The RHEOGRAPH 25E was specially developed for use in cleanrooms and is based on our proven high-pressure capillary rheometer.

The versatile device can be used to determine viscosity and as a RAM or stem extruder for the production of strand-shaped products - for example for implants made of biodegradable plastics as drug carriers.
 

Why a RAM extruder instead of a screw extruder? 

The RAM extruder uses the platform of a capillary rheometer, an established testing device in the polymer industry. High-precision temperature control creates stable conditions in the reservoir and the material is heated gently and evenly, without the undesirable shear heating that can occur with continuous extruders.

The constant speed die ensures a uniform diameter of the extrudate, which screw extruders often cannot guarantee. The batch process minimizes rejects and material losses and enables the processing of very small quantities, such as temperature-sensitive medicines, from 100 ml per extrusion cycle.

• Processing of very small quantities of material
• Precise volume output thanks to piston/channel die system
• Virtually residue-free material utilization
• Minimal shear heating
• Easy cleaning by removing the test chamber
• Easy documentation and tracing of individual charges
• Simple integration of threshold value measurement and cut-off device
• Installation in RABS or isolators possible

• Complete stainless steel design for operation in clean rooms, class A
• Punch speed from 0.00004 to 40 mm/sec over the entire force measurement range of 25 kN
• Test channel diameter 20 mm, others on request
• Temperature control from +30 °C to +250 °C
• Measurement mode “constant speed” or “constant force”
• Measurement of piston force, calculation of viscosity
• Parameterization, control and measurement with LabRheo software, evaluation via WinRheo II software
• SKRIPT control for freely definable automatic measurement and production sequences