PP-R管又叫三型聚丙烯管,采用无规共聚聚丙烯经挤出成为管材,注塑成为管件。是欧洲90年代初开发应用的新型塑料管道产品。PP-R是80年代末,采用气相共聚工艺使5%左右PE在PP的分子链中随机地均匀聚合(无规共聚)而成为新一代管道材料。它具有较好的抗冲击性能和长期蠕变性能。 PP-R pipe, also known as three polypropylene pipe, random copolymer polypropylene by extrusion into a pipe, injection molding into the pipe. It is a new type of plastic pipe product developed and applied in Europe in early 90s. In the late 1980's, PP-R was used as a new generation of pipe material by vapor phase copolymerization process to make about 5% PE randomly and uniformly polymerize (random copolymerization) in the molecular chain of PP. It has good impact resistance and long-term creep properties.