PU coating refers to the process of covering polyurethane material on the surface of other substrates to form a protective layer. This film can improve the wear resistance, chemical resistance and weather resistance of the substrate, but also has waterproof, anti-scratch and anti-pollution functions, and has a wide range of applications in many fields.
The main raw material of PU coating polyurethane is a chemical synthetic polymer material, which is prepared by polymerization of a variety of monomers. Because of its excellent physical properties and chemical stability, polyurethane is widely used in the production of various materials. After the preparation of polyurethane, it can be covered on other substrates by coating or impregnation methods to form a PU coating film.
In the preparation process of PU coating, the polyurethane needs to be prepared into a liquid or slurry, and then it is coated on the substrate, and through curing and drying processes, so that PU forms a tough protective film. The thickness of the PU coating can be adjusted according to needs, usually between 5-50 microns. PU coating can be applied to a variety of substrates, such as paper, textiles, plastics, metals and so on.
One of the main advantages of PU coating is its excellent wear resistance. PU coating can effectively protect the substrate from friction and scratch damage, so that the substrate has a longer service life. Especially in high-wear environments, such as floors, furniture, automotive interiors and other occasions, PU coating can effectively extend the service life of the material.
In addition, PU coating also has excellent chemical resistance. Polyurethane itself has good acid and alkali resistance, and can effectively protect the substrate from acid and alkali attack after the film is coated. This makes PU coating in chemical equipment, chemical laboratories and other fields have a wide range of applications.
PU film also has waterproof properties. Polyurethane has good waterproof performance, after coating on the substrate can form a dense waterproof layer, effectively prevent water penetration. This makes PU coating widely used in construction, underground facilities and outdoor products to provide waterproof protection.
In addition, PU coating also has the characteristics of anti-pollution and easy cleaning. PU coated surface is smooth and flat, not easy to adhere to dust, oil and other impurities, making the surface easy to clean. This makes PU coating widely used in food packaging, household goods and medical equipment and other fields, to keep the product clean and hygienic.
In summary, PU coating, as a functional coating material, is widely used in various fields. It can improve the wear resistance, chemical resistance and weather resistance of the substrate, and also has waterproof, anti-scratch and anti-pollution functions. With the continuous progress of technology and the increase of application demand, the application prospect of PU laminating film will be broader.
