Food plastic bags are often used in people's life, but also must be careful when use, some plastic bags but poisonous, not can be used to direct the food.
Let's teach you some methods to identify once!
a, by eye observation non-toxic plastic bags with a white, transparent or slightly transparent, uniform texture;
Toxic plastic bags for the color or is white, but the transparency is poor, the turbidity, tensile plastic surface uneven, with small particles.
2, listening with ears ear with hand shaking plastic bags, a ringing sound show is non-toxic plastic bags;
And sound small, stuffy is poisonous plastic bags.
Three, fingered hand touched with the hand touch surface of plastic packaging bags, very smooth and is non-toxic;
Sticky, hair acerbity, waxy feeling is toxic.
Four, nose to smell nose to smell is tasteless non-toxic plastic bags;
Have to stimulate abnormal smell or taste is toxic.
Five, submerged test submerged test put plastic bags in the water, with the hand to press it to the bottom, just a moment, the surface is non-toxic plastic packaging bags, sink in the bottom is toxic plastic bags.
Six, combustion method fire test non-toxic plastic bags of flammable, yellow flame tip, local in cyan, burning like a candle tears dripping, the smell of paraffin;
Toxic plastic bag won't burn, away from the fire that is quenched, flame cutting-edge yellow, green, at the bottom of the softening can drawing.