Non-wovens of electret fiber mixtures having an improved charge stability
AssigneeHoechst Aktiengesellschaft
InventorsJorg Dahringer, Ernst-August Albers, Werner Groh, Achim Heyer
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Abstract
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.
Claims16
A non-woven fabric of electret fibers having an improved charge stability and comprising materials which chiefly comprise a fiber-forming polymer obtained by polymerization or polycondensation, and 0.01 to 30% 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 fibers which are made of different materials and wherein these materials differ from one another in that they comprise different fiber-forming addition or condensation polymers.
Dependencies are inferred from the claim text.