Nonwoven material comprising crimped multicomponent fibers

A nonwoven fabric sheet comprising crimped multicomponent fibers, wherein the fibers comprise two different polymer components (A) and (B) distributed over the cross section of the fiber in a side by side arrangement, wherein the interface line, contained in the radial plane of the fibers, between the two polymer components (A) and (B) is curved and its curvature (c) is

• c
• =
• h
• b
• =
• 0.05
• to
• 0.25
• wherein the baseline length (b) is the length of the imaginary straight baseline connecting the two endpoints of the curved interface line, and the bow height (h) is the distance of the crest of the curved interface line from the baseline, wherein the interface line has the shape of a single arc devoid of an inflection point at which the curvature changes sign.