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Aluminum powder supplier
Aluminum matel powder
Introduction of metal aluminum powder
Metal aluminum powder is a large category of metal pigments due to its wide application, large demand, and variety. Metal aluminum powder is a silver metallic pigment, which is made by adding a small amount of lubricant to pure aluminum foil, crushing it into a scaly powder, and then polishing it. The aluminum powder is light in weight, has high floating power, strong hiding power, and has good reflectivity to light and heat. After treatment, it can also become non-floating aluminum powder. Physical and chemical properties and uses Odorless. Silver-white metal powder, spontaneous combustion temperature: 5900℃, lower limit of dust explosion: 40g/m3. Used to make: paints, inks, pigments and fireworks. It can also be used as an additive to porous concrete. Aluminum can also be used as therapeutic and medical supplies, and it is also used in the automotive and aircraft industries.
Production and processing
1. Melt extrusion method:
The method is to heat and extrude the metal pigment and the remaining components of the powder coating (resin, etc.) through a screw extruder. Although metallic pigments can be mixed well with powder coatings, metallic pigments are insufficiently oriented in high-viscosity melts. In addition, in the next pulverization process, the flake structure of the pigment will inevitably be destroyed. The metal powder produced by this method has a grayish metallic effect during construction. Therefore, this method is only used for the production of hammer powder.
2. Dry mixing method:
The method is to add the metal pigment dry powder to the pulverized powder coating and mix it with a mechanical mixer. The advantage of the dry blending method is that the mixing of metallic pigments and powder coatings is not very intense, thereby preventing the deformation of the flake metallic pigments, and the metallic effect will not be affected. In addition, the loose pigment/resin mixture is also very conducive to the orientation of the metallic pigments and improves the glitter effect. The disadvantage of this method is that when automatic spraying equipment is used to process the recovered powder, the separation phenomenon occurs due to the large difference in the shape, density and charge of the metal pigment and resin powder particles.
3. Bonding and fixing method:
In this method, the metal pigment and the powder coating are dry mixed and heated at the same time, so that the temperature just exceeds the softening point of the resin. At this time, the metal pigment can be fixed and bonded to the surface of the adhesive resin powder, thereby preventing the powder from being applied. Separation of metallic pigment and resin powder during recycling after neutralization construction. It is the popular bonding law.
