Among them, PVC plastic is toxic; PVC resin is non-toxic, but plasticizer dibutyl phthalate or dioctyl phthalate is added in the process of making plastic, so the food packaging bags produced are toxic.

另外，有些塑料袋制品中加入了穩定劑，而這些添加的穩定劑主要是硬脂酸鉛，這樣生產出來的食品包裝袋是有毒性，這種鉛鹽極易析出，一旦進入人體就會造成集蓄性鉛中毒，所以裝食品時要用專用的食品袋，絕不可亂用。特別是下類情況生產的食品包裝袋更要分清楚。

In addition, some plastic bag products are added with stabilizers, and the stabilizer is mainly lead stearate. The food packaging bags produced in this way are toxic. This kind of lead salt is easy to separate out. Once it enters the human body, it will cause accumulated lead poisoning. Therefore, special food bags should be used when food is packed, and it is not allowed to use them indiscriminately. In particular, the food packaging bags produced under the following circumstances should be clearly distinguished.

1、聚氯乙烯制品與乙醇乙醚等溶劑接觸會析出鉛，所以用聚氯乙烯塑料制品存放含酒精類食品是很不合適的；

1. PVC products will precipitate lead when contacting with solvents such as ethanol and ether, so it is not suitable to store alcoholic food with PVC plastic products;

2、聚氯乙烯遇含油食品時其中鉛就會溶入食品，所以很不適宜包裝含油食品。

2. When PVC meets oily food, lead will dissolve into food, so it is not suitable for packaging oily food.

3、聚氯乙烯塑料使用溫度高于50℃時就會有HC緩慢析出，這種氣體對人體健康有害。

3. When the temperature of PVC plastics is higher than 50 ℃, HC will be released slowly, which is harmful to human health.

4、廢舊塑料回收再制品，因原料來源復雜難免帶有有毒成分，也不可作食品包裝袋的制作原料。

4. Waste plastic recycling products, due to the complex sources of raw materials, inevitably contain toxic components, and can not be used as raw materials for food packaging bags.