The difference between PE plastic film and PVC plastic film1

How to distinguish between PE plastic film and PVC plastic film? When we buy PVC plastic film, we often encounter the situation of buying PE plastic film, but we have no way to know which is PVC and which is PE. Here are a few ways to introduce you, very simple. 1. The touch method has a lubricating feeling to the touch, and the surface seems to be coated with a layer of wax (chemically called wax feeling). This is a non-toxic polyethylene film bag, while the polyvinyl chloride film is a little sticky to the touch. Second, the shaking method shakes by hand, the sound is brittle, and the quality is easy to float is the polyethylene film bag. And the low-pitched sound of shaking hands is the polyvinyl chloride film. 3. Combustion method It is flammable in case of fire, the flame is yellow, paraffin-like oil drips when burning, and there is gas when the candle burns. It is a non-toxic polyethylene film bag. If it is not easy to burn, it will be extinguished after leaving the fire, the flame is green, and it is a polyvinyl chloride film bag. 4. Immersion method Immerse the plastic bag in water. After pressing it into the water by hand, the polyethylene that can surface is polyethylene, and the one that sinks to the bottom is polyvinyl chloride (the density of polyethylene is less than that of water, and the density of polyvinyl chloride is greater than that of water; normal temperature are about 0.92g/cm3 and 1.4g/cm3 respectively). It is also possible to take a copper wire and burn it to red in the fire. Then, contact the copper wire with the plastic film used for the test to produce chemical changes, and then put the copper wire dipped in the plastic component back into the flame. At this time, you need to observe carefully. If there is a colorful and dazzling green flame, it means that this plastic material contains chlorine and belongs to the PVC material.