Food suction bags are often used in people‘s daily life, but we must be careful when using them. Some food suction bags are toxic and cannot be used to directly contain food. Next, the custom manufacturers of food roll film, suction nozzle bag and food packaging bag will introduce the selection skills of food suction nozzle bag.

1、 Eye observation

Non toxic plastic bags are white, bright or slightly bright, with uniform texture; The toxic plastic bag is colorful or white, but the clarity is poor and dirty. The plastic surface is stretched unevenly and has small particles.

2、 Listen with your ears

When shaking the plastic bag with your hand, announce that it is a non-toxic plastic bag with a crisp sound; And the sound is small and stuffy toxic plastic bags.

3、 Touch with your hand

Touch the surface of the food suction bag with your hand, which is very lubricating and non-toxic; Sticky, astringent and waxy are poisonous.

4、 Smell with your nose

Non toxic food suction bag is tasteless; It is poisonous to have abnormal smell or taste.

5、 Submerged test method

Put the plastic bag into the water, press it to the bottom by hand, wait a moment, the non-toxic food suction bag will emerge from the water, and the toxic food suction bag will sink to the bottom.

6、 Incineration method

The non-toxic plastic bag is flammable. The flame is yellow at the top and cyan in some parts. It drips like candle tears when burning, with white preserved meat; Toxic plastic bags are not easy to burn. They are extinguished immediately after leaving the fire. The flame is yellow or black at the top and green at the bottom. It can be softened, brushed and smelled a pungent smell.