Rubber Process Analyzer - RPA 8000

ASTM D6204, ASTM D5289, ASTM D6601, ISO 6502

Qualitest Rubber Process Analyzer - RPA 8000 is an advanced dynamic mechanical rheological test instrument. The RPA8000 is designed to measure dynamic mechanical rheological characteristics of polymers and rubber compounds before during and after cure

The Rubber Process Analyzer - RPA 8000 has many advantages over traditional rubber test methods due to the ability to test under conditions of variable strain frequency and temperature which reveal important differences in rheological, rheometric and dynamic viscoelastic properties. The versatility of this instrument allows for polymers and compounds to be comprehensively characterized, especially in terms of intrinsic material properties, processability characteristics and end product performance.

Specifications of Rubber Process Analyzer - RPA 8000
Standards Complies with ASTM D6204, ASTM D5289, ASTM D6601, ISO 6502
Temperature Microprocessor controlled, ambient to 230°C (446°F)
Oscillation Strain ±0.14 to ±1256% (±0.01° to ±90° of arc)
Oscillation Frequency 0.0016 to 33Hz (0.1 to 2000rpm)
Torque Range 0.001 to 225dN-m (0-200lb-in)
Units of measure Torque:               S’, S” (N-m, dN-m, lb-in, kg-cm)
Shear Modulus:    G’, G”, G* (Pa, MPa, psi)
Temp:                 °C, °F
Frequency:           cpm, Hz, rad/s
Strain:                 °arc, %
Optional calculated results: ŋ’, ŋ”, ŋ*, j’, j”, j* tanδ
Electrical 100/110/120/130VAC ±10%, 50/60±3Hz, 15amp single p
200/220/240/260VAC ±10%, 50/60±3Hz, 7.5amp single p
Dimensions (WxDxH) 70x80x130cm (28x32x53in.)
Weight 280kg (620lb)
Automation Optional 100 sample auto loader available to automatically load and unload samples

The optional auto loading fixture further improves the productivity of the Rubber Process Analyzer - RPA 8000. This option allows for up to 100 samples to be measured without operator interference. The auto loading fixture consists of a rotary tray staging system, sample loading arm, film transport system and controller. (use the two auto loading images for this text these needs to be fairly small)

Main application:

  • Incoming polymer characterization
  • Incoming raw material test
  • Master batch testing
  • Final compound testing
  • Cured compound testing
Application Variable Benefit
Polymer Strain Molecular weight distribution
  Frequency Ageing
  Stress Relaxation Consistent processing
Mixing Strain Dispersion
    Optimize cycle times
    Improved efficiency
    Reduced Scrap
Calandering/ Extrusion Strain Gauge control / Die swell
Injection Molding Strain Mold flow
  Frequency Mold fill
    Shear thinning
Cure Temp Optimized cycle times
    Minimized cycle times
    Maximum throughput
Post Cure Temp Damping
  Strain Rolling resistance
  Frequency Heat build up
  Stress relaxation  


Variable Strain
Variable Strain

Strain is applied via the oscillating lower die, under full computer control. The strain angle can be precisely varied between 0.05° and 90° in 0.01° increments. Torque modulus and viscosity are measured at pre determined frequency and temperature.

Variable Frequency
Variable Frequency

The oscillation frequency of the applied strain cam be varied with great accuracy between 0.03Hz and 33Hz. Torque, modulus and viscosity are measured at pre determined strain and temperature.

Stress Relaxation
Stress Relaxation

Modulus and torque are measured vs. time after a sample has been subjected to a pre-programmed strain.

Variable Temperature
Variable Temperature

During a test, the temperature can be varied between 20°C and 230°C with great precision. Torque, modulus and viscosity are measured under pre determined frequency and strain.

For more information about Rubber Process Analyzer - RPA 8000, please call us at 1.877.884.8378 or Click the button below.