Elastic nonwoven sheet

An elastically stretchable nonwoven sheet comprising at least three adjacent layers of nonwoven materials,

• wherein one of the three layers is an elastically stretchable nonwoven layer consisting of spunbonded elastic fibers formed from a thermoplastic elastomer polymer material,
• wherein another two of the three layers are stretchable facing layers comprising spunbonded crimped multicomponent fibers,
• wherein the sheet comprises a sandwich structure of the elastically stretchable nonwoven layer between one of the facing layers on either side thereof, and wherein the three adjacent layers are bonded together by areal bonding points that are embossed into the sheet by embossing projections that are arranged on a surface of at least one calender roll and which are heated or into which ultrasonic vibrations are introduced, wherein the number of bonding points per cm2 of the sheet surface is between 20 and 100 and the total area of the sheet surface taken up by the areal bonding points is less than 18%,
• wherein at least one of the components of the crimped multicomponent fibers is a propylene-α-olefin copolymer material and a further component of the crimped multicomponent fibers is a polypropylene homopolymer material, and an elongation at break of the sheet in machine direction is greater than 150% when measured according to WSP 100.4.