Industry information

How to distinguish nontoxic and toxic plastic film? The most commonly used identification methods are sensory inspection, combustion and water immersion.

Sensory inspection: polyethylene and polypropylene than polyvinyl chloride film transparency is good, there is a layer of waxy luster on the surface, hand touch is a feeling of lubrication, and polyvinyl chloride is milky white, poor transparency, sticky feeling, dark color and luster, the feeling is not good.

Combustion identification method: polyethylene, easy to ignite, the flame is divided into two colors, the top of the yellow, the bottom of the flame is blue, waxy taste, smoke free, leave open fire can continue to burn; Polypropylene and polyethylene are different, only a small amount of black smoke, oil smell. And toxic polyvinyl chloride is difficult to ignite, the flame is also divided into two colors, the upper part is yellow, the lower part is green, the flame is splatter, smoke white, have pungent spicy taste, leave open fire is extinguished. Because polyvinyl chloride film is poisonous, also should not burn down in the kitchen, lest cause air pollution.

Water is immersed differentiate a method: this law already simple practical, dip plastic bag into water, press with the hand into water, let go of those who sink in water, it is toxic commonly, can float on the surface of the water, it is avirulent commonly.