PET film is a more comprehensive performance packaging films. Its transparency, gloss; good tightness and Paul fragrance; moderate moisture, water vapor transmission rate decrease at low temperatures. PET film of excellent mechanical properties, their strength and toughness is the best of all thermoplastics, much higher tensile strength and impact strength than the average film; and very good strength, dimensional stability, suitable for printing, paper and other secondary processing . PET film also has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. But its impatience alkali; easy method with static electricity, there is no proper anti-static, so attention should be on the packaging of powdered materials. With the development of special function films, new uses polyester films are also emerging. It can produce as mobile phone LCD protection film, protective film LCD TV, mobile phone keypad. PET protection film for mobile phones, compared with other plastic packaging has many excellent properties: excellent gas barrier, wet, poise and other high barrier resistance, good chemical stability; with other plastics that fall high toughness properties, tensile strength, impact strength is also high, but also has good wear resistance and foldability people feel for food packaging, food packaging derived from the first color, often a good package can give others a more far-reaching misses. Food packaging color contact is very large. Packaging for the role is to protect the merchandise, promotional role. The colors for the promotional role of product self-evident. Not only beautify the commodity, but also plays an essential commodity marketing in the marketing function.