Non-wovens of electret fiber mixtures having an improved charge stability

摘要

A non-wovens fabric of electret fibers having an improved charge stability and comprising materials which chiefly comprise a fiber-forming addition or condensation polymer and 0.01 to 30% by weight (preferably 0.01 to 10, in particular 0.1 to 5, % by weight), based on the weight of the material, of organic or organometallic charge control agents, wherein the non-woven fabric comprises at least two types of electret fiber which are made of different materials which differ from one another in that they comprise different fiber-forming addition or condensation polymers and if appropriate also different charge control agents is described.