How does the powder coating process work?

All Now Aluminium bifolding doors are powder coated to your exact RAL specifications and ensure durability for years to come, but what is powder coating and how does it work?

Well, firstly, the profile must be washed completely clean and degreased – free from any contamination such as dust, rust, water, oils or grease. This can involve various different methods but is vital that all moisture is removed, dried and pre-treated before moving to the next stage and allows for the powder coated film to adhere to the aluminium surface more strongly.

Now, you’re ready to start spraying the bifold doors. Like the doors themselves, it’s important that all the spraying equipment and environment is clean and free from any contamination. The powder must be sprayed at a specific rate and coat the aluminium evenly – this ensures the surface doesn’t become uneven and stays smooth which can happen if there is too much/little powder or too much/little air in the mix. The powder is charged and as such, attracted to the aluminium – unlike other processes, powder coating is a dry process. Once the profile is coated, you must apply heat to melt and fuse the powder to the surface. It is important to ensure the right amount of heat is applied for the correct amount of time otherwise the finish won’t bond and won’t appear as intended. It also won’t have the longevity and durability that you expect from powder coating. In addition, the doors need to be left to cool sufficiently before moving onto the next step.

A precise coating process is required to provide your doors with the colour, durability and finish you require for your new set of bifolding doors. Whatsmore, they will continue to look as good as new for many years to come with minimal maintenance and care.