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Polytetrafluoroethylene sliding speed

The coefficient of friction increases with increasing sliding speed up to about 150 ft/min, while beyond this point, the sliding speed has very little effect. Polytetrafluoroethylene filled with molybdenum disulfide has a coefficient of friction lower than for pure polymer under the same conditions. The decrease is attributed to the increased hardness of the... [Pg.484]

Figure 13-10. Wear of polytetrafluoroethylene against glass. (a) Course of wear at 50 C, 9.81 N load. (b) Influence of sliding speed on wear rate. Data by Tanaka, Uchiyama and Toyooka [20]. Figure 13-10. Wear of polytetrafluoroethylene against glass. (a) Course of wear at 50 C, 9.81 N load. (b) Influence of sliding speed on wear rate. Data by Tanaka, Uchiyama and Toyooka [20].
Polytetrafluoroethylene s coefficient of friction rises quickly with sliding speed (below 30 m/min. Fig. 3.26), which prevents slipstick behavior. No noise takes place even at slow speeds. Above 45 m/min, sliding velocity has little effect at combinations of pressure and velocity before the PV limit of PTFE is reached. Figure 3.27 indicates that static coefficient of friction decreases with increase in pressure. [Pg.36]

Polytetrafluoroethylene (PTFE, or Teflon) is reported to resist friction welding to other polymers even at high speeds and pressures [24]. PTFE has a much lower coefficient of friction and relatively higher softening point among the polymers. To reach the necessary conditions to weld it, sliding speed and pressure should be increased by a factor of 50 and 20 in comparison with high-density polyethylene [19]. [Pg.606]

Plastics. Almost all commercial plastics find some use both dry and lubricated for sliding at low speeds and light loads the most commonly used thermoplastics are nylon, acetal resins, and polytetrafluoroethylene (PTFE). Typical thermosetting resins for bearing appHcations are phenoHcs, polyesters, and polyimides. Table 8 compares the characteristics of plastic bearing materials with those of graphite, wood, and mbber which find use in somewhat similar appHcations. [Pg.6]


See other pages where Polytetrafluoroethylene sliding speed is mentioned: [Pg.364]    [Pg.6]    [Pg.6]    [Pg.72]   
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