| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonwoven fabric mat for filters and having high strength, excellent ventilation property, and high pollutant-collecting efficiency. SOLUTION: This nonwoven fabric is produced by mixing 20-90 wt. % of bulky cellulose type fiber which has the density of 0.2 g/cm<3> or lower in the case of being solely formed into a nonwoven fabric and 10-80 wt.% of cellulose fine fiber with fiber diameter of 0.1-3 μm and freeness of 400 ml or lower. The nonwoven fabric has the ventilation capacity of 20-100 l/cm<2> /min and DOP collecting efficiency of 30-80%. |
