Aluminum powder for pigment
Pigment aluminum powder is deeply loved by designers for its unique beautiful decoration, anti-corrosion and metallic flashing effect. After more than a hundred years of development, its application range is becoming wider and wider. The main application areas are industrial coatings. , Automotive coatings, plastic processing and printing inks, etc. Among them, the application field that promotes the development of aluminum powder pigments is the coating industry, especially automotive coatings.
The aluminum powder used for pigments refers to "aluminum powder with scaly particles, surface-coated with a treatment agent, and suitable for pigments." There are currently two main methods for preparing flake aluminum powder for pigments: dry production and wet production. Dry production is to use atomized aluminum powder and surface treatment agent to directly ball mill in an inert gas to obtain aluminum powder. In wet production, kerosene or solvent gasoline is used as a protective agent to add a coating agent, dispersant, brightener, anti-settling agent and other additives to ball mill the atomized aluminum powder into a specific scaly particle structure. It is safe to consider industrial wet Law is in the majority.
There are two main forms of aluminum pigments. One is slurry type: aluminum powder slurry is a mixture of pigment aluminum powder and solvent. Its use and characteristics are roughly the same as those of pigment aluminum powder. Because it is easy to use, the output is low. The amount is larger. According to different solvents, it can be divided into solvent-based aluminum-silver paste and water-based aluminum-silver paste. Solvent-based silver paste technology is mature, but high VOC emissions are not environmentally friendly; water-based aluminum-silver paste meets current environmental protection requirements, but technological development Immature, the current application cost is relatively large, but it is in line with the current green development needs, and the future prospects are promising; one is powdered: the powdered application form is generally due to the downstream need for "dry" use, such as application Powder coatings and plastic masterbatches, etc., but due to the nature of aluminum, it is easy to produce a large amount of dust during the grinding process and cause explosions, which are dangerous goods, so be careful in the handling process.
Several major application areas of aluminum powder pigments

Pigment aluminum powder is deeply loved by designers for its unique beautiful decoration, anti-corrosion and metallic flashing effect. After more than a hundred years of development, its application range is becoming wider and wider. The main application areas are industrial coatings. , Automotive coatings, plastic processing and printing inks, etc. Among them, the application field that promotes the development of aluminum powder pigments is the coating industry, especially automotive coatings.
1. Industrial coatings The industrial coatings market includes can coatings, coil coatings, general industrial coatings, marine coatings, powder coatings, anti-corrosion coatings and roof coatings. Among them, the three main aluminum powder coatings are roof coatings, protective coatings and decorative coatings. The end uses of these three types of coatings are closely related to the various characteristics of aluminum powder pigments. For example, roof coatings use the optical properties of pigmented aluminum powder, strong ability to reflect ultraviolet and infrared rays, and anti-corrosion properties, which can extend the service life of the coating. These types of coatings mostly use floating aluminum powder. Protective coatings use pigmented aluminum powder. The shielding effect caused by the shape structure, this type of aluminum powder can be used, or non-floating aluminum powder can be used. Decorative coatings use various light effects produced by the "floppy" effect of pigmented aluminum powder to achieve decoration. For the purpose of this type of coating, non-floating aluminum powder is mostly used.
2. Automotive coatings Aluminum powder pigments can be used in online coating coatings for new cars, and can also be used in automotive refinishing paints. Generally, acid-resistant aluminum powder is used to withstand atmospheric pollution, acid rain and sulfur dioxide. In recent years, the development trend of automotive coatings is to study the "flop" effect coatings with bright front view and dark side view. This effect can be achieved by changing the shape of aluminum powder pigments and strictly controlling the particle size distribution of aluminum powder pigments.
3. Printing inks Printing inks are used in a series of substrates ranging from paper to plastic, fiber, glass and metal. Many aluminum powder pigments are used in gravure printing and photorelief printing, offset printing and screen printing. Flake aluminum powder has the characteristics of easy calculation, easy dispersion, and no irritating odor. It can be evenly distributed in organic coatings. It can also be used in printing inks to produce high-quality printing inks with uniform colors.
4. In the plastics processing industry in recent decades, the proportion of using plastics as structural materials has increased significantly, and the use of aluminum powder pigments in plastic products has also increased significantly. It has almost penetrated from auto parts to construction industry, household appliances, and toilet products. , Packaging materials, leisure products and other fields. Pigment aluminum powder can make plastic products and plastic processed products have a bright metallic effect.