A process and an apparatus for manufacturing bi-axially oriented polyester film from rpet

A process for preparing a biaxially oriented polyethylene terephthalate (BOPET) film comprising, the steps of

• preparing a recycled polyethylene terephthalate (RPET) granules, comprises
• depolymerization by glycolysis of a pre cleaned PET products to produce monomers,
• polycondensation of monomers in a polycondensation reactor or an autoclave to produce recycled PET (RPET) granules.
• preparing the biaxially oriented polyethylene terephthalate film, comprises
• charging the RPET granules along with a virgin PET granules, to an extruder to obtain a molten polyethylene terephthalate,
• extruding the molten polyethylene terephthalate through a die,
• quenching the extruded polyethylene terephthalate on chilled rollers and stretching to obtain biaxially oriented polyethylene terephthalate film.
• characterized in that, the glycolysis reaction is conducted in an esterification reactor by addition of glycol, at a temperature of 245-255° C. and at a pressure of 0.5-1 bar, and
• the RPET granules are up to 100% in the mixture of the RPET and virgin PET granules, charged to the extruder.