What is thermoplastic coating?

What are the application and different uses of "waste powder coating"?

• What are the application and different uses of "waste powder coating" which is lying in bulk with me in various colors? I am looking to sell my bulk of "waste powder coating material" of different colors.

• Answer:

  Hello rajpal, Although I have never actually used the powder coat process, I am somewhat familiar with the finished product and the application. My first thought when I read your question was that "overspray" or as you say "waste powder coating" should be recycled. I found the following information which confirms my understanding of the process: http://www.pfonline.com/articles/080305.html And since it is a dry powder, most powder coating overspray (up to 98%) can be readily retrieved and re-used. The unused powder is reclaimed by a recovery unit and returned to a feed hopper for recirculating through the system. The waste that results is negligible, and can be disposed of easily and economically. The powder spray booth is designed to safely contain the powder so that overspray cannot migrate into other areas. The entrance and exit openings must be properly sized to allow clearance of the largest product part. The airflow through the booth must be sufficient to channel all overspray to the recovery system, but not so forceful that it disrupts the powder deposition and retention on the part. If one booth is to be used for multiple colors, the booth interior should be free of narrow crevices, seams, and irregular surfaces that would be difficult to clean, especially if collected overspray is to be recycled. The powder recovery systems make use of either cyclones or cartridge filter modules that can be dedicated to each color and easily removed and replaced when a color change is needed. Equipment manufacturers have made significant design improvements in powder spray booths that both allow color changes to be made with a minimal downtime and allow the recovery of a high percentage of the overspray, which can raise powder use to nearly 100%. You can see from this that it is standard industry practice to recycle overspray. Your bulk "waste powder coating" should be able to be used by anyone who has a requirement for the exact colors you have in stock. However, I would think that you would have to somehow assure the buyer of the quality/purity of your product. Thanks for your interesting question, Redhoss