Coating industry:

Problem:

After the construction of powder coating film are peel brush marks, corrugated, shrinkage and other irregular shape. Affect the surface of the decorative and beautiful, how to solve the problem from the adjustment formula.

Answer:

Taking into account the storage stability of the powder coating, the use of resin glass temperature, high softening point, high melting viscosity of the resin, so that the high melting viscosity of powder coatings, film leveling is not good, there is a choice of pigment and filler oil absorption is higher, so that the powder coating melt viscosity increased, film leveling is not good. Specific solutions are:

(1)    select the low melt viscosity of polyester resin, the epoxy resin to choose a little lower softening point varieties.

(2)    Select the appropriate amount of pigment, try not to use too much, especially the large amount of oil absorption of organic pigments and carbon black, etc..

(3)    Select a small amount of oil absorption filler, is conducive to the improvement of film leveling, barium sulfate effect is better than calcium carbonate.

(4)    Appropriate increase in the amount of leveling agent, or add hydrogenated castor oil, polyethylene wax, such as low melting viscosity of the solid compound additives to reduce the melt viscosity of the powder coating, good for the film flow. However, the amount of added powder affects the storage stability of powder coating, but also affects the appearance and gloss of the film.

If you encounter problems in powder coating production process, welcomes the detailed questions sent to sales@sinogracechem.com, or call 0551-63459511, powder Institute will organize industry experts as soon as possible to answer your questions, and questions and answers and more practitioners to share.