EP1512777B1 - Apparatus for the production of multicomponent fibres, especially bicomponent fibres - Google Patents

Apparatus for the production of multicomponent fibres, especially bicomponent fibres Download PDF

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Publication number
EP1512777B1
EP1512777B1 EP03019114A EP03019114A EP1512777B1 EP 1512777 B1 EP1512777 B1 EP 1512777B1 EP 03019114 A EP03019114 A EP 03019114A EP 03019114 A EP03019114 A EP 03019114A EP 1512777 B1 EP1512777 B1 EP 1512777B1
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EP
European Patent Office
Prior art keywords
jet
nozzle block
melt
inflow channel
block
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
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EP03019114A
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German (de)
French (fr)
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EP1512777A1 (en
Inventor
Michael Baumeister
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to DE50312134T priority Critical patent/DE50312134D1/en
Priority to EP03019114A priority patent/EP1512777B1/en
Priority to US10/923,600 priority patent/US7160091B2/en
Priority to CN200410057591.2A priority patent/CN1607269B/en
Publication of EP1512777A1 publication Critical patent/EP1512777A1/en
Application granted granted Critical
Publication of EP1512777B1 publication Critical patent/EP1512777B1/en
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/28Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30Conjugate filaments; Spinnerette packs therefor
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00Treatment of filament-forming or like material
    • D01D1/06Feeding liquid to the spinning head
    • D01D1/09Control of pressure, temperature or feeding rate
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/08Melt spinning methods
    • D01D5/098Melt spinning methods with simultaneous stretching
    • D01D5/0985Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)

Definitions

  • the invention relates to a device for producing multicomponent fibers, in particular of bicomponent fibers, wherein a nozzle block assembly is provided from a central nozzle block and two outer nozzle blocks, wherein in the nozzle block aggregate at least two inflow channels are arranged for each melt flow of a component and wherein at the lower end of the nozzle block assembly a nozzle is provided with openings for dispensing the multicomponent fibers.
  • the device according to the invention should be suitable both for the production of fibers in the meltblown process with a meltblown nozzle and for the production of filaments for a spunbonded nonwoven.
  • the multicomponent fibers, in particular the bicomponent fibers may have a core-sheath structure or else a side-by-side arrangement.
  • the invention has the technical problem of providing a device of the type mentioned above, with which the problems described above can be avoided and in which the melt streams are each characterized by a homogeneous temperature distribution and by a very uniform flow.
  • the invention teaches a device of the type mentioned above, which is characterized in that at least one inflow passage in the region of the melt inlet of the nozzle block assembly runs exclusively through an outer nozzle block, that the remaining part of the length of this inflow channel between this outer nozzle block and the central nozzle block extends and that in the middle nozzle block between the inflow vertical bores for thermal separation of the two melt streams are provided.
  • the nozzle block assembly consists of a middle and two outer nozzle blocks, which are arranged on the left and right of the middle nozzle block and usually connect directly to the middle nozzle block.
  • the nozzle block aggregate or the middle nozzle block and the outer nozzle blocks expediently extend over the entire tool width or working width.
  • Working width or tool width here means the extent of the device transversely to the conveying direction of a fiber product produced, in particular to the conveying direction of a nonwoven web or a spunbonded web produced. It is within the scope of the invention that the width of an outer nozzle block in the conveying direction is 0.3 times to 4 times the width of the central nozzle block.
  • the device according to the invention can have one or more inflow channels for each component of the multicomponent fibers, in particular the bicomponent fibers, wherein the plurality of inflow channels are then distributed over the working width of the device.
  • a clothes hanger distributor for each component is provided at the nozzle-side end of the nozzle block assembly, which expediently extends over the entire tool width or working width. But it is also possible to use over the working width or tool width several hanger distributor for each component.
  • the nozzle has one or more rows of nozzle openings extending over the working width or tool width.
  • a preferred embodiment which is of very particular importance in the context of the invention, is characterized in that a first inflow channel in the region of the melt inlet runs exclusively through the first outer (left) nozzle block and that a second inflow channel in the region of the melt inlet exclusively through the second outer ( right) nozzle block runs.
  • at least one inflow channel extends over a length of 0.5 to 5 times the diameter of the inflow channel in front of the clothes hanger distributor in the parting plane of the nozzle block parts.
  • a preferred embodiment of the invention is characterized in that vertical bores are introduced for heat insulation in the middle nozzle block and that these bores are distributed over the entire working width. It is within the scope of the invention that the holes are filled with a heat-insulating medium, preferably with air. Conveniently, the vertical bores extend over at least part of the vertical height h of the central nozzle block.
  • the vertical height h of a nozzle block or of the nozzle block assembly relates to the orientation of the nozzle block assembly, in which the melt inlets are arranged at the top and the nozzle or nozzle orifices are arranged at the bottom.
  • heating means for setting desired heating temperatures are arranged in the middle nozzle block and / or in at least one of the two outer nozzle blocks.
  • such heaters are provided in each of the two outer nozzle blocks.
  • heating cartridges are arranged in corresponding bores in the nozzle block.
  • a plurality of heaters arranged in a nozzle block are distributed over the working width or tool width of the device. It is within the scope of the invention that at least one heating device is arranged next to an inflow channel in at least one outer nozzle block.
  • at least one such heating device is arranged next to the inflow channel of this nozzle block.
  • the at least one heating device is preferably arranged in each case on the outer side of the outer nozzle block, d. H. on the side facing away from the middle nozzle block side of the inflow channel.
  • the temperature of the melt can be adjusted specifically in an inflow channel. For example, a temperature of about 280 ° C can be maintained for a polyester melt in the respective inflow channel.
  • the nozzle is a meltblown nozzle. With the device fibers are then produced by the meltblown process.
  • the nozzle is a spinneret for producing filaments for a spunbonded web. Then you can work with the device according to the spunlaid method.
  • the invention is based on the finding that due to the inventive design of the device, a surprisingly homogeneous temperature distribution in the melt streams of the two components can be ensured. As a result, in each case a very uniform flow of the melt streams is achieved in the inflow channels. The skilled person must be particularly surprised that the known from the prior art disadvantages can be eliminated with such simple and inexpensive means. In principle, it is sufficient if in the context of the invention the melt streams or the inflow channels extend only in the melt inlet region exclusively through an outer nozzle block.
  • the figures show a device for producing bicomponent fibers.
  • the device comprises a nozzle block assembly 1, which in the embodiment of a central nozzle block 2 and two outer nozzle blocks 3, 4, namely a left nozzle block 3 and a right nozzle block 4th consists.
  • the nozzle blocks 2, 3, 4 directly adjoin one another and extend over the entire working width or tool width of the device.
  • Working width or tool width means the extent of the device perpendicular to the conveying direction F or in the Fig. 1 and 2 perpendicular to the paper plane.
  • Conveying direction refers to the promotion of a fiber product produced, for example, on the conveying direction of a nonwoven web.
  • nozzle block assembly 1 two inflow channels 5, 6 are arranged for a respective melt stream 7, 8 of a component.
  • a nozzle 9 is arranged with openings 10 for dispensing the bicomponent fibers.
  • a number of such openings 10 extend over the entire working width of the device. In the embodiment according to Fig. 2 several rows of openings 10 extend over the entire working width or tool width.
  • the first inflow channel 5 extends over part of its vertical length exclusively through the first outer or left nozzle block 3 and the second inflow channel 6 extends over part of its vertical length exclusively through the second outer or right nozzle block 4
  • vertical length means the extent of an inflow channel 5, 6 in the direction of the vertical height h of the nozzle block assembly 1.
  • both inflow channels 5, 6 extend in the region of the melt inlet 20 of the nozzle block assembly 1 exclusively through the respective outer nozzle block 3, 4.
  • the distance a of the portion of the inflow channel 5, 6 with the vertical length 1 to the central nozzle block 2 is at least 0.5 to 5 times the diameter of the inflow channel 5, 6. It is within the invention that the width b2 of an outer nozzle block 3, 4 is 0.3 to 4 times the mean nozzle block 2.
  • a heating device 12 is located with which the temperature required for the first melt stream 7 can be set simply and easily.
  • the heaters 12 are preferably and realized in the embodiment as holes 13, in which heating cartridges not shown are used.
  • Such a heating device 12 or bore 13 can also be seen in the right nozzle block 4 to the right of the second inflow channel 6.
  • the device according to Fig. 1 is suitable for carrying out a meltblown process. It can be seen below the nozzle block assembly 1, a removable cassette 14 with the meltblown nozzle 9. In addition, the typical for the meltblown process supply channels 15 for a fluid medium, preferably recognizable for hot air. At the bottom of the removable cassette 14 air lips 16 are provided.
  • Fig. 2 a device for producing a spunbonded nonwoven.
  • a spin pack 17 can be seen, which consists of a perforated plate 18, distribution plates 19 and the spinneret 9 with openings 10 and spinneret openings.
  • the device for the production of multi-component films it is also possible to use the device for the production of multi-component films

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Erzeugung von Mehrkomponentenfasern, insbesondere von Bikomponentenfasern, wobei ein Düsenblockaggregat aus einem mittleren Düsenblock und zwei äußeren Düsenblöcken vorgesehen ist, wobei in dem Düsenblockaggregat zumindest zwei Zuströmkanäle für jeweils einen Schmelzestrom einer Komponente angeordnet sind und wobei am unteren Ende des Düsenblockaggregates eine Düse mit Öffnungen zur Ausgabe der Mehrkomponentenfasern vorgesehen ist. - Die erfindungsgemäße Vorrichtung soll sich sowohl zur Herstellung von Fasern im Meltblown-Verfahren mit einer Meltblown Düse eignen als auch zur Herstellung von Filamenten für ein Spinnvlies. Die Mehrkomponentenfasern, insbesondere die Bikomponentenfasern können eine Kern Mantel Struktur oder aber auch eine Seite an Seite Anordnung aufweisen.The invention relates to a device for producing multicomponent fibers, in particular of bicomponent fibers, wherein a nozzle block assembly is provided from a central nozzle block and two outer nozzle blocks, wherein in the nozzle block aggregate at least two inflow channels are arranged for each melt flow of a component and wherein at the lower end of the nozzle block assembly a nozzle is provided with openings for dispensing the multicomponent fibers. The device according to the invention should be suitable both for the production of fibers in the meltblown process with a meltblown nozzle and for the production of filaments for a spunbonded nonwoven. The multicomponent fibers, in particular the bicomponent fibers, may have a core-sheath structure or else a side-by-side arrangement.

Vorrichtungen zur Erzeugung von Mehrkomponentenfasern sind aus dem Stand der Technik bekannt ( US 6 478 563 B1 , US 6 491 507 B1 ). Bei diesen bekannten Vorrichtungen verlaufen zwei Zuströmkanäle, in denen jeweils ein Schmelzestrom einer Komponente für Bikomponentenfasern geführt wird, vollständig in dem mittleren Düsenblock bzw. entlang des Randes des mittleren Düsenblockes. Bei diesen bekannten Vorrichtungen stellt die thermische Trennung der beiden Schmelzeströme ein Problem dar. Mit anderen Worten kommt es in der Regel zu einer gegenseitigen Beeinflussung der beiden heißen Schmelzeströme. Das führt zu einer ungleichmäßigen bzw. inhomogenen Temperaturverteilung und daraus resultiert wiederum eine nachteilhafte Beeinträchtigung der Strömungsgleichmäßigkeit der Schmelzen. Diese Probleme sind besonders ausgeprägt wenn die Schmelzpunkte der beiden Komponenten höhere Differenzen, beispielsweise oberhalb von 50 °C aufweisen. Das trifft beispielsweise zu, wenn es sich bei der einen Komponente um ein Polyolefin, z. B. Polypropylen und bei der zweiten Komponente um einen Polyester, z. B. Polyethylenterephthalat (PET) handelt.Devices for producing multicomponent fibers are known from the prior art ( US Pat. No. 6,478,563 B1 . US Pat. No. 6,491,507 B1 ). In these known devices, two inflow channels, in each of which a melt stream of a component for bicomponent fibers is guided, run completely in the middle nozzle block or along the edge of the middle nozzle block. In these known devices, the thermal separation of the two melt streams is a problem. In other words, it usually comes to a mutual influence of the two hot melt streams. This leads to an uneven or inhomogeneous temperature distribution and this in turn results in a disadvantageous impairment of the flow uniformity of the melts. These problems are particularly pronounced when the melting points of the two components have higher differences, for example above 50 ° C exhibit. This is true, for example, if one component is a polyolefin, e.g. As polypropylene and the second component to a polyester, z. As polyethylene terephthalate (PET) is.

Demgegenüber liegt der Erfindung das technische Problem zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, mit der die vorstehend beschriebenen Probleme vermieden werden können und bei der sich die Schmelzeströme jeweils durch eine homogene Temperaturverteilung sowie durch eine sehr gleichmäßige Strömung auszeichnen.In contrast, the invention has the technical problem of providing a device of the type mentioned above, with which the problems described above can be avoided and in which the melt streams are each characterized by a homogeneous temperature distribution and by a very uniform flow.

Zur Lösung dieses technischen Problems lehrt die Erfindung eine Vorrichtung der eingangs genannten Art, welche dadurch gekennzeichnet ist, dass zumindest ein Zuströmkanal im Bereich des Schmelzeeintritts des Düsenblockaggregates ausschließlich durch einen äußeren Düsenblock verläuft, dass der restliche Teil der Länge dieses Zuströmkanals zwischen diesem äußeren Düsenblock und dem mittleren Düsenblock verläuft und dass in dem mittleren Düsenblock zwischen den Zuströmkanälen vertikale Bohrungen zur thermischen Trennung der beiden Schmelzeströme vorgesehen sind. - Das Düsenblockaggregat besteht aus einem mittleren und zwei äußeren Düsenblöcken, die links und rechts von dem mittleren Düsenblock ange-ordnet sind und in der Regel unmittelbar an den mittleren Düsenblock anschließen. Das Düsenblockaggregat bzw. der mittlere Düsenblock und die äußeren Düsenblöcke erstrecken sich zweckmäßigerweise über die gesamte Werkzeugbreite bzw. Arbeitsbreite. Arbeitsbreite bzw. Werkzeugbreite meint hier die Erstreckung der Vorrichtung quer zur Förderrichtung eines erzeugten Faserproduktes, insbesondere zur Förderrichtung einer erzeugten Vliesbahn bzw. eines Spinnvlieses. Es liegt im Rahmen der Erfindung, dass die Breite eines äußeren Düsenblockes in Förderrichtung das 0,3-fache bis 4-fache der Breite des mittleren Düsenblockes beträgt.To solve this technical problem, the invention teaches a device of the type mentioned above, which is characterized in that at least one inflow passage in the region of the melt inlet of the nozzle block assembly runs exclusively through an outer nozzle block, that the remaining part of the length of this inflow channel between this outer nozzle block and the central nozzle block extends and that in the middle nozzle block between the inflow vertical bores for thermal separation of the two melt streams are provided. - The nozzle block assembly consists of a middle and two outer nozzle blocks, which are arranged on the left and right of the middle nozzle block and usually connect directly to the middle nozzle block. The nozzle block aggregate or the middle nozzle block and the outer nozzle blocks expediently extend over the entire tool width or working width. Working width or tool width here means the extent of the device transversely to the conveying direction of a fiber product produced, in particular to the conveying direction of a nonwoven web or a spunbonded web produced. It is within the scope of the invention that the width of an outer nozzle block in the conveying direction is 0.3 times to 4 times the width of the central nozzle block.

Die erfindungsgemäße Vorrichtung kann für jede Komponente der Mehrkomponentenfasern, insbesondere der Bikomponentenfasern einen oder auch mehrere Zuströmkanäle aufweisen, wobei die mehreren Zuströmkanäle dann über die Arbeitsbreite der Vorrichtung verteilt sind. Vorzugsweise ist am düsenseitigen Ende des Düsenblockaggregates jeweils ein Kleiderbügelverteiler für jede Komponente vorgesehen, der sich zweckmäßigerweise über die gesamte Werkzeugbreite bzw. Arbeitsbreite erstreckt. Es ist aber auch möglich, über die Arbeitsbreite bzw. Werkzeugbreite mehrere Kleiderbügelverteiler für jede Komponente einzusetzen. Die Düse weist eine oder mehrere Reihen von Düsenöffnungen auf, die sich über die Arbeitsbreite bzw. Werkzeugbreite erstreckt bzw. erstrecken.The device according to the invention can have one or more inflow channels for each component of the multicomponent fibers, in particular the bicomponent fibers, wherein the plurality of inflow channels are then distributed over the working width of the device. Preferably, a clothes hanger distributor for each component is provided at the nozzle-side end of the nozzle block assembly, which expediently extends over the entire tool width or working width. But it is also possible to use over the working width or tool width several hanger distributor for each component. The nozzle has one or more rows of nozzle openings extending over the working width or tool width.

Eine bevorzugte Ausführungsform der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, ist dadurch gekennzeichnet, dass ein erster Zuströmkanal im Bereich des Schmelzeeintritts ausschließlich durch den ersten äußeren (linken) Düsenblock verläuft und dass ein zweiter Zuströmkanal im Bereich des Schmelzeeintritts ausschließlich durch den zweiten äußeren (rechten) Düsenblock verläuft. Vorzugsweise verläuft zumindest ein Zuströmkanal über eine Länge von 0,5- bis 5-fachen des Durchmessers des Zuströmkanals vor dem Kleiderbügelverteiler in der Trennebene der Düsenblockteile.A preferred embodiment, which is of very particular importance in the context of the invention, is characterized in that a first inflow channel in the region of the melt inlet runs exclusively through the first outer (left) nozzle block and that a second inflow channel in the region of the melt inlet exclusively through the second outer ( right) nozzle block runs. Preferably, at least one inflow channel extends over a length of 0.5 to 5 times the diameter of the inflow channel in front of the clothes hanger distributor in the parting plane of the nozzle block parts.

Eine bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass in dem mittleren Düsenblock vertikale Bohrungen zur Wärmeisolierung eingebracht sind und dass diese Bohrungen über die gesamte Arbeitsbreite verteilt sind. Es liegt im Rahmen der Erfindung, dass die Bohrungen mit einem wärmeisolierenden Medium, vorzugsweise mit Luft gefüllt sind. Zweckmäßigerweise erstrecken sich die vertikalen Bohrungen über zumindest einen Teil der vertikalen Höhe h des mittleren Düsenblocks. Vertikale Höhe h eines Düsenblocks bzw. des Düsenblockaggregates bezieht sich im Übrigen auf die Orientierung des Düsenblockaggregates, in der die Schmelzeeintritte oben angeordnet sind und die Düse bzw. die Düsenöffnungen unten angeordnet sind.A preferred embodiment of the invention is characterized in that vertical bores are introduced for heat insulation in the middle nozzle block and that these bores are distributed over the entire working width. It is within the scope of the invention that the holes are filled with a heat-insulating medium, preferably with air. Conveniently, the vertical bores extend over at least part of the vertical height h of the central nozzle block. Incidentally, the vertical height h of a nozzle block or of the nozzle block assembly relates to the orientation of the nozzle block assembly, in which the melt inlets are arranged at the top and the nozzle or nozzle orifices are arranged at the bottom.

Gemäß einer bevorzugten Ausführungsform der Erfindung sind in dem mittleren Düsenblock und/oder in zumindest einem der beiden äußeren Düsenblöcke Heizeinrichtungen zur Einstellung gewünschter Heiztemperaturen angeordnet. Vorzugsweise sind in jedem der beiden äußeren Düsenblöcke solche Heizeinrichtungen vorgesehen. Bei den Heizeinrichtungen handelt es sich nach einer bevorzugten Ausführungsform um Heizpatronen, die in entsprechenden Bohrungen in dem Düsenblock angeordnet sind. Zweckmäßigerweise ist eine Mehrzahl von in einem Düsenblock angeordneten Heizeinrichtungen über die Arbeitsbreite bzw. Werkzeugbreite der Vorrichtung verteilt. Es liegt im Rahmen der Erfindung, dass in zumindest einem äußeren Düsenblock zumindest eine Heizeinrichtung neben einem Zuströmkanal angeordnet ist. Vorzugsweise ist in jedem äußeren Düsenblock zumindest eine solche Heizeinrichtung neben dem Zuströmkanal dieses Düsenblockes angeordnet. Dabei ist die zumindest eine Heizeinrichtung bevorzugt jeweils an der Außenseite des äußeren Düsenblocks angeordnet, d. h. an der dem mittleren Düsenblock abgewandten Seite des Zuströmkanals. Mit Hilfe solcher Heizeinrichtungen kann die Temperatur der Schmelze in einem Zuströmkanal gezielt eingestellt werden. So kann beispielsweise eine Temperatur von etwa 280°C für eine Polyesterschmelze in dem betreffenden Zuströmkanal aufrechterhalten werden.According to a preferred embodiment of the invention, heating means for setting desired heating temperatures are arranged in the middle nozzle block and / or in at least one of the two outer nozzle blocks. Preferably, such heaters are provided in each of the two outer nozzle blocks. In the case of the heating devices, according to a preferred embodiment, heating cartridges are arranged in corresponding bores in the nozzle block. Conveniently, a plurality of heaters arranged in a nozzle block are distributed over the working width or tool width of the device. It is within the scope of the invention that at least one heating device is arranged next to an inflow channel in at least one outer nozzle block. Preferably, in each outer nozzle block, at least one such heating device is arranged next to the inflow channel of this nozzle block. In this case, the at least one heating device is preferably arranged in each case on the outer side of the outer nozzle block, d. H. on the side facing away from the middle nozzle block side of the inflow channel. With the help of such heaters, the temperature of the melt can be adjusted specifically in an inflow channel. For example, a temperature of about 280 ° C can be maintained for a polyester melt in the respective inflow channel.

Nach einer Ausführungsform der Erfindung handelt es sich bei der Düse um eine Meltblown-Düse. Mit der Vorrichtung sind dann Fasern nach dem Meltblown Verfahren herstellbar.According to one embodiment of the invention, the nozzle is a meltblown nozzle. With the device fibers are then produced by the meltblown process.

Nach einer anderen Ausführungsform handelt es sich bei der Düse um eine Spinndüse zur Erzeugung von Filamenten für ein Spinnvlies. Dann kann mit der Vorrichtung nach dem Spunlaid Verfahren gearbeitet werden.In another embodiment, the nozzle is a spinneret for producing filaments for a spunbonded web. Then you can work with the device according to the spunlaid method.

Der Erfindung liegt die Erkenntnis zugrunde, dass aufgrund der erfindungsgemäßen Ausgestaltung der Vorrichtung eine überraschend homogene Temperaturverteilung in den Schmelzeströmen der beiden Komponenten sichergestellt werden kann. Dadurch wird in den Zuströmkanälen jeweils eine sehr gleichmäßige Strömung der Schmelzeströme erzielt. Den Fachmann muss es insbesondere überraschen, dass die aus dem Stand der Technik bekannten Nachteile mit so einfachen und wenig aufwendigen Mitteln beseitigt werden können. Grundsätzlich reicht es aus, wenn im Rahmen der Erfindung die Schmelzeströme bzw. die Zuströmkanäle lediglich im Schmelzeeintrittsbereich ausschließlich durch einen äußeren Düsenblock verlaufen.The invention is based on the finding that due to the inventive design of the device, a surprisingly homogeneous temperature distribution in the melt streams of the two components can be ensured. As a result, in each case a very uniform flow of the melt streams is achieved in the inflow channels. The skilled person must be particularly surprised that the known from the prior art disadvantages can be eliminated with such simple and inexpensive means. In principle, it is sufficient if in the context of the invention the melt streams or the inflow channels extend only in the melt inlet region exclusively through an outer nozzle block.

Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:

  • Fig. 1 einen Schnitt durch eine erfindungsgemäße Vorrichtung mit einer Meltblown Düse und
  • Fig. 2 den Gegenstand gemäß Fig. 1 mit einer Spinndüse zur Erzeugung eines Spinnvlieses.
The invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. In a schematic representation:
  • Fig. 1 a section through a device according to the invention with a meltblown nozzle and
  • Fig. 2 the object according to Fig. 1 with a spinneret for producing a spunbonded web.

Die Figuren zeigen eine Vorrichtung zur Erzeugung von Bikomponentenfasern. Die Vorrichtung weist ein Düsenblockaggregat 1 auf, das im Ausführungsbeispiel aus einem mittleren Düsenblock 2 und zwei äußeren Düsenblöcken 3, 4, nämlich einem linken Düsenblock 3 und einem rechten Düsenblock 4 besteht. Die Düsenblöcke 2, 3, 4 schließen unmittelbar aneinander an und erstrecken sich über die gesamte Arbeitsbreite bzw. Werkzeugbreite der Vorrichtung. Arbeitsbreite bzw. Werkzeugbreite meint dabei die Erstreckung der Vorrichtung senkrecht zur Förderrichtung F bzw. in den Fig. 1 und 2 senkrecht zur Papierebene. Förderrichtung bezieht sich auf die Förderung eines erzeugten Faserproduktes, beispielsweise auf die Förderrichtung einer Vliesbahn.The figures show a device for producing bicomponent fibers. The device comprises a nozzle block assembly 1, which in the embodiment of a central nozzle block 2 and two outer nozzle blocks 3, 4, namely a left nozzle block 3 and a right nozzle block 4th consists. The nozzle blocks 2, 3, 4 directly adjoin one another and extend over the entire working width or tool width of the device. Working width or tool width means the extent of the device perpendicular to the conveying direction F or in the Fig. 1 and 2 perpendicular to the paper plane. Conveying direction refers to the promotion of a fiber product produced, for example, on the conveying direction of a nonwoven web.

In dem Düsenblockaggregat 1 sind zwei Zuströmkanäle 5, 6 für jeweils einen Schmelzestrom 7, 8 einer Komponente angeordnet. Am unteren Ende des Düsenblockaggregates 1 ist eine Düse 9 mit Öffnungen 10 zur Ausgabe der Bikomponentenfasern angeordnet. Eine Reihe solcher Öffnungen 10 erstreckt sich über die gesamte Arbeitsbreite der Vorrichtung. Im Ausführungsbeispiel nach Fig. 2 erstrecken sich mehrere Reihen von Öffnungen 10 über die gesamte Arbeitsbreite bzw. Werkzeugbreite.In the nozzle block assembly 1, two inflow channels 5, 6 are arranged for a respective melt stream 7, 8 of a component. At the lower end of the nozzle block assembly 1, a nozzle 9 is arranged with openings 10 for dispensing the bicomponent fibers. A number of such openings 10 extend over the entire working width of the device. In the embodiment according to Fig. 2 several rows of openings 10 extend over the entire working width or tool width.

Nach sehr bevorzugter Ausführungsform und im Ausführungsbeispiel verläuft der erste Zuströmkanal 5 über einen Teil seiner vertikalen Länge ausschließlich durch den ersten äußeren bzw. linken Düsenblock 3 und verläuft der zweite Zuströmkanal 6 über einen Teil seiner vertikalen Länge ausschließlich durch den zweiten äußeren bzw. rechten Düsenblock 4. Vertikale Länge meint dabei die Erstreckung eines Zuströmkanals 5, 6 in Richtung der vertikalen Höhe h des Düsenblockaggregates 1. Nach sehr bevorzugter Ausführungsform und im Ausführungsbeispiel verlaufen dabei beide Zuströmkanäle 5, 6 im Bereich des Schmelzeeintritts 20 des Düsenblockaggregates 1 ausschließlich durch den jeweiligen äußeren Düsenblock 3, 4. Vorzugsweise und im Ausführungsbeispiel beträgt der Abstand a des Teils des Zuströmkanals 5, 6 mit der vertikalen Länge 1 zum mittleren Düsenblock 2 zumindest 0,5- bis 5-fache des Durchmessers des Zuströmkanals 5, 6. Es liegt im Rahmen der Erfindung, dass die Breite b2 eines äußeren Düsenblocks 3, 4 das 0,3- bis 4-fache des mittleren Düsenblockes 2 beträgt.According to a very preferred embodiment and in the exemplary embodiment, the first inflow channel 5 extends over part of its vertical length exclusively through the first outer or left nozzle block 3 and the second inflow channel 6 extends over part of its vertical length exclusively through the second outer or right nozzle block 4 In this case, vertical length means the extent of an inflow channel 5, 6 in the direction of the vertical height h of the nozzle block assembly 1. According to a very preferred embodiment and in the embodiment, both inflow channels 5, 6 extend in the region of the melt inlet 20 of the nozzle block assembly 1 exclusively through the respective outer nozzle block 3, 4. Preferably, and in the embodiment, the distance a of the portion of the inflow channel 5, 6 with the vertical length 1 to the central nozzle block 2 is at least 0.5 to 5 times the diameter of the inflow channel 5, 6. It is within the invention that the width b2 of an outer nozzle block 3, 4 is 0.3 to 4 times the mean nozzle block 2.

In den Fig. 1 und 2 ist angedeutet worden, dass sich nach bevorzugter Ausführungsform in dem mittleren Düsenblock 2 zwischen den Zuströmkanälen 5, 6 vertikale Bohrungen 11 zur Wärmeisolierung bzw. zur thermischen Trennung der beiden Schmelzeströme 7, 8 befinden. Zweckmäßigerweise sind diese vertikalen Bohrungen 11 lediglich mit Luft gefüllt. Die vertikalen Bohrungen 11 sind vorzugsweise über die gesamte Arbeitsbreite der Vorrichtung verteilt.In the Fig. 1 and 2 It has been indicated that according to a preferred embodiment in the middle nozzle block 2 between the inflow channels 5, 6 vertical bores 11 for thermal insulation or for the thermal separation of the two melt streams 7, 8 are. Conveniently, these vertical holes 11 are only filled with air. The vertical holes 11 are preferably distributed over the entire working width of the device.

In den Fig. 1 und 2 ist weiterhin angedeutet worden, dass sich in dem linken Düsenblock 3 links von dem ersten Zuströmkanal 5 eine Heizeinrichtung 12 befindet, mit der sich die für den ersten Schmelzestrom 7 erforderliche Temperatur einfach und problemlos einstellen lässt. Die Heizeinrichtungen 12 sind vorzugsweise und im Ausführungsbeispiel als Bohrungen 13 verwirklicht, in denen nicht näher dargestellte Heizpatronen eingesetzt sind. Eine solche Heizeinrichtung 12 bzw. Bohrung 13 erkennt man auch in dem rechten Düsenblock 4 rechts neben dem zweiten Zuströmkanal 6. Mit Hilfe der vertikalen Bohrungen 11 einerseits und mit den Heizeinrichtungen 12 andererseits kann eine sehr effektive thermische Trennung der beiden Schmelzeströme 7, 8 erreicht werden und somit kann eine besonders homogene Temperaturverteilung in den Schmelzeströmen 7, 8 sichergestellt werden.In the Fig. 1 and 2 Furthermore, it has been indicated that in the left nozzle block 3, to the left of the first inflow channel 5, a heating device 12 is located with which the temperature required for the first melt stream 7 can be set simply and easily. The heaters 12 are preferably and realized in the embodiment as holes 13, in which heating cartridges not shown are used. Such a heating device 12 or bore 13 can also be seen in the right nozzle block 4 to the right of the second inflow channel 6. With the help of the vertical holes 11 on the one hand and with the heaters 12 on the other hand, a very effective thermal separation of the two melt streams 7, 8 can be achieved and thus a particularly homogeneous temperature distribution in the melt streams 7, 8 can be ensured.

Die Vorrichtung gemäß Fig. 1 ist im Übrigen zur Durchführung eines Meltblown-Verfahrens geeignet. Man erkennt unterhalb des Düsenblockaggregates 1 eine Wechselkassette 14 mit der Meltblown-Düse 9. Außerdem sind die für das Meltblown-Verfahren typischen Zuführungskanäle 15 für ein fluides Medium, vorzugsweise für Heißluft erkennbar. Im unteren Bereich der Wechselkassette 14 sind Luftlippen 16 vorgesehen.The device according to Fig. 1 Incidentally, it is suitable for carrying out a meltblown process. It can be seen below the nozzle block assembly 1, a removable cassette 14 with the meltblown nozzle 9. In addition, the typical for the meltblown process supply channels 15 for a fluid medium, preferably recognizable for hot air. At the bottom of the removable cassette 14 air lips 16 are provided.

Dagegen zeigt die Fig. 2 eine Vorrichtung zur Herstellung eines Spinnvlieses. Unterhalb des Düsenblockaggregates 1 ist ein Spinnpaket 17 erkennbar, das aus einer Lochplatte 18, Verteilblechen 19 und der Spinndüse 9 mit Öffnungen 10 bzw. Spinndüsenöffnungen besteht. Grundsätzlich besteht auch die Möglichkeit, die Vorrichtung für die Herstellung von Mehrkomponentenfolien zu verwendenIn contrast, the shows Fig. 2 a device for producing a spunbonded nonwoven. Below the nozzle block assembly 1, a spin pack 17 can be seen, which consists of a perforated plate 18, distribution plates 19 and the spinneret 9 with openings 10 and spinneret openings. In principle, it is also possible to use the device for the production of multi-component films

Claims (7)

  1. An apparatus for generating multi-component fibres, in particular bi-component fibres,
    wherein a jet block unit (1) comprising a middle jet block (2) and two external jet blocks (3, 4) is provided,
    wherein in the jet block unit (1) at least two inflow channels (5, 6) are disposed for a respective melt flow (7, 8) of one component,
    wherein at the bottom end of the jet block unit (1) a jet (9) with openings (10) for the delivery of said multi-component fibres is provided,
    characterised in that at least an inflow channel (5, 6) runs in the area of the melt inlet (20) of the jet block unit (1) exclusively through an external jet block (3, 4), such that the rest part of the length of this inflow channel (5, 6) runs between this external jet block (3, 4) and the middle jet block (2)
    and that vertical holes (11) are provided for thermal separation of the two melt flows (7, 8) in the middle of the jet block (2) between the inflow channels (5, 6).
  2. The apparatus according to Claim 1 characterised in that a first inflow channel (5) in the area of the melt inlet (20) runs exclusively through the first external jet block (3) and that a second inflow channel (6) runs in the area of the melt inlet (20) exclusively through the second external jet block (4).
  3. The apparatus according to one of Claim 1 or 2 characterised in that the vertical holes (11) are distributed over the entire working width.
  4. The apparatus according to one of Claims 1 to 3, characterised in that heating devices (12) for setting the desired heating temperatures are disposed in the middle jet block (2) and/or in at least one of the two external jet blocks (3, 4).
  5. The apparatus according to one of Claims 1 to 4, characterised in that at least one heating device (12) is disposed near an inflow channel (5, 6) in at least one external jet block (3, 4).
  6. The apparatus according to one of Claims 1 to 5 characterised in that the jet (9) involves a melt-blown jet (9).
  7. The apparatus according to one of Claims 1 to 5 characterised in that the jet (9) involves a spinning jet (9) for generating filaments for a nonwoven fabric.
EP03019114A 2003-08-23 2003-08-23 Apparatus for the production of multicomponent fibres, especially bicomponent fibres Expired - Lifetime EP1512777B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50312134T DE50312134D1 (en) 2003-08-23 2003-08-23 Device for producing multicomponent fibers, in particular bicomponent fibers
EP03019114A EP1512777B1 (en) 2003-08-23 2003-08-23 Apparatus for the production of multicomponent fibres, especially bicomponent fibres
US10/923,600 US7160091B2 (en) 2003-08-23 2004-08-20 Device for the production of multicomponent fibers or filaments, in particular bicomponent fibers or filaments
CN200410057591.2A CN1607269B (en) 2003-08-23 2004-08-23 Apparatus for the production of multicomponent fibres

Applications Claiming Priority (1)

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EP03019114A EP1512777B1 (en) 2003-08-23 2003-08-23 Apparatus for the production of multicomponent fibres, especially bicomponent fibres

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EP1512777A1 EP1512777A1 (en) 2005-03-09
EP1512777B1 true EP1512777B1 (en) 2009-11-18

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US20050233018A1 (en) 2005-10-20
DE50312134D1 (en) 2009-12-31
CN1607269B (en) 2013-10-16
CN1607269A (en) 2005-04-20
US7160091B2 (en) 2007-01-09
EP1512777A1 (en) 2005-03-09

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