Fact or Friction – Fiction

15/09/2016 14:45:59

In this post we explore the impact that friction has on skin when seated in a medical support surface.
Friction definition 
‘The resistance that one surface or object encounters when moving over another’ 
[Oxford dictionary, http://www.oxforddictionaries.com/definition/english/friction]
For example, there is a danger that friction forces can damage vulnerable skin when a patient is moving across a medical support surface.
Dartex fabrics are engineered to keep friction to a minimum; protecting the skin from friction damage.
Difference between static and dynamic friction
Dynamic friction (often referred to as Kinetic friction) is the force that has to be overcome between two surfaces in order to keep the movement working.
Static friction is the force between two surfaces that has to be overcome in order for movement to occur.
Measuring friction
Coefficient of friction (cof) is normally measured by using specialist equipment measuring the forces as two surfaces move across each other. This can be particularly difficult to assess in medical support surfaces as the patient tends to sink into the surface.
The relationship between friction and shear
Where friction is present, shear forces are present too. However you can still get shear forces acting on tissue without friction.
Talk to Dartex
If in doubt, ask our technical experts for more information. Contact enquiries@dartexcoatings.com.

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