VESPEL® SP-21

Vespel® SP-21 is a polyimide grade formulated with 15% graphite, offering increased friction and wear resistance and a lower coefficient of friction than Vespel® SP-1. This material combines rolling and wear performance with enhanced structural rigidity and dimensional stability over a wider temperature range. Graphite improves wear resistance with a low coefficient of friction. Increased long-term thermal stability. Lubricated or non-lubricated applications where low friction and low wear are required at high temperatures. For example: bushings, segments, thrust washers, seals.

• Semi-finished product manufacturer : Dupont
• Raw material supplier : Dupont
• Minimum thermal resistance (in °C) : -273
• Maximum thermal resistance (in °C) : 550
• Mechanical resistance traction module (in MPa) : 65.5
• Mechanical resistance compression module (in MPa) : 2895
• Pressure-velocity limit (PV) : High
• Low friction and wear coefficient : Low
• Wear resistance : Good
• Electrical conductivity : Insulative
• Chemical resistance : Medium
• Polymer name : Polyimide
• Polymer abbreviation : PI
• Charge / Reinforcement : 15% graphite
• Mechanical resistance (in MPa) : Medium
• Continuous thermal resistance (in °C) : 290
• Mechanical resistance constraint compression (in MPa) : 133