Wednesday, May 30th, 2012

Critical Variables Corona Tribo Faraday Cage More difficult to coat recesses Easier to apply to recesses Back Ionization Easier to coat thinner films Easier to produce thicker films Products configuration Not good for complex shapes Very good for complex shapes Production requirements Wide range of line speeds Good for lower line speeds Powder Chemistry Less dependent on chemistry More dependent on chemistry

Electrostatic Spray Tribo Charging is the second most common method of spraying a powder coating. This method relies on the powder to develop a charge while passing through special hoses and guns. As powder contacts these non-conductive surfaces,electrons are stripped off of the particles due to friction. These particles then develop a powerful positive charge. No high voltage or lines of force are used which allows for easier penetration into deep recesses. Tribo charging is efficient in developing a staticRead More …

Electrostatic Spray (Corona charging) is the most common method used in powder coating .The process disperses finely ground powder into corona field at the gun tip applying a strong negative charge to each particle. These particles have a strong attraction to the grounded part and deposit there. This process can apply coatings between 20um-245um in thickness. Corona charging can be used for decorative as well as functional coatings. Virtually all resins with the exception of nylon can be applied easilyRead More …