Disclosed is a treatment agent for flame-resistant fiber nonwoven fabric production or for carbon fiber nonwoven fabric production. The treatment agent contains a polyether compound in which ethylene oxide and propylene oxide are added to an alcohol. Also disclosed is a flame-resistant fiber nonwoven fabric or carbon fiber nonwoven fabric that includes the treatment agent adhered thereto.

Disclosed is a treatment agent for flame-resistant fiber nonwoven fabric production or for carbon fiber nonwoven fabric production. The treatment agent contains a polyether compound in which ethylene oxide and propylene oxide are added to an alcohol. Also disclosed is a flame-resistant fiber nonwoven fabric or carbon fiber nonwoven fabric that includes the treatment agent adhered thereto.

A process (100, 101) for the production of spunbonded nonwoven (1) and a device (200, 201) are shown, comprising an embossing pattern (10), wherein a spinning mass (2) is extruded through a plurality of nozzle holes of at least one spinneret (3, 30) to form filaments (4, 40) and the filaments (4, 40) are drawn by a drawing air stream (5, 50), in each case, in the extrusion direction, with the filaments (4, 40) being deposited on a perforated tray (7) of a conveying device (8) to form a spunbonded nonwoven (1). So as to allow an efficient, technically simple and inexpensive introduction of the embossing pattern into the spunbonded nonwoven, it is suggested that the perforated tray (7) has an embossing structure (9) with an embossing pattern (10), the filaments (4, 40) are pressed into the embossing structure (9) by the drawing air stream (5, 50) and the spunbonded nonwoven (1) thus formed is provided with the embossing pattern (10).

A raw water channel spacer capable of suppressing formation of a concentration polarization layer in a region in the vicinity of a separation membrane in a raw water channel, and a spiral wound membrane element including the same are provided. A raw water channel spacer is formed by superposing a first yarn row and a second yarn row, and includes alternately a first mesh structure having a configuration in which first rectangular meshes formed of the yarn rows are continuous in an extending direction of the second yarn row, and a second mesh structure having a configuration in which meshes are continuous in the extending direction of the second yarn row such that an interval in the second yarn row is smaller than an interval of the second yarn row forming the first mesh structure.

A raw water channel spacer capable of suppressing formation of a concentration polarization layer in a region in the vicinity of a separation membrane in a raw water channel, and a spiral wound membrane element including the same are provided. A raw water channel spacer is formed by superposing a first yarn row and a second yarn row, and includes alternately a first mesh structure having a configuration in which first rectangular meshes formed of the yarn rows are continuous in an extending direction of the second yarn row, and a second mesh structure having a configuration in which meshes are continuous in the extending direction of the second yarn row such that an interval in the second yarn row is smaller than an interval of the second yarn row forming the first mesh structure.

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) and a device for this purpose are shown, wherein a spinning mass (2) containing solvent is extruded through a plurality of nozzle holes of at least one spinneret (3) to form filaments (4) and the filaments (4) are drawn, in each case, in the extrusion direction, wherein the filaments (4) are deposited on a perforated conveying device (9) to form a spunbonded nonwoven (1) and, subsequently, are subjected to washing (10) for washing out the solvent from the filaments (4) and to hydroentanglement (11). So as to allow an inexpensive and efficient production of hydroentangled spunbonded nonwoven by means of the process, it is suggested that fresh water (12) is supplied to the hydroentanglement (11) and the waste water (13) from the hydroentanglement (11) is supplied to the washing (10) as wash water (14).

A process for the production of spunbonded nonwoven (1) and a device for this purpose are shown, wherein a spinning mass (2) containing solvent is extruded through a plurality of nozzle holes of at least one spinneret (3) to form filaments (4) and the filaments (4) are drawn, in each case, in the extrusion direction, wherein the filaments (4) are deposited on a perforated conveying device (9) to form a spunbonded nonwoven (1) and, subsequently, are subjected to washing (10) for washing out the solvent from the filaments (4) and to hydroentanglement (11). So as to allow an inexpensive and efficient production of hydroentangled spunbonded nonwoven by means of the process, it is suggested that fresh water (12) is supplied to the hydroentanglement (11) and the waste water (13) from the hydroentanglement (11) is supplied to the washing (10) as wash water (14).

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.