Abstract: A method for producing a nonwoven fabric made of crimped synthetic fibers, wherein the synthetic fibers are spun and are deposited on a conveyor as a nonwoven web. The deposited nonwoven web is pre-bonded by means of at least one first hot-air bonding device, wherein a main suction air is sucked from below through the conveyor in the area of fiber deposition. A first suction air is sucked from below through the conveyor in the region of the first hot-air bonding device. The air speed of the main suction air is greater than the air speed of the first suction air.

Abstract: A spunbond nonwoven laminate has a first spunbond nonwoven layer having crimped filaments formed by a first component on an outer surface of the filaments of the first layer consisting or substantially consisting of a polyolefin and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the first layer. A second outermost spunbond nonwoven layer on the first layer having filaments as a cover layer and formed by a first component on an outer surface of the filaments of the second layer consisting or substantially consisting of a polyolefin, and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the second layer.

Abstract: A method for producing an edge structure of a semiconductor component includes: providing a semiconductor body having at least two mutually spaced-apart main faces respectively having an edge, between which edges an edge face extends; and etching a predetermined edge contour by purposely applying a chemical etchant onto the edge face by an etchant jet with simultaneous rotation of the semiconductor body about a rotation axis. The etchant jet is guided with a predetermined jet cross section, while being directed tangentially with respect to the edge face, such that the etchant jet impinges on the edge face only with a part of the jet cross section. A corresponding device for producing an edge structure of a semiconductor component is also described.

Abstract: The invention relates to a nonwoven unit comprising at least one nonwoven layer having at least one first layer and at least one second layer. The second layer is in the form of a nonwoven layer composed of continuous filaments. The average pore size of pores formed in the first layer is smaller than the average pore size of the pores between the filaments of the second layer. The second layer has functional particles which are embedded in the pores between the filaments of the second layer. The first layer forms a barrier preventing the penetration of particles or functional particles having a size greater than 150 ?m.

Abstract: A nonwoven fabric is made by spinning filaments and depositing them on an upstream mesh belt to form a first nonwoven web thereon. Then this nonwoven web on the upstream mesh belt is preconsolidated with hot air such that the nonwoven web has a strength in a machine direction of 0.5 to 5 N/5 cm. The preconsolidated nonwoven web is then transferred from the upstream mesh belt to a downstream mesh belt and is finally consolidated on the downstream mesh belt. A temperature of an upper surface of the downstream belt is higher than a temperature of an upper surface of the upstream mesh belt.

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

Abstract: Use of polymer composition comprising a first propylene polymer A and a second propylene polymer B for producing crimped multicomponent fiber having a side by side cross-sectional configuration.

Abstract: An apparatus for making a spunbond nonwoven has a spinneret for making bicomponent filaments having an eccentric core-sheath configuration whose sheaths seen axially of the filament have constant thicknesses over at least 20% of their outer surfaces. A mesh belt receives the filaments from the spinneret.

Abstract: A spunbond nonwoven textile is made of endless crimped bicomponent or multicomponent filaments having an eccentric core-sheath configuration. The sheath of the filaments in the filament cross-section has a substantially constant thickness of 0.1 to 5 ?m over at least 20% of the filament outer surface.

Abstract: A laminate is made of a spunbonded nonwoven laminate, by first making first and second spunbonded nonwoven layers of which at least one has crimped bicomponent filaments having a first component based on polypropylene and a second component based on polypropylene. Then at least one spunbonded nonwoven layer is preconsolidated, and finally the first and second spunbonded nonwoven layers are finally consolidated into the spunbonded nonwoven laminate by at least one calender roller such that the laminate has a specific density dependent on its surface density and below a density limit ?G according to the equation ? G = 9 ? cm - 1 ? H ? surface ? density ? g / cm 2 + 0.0393 g / cm 3 .

Abstract: A method of making a nonwoven from continuous filaments is provided. The method comprises the steps of spinning continuous filaments from a spinneret to move along a vertical travel path in a vertical travel direction, cooling and stretching the filaments downstream of the spinneret in a cooler and a stretcher, and depositing the cooled and stretched filaments at a deposition location on a foraminous belt moving horizontally underneath the cooler and stretcher and having an array of openings of which a portion are plugged with a sealing compound to create a partially plugged foraminous belt. The method comprises drawing air downward through unplugged openings in the foraminous belt to stabilize the continuous filaments deposited on the foraminous belt, and pre-consolidating the deposited nonwoven into final form.

Abstract: A laminate has first and second spunbonded nonwoven layers at least one of which comprises or consists essentially of crimped continuous filaments that are bicomponent filaments having a first component based on polypropylene and a second component based on polypropylene. A specific density ? (g/cm3) of the spunbonded nonwoven laminate depending on the surface density of the spunbonded nonwoven laminate lies below a density limit ?G defined by the following equation: ?G=9 cm?1×surface density g/cm2+0.0393 g/cm3.

Abstract: A nonwoven web is made by displacing an air-permeable mesh-belt conveyor in a horizontal travel direction and spinning and then depositing crimped continuous filaments as a web at a deposit region on the air-permeable mesh-belt conveyor. A first preconsolidation stage is provided downstream of the deposit region and a second preconsolidation separated by a suction gap from the first stage. Air is drawn air through the web and the conveyor at the deposit region at a first predetermined speed, the first and second consolidation stages at a second and third predetermined speeds, and at the suction gap either not at all or at a fourth predetermined equal to at most substantially less than the second predetermined speed.

Abstract: An apparatus for making a spunbond nonwoven laminate having a plurality of spunbond nonwoven layers has a row extending in a travel direction of two, three, or four spinning beams each emitting a multiplicity of multicomponent crimped continuous filaments with the filaments of each beam having a degree of crimp different from that of the filaments of each of the other beams. Respective extruders supply each beam with the components of the respective filaments and respective supply units feed each of the extruders with the respective components. The rate at which the components are supplied to the extruders is adjusted for varying the proportions of the components in each filament. A conveyor extends in the direction below the beams and receives the filaments as respective layers from the respective beams.

Abstract: A spunbond nonwoven laminate has a first spunbond nonwoven layer having crimped filaments formed by a first component on an outer surface of the filaments of the first layer consisting or substantially consisting of a polyolefin and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the first layer. A second outermost spunbond nonwoven layer on the first layer having filaments as a cover layer and formed by a first component on an outer surface of the filaments of the second layer consisting or substantially consisting of a polyolefin, and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the second layer.

Abstract: A spunbond nonwoven laminate has a plurality of stacked spunbond nonwoven layers, namely at least two and at most four spunbond nonwoven layers that have crimped continuous filaments or consist of crimped continuous filaments. The degree of crimping of the filaments is different in each of these spunbond nonwoven layers, and each of the crimped filaments of the spunbond nonwoven layers has a crimp with at least two, preferably at least three, and more preferably with at least four loops per centimeter of length. The crimped filaments of the spunbond nonwoven layers are multicomponent filaments, particularly bicomponent filaments, with a first plastic component and a second plastic component present in the respective filament in a proportion of at least 10 wt %.

Abstract: A spunbond nonwoven laminate has a first spunbond nonwoven layer having crimped filaments formed by a first component on an outer surface of the filaments of the first layer consisting or substantially consisting of a polyolefin and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the first layer. A second outermost spunbond nonwoven layer on the first layer having filaments as a cover layer and formed by a first component on an outer surface of the filaments of the second layer consisting or substantially consisting of a polyolefin, and a second component consisting or substantially consisting of a plastic having a higher melting point than the polyolefin of the first component of the filaments of the second layer.

Abstract: The invention relates to a spunbonded fabric of endless filaments made of thermoplastic plastic, wherein the endless filaments are designed as multi-component filaments having a core/sheath configuration. The filaments contain at least one lubricant, the lubricant being present exclusively or at least to 90 wt. % in the core component. The mass ratio between the core component and the sheath component is 65:35 to 80:20. The proportion of the lubricant is 250 to 5500 ppm with respect to the total filament.

Abstract: A method of making a nonwoven from continuous filaments is provided. The method comprises the steps of spinning continuous filaments from a spinneret to move along a vertical travel path in a vertical travel direction, cooling and stretching the filaments downstream of the spinneret in a cooler and a stretcher, and depositing the cooled and stretched filaments at a deposition location on a foraminous belt moving horizontally underneath the cooler and stretcher and having an array of openings of which a portion are plugged with a sealing compound to create a partially plugged foraminous belt. The method comprises drawing air downward through unplugged openings in the foraminous belt to stabilize the continuous filaments deposited on the foraminous belt, and pre-consolidating the deposited nonwoven into final form.

Abstract: A nonwoven web is made by displacing an air-permeable mesh-belt conveyor in a horizontal travel direction and spinning and then depositing crimped continuous filaments as a web at a deposit region on the air-permeable mesh-belt conveyor. A first preconsolidation stage is provided downstream of the deposit region and a second preconsolidation separated by a suction gap from the first stage. Air is drawn air through the web and the conveyor at the deposit region at a first predetermined speed, the first and second consolidation stages at a second and third predetermined speeds, and at the suction gap either not at all or at a fourth predetermined equal to at most substantially less than the second predetermined speed.