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According to the material and process classification of polyester film: 1. Biaxially oriented polyester film has the characteristics of high strength, good rigidity, transparency and high gloss; it is odorless, tasteless, colorless, non-toxic, and outstanding strength and toughness; Its tensile strength is 3 times that of PC polycarbonate film and PA nylon film, and its impact strength is 3-5 times that of BOPP film. It has excellent abrasion resistance, folding resistance, pinhole resistance and tear resistance. Etc.; heat shrinkage is very small, at 120 ℃, only 1.25% shrinkage after 15 minutes; has good antistatic properties, easy to vacuum aluminum plating, can be coated with PVDC, thereby improving its heat sealability, barrier properties and printing The adhesion; BOPET also has good heat resistance, excellent cooking resistance, low temperature freezing resistance, good oil resistance and chemical resistance. Except for nitrobenzene, chloroform, and benzyl alcohol, BOPET film cannot be dissolved by most chemicals. However, BOPET will be corroded by strong alkali, so care should be taken in actual use. BOPET film has low water absorption and good water resistance, suitable for packaging food with high water content. 2. Uniaxially stretched polyester film is a film that is dried, melted, extruded, casted and stretched longitudinally by using semi-dull material (adding titanium dioxide to the raw material polyester chip), the grade in polyester film And the lowest price, mainly used for pharmaceutical tablet packaging. Due to the small amount of use, few manufacturers produce on a large scale, accounting for about 5% of the polyester film field, and domestic companies also rarely import. The standard thickness has specifications such as 150μm. It is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc. With a wide variety of products, affordable prices, and environmental protection, we provide customers with excellent quality and service based on the service tenet of excellence in production, honesty and trustworthiness in distribution, and warm and thoughtful service. Interested parties welcome to inquire!