Abstract: Method of producing a composite nonwoven for receiving and storing liquids or the like, comprising a carded nonwoven, which is treated in order to consolidate it, and a pulp layer, such as a wood pulp fiber layer, applied to the consolidated carded nonwoven and brought into secure contact with same, characterized in that the carded nonwoven is consolidated dry before being coated with the super-absorbent material, then the layer formed from the pulp fibers is applied to this pre-consolidated carded nonwoven and everything is interconnected.

Abstract: Known methods involve applying a layer of particularly highly absorbent fibers such as woodpulp on a carrier nonwoven and then compacting the composite nonwoven with the aid of water entanglement. One disadvantage of the compacting method is the high woodpulp fiber loss and the associated purification of the circulating water for the entanglement device. According to the invention, a fine layer of microfibers is initially applied before applying the woodpulp fibers. The microfibers are evenly distributed on the carrier nonwoven using, for instance, a meltblown process and the woodpulp fibers are only then applied in the separating layer. The water during entanglement can no longer merge the woodpulp fibers into the carrier nonwoven due to the fact that the microfibers act as a barrier.

Abstract: Method for producing a composite non-woven fabric for the production of a hygiene product includes the steps of forming a spun-bonded non-woven fabric; compressing the spun-bonded non-woven fabric in the dry state in a continuous process after forming the spun-bonded non-woven fabric for pre-strengthening; coating the pre-strengthened spun-bonded non-woven fabric with a layer of pulp fibers; conducting a hydrodynamic water needling process to interconnect and strengthen the layer of pulp fibers and the pre-strengthened spun-bonded non-woven fabric to form a composite non-woven fabric; and then drying the composite non-woven fabric. The step of compressing the spun-bonded non-woven fabric provides only a light bonding of fibers of the spun-bonded non-woven fabric such that the pulp fibers enter into an internal bonding with fibers of the spun-bonded non-woven fabric in the hydrodynamic water needling process.

Abstract: A not-yet-bonded or only slightly bonded nonwoven staple fiber material cannot be delivered from the nip of a calendar roller pair to a following endless conveyor without support during transport. To provide this support, the invention provides for a supporting rotating element such as an endless conveyor or perforated drum, either of which is designed to be permeated by air from below flowing toward the element. This feature simultaneously achieves a cooling effect.

Abstract: During the construction of the nozzle beam according to DE-A-195 01 738, the insertion slit for the nozzle strip (14) is sealed on the front side of the nozzle beam by means of a screwed cover (16,17). It is easier to exchange a nozzle strip (14) if a special closing unit (26) having an opening (3) for the nozzle strip is provided on the front side, and said opening (30) is closed in a liquid-tight manner by a simply fixed insertion mandrel (31).

Abstract: Colored patterning of a web-shaped nonwoven or a composite made of a nonwoven and a fabric or knit is achieved by water jet needling. The nonwoven provided as the upper layer of two layers is provided with one or more colors or is colored or printed itself and is placed on a second nonwoven or a woven or one that has a different color. Then both layers are subjected to the water jets that displace the fibers, with the colored fibers in the first layer being displaced into the second layer to produce a pattern on the underside of the second layer. It is also possible, instead of colored fibers in the nonwoven of the upper layer, to move them when they are not colored into a second layer that can have any color.

Abstract: A pile carpet after tufting or the like is usually provided on the back with a latex precoat for stabilization and then provided with a foam back or an additional jute fabric. This environmentally hazardous method and the problem of recycling the foam back as well as the latex layer can be avoided if a nonwoven is applied instead to the tufted back of the carpet by water needling. This is possible with water needling in that the solidification of the pile fibers in or on the primary carrier takes place but no nonwoven fibers reach the visible side of the carpet. The back layer to be needled can also be made thicker and more voluminous. Instead of a carpet, any other pile goods can also be stabilized in this fashion.

Abstract: Colored patterning of a web-shaped nonwoven or a composite made of a nonwoven and a fabric or knit is achieved by water jet needling. The nonwoven provided as the upper layer of two layers is provided with one or more colors or is colored or printed itself and is placed on a second nonwoven or a woven or one that has a different color. Then both layers are subjected to the water jets that displace the fibers, with the colored fibers in the first layer being displaced into the second layer to produce a pattern on the underside of the second layer. It is also possible, instead of colored fibers in the nonwoven of the upper layer, to move them when they are not colored into a second layer that can have any color.

Abstract: It is known to produce a colored pattern by a printing process or for example during weaving. The idea according to the invention is to produce a pattern by the water jets of a needling device in which, for colored patterning of a web-shaped nonwoven or a composite made of a nonwoven and a fabric or knit, the webs resting on a substrate moves past a nozzle beam located crosswise to the transport direction and are impacted by the water jets. The nonwoven provided as the upper layer of two layers is provided with one or more colors or is colored or printed itself and is placed on a second nonwoven or a woven or one that has a different color. Then both layers are subjected to the water jets that displace the fibers, with the colored fibers in the first layer being displaced into the second layer to produce a pattern on the underside of the second layer.

Abstract: Device with a nozzle beam for producing fluid streams for striking the fibers of a web of goods by streams. The fluid spraying against the underside of the nozzle beam must be captured. For this purpose, a device is used Fat is located to the side of the nozzle beam over its length. A funnel-shaped slot is provided at the edge of the nozzle beam, at whose inner end a suction slot approximately 2 mm high is formed. If a sufficiently low vacuum is connected to the otherwise completely enclosed device, all of the drops from the underside of the nozzle beam can be sucked up safely for the goods to be needled, including a spray fog.

Abstract: The suction slit between two sliding strips for a transport device transporting the textile material is filled by a cleaning strip which has holes on one side to carry away the fluid to be drawn off and preferably on the other side as well, on the top of a separating strip, to determine the width of the suction slit. In this fashion, the fibers loosened by needling come to rest on the ribs of the holes in the cleaning strip and not on the ribs on the openings in the suction tube and thus can be removed quickly from the suction device by replacing the cleaning strip. In addition, the width of the effective suction slit can be changed quickly by replacing it by another cleaning strip in which the width of one or two separating strips is dimensioned accordingly.

Abstract: A device is known in which the bulky nonwoven arriving on a continuous belt for water needling is slowly compressed between a needling drum and another belt and at the same time is wetted by a first water curtain from the nozzle bank; its water jets first flow through the continuous belt and then the fiber web and ultimately the needling drum. There is a simpler and thus more economically producible device of this type when instead of the needling drum this compacting unit consists only of two continuous belts which however should be guided such that at the inlet the two working sides of the continuous belts slowly compact and press the incoming nonwoven, and then the belts lying on one another are moved past the nozzle bank as they are held pressed. Additional deflection rollers are used for this purpose.

Abstract: A device is known for producing perforated nonwovens by means of hydrodynamic needling, with the perforation consisting primarily of sharply delimited holes in nonwoven of any dimension. The device consists of a smooth drum that supports and transports the nonwoven, said drum being provided with drainage openings to carry away liquid sprayed at high pressure by a nozzle beam from many outlets and having plastic elevations projecting from the plane of the smooth surface for producing the perforations in the nonwoven. The perforated nonwoven that can be produced by this device does not possess uniform strength in all directions. This uniform strength can be achieved simply by distributing the elevations nonuniformly over the drum to produce holes in both dimensions.

Abstract: Bulked and liquid-permeable fleeces are used in the hygienic products industry for diapers and bandages. These fleeces have the purpose of rapidly absorbing fluid secreted from the body, storing it, and slowly giving it up to the absorber located beneath, uniformly over the entire surface of the absorber. As a result of the idea according to the invention, a fleece is formed from shrunk and/or crimped fibers together with non-shrinking man-made fibers, and the fleece is then compacted by a hydrodynamic compacting method without using binders, after which the fleece is dried and the shrinking ability present in the shrinking fibers and/or the crimping ability present in the crimping fibers in latent form are triggered immediately and/or subsequently by the action of temperature. This fleece can be manufactured economically and meets all of the requirements imposed upon it.

Abstract: The air mixer defined herein serves for static mixing of a heated air stream in a flow channel of a circulated air stream upstream of a heat treatment chamber for drying textile goods or tissue webs for example. For this purpose the air mixer is provided with air mixing parts that consist of hollow bodies arranged in the flow cross section of the first air stream with spaces between them, said bodies being provided to receive and conduct the second air stream with inlet openings and outlet nozzles located endwise on one side.

Abstract: A device is known for heat treatment of permeable webs of goods with a housing in which at least one screen roller is mounted and a pumping device is associated endwise with the roller, said pumping device drawing a processing medium in the formal of a vapor and/or gas out of the screen roller, with the through-flow area of the roller, in other words the working width of the screen roller, being capable of being determined by a width-adjusting device on the screen roller. A screen roller of this kind is improved according to the invention ifa) at least in the area covered by the web of goods, it has two coaxially mounted permeable screen roller jackets located with a distance between them,b) a width-adjusting device is provided between the outer and inner screen roller jackets, said devicec) being adjustable by a spindle on the axis of the screen roller, andd) the inner screen roller jacket is made permeable only in the area that corresponds to the minimum working width of the roller.

Abstract: It is known to make a nonwoven from polyvinyl alcohol fibers. The special advantage of these PVA fibers is their ability to dissolve in water. The fleece is therefore mechanically needled for compaction. The invention describes a method that allows hydrodynamic needling as well. Special parameters for further treatment during water needling and during subsequent drying characterize the additional features of the invention.

Abstract: Devices for water needling consists of a nozzle beam that is located transversely above the fiber web to be compacted. The water emerges in fine streams at high pressure from a plurality of nozzles and tangles the fibers to compact them, to change the surface, and to braid the fibers of the tissue or the like. Since this web must be guided past the nozzle beam, a lengthwise striping develops. In order to influence this advantageously, according to the invention the nozzle beam is caused by a vibrator to perform quite specific transverse oscillations. The resultant zigzag movement, with the generated groove depressions being located with their edges adjacent, produces a completely smooth surface without significant plastic elevations.

Abstract: A hollow cylinder is fastened at its outer circumference when the cylindrical interior jacket is to be utilized for a treatment process. To produce this fastening, provision is made according to the invention for surrounding the end of the hollow cylinder by an elastic ring, said ring being pressed against the outer circumference of the hollow cylinder by a clamping disk that is annular and surrounds the hollow cylinder, said disk in turn being nonrotatably connected with the drive unit. The drive unit can then consist exclusively of a bearing ring connected by a gear at its outer circumference with a drive pinion of a motor.

Abstract: The invention describes a device for through-flow continuous processing of textiles, nonwovens, or paper in web form with a gaseous processing medium circulated in the device. The material rests on the outside of a permeable drum subjected to suction, said drum having bottoms on the ends, namely a sieve-type or perforated covering that rests on the drum structure. For this purpose, sheet metal strips firmly connected with the bottoms extend from one bottom to the other between the bottoms of the drum, with the widths of the strips extending in the radial direction. These sheet metal strips are secured over their entire radially aligned height firmly but releasably to the corresponding bottoms by means of the clamping structure.