Patent ID: 7367093

Claim:
A method for producing an at least four-ply sandwich nonwoven material comprising continuous forming of a nonwoven material comprising first a base ply, then the at least two middle plies and finally a cover ply, then continuous bonding of the nonwoven material by hydrodynamic needling alone, followed by drying of the nonwoven material, the base ply and the cover ply being formed from nonwovens of staple fibers up to 100 mm long, which are produced by a carding method, or of spun-bond or melt-blown fibers and the at least two middle plies covered by the base ply and cover ply being produced from pulp fibers or pulp fibers blended with synthetic fibers or natural fibers, wherein one of the at least two middle plies is produced from fibers different than fibers from which another of the at least two middle plies is produced and has unlike liquid absorption capacities than those of the another of the at east two middle plies.