Vespel®Polyimide PI Sheet & Rod

Key Properties

● Good thermal stability
● Good chemical resistance
● Excellent mechanical properties
● Low creep and high tensile strength
● Very good heat resistance
● Resistance to weak acidity

Applications
● Mechanical stress damper
● Semiconductor test components, processing nesting (nest)
● Microelectronic IC test socket (socket) and contactor
● Seals, pumps and valve assemblies, bearings and bushings
● Scientific instrument parts, other electronic components
● Insulation and passivation layers and MEMS chip fabrication in digital semiconductors
● Bushings, bearings, sockets or structural parts of demanding applications

Vespel® Grades and Colors

Vespel® SP-21
For Vespel® SP-21, 15% graphite by weight is added to the base resin for increased wear resistance and reduced friction in applications such as bearings, thrust washes, bushings, seal rings, slide blocks and other wear surfaces. Vespel® SP-21 has the highest mechanical properties of the graphite-filled grades.

Vespel® SP-22
For Vespel® SP-22, 40% graphite by weight is added to the base resin for enhanced resistance to wear and friction and good dimensional and oxidative stability. Vespel® SP-22 has the lowest coefficient of thermal expansion of the graphite-filled grades. Typical applications are the same as those for Vespel® SP-21.

Vespel® SP-211
For Vespel® SP-211, 10% Teflon® (PTFE) and 15% graphite by weight are added to the base resin for the lowest coefficient of friction over a wide range of operating conditions. Vespel® SP-211 also has excellent wear resistance up to 300° F. Typical applications include sliding or linear bearings as well as many of the wear and friction applications for which the other Vespel® grades are suitable.

Vespel® SP-3
For Vespel® SP-3, 15% molybdenum disulfide by weight is added to the base resin for wear and friction resistance in vacuum and other moisture-free environments where graphite actually becomes abrasive. Typical applications include seals, bushings, bearings, gears and other wear surfaces in outer space and in ultra-high vacuum or dry-gas environments.

Cylex® PI350
Cylex® PI350 material is a combination of polyimide PI and 15% graphite, which improves the wear characteristics and heat resistance of the material. Suitable for bearings, thrust washers, bushings, seals, sliders and other wear applications.

Cylex® PI350GP
Cylex® PI350GP is a polyimide PI with 15% graphite and 10% PTFE filled for excellent wear resistance with the lowest coefficient of friction under all operating conditions. Typical applications include sliding or linear bearings as well as many of the wear and friction applications listed above.