EP2047020A1 - Device for the production of perforated nonwoven fabrics - Google Patents

Device for the production of perforated nonwoven fabrics

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Publication number
EP2047020A1
EP2047020A1 EP07725939A EP07725939A EP2047020A1 EP 2047020 A1 EP2047020 A1 EP 2047020A1 EP 07725939 A EP07725939 A EP 07725939A EP 07725939 A EP07725939 A EP 07725939A EP 2047020 A1 EP2047020 A1 EP 2047020A1
Authority
EP
European Patent Office
Prior art keywords
elevations
drainage openings
side walls
approximately
support device
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.)
Granted
Application number
EP07725939A
Other languages
German (de)
French (fr)
Other versions
EP2047020B1 (en
Inventor
Ullrich MÜNSTERMANN
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
Original Assignee
Fleissner GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Fleissner GmbH filed Critical Fleissner GmbH
Priority to PL07725939T priority Critical patent/PL2047020T3/en
Publication of EP2047020A1 publication Critical patent/EP2047020A1/en
Application granted granted Critical
Publication of EP2047020B1 publication Critical patent/EP2047020B1/en
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Classifications

    • 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
    • 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
    • D04H3/10—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 yarns or filaments made mechanically
    • D04H3/11—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 yarns or filaments made mechanically by fluid jet

Definitions

  • the invention relates to a device for the production of perforated nonwovens by means of a hydrodynamic needling device and a carrier device, on whose surface a plurality of elevations are arranged at a distance from each other, in whose area drainage openings for the removal of escaping from the needling device liquid are provided, wherein the elevations with respect to the surface of the support device at least partially inclined and / or rounded contact with the nonwoven fabric contact surfaces.
  • a process for the production of openwork nonwovens is already known (EP 0 215 684 B1 Uni Charm), which is equipped with a device for the production of openwork nonwovens by means of a hydrodynamic needling device and a carrier device or drum, on whose surface a plurality of elevations Disposed at a distance from one another, in the region of which drainage openings are provided for the removal of liquid emerging from the netting device, the elevations with respect to the surface of the carrier device having at least partially inclined and / or rounded surfaces which can be brought into contact with the nonwoven fabric.
  • the distances between the elevations may have a uniform distance from each other in the circumferential direction and also in the transverse direction of the carrier device or the drum.
  • nonwovens are perforated, whereby more fibers occur in the direction of conveyance of the nonwoven fabric moving further with the aid of the drum than in the transverse direction due to the alignment and shaping of the elevations.
  • the uneven distribution of the fibers or the washing away of the fibers in the fleece with respect to the direction of movement of the fleece to the right and left is done with the help of the unfavorable incident on the fleece water jet while continuing to move the fleece using the drum.
  • the invention is based on the object with the apparatus for producing perforated nonwovens to ensure a uniform orientation and / or distribution of the fiber materials or filaments in the nonwoven fabric.
  • the measures provided for on the surface of the support device elevations at least two in the conveying direction of the support device in approximately parallel, at least approximately upright side walls, which are bounded by at least one surface, with the surface of the Carrier device includes an angle a, which is smaller than 0 °.
  • the surface which is delimited by the side walls encloses an angle ⁇ with the carrier device which is between 0 ° and 80 °, in particular between 20 ° and 45 °.
  • the filaments in the nonwoven fabric are aligned optimally in the longitudinal direction and in part also in the transverse direction of the nonwoven fabric. As a result, a uniform distribution of the fiber is ensured over the entire nonwoven surface.
  • the elevations provided on the surface of the support device have at least two transverse to the conveying direction of the support device in approximately parallel, at least approximately upright side walls, which are bounded by at least the one surface with the surface the support device includes an angle ⁇ greater than 0 °. Furthermore, it is advantageous for the elevations provided on the surface of the carrier device to have at least two, at least approximately transversely to the conveying direction of the carrier device, approximately parallel, at least approximately upright side walls which are delimited by at least the one flat surface which is in contact with the surface of the carrier device Carrier device an angle /? which is between 80 ° and 90 °.
  • the outwardly directed surfaces of the two adjacent elevations are approximately V-shaped or approximately roof-shaped or enclose an angle ⁇ which is smaller than 180 ° or the surface of each elevation roof-shaped is.
  • the outwardly directed surface of the elevation to be inclined in and / or opposite to the conveying direction of the fleece.
  • the cross-sectional area of the elevation is polygonal, rectangular, circular or oval-shaped.
  • the drainage openings provided in the region of the side walls are greater than 0.3 mm, in particular between 0.4 mm and 3 mm.
  • the drainage openings provided in the region of the side walls are in some cases greater than 0.1 mm and another part of the drainage openings are in particular between 1 mm and 3 mm in size.
  • the cross section of the drainage openings provided in the region of the side walls is at least in part equal to or 10% to 30% smaller than the cross section of the elevations.
  • the cross section of the drainage openings arranged in the intermediate space of the successive elevations is at least in part equal or 10% to 30% greater than the cross section of the successive drainage openings which lie between the side walls.
  • the drainage openings are arranged in the circumferential direction or production direction behind the elevations in the same row one behind the other and are equal to or greater than the drainage openings are arranged in series and not seen in the production direction behind the elevations and that the drainage openings are approximately as wide as the elevations, wherein the width of the elevations and the underlying drainage openings are approximately between 2.5 mm and 3.5 mm, preferably 3 mm wide and the drainage openings seen in the production direction has a length between 0.5 mm to 3.5 mm, preferably 1 mm, while the drainage holes completely fill the space between the elevations.
  • FIG. 1 is a schematic representation of a surface of the apparatus shown in FIG. 4 for the production of openwork nonwoven fabrics
  • 2 is a sectional view taken along the line A - B of FIG. 1
  • FIG. 3 is a front view of the increase of the carrier device or the screen drum
  • FIG. 4 the carrier device according to FIG. 1, which is designed as a sieve drum in the exemplary embodiment, FIG.
  • FIG. 5 shows a partial view of the surface of the carrier device according to FIG. 4.
  • At least one support device is denoted by 1, which is formed according to FIG. 4 as a drum shell with elevations 3.
  • the individual elevations 3 can be arranged in the form of a checkerboard pattern with uniform spacing on a surface 2 of the carrier device 1.
  • the elevations 3 serve to perforate a nonwoven fabric, not shown in the drawing.
  • the elevations 3 shown in FIG. 3 have a uniform spacing from one another.
  • the distances of the individual elevations may also have a different distance from each other.
  • each elevation 3 consists of two parallel side walls 6 which extend in the circumferential direction of the carrier device or drum shell 1. Furthermore, each elevation 3 has two side walls 7 extending in the axial direction of the drum shell. The side walls 6 and 7 of the drum shell 1 are aligned rectangular to each other. The four side walls 6 to 7 are bounded at the top by a surface 5 inclined or roof-shaped or truncated with respect to the surface 2 of the drum shell 1.
  • the surface 5 of the elevation 3 may include an angle a (FIG. 2) with the surface 2 of the carrier device 1 that is equal to or greater than 0 °, in particular greater than 5 ° to 25 °.
  • the side walls 6 and 7 form with the surface 2 of the drum shell 1 an angle ß, which may be between 80 ° and 110 °, preferably 90 °.
  • the two adjacent surfaces 5 of two elevations 3 may include a V-shaped angle ⁇ that is smaller than 180 ° or between 100 ° and 130 °, respectively.
  • the surfaces 5 of the elevations 3 are inclined in the conveying direction, arranged.
  • the surfaces 5 can also be arranged inclined in the opposite direction of conveyance to the surface 2 of the drum shell 1.
  • FIG. 1 there are numerous drainage openings 4, 4.1 on the surface 2 of the drum shell 1.
  • the drainage openings are the same size. According to FIG. 1, the drainage openings can also be of different sizes.
  • the drainage openings 4 in the intermediate spaces of the circumferentially extending elevations 3 are greater than 0.3 mm, in particular between 0.4 mm and 3 mm in size.
  • the provided in the region of the side walls 6 and 7 drainage openings 4, 4.1 may, for. T. between 0.3 mm and 1 mm and another part of the drainage openings 4 between 0.4 mm and 3 mm in size.
  • the cross-section of the drainage openings 4 lying in the intermediate space to be at least partially between 10% and 30% greater than the cross-section of the rearward one.
  • the individual elevations or drainage openings 4 are arranged approximately symmetrically distributed on the surface of the support device 1.
  • the drainage openings 4 are arranged in the circumferential direction or production direction according to arrow 8 behind the elevations 3 in the same row behind each other and are equal or advantageously greater than the elevations 4.1, which are arranged in series and in Production direction can not be seen behind the increases.
  • the drainage openings 4 can be approximately as wide as the elevations.
  • the width of the elevation and the drainage openings 4 lying behind can be approximately between 2.5 mm and 3.5 mm, preferably 3 mm, and the drainage openings 4 can have a length of 0.5 mm to 3.5 mm, preferably 1 mm, in the direction of production.
  • the drainage openings 4 can also completely fill the intermediate space between the elevations 3, so that the water can easily run off in the circumferential direction.
  • Some of the drainage openings 4.1 may have a different cross-sectional opening and, viewed in the direction of production, may be mutually offset relative to one another.

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

Abstract

A device for the production of perforated nonwoven fabrics utilizing a hydrodynamic needling device and a carrier device (1), on the surface (2) of which multiple elevations (3) are disposed at a distance to each other, in the range of which drainage openings (4) are provided for carrying off fluid exiting from the needling device, wherein at least some of the elevations (3) in respect of the surface (2) of the carrier device (1) have inclined, and/or rounded surfaces (5) that can be brought into contact with the nonwoven fabric.

Description

Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen Device for the production of openwork nonwovens
Die Erfindung betrifft eine Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen mit Hilfe einer hydrodynamischen Vernadelungseinrichtung und einer Trägervorrichtung, auf deren Oberfläche mehrere Erhöhungen mit Abstand zueinander angeordnet sind, in deren Bereich Drainageöffnungen zum Abtransport von aus der Vernadelungseinrichtung austretender Flüssigkeit vor- gesehen sind, wobei die Erhöhungen mit Bezug auf die Oberfläche der Trägervorrichtung zumindest teilweise geneigte und/oder abgerundete mit dem Vliesstoff in Kontakt bringbare Flächen aufweisen.The invention relates to a device for the production of perforated nonwovens by means of a hydrodynamic needling device and a carrier device, on whose surface a plurality of elevations are arranged at a distance from each other, in whose area drainage openings for the removal of escaping from the needling device liquid are provided, wherein the elevations with respect to the surface of the support device at least partially inclined and / or rounded contact with the nonwoven fabric contact surfaces.
Es ist bereits ein Verfahren zur Herstellung von durchbrochenen Vliesstoffen bekannt (EP 0 215 684 B1 Uni Charm), die mit einer Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen mit Hilfe einer hydrodynamischen Vernadelungseinrichtung und einer Trägervorrichtung bzw. Trommel ausgestattet ist, auf deren Oberfläche mehrere Erhöhungen mit Abstand zueinander angeordnet sind, in deren Bereich Drainageöffnungen zum Abtransport von aus der Verna- delungseinrichtung austretender Flüssigkeit vorgesehen sind, wobei die Erhöhungen mit Bezug auf die Oberfläche der Trägervorrichtung zumindest teilweise geneigte und/oder abgerundete mit dem Vliesstoff in Kontakt bringbare Flächen aufweist. Die Abstände zwischen den Erhöhungen können in Umfangsrichtung und auch in Querrichtung der Trägervorrichtung bzw. der Trommel einen gleichmäßigen Abstand untereinander aufweisen. Mit einer derartigen Einrichtung werden Vliesstoffe perforiert, wobei durch die Ausrichtung und Formgebung der Erhöhungen in Förderrichtung des mit Hilfe der Trommel weiterbewegten Vliesstoffes mehr Fasern auftreten als in Querrichtung. Die ungleichmäßige Verteilung der Fasern bzw. das Wegwaschen der Fasern im Vlies mit Bezug auf die Bewegungsrichtung des Vlieses nach rechts und links geschieht mit Hilfe des ungünstig auf das Vlies auftreffenden Wasserstrahls bei gleichzeitiger Weiterbewegung des Vlieses mit Hilfe der Trommel. Der Erfindung liegt die Aufgabe zugrunde mit der Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen eine gleichmäßige Orientierung und/oder Verteilung der Faserwerkstoffe bzw. der Filamente im Vliesstoff sicherzustellen.A process for the production of openwork nonwovens is already known (EP 0 215 684 B1 Uni Charm), which is equipped with a device for the production of openwork nonwovens by means of a hydrodynamic needling device and a carrier device or drum, on whose surface a plurality of elevations Disposed at a distance from one another, in the region of which drainage openings are provided for the removal of liquid emerging from the netting device, the elevations with respect to the surface of the carrier device having at least partially inclined and / or rounded surfaces which can be brought into contact with the nonwoven fabric. The distances between the elevations may have a uniform distance from each other in the circumferential direction and also in the transverse direction of the carrier device or the drum. With such a device, nonwovens are perforated, whereby more fibers occur in the direction of conveyance of the nonwoven fabric moving further with the aid of the drum than in the transverse direction due to the alignment and shaping of the elevations. The uneven distribution of the fibers or the washing away of the fibers in the fleece with respect to the direction of movement of the fleece to the right and left is done with the help of the unfavorable incident on the fleece water jet while continuing to move the fleece using the drum. The invention is based on the object with the apparatus for producing perforated nonwovens to ensure a uniform orientation and / or distribution of the fiber materials or filaments in the nonwoven fabric.
Die Aufgabe wird gemäß der Erfindung durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Hierdurch wird eine optimale Orientierung der Filamente im Vliesstoff gewährleistet und sichergestellt, dass der Vliesstoff eine gleichmäßige Stärke aufweist, da die Faserstoffe an bestimmten Stellen nicht mehr herausgeschwemmt werden wie das bisher beim Stand der Technik üblich war.The object is achieved according to the invention by the characterizing features of claim 1. This ensures optimal orientation of the filaments in the nonwoven fabric and ensures that the nonwoven fabric has a uniform thickness, since the fibers are no longer washed out at certain points as was usual in the prior art.
Eine zusätzliche Möglichkeit ist gemäß einer Weiterbildung der Erfindung, dass die auf der Oberfläche der Trägervorrichtung vorgesehenen Erhöhungen zumindest zwei in Förderrichtung der Trägervorrichtung in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände aufweisen, die durch mindestens eine Oberfläche begrenzt werden, die mit der Oberfläche der Trägervorrichtung einen Winkel a einschließt, der kleiner als 0° ist.An additional possibility, according to a development of the invention, that the measures provided for on the surface of the support device elevations at least two in the conveying direction of the support device in approximately parallel, at least approximately upright side walls, which are bounded by at least one surface, with the surface of the Carrier device includes an angle a, which is smaller than 0 °.
Ferner ist es vorteilhaft, dass die Oberfläche, die durch die Seitenwände begrenzt wird, mit der Trägervorrichtung einen Winkel a einschließt, der zwischen 0° und 80° insbesondere zwischen 20° und 45° groß ist. Hierdurch werden die Filamente im Vliesstoff optimal in Längsrichtung und zum Teil auch in Querrich- tung des Vliesstoffes ausgerichtet. Dadurch wird über die gesamte Vliesfläche eine gleichmäßige Verteilung der Faser sichergestellt.Furthermore, it is advantageous that the surface which is delimited by the side walls encloses an angle α with the carrier device which is between 0 ° and 80 °, in particular between 20 ° and 45 °. As a result, the filaments in the nonwoven fabric are aligned optimally in the longitudinal direction and in part also in the transverse direction of the nonwoven fabric. As a result, a uniform distribution of the fiber is ensured over the entire nonwoven surface.
Vorteilhaft ist es auch, dass die Seitenwände der Erhöhungen annähernd flach ausgebildet sind.It is also advantageous that the side walls of the elevations are formed approximately flat.
Von besonderer Bedeutung ist für die vorliegende Erfindung, dass die auf der Oberfläche der Trägervorrichtung vorgesehenen Erhöhungen zumindest zwei quer zur Förderrichtung der Trägervorrichtung in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände aufweisen, die durch mindestens die eine Oberfläche begrenzt werden, die mit der Oberfläche der Trägervorrichtung einen Winkel a einschließt, der größer als 0° ist. Ferner ist es vorteilhaft, dass die auf der Oberfläche der Trägervorrichtung vorgesehenen Erhöhungen zumindest zwei quer zur Förderrichtung der Trägervorrichtung in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände aufweisen, die durch mindestens die eine flache Oberfläche be- grenzt werden, die mit der Oberfläche der Trägervorrichtung einen Winkel /? einschließt, der zwischen 80° und 90° groß ist.Of particular importance for the present invention is that the elevations provided on the surface of the support device have at least two transverse to the conveying direction of the support device in approximately parallel, at least approximately upright side walls, which are bounded by at least the one surface with the surface the support device includes an angle α greater than 0 °. Furthermore, it is advantageous for the elevations provided on the surface of the carrier device to have at least two, at least approximately transversely to the conveying direction of the carrier device, approximately parallel, at least approximately upright side walls which are delimited by at least the one flat surface which is in contact with the surface of the carrier device Carrier device an angle /? which is between 80 ° and 90 °.
Eine zusätzliche Möglichkeit ist gemäß einer Weiterbildung der Erfindung, dass die nach außen gerichteten Oberflächen der beiden nebeneinander liegenden Erhöhungen in etwa V-förmig zueinander ausgerichtet sind. Hierdurch erhält man ein Vlies mit großen Löchern, wobei die Vliesstärke und die Orientierung der Filamente insbesondere zwischen den Löchern des Vlieses in Längs- und in Achsrichtung der Trommel annähernd gleich ist.An additional possibility, according to an embodiment of the invention, that the outwardly facing surfaces of the two adjacent elevations are aligned approximately V-shaped to each other. This results in a nonwoven with large holes, wherein the nonwoven thickness and the orientation of the filaments, in particular between the holes of the nonwoven in the longitudinal and axial direction of the drum is approximately equal.
In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, dass die nach außen gerichteten Oberflächen der beiden nebeneinander liegenden Erhöhungen in etwa V-förmig oder etwa dachförmig ausgebildet sind oder einen Winkel δ einschließen, der kleiner als 180° ist oder die Oberfläche einer jeden Erhöhung dachförmig ausgebildet ist.In a further embodiment of the invention, it is advantageous that the outwardly directed surfaces of the two adjacent elevations are approximately V-shaped or approximately roof-shaped or enclose an angle δ which is smaller than 180 ° or the surface of each elevation roof-shaped is.
Außerdem ist es vorteilhaft, dass die nach außen gerichtete Oberfläche der Erhöhung in und/oder entgegengesetzt zur Förderrichtung des Vlieses geneigt verlaufend angeordnet ist.Moreover, it is advantageous for the outwardly directed surface of the elevation to be inclined in and / or opposite to the conveying direction of the fleece.
Hierzu ist es vorteilhaft, dass in der Ansicht von oben die Querschnittsfläche der Erhöhung mehreck-, rechteck-, kreis- oder ovalförmig ausgebildet ist.For this purpose, it is advantageous that, in the view from above, the cross-sectional area of the elevation is polygonal, rectangular, circular or oval-shaped.
Vorteilhaft ist es ferner, dass die im Bereich der Seitenwände vorgesehenen Drainageöffnungen größer als 0,3 mm, insbesondere zwischen 0,4 mm und 3 mm, sind.It is also advantageous that the drainage openings provided in the region of the side walls are greater than 0.3 mm, in particular between 0.4 mm and 3 mm.
In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, dass die im Bereich der Seitenwände vorgesehenen Drainageöffnungen zum Teil größer als 0,1 mm und ein weiterer Teil der Drainageöffnungen insbesondere zwischen 1 mm und 3 mm groß sind.In a further embodiment of the invention, it is advantageous that the drainage openings provided in the region of the side walls are in some cases greater than 0.1 mm and another part of the drainage openings are in particular between 1 mm and 3 mm in size.
Außerdem ist es vorteilhaft, dass der Querschnitt der im Bereich der Seiten- wände vorgesehenen Drainageöffnungen zumindest zum Teil gleich groß oder 10% bis 30% kleiner ist als der Querschnitt der Erhöhungen.In addition, it is advantageous that the cross section of the drainage openings provided in the region of the side walls is at least in part equal to or 10% to 30% smaller than the cross section of the elevations.
In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, dass der Querschnitt der im Zwischenraum der hintereinander liegenden Erhöhungen angeordneten Drainageöffnungen zumindest zum Teil gleich groß oder 10% bis 30% größer ist als der Querschnitt der hintereinander liegenden Drainageöffnungen, die zwischen den Seitenwänden liegen.In a further embodiment of the invention, it is advantageous that the cross section of the drainage openings arranged in the intermediate space of the successive elevations is at least in part equal or 10% to 30% greater than the cross section of the successive drainage openings which lie between the side walls.
Vorteilhaft ist es ferner, dass die Drainageöffnungen in Umfangsrichtung bzw. Produktionsrichtung gesehen hinter den Erhöhungen in der gleichen Reihe hintereinander angeordnet und gleich oder größer sind als die Drainageöffnungen sind, die in Reihe angeordnet sind und die in Produktionsrichtung gesehen nicht hinter den Erhöhungen liegen und dass die Drainageöffnungen in etwa so breit sind wie die Erhöhungen, wobei die Breite der Erhöhungen und der dahinter liegenden Drainageöffnungen in etwa zwischen 2.5 mm und 3,5 mm vorzugsweise 3 mm breit sind und die Drainageöffnungen in Produktionsrichtung gesehen eine Länge zwischen 0,5 mm bis 3.5 mm vorzugsweise von 1 mm aufweisen, während die Drainageöffnungen den Zwischenraum zwischen den Erhöhungen komplett ausfüllen.It is also advantageous that the drainage openings are arranged in the circumferential direction or production direction behind the elevations in the same row one behind the other and are equal to or greater than the drainage openings are arranged in series and not seen in the production direction behind the elevations and that the drainage openings are approximately as wide as the elevations, wherein the width of the elevations and the underlying drainage openings are approximately between 2.5 mm and 3.5 mm, preferably 3 mm wide and the drainage openings seen in the production direction has a length between 0.5 mm to 3.5 mm, preferably 1 mm, while the drainage holes completely fill the space between the elevations.
Weitere Vorteile und Einzelheiten der Erfindung sind in den Patentansprüchen beschrieben und in der Beschreibung erläutert und in den Figuren dargestellt.Further advantages and details of the invention are described in the claims and explained in the description and illustrated in the figures.
Es zeigen:Show it:
Fig. 1 eine schematische Darstellung einer Oberfläche der in Fig. 4 dargestellten Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen, Fig. 2 eine Schnittdarstellung entlang der Linie A - B gemäß Fig. 1 ,1 is a schematic representation of a surface of the apparatus shown in FIG. 4 for the production of openwork nonwoven fabrics, 2 is a sectional view taken along the line A - B of FIG. 1,
Fig. 3 eine Vorderansicht der Erhöhung der Trägervorrichtung bzw. der Siebtrommel,3 is a front view of the increase of the carrier device or the screen drum,
Fig. 4 die Trägervorrichtung gemäß Fig. 1 , die im Ausführungsbeispiel als Siebtrommel ausgebildet ist,4, the carrier device according to FIG. 1, which is designed as a sieve drum in the exemplary embodiment, FIG.
Fig. 5 eine Teilansicht der Oberfläche der Trägervorrichtung gemäß Fig. 4.5 shows a partial view of the surface of the carrier device according to FIG. 4.
In der Zeichnung ist mindestens eine Trägervorrichtung mit 1 bezeichnet, die gemäß Fig. 4 als Trommelschale mit Erhöhungen 3 ausgebildet ist. Die einzelnen Erhöhungen 3 können in Form eines Schachbrettmusters mit gleichmäßi- gern Abstand auf einer Oberfläche 2 der Trägervorrichtung 1 angeordnet sein. Die Erhöhungen 3 dienen zur Perforation eines in der Zeichnung nicht dargestellten Vliesstoffes.In the drawing, at least one support device is denoted by 1, which is formed according to FIG. 4 as a drum shell with elevations 3. The individual elevations 3 can be arranged in the form of a checkerboard pattern with uniform spacing on a surface 2 of the carrier device 1. The elevations 3 serve to perforate a nonwoven fabric, not shown in the drawing.
Die in Fig. 3 dargestellten Erhöhungen 3 weisen, wie bereits erwähnt, einen gleichmäßigen Abstand untereinander auf. Je nach Ausführungsform können die Abstände der einzelnen Erhöhungen auch einen unterschiedlich großen Abstand untereinander aufweisen.As already mentioned, the elevations 3 shown in FIG. 3 have a uniform spacing from one another. Depending on the embodiment, the distances of the individual elevations may also have a different distance from each other.
Wie insbesondere aus den Fig. 1 bis 3 hervorgeht, besteht jede Erhöhung 3 aus zwei parallel verlaufenden Seitenwänden 6, die sich in Umfangsrichtung der Trägervorrichtung bzw. der Trommelschale 1 erstrecken. Ferner weist jede Erhöhung 3 zwei sich in Achsrichtung der Trommelschale erstreckende Seitenwände 7 auf. Die Seitenwände 6 und 7 der Trommelschale 1 sind rechteckför- mig zueinander ausgerichtet. Die vier Seitenwände 6 bis 7 werden nach oben durch eine mit Bezug auf die Oberfläche 2 der Trommelschale 1 geneigt verlaufende oder dachförmig oder pyramidenstumpfförmig ausgebildete Oberfläche 5 begrenzt. Die Oberfläche 5 der Erhöhung 3 kann mit der Oberfläche 2 der Trägervorrichtung 1 einen Winkel a (Fig. 2) einschließen, der gleich oder größer als 0° insbesondere größer als 5° bis 25° ist.As can be seen in particular from FIGS. 1 to 3, each elevation 3 consists of two parallel side walls 6 which extend in the circumferential direction of the carrier device or drum shell 1. Furthermore, each elevation 3 has two side walls 7 extending in the axial direction of the drum shell. The side walls 6 and 7 of the drum shell 1 are aligned rectangular to each other. The four side walls 6 to 7 are bounded at the top by a surface 5 inclined or roof-shaped or truncated with respect to the surface 2 of the drum shell 1. The surface 5 of the elevation 3 may include an angle a (FIG. 2) with the surface 2 of the carrier device 1 that is equal to or greater than 0 °, in particular greater than 5 ° to 25 °.
Die Seitenwände 6 und 7 bilden mit der Oberfläche 2 der Trommelschale 1 einen Winkel ß, der zwischen 80° und 110° vorzugsweise 90° groß sein kann.The side walls 6 and 7 form with the surface 2 of the drum shell 1 an angle ß, which may be between 80 ° and 110 °, preferably 90 °.
Gemäß Fig. 2 können die beiden nebeneinander liegenden Oberflächen 5 zweier Erhöhungen 3 einen V-förmigen Winkel δ einschließen, der kleiner als 180° bzw. zwischen 100° und 130° groß ist.According to FIG. 2, the two adjacent surfaces 5 of two elevations 3 may include a V-shaped angle δ that is smaller than 180 ° or between 100 ° and 130 °, respectively.
In vorteilhafter Weise sind die Oberflächen 5 der Erhöhungen 3 in Förderrichtung geneigt verlaufend, angeordnet. Die Oberflächen 5 können auch in entgegen gesetzter Förderrichtung geneigt verlaufend zur Oberfläche 2 der Trom- melschale 1 angeordnet sein.Advantageously, the surfaces 5 of the elevations 3 are inclined in the conveying direction, arranged. The surfaces 5 can also be arranged inclined in the opposite direction of conveyance to the surface 2 of the drum shell 1.
Wie aus der Fig. 1 und insbesondere aus den Fig. 4 und 5 hervorgeht, befinden sich an der Oberfläche 2 der Trommelschale 1 zahlreiche Drainageöffnun- gen 4, 4.1. Im Ausführungsbeispiel gemäß Fig. 5 sind die Drainageöffnungen gleich groß. Gemäß Fig. 1 können die Drainageöffnungen auch von unterschiedlicher Größe sein.As is apparent from FIG. 1 and in particular from FIGS. 4 and 5, there are numerous drainage openings 4, 4.1 on the surface 2 of the drum shell 1. In the embodiment of FIG. 5, the drainage openings are the same size. According to FIG. 1, the drainage openings can also be of different sizes.
Vorteilhaft ist es, dass die Drainageöffnungen 4 in den Zwischenräumen der in Umfangsrichtung sich erstreckenden Erhöhungen 3 größer als 0,3 mm, insbe- sondere zwischen 0,4 mm und 3 mm groß sind.It is advantageous that the drainage openings 4 in the intermediate spaces of the circumferentially extending elevations 3 are greater than 0.3 mm, in particular between 0.4 mm and 3 mm in size.
Die im Bereich der Seitenwände 6 und 7 vorgesehenen Drainageöffnungen 4, 4.1 können z. T. zwischen 0,3 mm und 1 mm und ein weiterer Teil der Drainageöffnungen 4 zwischen 0,4 mm und 3 mm groß sein.The provided in the region of the side walls 6 and 7 drainage openings 4, 4.1 may, for. T. between 0.3 mm and 1 mm and another part of the drainage openings 4 between 0.4 mm and 3 mm in size.
Ferner ist es auch möglich, dass gemäß Fig. 1 der Querschnitt der im Zwischenraum von den hintereinander liegenden Drainageöffnungen 4 zumindest zum Teil zwischen 10% und 30% größer ist als der Querschnitt der hintereinan- der liegenden Drainageöffnungen 4.1 zwischen den Seitenwänden 6. Die einzelnen Erhöhungen oder Drainageöffnungen 4 sind in etwa symmetrisch verteilt auf der Oberfläche der Trägervorrichtung 1 angeordnet.Furthermore, it is also possible, according to FIG. 1, for the cross-section of the drainage openings 4 lying in the intermediate space to be at least partially between 10% and 30% greater than the cross-section of the rearward one. the lying drainage openings 4.1 between the side walls 6. The individual elevations or drainage openings 4 are arranged approximately symmetrically distributed on the surface of the support device 1.
Vorteilhaft ist es auch, wenn die Drainageöffnungen 4 in Umfangsrichtung bzw. Produktionsrichtung gemäß Pfeil 8 gesehen hinter den Erhöhungen 3 in der gleichen Reihe hintereinander angeordnet sind und gleich oder in vorteilhafter Weise größer sind als die Erhöhungen 4.1 , die in Reihe angeordnet sind und die in Produktionsrichtung gesehen nicht hinter den Erhöhungen liegen. Die Drainageöffnungen 4 können in etwa so breit sein wie die Erhöhungen. Die Breite der Erhöhung und der dahinter liegenden Drainageöffnungen 4 können in etwa zwischen 2.5 mm und 3,5 mm, vorzugsweise 3 mm sein und die Drainageöffnungen 4 können in Produktionsrichtung gesehen eine Länge von 0,5 mm bis 3.5 mm vorzugsweise von 1 mm aufweisen. Die Drainageöffnungen 4 kön- nen auch den Zwischenraum zwischen den Erhöhungen 3 komplett ausfüllen, damit das Wasser in Umfangsrichtung leicht ablaufen kann. Die Drainageöffnungen 4.1 können teilweise auch eine unterschiedliche Querschnittsöffnung aufweisen und in Produktionsrichtung gesehen gegenseitig versetzt zueinander angeordnet sein. It is also advantageous if the drainage openings 4 are arranged in the circumferential direction or production direction according to arrow 8 behind the elevations 3 in the same row behind each other and are equal or advantageously greater than the elevations 4.1, which are arranged in series and in Production direction can not be seen behind the increases. The drainage openings 4 can be approximately as wide as the elevations. The width of the elevation and the drainage openings 4 lying behind can be approximately between 2.5 mm and 3.5 mm, preferably 3 mm, and the drainage openings 4 can have a length of 0.5 mm to 3.5 mm, preferably 1 mm, in the direction of production. The drainage openings 4 can also completely fill the intermediate space between the elevations 3, so that the water can easily run off in the circumferential direction. Some of the drainage openings 4.1 may have a different cross-sectional opening and, viewed in the direction of production, may be mutually offset relative to one another.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 Trägervorrichtung, Trommelschale1 carrier device, drum shell
2 Oberfläche2 surface
3 Erhöhung3 increase
4 Drainageöffnung4 drainage opening
4.1 Drainageöffnung 5 Oberfläche, Fläche4.1 drainage opening 5 surface, surface
6 Seitenwand6 side wall
7 Seitenwand7 sidewall
8 Pfeil8 arrow
Winkel σAngle σ
Winkel ßAngle ß
Winkel δ Angle δ

Claims

Patentansprüche: claims:
1. Vorrichtung zur Herstellung von durchbrochenen Vliesstoffen mit Hilfe einer hydrodynamischen Vernadelungseinrichtung und einer Trägervorrichtung (1 ), auf deren Oberfläche (2) mehrere Erhöhungen (3) mit Abstand zueinander angeordnet sind, in deren Bereich Drainageöffnungen (4) zum Abtransport von aus der Vernadelungseinrichtung austretender Flüssigkeit vorgesehen sind und mit dem Vliesstoff in Kontakt bringbare Erhöhungen (3) der Oberfläche (2) der Trägervorrichtung (1 ) aufweist, dadurch gekennzeichnet, dass die Erhöhungen (3) die Form eines Pyramidenstumpfes oder eines Schrägdaches aufweisen und ebenso wie die Drainageöffnungen (4) in etwa symmetrisch auf der Oberfläche (2) der Trägervorrichtung (1 ) verteilt angeordnet sind, so dass eine gleichmäßige Verteilung und/oder Orientierung der Fasern bzw. der Filamente im Vlies sichergestellt ist.1. Apparatus for producing openwork nonwoven fabrics by means of a hydrodynamic needling device and a carrier device (1), on the surface (2) a plurality of elevations (3) are arranged at a distance from each other, in the region of drainage openings (4) for the removal of from the needling device 3) of the surface (2) of the carrier device (1), characterized in that the elevations (3) have the shape of a truncated pyramid or a sloping roof and as well as the drainage openings ( 4) are distributed approximately symmetrically on the surface (2) of the carrier device (1), so that a uniform distribution and / or orientation of the fibers or of the filaments in the fleece is ensured.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die auf der Oberfläche (2) der Trägervorrichtung (1 ) vorgesehenen Erhöhungen (3) zumindest zwei in Förderrichtung der Trägervorrichtung (1 ) in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände (6) aufweisen, die durch mindestens eine Oberfläche (5) begrenzt werden, die mit der Oberfläche (2) der Trägervorrichtung (1 ) einen Winkel a einschließt, der kleiner als 90° ist.2. Device according to claim 1, characterized in that on the surface (2) of the support device (1) provided elevations (3) at least two in the conveying direction of the support device (1) approximately parallel, at least approximately upright side walls (6) characterized by at least one surface (5) bounded, which with the surface (2) of the support device (1) forms an angle a, which is smaller than 90 °.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Oberfläche (2), die durch die Seitenwände (6) begrenzt wird, mit der Trägervorrichtung (1 ) einen Winkel a einschließt, der zwischen 0° und 80° insbesondere zwischen 20° und 45° groß ist.3. Device according to claim 1 or 2, characterized in that the surface (2) which is bounded by the side walls (6), with the support device (1) encloses an angle a, between 0 ° and 80 °, in particular between the 20th ° and 45 ° is large.
4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Seitenwände (6) der Erhöhungen (3) annähernd flach ausgebildet sind. 4. Apparatus according to claim 2, characterized in that the side walls (6) of the elevations (3) are formed approximately flat.
5. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die auf der Oberfläche (2) der Trägervorrichtung (1 ) vorgesehenen Erhöhungen (3) zumindest zwei quer zur Förderrichtung der Trägervorrichtung (1 ) in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände (7) auf- weisent, die durch mindestens die eine Oberfläche (5) begrenzt werden, die mit der Oberfläche (2) der Trägervorrichtung (1 ) einen Winkel a einschließt, der größer als 0° ist.5. The device according to claim 1, characterized in that on the surface (2) of the support device (1) provided for elevations (3) at least two transverse to the conveying direction of the support device (1) approximately parallel, at least approximately upright side walls (7 ) bounded by at least one surface (5) which forms an angle a greater than 0 ° with the surface (2) of the support device (1).
6. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die auf der Oberfläche (2) der Trägervorrichtung (1 ) vorgesehenen Erhöhungen (3) zumindest zwei quer zur Förderrichtung der Trägervorrichtung (1 ) in etwa parallel verlaufende, zumindest annähernd aufrecht stehende Seitenwände (7) aufweisen, die durch mindestens die eine flache Oberfläche (5) begrenzt werden, die mit der Oberfläche (2) der Trägervorrichtung (1 ) einen Winkel ß einschließt, der zwischen 80° und 110°, vorzugsweise 90° groß ist.6. The device according to claim 1, characterized in that on the surface (2) of the support device (1) provided increases (3) at least two transverse to the conveying direction of the support device (1) approximately parallel, at least approximately upright side walls (7 ) bounded by at least one flat surface (5) enclosing with the surface (2) of the support device (1) an angle β which is between 80 ° and 110 °, preferably 90 °.
7. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die nach außen gerichteten Oberflächen (5) der beiden nebeneinander liegenden Erhöhungen (3) in etwa V-förmig zueinander ausgerichtet sind.7. The device according to claim 1, characterized in that the outwardly directed surfaces (5) of the two adjacent elevations (3) are aligned approximately V-shaped to each other.
8. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die nach außen gerichteten Oberflächen (5) der beiden nebeneinander liegenden Erhöhungen (3) einen Winkel δ einschließen, der kleiner als 180° ist.8. The device according to claim 1, characterized in that the outwardly directed surfaces (5) of the two adjacent elevations (3) enclose an angle δ, which is smaller than 180 °.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die nach außen gerichtete Oberfläche (5) der Erhöhung (3) in und/oder entgegengesetzt zur Förderrichtung des Vlieses geneigt verlaufend angeordnet ist.9. Device according to one of the preceding claims, characterized in that the outwardly directed surface (5) of the elevation (3) is arranged inclined in and / or opposite to the conveying direction of the web inclined.
10. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Ansicht von oben die Querschnittsfläche der Erhöhung (3) mehreck-, rechteck-, kreis- oder ovalförmig ausgebildet ist. 10. Device according to one of the preceding claims, characterized in that in the view from above, the cross-sectional area of the elevation (3) is polygonal, rectangular, circular or oval-shaped.
11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die im Bereich der Seitenwände (6, 7) vorgesehenen Drai- nageöffnungen (4) größer als 0,3 mm, insbesondere zwischen 0,4 mm und 3 mm, sind.11. Device according to one of the preceding claims, characterized in that in the region of the side walls (6, 7) provided drainage nageöffnungen (4) are greater than 0.3 mm, in particular between 0.4 mm and 3 mm.
12. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die im Bereich der Seitenwände (6, 7) vorgesehenen Drai- nageöffnungen (4, 4,1 ) zum Teil größer als 0,1 mm und ein weiterer Teil der Drainageöffnungen (4) insbesondere zwischen 1 mm und 3 mm groß sind.12. Device according to one of the preceding claims, characterized in that in the region of the side walls (6, 7) provided drainage nageöffnungen (4, 4.1) partly greater than 0.1 mm and a further part of the drainage openings (4 ) are in particular between 1 mm and 3 mm in size.
13. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Querschnitt der im Bereich der Seitenwände (6, 7) vorgesehenen Drainageöffnungen (4, 4,1 ) zumindest zum Teil gleich groß oder 10% bis 30% kleiner ist als der Querschnitt der Erhöhungen (3).13. Device according to one of the preceding claims, characterized in that the cross section of the in the region of the side walls (6, 7) provided drainage openings (4, 4.1) is at least partially equal to or 10% to 30% smaller than the cross section of the elevations (3).
14. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Querschnitt der im Zwischenraum der hintereinander liegenden Erhöhungen (3) angeordneten Drainageöffnungen (4) zumindest zum Teil gleich groß oder 10% bis 30% größer ist als der Querschnitt der hinterein- ander liegenden Drainageöffnungen (4,1 ), die zwischen den Seitenwänden liegen.14. Device according to one of the preceding claims, characterized in that the cross section of the intermediate space of the successive elevations (3) arranged drainage openings (4) is at least equal to or equal to 10% to 30% greater than the cross-section of the other lying drainage openings (4,1), which lie between the side walls.
15. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Drainageöffnungen (4) in Umfangsrichtung bzw. Pro- duktionsrichtung gesehen hinter den Erhöhungen (3) in der gleichen Reihe hintereinander angeordnet und gleich oder größer sind als die Drainageöffnungen (4.1 ) sind, die in Reihe angeordnet sind und die in Produktionsrichtung gesehen nicht hinter den Erhöhungen (3) liegen.15. Device according to one of the preceding claims, characterized in that the drainage openings (4) in the circumferential direction or production direction seen behind the ridges (3) in the same row arranged one behind the other and are equal to or greater than the drainage openings (4.1) which are arranged in series and which, viewed in the direction of production, are not behind the elevations (3).
16. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Drainageöffnungen (4) in etwa so breit sind wie die Erhöhungen (3), wobei die Erhöhungen und die dahinter liegenden Drainageöffnungen (4) in etwa zwischen 2.5 mm und 3,5 mm, vorzugsweise 3 mm, breit sind und die Drainageöffnungen (4) den Zwischenraum zwischen den Erhöhungen (3) komplett ausfüllen. 16. Device according to one of the preceding claims, characterized in that the drainage openings (4) are approximately as wide as the elevations (3), wherein the elevations and the underlying drainage openings (4) in approximately between 2.5 mm and 3.5 mm, preferably 3 mm, wide and the drainage openings (4) completely fill the space between the elevations (3).
EP07725939A 2006-07-31 2007-06-09 Device for the production of perforated nonwoven fabrics Active EP2047020B1 (en)

Priority Applications (1)

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PL07725939T PL2047020T3 (en) 2006-07-31 2007-06-09 Device for the production of perforated nonwoven fabrics

Applications Claiming Priority (2)

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DE102006035914A DE102006035914B3 (en) 2006-07-31 2006-07-31 Pressure plate for the production of a water-permeable fleece web in paper manufacture has drain holes for effluent water
PCT/EP2007/005114 WO2008014842A1 (en) 2006-07-31 2007-06-09 Device for the production of perforated nonwoven fabrics

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EP2047020B1 EP2047020B1 (en) 2012-10-03

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DE (1) DE102006035914B3 (en)
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DE102008029057A1 (en) * 2008-06-18 2009-12-24 Fleissner Gmbh Method and device for producing a filament-containing nonwoven fabric
RU2667871C2 (en) * 2014-04-08 2018-09-24 Ска Хайджин Продактс Аб Method for manufacture of flushable hydroentangled moist cleaning wipes or hygienic tissue

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JPH0663165B2 (en) * 1985-11-20 1994-08-17 ユニ・チヤ−ム株式会社 Nonwoven fabric manufacturing method and apparatus
DE3685277D1 (en) * 1985-09-20 1992-06-17 Uni Charm Corp DEVICE AND METHOD FOR PRODUCING BREAKTHROUGH nonwovens.
US5098764A (en) * 1990-03-12 1992-03-24 Chicopee Non-woven fabric and method and apparatus for making the same
TW273531B (en) * 1991-08-14 1996-04-01 Chicopee Textile-like apertured plastic films
ATE191020T1 (en) * 1994-11-02 2000-04-15 Procter & Gamble METHOD FOR PRODUCING NONWOVEN MATERIALS
JP3366849B2 (en) * 1997-12-26 2003-01-14 ユニ・チャーム株式会社 Manufacturing method of perforated nonwoven fabric
DE19852717A1 (en) * 1998-11-16 2000-05-18 Fleissner Maschf Gmbh Co Device for the production of perforated nonwovens by means of hydrodynamic needling

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