The manual COLLIN pressure filter test is used for determining quality differences in a polymer caused by agglomerates, insufficiently dispersed fillers resp. contaminations.
A filter cassette in pre-heating position enables a quick and clean manual filter change without extruder stop. During the filter change, the melt is diverted via a bypass valve in front of the filter.
The material to be tested is melted in an extruder, homogenized and guided through a screen via a melt pump with a defined and constant volume flow. Particles from a certain size clog the screen and thus, the open surface of the screen is decreased. Consequently, the pressure in front of the screen is increasing and determined by a sensor.
Testing of masterbatches, virgin and recycling materials
Microprocessor control with HMI, function keys and data wheel.
Bridge breaker in the hopper
Rheological measurement set-up
EN 13900-5/ pigments and extenders: methods of dispersion and assessment of dispersibility in plastics – Part 5: determination by filter pressure value test.
EN 15348 Standard Specification for Polyolefin Monofilaments, Part 17: Polyolefin Material Cleanliness.