AKMC’s Powder coating materials are unique among all present-day compliance coatings. They are dry, Solid, essentially 100% film-forming coating materials, as opposed to the liquid materials used in high solids, water-reducible, radiation cure and electro coat technologies.
AKMC’s coatings are, in fact, not paint until the coated item emerges from the curing or fusion oven. Prior to baking, powder coatings are finely pulverized plastic compositions, and consequently most resins used in powder coatings are quite different from those used with liquid paints. Liquid paints require resins soluble or miscible with solvents and/or water, whereas powder coatings require resins that are solid materials. These solid resins must be solid at ambient, and reasonably elevated, storage temperatures, and must be capable of melting sharply to low viscosities to permit flow to a continuous coating film when heated.
AKMC’s powder coatings are available to the industrial finisher in Thermo sets
Like all other industrial surface coatings, powder coatings are individually formulated to meet the industrial user’s very specific finishing needs. This means matching the finisher’s house colors and film performance requirements, all within the particular restrictions of the finisher’s operation. New types with unique properties are constantly being developed. Consequently, as with the selection of any industrial finish, a close relationship must be developed between the user of the coating and the supplier so that these exacting requirements are thoroughly understood, and the correct type of finishing material is supplied.
Thermosetting powder coatings are quite different from thermoplastic powder coatings; they are based on lower molecular weight solid resins. Subjected to elevated temperatures, these coatings melt, flow and chemically crosslink within themselves or with other reactive components to form a higher molecular weight reaction product. The coating has a different chemical structure than the basic resin. The newly formed materials are heat stable and will not soften back to a liquid on further exposure to heat. Powders based on these resin systems can be ground to fine particle sizes, in the range of 25-40 microns. Due to the rheological characteristics of these resin systems, they can produce thin paint-like surface coatings in the 1 to 3 mil (approximately 0.025 to 0.076mm) range with properties equivalent and sometimes superior to the coatings produced by the liquid compliance technologies.