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EP1250482B2 - Method and device for production of composite non-woven fibre fabrics by means of hydrodynamic needling - Google Patents
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EP1250482B2 - 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
EP1250482B2
EP1250482B2 EP01911482A EP01911482A EP1250482B2 EP 1250482 B2 EP1250482 B2 EP 1250482B2 EP 01911482 A EP01911482 A EP 01911482A EP 01911482 A EP01911482 A EP 01911482A EP 1250482 B2 EP1250482 B2 EP 1250482B2
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EP
European Patent Office
Prior art keywords
web
layer
woven fabric
bonded
spunlacing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01911482A
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German (de)
French (fr)
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EP1250482A2 (en
EP1250482B1 (en
Inventor
Gerold Fleissner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Priority claimed from DE10004448A external-priority patent/DE10004448A1/en
Application filed by Fleissner GmbH filed Critical Fleissner GmbH
Priority to DK01911482T priority Critical patent/DK1250482T4/en
Publication of EP1250482A2 publication Critical patent/EP1250482A2/en
Publication of EP1250482B1 publication Critical patent/EP1250482B1/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 has for its object to find a method and the associated device, with which this easy endurenverschl angraph is improved and yet a good binding of the pulp fibers in the carrier fabric can be achieved. In addition, care must be taken that the pulp layer applied does not lose or lose a little when effectively bonded to the carrier fleece.
  • the spunbonded nonwoven is calendered prior to coating with the superabsorbent material for preconsolidation, then abandoned the Woodpulp Anlagen with a carded web layer and this together with a hydrodynamic water needling solidified and then dried.
  • Solidification of the calendering of the continuous fiber web prior to further processing not only improves the abrasion resistance of the final product, but also reduces pulp loss in the water kernel in and through the web. It should be noted, however, that this calendering is not too strong. If the solidification is too high, the bonding points are too varied, then a connection of the pulp layer by the water needling with the calendered web is difficult.
  • the fleece at the end of the binding process after drying can be calendered again, whereby a solid involvement of all surface fibers can be achieved.
  • the roller adjacent to the spunbond layer needs to be heated.
  • the pulp layer is hydrodynamically bonded to the web in this manufacturing process, otherwise the product can not be used in practice because of film formation. According to the invention, it is provided that a further preconsolidated carded web is applied to the pulp layer and only the three layers are needled together hydrodynamically. Even then, a final calendering is an advantage.
  • the upper cover fleece 12 should also be pre-consolidated with a calender 11.
  • said water needling takes place, which in this embodiment may also be multi-step from both sides, since the pulp layer is provided on both sides by a pulp layer Fleece is covered.
  • the subsequent drying takes place here with another type of fürbeblcommunungstrockner 9, the screen drum 9 ', the fan is assigned externally.
  • the calender 15, 16 can be run through, but then both rollers 15, 16 are to be heated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)

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.By the EP-A-0 333 209 It is known to hydrodynamically interconnect elastomeric continuous fibers together with Woodpulpfasern and thereby solidify the composite nonwoven. In this solidification process there is a risk that a large number of pulp fibers is washed out of the system, so lost fibers. In addition, it has been found in practice that the outer layer of such a composite nonwoven fabric has a Pillingneigung, as shown in the WO 90/04066 is described. To improve is after the EP-A-0 540 041 proposed to hydrodynamically treat the continuous fiber fleece before the pulp fibers are discharged. This should not only give the nonwoven fabric a higher strength, but also improve the capacity of the nonwoven fabric for the pulp fibers to improve the liquid distribution properties. According to this document, the pulp fiber is then merely applied to the needled nonwoven fabric and then dried for connection to the nonwoven fabric or pressed mechanically into the nonwoven fabric.

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 meet practical conditions. In particular, the Pillingneigung the composite nonwovens was complained, including 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 has for its object to find a method and the associated device, with which this easy Oberflächenverschleißfähigkeit is improved and yet a good binding of the pulp fibers in the carrier fabric can be achieved. In addition, care must be taken that the pulp layer applied does not lose or lose a little when effectively bonded to the carrier fleece.

Gelöst wird die Aufgabe durch ein Verfahren nach Anspruch 1 sowie eine Vorrichtung nach Anspruch 4. So ist vorgesehen, dass das Spunbondvlies vor der Beschichtung mit dem superabsorbierenden Material zur Vorverfestigung kalandriert wird, dann die Woodpulpschicht mit einer Krempelvliesschicht aufgegeben und dies 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.The object is achieved by a method according to claim 1 and an apparatus according to claim 4. It is provided that the spunbonded nonwoven is calendered prior to coating with the superabsorbent material for preconsolidation, then abandoned the Woodpulpschicht with a carded web layer and this together with a hydrodynamic water needling solidified and then dried. Solidification of the calendering of the continuous fiber web prior to further processing not only improves the abrasion resistance of the final product, but also reduces pulp loss in the water kernel in and through the web. It should be noted, however, that this calendering is not too strong. If the solidification is too high, the bonding points are too varied, then a connection of the pulp layer by the water needling with the calendered web is difficult. For this reason, to improve the Pillingneigung the fleece at the end of the binding process after drying can be calendered again, whereby a solid involvement of all surface fibers can be achieved. In the case of a nonwoven product with only one spunbond layer, only the roller adjacent to the spunbond layer needs to be heated.

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. Erfindungsgemäß ist vorgesehen, wenn auf die Pulpschicht ein weiteres vorverfestigtes Krempelvlies aufgegeben wird und erst die drei Schichten gemeinsam hydrodynamisch vernadelt werden. Auch dann ist eine Endkalandrierung von Vorteil.It should be noted that the pulp layer is hydrodynamically bonded to the web in this manufacturing process, otherwise the product can not be used in practice because of film formation. According to the invention, it is provided that a further preconsolidated carded web is applied to the pulp layer and only the three layers are needled together hydrodynamically. Even then, a final calendering is an advantage.

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, welche nicht unter Anspruch 1 bzw. 4 fällt,
Fig. 2
ebenfalls in der Seitenansicht die Anlage nach Fig. 1 ergänzt durch die Zuführung einer zusätzlichen Deckschicht aus einem Endlosfaservlies vor der Wasservernadelung.
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 nonwoven with only a carrier pad, which does not fall under claim 1 or 4,
Fig. 2
likewise in the side view the plant after Fig. 1 supplemented by the supply of an additional cover layer of a continuous fiber fleece before the water needling.

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 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.The continuous from the device 1, which is essentially known and need not be shown in detail, continuously emerging endless fibers 2 meet the bottom leading endless belt 3, which leads in the direction of arrow 4. This endless belt 3 is associated with a calender 5, which supplies as desired with energy and heat a possibly also finely embossed consolidated nonwoven. The solidification effect should only be small so that the pulp still forms an intimate bond with the continuous fiber fleece by means of needling. As is known, the task of the pulp fiber z. B. with a device 6 after EP-A-0 032 772 , Both nonwoven layers together are then applied for connection to the hydrodynamic needling 7, which instead of 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 apparatus 8, the screen drums of the fan is assigned directly to the front side. Finally, a further calendering 15, 16 should be done, but here one with higher energy. The solidification must be so intense that a higher, satisfactory abrasion resistance on the final product is produced. In the example below Fig. 1 only needs the roller 16, which has contact with the spunbond nonwoven, to be heated.

Die Kontinueanlage nach Fig. 2 entspricht der nach Fig. 1. 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 continuum plant after Fig. 2 corresponds to the Fig. 1 , In any case, the upper cover fleece 12 should also be pre-consolidated with a calender 11. After the cover fleece 12 is deposited on the pulp layer applied to device 6 on the base fleece from device 1, 5, said water needling takes place, which in this embodiment may also be multi-step from both sides, since the pulp layer is provided on both sides by a pulp layer Fleece is covered. Serve consecutively needling drums 13, 14, which are meandering around and each associated with the indicated by the arrows nozzle bars from above. The subsequent drying takes place here with another type of Durchbeblüftungstrockner 9, the screen drum 9 ', the fan is assigned externally. Finally, here too, the calender 15, 16 can be run through, but then both rollers 15, 16 are to be heated.

Claims (4)

  1. Process for fabrication of a composite web from at least one spunbond web as carrier web and a layer of woodpulp applied onto this carrier web to obtain a hygiene product in which, before applying the super-absorbent material, the spunbond web is consolidated by calendering in dry condition for initial bonding, while the woodpulp layer is applied afterwards,
    and before the step of spunlace bonding, the two-part composite web is provided with a cover layer on top of the super-absorbent material,
    with the cover layer consisting of a pre-bonded calendered carding web,
    and everything together is bonded by hydrodynamic spunlacing and subsequently dried.
  2. Process in conformity with claim 1,
    characterized in that pre-bonding like calendering is done before spunlacing, with the fibers of the carrier web being only slightly bonded.
  3. Process in conformity with one of claims 1-2,
    characterized in that
    the dried composite web is calendered again, but with a higher energy.
  4. Device for producing a hygiene product from a spunbond web with a super-absorbent material layer and carrying out a process in conformity with one of claims 1-3, consisting of
    a) a spunbonding device (1, 2; 10; 1'-4'),
    b) an calendering device (5, 11),
    e) an immediately following device (6) for applying a woodpulp layer onto the pre-bonded carrier web,
    f) a spunlacing system whose water jets are directed onto the woodpulp layer,
    g) a dryer (8, 9)
    h) possibly another calendering device,
    while, for the formation of a top layer,
    c) a carding device (10) is placed in front of the hydrodynamic spunlacing device (1, 2, 5),
    d) followed by a calendering device (11) as bonding device before the spunlacing device (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)

Application Number Priority Date Filing Date Title
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 Method and device for producing composite nonwovens by means of hydrodynamic needling
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

Publications (3)

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

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EP01911482A Expired - Lifetime EP1250482B2 (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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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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CA2392835A1 (en) 2001-07-26
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BR0107640B1 (en) 2011-07-12
WO2001053588A2 (en) 2001-07-26
EP1250482A2 (en) 2002-10-23
EP1250482B1 (en) 2005-04-13
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US6836938B2 (en) 2005-01-04
BR0107640A (en) 2002-10-08
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