论文部分内容阅读
PP-R管材是目前产量最大的建筑冷热水管,有性能好、价格适中、卫生、无污染、安装方便可靠等优点;但是也有热变形大,膨胀系数大等明显缺点。国内一些PP-R管道主要生产企业多年来为克服这些缺陷,相继推出PP-R/AL,如PP-R塑铝稳态复合管、双热熔型PP-R塑铝复合管,F-PPR(三层共挤PP-R稳态复合管)等新型聚丙烯复合管道,这些管道不仅克服了PP-R管道热变形大,膨胀系数大等缺陷,还提高了管道系统的承载能力。
PP-R pipe is currently the largest production of hot and cold water pipes, with good performance, affordable, hygienic, non-polluting, easy installation and reliable advantages; but there are large thermal deformation, expansion coefficient obvious shortcomings. Over the years, some major domestic PP-R pipe manufacturers have introduced PP-R / AL such as PP-R aluminum-plastic composite pipe, double hot melt PP-R plastic aluminum composite pipe, F-PPR (Three-layer co-extruded PP-R steady-state composite pipe) and other new polypropylene composite pipe, these pipes not only overcome the PP-R pipe thermal deformation, expansion coefficient and other shortcomings, but also improve the carrying capacity of the pipeline system.