Rheograph 25 / 75 / 120High Pressure Capillary Rheometers

certified according to DIN EN ISO 9001:2000GFT 011-9-09

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Tensile Tester ExtruderElastomer Testing Capillary RheometersOn-Line SystemsMelt Indexer

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 param-eters 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 FrameworkTM” 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.

GOETTFERT’s line of multi functional, high pressure capillary rheometers with a wide variety of barrel configurations.

High Pressure Capillary RheometersRheograph Series

Rheograph 25

3

Only in a Rheograph 0 to 40 in 0.6 seconds

Rheograph 120

• One,twoorthreebarrelsystemsin9.55,12,15,20,25or30mm–evenmixedsizesarepossible• Speedrange0.00005-40mm/sec(=1:800000)underallloadconditions• Fastaccelerationofthepiston:from0to40mm/sin0.6seconds• Displacementsensorwithanencoderresolutionof0.0000016mm• Temperaturerangeupto400°C(500°Coptional),displayresolution0.01°C• “Plug&Play”pressuretransducerconnectivitywithouttheneedformanualentriesbytheuser• WithourspecialCANbuspressuretransducers,theAdaptivePressureSignalProcessorresolves pressurereadingsdowntoonly0.005%offullrange

Technical Highlights

44

Tensile Tester ExtruderElastomer Testing Capillary RheometersOn-Line SystemsMelt Indexer

25, 75 or 120 kN force range! and much more!

• DetectionofflowinstabilitieswithourShark-Skinoption• DeterminationofThermalConductivityinthetestbarrel• EvaluationofPVT(Pressure/Volume/Temperature)dataunderisobarandisothermconditions allows to interpret thermodynamic properties• DeterminationofelasticmemoryandelasticityofthemeltusingstaticordynamicLaserDieSwell Measurements• DeterminationofthepressureinfluenceontheviscosityfunctionviatheCounterPressureChamber• ViscositymeasurementswithSlitCapillaries• DeterminationofshearheatingwithThermocouples• Corrosionandwearresistantmeasurementsystemsindifferentsizes• RheotensorHAUL-OFF-systemforthedeterminationofmeltextensionability• LowtemperaturemeasurementswithCoolingCoilsandexternalcryostat

Summary of available options

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GOETTFERT’sAdaptivePressureSignalProcessorallowsreadingsofonly0.005%offullrangeofthepressuretransducerused.Inpracticalterms,thismeansthatyoucanusea2000bartransducertoseedifferencesofonly0.1bar.AllofGOETTFERT’sspecialCANbuspressuretransducersarerigorouslyandindividuallytestedandcalibrated.BasedonourISO9001QSmanual,onlycertifiedtoolsareused,andalldatapointsareloaded into the transducer for unsurpassed and automated calibration curve fitting. Testing proto-cols are available with each transducer.

Identifiablepressuresof0.1barcanbedetectedwitharesolutionof0.005%(2000bartransducer).

Adaptive Pressure Signal ProcessingA unique way for using almost 100% of your pressure transducer range, down to the lowest readings without noise

High value feature:

6

160

165

170

175

180

185

0 5 10 15 20

90 110 130 150 170 190 210 2300,2

0,22

0,24

0,26

0,28

0,3]

]]

0 [bar100 [bar200 [bar500 [bar]900 [bar]

1051,30

1101,30

1151,30

1201,30

1251,30

1301,30

1351,30

20,00 70,00 120,00 170,00 220,00 270,00

P [bar]2004006008001000

T[°C]

VOLs

p[m

m³/g

]Th

erm

al c

ondu

ctiv

ity [W

/mK]

Temperature [°C]

Pres

sure

[bar

]

Time [s]

Shark Skin Analysis

Thermal Conductivity measurement

Rheograph Major options in more detail

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 revolu-tionary 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.

• 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

PVT Pressure-Volume-Temperature measurement

77

Tensile Tester ExtruderElastomer Testing Capillary RheometersOn-Line SystemsMelt Indexer

RheographMajor options in more detail

Haul-Off melt strength measure-ment

Rheotens exten-sional viscosity measurement

Counter Pressure Chamber to measure pressure dependant viscosity

Laser Die Swell 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

• 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

Process conditions in production of plastics and rubber (such as injection molding, extru-sion with long deformation paths, pump flow, etc) often occur under high pressures. Here, viscosity often shows its pressure depen-dency. 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

• 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

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• Calculationsforroundholeandslitcapillaries• CorrectionswithRabinowitsch-Weissenberg,Bagley(linear/non-linear),Mooney,Hagenbach,Gleissle• Approximationofflowcurvesaccordingtofollowingmodels:Ostwald-DeWaele(Powerlaw), Carreau-Winter,Yasuda,Sabia,MuenstedtandCross• ElongationviscositywithCogswell• AdditionalevaluationtoolssuchasNonNewtonianIndexcalculation(NNI),thermaldegradation, relaxation,wallslipandrampfunctions• Normalstress• TemperatureShift oCreationofmastercurvesatdifferenttemperatures oDeterminationofmodelcoefficientsforthemastercurve oApproximationofthemastercurveaccordingtoCarreau-WinterandCross oCalculationofshiftfactorsaccordingtoWLFandArrhenius

Evaluation

Functionality

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.Easeofuse,coveringawiderangeofapplicationneeds,thissoftwareoffersanall inonesolutiontool.• UseofMicrosoftACCESSDatabase• Freelyconfigurabledisplayofdatatablesandgraphics• Automatedacquisitionofalltestinstrumentdata• On-linehelp,self-diagnosticandinfofieldstohelptheuser• Openplatformforuserspecifiedfieldsandfiltersformeasurements• Managedaccessformoredatasecurity

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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:

All options can be installed and used with the Rheograph 25, 75 and 120. More applications and modifications on request

* in range from 1% to 100%

Detection of flow instabilities (Shark-Skin) Thermal Conductivity PVT Die Swell Melt Cutting Unit Pressure dependence of Viscosity (Counter Pressure Chamber) 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

Test

bar

rel g

eom

etry

Specifications

1-Ba

rrel

2-Ba

rrel

3-Ba

rrel

06.08

ww

w.g

rafik

us.d

e

Germany (World Headquarter)

G Ö T T F E R TWerkstoff-Prüfmaschinen GmbHSiemensstraße 2Postfach 12 61D-74722 Buchen/Odenwald

Phone +49 6281/408-0Fax +49 6281/408-18info@goettfert.dewww.goettfert.de

USA, Mexico, Canada

G OE T T F E R T Inc.488 Lakeshore ParkwayRock Hill, SC 29730USA

Phone +1 803/324-3883Fax +1 803/324-3993info@goettfert.comwww.goettfert.com

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RTR / RTS-TD

Flat-/Blow film unit with

film analysis