Introduction to the characteristics and classification of the paint film of aluminum paste for coatings
In the past two or three years, aluminum paste products have begun to develop in the direction of using fine spherical aluminum powder as raw materials, and major breakthroughs have been made in aluminum paste production technology. Aluminium paste is a kind of pigment, which has undergone special processing technology and surface treatment, so that the surface of the aluminum sheet is smooth and smooth, the edges are neat, the shape is regular, the particle size distribution is concentrated, and the matching with the coating system is excellent. Aluminum paste can be divided into two categories: floating type and non-floating type. During the grinding process, one fatty acid is replaced by another, giving the aluminum paste a completely different character and appearance, with aluminum flakes in the shape of snowflakes, fish scales and silver dollars.
Aluminum paste is mainly divided into two categories, namely floating type and non-floating type.
Floating aluminum paste
In the floating aluminum paste, the aluminum flakes are aligned 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 paste an important functional raw material. Floating aluminum paste is generally mainly used in roof coating, maintenance and commercial application coatings with high protection requirements. The appearance of floating aluminum paste can vary depending on the particle size and can range from a rough, white appearance to a dull, reflective or mirror-like effect. Coarse-grained floating aluminum paste has low hiding power and rough structure, but can obtain white and bright coating. In contrast, fine-grained floating aluminum pastes have great hiding power, smooth structure and highly reflective coating.
Non-floating aluminum paste
The non-floating aluminum paste is evenly distributed in the entire paint film, and the appearance of the formed film is different from the floating aluminum paste. Because it can be mixed with a variety of pigments and is suitable for a variety of systems, it is suitable for industrial coating. Effect. However, the pigments or dyes used with ordinary aluminum pastes and non-floating aluminum pastes must be transparent, and only in this way can the effect of the metal surface be achieved. There are many kinds of non-floating aluminum pastes, the tinting strength is from low to high, the particle size is from coarse to fine, the appearance is from white, shiny to gray, the ordinary silver paste is more delicate, and there are acid-resistant series products to reduce industrial smoke, acid rain, etc. Other adverse environmental effects on coatings.