The way the paint is filmed!

Usually, the coating is a fluid liquid at the beginning, after the coating is completed to form a coating film to play a decorative and protective role, the main film forming methods have the following:
1.Volatile filmization of solvents or dispersed media
which is a form that solvent-based or dispersed liquid coatings must go through during film-forming. Liquid coatings form a "wet film" on the coated object. The solvent or dispersion medium contained in it evaporates into the atmosphere, and the viscosity of the coating film gradually increases to a certain extent to form a solid coating film

. If the film-forming substance is a non-convertive film-forming substance, this time the coating completes the entire film-forming process. The drying speed and drying degree of the coating film are directly related to the volatilization ability of the solvent or dispersed medium. It is also related to the degree of diffusion of solvents in the coating film and the chemical structure, molecular weight and glassy temperature of the film-forming substance. It is also related to the environmental conditions and thickness of the coating film when it is formed. In modern coating varieties, cellulose nitrate paint, perchloroethylene paint, asphalt paint, thermoplastic vinyl paint, thermoplastic acrylic paint and rubber paint are all filmed in solvent volatile mode.
2.Polymer particles condense into a membrane
This form of film-forming is the coating relies on the polymer particles as film-forming material to condense with each other under certain conditions and become a continuous solid-state coating film, which is the main film-forming method of dispersed coatings. Dispersed coatings containing volatile dispersion media such as latex coatings, non-water dispersion coatings and organic sols, which produce the proximity, contact and extrusion of highly dispersed particles at the same time as dispersing media volatility, such as real stone paint and latex paint, belong to this form of film-forming. Its film is affected by ambient temperature and humidity.
3. Chemical film-forming
The process by which a coating is applied on the surface of the substrate, and under warmth or other conditions, a reaction occurs between molecules that further increases or cross-links the polymer molecular weight to form a tough coating film.
Such as the common aliclicic acid rust-proof paint contains dry oil and alicic acid resin through the role of oxygen film, PU paint containing hydroxy alcoholic acid or acrylic resin and polycyanate occurred cross-linked reaction into a film. The volatile process of solvents is generally also included before or at the same time as a chemical reaction occurs.
for the external wall water-based architectural coatings, film-forming method belongs to the second, film-forming process by the ambient temperature and humidity of the impact of large, good film-forming can have a good film coating performance. Therefore, in humidity above 85%, the temperature below 5 degrees should stop construction.