Knowledge

Prepainted or color coated aluminum can be found in a multitude of household products. From refrigerators, to air conditioners, to construction material, prepainted steel can be found everywhere. Different coatings can be applied for different demands. Coil coating is a continuous, automated process for coating metal before fabrication into end products. The aluminum substrate is delivered in coil form from the rolling mills. The aluminum coil is positioned at the beginning of the coating line, and in one continuous process, the coil is unwound, pre-cleaned, pre-treated, pre-primed, and prepainted before being recoiled on the other end and packaged for shipment.Since the process allows metals to be finished in one continuous pass through a sophisticated processing line, there is tremendous flexibility in how the aluminum coil is coated and the types of coatings. As a full service aluminum coil coater, Henan Henry offers a complete line of coating finishes including Polyesters, Fluorocarbons (PVDF) and Plastisol (PVC). Coatings are available for interior or exterior and for warranted or non-warranted applications. Prepainted aluminum coils can be printed, striped, and embossed to create special visual effects.

The following steps take place on a modern coating line

Step One - Stitching the strip to the previous coil

Step Two - Cleaning the strip

Step Three - Power brushing

Step Four - Pre-treating with chemicals

Step Five - Drying the strip

Step Six - Applying primer on one or both sides

Step Seven - Curing (15-60 seconds)

Step Eight - Cooling the strip

Step Nine - Top coating on one or both sides

Step Ten - Second curing

Step Eleven - Cooling down to room temperature

Step Twelve - Rewinding of the coated coil

The benifits of coil coating

• Cost savings compared to other coating processes
  

• Consistent colour and layer thickness across batches

• Superior, uniform quality and exterior durability

• Large choice in colours and coating qualities

• Easy to handle and shape

• Most ‘green’ and efficient coating process