Polyester films known as ____________ are used for making magnetic recording tapes in audio casettes etc.,

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Solution

BoPET (biaxial oriented polyethylene terephthalate) is a polyester film made from stretched polythene terephthalate (PET) and is used for its high tensile strenghth, chemical and dimensional stability, transparency, reflectivity, gas and aroma barrier properties, and electric insulation

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