good performance powder coating

Powder coatings are 100% solid powder coating without solvent. The utility model has the advantages of no solvent, no pollution, saving energy and resources, reducing the labor intensity and the mechanical strength of the coating film. It has two major categories: powder coatings (PE) and thermosetting powder coatings. Coating by special resin, pigment and filler, curing agent 

and other additives, are mixed in a certain proportion through hot extrusion, and crushing and screening process for preparation. They at normal temperature storage stability, by electrostatic spraying, friction spraying (thermoset) method, fluidized bed or dip coating (thermoplastic), re heating melting and solidification, forming a smooth bright permanent coating, achieve purpose of decoration and corrosion. The melt viscosity of powder coating is low, and the film has good leveling property, and no side product is produced during the curing reaction, and the appearance of the coating film is good, and it is not easy to produce the defects such as film hole and crater. Because the epoxy resin molecules have hydroxyl group, the adhesion of metal and other substrates is good, generally do not need a primer.

High hardness and scratch resistance of powder coatings. Use made of resin and polyester 

resin powder coating, coating gloss, but activity than that of TGIC slow, low activity, curing time long and long-term high temperature baking is easy to turn yellow; due to presence molecular unsaturated carbonyl may also have certain influence on the corrosion resistance. If will be restored to the hydroxyl groups in the molecular structure of carbonyl hydrogenation, epoxidation, it can not only increase the durability and central molecular oxygen radical content will be greatly increased, cured product will have better mechanical strength, such as the production of powder coating ideal outdoor epoxy resin. Part of the resin curing reaction gel particles in the melt mixing process, the particles will form a coating on the particles. In the construction of electrostatic spraying, the problem of environmental dust should be paid enough attention. Dust from the air, peeling off the operating personnel work tape bag recycling equipment on the fiber and curingequipment, the dust in electrostatic powder spraying process will cause film pollution and particles.