Lootah Group

Coating Procedure

                                               

How it Works ?

Powder coating is an advanced method of applying a decorative and protective finish to a wide range of materials and products that are used by both industries and consumers. The powder used for the process is a mixture of finely ground particles of pigment and resin, which is sprayed onto a surface to be coated.

The charged powder particles adhere to the electrically grounded surfaces until heated and fused into a smooth coating in a curing oven. The result is a uniform, durable, high-quality, and attractive finish.

                         

  •     Thermoplastic powders that will re-melt when heated, and
  •     Thermosetting powders that will not re-melt upon reheating. During the curing process (in the oven) a chemical cross-linking reaction is triggered at the curing temperature and it is this chemical reaction which gives the powder coating many of its desirable properties.

Coating Procedure consists of the following stages:

1. Chemical pre-treatment process which divided into two sections.
 
First: pre-treatment sequences for steel works through 9 steps according to German standards, then drying off.
 
Second: pre-treatment sequences for Aluminium profiles through 8 steps according to German standards, then drying off.
 


2. After Drying off the work pieces are directly powder coated through an automatic powder spray booth supported with 8 super corona type powder guns, or coated with PVD F coating.
 


3. After Powder Coating the substrates, go through curing oven at a temperature of 200 degree C for 10 - 15 minutes. According to the powder specifications.


4. The final process is to insure the quality of the products through visual inspection and laboratory tests according to the qualicoat standards. Then packaging polyethylene stretch film to protect the coating film.