Method and device for processing polycondensates

A device for processing polycondensates, with which a material can be processed into a melt in a form of granulate or in the form of recyclate, comprising:

• a first extruder comprising a filling region and a feed zone, and
• a second extruder downstream of the first extruder, wherein the second extruder being designed as a twin-screw extruder and the second extruder having at least one degassing zone, comprising
• a vacuum lock in which the material can be kept under a reduced pressure compared to the atmospheric pressure, wherein the first extruder being downstream of the vacuum lock,
• wherein in the second extruder the two screws are designed to rotate in opposite directions and wherein the second extruder has a metering zone following the degassing zone in the conveying direction, wherein a filter is arranged between the first extruder and the second extruder.

A device for processing polycondensates, with which a material can be processed into a melt in a form of granulate or in the form of recyclate, comprising:

• a first extruder comprising a filling region and a feed zone, and
• a second extruder downstream of the first extruder, wherein the second extruder being designed as a twin-screw extruder and the second extruder having at least one degassing zone, comprising
• a vacuum lock in which the material can be kept under a reduced pressure compared to the atmospheric pressure, wherein the first extruder being downstream of the vacuum lock,
• wherein in the second extruder the two screws are designed to rotate in opposite directions and wherein the second extruder has a metering zone following the degassing zone in the conveying direction, wherein a rheometer for measuring a viscosity of the material is arranged between the first extruder and the second extruder.

A device for processing polycondensates, with which a material can be processed into a melt in a form of granulate or in the form of recyclate, comprising:

• a first extruder comprising a filling region and a feed zone, and
• a second extruder downstream of the first extruder, wherein the second extruder being designed as a twin-screw extruder and the second extruder having at least one degassing zone, comprising
• a vacuum lock in which the material can be kept under a reduced pressure compared to the atmospheric pressure, wherein the first extruder being downstream of the vacuum lock,
• wherein in the second extruder the two screws are designed to rotate in opposite directions and wherein the second extruder has a metering zone following the degassing zone in the conveying direction, wherein a rheometer for measuring a viscosity of the material is arranged downstream of the second extruder.