The invention relates to nonwoven fabric sheets containing crimped multicomponent fibers.

The invention relates to a multilayer sound absorber comprising a flow-resistant nonwoven with at least two individual flow-resistant layers, wherein the individual flow-resistant layers are arranged one above the other in a direction of penetration of the sound waves to be absorbed and each has a flow resistance between 300 Pa s/m and 1800 Pa s/m, preferably between 400 Pa s/m and 1500 Pa s/m, wherein the flow resistance of the respective individual flow-resistant layer increases from individual flow-resistant layer to individual flow-resistant layer in the direction of penetration. The invention also relates to a method for manufacturing the multilayer sound absorber according to the invention and to a use of the multilayer sound absorber according to the invention for sound absorption in the automotive sector, as well as in the field of building and room acoustics.

A nonwoven fabric (NF) comprising a multilayer structure that comprises: i) at least one meltblown layer (M) comprising melt blown fibers (MBF) comprising a first propylene polymer (PP1) having: a) an amount of 2,1-regiodefects in the range from 0.0 to 0.1 mol-%; and b) a melting temperature Tm in the range from 155 to 170 C., ii) at least one spunbonded layer (S) comprising spunbonded fibers (SBF) comprising a second propylene polymer (PP2) having: a) an amount of 2,1-regiodefects in the range from 0.4 to 1.5 mol-%; and b) a melting temperature Tm in the range from 145 to 160 C. wherein the melting temperature of the first polypropylene polymer Tm (PP1) is at least 5.0 C. higher than that of the second first polypropylene polymer Tm (PP2).

Backsheets having a combination of desirable liquid barrier properties and air permeability are provided. The backsheets include outermost spunbond layers and two or more fine-fiber containing nonwoven layers.

Provided is an extraction bag in which an accessory member can be appropriately joined to a sheet constituting the extraction bag, even in a case where biodegradable polylactic acid resins are adopted as a resin for a nonwoven fabric for use in the sheet and as a resin for a laminate for use in the accessory member of the extraction bag, without damaging the nonwoven fabric side. An extraction bag 100 including a spunbond nonwoven fabric layer 10 containing a polylactic acid resin and an accessory member 20 which are joined, wherein a laminate layer 21 containing a polylactic acid resin is provided on at least a surface of the accessory member 20 in contact with the spunbond nonwoven fabric layer 10, and wherein a degree of crystallinity of the polylactic acid resin contained in the laminate layer 21 is set to be smaller than a degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10.

A building composite panel including a core of a continuous phase comprising hydraulic binder. The core has first and second opposed longitudinal edge faces, and opposed first and second major faces, each major face adjoining the first and second opposed longitudinal edge faces. A slurry-permeable reinforcing material is attached to the first major face. A non-woven polymer fabric laminate facing material, that is different from the reinforcing material, covering and attached to and traversing the first major face and covering and attached to the opposed longitudinal edges of the core. The facing material includes a plurality of bonded laminas, wherein the plurality includes a first and second water-permeable laminas on opposed outer sides of the facing material, and a water-impermeable lamina between the first and second water-permeable laminas. The first water-permeable lamina attached to the core. A method for making the panel is also provided.

Provided is cloth that is excellent in dust protection and liquid protection with a first outermost layer of a layered nonwoven fabric containing a predetermined amount of an antistatic agent relative to the entire layer, a second outermost layer of the layered nonwoven fabric containing a predetermined amount or less of an antistatic agent relative to the entire layer, where a joint region includes a seam allowance located on the inner side of the cloth and a tape member, and the seam allowance is covered with the tape member, where at least both end portions of the tape member in a short-side direction are fixed to the second outermost layer, and water pressure resistance (A) of the layered nonwoven fabric is in a predetermined range, and a ratio of water pressure resistance (B) of the joint region to the water pressure resistance (A) is in a predetermined range.

The present invention provides a nonwoven fabric that is biodegradable and has a good pleat retaining property, and an application thereof. The present invention relates to a nonwoven fabric comprising at least one fiber layer (I) which contains a polylactic acid polymer and which has an average fiber diameter of 10-30 m, wherein in polarized Raman spectroscopy of the fiber layer (I), the value I///I, which is the ratio of the peak intensity I// at 872 cm.sup.1 of a Raman spectrum measured with polarized light parallel to a fiber axis, to the peak intensity I at 872 cm.sup.1 of a Raman spectrum measured with polarized light perpendicular to the fiber axis, is not more than 1.80. The present invention also relates to a filter material comprising the nonwoven fabric, and a filter for foods, an air filter, and a mask which each comprise the filter material.

A filter or mask structure, comprising a first face layer comprising a polymer and having a face basis weight, a second outer layer comprising a polymer and having an outer basis weight less than 34 gsm, and a third outer layer comprising a polymer and having a third basis weight and disposed between the first face layer and the second outer layer. At least one of the layers further comprises an AM/AV compound. The mask structure demonstrates an Escherichia coli efficacy log reduction greater than 4.0, as measured in accordance with ASTM E3160 (2018) and a particulate filtration efficiency greater than 90%, as measured in accordance with ASTM F2299-03R17.

A barrier fabric suitable as a backsheet for an underpad configured for a low air loss bed, in which the barrier fabric comprises a first nonwoven fabric including outermost spunbond layers and two or more fine-fiber containing nonwoven layers. Each of the nonwoven layers being treated with a non-fluorinated barrier coating (NFBC).