FRICTION is a phenomenon
that is part of our daily lives - in one sense we would find most
difficult to survive without it yet in another it can be most
expensive to minimise. It can be simply identified as the resisting
force that arises when one surface slides, or tries to slide, over
another. It is commonly the textural property measured from packaging
materials, shaving gels, cosmetic sponges, etc.
Friction can be a limitation to
us, for example, the friction of packaging can be a major limiting
factor in the speed of packing machines. Additives are often used to
improve the lubricity of surfaces; this is known as 'slip'. Polythene
is added to packaging to improve slip characteristics.
We recognise that there are two
reactions due to friction that we can define. There is 'static friction'
(sometimes shortened to 'stiction'), that is the resistance to
start relative movement and there is 'kinetic' or 'moving friction'
that is the resistance to maintain the movement at a specific
constant speed. The Texture Analyser can also measure a coefficient
of friction which is an empirical measurement. Rougher surfaces tend
to have higher values.
properties that can be obtained from a texture analysis graph:
Stiction, Friction, Coefficient
The above are only typical
examples of friction force
measurement. We can, of course, design and manufacture probes or
fixtures that are bespoke to your sample and its specific measurement.
Once your measurement is
performed, our expertise in its graphical interpretation is
unparalleled no-one understands texture analysis like we do.
Not only can we develop the most suitable and accurate method for the
testing of your sample, but we can prepare analysis procedures that
obtain the desired parameters from your curve and drop them into a
spreadsheet or report designed around your requirements.
Texture Analyser graph with
To discuss your specific test
here to email us.
We can all feel
it; let us show you how to measure it
click on the video to see an overview of Texture Analysis and
the properties it can measure...