ROHACELL® EC

electromagnetic wave absorp-tion at radar frequencies

ROHACELL® EC is a conductive, closed-cell foam specifically designed for stealth applications, including use in stealth aircraft and electromagnetic shielding.ROHACELL® EC is a conductive, closed-cell foam specifically designed for stealth applications, including use in stealth aircraft and electromagnetic shielding.
ROHACELL® EC features all the exceptional thermomechanical properties and strength-to-weight ratios found in traditional ROHACELL® foam, but provides the added benefits of superior dielectric properties and absorption of electromagnetic waves at radar frequencies. ROHACELL® EC features all the exceptional thermomechanical properties and strength-to-weight ratios found in traditional ROHACELL® foam, but provides the added benefits of superior dielectric properties and absorption of electromagnetic waves at radar frequencies. 
This unique combination of properties is the result of loading the ROHACELL® polymer with carbon particles during processing - making it an excellent sandwich core solution for components requiring both radar absorption properties and superior mechanical performance.This unique combination of properties is the result of loading the ROHACELL® polymer with carbon particles during processing - making it an excellent sandwich core solution for components requiring both radar absorption properties and superior mechanical performance.
Dielectric properties
Property
Frequency [GHz]
ROHACELL® 71 EC
ROHACELL® 150 EC
Real part of permittivity
5
1.44
1.83
10
1.33
1.62
20
1.25
1.68
30
1.28
1.52
Imaginary part of permittivity
5
0.18
0.41
10
0.12
0.30
20
0.14
0.24
30
0.10
0.20
Scattering Parameters determined using transmission/ reflection/ method (waveguide and Vector Network Analyzer).
Permittivity determined using Nicholson Ross Weir algorithm.
Single measurement based values.
Efficient Processing
ROHACELL® EC can withstand the most demanding curing and processing conditions up to 180°C and 7 bars depending on material density. It is compatible with all common curing processes including vacuum infusion, resin transfer molding, pre-preg autoclaving, as well as hand lay-up.
 
Notice : Evonik is aware of its product resonsibility to the global community and takes reasonable care in the distribution of its products. ROHACELL® EC purchase and usage may require a license and proof of end user application. This product is:
  • Subject to EEC regulation 428/2009 (Dual Use Regulation) annex I 1C101
  • Subject to EEC regulation 1334/2000 annex IV, a EEC domestic export license is required
NOTE : United States customers purchasing from a US supplier are not subject to the above listed EEC regulations.