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塑料袋是用塑料薄膜制成的,用它盛装食品或其他日用品,非常方便。塑料袋主要有两种,一种是无毒的,它们是用聚乙烯,聚丙烯和密胺等原料制成的,可以用来装食品;另一种是有毒的,它们是由聚氯乙烯做成的,这只能作一般包装使用,如用其包装食物就有中毒的危险。如何辨别这两种塑料袋呢-[1]把塑料袋放在水里,并用手将其按到水底,稍等片刻,浮出水面的即为无毒塑料袋,沉在水底的即为有毒塑料袋。
Plastic bags are made of plastic film, use it to dress food or other daily necessities, very convenient. Plastic bags are mainly two kinds, one is non-toxic, they are made of polyethylene, polypropylene and melamine and other raw materials, can be used to hold food; the other is toxic, they are made of polyvinyl chloride Made, this can only be used for general packaging, such as the risk of poisoning with its packaging food. How to distinguish between these two kinds of plastic bags do? [1] The plastic bag on the water, and hand pressed to the bottom, wait for a moment, surface is non-toxic plastic bags, sinking in the bottom is toxic Plastic bags.