FILTER BASE MATERIAL FOR MASK, AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a filter base material for a mask, which exerts both collection efficiency using a charging technology and a heating or heat-insulating function, and which is excellent in workability.SOLUTION: In a filter base material, frictionally-electrified fibers and a dense heat-insulating layer made of hygroscopic heating fibers are entangled and integrated together. A penetration part, from which the above frictionally-electrified fibers protrude, is provided from one surface side of the above heat-insulating layer to the other surface side thereof. The frictionally-electrified fibers are arranged on both the surface sides.SELECTED DRAWING: Figure 1 【課題】 帯電技術による捕集効率と加温若しくは保温機能との双方を発揮し、加工性にも優れたマスク用フィルタ基材を実現すること。【解決手段】この課題は、吸湿発熱性繊維からなる緻密な保温層と摩擦帯電繊維とが交絡一体化したフィルタ基材であって、上述した保温層の一方の表面側から他方の表面側に上述の摩擦帯電繊維が突出した貫通部を設け、かつ、この摩擦帯電繊維を双方の面側に配置構成した前述のフィルタ基材とする技術によって達成し得る。【選択図】 図１