Mixing, kneading, compounding and plasticizing A typical mixer test is run at a defined speed (shear rate) versus time, and the material’s response is recorded as torque. The mixing chamber is temperature-controlled precisely by independent heating and cooling zones, but due to the frictional heat in the mixing bowl, a change in the material’s melt temperature is observed and recorded as measuring signal. This “Rheogram” (torque, melt temperature vs. time at constant speed) is characteristic for different materials or blends and often used as a “fingerprint” in Quality Control for incoming or outgoing product inspection. Different additives in type and concentration can be measured and quantified objectively through the melting behavior, consumed energy or melt viscosity (recorded torque). Typical investigations Testing the melting and degradation behavior of polymer melts Quantifying viscosity when adding nano-particles or other additives Testing the gelation- and plasticizing behavior of PVC dry-blends Measuring the flow- and curing behavior of thermosetting plastics Characterizing the influences of different additives such as carbon black, fillers, lubricants, accelerators or sulphur for rubber mixtures Recording the masticating and vulcanizing behavior of elastomers Measuring the oil absorption of carbon black Quantifying the absorption of DOP for PVC dry-blends Measuring the stable torque in regard to individual and combined influences of fillers and additives such as stabilizers, lubricants and color pigments Testing high performance plastics to check processability Performing electric conductivity measurements for rubber mixtures
HAAKE™ Rheomix QC Lab Mixers for the HAAKE™ PolyLab™ QC System
HAAKE™ Rheomix QC Lab Mixers for the HAAKE™ PolyLab QC System torque rheometer platform are focused on batch testing of many highly viscous substances.
Сatalog number:
QCMIXER
Category: Extruders
Description
Additional information
Torque Rheometer |
Yes |
---|---|
Unit Size |
Each |
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