How are flame retardants used in wood?

1. Spraying treatment. Spraying treatment refers to coating or spraying flame retardant or flame retardant coating on the surface of wood resources and related products after molding, isolating heat source, preventing the surface from contacting air and reducing the performance of the combustion system. For the low flame retardant requirements of wood structural materials, as well as ancient building wooden components and other wood building materials not easy to soak treatment. The advantages of shotcrete treatment are less fire control and less influence on the physical and mechanical properties of wood. The flame retardant has good flame retardant, simple process, the disadvantage is that it covers the log texture, the protective layer is damaged, the flame retardant will disappear.
Impregnation treatment, the varieties of flame retardants are water-soluble solvent, can be used impregnation dosing way. Immersion treatment is a kind of flame retardant treatment method that infuses flame retardant solution into wood or wooden wood-based panels under the conditions of atmospheric pressure, vacuum and comprehensive practice. In the analysis method, there are some problems of impregnation treatment for wood structural materials, especially high pressure impregnation method is widely used in production, and the flame retardant effect is good.
Among halogen-free flame retardants, red phosphorus is a good flame retardant, which has the advantages of less addition, high flame retardant efficiency, low smoke, little toxicity and wide use. General red phosphorus in the air is easy to oxidize and absorb water, causing dust, not easy to transport, polymer material solubility is poor. To solve this problem, the microencapsulation method can be used to produce red phosphorus.