Identification of toxic food packaging bags have no toxicity can be identified by the following simple methods:

1. Water detection method: put plastic bags into the water, non-toxic plastic bags into the water, can surface; Toxic plastic bags do not float up.

2. Touch detection method: touch the plastic bag with your hand, it is non-toxic if it has a sense of lubrication; Otherwise toxic.

3. Jitter detection method: Hold one end of the plastic bag by hand and pat it hard. The clear sound is non-toxic; The opposite is toxic.

4. Fire detection method: plastic bags can be cut to a side, with fire, toxic is not easy to burn; Non-toxic ones burn easily when exposed to fire.

Proper selection of food packaging bags To choose and use qualified food plastic packaging bags, should pay attention to the following points:

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1. Food plastic bags are odorless and odorless when they leave the factory. Plastic bags with special smells can not be used for food packaging.

2. Colored plastic bags (dark red or black used in the current market) should not be used for food packaging. Because such plastic bags are often made from recycled plastic.

3. Try not to use coated, coated materials. In modern packaging design, in order to make the packaging more beautiful, corrosion resistance, a large number of materials with coating. This not only brings difficulties to the recycling and reuse of materials after scrap products, but also most of the paint itself is toxic. If people eat these packaged food, it will cause great harm to people's body. In addition, the process of coating and plating also brings great pollution to the environment. Such as paint volatile toxic solvent gas, electroplating produced chromium and other heavy metal waste liquid, waste residue pollution. Therefore, should choose as far as possible without coating, coating packaging materials.

4. Choose food from shopping malls rather than street vendors.

5. Due to the characteristics of food plastic bags not easy to degrade, will cause environmental pollution, so, when purchasing food, choose green packaging materials. Paper is a widely used green packaging material at present. Therefore, when buying food, choose the original paper packaging is appropriate, biodegradable plastic can also.