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COF of PET film is used to describe the friction behavior of polyester film surfaces during starting and sliding contact. In technical data, it is typically reported as static COF and kinetic COF under a defined method such as ASTM D1894 or ISO 8295. Public PET and polyester film datasheets show that reported values vary by grade, surface, and…
The COF of PET film describes resistance when a defined surface starts and continues sliding against another surface. This reference applies to uncoated, coated, treated and PET-based protective film used in unwinding, slitting, laminating and die cutting. Each result must be read with its tested sides, method, load and conditioning history. Equipment compatibility, adhesive behavior and removal performance still require sample testing on the actual material and process.
Conventional PET and BOPET films commonly show a polyester film melting temperature of about 245-260 C by DSC. The reported onset, peak, or endset varies with grade, orientation, thermal history, and scan conditions. Use it for base-film identification, not as a finished-film service limit. Confirm adhesive, coating, surface, dwell, and removal behavior under intended conditions.
Polyester film shelf life depends on construction, packaging integrity, storage history, and retained properties. This reference covers plain, treated, coated, and adhesive-coated PET protective film. Use grade-specific limits. Inspect uncertain stock against approved data and confirm it by representative sample testing before full use.