A300-HEMP Shielding fleece according to military standard MIL-STD-188-125
A300-HEMP is a stable fleece that is laminated on both sides with a thick micro-needled aluminum foil.
This provides redundancy and material thickness to meet the military standard MIL-STD-188-125. This military standard for protection against very strong electromagnetic pulses (High Altitude Electromagnetic Pulse = HEMP) serves to protect critical infrastructure facilities.
This standard does not only include minimum shielding of high-frequency fields, but also magnetic fields from 1 kHz. The material is produced in-house in Germany.
The micro-needling punctures the material 4000.000 times per square meter, making it highly permeable to water vapour. The micro-holes are so small that they have no effect on the sensational 123 dB shielding attenuation.
The high water vapour permeability is a novelty, as two very thick aluminum foils are normally just glued on top of each other to reach MIL-STD-188-125.
​
Click here for data sheet and application
​​
Shielding attenuation to MIL-STD-188-125
The conformity of this product with MIL-STD-188-125 has been tested by the accredited laboratory EMCC DR. RASEK accredited laboratory.
This product meets the minimum shielding requirements for magnetic fields from 10 kHz to 10 MHz and high-frequency fields from 10 MHz to 1 GHz.
In addition, the high-frequency fields from 1 GHz to 40 GHz were determined in accordance with ASTM D4935-10.
​
Processing
Substrate: absorbent and chalky substrates must be pre-treated with our GK5 primer.
Bonding: no cellulose adhesive adheres to aluminum; we recommend our PSA pressure-sensitive adhesive, which creates a self-adhesive surface (very good adhesion with wet and dry installation).
Overlap: the sheets must be glued with a 5 cm overlap. The edges of the sheets must also be sealed with our shielding tape HNX100.
Contact materials: Due to the aluminum layer, a neutral pH value of pH 4-9 must be ensured for all direct contact materials during processing.
​
Grounding
​This product with an electrically conductive surface has to be integrated into the functional-equipotential bonding (FEB). Please find suitable grounding accessories under "Other products".
​
Documentation
​Expert report HEMP (MIL-STD-188-125)
Expert report attunation (ASTM D4935-10)
Laboratory report attenuation (ASTM D4935-10)
​
​
