Methods and standards for measuring the coefficient of friction

The coefficient of friction is an important parameter
for studying the loss of frictional materials.

The coefficient of friction, also known as smoothness, is the ratio
of the friction force between two surfaces and the vertical force acting on one of them.

It is related to the roughness of the surface, but not to the size of the contact area
.

According to the nature of the movement, it can be divided into dynamic friction coefficient and static friction coefficient
.

The friction coefficient is the basic parameter
that reflects this friction phenomenon.

Here are several methods
for determining the coefficient of friction of planar materials.

First, the friction coefficient measurement method 1, planar special friction coefficient meter This instrument principle is designed according to the film or sheet friction coefficient test standards, but not limited to thin films or sheets, has been widely used in glass, film, rubber, paper, metal materials, coatings and other industries
.

Taking the MXD-02 friction coefficient instrument produced by Jinan Saicheng Technology Co.
, Ltd.
as an example, the test principle is that the two test surfaces are placed flat together, and under a certain contact pressure, the two surfaces move relative to each other to record the required force
.

The coefficient of friction is divided by the gravity of the slider by the force tested
.

This process can change the coefficient of static friction and the coefficient of
dynamic friction.

It should be noted that the coefficient of friction refers to the coefficient of friction between two materials, and if different materials are replaced with the same material, the coefficient of friction may be different
.

This kind of instrument test is highly accurate and professional, and it is also a way
used by most users.

2.
The pendulum friction coefficient instrument pendulum instrument is based on the potential energy loss of the pendulum equal to the work
done by overcoming the friction of the road surface when the rubber sheet installed at the end of the swing arm slides across the road surface.

This method is mainly applicable to asphalt pavement, plastic site, marking lines, etc
.

Experimental objective To measure the anti-slip performance of pavement and pavement material events in a wet state by measuring the anti-slip value
of the pavement.

3.
The friction coefficient tester will clamp the strip test sample with a clamp, and wrap the slider with the sample to be tested, and then place the slider on the hanging hole of the sensor, under a certain contact pressure, drive the rack through the motor to make the sensor move, that is, to make the two test surfaces move relatively
.

The force signal measured by the sensor is amplified by the integrator and fed into the recorder, while the dynamic friction coefficient and the static friction coefficient
are recorded separately.

Second, the relevant standards for measuring the friction coefficient are mainly based on the following standards: ASTMD1894, ISO8295, TAPPI816, GB/T10006 plastic film and sheet friction coefficient determination method