N normal force between the surfaces n lb there are at least two types of friction forces.
Silicone rubber coefficient of friction.
50 decrease in the coefficient of friction when coated silicone samples vs.
A value of zero would mean no friction at all an elusive property.
Dry steel dry steel 0 70 0 57 0 80.
It can be applied using conventional coating methods.
Static cof kinetic cof 0 0 2 0 4 0 6 0 8 1 1 2 r 2182 substrate.
Bowden tabor the friction and lubrication of solids oxford.
The friction force is the force exerted by a surface when an object moves across it or makes an effort to move across it.
Nusil technology experts recently conducted a study to evaluate the static and kinetic coefficient of friction of coated versus non coated silicone surfaces.
Steel is about 10.
F f μ n 1.
Static friction is friction between two or more solid objects that are not moving relative to each other.
Compared to steel silicone rubber is 2 to 7 times greater.
The friction values used in the material interaction table are generalized values based on the following references.
Silicone is naturally quite tacky with a coefficient of friction of approximately 1 0 in many cases.
The texture can be used to reduce the co efficient of friction.
Values outside this range are rarer but teflon for example can have a coefficient as low as 0 04.
A liquid silicone rubber top coat can be used to improve surface friction of silicone elastomer parts.
For example static friction can prevent an object from sliding down a sloped surface.
F f frictional force n lb.
Rubber in contact with other surfaces can yield friction coefficients from 1 to 2.
μ static μ s or kinetic μ k frictional coefficient.
70 durometer liquid silicone rubber 74 reduction 54 reduction uncoated coated uncoated coated revised 04 2013 nusil technology llc.
The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction.
Dry rubber dry steel 0 80 0 76 0 95 dry rubber greasy steel 0 80 0 76 0 95.
Most dry materials in combination have friction coefficient values between 0 3 and 0 6.
The rubber static friction coefficient μ s contributes e g to the grip of tyres shoes and windshield wipers even though research is often focused on the sliding dynamic friction coefficient μ d the μ s is not purely a material property of contacting surfaces because it depends on the load temperature loading conditions and lubrication 1 2 3.
The frictional force can be expressed as.
The relatively high coefficient of friction of silicone elastomers can limit the range of applications of these materials.
Non coated silicone samples are compared side by side.
The force it takes to initiate movement between the silicone rubber and a steel panel static cof was measured as well as the force needed to keep the silicone rubber moving against.
On many of our products processes are applied to reduce the coefficient of friction.
