Whether hard and soft polyurethane foam, have a great fire hazard polyurethane coated, and once the fire will spread rapidly, fiery intensity, produce large amounts of toxic fumes, and easily form a three-dimensional combustion polyurethane encapsulated quotes, seriously affecting the evacuees Firefighters extinguishing and rescue operations. Initially, consider self-extinguishing and oxygen index for evaluating the degree of difficulty of the combustion of materials index polyurethane encapsulated rollers, but also must take into account the diffusion of the flame propagation speed after ignition index, size and toxicity of smoke, the current through each production companies and research institutions of scientific research for many years, 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. The best formula green polyester flame retardant PU is: 100 parts of a polyester polyol polyurethane rubber roller bag manufacturers, 0.18 parts of an organic tin isocyanate index of 1.05. 2.5% of the total phosphorus in the flame retardant material quality, a temperature of 25 ° C, 18 parts of the blowing agent. Average burning time green polyester flame retardant PU greatly shortened 8S reached the standard B1 class flame retardant materials. Decomposition products at high temperatures in the polymer surface forms a protective film, from the PU to prevent burning effect. Polyurethane encapsulated plant, Tsinghua plastic (certified), polyurethane plastic bag 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.