The invention relates to a light
flame-retardant
thermal insulation board and a manufacturing method thereof, and belongs to the technical field of composite materials and novel chemical building materials. The insulation board is composed of a core layer, a middle layer and a shell layer; the core layer, the middle layer and the shell layer are independently extruded by three extruders to form acore layer
material flow, a middle layer
material flow and a shell layer
material flow respectively; the core-layer material flow, the middle-layer material flow and the shell-layer material flow converge in the mouth mold, the core-layer material flow is located at the innermost part, the middle-layer material flow wraps the periphery of the core-layer material flow, the shell-layer material flowwraps the periphery of the middle-layer material flow to form a mixed material flow, and the mixed material flow is extruded in the mouth mold to obtain the light
flame-retardant thermal-insulation board. The invention is convenient to produce and manufacture, high in production continuity and high in production efficiency; the insulation board is small in density, light in weight,
flame-retardant, good in heat preservation effect, waterproof,
corrosion-resistant, mothproof, free of
cracking, aging and deformation, free of
color difference, free of paint falling in the using process, free ofmoisture absorption and
moisture regaining and the like.