EP0343331A1 - Apparatus for producing a mat of continuous filaments and the manufacturing of multilayer mat with continuous filaments - Google Patents

Apparatus for producing a mat of continuous filaments and the manufacturing of multilayer mat with continuous filaments Download PDF

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Publication number
EP0343331A1
EP0343331A1 EP89104691A EP89104691A EP0343331A1 EP 0343331 A1 EP0343331 A1 EP 0343331A1 EP 89104691 A EP89104691 A EP 89104691A EP 89104691 A EP89104691 A EP 89104691A EP 0343331 A1 EP0343331 A1 EP 0343331A1
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EP
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Prior art keywords
spinning
continuous filaments
mat
beams
depositing
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Granted
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EP89104691A
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German (de)
French (fr)
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EP0343331B1 (en
Inventor
Heinz-H. Boich
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Corovin GmbH
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Corovin GmbH
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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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/05—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in another pattern, e.g. zig-zag, sinusoidal
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the invention relates to a device for producing a nonwoven from continuous filaments according to the preamble of claim 1, and the invention also relates to a multilayer nonwoven made from continuous filaments.
  • DE-PS 17 85 158, GB-PS 12 82 176 and GB-PS 12 97 582 devices for producing a nonwoven from continuous filaments are already known.
  • a sheet of threads is drawn off from a melt and from spinnerets with the aid of a gaseous propellant, and the individual threads are deposited on a deposit belt to form the fleece.
  • An important quality feature of the nonwovens is their uniformity and strength, the strength or the ratios of the strengths from the longitudinal direction to the transverse direction being essentially determined by the angle of lay of the individual threads - the direction of lay with respect to the direction of production.
  • a separator being associated with each draw-off tube.
  • the separator fulfills the task of separating the filaments from the accelerating air and simultaneously spreading the thread bundle.
  • the spreading angle is also predetermined by this spreading.
  • curtain process In a further device for producing a nonwoven from continuous filaments, the so-called curtain process has already been used, in which the many exhaust pipes mentioned above are dispensed with and also no spreading device (separators) are used.
  • the sheet of thread forming a flat forehand extends perpendicular to the production direction, ie the preferred laying direction runs parallel to the production direction.
  • the higher speed of the filaments in each case relative to the speed of the depositing belt leads to serpentine movements when the filaments are deposited. Individual filaments are then overlaid in certain areas.
  • a fleece produced with such a device does have a preferred strength in the longitudinal direction, that is, in the production direction, but the strength values in the transverse direction are extremely poor.
  • the invention has for its object to provide a device which allows the production of a nonwoven with a high degree of uniformity, and which allows to achieve predetermined strength and elongation values of the nonwoven in the desired directions.
  • the invention achieves this aim in the device mentioned in the preamble of claim 1 by the features of the characterizing part of patent claim 1.
  • the depositing angles can be set to any value, and a particular advantage is that such an adjustment is possible while the device is in operation.
  • a fleece produced with the device according to the invention can have both isotropic properties and preferred longitudinal strengths. Preferred transverse strengths are also possible without impairing the uniformity of the fleece, depending on the choice of the depositing angle.
  • the invention is also intended to create a multilayer nonwoven fabric made from continuous filaments, which has selectable strength values and a high degree of uniformity. That goal the invention ranges according to the features of claim 7.
  • FIG. 1 shows a spinning station, designated as a whole by the reference number 10, which comprises two spinning beams 12 and 14 arranged at a distance from one another in the transport direction 30 (production direction). A melt is fed to the spinning plates 18 via melt lines 16.
  • Each spinning plate 18 is used to distribute the melt over the production width, that is to say the width of a deposit belt 28.
  • the spinning plates 18 are interchangeably attached in the lowest part of the spinning beams 12, 14.
  • In the spinning plate 18 there is a variable number of holes called spinnerets through which the liquid spinning melt emerges from the spinning plate 18 as a sheet 50 in the manner of a curtain.
  • the thread sheet 50 moves along a blowing wall 20 which forms a stretching zone 22 for stretching the thread sheet.
  • the spinning station 10 further comprises, in each of the two spinning beams 12, 14, a thread take-off device 24 and a depositing device 26, by means of which the threads are spread to achieve high uniformity and are deposited on the depositing belt 28 moved in the transport direction 30 to form a fleece 52.
  • the curtain method used here thus works with a spreading device - comparable to the known separators - in order to achieve a specific direction in which the threads are deposited, namely a 90 ° direction, based on the spinning beam.
  • the threads are thus oscillated back and forth up to 90 ° to the spinning beam.
  • the deposit takes place first with the spinning beam 12, and a second layer is deposited on the first layer formed thereby in the other spinning beam 14, whereby a multi-layer fleece 52 is formed.
  • FIG. 2 shows the top view in Fig. 2 it can be seen that the spinning beams 12, 14 from their parallel, dashed position out in the direction of arrows 56 and 58 are pivotable about their axes of rotation 34, the longitudinal axes 32 of the spinning beams 12, 14 forming an angle 54 here.
  • the individual layers of the fleece 52 thus have the different storage directions or storage angles, which are predetermined by the spinning beams 12 and 14. These different storage directions are shown in Figs. 3-5.
  • FIG. 3 shows the course of the deposit 36 of the one spinning beam 12, while FIG. 4 shows the course of the deposit 38 of the other spinning beam 14.
  • the resulting storage image 40 which results from the multilayer nonwoven 52, which is produced by superimposing the storage profiles 36 and 38, is shown in FIG. 5.
  • the individual filing courses intersect, so that there is a cross filing with variable angles for the multilayer fleece. If the intersecting deposition courses 36 and 38 form an angle of 90 ° at the deposition image 40 at the intersection points, an isotropic fleece 52 is obtained with the same strength values in all directions.
  • FIG. 6 shows the spinning beam 12 in a plan view.
  • the spinning beam 12 is - as well like the spinning beam 14 - arranged on a bogie 42 and held and guided along the circular guide rails 44 by means of the guide rollers 46.
  • the guide rails 44 allow the spinning beam 12 to be rotated about the central axis of rotation 34, so that different angles of rotation 48 can be realized.
  • the guidance and mounting of the spinning beam 12 on the guide rails 44 is also illustrated in the perspective illustration according to FIG. 7, and it should be emphasized that the setting of different angles of rotation 48 is also possible during the operation of the entire spinning station 10. In practice, this represents a considerable advantage because it is not necessary to switch off and shut down the spinning station for setting new desired rotation angles 48 and thus for generating new storage images 40. Overall, the spinning station 10 can therefore be operated variably, because a cross deposit with variable angles can be achieved during the ongoing operation of the spinning station. A desired new nonwoven product can therefore be generated immediately during operation.

Abstract

Apparatus for producing a mat of continuous filaments which, under the action of a gaseous propellant, are drawn at high speed in bundle form out of holes in spinneret plates of a spinneret pack and, after passing through a filament take-off apparatus, are deposited by means of a deposition device designed as a spreading device onto a conveyor belt moving in the machine direction. Two spinneret packs are arranged spaced apart in the machine direction, and at least one spinneret pack is rotatable, together with the deposition and spreading device, in a plane which extends parallel to the conveyor belt. In operation, this makes it possible to produce a mat of altered appearance or a new mat product. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung eines Vlieses aus Endlosfäden gemäß dem Oberbegriff des Patentanspruchs 1, und außerdem befaßt sich die Erfin­dung mit einem aus Endlosfäden hergestellten mehrlagi­gem Vlies.The invention relates to a device for producing a nonwoven from continuous filaments according to the preamble of claim 1, and the invention also relates to a multilayer nonwoven made from continuous filaments.

Durch die DE-PS 17 85 158, GB-PS 12 82 176 und GB-PS 12 97 582 sind schon Vorrichtungen zur Herstellung eines Vlieses aus Endlosfäden bekannt. Dabei wird aus einer Schmelze und aus Spinndüsen eine Fadenschar mit Hilfe eines gasförmigen Treibmittels abgezogen, und die ein­zelnen Fäden werden auf einem Ablageband zur Bildung des Vlieses abgelegt.DE-PS 17 85 158, GB-PS 12 82 176 and GB-PS 12 97 582 devices for producing a nonwoven from continuous filaments are already known. A sheet of threads is drawn off from a melt and from spinnerets with the aid of a gaseous propellant, and the individual threads are deposited on a deposit belt to form the fleece.

Ein bedeutendes Qualitätsmerkmal bei den Vliesen sind ihre Gleichmäßigkeit und ihre Festigkeit, wo­bei die Festigkeit bzw. die Verhältnisse der Festig­keiten von Längsrichtung zu Querrichtung im wesent­lichen durch den Ablegewinkel der einzelnen Fäden - Ablegerichtung in Bezug auf die Produktionsrich­tung - bestimmt wird.An important quality feature of the nonwovens is their uniformity and strength, the strength or the ratios of the strengths from the longitudinal direction to the transverse direction being essentially determined by the angle of lay of the individual threads - the direction of lay with respect to the direction of production.

Üblich ist schon die Verwendung von Spinnbalken mit einer Vielzahl von einzelnen Abzugsrohren für die Fäden, wobei jedem Abzugsrohr ein Separator zugeord­net ist. Der Separator erfüllt die Aufgabe, die Fila­mente von der Beschleunigungsluft zu trennen und das Fadenbündel gleichzeitig zu spreizen. Durch diese Spreizung wird zugleich auch der Ablegewinkel vorge­geben.It is already common to use spinning beams with a large number of individual draw-off tubes for the threads, a separator being associated with each draw-off tube. The separator fulfills the task of separating the filaments from the accelerating air and simultaneously spreading the thread bundle. The spreading angle is also predetermined by this spreading.

Bei der Verwendung von Separatoren muß in der Praxis berücksichtigt werden, daß sich die einzelnen Sepa­ratoren wegen der austretenden Beschleunigungsluft gegenseitig stark beeinflussen. Deshalb gibt es hier nur eine einmalig zu wählende günstige Einstellung der Separatoren, durch die dann auch die Ablegerich­tung zwangsläufig vorgegeben ist. Es besteht daher nur eine sehr eingeschränkte Möglichkeit, unterschied­ liche Ablagewinkel zu realisieren.In practice, when using separators, it must be taken into account that the individual separators strongly influence one another because of the emerging accelerating air. That is why there is only a one-off favorable setting of the separators, which then inevitably also specifies the laying direction. There is therefore only a very limited possibility of making a difference to realize storage angles.

Wenn man im übrigen die Winkelstellung der einzel­nen Separatoren tatsächlich geringfügig verändern wollte, um unterschiedliche Ablagewinkel zu ermög­lichen, müßte die gesamte Vorrichtung zunächst ab­geschaltet werden, da solche Änderungen im laufen­den Betrieb einer Anlage nicht möglich sind. Außer­dem sind mit der Änderung der Ablagewinkel erheb­liche Ausschußmengen des produzierten Vlieses ver­bunden.If one actually wanted to change the angular position of the individual separators slightly in order to enable different placement angles, the entire device would first have to be switched off, since such changes are not possible while a system is in operation. In addition, considerable rejects of the nonwoven produced are associated with the change in the deposit angle.

Es ist auch schon vorgeschlagen worden, in Produk­tionsrichtung gesehen zwei Spinnbalken mit Separa­toren im Abstand voneinander anzuordnen, wobei je­dem Spinnbalken eine eigene Ablegerichtung der Fila­mente zugeordnet ist. Man kommt dann zu einer soge­nannten Kreuzablage mit zwei jeweils vorgegebenen Ablagewinkeln.It has also been proposed to arrange two spinning beams with separators at a distance from one another, as seen in the production direction, each spinning beam being assigned its own filing direction. One then arrives at a so-called cross filing with two given filing angles.

Wie voranstehend erwähnt, beeinflussen sich die ein­zelnen Separatoren aber gegenseitig wegen der aus­tretenden Beschleunigungsluft, so daß man nur mit einer einmalig zu wählenden günstigen Einstellungen der Separatoren arbeiten kann, wodurch dann die Ab­ legerichtung zwangsläufig vorbestimmt ist. Somit lassen sich bei dieser vorgeschlagenen Lösung mit zwei Spinnbalken nur begrenzte Ablegerichtungen bei der Kreuzablage realisieren. Im übrigen ist es auch hier bei einer gewünschten Veränderung der Ab­legewinkel erforderlich, die gesamte Vorrichtung zu­nächst abzuschalten, was zu den voranstehend schon genannten Nachteilen führt.As mentioned above, the individual separators influence each other because of the emerging accelerating air, so that you can only work with a one-time favorable settings of the separators, which then the Ab direction is inevitably predetermined. Thus, with this proposed solution with two spinning beams, only limited laying directions can be realized with the cross-laying. Moreover, if the desired placement angle is changed, the entire device must first be switched off, which leads to the disadvantages already mentioned above.

Je nach Verwendungszweck des Vlieses besteht in der Praxis aber ein Bedürfnis nach unterschiedlichen Festigkeitswerten in unterschiedlichen Richtungen, und diesem Bedürfnis kann mit der vorgeschlagenen Lösung mit zwei Spinnbalken nicht nachgekommen wer­den.Depending on the intended use of the fleece, there is a need in practice for different strength values in different directions, and this need cannot be met with the proposed solution with two spinning beams.

Bei einer weiteren Vorrichtung zur Herstellung ei­nes Vlieses aus Endlosfäden ist auch schon das so­genannte Vorhangverfahren zur Anwendung gekommen, bei welchem auf die oben erwähnten vielen Abzugs­rohre verzichtet und auch keine Spreizvorrichtung (Separatoren) verwenden werden. Die einen flächigen Vorhand bildende Fadenschar erstreckt sich senkrecht zur Produktionsrichtung, d.h., die bevorzugte Ab­legerichtung läuft parallel zur Produktionsrichtung.In a further device for producing a nonwoven from continuous filaments, the so-called curtain process has already been used, in which the many exhaust pipes mentioned above are dispensed with and also no spreading device (separators) are used. The sheet of thread forming a flat forehand extends perpendicular to the production direction, ie the preferred laying direction runs parallel to the production direction.

Die hierbei in jedem Fall höhere Geschwindigkeit der Filamente relativ zur Geschwindigkeit des Ab­legebandes führt zu schlangenförmigen Bewegungen bei der Ablage der Filamente. Dabei kommt es dann in bestimmten Bereichen zu Überlagerungen einzelner Filamente.The higher speed of the filaments in each case relative to the speed of the depositing belt leads to serpentine movements when the filaments are deposited. Individual filaments are then overlaid in certain areas.

Ein mit einer solchen Vorrichtung hergestelltes Vlies besitzt zwar eine bevorzugte Festigkeit in Längsrichtung, also in Produktionsrichtung, aller­dings sind die Festigkeitswerte in Querrichtung extrem schlecht.A fleece produced with such a device does have a preferred strength in the longitudinal direction, that is, in the production direction, but the strength values in the transverse direction are extremely poor.

Der Erfindung liegt die Aufgabe zugrunde, eine Vor­richtung zu schaffen, welche die Herstellung eines Vlieses mit einer hohen Gleichmäßigkeit erlaubt, und welche es gestattet, vorgegebene Festigkeits- und Dehnungswerte des Vlieses in gewünschten Rich­tungen zu realisieren.The invention has for its object to provide a device which allows the production of a nonwoven with a high degree of uniformity, and which allows to achieve predetermined strength and elongation values of the nonwoven in the desired directions.

Dieses Ziel erreicht die Erfindung bei der im Ober­begriff des Anspruchs 1 genannten Vorrichtung durch die Merkmale des kennzeichnenden Teils des Patent­anspruchs 1.The invention achieves this aim in the device mentioned in the preamble of claim 1 by the features of the characterizing part of patent claim 1.

Durch die Verstellbarkeit mindestens eines Spinn­balkens lassen sich die Ablagewinkel auf beliebige Werte einstellen, und ein besonderer Vorteil be­steht darin, daß eine solche Einstellung während des laufenden Betriebes der Vorrichtung möglich ist.Due to the adjustability of at least one spinning beam, the depositing angles can be set to any value, and a particular advantage is that such an adjustment is possible while the device is in operation.

Bevorzugt sind Ablagewinkel zwischen jeweils 0° bis 45° und entgegengesetzt, also von 0° bis -45°, so daß die Ablagerichtungen der Filamente des ersten Spinnbalkens und des zweiten Spinnbalkens untereinander einen Winkel von kleiner oder gleich 90° im Sinne einer variablen Kreuzablage bilden.Laying angles between 0 ° and 45 ° and opposite, preferably from 0 ° to -45 °, are preferred, so that the filing directions of the filaments of the first spinning beam and the second spinning beam form an angle of less than or equal to 90 ° with one another in the sense of a variable cross-filing .

Ein mit der erfindungsgemäßen Vorrichtung herge­stelltes Vlies kann sowohl isotrope Eigenschaften besitzen als auch bevorzugte Längsfestigkeiten. Es sind auch bevorzugte Querfestigkeiten ohne Be­einträchtigung der Vliesgleichmäßigkeit, je nach Wahl der Ablagewinkel, möglich.A fleece produced with the device according to the invention can have both isotropic properties and preferred longitudinal strengths. Preferred transverse strengths are also possible without impairing the uniformity of the fleece, depending on the choice of the depositing angle.

Durch die Erfindung soll ferner ein aus endlosfä­den hergestelltes mehrlagiges Vlies geschaffen werden, welches wählbare Festigkeitswerte und eine hohe Gleichmäßigkeit besitzt. Dieses Ziel er­ reicht die Erfindung gemäß den Merkmalen des Patent­anspruchs 7.The invention is also intended to create a multilayer nonwoven fabric made from continuous filaments, which has selectable strength values and a high degree of uniformity. That goal the invention ranges according to the features of claim 7.

Zweckmäßige Ausgestaltungen und vorteilhafte Wei­terbildungen der Erfindung sind in den Unteransprü­chen und der Beschreibung angegeben sowie der Zeich­nung zu entnehmen.Appropriate refinements and advantageous developments of the invention are specified in the subclaims and the description and can be seen in the drawing.

Nachfolgend wird die Erfindung anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 eine schematische Seitenan­sicht einer Vorrichtung mit zwei Spinnbalken,
  • Fig. 2 eine Draufsicht der Vorrich­tung gemäß Fig. 1,
  • Fig. 3 - 5 Darstellung zur Verdeut­lichung unterschiedlicher Ablagewinkel,
  • Fig. 6 eine mehr detaillierte Draufsicht eines Spinnbalkens, und
  • Fig. 7 eine perspektivische Darstel­lung eines Spinnbalkens gemäß Fig. 6.
The invention is explained in more detail below on the basis of the exemplary embodiment shown in the drawing. Show it:
  • 1 is a schematic side view of a device with two spinning beams,
  • FIG. 2 shows a top view of the device according to FIG. 1,
  • 3 - 5 illustration to illustrate different placement angles,
  • Fig. 6 is a more detailed Top view of a spinning beam, and
  • 7 is a perspective view of a spinning beam according to FIG. 6.

Fig. 1 zeigt eine als Ganzes mit der Bezugsziffer 10 bezeichnete Spinnstation, die zwei in Transportrichtung 30 (Produktionsrichtung) im Abstand voneinander ange­ordnete Spinnbalken 12 und 14 umfaßt. Über Schmelzlei­tungen 16 wird eine Schmelze zu den Spinnplatten 18 geführt.1 shows a spinning station, designated as a whole by the reference number 10, which comprises two spinning beams 12 and 14 arranged at a distance from one another in the transport direction 30 (production direction). A melt is fed to the spinning plates 18 via melt lines 16.

Jede Spinnplatte 18 dient der Verteilung der Schmelze über die Produktionsbreite, also der Breite eines Ab­lagebandes 28. Die Spinnplatten 18 sind im untersten Teil der Spinnbalken 12, 14 auswechselbar angebracht. In der Spinnplatte 18 befindet sich eine varibale An­zahl von als Spinndüse bezeichneten Löchern, durch die die flüssige Spinnschmelze aus der Spinnplatte 18 als Fadenschar 50 nach Art eines Vorhangs austritt. Dabei bewegt sich die Fadenschar 50 längs einer Blaswand 20, die eine Verstreckungszone 22 zum Verstrecken der Faden­schar bildet.Each spinning plate 18 is used to distribute the melt over the production width, that is to say the width of a deposit belt 28. The spinning plates 18 are interchangeably attached in the lowest part of the spinning beams 12, 14. In the spinning plate 18 there is a variable number of holes called spinnerets through which the liquid spinning melt emerges from the spinning plate 18 as a sheet 50 in the manner of a curtain. The thread sheet 50 moves along a blowing wall 20 which forms a stretching zone 22 for stretching the thread sheet.

Die Spinnstation 10 umfaßt ferner bei den beiden Spinnbalken 12, 14 jeweils eine Fadenabzugsvorrich­tung 24 und eine Ablegevorrichtung 26, durch welche die Fäden zur Erzielung einer hohen Gleichmäßigkeit gespreizt und auf dem in Transportrichtung 30 be­wegten Ablageband 28 zur Bildung eines Vlieses 52 abgelegt werden.The spinning station 10 further comprises, in each of the two spinning beams 12, 14, a thread take-off device 24 and a depositing device 26, by means of which the threads are spread to achieve high uniformity and are deposited on the depositing belt 28 moved in the transport direction 30 to form a fleece 52.

Das hier verwendete Vorhangverfahren arbeitet also mit einer Spreizvorrichtung - vergleichbar den be­kannten Separatoren - um eine bestimmte Ablegerich­tung der Fäden zu erzielen, nämlich eine 90°-Rich­tung, bezogen auf den Spinnbalken. Die Fäden werden also bis 90° zum Spinnbalken oszillierend hin- und herbewegt.The curtain method used here thus works with a spreading device - comparable to the known separators - in order to achieve a specific direction in which the threads are deposited, namely a 90 ° direction, based on the spinning beam. The threads are thus oscillated back and forth up to 90 ° to the spinning beam.

Wie in Fig. 1 zu erkennen ist, erfolgt die Ablage zunächst bei dem Spinnbalken 12, und auf die da­durch gebildete erste Schicht wird beim anderen Spinnbalken 14 eine zweite Schicht abgelegt, wo­durch ein mehrlagiges Vlies 52 entsteht.As can be seen in FIG. 1, the deposit takes place first with the spinning beam 12, and a second layer is deposited on the first layer formed thereby in the other spinning beam 14, whereby a multi-layer fleece 52 is formed.

In der Draufsicht in Fig. 2 ist zu erkennen, daß die Spinnbalken 12, 14 aus ihrer parallel zuein­ander verlaufenden gestrichelt gezeichneten Lage heraus in Richtung der Pfeile 56 und 58 um ihre Drehachsen 34 verschwenkbar sind, wobei die Längs­achsen 32 der Spinnbalken 12, 14 hier einen Winkel 54 bilden. Die einzelnen Lagen des Vlieses 52 be­sitzen also die durch die Spinnbalken 12 und 14 vor­gegebenen unterschiedlichen Ablagerichtungen bzw. Ablagewinkel. Diese unterschiedlichen Ablagerich­tungen sind in Fig. 3 - 5 dargestellt. Fig. 3 zeigt den Ablageverlauf 36 des einen Spinnbalkens 12, wäh­rend Fig. 4 den Ablageverlauf 38 des anderen Spinn­balkens 14 wiedergibt. Das daraus bei dem mehrlagi­gen Vlies 52 sich ergebende Ablagebild 40, welches durch Überlagerung der Ablageverläufe 36 und 38 ent­steht, ist in Fig. 5 dargestellt. Wie man erkennen kann, kreuzen sich die einzelnen Ablageverläufe, so daß sich für das mehrlagige Vlies insgesamt eine Kreuzablage mit variablen Winkeln ergibt. Wenn die sich kreuzenden Ablageverläufe 36 und 38 bei dem Ablagebild 40 an den Kreuzungsstellen einen Winkel von 90° bilden, erhält man ein isotropes Vlies 52 mit in allen Richtungen gleichen Festigkeitswerten.In the top view in Fig. 2 it can be seen that the spinning beams 12, 14 from their parallel, dashed position out in the direction of arrows 56 and 58 are pivotable about their axes of rotation 34, the longitudinal axes 32 of the spinning beams 12, 14 forming an angle 54 here. The individual layers of the fleece 52 thus have the different storage directions or storage angles, which are predetermined by the spinning beams 12 and 14. These different storage directions are shown in Figs. 3-5. FIG. 3 shows the course of the deposit 36 of the one spinning beam 12, while FIG. 4 shows the course of the deposit 38 of the other spinning beam 14. The resulting storage image 40, which results from the multilayer nonwoven 52, which is produced by superimposing the storage profiles 36 and 38, is shown in FIG. 5. As can be seen, the individual filing courses intersect, so that there is a cross filing with variable angles for the multilayer fleece. If the intersecting deposition courses 36 and 38 form an angle of 90 ° at the deposition image 40 at the intersection points, an isotropic fleece 52 is obtained with the same strength values in all directions.

Der nähere Teilaufbau einer Spinnstation 10 ergibt sich aus Fig. 6, welche den Spinnbalken 12 in einer Draufsicht zeigt. Der Spinnbalken 12 ist - ebenso wie der Spinnbalken 14 - auf einem Drehgestell 42 angeordnet und mittels der Führungsrollen 46 längs kreisförmiger Führungsschienen 44 gehalten und ge­führt. Die Führungsschienen 44 ermöglichen eine Dre­hung des Spinnbalkens 12 um die zentrale Drehachse 34, so daß sich unterschiedliche Drehwinkel 48 re­alisieren lassen. Durch entsprechende Ausrichtung der beiden Spinnbalken 12 und 14 ist es also möglich, unterschiedliche Ablageverläufe 36 und 38 (vgl. Fig. 3 und 4) zu realisieren. Damit besteht die Mög­lichkeit, dem hergestellten Vlies 52 die der späte­ren Anwendung entsprechenden Festigkeitswerte zu ge­ben.The closer partial structure of a spinning station 10 results from FIG. 6, which shows the spinning beam 12 in a plan view. The spinning beam 12 is - as well like the spinning beam 14 - arranged on a bogie 42 and held and guided along the circular guide rails 44 by means of the guide rollers 46. The guide rails 44 allow the spinning beam 12 to be rotated about the central axis of rotation 34, so that different angles of rotation 48 can be realized. By appropriately aligning the two spinning beams 12 and 14, it is thus possible to implement different storage profiles 36 and 38 (see FIGS. 3 and 4). This makes it possible to give the nonwoven 52 produced the strength values corresponding to the later application.

Die Führung und Halterung des Spinnbalkens 12 auf den Führungsschienen 44 ist auch in der perspekti­vischen Darstellung gemäß Fig. 7 verdeutlicht, und es ist hervorzuheben, daß die Einstellung unter­schiedlicher Drehwinkel 48 auch während des laufen­den Betriebes der gesamten Spinnstation 10 möglich ist. Dies stellt in der Praxis einen erheblichen Vorteil dar, weil darauf verzichtet werden kann, die Spinnstation für die Einstellung neuer ge­wünschter Drehwinkel 48 und damit für die Erzeugung neuer Ablagebilder 40 abzuschalten und stillzulegen. Insgesamt läßt sich die Spinnstation 10 demnach variabel betreiben, weil während des laufenden Be­triebes der Spinnstation eine Kreuzablage mit va­riablen Winkeln erzielt werden kann. Man kann des­halb während des laufenden Betriebes sofort ein gewünschtes neues Vlies-Produkt erzeugen.The guidance and mounting of the spinning beam 12 on the guide rails 44 is also illustrated in the perspective illustration according to FIG. 7, and it should be emphasized that the setting of different angles of rotation 48 is also possible during the operation of the entire spinning station 10. In practice, this represents a considerable advantage because it is not necessary to switch off and shut down the spinning station for setting new desired rotation angles 48 and thus for generating new storage images 40. Overall, the spinning station 10 can therefore be operated variably, because a cross deposit with variable angles can be achieved during the ongoing operation of the spinning station. A desired new nonwoven product can therefore be generated immediately during operation.

Claims (7)

1. Vorrichtung zur Herstellung eines Vlieses aus Endlosfäden, die unter Einfluß eines gasförmigen Treibmittels mit hoher Geschwindigkeit als Fadenschar (50) aus Spinndüsen von Spinnplatten (18) eines Spinn­balkens (12, 14) abgezogen und nach Durchlaufen ei­ner Fadenabzugsvorrichtung (24) mittels einer als Spreizvorrichtung ausgebildeten Ablegevorrichtung (26) auf einem sich in Produktionsrichtung (30) bewegenden Ablageband (28) zur Bildung des Vlieses (52) abgelegt werden, wobei in Produktionsrichtung (30) mindestens zwei Spinnbalken (12, 14) im Abstand voneinander vorge­gesehen sind, dadurch gekennzeichnet, daß mindestens ein Spinnbalken (12, 14) mitsamt der Ablege- und Spreiz­ vorrichtung (24) in einer parallel zum Ablageband ver­laufenden Ebene drehbar (56, 58) ausgebildet ist.1. Device for producing a nonwoven from continuous filaments, which is removed under the influence of a gaseous blowing agent at high speed as a sheet (50) from spinnerets of spinning plates (18) of a spinning beam (12, 14) and after passing through a thread pulling device (24) by means of a spreading device formed depositing device (26) are deposited on a moving in the production direction (30) depositing belt (28) for forming the web (52), wherein in the production direction (30) at least two spinning beams (12, 14) are pre-seen at a distance from one another, characterized characterized in that at least one spinning beam (12, 14) together with the depositing and spreading device (24) is rotatable (56, 58) in a plane running parallel to the storage belt. 2. Vorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß der oder die Spinnbalken (12, 14) um ei­nen Winkel von 45° drehbar ist bzw. sind.2. Device according to claim 1, characterized in that the spinning beam (s) (12, 14) can be rotated through an angle of 45 °. 3. Vorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß die Drehrichtung der Spinnbalken (12, 14) so gewählt ist, daß ihre Längsachsen (32) in den je­weiligen Endstellungen einen maximalen Winkel von 90° bilden.3. Apparatus according to claim 2, characterized in that the direction of rotation of the spinning beam (12, 14) is selected so that its longitudinal axes (32) form a maximum angle of 90 ° in the respective end positions. 4. Vorrichtung nach einem der vorhergehenden Ansprüche 1 - 3, dadurch gekennzeichnet, daß die Spinn­balken (12, 14) an ihren äußeren Enden auf kreisförmig verlaufenden Führungsschienen (44) gelagert sind.4. Device according to one of the preceding claims 1-3, characterized in that the spinning beams (12, 14) are mounted on their outer ends on circular guide rails (44). 5. Vorrichtung nach einem der vorhergehenden Ansprüche 1 - 4, dadurch gekennzeichnet, daß die Spinn­balken (12, 14) um eine in ihrer Mitte befindliche zen­trale Achse (34) drehbar sind.5. Device according to one of the preceding claims 1-4, characterized in that the spinning beams (12, 14) are rotatable about a central axis (34) located in their center. 6. Vorrichtung nach einem der vorhergehnden Ansprüche 1 - 5, dadurch gekennzeichnet, daß die Spinn­ balken (12, 14) in gewünschten Dreh- bzw. Winkelstel­lungen arretierbar sind.6. Device according to one of the preceding claims 1-5, characterized in that the spinning beams (12, 14) can be locked in the desired rotational or angular positions. 7. Aus Endlosfäden hergestelltes mehrlagiges Vlies, dadurch gekennzeichnet, daß die Ablagerichtungen der Filamente der einzelnen Lagen auf wählbare Werte einstellbar sind.7. Multi-layer fleece made from continuous filaments, characterized in that the filing directions of the filaments of the individual layers are adjustable to selectable values.
EP89104691A 1988-05-27 1989-03-16 Apparatus for producing a mat of continuous filaments and the manufacturing of multilayer mat with continuous filaments Expired - Lifetime EP0343331B1 (en)

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DE3818033 1988-05-27

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EP1838412B1 (en) * 2004-12-10 2013-05-22 Fresenius Hemocare Italia S.r.l. A method for the leucocyte depletion of blood or blood components
IT201800021523A1 (en) 2018-12-31 2020-07-01 Soft N W S P A HIGH PRODUCTIVITY AND FLEXIBILITY SPUN BONDING SYSTEM FOR THE PRODUCTION OF A FABRIC-NON-WOVEN VEIL

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IT201800021523A1 (en) 2018-12-31 2020-07-01 Soft N W S P A HIGH PRODUCTIVITY AND FLEXIBILITY SPUN BONDING SYSTEM FOR THE PRODUCTION OF A FABRIC-NON-WOVEN VEIL

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US4999080A (en) 1991-03-12
DE58908550D1 (en) 1994-12-01
ATE113326T1 (en) 1994-11-15
CA1325318C (en) 1993-12-21
ES2065346T3 (en) 1995-02-16
JPH0226977A (en) 1990-01-29
EP0343331B1 (en) 1994-10-26

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