NMPEF-1, NMPEF-2 and NMPEF-4 are closed-cell, cross-linked polyethylene foams. They are available in sheet form, fabricated as gaskets or thermoformed into simple or complex shapes. A denser grade is available upon request. For more detailed technical data, please contact Newmet (email).

Applications
  • Ducting insulation
  • Gap Filling
  • Gaskets
Product Features
  • 3D fabrication
  • Fire retardant
  • Low density
  • Potential for pressure sensitive adhesive
  • Thermoformable
Quality standards
  • FAR 25.853 (a)(1)(ii)
Markets
  • Aerospace
  • Industrial
  • Maritime

Typical properties

Product Property Value Test Method Footnotes
Nominal Density (kg/m3) 45 BS ISO 7214 1998
Cell size (mm) 0.4 Internal
Compression Stress-Strain (kPa) 10% compression - 69, 25% - 86, 40% - 121, 50% - 159 BS ISO 7214 1998
Compression Set (% set) 1/2 hour recovery - 8.5, 24 hour recovery - 2.5 BS ISO 7214 1998

25mm cell-cell
25% compression, 22hr, 23˚C
Compression Set (% set) 1/2 hour recovery - 20, 24 hour recovery - 11 BS ISO 7214 1998

25mm cell-cell
50% compression, 22hr, 23˚C
Tensile strength (kPa) 435 BS ISO 7214 1998
Tensile Elongation (%) 180 BS ISO 7214 1998
Tear Strength 1200 N/m BS EN ISO 8067 1995
Hardness Shore 00 60 ISO 868 1985
Recommended operating temperature range (˚C) +105 max, -70 min Internal

The maximum operating temperature shown is defined as the temperature which will typically cause a linear shrinkage of 5% after a 24 hour exposure period, using sample dimensions of 100mm x 100mm x 25mm. This figure is provided for general guidance only. The actual level of shrinkage the foam will undergo at any particular temperature is dependent on a number of system variables such as sample dimensions, cell size, loading conditions and exposure period.
Thermal conductivity (W/m.K) 0.043 ISO 8302 1991

Mean temperature of 10˚C
Flammability Complies FAR 25.853 (a)(1)(ii)