The automated pressure filter test is used for determining quality differences in a polymer caused by agglomerates, insufficiently dispersed fillers resp. contaminations also in the bypass directly at the production extruder. For this version, the screens are automatically changed.
The melted thermoplastic polymer flows via a filter screen. Agglomerates, contaminations and other insufficiently dispersed resp. melted particles cause an increasing clogging of the filter screen – this increases the pressure in the measuring chamber. The pressure transducer registers the pressure increase in front of the screen and documents it in the measuring trend. The pressure curve shows the quality of the melt and enables a valid statement about the quality of the recycled material, compounds or masterbatches based on valid data.
During the filter change, extruder and melt pump continue running. A filter magazine for up to 20 filter cassettes guarantees the continuous operation of the pressure filter test.
Fully integrated evaluation software
|Parameters/Pressure Filter Test||AFT MP|
|Connected load||4 kW, 3 x 9 A, 400 V|
|Pressure sensor||200 bar|
|Volume throughput||5 – 100 ccm/min|
|Outer dimensions (without switch cabinet and sub-construction)||H x W x D= 504 x 269 x 970 mm|
Measuring unit – melt pressure sensor, automated melt valve, integrated, automated screen changer
Melt pump – for transporting a defined, constant melt flow
Filter cassettes – exchangeable magazine for 20 filter cassettes
Screen filter – with different fineness
Control – separate switch cabinet with practical control panel
Protocol – display of the pressure increase over time
Combinable with all extruders
EN 15348 / plastics – recycled plastics: characterization of Poly(ethylenterephthalate) (PET) recyclates
EN 13900-5 / pigments and extenders: methods of dispersion and assessment of dispersibility in plastics – Part 5: determination by filter pressure value test