1. Description of the lines
These are two technological lines for the manufacturing (additional polycondensation) of the bottle grade PET resin which is used in the production of popular PET bottles for beverages. They are based on the solid state polycondensation technology developed by the famous Swiss BUHLER company. The production process depends on thermal treatment of the raw material (amorphous polymer A-PET of the Initial IV about 0.6 dl/g) in the equipment of the lines. The lines consist of five basic process loops each, where the material is treated by the temperature in the specified conditions for a certain period of time. During processing amorphous material, its molecular weight changes to the value expected for bottle grade, or higher, up - even to 1.0 dl/g. There is ability to process R-PET materials on these lines, too. Beside the standard bottle grade we have experienced processing R-PET and the fiber grade homo-polymers to the values of 0.96