The invention relates to a filter material for a smoking product, comprising a nonwoven material, wherein the nonwoven material is hydro-entangled, the hydro-entangled nonwoven material contains min. 50% and max. 90% wood cellulose fibres, min. 10% and max. 50% fibres from regenerated cellulose and less than 30% non-natural polymers, in relation to the mass of the hydro-entangled nonwoven material, and together the amount of wood cellulose fibres and fibres from regenerated cellulose make up at least 70% of the mass of the hydro-entangled nonwoven material, and the hydro-entangled nonwoven material has a density of min 100 kg/m.sup.3 and max. 300 kg/m.sup.3 and a thickness of min. 100 m and max. 1000 m. The invention also relates to a segment with the filter material, a smoking product and a production method.

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.

A fluid management layer that includes a nonwoven having a basis weight of from about 40 gsm to about 75 gsm, from about 15 to about 35 weight percent of cellulosic fibers, from about 65 to about 85 weight percent of bonding fibers, wherein the fluid management layer has a caliper factor of from about 0.26 to about 0.35, and wherein the cellulosic fibers and the bonding fibers have a decitex below about 2. The fluid management layer can be included in a disposable absorbent article.

A fluid management layer that includes a nonwoven having a basis weight of from about 40 gsm to about 75 gsm, from about 15 to about 35 weight percent of cellulosic fibers, from about 65 to about 85 weight percent of bonding fibers, wherein the fluid management layer has a caliper factor of from about 0.26 to about 0.35, and wherein the cellulosic fibers and the bonding fibers have a decitex below about 2. The fluid management layer can be included in a disposable absorbent article.

The invention relates to a method for the production of lyocell staple fibers, comprising the steps in the following order: a) extruding filaments from a solution of cellulose in an organic solvent; b) precipitating the cellulose for the formation of continuous cellulose filaments; c) washing the cellulose filaments; d) contacting the cellulose filaments with a crosslinking agent; e) reacting the cellulose filaments with the crosslinking agent in a reaction chamber; f) washing the treated cellulose filaments; g) cutting the washed cellulose filaments into staple fibers; h) forming a nonwoven fleece from the staple fibers and pressing the nonwoven fleece; and i) finishing the nonwoven fleece and pressing the nonwoven fleece.

The invention relates to a method for the production of lyocell staple fibers, comprising the steps in the following order: a) extruding filaments from a solution of cellulose in an organic solvent; b) precipitating the cellulose for the formation of continuous cellulose filaments; c) washing the cellulose filaments; d) contacting the cellulose filaments with a crosslinking agent; e) reacting the cellulose filaments with the crosslinking agent in a reaction chamber; f) washing the treated cellulose filaments; g) cutting the washed cellulose filaments into staple fibers; h) forming a nonwoven fleece from the staple fibers and pressing the nonwoven fleece; and i) finishing the nonwoven fleece and pressing the nonwoven fleece.

A method for producing a wet-laid non-woven fabric web includes: providing a first suspension with natural pulp fibers in a first tank, providing a second suspension with regenerated cellulose fibers in a second tank, combining the first suspension and the second suspension to create a mixture, feeding the mixture to a headbox and dewatering the mixture in the forming section of a machine for producing the wet-laid non-woven fabric web. The second suspension with the regenerated cellulose fibers is conveyed by a volumetric pump, in particular by an eccentric screw pump, from the second tank into the volume flow of the first suspension. Wherein over the entire conveying path between the second tank and the headbox, the second suspension is not conducted through any mixing chest having a stirrer. Furthermore, a corresponding system for carrying out the method is taught.

A method for producing a wet-laid non-woven fabric web includes: providing a first suspension with natural pulp fibers in a first tank, providing a second suspension with regenerated cellulose fibers in a second tank, combining the first suspension and the second suspension to create a mixture, feeding the mixture to a headbox and dewatering the mixture in the forming section of a machine for producing the wet-laid non-woven fabric web. The second suspension with the regenerated cellulose fibers is conveyed by a volumetric pump, in particular by an eccentric screw pump, from the second tank into the volume flow of the first suspension. Wherein over the entire conveying path between the second tank and the headbox, the second suspension is not conducted through any mixing chest having a stirrer. Furthermore, a corresponding system for carrying out the method is taught.

A separator for an electrochemical element is shown, in which at least 50% of the mass of the separator is formed by fibrillated regenerated cellulose fibers, wherein, including the fibrillated regenerated cellulose fibers, at least 70% and at most 100% of the mass of the separator is formed by cellulose fibers, and wherein the separator is calendered, and wherein under tensile load in the machine direction in accordance with ISO 1924-2:2008, the separator reaches its 0.1% yield point at an elongation of no less than 0.5% and no more than 2.0%. A method of manufacturing such a separator is also disclosed.

A separator for an electrochemical element is shown, in which at least 50% of the mass of the separator is formed by fibrillated regenerated cellulose fibers, wherein, including the fibrillated regenerated cellulose fibers, at least 70% and at most 100% of the mass of the separator is formed by cellulose fibers, and wherein the separator is calendered, and wherein under tensile load in the machine direction in accordance with ISO 1924-2:2008, the separator reaches its 0.1% yield point at an elongation of no less than 0.5% and no more than 2.0%. A method of manufacturing such a separator is also disclosed.