Antibacterial powder coating

Surface Finish Options Overview

Made of inorganic antibacterial agent, it has long-term antibacterial properties and is suitable for indoor and outdoor environments.

Features:

— Prevent the growth of Escherichia coli, Aspergillus flavus, Staphylococcus luteus, Penicillium citrinum, Chromobacterium citrifolium, Mucor racemosus, Mycelium dermatophyte, Rhodococcus rhodopsinus, etc.

— Long-term
— Can reach 4N-5N (99.99-99.999%)

Applications:

— Kitchenware: dishwashers, stoves, cabinets, etc.
— Household appliances: refrigerators, freezers, water dispensers, microwave ovens, etc.
— Medical equipment: medical beds, 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 derusted cold-rolled steel plates, with a coating thickness of 40 to 80um. The performance indicators of the coating will vary slightly with the gloss.

This product does not contain heavy metals such as arsenic, selenium, lead, hexavalent chromium, mercury, antimony, cadmium, etc., and meets RoHS requirements.
Storage conditions: Store in a dry and ventilated room at around 25°C, avoid direct sunlight. Under this condition, the powder can be stored for 6-12 months. If it exceeds the period, it can be re-inspected and can still be used if the results meet the requirements.

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.