Bonding technology and characteristics of metal powder coating

Bonding technology of metal powder coating is a combination of dry mixing and heat treatment The bottom powder of powder coating is added into the high-speed mixer with temperature control jacket The high-speed rotation of the mixing equipment can produce friction due to the different movement speed between the mixing paddle and the mixed material in a short time The friction heat causes the temperature of the base material mixture to rise When the material temperature is close to the glass transition temperature (TG) of resin, under the high-speed stirring of nitrogen protection and equipment, the metal pigment is quickly added into the powder with high-speed rotation to make it stick on the surface of softened powder coating particles, and then the material is quickly discharged and cooled, which is the bonding process of powder coating Bonding technology of powder coating is also called hot bonding technology of metal powder coating The characteristics of bonding powder coating are as follows: · less loss of bonding powder coating, easy to get uniform metal color; · utilization rate of powder is close to 100%, the same as that of ordinary powder; · there is no problem of metal pigment accumulation and muzzle blockage when electrostatic gun spraying is used; ·There is no frame problem caused by atomization or spraying; · the selection range of metal pigment is wide, and the dosage is high; · there is no separation problem between metal pigment and bottom powder; · the color of new powder and recycled powder is basically the same; · the problem of poor electrification of metal pigment is improved, and the powder coating rate is improved; ·The bonding process can improve the agglomeration and dispersion effect of metal pigments and eliminate the color difference caused by the particle size difference; it can reduce the addition of expensive metal pigments and reduce the cost of metal powder coatings.