Shear viscosity and elongational viscosity measurement R6000

basic information

【Features】 ○ Revolutionary twin capillary method ○ Evaluation of processability by elongational viscosity ○ High measurement reproducibility ○ Latest motor control and extensive shear rates ○ Excellent control technology ○ Touch panel that consolidates functions ○ Pressure balance detection function ○ Database function ○ Rheology calculator ● For more details, please contact us or refer to the catalog.

Price information

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Delivery Time

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Applications/Examples of results

◎ A computer-controlled twin capillary rheometer with two measuring cylinders. ◎ No regular calibration work by the operator is required! ◎ Automatic calibration with a platinum sensor (high precision 0.01%, temperature stability 0.0003%/°C, long-term variation rate 0.001%/year). ◎ The barrel is divided into three zones, each independently controlled for temperature. The overall temperature uniformity of the barrel is excellent! ◎ The temperature control sensor is installed in a newly developed knuckle heater, very close to the center of the barrel. The sample temperature is accurately controlled. ◎ The variable range of piston speed is from 0.01 mm/min to 500 mm/min (with an option for a maximum speed of 1,000 mm/min). ◎ Using a 0.25 mm die, the shear rate can reach up to 9.6 × 10^5/s. ◎ An ultra-precision pressure sensor is used for measuring resin pressure, providing excellent measurement stability! ◎ The software includes a pressure equilibrium point detection function, capturing accurate pressure data in the minimum necessary time. ◎ The pressure sensor is inserted at the die entrance to directly measure the resin pressure. The load applied to the piston is measured separately with a load cell. ◎ A forced exhaust system can also be installed in case toxic gases are generated during measurement.

Detailed information

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  Various Innovations for High-Precision Measurement By setting a die with a different L/D ratio for the two measurement bores, viscosity measurements corrected for tube length can be achieved in one pass. Tube length correction contributes to improved measurement accuracy and reduced measurement time across a wide range of shear rates. The Rabinovich correction is used as the standard calculation. For flow within the die, the velocity distribution is automatically corrected to reduce measurement errors.

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  Evaluation of Processability by Extensional Viscosity The extensional viscosity in the velocity range of actual molding can be obtained. Extensional viscosity is a parameter sensitive to molecular structure and has a significant impact on fluidity. Reliable evaluation of processability is achieved through extensional viscosity at molding speeds. Extensional viscosity has a considerable influence on various flow fields, such as the fluidity in narrow runner sections, dimensional stability in inflation molding, drawdown behavior in hollow molding, and dimensional stability in casting.

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  A touch panel that consolidates functions. The up and down movement of the piston and temperature settings can also be operated from the main unit's touch panel. Automatic temperature increase to the measured temperature using a weekly timer is also possible. The output status of the pressure sensor and the temperature of each zone of the barrel are displayed in real-time.