DuPont™ Vespel® SP-1

DuPont™ Vespel® SP-1 is widely used for:

  • Insulators
  • Valve seats
  • Balls
  • Gaskets
  • Poppets
  • Wafer clamping rings
  • In-chamber semi-conductor parts

Performance Characteristics:

  • Operating temps from cryogenic to 500°F (260°C)
  • Ultra-high purity
  • Minimal electrical and thermal conductivity
  • Maximum strength and elongation
  • Low outgassing
  • Improved tech uniformity
  • Excellent wear for longer life

Common Brands:

  • DuPont™ Vespel®



Authorized Distributor of DuPont™ Vespel Polyimide

DuPont™ Vespel® SP-1

Unfilled, offering superior electrical and thermal insulation properties

DuPont™ Vespel® SP-1 unfilled offers superior wear and insulation properties with operating temperatures from cryogenic to 260°C (500°F). Vespel® SP-1 has low electrical conductivity and the highest elongation and purity of the SP family. Available as stock shapes. For Vespel® SP-1 chemical resistance view our chart.

Semiconductor manufacturers often find components fabricated from Vespel® SP-1 shapes useful in production processes.

 

STANDARD SIZES
PLAQUE Dimensions:
5 in x 5 in – 10 in x 10 in
Thickness:
0.062 in – 2 in
ROD Outside Diameter:
0.125 in – 6 in
OPTIONS AVAILABLE
COLOR Brown
GRADES Unfilled

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Vespel® SP-1 is also available in ball and bar shapes.

 

Typical Properties OF DuPont™ Vespel® SP-1 Polyimide
  ASTM
Method
Units SP-1
Unfilled
Mechanical
Tensile strength
23°C (73°F)
D1708 / D638 MPa (kpsi) 86.2
(12.5)
Tensile strength
260°C (500°F)
D1708 / D638 MPa (kpsi) 41.4
(6.0)
Elongation at break
23°C (73°F)
D1708 / D638 % 7.5
Elongation at break
260°C (500°F)
D1708 / D638 % 6.0
Flexural modulus
23°C (73°F)
D790 MPa (kpsi) 3,100
(450)
Flexural modulus
260°C (500°F)
D790 MPa (kpsi) 1,720
(250)
Compressive stress at
10% strain, 23°C (73°F)
D695 MPa (kpsi) 133
(19.3)
Deformation under
13.8 MPa (2,000 psi) load
D621 % 0.14
Friction      
Coefficient of friction at
PV = .875 MPa m/s
(25,000 psi-ft/min)*
    0.29
Coefficient of friction at 
PV = 3.5 MPa m/s
(25,000 psi-ft/min)*
     
Static coefficient
of friction in air*
    0.35
PV limit (unlubricated)**   MPa-m/s
(kpsi ft/min)
 
Other Properties      
Coefficient of thermal
expansion
23–300°C (73–572°F)
E831 µm/m/K
(10-6 in/in-°F)
54 (30)
Hardness D785 Rockwell E 45–60
Water absorption
24 hr at 23°C (73°F)
D570 % 0.24

*Versus carbon steel, steady state, unlubricated, in air, thrust bearing. **PV limits for any material vary with different combinations of pressure and velocity as well as other conditions.

Need more information about this material? Use our interactive plastic properties table

The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable and falls within the normal range of properties. It is intended for use by persons having technical skill, at their own discretion and risk. This data should not be used to establish specification limits nor used alone as the basis of design. Handling precaution information is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any product, evaluation under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents.

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