Abstract: The present invention relates to a breathable film comprising at least one thermoplastic polymer and a surface-treated filler material product comprising a treatment layer comprising at least one mono-substituted succinic anhydride and/or at least one mono-substituted succinic acid and/or salty reaction product(s) thereof, a process for producing the same, and the use thereof. Furthermore, the present invention is directed to the use of a surface-treated filler material product comprising a treatment layer comprising at least one mono-substituted succinic anhydride and/or at least one mono-substituted succinic acid and/or salty reaction product(s) thereof in breathable films.

Abstract: An apparatus and a continuous process for manufacturing a ring-dyed polymeric filament. A filament, formed by melt extrusion is directly fed into a tank containing a dye solution for a predetermined period of time. The resulting ring-dyed filament includes an outer cross-sectional region colored with the dye and an inner cross-sectional region not colored with the dye. The outer cross-sectional region may be of uniform thickness over the length of the filament. A quenching step can be performed either before or during the ring-dyeing step.