MonTech USA

Mooney Viscometers

MonTech Mooney Viscometers are the leading test instruments for measuring viscosity, scorch, and stress relaxation on polymers and rubber compounds.

Mooney Viscometer

By testing the viscous flow of raw materials and masterbatches, Mooney Viscometers maintain stability and consistency in the manufacturing process.

With direct heating and a unique direct drive, the MonTech Mooney Viscometer is suitable for quality control or research and development purposes.

All Mooney Viscometers come with MonControl Software, featuring pre-programmed tests and built-in software control systems for automatic balancing and easy calibration

MV 3000 Basic

MV 3000 Basic

Entry-level Mooney Viscometer

MV 3000

MV 3000

Industry standard Mooney Viscometer

V-MV 3000

V-MV 3000

High-end Mooney Viscometer with variable rotor speed

Rotor Speed 2 turns per minute Variable:
0 to 50 turns per minute
0.01 steps
0 to 50 turns per minute
0.01 steps
Temperature System Ambient to 232 °C, precision +/- 0.03 °C
microprocessor controlled
Ambient to 232 °C, precision +/- 0.03 °C
microprocessor controlled
Ambient to 232 °C, precision +/- 0.03 °C
microprocessor controlled
Torque Range 0.01 to 230 MU 0.01 to 230 MU 0.01 to 230 MU
Closing Force 11.5 kN 11.5 kN 11.5 kN
Determinable Results
Mooney Viscosity
Stress Relaxation
Mooney Scorch
Linear Rotor Speed Variation
Stepped Rotor Speed Variation
International Standards
ISO 289:2005
ASTM D 1646
DIN 53525, part 1 - 4

Mooney Viscosity

The Mooney Viscosity test is the most popular test method for characterizing polymers and uncured rubber materials. Defined by international standards, the sample material is preheated for a defined period in a closed die cavity, then sheared by the embedded rotor at a constant rate. The Mooney Viscosity is recorded and data is automatically calculated at predefined time and viscosity points.

MonTech Mooney Viscometers offer superior precision and repeatability, providing the user with reliable data and making it easy to differentiate between different types and grades of polymers in order to ensure a high processing consistency.

mooney viscosity

Mooney Stress Relaxation

While Mooney Viscosity testing only provides information about the flow/viscosity of polymers and rubber compounds, stress relaxation testing assesses elastic material behavior.

Once the Mooney Viscosity test is completed, the rotor is stopped within 5 milliseconds and the torque decay is observed and recorded. Once the stress relaxation is completed, the slope-intercept and regression coefficient are calculated, providing excellent correlations in reference to polymer branching and processing.

mooney stress relaxation

Mooney Scorch

Mooney Scorch tests determine onset of vulcanization (also known as scorching behavior) in rubber compounds. This provides essential data for designing/controlling production processes and verifying material consistency.

Every MonTech Mooney Viscometer offers full Mooney Scorch and Delta Mooney testing capabilities. These capabilities feature a comprehensive selection of data points such as initial Mooney viscosity, minimum viscosity, scorch times and scorch viscosities.

mooney scorch

Mooney Viscosity at Shear Rates and Temperatures

MonTech Variable Mooney Viscometers offer full dynamic testing capabilities, allowing measurement of viscosity at variable shear rates and temperatures matching process conditions.

Non-isothermal sequences, variable rotor speed profiles, and step-relaxations can easily be programmed and executed. This allows a detailed and complete understanding of the polymer behavior.

shear rates

Pneumatic Cooling System

This pneumatic air cooling system cools both dies separately using independent PID-controllers, rapidly cooling the instrument from higher to lower testing temperatures. When using non-Isothermal and RPA operation modes this system enables cooling at any point during the test.

  • • Allows test sequences to follow precise cooling ramps and steps
  • • Conducts friction heat away from the sample when testing at high shear rates
  • • Reduces non-productive time of the instrument and operator by shortening stabilization time
  • • Air lines have quick connects at each platen, and exhaust through the platen assemblies
  • • Air is supplied by an independent regulator on the back of the machine

Instrument Control Panel

The 5“ Color-Touchscreen allows the machine to be operated from a remote computer or completely standalone for simple quality control testing.

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