Polyimide (PI) is one of the organic polymer materials with excellent comprehensive performance. It has the characteristics of high insulation, fatigue resistance, high temperature resistance, abrasion resistance, impact resistance, low noise and long service life.
Figure 1. SEM micrographs of fractured surfaces of PTFE and PI filled PTFE 
Table 1. PI filled PTFE composite material performance parameter reference
|Medium filled PI/PTFE|
|Shore hardness D||65|
|Chemical property||Not resistant to alkali and hot concentrated acids, nor resistant to hydrolysis|
|Tensile strength (MPa)||15.5|
|Elongation at break (%)||290|
|Coefficient of friction||0.2|
|Wear rate||3.0×10^-6 mm3(N·m)^-1|
Note: The above data is for reference only. The actual product in use may vary due to different parts size, raw material batch type, and mechanical working conditions. In addition, the filled PTFE is a multi-element composite material, and the proportioning composition can be adjusted according to the actual working conditions of the customer, which is not fixed.
Figure 2. Friction coefficient and wear rate of PTFE and its composites under seawater lubrication 
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