灰分指标在PVC-U管材标准中的设立探讨  

Discussion on Establishment of Ash Content Index in PVC-U Pipe Standards

作　　者：何郑钧 肖照华 杨科杰 扈廷勇 He Zhengjun;Xiao Zhaohua;Yang Kejie;Hu Tingyong(Zhejiang Taishi Quality Testing and Research Institute Co.,Ltd.,Zhuji,Zhejiang,311814;Wuzhou Product Quality Inspection Institute,Wuzhou,Guangxi,543002;Zhejiang Fengye Pipe Technology Co.,Ltd.,Zhuji,Zhejiang,311816;Guangxi Wuyi Pipe Industry Co.,Ltd.,Wuzhou,Guangxi,543000)

机构地区：[1]浙江钛石质量检测研究院有限公司,浙江诸暨311814 [2]梧州市产品质量检验所,广西梧州543002 [3]浙江枫叶管业科技股份有限公司,浙江诸暨311816 [4]广西五一管业股份有限公司,广西梧州543000

出　　处：《现代塑料加工应用》2024年第2期40-43,共4页Modern Plastics Processing and Applications

基　　金：广西科技基地和人才专项项目(2020AC26007);2020年梧州高新区、梧州学院产学研项目(2020G006)。

摘　　要：研究了硬聚氯乙烯(PVC-U)管材灰分指标的测定方法及其在产品标准中的应用。结果表明:在相同灼烧条件下,不同种类PVC-U管材用无机填料的失重率各不相同。不能只依据灰分推导PVC-U管材的填充材料用量和力学性能变化。以灰分指标为代用指标缺乏可靠性,灰分限量值设定无法提升产品质量,对产品质量控制产生干扰作用,且GB/T 5836.1—2018《建筑排水用硬聚氯乙烯(PVC-U)管材》现有力学性能指标作为直接性能指标能够满足PVC-U管材的使用性能要求,没有必要增加灰分指标。The determination method of ash content index of unplasticized poly(vinyl chloride)(PVC-U)pipes and its application in product standards were studied.The results show that under the same burning conditions,the weight loss rates of inorganic fillers used in different types of PVC-U pipes vary.The filling material dosage and mechanical property changes of PVC-U pipes cannot be derived solely based on ash content.The use of ash content index as a substitute indicator lacks reliability,and the setting of ash content limit values cannot improve product quality,which interferes with product quality control.Moreover,the existing mechanical property indicators in GB/T 5836.1—2018“Unplasticized poly(vinyl chloride)(PVC-U)pipes for soil and waste discharge inside buildings”can meet the performance requirements of PVC-U pipes as a direct property indicator,and there is no need to increase the ash content index.

关 键 词：硬聚氯乙烯管材 灰分指标 无机填料 力学性能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]