The invention relates to a fibrous nonwoven, in particular for a filter medium, having a first layer, wherein at least one single-piece fiber strand of said first layer has a first fiber portion and a second fiber portion in the longitudinal direction, and wherein the fiber strand has a thickening substantially in said second fiber portion.

The invention is related to the nanofibrous wound dressing that has been developed to be used in the treatment of various types of skin wounds including chronic and acute wounds in the biomedical sector, wherein said wound dressing comprises a bioactive agent that promotes the process of wound healing.

The invention is related to the nanofibrous wound dressing that has been developed to be used in the treatment of various types of skin wounds including chronic and acute wounds in the biomedical sector, wherein said wound dressing comprises a bioactive agent that promotes the process of wound healing.

A process for the production of spunbonded nonwoven (1) and a device for this purpose are shown, wherein a spinning mass (2) is extruded through a plurality of nozzle holes of at least one spinneret (3) to form filaments (4) and the filaments (4) are charged with a drawing air stream to be drawn in an extrusion direction, wherein the filaments (4) are deposited on a perforated conveying device (9) to form a spunbonded nonwoven (1) and wherein the spunbonded nonwoven (1) is subsequently subjected to at least one washing (10) and one drying (12) by means of hot air (15), with, in each case, one exhaust air stream (18, 19) being discharged during the drawing and washing (10). So as to be able to reduce the energy consumption in the process during the drying of the spunbonded nonwoven without decreasing the product quality, it is suggested that the hot air (15) for drying (12) is generated at least partially by preheating an air stream (16) by means of one of the exhaust air streams (18, 19) from the drawing and washing (10).

A process for the production of spunbonded nonwoven (1) is shown, wherein a spinning mass (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) to form filaments (5) and the filaments (5) are drawn, in each case, in the extrusion direction, wherein the filaments (5) are deposited on a perforated conveying device (10) to form a spunbonded nonwoven (1) and wherein the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) oriented in a transverse direction (12) to the conveying direction (11) of the conveying device (10) so that the spunbonded nonwoven (1) formed on the conveying device (10) extends in this transverse direction (12). So as to enable the spinning width and the basis weight distribution of the spunbonded nonwoven to be adjusted reliably and, respectively, to allow the basis weight distribution to be kept constant during operation by means of the process, it is suggested that the spinning mass throughput (31) of the nozzle holes (4) is adjusted variably along the transverse direction (12).

A process for the production of spunbonded nonwoven (1) is shown, wherein a spinning mass (2) is extruded through a plurality of nozzle holes (4) of at least one spinneret (3, 40, 50) to form filaments (5) and the filaments (5) are drawn, in each case, in the extrusion direction, wherein the filaments (5) are deposited on a perforated conveying device (10) to form a spunbonded nonwoven (1) and wherein the nozzle holes (4) of the spinneret (3, 40, 50) are arranged along a main axis (6) oriented in a transverse direction (12) to the conveying direction (11) of the conveying device (10) so that the spunbonded nonwoven (1) formed on the conveying device (10) extends in this transverse direction (12). So as to enable the spinning width and the basis weight distribution of the spunbonded nonwoven to be adjusted reliably and, respectively, to allow the basis weight distribution to be kept constant during operation by means of the process, it is suggested that the spinning mass throughput (31) of the nozzle holes (4) is adjusted variably along the transverse direction (12).

A spun-blown non-woven web is disclosed which is formed from a plurality of fibers formed from a single polymer having an average fiber diameter ranging from between about 0.5 microns to about 50 microns; a basis weight of at least about 0.5 gsm; a tensile strength, measured in a machine direction, ranging from between about 20 g to about 4,200 g; a ratio of tensile strength, measured in the machine direction, to basis weight of at least about 20:1; and a ratio of percent elongation, measured in the machine direction, to fiber diameter of at least about 15.

A spun-blown non-woven web is disclosed which is formed from a plurality of fibers formed from a single polymer having an average fiber diameter ranging from between about 0.5 microns to about 50 microns; a basis weight of at least about 0.5 gsm; a tensile strength, measured in a machine direction, ranging from between about 20 g to about 4,200 g; a ratio of tensile strength, measured in the machine direction, to basis weight of at least about 20:1; and a ratio of percent elongation, measured in the machine direction, to fiber diameter of at least about 15.

A nonwoven fabric. The nonwoven fabric can include a first surface and a second surface and a visually discernible pattern of three-dimensional features on one of the first or second surface. Each of the three-dimensional features can define a microzone comprising a first region and a second region. The first and second regions can have a difference in values for an intensive property, and wherein in at least one of the microzones, the first region is hydrophobic and the second region is hydrophilic.

A nonwoven fabric. The nonwoven fabric can include a first surface and a second surface and a visually discernible pattern of three-dimensional features on one of the first or second surface. Each of the three-dimensional features can define a microzone comprising a first region and a second region. The first and second regions can have a difference in values for an intensive property, and wherein in at least one of the microzones, the first region is hydrophobic and the second region is hydrophilic.