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largest species.②non-fiber grade polyester also bottles,films and other purposes,are widely used in the packaging industry,electronics,health care,construction,automotive and other fields,where packaging is the largest non-polyester fiber applications market,but also the fastest-PET Fast field.2 Benefits editor①has good mechanical properties,impact strength is three to five times that of other films,folding is good.②oil,fat resistant,resistant to acid,alkali,resistant to most solvents.③has excellent resistance to high and low temperature performance,long-term use temperature 120℃range,short-term use can withstand 150℃high temperature resistant cryogenic-70℃and high,its mechanical properties at low temperature has little effect.④gas and water vapor permeability is low,that has excellent gas barrier,water,oil and odor performance.⑤transparency,can block ultraviolet rays,good.