A process for producing a nonwoven fabric, the process comprising the following steps: a) providing a surface-treated calcium carbonate-containing filler material, the surface-treated calcium carbonate-containing filler material comprising a calcium carbonate-containing filler material having prior to the surface treatment i) a weight median particle size ( d 50) value in the range from 0.1 μm to 7 μm, ii) a top cut ( d 98) value of 15 μm or less, iii) a specific surface area from 0.5 to 120 m 2 /g, as measured by the BET method, and iv) a residual total moisture content from 0.01 wt.-% to 1 wt.-%, based on the total dry weight of the at least one calcium carbonate-containing filler material, and a surface-treatment layer on at least a part of the surface of said calcium carbonate-containing filler material, wherein the surface-treatment layer is formed by contacting the calcium carbonate-containing filler material with a surface treatment agent in an amount from 0.1 to 3 wt.-%, based on the total dry weight of the calcium carbonate-containing filler material, and wherein the surface treatment agent comprises at least one carboxylic acid and/or a salt or anhydride thereof, b) providing a first polypropylene polymer being an isotactic polypropylene homopolymer having a melt flow rate MFR (230°C / 2.16 kg) in the range of 15 to 40 g/10 min, as measured according to EN ISO 1133:2011, c) providing a second polypropylene polymer being an isotactic polypropylene homopolymer having a melt flow rate MFR (230°C / 2.16 kg) in the range of 15 to 40 g/10 min, as measured according to EN ISO 1133:2011, d) forming a masterbatch by compounding the surface-treated calcium carbonate-containing filler material of step a) in an amount of 60 wt.-% to 75 wt.-%, based on the total weight of the masterbatch, with the first polypropylene polymer of step b), e) mixing the masterbatch of step d) with the second polypropylene polymer of step c) to obtain a mixture having a surface-treated calcium carbonate-containing filler material content in the range of 5 wt.-% to 15 wt.-%, based on the total weight of the mixture, f) forming the mixture of step e) into filament fibers having an average fiber diameter in the range from 11 to 30 μm, g) forming a fibrous web from the fibers of step f), and h) forming the non-woven fabric by hydroentanglement of the fibrous web of step g), wherein the water pressure during hydroentanglement step h) does not exceed 100 bar and wherein the final bonding step during hydroentanglement is carried out at a water pressure in the range of 80 to 100 bar. a) providing a surface-treated calcium carbonate-containing filler material, the surface-treated calcium carbonate-containing filler material comprising a calcium carbonate-containing filler material having prior to the surface treatment i) a weight median particle size ( d 50) value in the range from 0.1 μm to 7 μm, ii) a top cut ( d 98) value of 15 μm or less, iii) a specific surface area from 0.5 to 120 m 2 /g, as measured by the BET method, and iv) a residual total moisture content from 0.01 wt.-% to 1 wt.-%, based on the total dry weight of the at least one calcium carbonate-containing filler material, and a surface-treatment layer on at least a part of the surface of said calcium carbonate-containing filler material, wherein the surface-treatment layer is formed by contacting the calcium carbonate-containing filler material with a surface treatment agent in an amount from 0.1 to 3 wt.-%, based on the total dry weight of the calcium carbonate-containing filler material, and wherein the surface treatment agent comprises at least one carboxylic acid and/or a salt or anhydride thereof, i) a weight median particle size ( d 50) value in the range from 0.1 μm to 7 μm, ii) a top cut ( d 98) value of 15 μm or less, iii) a specific surface area from 0.5 to 120 m 2 /g, as measured by the BET method, and iv) a residual total moisture content from 0.01 wt.-% to 1 wt.-%, based on the total dry weight of the at least one calcium carbonate-containing filler material, b) providing a first polypropylene polymer being an isotactic polypropylene homopolymer having a melt flow rate MFR (230°C / 2.16 kg) in the range of 15 to 40 g/10 min, as measured according to EN ISO 1133:2011, c) providing a second polypropylene polymer being an isotactic polypropylene homopolymer having a melt flow rate MFR (230°C / 2.16 kg) in the range of 15 to 40 g/10 min, as measured according to EN ISO 1133:2011, d) forming a masterbatch by compounding the surface-treated calcium carbonate-containing filler material of step a) in an amount of 60 wt.-% to 75 wt.-%, based on the total weight of the masterbatch, with the first polypropylene polymer of step b), e) mixing the masterbatch of step d) with the second polypropylene polymer of step c) to obtain a mixture having a surface-treated calcium carbonate-containing filler material content in the range of 5 wt.-% to 15 wt.-%, based on the total weight of the mixture, f) forming the mixture of step e) into filament fibers having an average fiber diameter in the range from 11 to 30 μm, g) forming a fibrous web from the fibers of step f), and h) forming the non-woven fabric by hydroentanglement of the fibrous web of step g), wherein the water pressure during hydroentanglement step h) does not exceed 100 bar and wherein the final bonding step during hydroentanglement is carried out at a water pressure in the range of 80 to 100 bar.