Dry-Blended metallic powder coating VS Bonded metallic powder coating
Posted by: admin | on August 12, 2012
Metallic and mica powder coating contains metal flake or mica particulate matter that gives these coatings their special appearance. These flakes and particulars are a freestanding component. Metallic powder coating is homogeneously blended with a base color powder and are referred to as Dry-Blended powders. They are available in Epoxy, Hybrid, Urethane, and TGIC Polyester chemistries.
The problems faced with dry-blended powder coating are with color consistency, limited penetration in recessed areas, and their limited ability to be recycled. Dry-blended powder coating are usually applied using a corona gun with a flat spray nozzle. Metallic and mica powder coating are processed by physically bonding them to the surface of the powered coating. Generally, all of the metallic or mica particles are bonded, however some may not be firmly attached and can cause various problems in the finishing process.
Bonded metallic powder coating and mica powder has fewer lines than dry blended powder coating and are more readily recyclable. In addition, they also provide color that is more consistent after recycling and less picture frame effect, as well as a better penetration and higher transfer efficiency. Even though bonded metallic and mica powder can be reclaimed, it is always best to minimize the ration of reclaimed powder to virgin powder so that you will produce the best possible finish. Bonded powder coating is available in Epoxy, Hybrid, Urethane, and TGIC polyester chemistries.