PMI foam HF has been specially developed for radome applications. It is characterized by a lower dielectric constant and dielectric loss in the wide frequency range of 2-18GHz, with a dielectric constant of 1.05-1.13. At the same time, PMI foam HF has a lower cell size, which helps to further reduce the amount of surface resin absorption, reduce the weight of the part, and improve the wave transmittance.
For radar, radomes, miniature antennas, etc., PMI foam HF is suitable for autoclaves, RTM, VARI and most composite manufacturing processes such as molding, the molding process conditions can reach 180°C/0.1MPa.
Type | Units | 50HF | 75HF | Test Method |
Density | kg/m 3 | 50±10 | 75±10 | ISO 845 |
Compressive
Strength |
MPa | 0.83 | 1.65 | ISO 844 |
Tensile
Strength |
MPa |
1.65
|
2.20 | ASTM D638 |
Elastic
Modulus |
MPa | 75 | 100 | ASTM D638 |
Elongation
At break |
% | 2.8 | 2.9 | ASTM D638 |
Flexural
Strength |
MPa | 1.55 | 2.80 | ASTM D790 |
Shear
Strength |
MPa | 0.85 | 1.25 | ASTM C273 |
Shear
Modulus |
MPa | 28 | 45 | ASTM C273 |
Thermal conductivity | W/(m*K) | 0.030 | 0.031 | - |
Compressive
Creep |
% | ≤2.0 | GB/T 15048 | |
Bubble cell size | μm | 50-150 | ZKHT/MT-21 | |
Temperature
Resistance |
ºC | ≥200ºC | DIN 53424 |
HF | Size(mm) | Sheet thicknesses are available |
50 HF | 2500*1250 | 1-120 |
75 HF | 2500*1250 | 1-100 |
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