History of the development of ultra high molecular weight polyethylene: ultra-high molecular weight polyethylene pipe in China in 2001 was listed as the Ministry of Science and Technology National Science of the word document (2000) No. 056 focus on promoting national scientific and technological achievements slider polyethylene prices, is chemical new materials and new products. State Planning Commission of Science and Technology ultrahigh molecular weight polyethylene pipe project as a high-tech industry is currently focused on priority development areas. UHMWPE identification methods: Weighing law. Pure ultra high molecular weight polyethylene products made of polyethylene gravity between 0.93-0.95 slider factory, less dense and can float on water. If it is not pure polyethylene material, it will sink to the bottom. Temperature measurements.