Issues encountered in powder coating products—such as poor leveling, low edge coverage, powder clumping, and cratering in the paint film—primarily stem from problems in the following key areas:

The Impact of Production Line Adjustments on Powder Coating Quality

  • Raw Material Mixing: The high-speed mixing process directly impacts the color-matching quality of powder coatings; furthermore, severe wall adhesion within the mixer can compromise both color-matching accuracy and formula uniformity.
  • Extruder Zone Temperature: If the extruder temperature is either too low or too high, it will result in poor dispersion and compromise the quality of the coating film.
  • ACM Air Classification Mill Adjustment: An excessively high proportion of either coarse or fine powder will lead to quality issues.

Raw Material Selection and Proportioning

  • Resin: The structure and properties of the resin determine the quality of the powder coating and the paint film.
  • Curing Agent: If the gel time of a powder coating is excessively rapid, it will result in poor leveling and poor adhesion.
  • Additives: Certain additives eliminate pinholes in the paint film caused by moisture introduced through the raw materials.
  • Pigments and Fillers: The type of pigments and fillers used, as well as their proportion within the formulation, directly influence the performance of the paint film.

Construction Applications

  • Powder Coating Efficiency： Powder transfer efficiency is influenced by equipment calibration, electrostatic properties, particle size, and environmental conditions.