Mat for removing dirts or dusts

摘要

A mat for removing dirts or dusts comprises a cushioning material made of a plurality of curled elastomeric filaments and a collector sheet of electret laying under the cushioning material. The filaments are formed of a compound of synthetic resinous material and a powdered electrical conductive material, and entangled with each other to provide a plurality of through holes or voids extending vertically through the cushioning material.