POLYAMIDE COATING POWDER WITH SMALL PARTICLE SIZE TO PROVIDE VERY THIN AND HOMOGENEOUS COATING, AS COMPARED TO THE FILM MADE OF CONVENTIONAL POLYAMIDE COATING POWDER

摘要

PURPOSE: A polyamide coating powder with a small particle size is provided to achieve very thin and homogeneous coating on a metal pipe by using a fluidized bed coating method. CONSTITUTION: The polyamide coating powder has an average particle size(d50) of 20-90 micrometers, and comprises less than 1% of particles with the size of 5 micrometers or less and 75% or more of spherical particles of which three axes x, y and z are within the range of±10%. The polyamide is selected from Nylon 11 and Nylon 12.