Patent ID: 7914719

Claim:
A process for the manufacture of a spun fleece made of bi-component or multi-component filaments of polyolefin having a core-sheath structure, wherein a hydrophilic additive is present exclusively in the sheath component, comprising the steps of sequentially; (a) spinning the bi-component or multi-component filaments of polyolefin having a core-sheath structure out of a mixture of at least one polyolefin and at least one hydrophilic additive, to obtain the filaments containing as the core component the at least one polyolefin, and as the sheath component the at least one polyolefin, and also containing the hydrophilic additive; (b) forming the spun filaments into a fleece web; (c) thereafter in a separate step precompacting the fleece web; (d) thereafter in a separate step heating the precompacted fleece web to a temperature of 40 to 100° C. to obtain the spun fleece made of the filaments of polyolefin containing as the core component the at least one polyolefin, and as the sheath component the polyolefin, wherein the sheath component exclusively contains the hydrophilic additive; and (e) thereafter in a separate step hydrodynamically compacting the heated and precompacted fleece web through impulse transfer of the water to the filaments.