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Wenzhou Dajiang Vacuum Packing Machinery Co., Ltd.
19
2023
-
07
Accurate identification method for food plastic packaging bags
Author:
Food plastic packaging bags are commonly used in people's daily lives, but they must also be used with caution. Some plastic packaging bags are toxic and cannot be used to directly hold food.
1、 Eye observation method
Non toxic plastic bags are white, transparent or slightly transparent, with a uniform texture; Toxic plastic bags are colored or, although white, have poor transparency and turbidity, with uneven stretching of the plastic surface and small particles.
2、 Listen with your ears
When shaking the plastic bag vigorously with your hand, a clear and crisp sound indicates that it is a non-toxic plastic bag; And the one with a low and muffled sound is the toxic plastic bag.
3、 Touch with your hand
Touch the surface of the plastic packaging bag with your hand, it is very smooth and non-toxic; Sticky, astringent, and waxy are toxic.
4、 Smell with your nose
Non toxic plastic packaging bags are odorless; It is toxic to have an irritating odor or an abnormal taste.
5、 Immersion test method
Put the plastic bag into the water, press it down to the bottom with your hand, and wait for a moment. The one that emerges from the water is a non-toxic plastic packaging bag, while the one that sinks to the bottom is a toxic plastic packaging bag.
6、 Combustion method
Non toxic plastic bags are flammable, with a yellow flame tip and a local cyan color. When burned, they drip like candle tears and have a smell of paraffin; Toxic plastic bags are not easy to burn and extinguish when left on fire. The flame tip is yellow or black, and the bottom is green. They soften and can be brushed, and a pungent odor can be smelled.
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