gradient column method

density of plastics – gradient column method

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gradient column method

gradient column method

One of the most accurate methods to determine the density of plastics and rubbers in kg/m3 is the gradient column method (ISO 1183-2). The principle of the method is that two miscible liquids can be mixed at a control mixing rate and temperature into a tube so that a uniform density gradient is formed from the top to the bottom of the tube. Calibrated floats with known density are then immersed in to the tube for reference.

At impact we are accredited by UKAS for this test and we are equipped with a state-of-the-art three column automatic density gradient from Ray-Ran, UK.

why impact?

Some members of impact’s team have over 30 years of polymer experience, with over 120 years combined, and are internationally regarded as product experts including sitting on various CEN committees and being a notified body for construction products (Note because of our notified body status we cannot undertake consultancy on oil storage tanks), we can often identify potential sources of weakness in products without even undertaken testing using our experience.

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