain, wrinkle, continuous paint, hammer grain, etc.

Application parameters:

Curing time: 200℃×10–15 minutes

Spraying method: high voltage electrostatic spraying 60-80 KV

Recommended film thickness: 60-80 um

The above tests all use 0.8mm degreased and rusted cold-rolled steel plates, with a coating thickness of 40-80um. The performance indicators of the coating will vary slightly with the gloss.

This product does not contain arsenic, selenium, lead, hexavalent chromium, mercury, antimony, cadmium, and other heavy metals, and meets RoHS requirements.

Storage conditions: Store in a dry and ventilated room at around 25℃, avoid direct sunlight. Under this condition, the powder can be stored for 6-12 months. If it is overdue, it can be re-inspected. If the result meets the requirements, it can still be used.

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.