| 摘要 |
<p>To provide a filtering medium which is not be elongated by air pressure even though it is thin and to provide a filter unit being able to treat high volume of air, a filtering medium is comprised of a non-woven fabric containing mainly an organic fiber, in which single fibers are fixed, wherein the non-woven fabric is constructed of a plurality of single fibers having different Young's moduli and finenesses, a non-crimped single fiber having a Young's modulus of 150 cN/dtex or more, and a fineness of 7 dtex or more is contained at a ratio of 20% or more of a total fiber mass, and single fibers are fixed with a resin having a glass transition temperature of 30°C or more.</p> |
