PRESSURE FILTER TEST The real history behind the Pressure Filter Test More than 25 years successful in the determination of the pressure filter value during the production of masterbatches and compounds

PRESSURE FILTER TEST The real history behind the Pressure Filter Test More than 25 years successful in the measuring of the pressure filter value during the production of masterbatches and compounds In 1998, several companies founded the „CEN Committee Filtertest“ (CEN Committee Pressure Filter Test): BASF, Clariant, Degussa, Ciba, GABRIEL-CHEMIE as well as Dr. COLLIN GmbH, Brabender Messtechnik and Thermo Electron – manufacturers of laboratory lines for the plastic processing industry. This initiative had the aim to develop a standardized method for the determination of the pressure filter value...

Extra options pressure filter test at the test extruder ► Fortesting larger quantities of polymer, which require higher throughputs, the measuring head is mounted on an extruder with a screw diameter of 25 mm or 30 mm. ► The filter test is mounted on a movable unit, that increases ► A PC, connected with the line, measures the melt pressure in front of the filter, the melt temperature and the melt pump speed. Pigments and Extenders - Methods of dispersion and / or assessment of dispersibility in plastics - Part 5: What does the norm say Screw diameter Melt pump Test amount Theoretical throughput...

ISO 23900-5 – Test Procedure 1. Mount the screen-pack 2. Start the test line with basic test polymer 3. Load test mixture in hopper 4. Start of the test 5. Purge with 100 g basic test polymer 6. Stop of the test 7. Purge with 100 g basic test polymer ISO 23900-5 – Test Result Evaluation and visulalisation of the measurement = filter value, bar/g = maximum pressure, bar = initial pressure, bar = initial pigment weight, g Curve depends on test material Possible pressure drop because of rheological characteristics This calculation refers to the standard EN13900-5 resp. ISO 23900-5. Purging with...