MT-300 is a series of polyester resin based thermo-setting powder coatings formulated using TGIC. The pigments used in the MT-300 series restrict the field of application of this powder coatings class to interior uses. MT-300 is designed for interior decoration such as, metal furniture, shop fittings, shelves, light fittings.
| Valor típico | |
| Tipo Químico | Poliéster – TGIC |
| Densidade | 1.2 – 1.9 g/cm³, dependendo da cor e do efecto |
| Grosor de película recomendado | 60-90 µm |
| Prazo de validez | 12 meses por debaixo de 30 ºC |
| Condicións de almacenamento | (open boxes must be resealed) Dry, cool conditions |
| Horario de curado | 12-24 minutos a 180 °C 8-16 minutos a 200 °C 4-10 minutos a 210 °C (á temperatura do obxecto) |
Galvanised steel requires surface preparation by either multi-stage pretreatment using either zinc phosphate or chromate conversion or controlled sweep blasting. Depending on the type of galvanizing, degassing or use of anti-bubbling additives may be required – follow the procedural advice of the pretreatment supplier. Iron phosphate and particularly Zinc phosphating of ferrous metals improves corrosion resistance. Aluminium substrates may require a chromate conversion coating.
Powders can be applied by manual or automatic electrostatic spray equipment. A good protection is linked with the recommended film thickness. Bonded products have better application properties than blended products (more stable) but attention should still be paid to line settings in order to avoid “marble effect” and changes in aspect after recycling. Different substrates (aluminium, steel, galvanized steel…), use of primer, and big changes in film thickness may give a different aspect. Products with different codes should not be mixed even if same colour and gloss. It is recommended that for consistent application and appearance product be fluidized during application. MT-300 powder coatings can be applied by corona electrostatic or tribostatic equipment. However, the aspect obtained by tribo static equipment may vary when compared to electrostatic application and/or our color card.
Actual product performance will depend upon the circumstances under which the product is used. Testing has been determined under laboratory conditions using the following application properties and is for guidance only.
| Tratamento previo | Fosfato de cinc |
| Substrato | Polished steel |
| Horario de curado | 12 min at 200°C (object temperature) |
| Espesor da película | 60-70 µm |
| Valor típico | Método/estándar | |
| adhesión | Clase 0 | ISO 2409 (trama cruzada de 2 mm) |
| Ventosa de Erichsen | Pasar 5 mm | ISO 1520 |
| Flexibilidade | Pasar 5 mm | ISO 1519 |
| Dureza | Pasa – sen penetración no substrato | ISO 1518-1 (2000g) |
| Resistencia ó impacto | ≥30 kg.cm | ISO 6272-2 (d/r) |
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