超市中的熟食大多包裹一层保鲜膜,很多消费者认为这就是层“保护膜”,买回家直接放到冰箱里就行了。事实上,应该把保鲜膜撕掉后再储存。目前,生产食品保鲜膜的原料主要有三种,分别是聚乙烯(简称PE)、聚氯乙烯(PVC)和聚二氯乙烯 Mostly cooked food in the supermarket wrapped in a layer of plastic wrap, many consumers think this is the layer of “protective film” to buy a home directly into the refrigerator on the line. In fact, the plastic wrap should be torn and stored. At present, there are mainly three kinds of raw materials for producing food cling film, namely, polyethylene (referred to as PE), polyvinyl chloride (PVC) and polyvinylidene chloride