RH2000 Capillary Rheometer
The RH2000 Series - RH2100 & RH2200
Advanced bench-top, capillary rheometers suitable for research, product development and quality control.
The RH2000 series of bench top capillary rheometers are compact systems capable of most testing requirements encountered in capillary rheometry. The series is available in both single bore or twin bore configurations in the form of the RH2100 and the RH2200. Both versions of Rosand's bench top rheometer incorporate many of the features and attributes found in the floor standing models. A new digital drive system, gives the RH2000 series unsurpassed performance in terms of speed control, accuracy, and dynamic operating range. This new hardware is supported by the latest generation of 32 bit Windows™ based software, Flowmaster™, with many new experimental possibilities.
Specification
- Drive Force:
- 12kN (standard)
20kN (option) - Frame Stiffness:
- 100kN
- Drive Speed Maximum:
- 600mm/min (standard)
1,200mm/min (option) - Dynamic Speed Range:
- 120,000:1
(240,000:1 with high speed option) - Temperature Range:
- Ambient to 400°C, 500°C option.
Low temperature cooling coil Option.
Min temperature 5°C, twin bore. - Bore Diameter:
- 15 mm Standard, 9.5, 2, 19 & 24 mm bore options
- Barrel Bore Length:
- 250mm
- Barrel Material:
- Standard Nitrided Steel,
Hastelloy or Stainless Steel options. - Pressure Transducer Ranges (PSI):
- 30,000, 20,000, 10,000, 5,000, 1,500, 500
- Pressure Transducer Accuracy:
- Better than 0.5%
- Dies:
- Tungsten Carbide, precision +/- 5 micron
- Die Diameter:
- 0.5 to 3mm Standard,
other diameters available to special order - Software analysis functions:
-
Calculation of non-Newtonian Index
Calculation of Rabinowitsch Corrections
Hagenbach Correction for fluid inertia
Cogswell Convergent Flow Model /
Extensional Flow Assessment
Extensive Plot and Print Options
Data Export
- Optional Software Module:
-
Melt Fracture/Flow Instability Test Software
Wall Slip Analysis Software
Material Degradation/Thermal Stability Test Software
Low Speed Degradation Test Software
ETA-0 Analysis Software
Stress Relaxation Test and Analysis Software
Laser Die Swell Options
- Single Axis Laser Die Swell:
- Resolution 10 microns
- Single Axis Twin Extrudate Laser Die Swell (RH2200 only):
- Resolution 10 microns
Die & Melt Cutters
- Die cutter:
-
Die to cut distance : 0mm
Die to Sensor distance (strand length) : 85mm
Recommended maximum shear rate : 1000 s-1 - Melt Cutter Single Strand:
-
Die to cut distance : 100 to 160 mm
Die to Sensor distance (strand length):
150 to 210 mm (50 mm below cut)
Recommended maximum shear rate : 1000 s-1 - Melt Cutter Twin Strand (RH2200 only):
-
Die to cut distance : 100 to 160 mm
Die to Sensor distance (strand length):
150 to 210 mm (50 mm below cut)
Recommended maximum shear rate : 1000 s-1
Hardware Accessories
- Slot Die assembly:
- Slot Height 0.5 to 2.5 mm
- PVT (Pressure, Volume Temperature) System
- Nitrogen purge
Key Features and Benefits
Rigid frame design
The RH2000 series mechanics are contained within a rigid one-piece housing which gives the cantilever design extreme strength and stiffness. This is an important consideration in transient tests such as PVT, which rely upon compliance free measurement for accurate volume determination.
Swivel head design
A unique, safety interlock protected, swivel design means that the actuated part of the rheometer can be moved to one side giving complete ease of access for cleaning and sample loading.
Bi-Modal speed control
Malvern has developed a bespoke Bi-Modal digital speed control technology to control the latest generation of capillary rheometers. The technology uses different speed control algorithms suited to high and low speed operation in order to optimize performance. This gives the rheometer an impressive dynamic range in speed control. In practice, the lower limit is determined only by long experimental times at low shear rates but a dynamic range in speed of in excess of 200,000:1 is available if required. This greatly enhances the system's flexibility and means that a wider range of shear rates can be covered using a particular die.
Rosand Twin Bore Principle (RH2200 model)
Malvern was the first manufacturer to introduce the twin bore measurement principle in a commercially available rheometer unit. Simultaneous measurements can therefore be made on both long and short dies to determine the inlet pressure drop at the die, and therefore absolute viscosity, using the Bagley method. More commonly, Rosand 'zero length' dies are used to directly measure the inlet pressure drop and measure the extensional viscosity using the Cogswell method. The twin bore technique gives obvious experimental advantages including improved throughput since both experiments are preheated simultaneously. Alternatively, the software can be configured to run a two material test, thus measuring the apparent viscosity of two different materials simultaneously.
