High-frequency precision for advanced antenna applications
ROHACELL® 71 HF
At 75 kg/m³, ROHACELL® 71 HF is the densest of the 3 grades in the ROHACELL® HF range.
ROHACELL® HF is a closed-cell rigid foam based on polymethacrylimide (PMI) chemistry completely free of CFC’s. With its extremely low dielectric constants and particularly favorable transmission properties at high frequencies, ROHACELL® HF is ideal for use in antenna applications.
Mechanical properties
- Density
- 75 kg/m³
- 4.68 lbs/ft³
- Compressive Strength
- 1.5 MPa
- 218 psi
- Tensile Strength
- 2.8 MPa
- 406 psi
- Shear Strength
- 1.3 MPa
- 189 psi
- Elastic Modulus
- —
- Shear Modulus
- 29 MPa
- 4,206 psi
- Strain at Break
- 4.5 %
Compare ROHACELL® HF grades
Properties
Density
32kg/m³
2.00lbs/ft³
52kg/m³
3.25lbs/ft³
75kg/m³
4.68lbs/ft³
Compressive Strength
0.3MPa
44psi
0.7MPa
102psi
1.5MPa
218psi
Tensile Strength
1MPa
145psi
1.9MPa
276psi
2.8MPa
406psi
Shear Strength
0.4MPa
58psi
0.8MPa
116psi
1.3MPa
189psi
Elastic Modulus
—
—
—
—
—
—
Shear Modulus
13MPa
1,885psi
19MPa
2,756psi
29MPa
4,206psi
Strain at Break
—
4%
4.5%