Capillary Rheometry Units RH7 and RH10

Advanced, powerful floor standing capillary rheometry units suitable for research and product development.

Since its launch, the Rosand RH7 has set new standards in research level capillary rheometry. Today, the Rosand RH7 is used in several hundred research laboratories around the world for a range of applications including polymers, foods, coatings and ceramics.

Malvern has continuously developed the original RH7 design and its operating software to produce a new generation of floor standing capillary units with market leading performance characteristics and capabilities. The RH7 and RH10 retain much of the robust 'H' frame design principle, which lies at the heart of the instruments' ability to operate under high loading conditions. A new digital drive system, gives the RH7 and the RH10 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.

		RH7	RH10

Drive Force :	50kN
Drive Force :	100kN

Frame Stiffness:	250kN

Drive Speed Maximum:	600mm/min
	1,200mm/min

Dynamic Speed Range:	400,000:1

Temperature Range:	Ambient to 400ºC, 500ºC Option, twin bore barrel
	Low temperature cooling coil Option. Min temperature 10ºC, twin bore
	Low temperature liquid Nitrogeb Option. Min temperature -40ºC, single or twin bore.

Bore Diameter:	15 mm Standard, 9.5, 2, 19 & 24 mm bore options

Barrel Bore Length:	280mm

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 Bagley Correction by Orifice Die and Extrapolation Methods
	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:	Resolution 10 microns

Dual Axis Laser Die Swell:	Resolution 10 microns

Single Axis High Resolution Laser Die Swell:	Resolution 1 micron

Dual Axis High Resolution Laser Die Swell:	Resolution 1 micron

Die & Melt Cutters

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:	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

Haul Off/Melt Strength System:	Haul off motor/nip roller speed range : 2000 m/min max Dynamic speed range > 100,000:1 Precision balance 2N capacity, 0.0001N resolution Haul off die dimensions - 2.0mm (D) x 20mm (L) x 180° (Entrance angle)

Haul Off Post Extrusion Oven Option:	Temperature range - ambient to 300°C

Nitrogen purge