The invention relates to a process (100, 101) for the production of spunbonded nonwovens (1.1, 1.2, 1.3) and a device (200, 201) for the production of spunbonded nonwovens (1.1, 1.2, 1.3), wherein, in the process (100, 101), a spinning mass (2) is extruded through a plurality of nozzle holes (4.1, 4.2, 4.3) of at least a first spinneret (3.1) and a second spinneret (3.2) to form filaments (5.1, 5.2, 5.3) and the filaments (5.1, 5.2, 5.3) are drawn, in each case, in the extrusion direction, with the filaments (5.1) of the first spinneret (3.1) being deposited on the conveyor belt (9) to form a first spunbonded nonwoven (1.1) and the filaments (5.2) of the second spinneret (3.2) being deposited on the conveyor belt (9) to form a second spunbonded nonwoven (1.2) over the first spunbonded nonwoven (1.1) in order to obtain a multi-layered spunbonded nonwoven (10). For increasing the throughput of the process, it is suggested that the multi-layered spunbonded nonwoven (10) is separated into at least the first spunbonded nonwoven (1.1) and the second spunbonded nonwoven (1.2) in a subsequent step and the first and second spunbonded nonwovens (1.1, 1.2) after separation each undergo a hydroentanglement (15.1, 15.2) and optionally a drying (12) individually and/or are each wound up individually.

The invention relates to a process (100, 101) for the production of spunbonded nonwovens (1.1, 1.2, 1.3) and a device (200, 201) for the production of spunbonded nonwovens (1.1, 1.2, 1.3), wherein, in the process (100, 101), a spinning mass (2) is extruded through a plurality of nozzle holes (4.1, 4.2, 4.3) of at least a first spinneret (3.1) and a second spinneret (3.2) to form filaments (5.1, 5.2, 5.3) and the filaments (5.1, 5.2, 5.3) are drawn, in each case, in the extrusion direction, with the filaments (5.1) of the first spinneret (3.1) being deposited on the conveyor belt (9) to form a first spunbonded nonwoven (1.1) and the filaments (5.2) of the second spinneret (3.2) being deposited on the conveyor belt (9) to form a second spunbonded nonwoven (1.2) over the first spunbonded nonwoven (1.1) in order to obtain a multi-layered spunbonded nonwoven (10). For increasing the throughput of the process, it is suggested that the multi-layered spunbonded nonwoven (10) is separated into at least the first spunbonded nonwoven (1.1) and the second spunbonded nonwoven (1.2) in a subsequent step and the first and second spunbonded nonwovens (1.1, 1.2) after separation each undergo a hydroentanglement (15.1, 15.2) and optionally a drying (12) individually and/or are each wound up individually.

Non woven fabrics including at least one nonwoven layer comprising a plurality of fibers comprising a polymeric material having a melt flow rate (MFR) of less than about 40 g/10 min according to ASTM D1238 (2.16 kg at 230° C.) are provided. The plurality of fibers includes (i) one or more ultraviolet radiation protective agents (UVPA), and (ii) one or more inorganic pigments comprising an inert coating thereon.

The disclosure relates to a pleatable nonwoven fabric including greater than 50% by weight of a majority polymer component, based on total weight of the fabric, and a minority polymer component, wherein there is a difference of at least 10° C. in melting point between the majority polymer component and the minority polymer component, and wherein the fabric is arranged in layers with a first layer, a second layer, and a mid-layer positioned between the first layer and the second layer, and wherein the top layer and the bottom layer comprise a plurality of bicomponent fibers comprising both the majority polymer component and the minority polymer component; and wherein the mid-layer comprises monocomponent fibers constructed from either the majority polymer component or the minority polymer component. A method of making the pleatable nonwoven fabric is also provided.

The disclosure relates to a pleatable nonwoven fabric including greater than 50% by weight of a majority polymer component, based on total weight of the fabric, and a minority polymer component, wherein there is a difference of at least 10° C. in melting point between the majority polymer component and the minority polymer component, and wherein the fabric is arranged in layers with a first layer, a second layer, and a mid-layer positioned between the first layer and the second layer, and wherein the top layer and the bottom layer comprise a plurality of bicomponent fibers comprising both the majority polymer component and the minority polymer component; and wherein the mid-layer comprises monocomponent fibers constructed from either the majority polymer component or the minority polymer component. A method of making the pleatable nonwoven fabric is also provided.

Melt-blown fiber comprising two polypropylenes which differ in their molecular weight.

Melt-blown fiber comprising two polypropylenes which differ in their molecular weight.

A cusp die for producing melt-blown non-woven fabric is provided, defining a sagittal plane, a main extension direction on the sagittal plane, a first flank and a second flank mutually bounded by the sagittal plane and including an ejection portion extending along the main extension direction and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion, a plurality of holes arranged in the ejection portion, placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes are arranged along at least one first row and a second row that are distinct and arranged respectively at the first flank and the second flank.

A cusp die for producing melt-blown non-woven fabric is provided, defining a sagittal plane, a main extension direction on the sagittal plane, a first flank and a second flank mutually bounded by the sagittal plane and including an ejection portion extending along the main extension direction and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion, a plurality of holes arranged in the ejection portion, placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes are arranged along at least one first row and a second row that are distinct and arranged respectively at the first flank and the second flank.

A nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.