Introduction to the application of aluminum silver paste in coating industry
Aluminum silver paste is an indispensable metal pigment. Its main components are snow flake aluminum particles and petroleum solvent, in paste form. It is characterized by special processing technology and surface treatment, so that the surface of the aluminum sheet is smooth and smooth, the edge is neat, the shape is regular, the particle size distribution is concentrated, and the paint system is well matched, has excellent light reflection ability and metal luster, and is mixed with transparent color pigments, the paint film has obvious "different color effect with the Angle", the decorative effect is very gorgeous and beautiful. Aluminum silver paste is mainly used in automotive coatings, weak current plastic coatings, metal industrial coatings, Marine coatings, heat-resistant coatings, coil coatings and so on.
Aluminum silver paste can be divided into two categories: floating type and non-floating type. In the floating aluminum-silver paste, the aluminum sheet is oriented near the surface of the paint film to form an opaque silver film. This opaque property is the main factor that makes the floating aluminum-silver paste an important functional raw material. Floating aluminum silver paste is mainly used in roof coating, maintenance and commercial application coatings with high protection requirements. The appearance of the floating aluminum silver paste can vary according to the thickness of the particle and can range from a rough, white appearance to a dull, highly reflective or mirror-like effect. The coarse-grade floating aluminum silver paste has the lowest hiding power and rougher structure, but can obtain the whitest and brightest coating. In contrast, the fine grade float type aluminum silver paste has the greatest covering power, the smoothest structure and a highly reflective coating.
The non-floating aluminum silver paste is distributed uniformly and parallel throughout the paint film, and the appearance of the film formed is different from that of the floating aluminum silver paste. Because it can be mixed with various pigments and is suitable for various systems, it has a unique effect on industrial painting. However, any pigments or dyes used with non-floating aluminum silver paste must be transparent in order to achieve that realistic metal surface effect. There are many kinds of non-floating aluminum silver paste, the coloring power is from low to high, the particle size is from coarse to fine, the appearance is from white, shiny to gray, more delicate, and acid resistant products, reduce the impact of industrial smoke, acid rain and other adverse environment on the coating.
Aluminum silver paste is not easy to fire and explosion, covering power, brightness, triggering performance, metal performance, smoothness is the technical requirements for identifying aluminum silver paste, aluminum silver paste model is classified according to the size of the particle size. Widely used in plastic paint, hardware home appliance paint, motorcycle paint, bicycle paint, etc. According to the chemical dangerous goods list. However, due to the international and domestic requirements for environmental protection and safety of chemical products in recent years, domestic manufacturers have changed the process, no longer use secondary flammable solvents as carriers, and choose safety and environmental protection solvents with higher flash points. The aluminum silver pulp produced now does not belong to the scope of dangerous goods in terms of actual chemical characteristics.