Self-crimped multi-component fibers (SMF) are provided that include (i) a first component comprising a first polymeric material, in which the first polymeric material comprises a first melt flow rate (MFR) that is less than 50 g/10 min; and (ii) a second component comprising a second polymeric material, in which the second component is different than the first component. The SMF includes one or more three-dimensional crimped portions. Also provided are nonwoven fabrics comprising a plurality of SMFs. Methods of manufacturing SMFs and nonwoven fabrics including SMFs are also provided.

Processes for making fibrous structures and more particularly processes for making fibrous structures comprising filaments are provided.

Processes for making fibrous structures and more particularly processes for making fibrous structures comprising filaments are provided.

The present invention relates to a melt-blown fiber web having improved elasticity and cohesion, and a manufacturing method therefor. The objective of the present invention is accomplished by a melt-blown fiber web comprising a thermoplastic resin which comprises 10 to 60 wt % of thermoplastic resin microfibers and 40 to 90 wt % of non-circular cross-sectional hollow conjugated staple fibers with respect to the total weight of the fiber web.

The present invention relates to a melt-blown fiber web having improved elasticity and cohesion, and a manufacturing method therefor. The objective of the present invention is accomplished by a melt-blown fiber web comprising a thermoplastic resin which comprises 10 to 60 wt % of thermoplastic resin microfibers and 40 to 90 wt % of non-circular cross-sectional hollow conjugated staple fibers with respect to the total weight of the fiber web.

The invention refers to a cover nonwoven for an interior lining for a vehicle, comprising a nonwoven fabric consisting of at least two nonwoven layers, a first nonwoven layer and a second nonwoven layer, wherein a first outer surface of the nonwoven fabric is formed by a surface of the first nonwoven layer and a second outer surface of the nonwoven fabric is formed by a surface of the second nonwoven layer, and wherein the first nonwoven layer and the second nonwoven layer are inseparably bonded on the entire surface.

According to the invention, the first nonwoven layer is formed of a rough polypropylene spunlaced nonwoven and the second nonwoven layer is formed of a dense polypropylene spun-bonded nonwoven, wherein the first outer surface of the nonwoven fabric is suitable for the application of a pressure-sensitive adhesive, and wherein the second outer surface of the nonwoven fabric has hydrophobic properties.

The invention refers to a cover nonwoven for an interior lining for a vehicle, comprising a nonwoven fabric consisting of at least two nonwoven layers, a first nonwoven layer and a second nonwoven layer, wherein a first outer surface of the nonwoven fabric is formed by a surface of the first nonwoven layer and a second outer surface of the nonwoven fabric is formed by a surface of the second nonwoven layer, and wherein the first nonwoven layer and the second nonwoven layer are inseparably bonded on the entire surface.

According to the invention, the first nonwoven layer is formed of a rough polypropylene spunlaced nonwoven and the second nonwoven layer is formed of a dense polypropylene spun-bonded nonwoven, wherein the first outer surface of the nonwoven fabric is suitable for the application of a pressure-sensitive adhesive, and wherein the second outer surface of the nonwoven fabric has hydrophobic properties.

A polypropylene composition is described having an MFI measured according to ISO 1133 for polypropylene of 1 to 3 g/10 min and a xylene soluble content in the range from 1 wt % to 4.5 wt % or 1.5 wt % to 4.5 wt %, which can be used to produce spun and drawn fibres having an average MFI measured according to ISO 1133 for polypropylene of 1 to 5 g/min, a xylene soluble content in the range from 1 wt % to 4.5 wt % or 1.5 wt % to 4.5 wt %, the spun and drawn fibres having an average elongation of at least 65% as measured by ISO 5079 with an adjusted testing speed of 80 mm/min, and/or an average tenacity/tensile strength of at least 56 c N/tex as measured by ISO 5079 with an adjusted testing speed of 80 mm/min.

A polypropylene composition is described having an MFI measured according to ISO 1133 for polypropylene of 1 to 3 g/10 min and a xylene soluble content in the range from 1 wt % to 4.5 wt % or 1.5 wt % to 4.5 wt %, which can be used to produce spun and drawn fibres having an average MFI measured according to ISO 1133 for polypropylene of 1 to 5 g/min, a xylene soluble content in the range from 1 wt % to 4.5 wt % or 1.5 wt % to 4.5 wt %, the spun and drawn fibres having an average elongation of at least 65% as measured by ISO 5079 with an adjusted testing speed of 80 mm/min, and/or an average tenacity/tensile strength of at least 56 c N/tex as measured by ISO 5079 with an adjusted testing speed of 80 mm/min.

The present invention provides an electret fiber sheet having superior recovery of airflow volume by heat treatment and having high air permeability. The electret fiber sheet of the present invention is a nonwoven fabric formed from long fibers that are formed from a thermoplastic resin and have an average single fiber diameter of 0.1 to 8.0 m, wherein a bulk density of the nonwoven fabric is 0.05 to 0.30 g/cm.sup.3 and the long fibers contain a crystal nucleating agent at 0.005 to 1.0% by mass.