Rheograph 25 / 75 / 120 High Pressure Capillary Rheometers

Rheograph 25 / 75 / 120
High Pressure Capillary Rheometers
certified according to DIN EN ISO 9001:2000
GFT 011-9-09

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Tensile Tester
Extruder
Elastomer Testing
Capillary Rheometers
On-Line Systems
Melt Indexer
High Pressure Capillary Rheometers
Rheograph Series
GOETTFERT’s line of multi functional, high pressure capillary rheometers with a wide variety of
barrel configurations.
Rheograph 25
The Rheograph 25, 75 and 120 with CAN-bus electronics for a higher degree of automation and thereby
user friendliness comes with a color touch-screen monitor. Each one is a leader in its class regarding their
respective technical specifications.
High speeds are available for extreme large shear rate range testing. Coupled with a high force rating
and our unique CAN bus Plug & Play pressure measurement system, measurement curves over wide ranges
can be taken in one run and with one setup. This unique system ensures that the pressure transducers parameters
are now automatically transferred to the software.
Most extraordinary, with GOETTFERT’s Adaptive Pressure Signal Processor, readings of only 0.005%
of full range become useful. Combined with our software LabRheo, based on “Microsoft .NET
Framework TM ” real time monitoring of the test shows how pressures over the full range can now
be used for the very first time and offers all evaluation tools bundled in one software with a variety
of output choices.
These instruments are dynamic like no other, a compelling technical argument in itself, but with
unique options and crafted to perfection the performance leap is undeniable.

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Only in a Rheograph
0 to 40 in 0.6 seconds
Rheograph 120
Technical Highlights
• One, two or three barrel systems in 9.55, 12, 15, 20, 25 or 30 mm – even mixed sizes are possible
• Speed range 0.00005 - 40 mm/sec (= 1:800000) under all load conditions
• Fast acceleration of the piston: from 0 to 40 mm/s in 0.6 seconds
• Displacement sensor with an encoder resolution of 0.0000016 mm
• Temperature range up to 400°C (500°C optional), display resolution 0.01°C
• “Plug & Play” pressure transducer connectivity without the need for manual entries by the user
• With our special CAN bus pressure transducers, the Adaptive Pressure Signal Processor resolves
pressure readings down to only 0.005 % of full range

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Tensile Tester
Extruder
Elastomer Testing
Capillary Rheometers
On-Line Systems
Melt Indexer
25, 75 or 120 kN force range!
and much more!
Summary of
available options
• Detection of flow instabilities with our Shark-Skin option
• Determination of Thermal Conductivity in the test barrel
• Evaluation of PVT (Pressure/Volume/Temperature) data under isobar and isotherm conditions
allows to interpret thermodynamic properties
• Determination of elastic memory and elasticity of the melt using static or dynamic Laser Die Swell
Measurements
• Determination of the pressure influence on the viscosity function via the Counter Pressure Chamber
• Viscosity measurements with Slit Capillaries
• Determination of shear heating with Thermocouples
• Corrosion and wear resistant measurement systems in different sizes
• Rheotens or HAUL-OFF-system for the determination of melt extensionability
• Low temperature measurements with Cooling Coils and external cryostat

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Adaptive Pressure Signal Processing
A unique way for using almost 100% of your pressure
transducer range, down to the lowest readings
without noise
GOETTFERT’s Adaptive Pressure Signal Processor allows readings of only 0.005% of full range of the
pressure transducer used. In practical terms, this means that you can use a 2000 bar transducer to
see differences of only 0.1 bar.
All of GOETTFERT’s special CAN bus pressure transducers are rigorously and individually tested and
calibrated. Based on our ISO 9001 QS manual, only certified tools are used, and all data points are
loaded into the transducer for unsurpassed and automated calibration curve fitting. Testing protocols
are available with each transducer.
High value feature:
Identifiable pressures of 0.1 bar can be detected with a resolution of 0.005 % (2000 bar transducer).

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Rheograph
Major options in more detail
Shark Skin Analysis
Flow-instabilities such as shark skin have
long been observed, but difficult to measure.
Common pressure or force transducers
(typical 10 Hz max.) cannot pick up the slight
pressure spikes caused by the instability.
In cooperation with Professor M. Wilhelm
(Institute of Applied Chemistry and Polymer
Chemistry in Karlsruhe, Germany), a revolutionary
sensory device was developed. Using
a slit die and high frequency sensors with up
to 20 kHz sampling rate, the smallest pressure
peaks can be measured and analyzed. Results
are evaluated in our special software and
used to optimize extrusion, film and coating
processes.
Pressure [bar]
185
180
175
170
165
160
0 5 10 15 20
Time [s]
Thermal
Conductivity
measurement
PVT
Pressure-Volume-
Temperature
measurement
• Measurement of heat conductivity
• Temperature range up to 450°C,
pressure up to 1000 bar
• Developed according to ASTM D5930
• Test probe with integrated heater element
and temperature sensor
• No mechanical changeover required
• Process simulation and optimization of
injection molding cycle times
• Measurement according to ISO 17744
• Determination of characteristics
Pressure, Volume and Temperature
• Measurements isobar and isotherm
• Presentation of a PVT diagram
• Variable test sample volume
• Easy handling with quick die locking system
• Optimizing of the flow and shrinkage
properties during production process
VOLsp[mm³/g] Thermal conductivity [W/mK]
0,3
0,28
0,26
0,24
0,22
0,2
1351,30
1301,30
1251,30
0 [bar]
100 [bar]
200 [bar]
500 [bar]
900 [bar]
90 110 130 150 170 190 210 230
Temperature [°C]
P [bar]
200
400
600
800
1000
1201,30
1151,30
1101,30
1051,30
20,00 70,00 120,00 170,00 220,00 270,00
T[°C]

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Tensile Tester
Extruder
Elastomer Testing
Capillary Rheometers
On-Line Systems
Melt Indexer
Rheograph
Major options in more detail
Laser Die Swell
measurement
• Dynamic and static measurement
• Analysis of swell profile (Basell Method)
• Height adjustable mount
• Standard resolution with 7 µm (micrometer)
or with the high resolution system 0.1 µm
• Melt cutting system
Counter Pressure
Chamber to measure
pressure dependant
viscosity
Process conditions in production of plastics
and rubber (such as injection molding, extrusion
with long deformation paths, pump flow,
etc) often occur under high pressures. Here,
viscosity often shows its pressure dependency.
The new Counter Pressure Chamber
can be adjusted to simulate different pressure
drops, thereby measuring the viscosity close
to process conditions.
• Measurement of pressure coefficient
• Measurement of wall slip’s critical shear rate
• Max. Pressure (Pm) 120 MPa
Rheotens extensional
viscosity
measurement
• Measurement of melt extensional viscosity
(Model Wagner), especially for materials
used in blown film and forms, spinning and
coating
• Variable speed 0 - 190 cm/s
• Linear or exponential acceleration
• Force measurement range 0 - 2 N,
resolution 0.001 N
• Automated force calibration
Haul-Off melt
strength measurement
• Measurement of melt strength, especially
for materials used in fiber spinning
• Standard variable speed 0 - 600 m/min,
with the high speed system 0-2000 m/min
• Linear or exponential acceleration
• Force measurement range 0 - 2 N,
resolution 0.001 N

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LabRheo
Based on Microsoft’s .NET framework, this software is
fully network capable and allows parameter
manipulation, measurement and evaluation of all the
rheometer’s functions.
Functionality
Evaluation
Ease of use, covering a wide range of application needs, this software offers an all in one solution
tool.
• Use of Microsoft ACCESS Database
• Freely configurable display of data tables and graphics
• Automated acquisition of all test instrument data
• On-line help, self-diagnostic and info fields to help the user
• Open platform for user specified fields and filters for measurements
• Managed access for more data security
• Calculations for round hole and slit capillaries
• Corrections with Rabinowitsch-Weissenberg, Bagley (linear/non-linear), Mooney, Hagenbach, Gleissle
• Approximation of flow curves according to following models: Ostwald-De Waele (Power law),
Carreau-Winter, Yasuda, Sabia, Muenstedt and Cross
• Elongation viscosity with Cogswell
• Additional evaluation tools such as Non Newtonian Index calculation (NNI), thermal degradation,
relaxation, wall slip and ramp functions
• Normal stress
• Temperature Shift
o Creation of master curves at different temperatures
o Determination of model coefficients for the master curve
o Approximation of the master curve according to Carreau-Winter and Cross
o Calculation of shift factors according to WLF and Arrhenius

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Specifications
Test barrel geometry
1-Barrel
2-Barrel
3-Barrel
Model Rheograph 25 Rheograph 75 Rheograph 120
Force range 25 kN 75 kN 120 kN
9.55 mm
12 mm
15 mm
20 mm
25 mm
30 mm
2x 12 mm
2x 15 mm
1x 12 mm + 1x 15 mm
2x 20 mm
2x 12 mm + 1x 15 mm
3x 12 mm
3x 15 mm
3x 20 mm
Other geometries on request
Temperature:
Range: +5°C higher than room temperature up to 400°C (option 500°C)
Temperature control algorithm, Display +/- 0.01°C
Temperature control: 3x Pt100 sensor
5 Temperature calibration and control data sets
Integrated timer for temperature set value
Motion:
Servo drive, resolution 0.0000016 mm
Test piston speed range 0.00005-40 mm/sec (1:800000)
Drive torque monitoring and display
Continuous variable control of test piston movement
Sensors:
Pressure transducers / Accuracy
20 to 2500 bar / 0.2% of range
Force transducers / Accuracy class / Accuracy 25 kN / 0.02 / 0.4%* 75 kN / 0.02 / 0.4%* 120 kN / 0.02 / 0.4%*
Maximum number of pressure / force transducers 5/2 5/3 5/3
Automatic identification of installed pressure transducers
Adaptive signal processing of pressure signal 0.005% 0.005% 0.005%
General:
Device integrated PC with 5.7“ Color-QVGA-Touchscreen
Microsoft Windows® data base Software „LabRheo“
Measuring mode constant speed or Pressure/Force
3 times overload detection
Power Supply 3x400V, 3x230V / 50/60Hz, et al.
Size device (width x depth x height) 920 x 600 x 1655 mm 1020 x 700 x 1775 mm 1020 x 700 x 1775 mm
Size tablee (width x depth x height) 920 x 700 x 620 mm 1020 x 700 x 620 mm 1020 x 700 x 620 mm
Weight about 400 kg / 900 lbs about 580 kg / 1300 lbs about 600 kg / 1400 lbs
Options:
Detection of flow instabilities (Shark-Skin)
Thermal Conductivity
All options can be installed and used with the Rheograph 25, 75
and 120.
More applications and modifications on request
PVT
Die Swell
Melt Cutting Unit
Pressure dependence of Viscosity (Counter Pressure Chamber)
* in range from 1% to 100%
Slit Die
Rheotens
Haul Off
Thermocouple (for determining the melt temperature)
External tempering of the test chamber (< room temperature)
Corrosion- and wear-resistant test barrel system
Nitrogen purge unit
Pneumatic or battery driven cleaning device

Germany (World Headquarter)
G Ö T T F E R T
Werkstoff-Prüfmaschinen GmbH
Siemensstraße 2
Postfach 12 61
D-74722 Buchen/Odenwald
Phone +49 6281/408-0
Fax +49 6281/408-18
info@goettfert.de
www.goettfert.de
USA, Mexico, Canada
G OE T T F E R T Inc.
488 Lakeshore Parkway
Rock Hill, SC 29730
USA
Phone +1 803/324-3883
Fax +1 803/324-3993
info@goettfert.com
www.goettfert.com
www.grafikus.de
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