Types of Color-Coating for PPGI Steel Coils

There are multiple chemical compounds used to colour coat steel. Depending on the type of resin used in colour coating, given below are some key types of colour-coating:

Polyester (PE)

Based on polyether, steel coils with this coating are resistant to high air temperature and corrosion. They feature colour stability, plasticity and longevity and therefore are used in roofing and wall structures, particularly for industrial buildings. These are available in different colours. Wide range of colours and brightness make it perfect for applications like interior and exterior construction materials, assembling metals, and partitions.

Polyester matt (PEMA)

PEMA has a smooth and matte surface with micro-roughness and is based on polyether. It has a longer life than PE and sports excellent colour stability with mechanical resistance. This steel can keep its property in any climate and can copy natural materials.

PVDF

PVDF is a blend of polyvinyl fluoride (80%) and acryl (20%). It shows the highest resistance to non-mechanical environmental exposure. The compound is used for wall cladding and roofing as it features excellent resistance to water, snow, acids and alkali.

Plastisol (PVC)

This polymer is made of polyvinyl chloride and plasticisers. It possesses a rather thick coating (0.2 mm) which contributes to good mechanical and weather resistance. However, it has relatively poor heat resistance and colour stability.

Polyurethane (PU)

This coating is made of polyurethane modified with polyamide and acryl. It has improved resistance to ultraviolet radiation and weather exposure, high strength and longevity. Polyurethane is highly resistant to many acids and chemicals typical in an industrial environment.

SMP, or silicone modified polyester

SMP paint systems are a combination of polyester and silicon intermediates. Silicon contributes to improving the gloss retention and weather resistance of the polyester coating. SMP-coated material is more difficult to scratch and resistant to chalk and fade.