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BoPET
Polyester film / From Wikipedia, the free encyclopedia
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BoPET (biaxially oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength,[1] chemical stability,[1] dimensional stability,[2] transparency,[1] reflectivity when metallized,[3] gas and moisture barrier properties,[3] and electrical insulation.[1] The film is "biaxially oriented", which means that the polymer chains are oriented parallel to the plane of the film, and therefore oriented in two axes.[3] A variety of companies manufacture boPET and other polyester films under different brand names. In the UK and US, the best-known trade names are Mylar, Melinex, Lumirror and Hostaphan.[4] It was the first biaxially oriented polymer to manufactured on a mass commercial scale.[5]
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