Patent ID: 8557170

Claim:
A process for the manufacture of nonwoven surfaces by direct melt spinning of filaments of a composition based on thermoplastic polymers comprising the steps of: a) feeding the composition to a plurality of spinnerets each comprising several spinning orifices, b) feeding the filaments to a pneumatic attenuation device and a stage in which the filaments obtained are formed into a sheet, wherein the composition based on thermoplastic polymers comprises a polymeric matrix and/or a modifying polymeric additive comprising repeat units corresponding to the following general formulae: in which: R 1 , R 2 , R 3 and R 4 , which are identical or different, represent aliphatic, cycloaliphatic or aromatic hydrocarbon chains comprising from 2 to 18 carbon atoms, R 5 represents a polyether radical with a molecular weight of between 400 and 200 000, A and B represent the CO, NH or O groups; when A represents CO, B represents NH or O and vice versa, with the proviso that (a) when the additive is absent, the polymeric matrix comprises at least one of the repeat units I or II and at least one of the repeat units III or IV; (b) when the additive is present, the polymeric matrix comprises at least one of the repeat units I or II.