Nowadays, food bags are indispensable in daily life. Although there are environmental protection bags being promoted nowadays, plastic bags are widely used, especially for food packaging bags, which should attract our attention. At present, comparatively high-grade food bags on the market belong to self-supporting bags. Plastic bags are usually made of two types of plastic film: polypropylene, polyethylene and ammonia, and polyvinyl chloride. The former is non-toxic; the latter is toxic and cannot pack food.

What methods can be used to distinguish whether food bags are poisonous or not?

Vibration test: Hold one end of the food bag with your hand, mix it vigorously, declare that the person with clear and crisp voice is non-toxic; otherwise, it is toxic.

Hand Touch Test: Contact food bags with your hands. If you have a smooth feeling, it will be non-toxic; otherwise it will be toxic.

Fire inspection method: can cut the side of food bags, burn with fire, toxic is not easy to burn; non-toxic in case of fire simple burning.

Water Inspection Method: Food bags are put into water, after non-toxic food bags are put into water, they can float out of the water, while toxic food bags are not floating up.