Fingerprint-resistant galvanized sheet is a composite coated sheet obtained by performing Anti-fingerprint treatment on the surface of the galvanized sheet. Fingerprint-resistant steel plate is the first material to pass environmental certification. Because the surface will not leave fingerprints when touched with a clean finger, it is named "fingerprint-resistant". The surface of fingerprint-resistant steel plate is smooth and flat with small tolerances. The research and production of fingerprint-resistant boards originated in Japan and entered commercial production in the early 1980s. The original purpose of fingerprint-resistant treatment was to meet the requirements of users in the field of home appliances. In the production process of home appliances, due to process requirements, many parts are touched many times by workers. The sweat stains on the workers' hands will form contamination on the surface of the parts, affecting the fingerprint-resistant galvanized sheet. It is obtained after fingerprint-resistant treatment is performed on the surface of the galvanized sheet. Composite coated panels. Fingerprint-resistant steel plate is the first material to pass environmental certification. Because the surface will not leave fingerprints when touched with a clean finger, it is named "fingerprint-resistant". The surface of fingerprint-resistant steel plate is smooth and flat with small tolerances.
Features：
The initial fingerprint-resistant treatment is to form an inorganic series film, usually a silicate film, on the zinc-plated chromate passivation film, thereby making the steel plate surface fingerprint-resistant. Users have put forward higher requirements for coated products. In addition to fingerprint resistance, they also require grounding, higher fingerprint resistance and coating performance. This resulted in the development of a coated plate that forms a thin-film organic composite film on the complexate film of galvanized steel. The properties of organic and inorganic fingerprint-resistant steel plates are different. The corrosion resistance and grounding properties of organic fingerprint-resistant steel plates are better than those of inorganic fingerprint-resistant steel plates, but the fingerprint resistance index is worse. However, the corrosion resistance of both fingerprint-resistant steel plates can meet the requirements of the home appliance industry.
Type：
One is to apply an organic coating (fingerprint-resistant film) on the passivation film after the galvanized plate has been passivated. The coating method mainly uses roller coating.
The other type is to add organic resin and colloidal silica to the galvanized passivation solution. After the galvanized strip passes through the passivation tank, a composite coating with corrosion resistance and fingerprint resistance is formed on the surface. The main application methods include electrolytic coating and roller coating. At present, the first process is generally used at home and abroad to produce fingerprint-resistant boards.
Traditional fingerprint-resistant boards basically use electro-galvanized sheets as the substrate. With the continuous improvement and development of hot-dip galvanizing technology and processes, the surface quality of hot-dip galvanized sheets has now reached a level comparable to that of electro-galvanized sheets. Hot-dip galvanized sheets are cheap and have better corrosion resistance, so The use of hot-dip galvanized sheets as fingerprint-resistant substrates is gradually becoming mainstream. In addition, in 2007, organic composite coating boards that integrate multiple properties (such as fingerprint resistance, conductivity, self-lubricating properties, paintability, etc.) and can simultaneously meet a variety of usage requirements are undergoing rapid development.
The main use of thin organic-coated steel plates with fingerprint resistance is for internal and external panels of various home appliances. Currently, the largest domestic demand for fingerprint-resistant plates is in the computer case manufacturing industry, with annual consumption estimated to be between 40 and 50 million tons. .
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