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Metallized boPET film, 32 layers of ~14 μm thickness each. 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, and electrical insulation. [1]
Biaxially oriented PET (BOPET) film (including brands like "Mylar") can be aluminized by evaporating a thin film of metal onto it to reduce its permeability, and to make it reflective and opaque . These properties are useful in many applications, including flexible food packaging and thermal insulation (such as space blankets ).
Window films are also used to apply see-through graphics to glass and other transparent surfaces, to provide advertising, branding, signage and decoration. See-through graphics are most commonly applied using a perforated window film with a graphic visible from one side but not the other side, which remains see-through.
The distinction between promotional and fine art duratrans is purely in the subject matter of the artwork imaged onto the duratrans film. There is no other defining difference, except that possibly a fine art duratrans may be processed using higher resolutions, color depths, and/or other fabrication tolerances to effect a higher-precision result, for a more-demanding audience.
Mobility in these films is typically limited by ionized impurity scattering due to the large amount of ionized dopant atoms and is on the order of 40 cm 2 /(V·s) for the best performing TCOs. Current transparent conducting oxides used in industry are primarily n-type conductors, meaning their primary conduction is as donors of electrons.
Polyvinylidene chloride is applied as a water-based coating to films made of other plastics, such as biaxially-oriented polypropylene (BOPP) and polyethylene terephthalate (PET). This coating increases the barrier properties of the film, reducing the permeability of the film to oxygen and flavours and thus extending the shelf life of the food ...