Polyester film is a kind of polymer plastic film, which is more and more favored by consumers because of its excellent comprehensive properties. Usually colorless, transparent, glossy film (now can be added to the additive particles to make it have color), excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low-temperature resistance, chemical resistance, oil resistance, airtightness, and fragrance retention are good, is one of the commonly used barriers composite film substrate. Polyester film manufacturer shows that polyester film can be divided into two categories according to material and production process.
1. Biaxially oriented polyester film, which is made of a lustrous material. The Bopet film has the characteristics of high strength, good rigidity, transparency, and high gloss. It is odorless, tasteless, colorless, non-toxic, and has outstanding strength and toughness. Its tensile strength is 3 times that of PC Film and nylon film, its impact strength is 3-5 times that of Bopp film, which has excellent wear resistance, folding resistance, pinhole resistance, and tear resistance, etc. With good anti-static, easy vacuum aluminum plating can be coated PVDC, thus improving its heat sealing, barrier, and printing adhesion; Bopet also has good heat resistance, excellent cooking resistance, low temperature freezing resistance, good oil resistance, and chemical resistance. Bopet film except for nitrobenzene, chloroform, and benzyl alcohol, most of the chemicals can not make it dissolve. However, the polyester film manufacturer explained to you, that Bopet will be strong alkali erosion, use should be noted. Bopet film has low water absorption, and water resistance, suitable for packaging high water content food.
2. Uniaxial tensile polyester film is produced by the processes of drying, melting, extruding, casting, and longitudinal stretching of polyester film manufacturers with semi-extinction material, which has the lowest grade and price in polyester film, mainly used for pharmaceutical tablet packaging. As a result of less use, polyester film manufacturers have less large-scale production, about 5% of the polyester film field, China's enterprises also fewer imports, the standard thickness of 150μm.