materials
Specialty-filled polyimide
Specialty-filled polyimide covers application-specific formulations that standard graphite-filled or unfilled grades do not: MoS₂-filled materials for vacuum and inert-gas wear, and conductive grades for electrostatic charge removal. Material is matched to the duty, not to a catalog color.
Application-specific formulations
Specialty-filled polyimide is not one material. MoS₂-filled grades target friction and wear in vacuum or inert-gas environments. Conductive grades target electrostatic charge removal combined with low wear. Other formulations modify friction, wear, or thermal behavior for a specific duty.
- MoS₂-filled formulations for vacuum and inert-gas wear
- Conductive formulations for electrostatic charge removal
- Fluoropolymer-modified formulations for low friction
- High-temperature capability and dimensional stability
Dominion equivalent grades
Dominion offers specialty-filled polyimide equivalent or alternative grades corresponding to commonly specified Vespel® SP-3 (MoS₂-filled, for vacuum or inert-gas friction and wear) and SP-202 (conductive, for electrostatic charge removal and low wear) materials. Equivalency is evaluated against the specific application, not claimed as a drop-in.
Questions engineers ask
Short answers
Is every filled polyimide graphite-filled?
No. DuPont identifies Vespel® SP-3 as filled with molybdenum disulfide (MoS₂) rather than graphite, SP-211 as graphite plus fluoropolymer, and SP-202 as a conductive specialty-filled grade. The filler decides the family.
When is a specialty-filled grade the right answer?
When the environment rules out the standard families — for example dry friction in vacuum or inert gas, or a part that must dissipate electrostatic charge while resisting wear.
