慎重选用塑料袋市场上常见的塑料袋有两种：一种是聚氯乙烯为原料制成的，另一种是聚乙烯制成的。这两种塑料的性质完全不一样，一般工业、农业应用的塑料袋，大多是由聚氯乙烯等有毒塑料制成的，如果用它来包装食物，就有中毒的危险。而用聚乙烯原料制成的食品袋则是无毒... Careful selection of plastic bags Common plastic bags on the market there are two: one is made of polyvinyl chloride as raw materials, and the other is made of polyethylene. The properties of these two kinds of plastics are totally different. The plastic bags used in general industrial and agricultural applications are mostly made of toxic plastics such as polyvinyl chloride. If they are used to pack food, they are at risk of poisoning. The polyethylene bags made of raw materials is non-toxic ...