What is the composition of glass fiber reinforced polyurethane?

Glass fiber reinforced polyurethane composite is formed by pultrusion process with non-woven glass fiber yarn as reinforcing material and polyurethane resin as matrix material. As glass fiber is an inorganic nonmetallic fiber, it has good flame retardancy and heat resistance, and its conventional melting point is above 1000℃. Polyurethane is a thermosetting material, which will form a carbonized layer on the surface after encountering fire to prevent the flame from penetrating, and will not melt or produce droplets. Therefore, the glass fiber reinforced polyurethane composite is difficult to burn in the case of fire, and the high temperature of the fire surface is also difficult to conduct to the other side. High flame retardancy greatly improves the function of glass fiber reinforced polyurethane composite profiles to protect users' lives and property.