论文部分内容阅读
新化读者王一民来信询问:怎样识别聚氯乙烯和聚乙烯等塑料制品? 答:一般来说,在日常生活中使用聚氯乙烯(有毒)类材料所占比重要大大高于聚乙烯(无毒)类材料。凭肉眼是难以区分这两类材料的。简单易行的识别方法是:首先,取铜丝一根,在
Xinhua reader Wang Yimin asked in a letter: How to identify plastic products such as PVC and polyethylene? A: In general, the proportion of PVC (toxic) materials used in daily life is significantly higher than that of polyethylene (non-toxic ) Class material. With the naked eye is difficult to distinguish between these two types of materials. Easy to identify the method is: First, take a copper wire, in