EP1250482B1 - Method and device for production of composite non-woven fibre fabrics by means of hydrodynamic needling - Google Patents

Method and device for production of composite non-woven fibre fabrics by means of hydrodynamic needling Download PDF

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Publication number
EP1250482B1
EP1250482B1 EP01911482A EP01911482A EP1250482B1 EP 1250482 B1 EP1250482 B1 EP 1250482B1 EP 01911482 A EP01911482 A EP 01911482A EP 01911482 A EP01911482 A EP 01911482A EP 1250482 B1 EP1250482 B1 EP 1250482B1
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EP
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Prior art keywords
woven fabric
spun
strengthening
layer
bonded non
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EP01911482A
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German (de)
French (fr)
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EP1250482B2 (en
EP1250482A2 (en
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Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Priority claimed from DE10004448A external-priority patent/DE10004448A1/en
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    • 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
    • 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
    • D04H1/48—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 in combination with at least one other method of consolidation
    • D04H1/49—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 in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • 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
    • D04H1/498—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 entanglement of layered webs
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • 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
    • D04H13/00—Other non-woven fabrics
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/08—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of fibres or yarns

Definitions

  • the invention is based on the object, a method and the associated device to find with which this easy surface wear ability improves is still achievable and good binding of the pulp fibers in the carrier nonwoven. Furthermore Care should be taken to ensure that the pulp layer applied is effective Do not connect or get lost with the carrier fleece.
  • the invention provides the solution of the problem in that the spunbonded nonwoven before coating with the superabsorbent Pre-consolidated material, as needled with air or calendered for preconsolidation is abandoned, then the Woodpulp slaughter and both together with a solidified hydrodynamic water needling and then dried.
  • the Solidification of the calendering of the continuous fiber fleece before further processing not only improves the abrasion resistance of the final product but also reduces it a pulp loss in Wasservernadein in and through the web through. But it is to note that this calendering is not too strong. Is the solidification too high, the binding points are too diverse, then is a compound of the pulp layer made difficult by the water needling with the calendered fleece.
  • the fleece at the end of Binding process after drying can be calendered once again, creating a firm integration of all surface fibers can be achieved.
  • the Spunbond layer is adjacent.
  • FIG. 1 also on a permeable drum according to FIG. 2 can be carried out.
  • the drying process on a screen drum device 8, 9 with aeration follows.
  • the device 8 is the screening drums of the Fan directly assigned to the front.
  • the solidification must be so be intense that a higher, satisfactory abrasion resistance on the final product arises.
  • only the roller 16, with the Spunbondvlies Touch has to be heated.
  • the continuation system according to FIG. 2 corresponds to that of FIG. 1, there is only one second, only slightly pre-consolidated endless fiber fleece 12 produced with the device 10, which of course also presented with a role, not shown, so prefabricated can.
  • This also applies to the carrier fleece according to Fig. 1 with the device 1 - 4. Anyhow the upper cover fleece 12 should also be pre-consolidated with a calender 11 be.
  • the unit 10 would represent a device like it is denoted by the reference numerals 1 '- 4', while in place of the carding a Spunbond observed similar as denoted by the reference numerals 1, 2 arranged is.

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.

Description

Durch die EP-A-0 333 209 ist es bekannt, elastomere Endlosfasern zusammen mit Woodpulpfasern hydrodynamisch miteinander zu verbinden und dadurch das Verbundvlies zu verfestigen. Bei diesem Verfestigungsverfahren besteht die Gefahr, dass eine große Anzahl der Pulpfasern aus dem System ausgewaschen wird, also Fasern verloren gehen. Außerdem ist in der Praxis festgestellt worden, dass auch die Außenschicht eines solchen Verbundvlieses eine Pillingneigung aufweist, wie es in der WO 90/04066 beschrieben ist. Zur Verbesserung ist nach der EP-A-0 540 041 vorgeschlagen, das Endlosfaservlies vor der Aufgabe der Pulpfasern hydrodynamisch zu behandeln. Dies soll dem Vlies nicht nur eine höhere Festigkeit geben, sondern die Aufnahmefähigkeit des Vlieses für die Pulpfasern, die Flüssigkeitsverteileigenschaften verbessern. Nach dieser Schrift wird dann die Pulpfaser auf das vernadelte Vlies lediglich aufgegeben und dann zur Verbindung mit dem Vlies getrocknet oder mechanisch in das Vlies gedrückt.From EP-A-0 333 209 it is known to use continuous elastomeric fibers together with Woodpulp fibers hydrodynamically connect to each other and thereby the composite nonwoven to solidify. In this solidification process, there is a risk that a large number of pulp fibers is washed out of the system, so lost fibers walk. In addition, it has been found in practice that the outer layer of such a composite nonwoven fabric has a tendency to pilling, as described in WO 90/04066 is described. For the improvement is proposed according to EP-A-0 540 041, the Endlosfaservlies before the task of the pulp fibers to treat hydrodynamically. This should give the fleece not only a higher strength, but the absorption capacity of the nonwoven fabric for the pulp fibers, which improve liquid distribution properties. To this writing is then given the pulp fiber on the needled mat only and then dried to bond to the web or mechanically pressed into the web.

Es konnte festgestellt werden, dass all diese Herstellungsarten von Vliesprodukten den Bedingungen in der Praxis nicht gerecht werden. Insbesondere die Pillingneigung der Verbundvliese wurde beklagt, und zwar auch der Außenseite des Endlosfaservlieses.It has been found that all these types of nonwoven fabric production do not live up to the conditions in practice. In particular, the pilling inclination the composite nonwoven was complained, and also the outside of the continuous fiber fleece.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und die dazu gehörige Vorrichtung zu finden, mit dem diese leichte Oberflächenverschleißfähigkeit verbessert wird und dennoch eine gute Bindung der Pulpfasern im Trägervlies erzielbar ist. Außerdem ist darauf zu achten, dass die aufgegebene Pulpschicht beim wirkungsvollen Verbinden mit dem Trägervlies nicht oder wenig verloren gehen.The invention is based on the object, a method and the associated device to find with which this easy surface wear ability improves is still achievable and good binding of the pulp fibers in the carrier nonwoven. Furthermore Care should be taken to ensure that the pulp layer applied is effective Do not connect or get lost with the carrier fleece.

Ausgehend von der EP-A-0 540 041 sieht die Erfindung die Lösung der gestellten Aufgabe darin, dass das Spunbondvlies vor der Beschichtung mit dem superabsorbierenden Material vorverfestigt, wie mit Luft vernadelt oder zur Vorverfestigung kalandriert wird, dann die Woodpulpschicht aufgegeben und beides zusammen mit einer hydrodynamischen Wasservernadelung verfestigt und dann getrocknet wird. Die Verfestigung des Kalandrierens des Endlosfaservlieses vor der Weiterverarbeitung verbessert nicht nur die Abriebfestigkeit des Endproduktes, sondern vermindert auch einen Pulpverlust beim Wasservernadein in und durch das Vlies hindurch. Es ist aber zu beachten, dass diese Kalandrierung nicht zu stark erfolgt. Ist die Verfestigung zu hoch, sind die Bindepunkte zu vielfältig, dann ist eine Verbindung der Pulpschicht durch die Wasservernadelung mit dem kalandrierten Vlies erschwert. Aus diesem Grunde kann zur Besserung der Pillingneigung das Vlies am Ende des Bindeverfahrens nach dem Trocknen noch einmal kalandriert werden, wodurch eine feste Einbindung aller Oberflächenfasern erreichbar ist. Im Falle eines Vliesproduktes mit nur einer Spunbondschicht braucht nur die Walze aufgeheizt zu werden, die der Spunbondschicht benachbart ist.Based on EP-A-0 540 041, the invention provides the solution of the problem in that the spunbonded nonwoven before coating with the superabsorbent Pre-consolidated material, as needled with air or calendered for preconsolidation is abandoned, then the Woodpulpschicht and both together with a solidified hydrodynamic water needling and then dried. The Solidification of the calendering of the continuous fiber fleece before further processing not only improves the abrasion resistance of the final product but also reduces it a pulp loss in Wasservernadein in and through the web through. But it is to note that this calendering is not too strong. Is the solidification too high, the binding points are too diverse, then is a compound of the pulp layer made difficult by the water needling with the calendered fleece. For this Basically, to improve the Pillingneigung the fleece at the end of Binding process after drying can be calendered once again, creating a firm integration of all surface fibers can be achieved. In the case of a nonwoven product with only one spunbond layer, only the roller to be heated, the Spunbond layer is adjacent.

Es ist festzuhalten, dass die Pulpschicht bei diesem Herstellungsverfahren hydrodynamisch mit dem Vlies verbunden wird, ansonsten kann das Produkt wegen einer Schichtbildung in der Praxis nicht bestehen. Besser ist es noch, wenn auf die Pulpschicht ein weiteres vorverfestigtes Endlosfaser- oder Krempelvlies aufgegeben wird und erst die drei Schichten gemeinsam hydrodynamisch vernadelt werden. Auch dann ist eine Endkalandrierung von Vorteil. Es ist auch vorteilhaft statt eines Endlosfaservlieses ein kalandriertes Krempelvlies als Trägervlies zu verwenden, dem dann als Deckschicht ein Spunbondvlies aufgelegt wird.It should be noted that the pulp layer in this manufacturing process hydrodynamic is connected to the fleece, otherwise the product can because of a Stratification in practice does not exist. It is still better if on the Pulpschicht abandoned another pre-consolidated continuous filament or carded web and only the three layers are hydrodynamically needled together. Also then an end calendering is an advantage. It is also advantageous instead of a continuous fiber fleece to use a calendered carded web as a carrier fleece, then As a cover layer, a spunbonded nonwoven is applied.

Eine entsprechende Vorrichtung zur Durchführung des Verfahrens ist in der Zeichnung schematisch dargestellt: Es zeigen:

Fig. 1
In der Seitenansicht eine Kontinueanlage zur Herstellung eines Verbundvlieses nur mit einer Trägerunterlage,
Fig. 2
ebenfalls in der Seitenansicht die Anlage nach Fig. 1 ergänzt durch die Zuführung einer zusätzlichen Deckschicht aus einem Endlosfaservlies vor der Wasservernadelung und
Fig. 3
eine Anlage nach Fig. 2 jedoch mit einer Krempelanlage am Einlauf zur Herstellung eines Krempelvlieses als Trägerschicht.
A corresponding device for carrying out the method is shown schematically in the drawing:
Fig. 1
In the side view, a continuous system for the production of a composite fleece with only a carrier pad,
Fig. 2
also in the side view of the plant of FIG. 1 supplemented by the supply of an additional cover layer of a continuous fiber fleece before the water needling and
Fig. 3
a plant according to FIG. 2, however, with a carding machine at the inlet for producing a carded web as a carrier layer.

Die aus der Vorrichtung 1, die im wesentlichen bekannt ist und im einzelnen nicht dargestellt zu werden braucht, kontinuierlich austretenden Endlosfasern 2 treffen auf das unten vorlaufende Endlosband 3, das in Richtung des Pfeils 4 vorläuft. Diesem Endlosband 3 ist ein Kalanderwerk 5 zugeordnet, das je nach Wunsch mit Energie und Wärme ein ggf. auch fein geprägtes verfestigtes Vlies liefert. Die Kalandereinrichtung kann auch durch eine hier nicht dargestellte Luftverfestigungseinrichtung ersetzt werden. Die Verfestigungswirkung sollte nur gering sein, damit der Pulp mittels der Vernadelung noch eine innige Verbindung mit dem Endlosfaservlies eingeht. Nach diesem Verfahrensschritt erfolgt wie bekannt die Aufgabe der Pulpfaser z. B. mit einer Vorrichtung 6 nach der EP-A-0 032 772. Beide Vliesschichten zusammen werden dann zur Verbindung mit der hydrodynamischen Vernadelung 7 beaufschlagt, die statt auf einem Endlosband gemäß Fig. 1 auch auf einer durchlässigen Trommel gemäß Fig. 2 durchgeführt werden kann. Der Trockenvorgang auf einer Siebtrommelvorrichtung 8, 9 mit Durchbelüftung schließt sich an. Bei der Vorrichtung 8 ist den Siebtrommeln der Ventilator direkt stirnseitig zugeordnet. Letztlich sollte noch eine weiter Kalandrierung 15, 16 erfolgen, hier jedoch eine mit höherer Energie. Die Verfestigung muss so intensiv sein, dass eine höhere, zufriedenstellende Abriebfestigkeit am Endprodukt entsteht. Im Beispiel nach Fig. 1 braucht nur die Walze 16, die mit dem Spunbondvlies Berührung hat, beheizt zu werden.From the device 1, which is substantially known and not shown in detail to be continuous, emerging continuous filaments 2 hit the below leading endless belt 3, which leads in the direction of arrow 4. This endless band 3 is assigned a Kalanderwerk 5, which is as desired with energy and Heat possibly also finely embossed solidified fleece supplies. The calender device can also be replaced by a not shown here Luftverfestigungseinrichtung become. The solidification effect should be low, so that the pulp by means of Needling still receives an intimate connection with the continuous fiber fleece. To As is known, the task of the pulp fiber z. B. with a Device 6 according to EP-A-0 032 772. Both nonwoven layers together then become for connection to the hydrodynamic needling 7 acted instead on an endless belt according to FIG. 1 also on a permeable drum according to FIG. 2 can be carried out. The drying process on a screen drum device 8, 9 with aeration follows. In the device 8 is the screening drums of the Fan directly assigned to the front. Finally, there should be a further calendering 15, 16, but here one with higher energy. The solidification must be so be intense that a higher, satisfactory abrasion resistance on the final product arises. In the example of Fig. 1, only the roller 16, with the Spunbondvlies Touch has to be heated.

Die Kontinueanlage nach Fig. 2 entspricht der nach Fig. 1, es wird dort nur noch ein zweites, nur leicht vorverfestigtes Endlosfaservlies 12 mit der Vorrichtung 10 erzeugt, das natürlich auch mit einer nicht dargestellten Rolle vorgelegt, also vorgefertigt werden kann. Dies gilt auch für das Trägervlies nach Fig. 1 mit der Einrichtung 1 - 4. Jedenfalls soll das obere Abdeckvlies 12 ebenfalls mit einem Kalander 11 vorverfestigt sein. Nachdem das Abdeckvlies 12 auf die mit der Einrichtung 6 auf das Grundvlies aus der Vorrichtung 1, 5 aufgelegte Pulpschicht abgelegt ist, erfolgt die genannte Wasservernadelung, die in diesem Ausführungsbeispiel auch von beiden Seiten ggf. auch mehrstufig erfolgen kann, da die Pulpschicht beidseits durch ein Vlies abgedeckt ist. Dazu dienen hintereinander angeordnete Vernadelungstrommeln 13, 14, die mäanderförmig umfahren werden und denen jeweils die mit den Pfeilen angedeuteten Düsenbalken von oben zugeordnet sind. Die sich anschließenden Trocknung erfolgt hier mit einer anderen Art von Durchbeblüftungstrockner 9, dessen Siebtrommel 9' der Ventilator extern zugeordnet ist. Abschließend kann auch hier der Kalander 15, 16 durchlaufen werden, bei dem dann aber beide Walzen 15, 16 zu beheizen sind.The continuation system according to FIG. 2 corresponds to that of FIG. 1, there is only one second, only slightly pre-consolidated endless fiber fleece 12 produced with the device 10, which of course also presented with a role, not shown, so prefabricated can. This also applies to the carrier fleece according to Fig. 1 with the device 1 - 4. Anyhow the upper cover fleece 12 should also be pre-consolidated with a calender 11 be. After the cover fleece 12 on the device 6 with the base fleece filed from the device 1, 5 pulp layer is stored, said Water needling, which in this embodiment also from both sides if necessary can also be multi-stage, since the pulp layer covered on both sides by a fleece is. Serve consecutively arranged needling drums 13, 14, the meandering are bypassed and each of which indicated by the arrows nozzle bars are assigned from above. The subsequent drying takes place here with another type of through-air dryer 9, the screening drum 9 'of the Fan is assigned externally. Finally, here also the calender 15, 16 be run through, but then both rollers 15, 16 are to be heated.

Bisher wurde nur die Herstellung eines Spunbondvlieses für die nachfolgende Kalandrierung diskutiert. Selbstverständlich kann man statt eines Spunbondvlieses auch ein Krempelvlies als Trägerschicht herstellen, dieses kalandrieren 5 und damit vorverfestigten und auf dieses Vlies die Pulpschicht 6 aufgeben. Dies ist in der Fig. 3 dargestellt. Dazu dient als Vlieslegeeinrichtung eine Krempel 1' - 4'. Die Krempel besteht aus einem Kastenspeiser 1' mit einer darunter angeordneten Schüttelrutsche 2', die die gleichmäßig über die Breite ausgebreiteten Fasern der Krempel mit den Kratz- und Reißwalzen 3' übergibt. Das folgende Endlosband 4' übergibt das gelegte Krempelvlies an die Kalandereinrichtung 5 wie weiter oben beschrieben. Als Deckschicht 12 kommt dann nach der Pulpschicht ein Spundbondvlies in Frage, das in der schematisch dargestellten Einheit 10 gebildet werden kann. Genauso kann auch der Bedarf entstehen, als Trägervlies ein Spunbondvlies zu verwenden, dem nach der Pulpschicht ein Krempelvlies aufgelegt wird. Dann würde also die Einheit 10 eine Vorrichtung darstellen wie sie mit den Bezugszeichen 1' - 4' bezeichnet ist, während an die Stelle der Krempel eine Spunbondeinrichtung ähnlich wie mit den Bezugszeichen 1, 2 bezeichnet angeordnet ist.So far, only the production of a Spunbondvlieses for the subsequent calendering discussed. Of course you can instead of a Spunbond fleece produce a carded web as a carrier layer, this calendering 5 and thus pre-consolidated and give the pulp layer 6 on this fleece. This is shown in FIG. 3. Serves as a fleece laying a carding 1 '- 4'. The clutter exists from a box feeder 1 'with an underlying Schüttelrutsche 2', the the evenly spread across the width fibers of the carding with the scratch and Tear rollers 3 'passes. The following endless belt 4 'passes the laid carded web to the calender 5 as described above. As a cover layer 12 comes then after the pulp layer a sheet bond web in question, which in the schematically shown Unit 10 can be formed. Similarly, the need may arise to use a spunbond nonwoven as the carrier fleece, after the pulp layer a carded web is hung up. So then the unit 10 would represent a device like it is denoted by the reference numerals 1 '- 4', while in place of the carding a Spunbondeinrichtung similar as denoted by the reference numerals 1, 2 arranged is.

Claims (11)

  1. Method for producing a composite non-woven fabric from at least one carrier non-woven fabric such as spun-bonded non-woven fabric and a, for example, wood pulp layer applied to this carrier non-woven fabric for the production of a hygiene product, characterised in that the spun-bonded non-woven fabric is compressed in the dry state for pre-strengthening before the coating with the super-absorbent material, the wood pulp layer is then applied and the two together are strengthened with a hydrodynamic water needling process and are then dried.
  2. Method according to claim 1 characterised in that the pre-strengthening, pre-compressing is performed with compressed air.
  3. Method according to claim 1, characterised in that the pre-strengthening, pre-compressing is created through calendering.
  4. Method according to claim 1 - 3, characterised in that a covering layer is applied to the super absorbent material before the step of water needling strengthening onto the two-part composite non-woven fabric.
  5. Method according to claim 4, characterised in that a pre-strengthened and calendered spun-bonded non-woven fabric is also provided as covering layer.
  6. Method according to claim 5, characterised in that a pre-strengthened and calendered card non-woven fabric is provided as covering layer.
  7. Method according to claim 1 to 6, characterised in that the pre-strengthening and calender strengthening is performed before the water needling only lightly binding the fibres of the carrier non-woven fabric.
  8. Method according to one of the claims 1 - 7, characterised in that the dried composite non-woven fabric is calendered again, however this time with greater force.
  9. Method more especially according to one of the preceding claims, characterised in that a calendered card non-woven fabric is initially formed as carrier non-woven fabric, onto which a spun-bonded non-woven fabric is applied as covering layer after the pulp layer.
  10. Device for the production of a hygiene product formed from spun-bonded non-woven fabric together with a super absorbent material layer for the performance of the method according to one of claims 1 - 9, comprising
    a) a spun-bonding or carding apparatus (1, 2: 10, 14'),
    b) a compressed air strengthening or calendering apparatus (5, 11),
    e) where applicable, a directly connected apparatus (6) for applying a wood pulp layer onto the pre-strengthened carrier non-woven fabric,
    f) a water needling apparatus (7: 13, 14), the water jets of which are aligned towards the wood pulp layer.
    g) a drier (8, 9) and
    h) where applicable, another pre-strengthening and calendering apparatus (15, 16).
  11. Device according to claim 10, characterised in that upstream of the hydrodynamic water needling apparatus (1, 2, 5), for forming a covering layer, there is another
    c) spun-bonding or carding apparatus (10), which
    d) is followed by a strengthening and calendering apparatus (11) upstream of the water needling apparatus (13, 14).
EP01911482A 2000-01-17 2001-01-13 Method and device for production of composite non-woven fibre fabrics by means of hydrodynamic needling Expired - Lifetime EP1250482B2 (en)

Priority Applications (1)

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DK01911482T DK1250482T4 (en) 2000-01-17 2001-01-13 Methods and apparatus for the production of composite fabrics by means of hydrodynamic filtration

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10001723 2000-01-17
DE10001723 2000-01-17
DE10004448A DE10004448A1 (en) 2000-01-17 2000-02-03 Making composite non-woven, e.g. for sanitary products, involves calendering a support layer, applying a wood pulp layer and needle punching with water jets
DE10004448 2000-02-03
PCT/EP2001/000383 WO2001053588A2 (en) 2000-01-17 2001-01-13 Method and device for production of composite non-woven fibre fabrics by means of hydrodynamic needling

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EP1250482A2 EP1250482A2 (en) 2002-10-23
EP1250482B1 true EP1250482B1 (en) 2005-04-13
EP1250482B2 EP1250482B2 (en) 2009-06-10

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US (1) US6836938B2 (en)
EP (1) EP1250482B2 (en)
CN (1) CN1395635B (en)
AT (1) ATE293180T1 (en)
BR (1) BR0107640B1 (en)
CA (1) CA2392835C (en)
EA (1) EA004031B1 (en)
ES (1) ES2240423T5 (en)
IL (1) IL150636A0 (en)
WO (1) WO2001053588A2 (en)

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Also Published As

Publication number Publication date
WO2001053588A3 (en) 2002-04-25
ES2240423T3 (en) 2005-10-16
ATE293180T1 (en) 2005-04-15
US20030106195A1 (en) 2003-06-12
CA2392835C (en) 2008-05-27
CA2392835A1 (en) 2001-07-26
BR0107640A (en) 2002-10-08
EP1250482B2 (en) 2009-06-10
IL150636A0 (en) 2003-02-12
EA004031B1 (en) 2003-12-25
ES2240423T5 (en) 2009-11-13
CN1395635B (en) 2010-09-29
CN1395635A (en) 2003-02-05
EP1250482A2 (en) 2002-10-23
WO2001053588A2 (en) 2001-07-26
BR0107640B1 (en) 2011-07-12
EA200200772A1 (en) 2003-02-27
US6836938B2 (en) 2005-01-04

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