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Vespel® SP1 Polyimide Sheet
Available Configurations
Properties common to all products in this list
Vespel® SP1 Polyimide Sheet is a high-performance material known for its thermal stability (up to 300°C), mechanical strength, and chemical resistance. It is used in aerospace, automotive, and electronics applications to form seals, gaskets, and electrical insulators. This film withstands extreme temperatures and harsh environments, maintaining structural integrity under stress, making it attractive for demanding engineering and research applications. It is ideal for applications in space systems and high-performance electronics, where durable materials are used for long-term operation. In laboratories, Vespel® SP1 is used in NMR probe assemblies for non-RF components due to its magnetic neutrality and vacuum compatibility. In metrology, its low coefficient of thermal expansion (CTE) and creep resistance make it ideal for interferometer stages and coordinate measuring machine (CMM) fixtures.
Starting at
$264.00
each
No Minimum order
Free technical support
*Free delivery worldwide
Material Properties
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Poor |
| Acids - dilute | Fair |
| Alcohols | Poor |
| Alkalis | Poor |
| Aromatic hydrocarbons | Good |
| Greases and Oils | Good |
| Halogenated Hydrocarbons | Good |
| Halogens | Fair |
| Ketones | Good |
Mechanical Properties
| Element | Value |
|---|---|
| Coefficient of friction | 0.42 |
| Hardness - Rockwell | E52-99 |
| Elongation at break( % ) | Aug-70 |
| Tensile modulus( GPa ) | 2.0 – 3.0 |
| Izod impact strength( J m⁻¹ ) | 80 |
| Tensile strength( MPa ) | 70-150 |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 3.4 |
| Dissipation factor @ 1kHz | 0.0018 |
| Dielectric strength( kV mm⁻¹ ) | 154 – 303 |
| Surface resistivity( Ohm/sq ) | 10¹⁶ |
| Volume resistivity( Ohmcm ) | 10¹⁸ |
Physical Properties
| Element | Value |
|---|---|
| Flammability | V0 |
| Radiation resistance | Good |
| Refractive index | 1.66 |
| Resistance to Ultra-violet | Poor |
| Limiting oxygen index( % ) | 53 |
| Water absorption - over 24 hours( % ) | 0.2-2.9 |
| Density( gcm⁻³ ) | 1.42 |
Thermal Properties
| Element | Value |
|---|---|
| Heat-deflection temperature - 1.8MPa( C ) | 360 |
| Lower working temperature( C ) | -270 |
| Upper working temperature( C ) | 250-320 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1090 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.1-0.35@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 30-60 |
Tolerances
Foil
| Thickness | ±20% |
|---|