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Low the electret fiber and the filter web which possess the extractable hydrocarbon of level
Low the electret fiber and the filter web which possess the extractable hydrocarbon of level
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机译:低驻极体纤维和过滤网,它们具有一定水平的可萃取烃
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摘要
A method of making electret fibers, which method comprises the steps of:blending a polymeric material with a fluorochemical additive compound;extruding the blend at a temperature maintained below 290° C. to form extruded fibers; andannealing and charging the extruded fibers;wherein the polymeric material and extrusion conditions are selected such that the resulting fibers have a level of extractable hydrocarbon material that is less than about 3.0 weight percent based on the weight of the fibers.
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