All know that according to different shrink film,shrink machine' price is different,how to distinguish between the PVC plastic film and PE film, when purchase of PVC plastic film,we have no way to know which is PVC, which is PE. Ausense introduces some simple methods.
  A, Touch method   Touch has a sense of lubrication, the surface coated with a layer of wax (like a chemical called wax sense), this is a polyethylene film of non-toxic, and polyvinyl chloride film feels some sticky.
  B, Jitter method   Sound crisp, matter easily floating is polyethylene film. And the hand shake and a deep voice is PVC film.
  C, Combustion method   In case of fire, flammable, the flame is yellow, burning with paraffin oil dripping, and gas burning candles, is non-toxic polyethylene film. If it is not easy to burn, from the fire is extinguished, the flame was green, for PVC film.
  D, Immersion method   The plastic film is immersed in water, pressing into the water, can be surfaced to sink to the bottom of the polyethylene, PVC (PE less dense than water, polyvinyl chloride density greater than water; room temperature was about 0.92g/cm3 and 1.4g/cm3).
  Desirable also wire, burning red, in the fire and then, copper wire and experiment with plastic film contact, chemical changes, then dip the plastic component of the wire back to the flame. At this time should be carefully observed, if there are colorful, dazzling green flame, then the plastic materials containing chlorine in PVC material, belonging to the class.