Transparent powder coating

Surface Finish Options Overview

Product Overview

This series of products is made of polyurethane or acrylic resin with curing agent, and is a transparent powder coating with high transparency and excellent flatness resistance.

Application areas

Main applications:

Automobile topcoat and exterior partsAutomobile wheel coatingIndoor and outdoor metal parts protectionHigh-performance finish layer for various metal appliances

Typical application scenarios:

High-end metal furnitureHigh-end hardware productsBicycle partsHigh-end door handlesHigh-end craft productsGloss protection layer for metal powder coatings

Technical parameters

Basic properties of powder:

Specific gravity: 1.1~1.3g/cm³

Volatile matter: <0.5%~2% (depending on product type)

Flow rate: >130 (with good fluidization and conveying performance)

Features

	Category	Features	Curing conditions
PE/TGIC	Polyester/TGIC	Good leveling, excellent weather resistance, good transparency	200℃/10min
	Polyester/TGIC	Good leveling, excellent weather resistance, good transparency	200℃/10min
PU	polyurethane type	Good leveling, excellent weather resistance, good transparency	200℃/15min
Acrylic/PU	Mixed acrylic	Good leveling, excellent weather resistance, excellent weather resistance, solvent resistance	200℃/10min
Acrylic	Acrylic	Excellent weather resistance and solvent resistance, Impact resistance can reach ±10kg.com. 200℃/10min 170℃/20min	170℃/20min

Coating performance

Item	Reference standard	PE/TGIC	PU type	Acrylic/PU	Acrylic
Appearance	GB5237.4	Flat	Flat	Flat	Flat
Leveling	Q/TXSLD01-03	Grade C	Grade B	Grade B	Grade A
Transparency	Q/TXSLD01-03	Grade B	Grade B	Grade B	Grade A
Impact	GB/T1732-93	±50kg.cm	±50kg.cm	±50kg.cm	±50kg.cm
Cupping	GB/T9753-88	>6mm	>6mm	>6mm	>6mm
Adhesion	GB/T9286-98	Grade 0	Grade 0	Grade 0	Grade 0
Bending	GB6742-86	Φ2mm	Φ2mm	Φ2mm	Φ2mm
Indentation hardness	GB9275	≥80	≥80	≥80	≥80
Salt spray test	GB/T1771-91	No change after 1000 hours	No change after 1000 hours	No change after 1000 hours	No change after 1000 hours
Wet heat test	GB/T1740-79	1000 hours level 1	1000 hours level 1	1000 hours level 1	1000 hours level 1
Aging test Light aging	Light aging: ASTMG154QUV0.78w/m2@340nm500h	Gloss retention rate ≥80%	Gloss retention rate ≥80%	Gloss retention rate ≥80%	Gloss retention rate ≥80%
Note: The above tests all use 0.7mm thick degreased aluminum plates with a film thickness of 60-80μm; the above parameters are laboratory data and are for reference only. The actual indicators are related to factors such as customer environment, equipment, substrate, pretreatment, and spraying process.

Packing specifications

Standard packaging: carton lined with plastic bag

Net weight per box: 20kg

Transportation classification: non-hazardous goods

Safety instructions

Raw materials do not contain highly toxic substances

Precautions for use:

Avoid inhalation of dust (it is recommended to wear a dust mask)Reduce direct skin contactSkin contamination can be washed with soapAvoid contact with chemicals during storage

 

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.