COMPOSITE STRUCTURE OF WAVE-LIKE NON-WOVEN FABRIC WEB OF POLYMERIZED MICROFIBER, FIBER FILTER FACE MASK, FILTER, HEATINSULATION MATERIAL, AND PERPARATION OF WAVE-LIKE NON-WOVEN FABRIC WEB OF POLYMERIZED MICRO FIBER

摘要

PURPOSE: To provide a corrugated nonwoven filter having excellent filtration characteristics. CONSTITUTION: The composite structure 10 has the corrugated nonwoven web of polymeric microfiber(NWPM) 12 and a means 16 for holding the corrugated shape of this NWPM. The corrugated NWPM has an average size of holes of <150 μm and a volume rate of 0.1 or less and has approximately parallel plural corrugations. A shape holding means extends across the approximately parallel corrugations. The shape holding means is fixed to the corrugated NWPM in portions 20 of the valley parts of the approximately parallel corrugations. The shape holding means does not have the same spread as the spread of the corrugated NWPM between the adjacent two valley parts.