Polyester film after a series of technical innovation to improve product processing, can make a line with the film, overall smooth-gap-free polyester films are very popular in the market. A more comprehensive performance of PET film packaging film. Transparent, glossy good air tightness and baoxiang; moisture-proof medium moisture at low temperature drop. Good mechanical properties of PET film, its toughness is the best of all thermoplastics, tensile strength and impact strength than the average film is much higher and quite good, size, suitable for printing, paper bags and other secondary processing. PET film has excellent heat-resistance, cold resistance and excellent chemical resistance and oil resistance. But its not alkaline resistant; with static electricity, there are no appropriate static methods, so in the packaging of powdery goods should be noted.