EP1039006A1 - Method and apparatus for making perforated nonwovens by means of hydrodynamic needling - Google Patents

Method and apparatus for making perforated nonwovens by means of hydrodynamic needling Download PDF

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Publication number
EP1039006A1
EP1039006A1 EP00105761A EP00105761A EP1039006A1 EP 1039006 A1 EP1039006 A1 EP 1039006A1 EP 00105761 A EP00105761 A EP 00105761A EP 00105761 A EP00105761 A EP 00105761A EP 1039006 A1 EP1039006 A1 EP 1039006A1
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Prior art keywords
fleece
holes
flames
drum
singeing
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EP00105761A
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German (de)
French (fr)
Inventor
Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Individual
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C9/00—Singeing
    • D06C9/02—Singeing by flame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets

Definitions

  • the invention relates to a method for the continuous production of a Holed fleece by the non-perforated nonwoven one is subjected to hydrodynamic needling, in which the holes are displaced of fibers are produced, and then the fleece is at least partially Is subjected to drying.
  • Hole patterns can be produced according to US-A-37 50 237. Then the pre-made, fleece held between two endless webs radially from the outside with hard Water jets are applied to produce a perforated structure.
  • the device consists of an evenly perforated drum, all around by an endless sieve is covered.
  • the endless sieve has open and closed areas, depending on the desired hole structure.
  • the disadvantage of this type of production of the holes is The fact that there are no holes with sharply defined edges can be produced, and in addition individual nonwoven fibers in the manufacture of Holes are pushed towards the drum by the hard water jets.
  • Clearly delimited holes are retrofitted into a pre-made, uniform fleece with the production method according to EP-A-0 215 684, 0 223 614 or 0 273 454 can be introduced.
  • a perforating drum made of a smooth sheet with drainage openings formed on the between the openings evenly across the area distributed plastic elevations are arranged.
  • the plastic elevations can consist of beads open on one side, so that at the same time the drainage openings are formed, or even better from tapering to the top, evenly distributed thorns, between which holes in the drainage openings Sheet are arranged.
  • the water jets hit the fleece Radial from the outside.
  • the drum is made of a metal sheet manufactured on which the mandrels or other plastic elevation only screwed see also US-A-3,034,180.
  • the invention has for its object a method and an implementation this method to find advantageous device with which ultimately this clean hole edge structure on holes in a water-needled fleece can be achieved.
  • a device of the type according to the invention is shown as an example in the drawing.
  • the figure shows in cross section several devices of a plant for Water needling of a fleece for the production of holes, with a Drying device and with a scorching device at the end of the system,
  • the drum 1 consists of a drum wall 5, which is thin and unstable is trained.
  • This drum wall 5 has (according to the above in enlargement cross section shown) on the outside a variety of plastic elevations, like mandrels 6 on.
  • the mandrels 6 are surrounded by drainage openings 7.
  • a such an unstable envelope with a working width of any length is then stable Sieve drum 11 drawn up, but previously on a coarser screen fabric 12 Distance generation between wall 5 and screen drum 11 is applied.
  • In order to the labile wall 5 is solid and immovable all around and also in the radial direction held.
  • the screen drum 11 is used to extract the sprayed on Water under suction, for which purpose a suction pipe 8 inside the drum 1 is arranged centrally, the suction slots 10 extending to the screening drum 1 which, in turn, the water bars 3 are assigned.
  • the fleece 2 'provided with holes on this drum 1 then runs a drying device, for which purpose a ventilation device in the drawing 13 is shown with a screen drum 14 under suction 16. Not in that the area around which the fleece 2 'is wound is the screening drum 14 against the suction draft 16 covered by an inner plate 15.
  • the perforated fleece should be scorched in the holes.
  • a scorching device is shown purely schematically. it consists of a beam 17 extending over the working width, with the flame 18 can be directed against the fleece.
  • Drum 19 there is a on the scorching device Drum 19 shown, initially for cooling, but also for transporting the Fleece should provide.
  • the flames 18 can be directed onto the drum 19, or better in the area in front of the drum 19 on the fleece, so in the not guided Area of the fleece the flames can penetrate better through the holes.
  • the cooling and transport drum 19 can also have a counter drum 21 be assigned, which are also cooled for cooling the other side of the fleece can.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

For the continuous prodn. of a perforated nonwoven, the material is bonded by a hydrodynamic needling action which forms the holes by displacement of the fibers, and the material is dried.. The perforated nonwoven is singed by flames to burn off any fibers across the holes. The material is cooled immediately on both sides after singeing. The flames used for singeing have a controlled intensity to burn off or melt only fibers present across the cross section of the holes. The flame strength is set according to the material weight, by setting the gap between the flames and the material surface. Suction is applied to the other side of the nonwoven, to draw the flames through the holes formed in it. An Independent claim is included for an appts. with a water jet assembly (1-12) to bond the nonwoven (2) and form holes through it, followed by a drying station (13) where the material is at least partially dried. The assembly is extended by a singeing station (17,18) across the width of the nonwoven (2'), with open flames (18) aligned directly at the material (2'). Preferred Features: The beam (17) with the open flames (18) is at a cooled drum (19) which carries the fabric. A further cooling roller (21) is at the drum (19), with the fabric (2') moving between them to be cooled on both sides. The singeing beam (17) is aligned at the unsupported material (2') directly in front of the cooling drum (19). A suction unit (20) is at the opposite side of the material (2') to the singeing station (17,18) to draw air and the flames through the holes in the nonwoven fabric.

Description

Die Erfindung bezieht sich auf ein Verfahren zum kontinuierlichen Herstellen eines mit Löchern versehenen Vlieses, indem das ungelochte Nonwoven einer hydrodynamischer Vernadelung unterworfen wird, bei der die Löcher durch Verdrängen von Fasern hergestellt werden, und anschließend das Vlies einer zumindest teilweisen Trocknung unterworfen wird.The invention relates to a method for the continuous production of a Holed fleece by the non-perforated nonwoven one is subjected to hydrodynamic needling, in which the holes are displaced of fibers are produced, and then the fleece is at least partially Is subjected to drying.

Lochmuster sind nach der US-A-37 50 237 herstellbar. Danach wird das vorgefertigte, zwischen zwei Endlosbahnen gehaltene Vlies radial von außen mit harten Wasserstrahlen zur Herstellung einer Lochstruktur beaufschlagt. Die Vorrichtung besteht aus einer gleichmäßig gelochten Trommel, die rundum von einem Endlossieb bedeckt ist. Das Endlossieb hat offene und geschlossene Bereiche, je nach der gewünschten Lochstruktur. Nachteilig an dieser Herstellungsart der Löcher ist die Tatsache, daß auf diese Weise keine Löcher mit scharf abgegrenzten Kanten hergestellt werden können, und zusätzlich einzelne Vliesfasern bei der Herstellung der Löcher durch die harten Wasserstrahlen in Richtung der Trommel verschoben werden.Hole patterns can be produced according to US-A-37 50 237. Then the pre-made, fleece held between two endless webs radially from the outside with hard Water jets are applied to produce a perforated structure. The device consists of an evenly perforated drum, all around by an endless sieve is covered. The endless sieve has open and closed areas, depending on the desired hole structure. The disadvantage of this type of production of the holes is The fact that there are no holes with sharply defined edges can be produced, and in addition individual nonwoven fibers in the manufacture of Holes are pushed towards the drum by the hard water jets.

Scharf abgegrenzte Löcher sind nachträglich in ein vorgefertigtes gleichmäßiges Vlies mit der Herstellungsart nach den EP-A-0 215 684, 0 223 614 oder 0 273 454 einbringbar. Dort ist jeweils eine Perforiertrommel aus einem glatten Blech mit Drainageöffnungen gebildet, auf der zwischen den Öffnungen gleichmäßig über die Fläche verteilte plastische Erhöhungen angeordnet sind. Die plastischen Erhöhungen können aus halbseitig offenen Sicken bestehen, so daß damit auch gleichzeitig die Drainageöffnungen gebildet sind, oder noch besser aus nach oben spitz zulaufenden, gleichmäßig verteilten Dornen, zwischen denen als Drainageöffnungen Löcher im Blech angeordnet sind. Die Wasserstrahlen treffen auf diese vom Vlies umschlungene Trommel radial von außen. In allen Fällen ist die Trommel aus einem metallnen Blech hergestellt, auf das die Dorne oder die sonstigen plastischen Erhöhung nur geschraubt werden können, siehe dazu auch die US-A-3 034 180.Clearly delimited holes are retrofitted into a pre-made, uniform fleece with the production method according to EP-A-0 215 684, 0 223 614 or 0 273 454 can be introduced. There is a perforating drum made of a smooth sheet with drainage openings formed on the between the openings evenly across the area distributed plastic elevations are arranged. The plastic elevations can consist of beads open on one side, so that at the same time the drainage openings are formed, or even better from tapering to the top, evenly distributed thorns, between which holes in the drainage openings Sheet are arranged. The water jets hit the fleece Radial from the outside. In all cases the drum is made of a metal sheet manufactured on which the mandrels or other plastic elevation only screwed see also US-A-3,034,180.

Die Praxis hat gezeigt, daß - auch abhängig von der jeweils verwendeten Faser des Vlieses - schwerlich randsaubere Löcher in ein vorher gleichmäßig hergestelltes Vlies einbringbar sind, also Löcher, die keinerlei quer über die lochähnlichen Vliesöffnungen gespannte Fasern zeigen.Practice has shown that - also depending on the fiber used in each case Fleece - Hardly clean edges in a previously evenly made fleece can be introduced, i.e. holes that do not cross the hole-like fleece openings show taut fibers.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine zur Durchführung dieses Verfahrens vorteilhafte Vorrichtung zu finden, mit der letztlich dennoch diese saubere Lochrandstruktur an Löchern in einem wasservernadelten Vlies erzielbar ist.The invention has for its object a method and an implementation this method to find advantageous device with which ultimately this clean hole edge structure on holes in a water-needled fleece can be achieved.

Ausgehend von dem üblichen Verfahren zur hydrodynamischen Vernadelung eines Vlieses auf einer Trommel mit darauf vorhandenen plastischen Erhöhungen sieht die Erfindung zur Lösung des Problems vor, daß das mit Löchern versehene Vlies Sengflammen ausgesetzt wird zur nachträglichen Zerstörung von evtl. über den Querschnitt der Löcher noch vorhandenen, quer gespannten Einzelfasern. Wenn also steifere Fasern im Vlies enthalten sein sollten, die durch die Wasservernadelung auf einer Perforiertrommel zumindest nicht dauerhaft in die Randbereiche des jeweiligen Loches verschiebbar sind, dann sollen diese, und zwar allein nur diese über das Loch gespannten Einzelfasern, kurzfristig zum Schmelzen gebracht werden. Die Enden dieser durch Schmelzen zertrennten Einzelfasern ziehen sich selbsttätig in die Randbereiche der Löcher zurück, so daß auf diese Weise saubere Löcher mit der Wasservernadelung kontinuierlich herstellbar sind.Based on the usual procedure for hydrodynamic needling of a She sees fleece on a drum with plastic elevations on it Invention to solve the problem that the perforated fleece Scorching flame is exposed to the subsequent destruction of possibly over the Cross-section of the holes still present, cross-tensioned individual fibers. So if stiffer fibers should be contained in the fleece due to the needling of water a perforating drum at least not permanently in the edge areas of the respective Loches are displaceable, then they should, and only this over the hole tensioned individual fibers can be melted at short notice. The ends of these individual fibers, separated by melting, pull themselves into the Edge areas of the holes back, so that clean holes with the Water needling can be produced continuously.

Es ist sinnvoll, das Vlies während des Sengens, oder besser unmittelbar danach zu kühlen, damit nicht noch andere Fasern des Vlieses unnötig erhitzt werden. Es kann auch vorteilhaft sein, die Flammen der Sengeinrichtung durch die vorher eingebrachten Löcher dringen zu lassen. Dazu sollte das zu sengende Vlies nicht auf einer Unterlage liegen, sondern freihängend geführt sein, aber dann gleich anschließend wieder gekühlt werden. Man kann auch daran denken, die Flammen auf der gegenüberliegenden Seite des Vlieses einem Saugzug zu unterziehen, womit sie mit Sicherheit durch die Löcher zum Schmelzen der dort gespannt gehaltenen Fasern wirksam werden. It makes sense to close the fleece during the scorching, or better immediately afterwards cool so that other fibers of the fleece are not unnecessarily heated. It can also be advantageous, the flames of the scorching device by the previously holes made to penetrate. The fleece to be scorched should not be used for this lie on a pad, but be guided freely, but then immediately then be cooled again. One can also remember the flames on to subject the opposite side of the fleece to a suction, with which it certainly through the holes for melting the fibers held there be effective.

Eine Vorrichtung der erfindungsgemäßen Art ist in der Zeichnung beispielhaft dargestellt. Die Figur zeigt im Querschnitt mehrere Vorrichtungen einer Anlage zum Wasservernadeln eines Vlieses zur Herstellung von Löchern, mit einer Trocknungseinrichtung und mit einer Sengeinrichtung am Ende der Anlage,A device of the type according to the invention is shown as an example in the drawing. The figure shows in cross section several devices of a plant for Water needling of a fleece for the production of holes, with a Drying device and with a scorching device at the end of the system,

In der Zeichnung ist für die Wasservernadelung lediglich eine Trommel 1 dargestellt, der weitere Peripherieteile folgen und vorgeordnet sind, aber wegen der Übersichtlichkeit hier fortgelassen sind. Das im Grunde fertige Vlies 2 überläuft unmittelbar die Trommel 1, der außerhalb ein oder mehrere Düsenbalken 3 unmittelbar zugeordnet sind. Der jeweilige Düsenbalken 3 ist achsparallel zur Trommel 1 angeordnet und an seiner der Trommel 1 zugeordneten Unterseite mit einem hier nicht dargestellten Düsenstreifen zum Austritt der Wasserstrahlen 4 versehen.In the drawing, only a drum 1 is shown for water needling, the other peripheral parts follow and are upstream, but because of Clarity are omitted here. The basically finished fleece 2 overflows immediately the drum 1, the outside one or more nozzle bars 3 immediately assigned. The respective nozzle bar 3 is axially parallel to the drum 1 arranged and on its underside assigned to the drum 1 with a not here provided nozzle strip for the exit of the water jets 4.

Die Trommel 1 besteht aus einer Trommelwandung 5, die dünn und instabil ausgebildet ist. Diese Trommelwandung 5 weist (gemäß dem oberhalb in Vergrößerung dargestelten Querschnitt) auf der Außenseite eine Vielzahl von plastischen Erhöhungen, wie Dorne 6 auf. Die Dorne 6 sind umgeben von Drainageöffnungen 7. Eine solche instabile Hülle in einer Arbeitsbreite beliebiger Länge ist dann auf eine stabile Siebtrommel 11 aufgezogen, auf die aber vorher ein gröberes Siebgewebe 12 zur Abstandserzeugung zwischen Wandung 5 und Siebtrommel 11 aufgebracht ist. Damit ist die labile Wandung 5 rundum und auch in radialer Richtung fest und unverrückbar gehalten. Wie üblich ist die Siebtrommel 11 zum Absaugen des aufgespritzten Wassers unter Saugzug gesetzt, wozu im Inneren der Trommel 1 ein Saugrohr 8 zentrisch angeordnet ist, das zur Siebtrommel 1 sich erstreckende Saugschlitze 10 aufweist, denen wiederum die Wasserbalken 3 zugeordnet sind.The drum 1 consists of a drum wall 5, which is thin and unstable is trained. This drum wall 5 has (according to the above in enlargement cross section shown) on the outside a variety of plastic elevations, like mandrels 6 on. The mandrels 6 are surrounded by drainage openings 7. A such an unstable envelope with a working width of any length is then stable Sieve drum 11 drawn up, but previously on a coarser screen fabric 12 Distance generation between wall 5 and screen drum 11 is applied. In order to the labile wall 5 is solid and immovable all around and also in the radial direction held. As usual, the screen drum 11 is used to extract the sprayed on Water under suction, for which purpose a suction pipe 8 inside the drum 1 is arranged centrally, the suction slots 10 extending to the screening drum 1 which, in turn, the water bars 3 are assigned.

Das auf dieser Trommel 1 mit Löchern versehene Vlies 2' läuft dann anschießend einer Trocknungseinrichtung zu, wozu in der Zeichnung eine Durchlüftungseinrichtung 13 mit einer unter Saugzug 16 stehenden Siebtrommel 14 dargestellt ist. In dem nicht vom Vlies 2' umschlungenen Bereich ist die Siebtrommel 14 gegen den Saugzug 16 durch ein Innenblech 15 abgedeckt.The fleece 2 'provided with holes on this drum 1 then runs a drying device, for which purpose a ventilation device in the drawing 13 is shown with a screen drum 14 under suction 16. Not in that the area around which the fleece 2 'is wound is the screening drum 14 against the suction draft 16 covered by an inner plate 15.

Nach dem Trockenvorgang soll das Lochvlies in den Löchern gesengt werden. Dazu ist in der Zeichnung rein schematisch eine Sengeinrichtung dargestellt. Sie besteht aus einem sich über die Arbeitsbreite erstreckenden Balken 17, mit dem Flammen 18 gegen das Vlies gerichtet werden können. Weiterhin ist an der Sengeinrichtung eine Trommel 19 dargestellt, die zunächst für die Kühlung, aber auch für den Transport des Vlieses sorgen soll. Die Flammen 18 können auf die Trommel 19 gerichtet sein, oder besser in dem Bereich vor der Trommel 19 auf das Vlies, damit in dem nicht geführten Bereich des Vlieses die Flammen besser durch die Löcher dringen können. Man kann auch an einen Saugzug 20 denken, dem die Flammen unterworfen sind.After the drying process, the perforated fleece should be scorched in the holes. Is to in the drawing a scorching device is shown purely schematically. it consists of a beam 17 extending over the working width, with the flame 18 can be directed against the fleece. Furthermore, there is a on the scorching device Drum 19 shown, initially for cooling, but also for transporting the Fleece should provide. The flames 18 can be directed onto the drum 19, or better in the area in front of the drum 19 on the fleece, so in the not guided Area of the fleece the flames can penetrate better through the holes. One can also think of an induced draft 20 to which the flames are subjected.

Der Kühl- und Transporttrommel 19 kann auch noch eine Gegentrommel 21 zugeordnet sein, die zur Kühlung der anderen Seite des Vlieses ebenfalls gekühlt sein kann.The cooling and transport drum 19 can also have a counter drum 21 be assigned, which are also cooled for cooling the other side of the fleece can.

Claims (13)

Verfahren zum kontinuierlichen Herstellen eines mit Löchern versehenen Vlieses, indem das ungelochte Nonwoven einer hydrodynamischer Vernadelung unterworfen wird, bei der die Löcher durch Verdrängen von Fasern hergestellt werden, und anschließend das Vlies einer zumindest teilweisen Trocknung unterworfen wird, dadurch gekennzeichnet, daß das mit Löchern versehene Vlies Sengflammen ausgesetzt wird zur Zerstörung von evtl. über den Querschnitt der Löcher noch vorhandenen, quer gespannten Einzelfasern.Process for the continuous production of a perforated fleece, by the unperforated nonwoven of hydrodynamic needling is subjected to, in which the holes are made by displacing fibers be, and then the fleece of an at least partial drying is subjected to, characterized in that the perforated fleece Scorching flame is exposed to the destruction of possibly over the cross section of the Holes still present, cross-tensioned individual fibers. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Vlies unmittelbar nach dem Sengen gekühlt wird.A method according to claim 1, characterized in that the fleece immediately is cooled after the singeing. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kühlung beidseitig vorgenommen wird.A method according to claim 1 or 2, characterized in that the cooling is made on both sides. Verfahren nach einem der Ansprüche 1 ― 3, dadurch gekennzeichnet, daß die Flammstärke in ihrer Intensität so gesteuert wird, daß sie allein ausreicht, um nur über den Querschnitt der Löcher gespannte Einzelfasern zu schmelzen, zu zertrennen.Method according to one of claims 1-3, characterized in that the Flame strength is controlled in its intensity so that it alone is sufficient to to melt single fibers stretched across the cross section of the holes cut up. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Flammstärke vom Vliesgewicht abhängig gemacht wird.A method according to claim 4, characterized in that the flame strength of Fleece weight is made dependent. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Flammstärke vom Abstand der Flammen zur Oberfläche des Vlieses abhängig gemacht wird. A method according to claim 4 or 5, characterized in that the Flame strength depends on the distance of the flames to the surface of the fleece is made. Verfahren nach einem der Ansprüche 1 ― 6, dadurch gekennzeichnet, daß auf der der Sengeinrichtung gegenüberliegenden Seite des Vlieses ein Saugzug auf die Flammen und damit durch die Löcher einwirkt.Method according to one of claims 1-6, characterized in that on the the side of the fleece opposite the scorching device is a suction on the Flames and thus acts through the holes. Anlage zur Durchführung des Verfahrens nach einem der Ansprüche 1 ― 7 mit einer Wasserstrahl-Vernadelungsvorrichtung (1-12) zur Herstellung von Löchern in ein Nonwoven (2) durch Verdrängen der Fasern in die Seitenbereiche der jeweiligen Löcher und einer Trocknungsvorrichtung (13) zum zumindest teilweisen Trocknen des durch die Wasserstrahlbehandlung nassen Vlieses (2), dadurch gekennzeichnet, daß die Anlage ergänzt ist durch eine sich über die Arbeitsbreite des Vlieses (2') erstreckende Sengvorrichtung (17, 18), deren offene Flammen (18) unmittelbar gegen das Vlies (2') gerichtet sind.Installation for carrying out the method according to one of claims 1-7 with a water jet needling device (1-12) for producing holes into a nonwoven (2) by displacing the fibers in the side areas of the respective holes and a drying device (13) for at least partially Drying the fleece (2) wet by the water jet treatment, thereby characterized that the system is supplemented by a spread over the working width of the fleece (2 ') extending scorching device (17, 18), the open flames (18) are directed directly against the fleece (2 '). Vorrichtung zum Sengen eines Lochvlieses nach Anspruch 8, dadurch gekennzeichnet, daß dem Balken (17) mit den offenen Flammen (18) eine Trommel (20) zugeordnet ist, die auch für den Transport des Vlieses vorgesehen ist.Device for singeing a perforated fleece according to claim 8, characterized characterized in that the beam (17) with the open flames (18) Drum (20) is assigned, which is also provided for the transport of the fleece is. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Trommel (20) gekühlt ist.Device according to claim 9, characterized in that the drum (20) is cooled. Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß der Trommel (20) eine weitere Kühlwalze (21) zugeordnet ist, zwischen denen das Vlies (2') zur beidseitigen Kühlung bewegt ist.Device according to claim 9 or 10, characterized in that the drum (20) a further cooling roller (21) is assigned, between which the fleece (2 ') is moved for cooling on both sides. Vorrichtung nach einem der Ansprüche 9 ― 11, dadurch gekennzeichnet, daß der Sengbalken (17) unmittelbar vor der Kühlwalze (20) dem nicht unterstützten Vlies (2') zugeordnet ist.Device according to one of claims 9 - 11, characterized in that the Sengbalken (17) immediately before the cooling roller (20) the non-supported fleece (2 ') is assigned. Vorrichtung nach einem der Ansprüche 8 ― 12, dadurch gekennzeichnet, daß der Sengeinrichtung (17, 18) auf der gegenüberliegenden Seite des Vlieses (2') eine Einrichtung (20) zur Erzielung eines Saugzuges (Pfeil) zugeordnet ist.Device according to one of claims 8 - 12, characterized in that the Singeing device (17, 18) on the opposite side of the fleece (2 ') Device (20) for achieving suction (arrow) is assigned.
EP00105761A 1999-03-22 2000-03-17 Method and apparatus for making perforated nonwovens by means of hydrodynamic needling Withdrawn EP1039006A1 (en)

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US20020046449A1 (en) 2002-04-25
US6338187B1 (en) 2002-01-15
JP2000303347A (en) 2000-10-31
US6405416B1 (en) 2002-06-18

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