ELECTROMAGNETIC WAVE SHIELD MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide electromagnetic wave shield material which is excellent in shielding performance to electromagnetic waves over a wide frequency band and whose ventilation resistance loss is small. SOLUTION: This material is constituted of nonwoven fabric 0.5-3mm thick having a bulk density of 0.05-0.008g/cc made of curled carbon fiber having a diameter of 5-20μm and a length of 5-25mm which is coated with a metal film of 25-300g/m<2> . The numerical aperture is set larger than or equal to 90%.