Keyboard PU Foam Sheets
Fabric over foam EMI gaskets, specification
compression deflection: smaller than 1 lb/in 15-19 percent
compression set: 15% at 21 degree; 19% at 70 degree centigrade
service temperature: -40 to 70 degree centigrade
electrical resistance: less than 0.05 Ohms/Sq
shielding effectiveness: more than 85dB attenuation from 20 MHz to 10 GHz