Gammadot Rheology Testing & Consultancy Services
Unit 5C, Leaton Ind. Estate, Shrewsbury. Shropshire. SY4 3AP
Tel: 01939 291677 • Fax: 05600 753945 • Email: enquiries@gammadot.com

Celsum Technologies Limited has supplied a top-of-the-range ACR 2100 capillary extrusion rheometer to Gammadot thus increasing our capacity to provide viscosity measurements over a wide range of temperatures and shear rates.

A capillary extrusion rheometer is a very accurately controlled piston-driven extruder which allows the test material to be expressed at a series of user-defined speeds through precision engineered orifices or dies, and the pressure generated at each speed is recorded. The characteristic graph or rheogram is useful for predicting processing behaviour and may also be used to deduce information about the specimen’s chemical and physical nature. As such, it is an extremely useful tool for analyzing and trouble-shooting processing problems.

Said Roy Carter, MD of Celsum, “We are extremely pleased to be able to help Gammadot to enhance their established range of rheological testing services with the addition of this fine instrument. The ACR 2100 rheometer has a maximum pressure capability of 30,000 psi (2100 bars) and maximum temperature of 450°C, allowing many types of materials to be tested under realistic processing conditions. As well as shear viscosity, the ACR 2100 may be used to determine extensional viscosity, pressure coefficient of viscosity, no-flow temperature, and other process relevant parameters.”

Mark Edwards, Principal of Gammadot said, “I am delighted that we have a new capillary rheometer to add to our current suite of test equipment. This will expand the range of contract research and testing services that we can offer our customers, and will greatly assist our development”.

In last November's newsletter we announced that Gammadot's Monsanto R100 oscillating die cure rheometer was to be fully refurbished to include the replacement of the original chart recorder with a bespoke PC-based data logger system. Work began in January and phase one of the software is written with plans to complete programming & calibration / commissioning of the kit within the next quarter.

Our expertise is based primarily in the rheological characterisation of elastomers and thermoplastic melts, although we have experience with many other materials covering: bitumens, industrial sealants, oils, greases, paints, PVA, hot melt adhesives and food additives to name but a few!

We also have many years experience in providing materials characterisation data support for proprietary flow simulation software packages such as Moldflow, Sigmasoft 3D and the now discontinued Fillcalc & C-Mold systems.

A brief summary of our key measurement services includes: