Polyimide and polyetheretherketone parts, wear-resistant bushings

Commonalities and differences between PI rods and PEEK rods

PI rod and PEEK rod commonalities and differences:

Commonalities: First of all, these two materials are polymer high temperature resistant special plastics, are very in the aerospace, aviation applications in the field of high-end plastics. With high temperature resistance, good strength, high toughness, acid and alkali resistance, friction resistance, can withstand high load environment work, in the machining performance of the two materials have good turning performance, can be processed into precision mechanical parts; and can be in the environment without oil lubrication, even under the pressure of 1.82 MPA, have shown very superior self-lubrication and anti-friction properties.

The difference: first of all, the temperature resistance of PEEK rods is not as good as PI rods, because the glass transition temperature of PEEK is relatively low compared to PI, PEEK only 150 degrees, while PI (thermosetting) can reach a staggering 370 degrees, so the material glass transition temperature, determine the ability of the material to withstand temperature; in terms of insulation damage, peek's insulation coefficient is only In terms of the degree of insulation damage, peek's insulation coefficient is only 15 times 10, the voltage resistance is only 30KV, while PI can reach 17 times 10, the degree of voltage damage to reach more than 80KV; in terms of mechanical strength, PEEK is slightly weaker than PI, especially to pressure cases of friction, PI performance is much superior; again, the price of PEEK is much cheaper than PI, peek is a thermoplastic engineering plastics, raw materials The process of synthesis, the production of profiles and in popularity are much easier and more widespread than PI, PI materials have a lower market share than peek, which is the cost of using the material occupies a large factor.