Polymer Filter Pressure Value (FPV) Test Machine

Filter Pressure Value (FPV) Test Machine is a device used to test the dispersion properties of polymers such as pigments and masterbatches. It is mainly composed of a single screw plasticizing unit, a melt pump, a filter screen, a pressure sensor, a measurement and control unit, a display device, etc. During the test, the melt pressure before the filter screen when the pure material is extruded is first tested, and then the sample prepared in a specified proportion is put in for measurement.

The measurement and control software records the change curve of the melt pressure before the filter screen, and analyzes and calculates the ratio of the pressure increase value to the sample mass, that is, the FPV value. When the mixed material in a molten state passes through the filter screen of the barrel, the granular material will be gradually retained, and then the filter screen will be blocked, and an obvious pressure peak will appear. This pressure value can be used as an ideal indicator to describe the dispersion effect of the masterbatch.

If the masterbatch has poor dispersion, there will be agglomerated particles during the processing process, which will cause the filter screen to be blocked when flowing through the filter screen, resulting in an increase in the melt pressure before the filter screen. The FPV value can characterize the dispersion effect of the masterbatch. The smaller the FPV value, the better the dispersion. FPV testing instruments are widely used in polymers such as PP, PE, and PET, especially in masterbatch production and quality control. Through FPV testing, the dispersion performance of the masterbatch can be evaluated to guide the optimization and improvement of the production process.

The test raw materials are first melted and homogenized by a single-screw extruder, and then transported to the die head equipped with a filter screen by a melt pump. The instrument measures and records the melt pressure change curve before the filter screen in real time through sensors and measurement systems, and automatically analyzes and calculates the filter pressure value to determine the dispersion performance of masterbatch or other filling materials.

• Meets ASTM and EN 13900-5 testing standards.
• Made of 38CrMoAl chromium-molybdenum alloy special tool steel, with surface tempered, nitrided, chromium plated, polished and ultra-finely diffracted.
• Equipped with precision gear motor.
• Equipped with high precision material temperature sensor to monitor the melt temperature change.
• Screw speed is adjustable.
• Equipped with PID/LED/RKC intelligent digital display temperature controller, using high-precision digital instrumentation to display all the extrusion parameters, including temperature control, drive, pressure, interlocking functions.
• Equipped with a quality melt pump for high-precision delivery of the melt.
• High-precision measurement of melt volume flow rate can be realized.
• Equipped with high-precision sensors to realize accurate measurement of melt pressure before and after pumping.
• Special data acquisition and display system automatically analyzes and calculates the filtration value.
• Equipped with liquid crystal display to input and display the operation status and parameters.
• Automatic output of test results with intuitive interface and accurate data.

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