High-hardness powder coatings
WA：+86 132 6275 2056
WEB: std-coatings.com
Introduction
High-hardness powder coating products conform to the national standard GB/T6739. When coated with a Mitsubishi drawing pencil with a hardness of 5H, the coating surface is scratch-free and possesses excellent physical and mechanical properties.
Application
High-hardness powder coatings have excellent scratch resistance and wear resistance, and can be widely used in 3C manufacturing, stair railings, furniture and interior wall panels of public facilities.
Features
| Item | Specification |
|---|---|
| Chemical Type | Epoxy/Polyester or Pure Polyester Type |
| Appearance | Flat |
| Curing Condition (Workpiece Temperature) | 200℃ / 10min; improper curing may cause loss of color, gloss, and coating performance |
| Gloss | Depends on specific product |
| Storage Condition | Sealed and stored in a dry, cool place below 30℃ |
| Shelf Life | 6 months (<30℃), 12 months (<25℃) |
| Packaging Specification | 25kg/carton |
Technical indicators
Note: Substrate and pretreatment: Mechanical performance testing used 0.6mm thick degreased cold-rolled steel sheet; corrosion aging resistance testing used 0.6mm thick zinc-based phosphated steel sheet or chromated aluminum sheet.
• Film thickness: 60-80μm
• Curing conditions: 200℃/10min (workpiece temperature)
| Item | Index | Test Standard |
|---|---|---|
| Bending | Passed, curvature diameter 6mm | ASTM D522 |
| Passed, curvature diameter 4mm | GB/T 1731 | |
| Dry Adhesion | Passed, result 5B | ASTM D3359 |
| Passed, result Grade 0 | ISO 2409 | |
| Cupping Test | Passed, 6mm, no cracking/peeling | ISO1520 |
| Passed, 6mm, no cracking/peeling | GB/T 9753 | |
| Impact Resistance (Direct Impact) | ≥50kg·cm | ASTM D2794 |
| ≥50kg·cm | GB/T 1732 | |
| Pencil Hardness | ≥H | ASTM D3363 |
| ≥H | GB/T 6739 | |
| Chemical Resistance | Good (tested with general acids, alkalis, oils at room temperature) | / |
| Water Mist Resistance | Passed, 1000h, no blistering or loss of gloss | ASTM D1735 |
| Water Immersion Resistance | Passed, 240h, no blistering or loss of gloss | ASTM D870 |
| Neutral Salt Spray | Passed, 500h, no blistering or peeling | ISO 9227 |
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