Patent ID: 9662601
Date: 2017-05-30
CPC Classifications: B01D,B03C,D04H,Y10T

Claim:
1. A blended filament nonwoven fabric, comprising a blend of two types of filaments, wherein the two types of filaments are constituted of thermoplastic resins different from each other, wherein the thermoplastic resins have different shear viscosities, and a difference in the shear viscosities, which is obtained by dividing a higher shear viscosity value by a lower shear viscosity value, is 1.5 times or more, an average fiber diameter obtained by dividing the total value of fiber diameters of the filaments present in the nonwoven fabric by the number of the constituent filaments is 0.1 to 10 μm, the ratio of the number of constituent filaments having fiber diameters of 0.1 to 1.5 μm exceed 30%, and that the ratio of the number of constituent filaments having fiber diameters of 3 to 10 μm be less than 30%, and the nonwoven fabric has a specific volume of 20 cm