Triboelectric charging of wovens and knitted fabrics
AssigneeTesa SE
InventorsAndreas Schroder, Claus Grobe, Jens Kranz, Dieter Wenninger
Life of this patent
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Abstract
A method for the utilization of a woven or loop-formingly knitted fabric which acquires an electrostatic charge as a result of a specific treatment for filtering airborne, dusty allergens such as pollen in a pollen guard mountable in front of windows and doors over the whole area thereof.
Claims8
A method for filtering airborne allergens from passage through an open window or door to a living space which comprises covering the opening of said window or door with a rechargeable electrostatic fabric filter having light and air transmitting openings, wherein the filter is formed by woven or loop formed threads which have openings therebetween, said openings having a diameter of greater than 20 μm and an area of between 300 and 90,000 μm2, said threads having diameters of between 50 and 1,000 μm and being comprised of a triboelectric material which is electrostatically chargeable by frictional engagement of the threads with a moving other material and said filter having a surface resistance of between 1012 and 1015 ohms.
In a building having an opening to the exterior of said building, the improvement which comprises a covering over said opening comprised of a rechargeable electrostatic fabric filter having light and air transmitting openings, wherein the filter is formed by woven or loop formed threads which have openings therebetween, said openings having a diameter of greater than 20 μm and an area of between 300 and 90,000 μm2, said threads having diameters of between 50 and 1,000 μm and being comprised of a triboelectric material which is electrostatically chargeable by frictional engagement of the threads with a moving other material and said filter having a surface resistance of between 1012 and 1015 ohms.
A rechargeable electrostatic fabric filter having light and air transmitting openings, formed by woven or loop formed threads which have openings therebetween, said openings having a diameter of greater than 20 μm and an area of between 300 and 90,000 μm2, said threads having diameters of between 50 and 1,000 μm and being comprised of a triboelectric material which is electrostatically chargeable by frictional engagement of the threads with a moving other material and said filter having a surface resistance of between 1012 and 1015 ohms.
Dependencies are inferred from the claim text.