MT-EL-HLF59R is a one part, 100 % solids, epoxy powder coating for insulation of wire and busbars. Designed for electrostatic spray application it has excellent resistance against heat, chemicals and moisture. The coating has a good edge coverage and flexibility. It is serviceable up to 130° C.
| Typical value | Method | |
| Binder System | Epoxy resin | |
| Density | 1.75 – 1.85 g/cm³ | ISO 8130-2 |
| Gel time at 200° C | 30 – 50 sec. | modified ISO 8130-6 |
| Storage stability | 6 months from date of manufacture at ≤ 23° C | |
| Preheating temperature | 190 – 235° C object temperature | |
| Post cure conditions | 5 – 10 min. at above temperature | |
| Particle size distribution | < 32 µm = 25 – 40 % < 160 µm > 99.5 % | Malvern ISO 8130-1 |
| Color | grey, ca. RAL 7047 | |
| Recommended film thickness | 200 – 300 µm | |
| Flow | smooth | |
| Gloss at 60° angle | 40 – 60 units | ISO 2813 |
| Cross cut | Gt 0 | DIN EN ISO 2409 |
| Impact resistance | > 5 Joule | DIN 3476-1 |
| Elongation | > 5 % | DIN 3476-1 |
| Hardness | > 100 | DIN EN ISO 2815 |
| Pencil hardness | 5 H | DIN EN 13523-4 |
| Glass transition temperature |
65 ± 7° C (Tg1) 112 ± 5° C (Tg2) 40 – 60 J/g (Delta H) |
ISO 11357-2 Inflection point Inflection point |
| Temperature index | 130° C (Class B) | IEC 60216-1 |
|
Water absorption (40 h / 23° C) |
< 1 % | ASTM D 570 |
| Thermal conductivity | 0.4 – 0.5 W/(m·K) | DIN EN 821 |
| Specific surface resistivity | > 1013 Ω | IEC 60093 |
| Dielectric strength | 45 kV/mm | IEC 60243-1 |
|
Dissipation factor tan δ, 25° C Dissipation factor tan δ, 105° C |
< 0.01 < 0.01 |
ASTM D 150 ASTM D 150 |
| Dielectric constant (100 Hz – 1 MHZ) | 4.0 | ASTM D 149 |
| Comparative tracking index (CTI) | CTI 600 / CTI 175M-1.1 | IEC 60112 |
| UL 94 Vertical Burning Test | V-0 | IEC 60695-11-10 |
| Hot wire ignition (HWI) | ≥ 120 sec. | IEC 60695-2-20 |
| High current arc ignition (HAI) | ≥ 150 | UL 746A Section 32 |
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 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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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