Letter 31082

Troubleshooting granular appearance of powder coated articles  

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FIRST, I WANT TO THANK YOU ABOUT THESE GREAT EFFORTS IN THIS SITE. I WOULD LIKE TO ASK WHAT IS THE SUBSTANCE WHICH CAUSES THE ELECTROSTATIC POWDER TO GIVE GRANULAR APPEARANCE ON ARTICLES?

WITH REGARDS

Heba Mohamed Abd el Reheem
chemist - Nasr-City, Cairo, Egypt

First off, is it a problem that you are having, or just a question about the makeup of powder paint? There is a common problem with powder paints that can cause a granular effect called "seeding". It happens towards the end of the manufacturing process when the equipment is hot from running, and the paint actually starts to cure in the machine producing little grains of partially cured paint that show up quit well when applied to a smooth surface. You will usually find it in the last couple of boxes of the batch. The manufacturer will usually replace the seedy paint, you get to deal with the rejects though. I hope this is the information you were looking for.

Sheldon Taylor    supply chain electronics Wake Forest, No. Carolina

Thanks to Mr.Sheldon Taylor for your reply. But I mean there is a certain substance we add it to electrostatic powder to give a granular apperance with the colour of this powder on articles> what is the name of this chemical substance.

With regards for all who love peace and hate war.

Heba Mohamed Abd el Reheem
chemist - Nasr-City, Cairo, Egypt

Dear Sirs,

Try Polyamide 11 - Nylon. Contact your local agent for more info and samples.

Terry Hickling Martex Paints Ltd    Birmingham, UK

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