Plastic friction coefficient

Measurements are usually made material surface against itself, with a lower friction coefficient indicating a lower resistance. The coefficient of friction between two materials in relative sliding may depend on contact pressure, surface roughness of the relative harder contact surface, temperature, sliding velocity and the type of lubricant whether the level of contamination. What is the coefficient of friction for rubber on plastic? Friction coefficients , table.

What-is-the-coefficient-of-friction-for-ru. Seiten Diese Seite übersetzen What kind of rubber?

At what ambient pressure? Is this in atmosphere, water, vacuum, some other environment? Is the rubber subject to other forces?

Stretche compressed …) In other words, the question c. In addition, some studies pointed out that the static friction decreases with the load and surface roughness. A study of the static and quasi-dynamic friction coefficient of three thermoplastics. In the case of thermoplastics the mating part is normally steel. When multiplying the co-efficient of friction by the perpendicular force between the two mating sliding faces, this result is the force .

A number in parentheses indicates the year of last . The coefficient of friction (COF) is define the test method for plastics is desribe and examples of low friction lubricants and applications such as bearings or slide plates are given. Test have also show that a suitable combination of materials and texture decrease the coefficient of friction and wear. Finally recommendations for further work are discussed. Keywords: Tribology, Polymers , Wear, Low friction polymers , Contact . Extreme care is needed in using friction coefficients and additional independent references should be used.

For any specific application the ideal method of determining the coefficient of friction is by trials. A short table is included above the main table to illustrate how the coefficient of friction is affected by surface films. Insects can walk on windows.

If friction is independent of surface roughness, why do tires have tread? Teflon has such a low coefficient of friction that it often peels off of pots and pans. Use wooden or plastic utensils. How do you get it to stick?

It is also important that a high temperature plastic wear material have a relatively low coefficient. Plastic materials work well in applications where friction resistance is important. It is quantitatively described by dynamic and static coefficients.

These provide an estimate of energy requirements for moving a part. The lower the coefficient of friction , the .

Starting from (1) and neglecting the contribution of plastic dissipation, the coefficient of friction μ of a polymer sliding against a smooth surface can be expressed as where the factor of proportionality depends on several factors including the shape and distribution of the asperities and the bulk properties of . After reviewing the links referenced above you should be able to conclude the friction coefficient for typical plastics on concrete is roughly half the value for dry and clean rubber on concrete, as summarized in the following table. There is a fundamental difference between dry friction of metals (Fig. 16-3) where the friction goes down with velocity, and dry friction of a metal on soft plastics (Fig. 16-4a) where the friction coefficient increases with the sliding velocity.

Abstract Currently, plastic pipes are beginning to be more used because of its low cost, easy installation, flexibility, durability, low weight, etc. However, this kind of pipes may have a friction coefficient sensitive to variations of flow and temperature, which can affect in the design of an analytic leak diagnosis system. This can affect product efficiency and decrease performance, resulting in increased part .