The invention relates to an installation and a method for selectively producing a single- or multi-ply nonwoven includes an inclined wire former configured to deposit a sheet of wet-laid fibre material on a first circulating belt, a further belt configured to receive the sheet of wet-laid fibre material from the first circulating belt, a roller card arranged downstream in the material transport direction and configured to introduce a roller card web into the installation, a hydroentanglement arranged downstream in the material transport direction and including at least one water beam configured to entangle, bond and/or structure a single sheet of fibres or a plurality of sheets of fibres, and a dryer arranged downstream in the material transport direction.

Nonwoven materials having at least one layer comprising high core bicomponent fibers are provided. The nonwoven materials can have multiple layers and are suitable for use in a variety of applications, including in absorbent products. Such nonwoven materials can be patterned to create a three-dimensional topography including indentations formed of valleys and ridges. The nonwoven materials can have improved resiliency and strength and can retain their structure under wetted conditions and after tension and compression. The nonwoven materials can further facilitate the transfer of the liquid through the nonwoven material for improved liquid distribution and can also have improved liquid retention properties.

A roofing underlayment includes a hydrophobic nonwoven core layer that provides enhanced resistance to water infiltration. In addition to the hydrophobic nonwoven core layer, the roofing underlayment includes a coating layer adhered to a surface of the hydrophobic nonwoven core layer, and an exterior surface layer adhered to the coating layer. A roofing system that includes the roofing underlayment is also provided.

An installation and a method for selectively producing a single-ply or alternatively a multi-ply nonwoven includes an inclined wire former configured to deposit a sheet of wet-laid fibre material on a first circulating belt, a further belt configured to receive the sheet of wet-laid fibre material from the first circulating belt, a roller card arranged downstream in the material transport direction and configured to introduce a roller card web into the installation, a hydroentanglement arranged downstream in the material transport direction and including at least one water beam configured to entangle, bond and/or structure a single sheet of fibres or a plurality of sheets of fibres, and a dryer arranged downstream in the material transport direction

A composite material having a molten polymer barrier effect with flame-retardant properties includes a first layer of non-woven fabric having 40% or more by weight of oxidized polyacrylonitrile fibers to confer flame-retardant properties. The first layer has a basis weight of 200-600 g/m2 and a thickness of 1.6-5 mm. A barrier layer overlaps the first layer and counteracts passage of molten polymer. The first layers oxidized polyacrylonitrile fibers have a count of 1.5-5 dtex and the other first layer synthetic fibers have a count of 0.8-5 dtex. The barrier layer includes a second layer of non-woven fabric of hydro-entangled synthetic and/or artificial fibers. The barrier layer has a basis weight of 70-150 g/m2; a thickness of 0.4-1.5 mm; and a permeability of 200 L/m2s-2000 L/m2s under a pressure drop of 2 mbar. The composite material has a thickness of 2-6.5 mm, and a basis weight of 270-750 g/m2.

Disclosed is a production method of filtration layers that can be used in many fields, especially surgical masks. The aforementioned filtration layers are thermobond non-woven layers and layers formed by supporting it with an electrospinning method. Thermobond non-woven layer is obtained as a result of a process that includes fiber opening, fiber feeding, carding and bonding.

A method of manufacturing a hydrocarbon absorbent structure comprises providing a lower sheet of material and dispensing a hydrocarbon absorbent polymer mixture thereon. The polymer mixture is then preheated so as to at least partially melt the polymer mixture. An upper sheet of material is then provided onto the at least partially melted polymer mixture on the lower sheet of material. The lower sheet of material, polymer mixture and upper sheet of material are then laminated together to form a hydrocarbon absorbent laminate structure.

Layered nonwoven textile containing a first layer (T) of filaments, which contains endless filaments containing a first carrier polymer (A1) and a first binding polymer (B1), which forms at least a part of surface of said endless filaments and which has a melting temperature at least 5° C. lower than the first carrier polymer (A1), wherein the first layer (T) of filaments contains bonding points in a spaced arrangement, wherein the bonding points interconnect the filaments and are formed by the first binding polymer (B1), a second layer (M) of filaments, which contains filaments containing a carrier material, the stiffness of which is lower than the stiffness of the first carrier polymer (A1), and a second binding polymer (B2), which has a melting temperature at least 5° C., preferably at least 10° C., lower than the carrier material and the first carrier polymer (A1), wherein the second layer (M) of filaments contains bonding points in a spaced arrangement, wherein the bonding points interconnect the filaments of the second layer (M) and are formed by the second binding polymer (B1).

The invention relates to elastically stretchable nonwoven sheets comprising an elastically stretchable nonwoven layer and a stretchable facing layer, and an in-line method for making such sheets.

A high-adsorption-performance nanofiber filter medium includes a support material and a composite nanofiber filtration layer that includes multiple nanometer composite nanofiber layers deposited and stacked on the support material. The nanometer composite nanofiber layer includes first, second, and third nano-powder composite nanofibers, which are uniformly mixed by means of an airflow or are sequentially laminated to form the nanometer composite nanofiber layer. The nanometer composite nanofiber layer formed through sequential lamination includes first, second, and third nanofiber layers. The first nanofiber layer includes multiple first nano-powder composite nanofibers. The second nanofiber layer is stacked on the first nanofiber layer and includes multiple second nano-powder composite nanofibers. The third nanofiber layer is stacked on the second nanofiber layer and includes multiple third nano-powder composite nanofibers. The composite nanofiber filtration layer is formed of multiple nanometer composite nanofiber layers, so that the high-adsorption-performance nanofiber air filter medium shows improved performance.