Polyurethane foam boards should adopt the practice of thin plaster, thin plaster craft is on the outer surface of the insulation material applied 3 to 5 mm of plaster mortar, a wall thickness which can guarantee water vapor permeable polyurethane composite board manufacturers out , but also to meet the requirements of impermeability system. Paste using point frame method, leave 50mm ventilation holes paste process, so that the wall of water vapor generated by seven holes successfully excluded from the protective layer. Whether hard and soft polyurethane foam polyurethane mesh sieve, have a great fire hazard composite polyurethane panels, and once the fire will spread rapidly, fiery intensity, produce large amounts of toxic fumes Supply composite polyurethane panels, and easily form a three-dimensional combustion , seriously affecting people's evacuation and rescue firefighters extinguishing action. Initially, consider self-extinguishing and oxygen index for evaluating the degree of difficulty of the combustion of materials index, but must also take into account the diffusion of the flame propagation speed after ignition index, size and toxicity of smoke, the current through the production enterprises and research institutions years of research studies have been found to make the original flammable polyurethane foam to achieve high oxygen index, flame spread of small, smoke, toxicity, flame resistance, flame retardant technology through strong line. Polyurethane composite board manufacturers, Tsinghua plastic (certified), composite polyurethane panels provided by the Engineering Plastics Co. ShangYinXian Tsinghua. ShangYinXian Qinghua Plastics Co., Ltd. (www.tyxqhgc.com) is Anyang, other leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Tsinghua engineering leadership with the staff warmly welcome all inquiries negotiations to create a better future Tsinghua engineering.