Polyester Powder Coating MT-620 AM

Polyester Powder Coating MT-620 AM About

Product Description

MT-620 AM is a series of polyester based powder coatings, formulated without the use of TGIC, designed for the exterior environment, offering the benefits of MT 600 in combination with specific antimicrobial activity. MT-620 AM powders are available in a wide range of colors in gloss, satin, matt, metallic and textured effects and can be custom matched to the users requirements.

Powder properties

	Typical value
Chemical Type	Polyester TGIC Free
Density	1.2 1.9 g/cm, depending on colour and effect
Application	Suitable for electrostatic spray
Shelf life	24 months below 30 C 12 months below 35 C
Storage Conditions	Under dry, cool ( 30C) conditions (open boxes must be resealed)
Curing schedule	30-40 min at 170C 10-20 min at 180C 8-16 min at 200C (at object temperature)

Test conditions

The results shown below are based on mechanical and chemical tests which (unless otherwise indicated) have been carried out under laboratory conditions and are given for guidance only. Actual product performance will depend upon the circumstances under which the product is used.

Pre-treatment	Gold Seal lightweight Zinc Phosphate
Substrate	Gold Seal polished 0.5mm steel
Curing schedule (Object Temperature)	10 minutes at 200C
Film Thickness	50 microns

Mechanical tests

Adhesion	ISO 2409 (2mm crosshatch)	Gt 0
Erichsen cupping	ISO 1520	7 mm
Flexibility	ISO 1519	Pass 5mm
Hardness	Pass no penetration to substrate	ISO 1518-1 (2000g)
Impact	ISO 6272	> 50 kgcm direct

Pretreatment

Aluminium, steel or Zintec surfaces to be coated must be clean and free from grease. Iron phosphate and particularly lightweight zinc phosphating of ferrous metals improves corrosion resistance. Aluminium substrates may require a chromate conversion coating. Detailed advice should be sought from the pre-treatment supplier.

Application

MT-620 AM powder coatings can be applied by corona electrostatic equipment. In all application processes the aspect obtained is subject to variation, depending on the method of application (type of gun, nozzle, etc) and the shape/type of component. We recommend that the actual application parameters are adapted and adjusted depending on the type of component and with each powder batch to give a finish in accordance with our color card. The following procedure is given as a guideline when using these finishes. We recommend the use of flat jet spray nozzles. To ensure powder homogeneity, the complete content of the boxes should be emptied completely into the feed hopper. For manual application it is essential to ensure that an even film thickness is applied, and, in all Instances, sinusoidal gun movements should be avoided. All powders can show small color differences from batch to batch, this is normal and unavoidable. Applicators and fabricators are advised to use a single batch for parts that will be assembled together. Differences are more likely with special effect powders. Bonded products have better application properties than blended products (more stable) but attention should still be paid to line settings to avoid marble effect and changes in aspect after recycling. Different substrates (Aluminium, steel, galvanized steel, etc.), 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 color and gloss.

Superior Metal Surface Protection

MT-620 AM provides outstanding shielding for metal surfaces against harsh weather, UV rays, and daily wear. With its excellent adhesion and hardness, this coating helps extend the service life of your metal assets, delivering both functional and aesthetic benefits.


Customizable Colors and Packaging

Available in a variety of shades based on customer specifications, this powder coating adapts to any project's visual requirements. The customizable pack sizes (typically 20-25 kg) in drums, barrels, or cartons ensure versatility for different application needs.


Efficient and Reliable Application Process

Designed for use with electrostatic spray equipment, the powder forms a uniform coat and cures quickly at 180C-200C in just 10-15 minutes. Achieving optimal results is straightforward, thanks to its recommended film thickness and compatibility with common industrial workflows.