ã€China Aluminum Industry Network】 1. Aluminum powder has a silvery-white metallic luster, so it is commonly called aluminum silver powder or silver powder. Its chemical composition is “aluminum†and not “silverâ€. Applications: powder coatings, inks, plastic masterbatches, printing, imitation gold paper, imitation gold cards, gold films, textiles, but in the use of water-based paint and paint with acid and alkali will be oxidized black. Not recommended for applications requiring acid and alkali combined with rain.
Second, ultra-fine silver powder: 1, ultra-fine floating silver surface area, when exposed to the air, can quickly generate a passive layer of protective film on the surface, that oxidation black, need to do a good sealing measures, floating silver is not Recommended for applications where alkali resistance is required. If required, silver white pearlescent powder may be considered. 2. Batches of silver powder have certain differences and are affected by the process and spray. They need to maintain the stability of the production process. In addition, trial production should be conducted first to avoid increasing losses. 3. Add 1-2% of ultra-fine silver cover, add 0.6%-1.5% of high light wax AW500B can cover the bottom and produce a strong metallic luster. The smaller the amount is, the smaller the amount of blue is. When the amount is insufficient, there are dark spots of black silk, or commonly known as flies, and the overall darkness. 4, floating silver sheet, always floating in the outer layer of the coating, so the performance of hardness and anti-oxidation and blackening is slightly poor, to get better hardness need to add printing and hardener AS501, plus silver powder Hard agent POL16, POL09, etc., can not add high-gloss wax, gold and silver powder arranging agent, polyethylene wax, etc. The longer the mixing time, the better the effect.
Third, floating silver: 1, the smaller the silver particle size, the stronger the sense of the metal, the stronger the hiding power; the amount of too much is easy to produce the phenomenon of spit powder and plug the gun; when the amount is not enough to easily appear black spots, hair or small Stripes. R18, R01 and other special effects of silver dispersant is SIO2 as a carrier of high-performance dispersant, different from the ordinary silver powder dispersant, no matter how much silver powder can be uniformly dispersed without black spots, which can be adjusted by the background color and reduce the amount of silver powder It can modulate the effect of silver powder in the black, blue and different hue. The addition amount is very small and it has a good promoting effect on the leveling. Except adding to the flake, it can not be added directly. The direct addition will produce particles and white spots, R01 effect is better, and no dry particles are directly mixed. 2. The sheet-like structure of the floated aluminum powder will be destroyed (deformed or crushed) during the grinding and extrusion process. As a result, the color is grayed out, so the dry mixing method is generally used.
Fourth, non-floating silver: 1, non-floating silver evenly distributed in the entire coating film in the middle, so it is wrapped in resin, so it has good oxidation resistance and abrasion resistance, better weathering acid and alkali resistance, No fingerprints, surface gloss, and the color can be adjusted from the bottom of the powder, but the amount of addition is greater than the floating silver, the metal effect is not floating silver, white. 2, PCRDIS aluminum powder is particularly suitable for outdoor products, because of inorganic coating, has good water resistance, weather resistance, chemical resistance; Although coated with silicon and other materials, but in the natural exposure of the environment, aluminum powder Under conditions such as light and humidity, chemical and physical changes such as oxidation will occur soon, so that the metal sensation will be weakened, and the coating will be dark gray with gray spots. In order to solve such problems and scratches, it is recommended to use transparent powder covering. 3, the amount of bottom cover to transparent base powder test, flash silver can add more than about 10%; mixing and spraying process directly affect the spraying and covering effect, please note that the uniformity of mixing and spraying, the coarser particle size The better the flicker effect. 4. Since the silver powder particles differ in shape, density, and charge amount from the powder, separation phenomena may be caused and the powder may be affected. Bonding technology is used to bond powder and silver powder, and the powder and effect are greatly improved. 5, aluminum powder can withstand high temperature 600 degrees do not change color.
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