| 摘要 |
PURPOSE:To obtain a new ultrafine fiber combined filament nonwoven fabric having moisture absorptivity, hydrophilicity, lipophilicity and elasticity by combining saponified ethylene-vinyl acetate copolymer-based ultrafine fiber streams with polyurethane-based ultrafine fiber streams at a specific ratio and collecting the combined streams in the form of a sheet. CONSTITUTION:A polymer consisting essentially of saponified ethylene-vinyl acetate copolymer with 40-60mol% ethylene content and 0.055-0.085l/g intrinsic viscosity [eta] is melted and spun by a melt blowing spinning method to form ultrafine fiber streams (A) having $8mu average fiber diameter. On the other band, a polymer consisting essentially of a polyurethane with 45-75wt.% soft segment content, prepared by using a chain extender consisting essentially of a diol and having 0. 05-0.10l/g intrinsic viscosity [eta] is melted and spun by a melt blowing spinning method to form ultrafine fiber streams (B) having <=8mu average fiber diameter. The above-mentioned fiber streams (A) and (B) are combined so as to provide 95-30wt.% fiber streams (A) and 5-70wt.% fiber streams (B) and the combined streams are collected into the form of a sheet to afford the objective nonwoven fabric. |
