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EP1340843B1 - Apparatus for the continuous production of a spunbonded web - Google Patents

Apparatus for the continuous production of a spunbonded web Download PDF

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Publication number
EP1340843B1
EP1340843B1 EP02004615A EP02004615A EP1340843B1 EP 1340843 B1 EP1340843 B1 EP 1340843B1 EP 02004615 A EP02004615 A EP 02004615A EP 02004615 A EP02004615 A EP 02004615A EP 1340843 B1 EP1340843 B1 EP 1340843B1
Authority
EP
European Patent Office
Prior art keywords
diffuser
filaments
depositing
air
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02004615A
Other languages
German (de)
French (fr)
Other versions
EP1340843A1 (en
Inventor
Hans-Georg Geus
Detlef Frey
Peter Dr. Schlag
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
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to EP02004615A priority Critical patent/EP1340843B1/en
Priority to DE50211394T priority patent/DE50211394D1/en
Priority to DK02004615T priority patent/DK1340843T3/en
Priority to SI200230653T priority patent/SI1340843T1/en
Priority to TR2003/02088T priority patent/TR200302088T3/en
Priority to ES02004615T priority patent/ES2207428T3/en
Priority to AT02004615T priority patent/ATE381630T1/en
Priority to CNB021217890A priority patent/CN100366810C/en
Priority to ARP030100611A priority patent/AR038608A1/en
Priority to MXPA03001723A priority patent/MXPA03001723A/en
Priority to IL154631A priority patent/IL154631A/en
Priority to CZ2003-581A priority patent/CZ305424B6/en
Priority to PL358929A priority patent/PL206768B1/en
Priority to RU2003105789/12A priority patent/RU2260083C2/en
Priority to MYPI20030688A priority patent/MY135631A/en
Priority to BRPI0300508-9A priority patent/BR0300508B1/en
Priority to CA002420520A priority patent/CA2420520C/en
Priority to JP2003050834A priority patent/JP3704522B2/en
Priority to KR1020030012229A priority patent/KR100920436B1/en
Priority to US10/375,892 priority patent/US6918750B2/en
Publication of EP1340843A1 publication Critical patent/EP1340843A1/en
Application granted granted Critical
Publication of EP1340843B1 publication Critical patent/EP1340843B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)

Definitions

  • the invention relates to a system for the continuous production of a spunbonded nonwoven web of aerodynamically stretched filaments made of thermoplastic material with a spinnerette, a cooling chamber, in the process air for cooling the filaments from an air supply cabin is inserted, a drawing unit with a Unterziehkanal.
  • process air refers to cooling air for cooling the filaments.
  • a known plant of the type mentioned ( DE 196 20 379 C2 ), from which the invention proceeds, has basically proven to produce a spunbonded web of aerodynamically drawn filaments.
  • the drafting unit is aerodynamically decoupled from a laying system that has a diffuser.
  • the Unterziehkanal is formed with respect to the gap thickness as the laying unit of the drafting aerodynamically decoupling barrier air shaft.
  • barrier duct means that during operation of the plant process air always exits the Unterziehkanal and enters the diffuser, but with a flow rate and a kinetic energy that prevents that pressure changes in the laying unit on the aerodynamic conditions in the Anblassystem or in the cooling chamber interfere with and vice versa. Therefore, in this system, the cooling process or blowing in the cooling chamber can be optimized without that this optimization interferes with the laying process and thus spunbonding disturbing. Conversely, the laying system can be optimized with regard to spunbonding without the turbulence system or cooling system being disturbed.
  • the arranged under the spinnerette cooling chamber of this system moreover, has a blowing fan, with which the process air is blown to cool the filaments to the filaments.
  • the invention addresses the technical problem of specifying a system of the type mentioned, with the higher filament speeds and increased Filamentfhen can be achieved and in which the problems described above can be effectively avoided.
  • the invention teaches a system for the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material with a Spinnerette, a cooling chamber, in the process air for cooling the filaments from an air supply cabin is inserted, a drawing unit with a Unterziehkanal, where the stretching unit connects a laying unit with at least one diffuser and with a depositing device for depositing the filaments to the spunbonded web, wherein the air supply booth arranged next to the cooling chamber is subdivided into at least two cabin sections, from each of which process air of different temperature can be supplied and wherein the connection between the cooling chamber and the stretching unit is closed to the outside and formed air-free.
  • the air supply cabin consists of at least two cabin sections arranged vertically one above the other. Conveniently, only two cabin sections are arranged vertically one above the other.
  • process air at a temperature between 15 ° C and 75 ° C, preferably between 18 ° C and 70 ° C fed from a first cabin section and is from a second cabin section process air with a temperature between 15 ° C and 38 ° C, preferably between 18 ° C and 35 ° C fed.
  • the first and the second cabin section are arranged vertically one above the other and the first cabin section forms the upper cabin section and the second cabin section forms the lower cabin section.
  • the air supplied from the upper cabin section has a higher temperature than the air supplied from the lower cabin section.
  • the air supplied from the upper cabin section may also have a lower temperature than the air supplied from the lower cabin section.
  • at least one fan for the supply of process air is connected to each cabin section.
  • the temperature of each cabin section can be controlled. It remains within the framework of Invention, that the volume flows of the individual cabin sections of the supplied air streams can be controlled. By adjusting the volume flow and the temperature, in particular the upper cabin section, the cooling of the filaments can be reduced so that higher filament speeds are possible and finer filaments can be spun.
  • the air supply cabin is usually referred to as Anblaskabine.
  • a targeted blowing of the filaments or the filament bundle takes place with air.
  • no blowing of the filaments or of the filament bundle takes place.
  • the process air is sucked in by the filaments or by the filament curtain.
  • the filament bundle sucks in the process air it needs.
  • the cooling chamber corresponds to a passive system in which a blowing of the filaments does not take place, but only a suction of process air from the cabin sections.
  • a boundary layer of air forms concentrically around the individual filaments, and due to the structure of these boundary layers, the filaments suck or the filament bundle sucks in the process air.
  • the boundary layers ensure a sufficient distance between the filaments.
  • the spinnerette of the plant has nozzle bores for the exit of the filaments.
  • the mutual distance of the nozzle bores of the spinnerette in the middle of the spinnerette is greater than in the outer areas.
  • the distance of the nozzle holes in the nozzle plate of the spinnerette thus increases from the outside to the middle.
  • the air supply cabin arranged at a distance from the nozzle plate of the spinnerette is and that the air supply cabin is conveniently located a few inches below the nozzle plate.
  • a monomer suction device is arranged between the nozzle plate and the air supply cabin. The monomer suction device sucks air from the filament forming space directly below the nozzle plate, thereby allowing the gases exiting the polymer filaments, such as monomers, oligomers, decomposition products, and the like, to be removed from the plant.
  • the air flow below the nozzle plate can be controlled, which otherwise might not be stationary because of the indifferent conditions.
  • the Monomerabsaugungsvorraum expediently has an exhaust chamber to which preferably at least one suction fan is connected.
  • the suction chamber has a first suction slot towards the filament-forming space in its lower region.
  • the suction chamber further has a second suction slot in its upper region. With the suction through this second suction slot is effectively achieved that disturbing turbulence in the area between the nozzle plate and the suction chamber can not form.
  • the extracted with the Monomerabsaugungsvortechnisch volumetric flow is adjustable.
  • an intermediate channel is arranged, which intermediate channel from the outlet of the cooling chamber to the inlet of the draw-down channel of the drawing unit in Vertical section converges wedge-shaped.
  • the intermediate channel to the entrance of the Unterziehkanals runs in a vertical section to the inlet width of the Unterziehkanals wedge-shaped together.
  • different pitch angles of the intermediate channel are adjustable.
  • the geometry of the intermediate channel is variable, so that the air velocity can be increased. In this way undesirable, occurring at high temperatures relaxations of the filaments can be avoided.
  • the invention is based on the finding that the abovementioned technical problem can be effectively solved and, in particular, the filament speed and the filament fineness can be surprisingly increased when the measures according to the invention are implemented. As a result, nonwovens are obtained with optically high quality.
  • the invention is further based on the finding that for this solution of the technical problem an aerodynamic decoupling of the cooling of the filaments from the drawing of the filaments is required and that this aerodynamic decoupling can be achieved by realizing the described inventive features.
  • Essential to the invention for this purpose is first the inventive design of the cooling chamber or the air supply cabin and the possibility of regulating various temperatures and flow rates of the supplied air. For aerodynamic decoupling but also contribute to the other above-described inventive measures.
  • the filament cooling functionally reliable from the filament drawing is decoupled or decoupled aerodynamically.
  • Aerodynamic decoupling here means that although pressure changes in the drafting unit have an effect on the conditions in the cooling chamber, this adjustment to the thread can largely be compensated for by the adjustment options in the split air feed.
  • a laying unit with at least one diffuser adjoins the drawing unit.
  • the laying unit or the diffuser is multi-stage, preferably formed in two stages.
  • the laying unit consists of a first diffuser and an adjoining second diffuser.
  • an ambient air inlet gap is provided between the first and second diffusers.
  • the opening angle a in a lower diverging region of the first diffuser is infinitely adjustable.
  • the diverging side walls of the first diffuser are pivotable.
  • This adjustability of the diverging sidewalls may be symmetric or asymmetrical with respect to the median plane of the first diffuser.
  • an ambient air inlet gap is provided at the beginning of the second diffuser. Due to the high exit pulse from the first diffuser stage, there is a suction of secondary air from the environment through the ambient air inlet gap.
  • the width of the ambient air inlet gap is adjustable.
  • the ambient air inlet gap can preferably be adjusted so that the volume flow of the sucked secondary air is up to 30% of the incoming volume flow of the process air.
  • the second diffuser is height adjustable and although preferably infinitely adjustable in height. As a result, the distance to the depositing device or to the Ablegesiebband can be varied. It should be emphasized that with the laying unit according to the invention from the two diffusers effective aerodynamic decoupling between filament formation area and storage area can be achieved.
  • the system according to the invention can have a laying unit without air guiding elements or without a diffuser. Then the filament-air mixture emerges from the drawing unit and, without the air-guiding elements, strikes the depositing device or the depositing screen belt directly.
  • the filaments are electrostatically influenced after exiting the stretching unit and are performed either by a static or dynamic field. The filaments are charged so that a mutual contact of the filaments is prevented. Conveniently, the filaments are then caused by a second electric field to a movement that has an optimal storage result.
  • the charge possibly still adhering to the filaments is, for example, derived from the filaments by means of a special conductive reject screen and / or suitable unloading devices.
  • the depositing device has a continuously moving Ablegesiebband for the spunbonded web and at least one provided under the Ablegesiebband suction device.
  • the at least one suction device is preferably designed as a suction fan. Appropriately, these are at least one controllable and / or controllable suction blower.
  • at least three Absaug Schemee are arranged one behind the other in the direction of movement of Ablegesiebbandes, wherein a Hauptabsaug Scheme is arranged in the storage area of the spunbonded web, wherein a first suction area in front of the storage area and wherein a second suction area is arranged after the storage area.
  • the first suction area is thus arranged in the production direction in front of the storage area or in front of the main suction area, and the second suction area is arranged downstream of the storage area or main suction area in the production direction.
  • the main suction region is expediently separated from the first suction region and from the second suction region by corresponding walls.
  • the walls of the Hauptabsaug Hoches are nozzle-like. It is within the scope of the invention that the suction speed in the main suction area is greater than the suction speeds in the first suction area and in the second suction area.
  • the filament speed and the filament fineness can be considerably increased in comparison with the system known from the prior art explained at the outset. It can thus higher filament rates and filaments with finer titers be achieved. A reduction of the titer to values well below 1 is easily possible.
  • the system according to the invention is suitable for a broad application in particular also for polyester filaments. With the system according to the invention very uniform homogeneous nonwovens can be produced, which are characterized by a visually high quality.
  • the figures show a plant for the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material.
  • the system has a spinnerette 1 and a cooling chamber 2 arranged below the spinnerette 1, into which process air for cooling the filaments can be inserted.
  • To the cooling chamber 2 includes an intermediate channel 3. After this Intermediate channel 3 follows a stretching unit 4 with a Unterziehkanal 5.
  • At the lower channel 5 includes a laying unit 6 at. Below the laying unit 6, a laying device in the form of a continuously moving Ablegesiebbandes 7 is provided for storing the filaments to the spunbonded web.
  • the air supply cabin 8 is subdivided in the exemplary embodiment into an upper cabin section 8a and a lower cabin section 8b. From the two cabin sections 8a, 8b process air of different temperature can be supplied. Expediently and in the exemplary embodiment, process air having a temperature between 18 ° C. and 70 ° C. enters the cooling chamber from the upper cabin section 8 a. Preferably, process air having a temperature between 18 ° C. and 35 ° C. enters the cooling chamber 2 from the lower cabin section 8b.
  • the process air emerging from the upper cabin section 8a preferably has a higher temperature than the process air exiting from the lower cabin section 8b.
  • the process air emerging from the upper cabin section 8a may also have a lower temperature than the process air exiting from the lower cabin section 8b.
  • the process air is sucked in by the filaments emerging from the spinnerette 1 and not shown.
  • a fan 9a, 9b for supplying process air is connected to the cabin sections 8a, 8b in each case.
  • the volume flows of the supplied process air can be regulated.
  • the temperature of the process air entering the upper cabin section 8a or the lower cabin section 8b can also be regulated.
  • the cabin sections 8a, 8b are arranged both to the right and to the left of the cooling chamber 2.
  • a monomer extraction device 27 is arranged between the nozzle plate 10 of the spinnerette 1 and the air supply cabin 8, with which disruptive gases occurring during the spinning process can be removed from the system.
  • the monomer suction device 27 has an extraction chamber 28 and a suction fan 29 connected to the extraction chamber 28.
  • a first suction slot 30 is provided in the lower region of the suction chamber 28.
  • a second suction slot 31 is additionally arranged in the upper region of the suction chamber 28.
  • the second suction slot 31 is made narrower than the first suction slot 30. With the additional second suction slot 31 disturbing turbulence between the nozzle plate 10 and the monomer extraction device 27 are avoided according to the invention.
  • Fig. 1 it can be seen that the intermediate channel 3 from the outlet of the cooling chamber 2 to the inlet of the Unterziehkanals 5 of the stretching unit 4 in a vertical section converges wedge-shaped and that expediently and in the embodiment of the inlet width of the Unterziehkanals 5.
  • different pitch angle of the intermediate channel 3 are adjustable.
  • the lower channel 5 runs in a wedge shape in vertical section in the direction of the laying unit 6. It is within the scope of the invention that the channel width of the Unterziehkanals 5 is adjustable.
  • the laying unit 6 consists of a first diffuser 13 and an adjoining second diffuser 14 and that an ambient air inlet gap 15 is provided between the first diffuser 13 and the second diffuser 14.
  • Fig. 3 shows that each diffuser 13, 14 has an upper converging part and a lower diverging part. Consequently, each diffuser 13, 14 has a narrowest point between the upper converging part and the lower diverging part.
  • the first diffuser 13 has a divergent region 32, the side walls 16, 17 are flap-like adjustable.
  • an opening angle ⁇ of the diverging region 32 can be adjusted.
  • This opening angle ⁇ is expediently between 0.5 and 3 ° and is preferably 1 ° or about 1 °.
  • the opening angle ⁇ is preferably stepless adjustable.
  • the adjustment of the side walls 16, 17 can be done both symmetrically and asymmetrically to the center plane M.
  • the second diffuser 14 secondary air is sucked in according to the injector principle by the ambient air inlet gap 15. Due to the high exit pulse of the process air from the first diffuser 13, the secondary air is sucked in from the environment via this ambient air inlet gap 15.
  • the width of the ambient air inlet gap 15 is expediently and in the embodiment adjustable.
  • the opening angle ⁇ of the second diffuser 14 is preferably continuously adjustable.
  • the second diffuser 14 is adjustable in height. In this way, the distance a of the second diffuser 14 to the Ablegesiebband 7 can be adjusted.
  • the width of the ambient air inlet gap 15 can be adjusted. It is within the scope of the invention that the ambient air inlet gap 15 is set so that a tangential inflow of the secondary air takes place.
  • the distance s 2 between the median plane M and a side wall 16, 17 of the first diffuser 13 is expediently 0.8 s 1 to 2.5 s 1 (s 1 corresponds to the distance of the median plane M to the side wall at the narrowest point of the first diffuser 13).
  • the distance s 3 of the median plane M to the side wall at the narrowest point of second diffuser 14 is preferably 0.5 s 2 to 2 s 2 .
  • the distance s 4 of the median plane M to the lower edge of the side wall of the second diffuser 14 is 1 s 2 to 10 s 2 .
  • the length L 2 has a value of 1 s 2 to 15 s 2 . For the width of the ambient air inlet gap 15 different variable values are possible.
  • the aggregate of cooling chamber 2, intermediate channel 3, drawing unit 4 and laying unit 6, apart from the air intake in the cooling chamber 2 and the air inlet at the ambient air inlet gap 15 forms a closed system.
  • Fig. 4 shows a continuously moving Ablegesiebband 7 for the spunbonded nonwoven web, not shown.
  • three suction regions 18, 19, 20 are arranged one behind the other in the direction of movement of the discharge screen belt 7.
  • a Hauptabsaug Colour 19 is provided in the storage area of the spunbonded web.
  • a first suction area 18 is arranged in front of the storage area or in front of the main suction area 19.
  • a second suction region 20 is connected downstream of the main suction region 19.
  • each suction area 18, 19, 20 can be assigned a separate suction fan.
  • only a suction fan is provided and that the respective suction conditions in the suction areas 18, 19, 20 are adjusted by means of adjusting and throttle bodies.
  • the first suction region 18 is bounded by the walls 21 and 22.
  • the second suction region 20 is bounded by the walls 23 and 24.
  • the walls 22, 23 of the Hauptabsaug Schemees 19th form preferably and in the embodiment, a nozzle contour.
  • the suction speed in Hauptabsaug Scheme 19 is advantageously higher than the suction speeds in the first suction 18 and the second suction 20. It is within the scope of the invention that the suction power in the Feldabsaug Scheme 19 regardless of the suction in the first suction 18 and the second suction 20 controlled / or regulated.
  • the task of the first suction area 18 is to remove the quantities of air supplied with the discharge screen belt 7 and to align the flow vectors at the border to the main suction area 19 orthogonally with respect to the discharge screen belt 7.
  • the first suction area 18 serves to keep filaments already stored here reliably on the reject screen belt 7.
  • the Hauptabsaug Colour 19 entrained with the filaments air can flow freely, so that the spunbonded can be stored reliable.
  • at least part of the second suction region 20 in the transport direction of the Ablegesiebbandes 7 in front of the pressure roller pair 33 is arranged.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Description

Die Erfindung betrifft eine Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff mit einer Spinnerette, einer Kühlkammer, in die Prozessluft zur Kühlung der Filamente aus einer Luftzufuhrkabine einführbar ist, einer Verstreckeinheit mit einem Unterziehkanal. - Der Ausdruck Prozessluft bezeichnet Kühlluft zur Kühlung der Filamente.The invention relates to a system for the continuous production of a spunbonded nonwoven web of aerodynamically stretched filaments made of thermoplastic material with a spinnerette, a cooling chamber, in the process air for cooling the filaments from an air supply cabin is inserted, a drawing unit with a Unterziehkanal. - The term process air refers to cooling air for cooling the filaments.

Verfahren und Vorrichtungen zur Filamenterzeugung sind aus der Praxis allgemein bekannt. Aus EP 0 334 604 A ist ein Verfahren bekannt, bei dem Filamente nach dem Austritt aus einem Spinnkopf gekühlt werden. Nach dem Kühlen werden die Filamente unmittelbar über Galetten geführt. DE 39 29 961 C1 betrifft eine Vorrichtung für die Erzeugung von zwei Fadenscharen aus Filamenten zur Herstellung von Spinnvliesen. Unmittelbar unterhalb eines Verteilerdoms, aus dem die Filamente bei der Herstellung austreten, werden Monomere abgesaugt. Im daran angrenzenden Abschnitt der Vorrichtung nach DE 39 29 961 C1 erfolgt die Kühlung der Filamente.Filament production methods and apparatus are well known in the art. Out EP 0 334 604 A For example, a method is known in which filaments are cooled after leaving a spinning head. After cooling, the filaments are passed directly over godets. DE 39 29 961 C1 relates to a device for the production of two filament bundles of filaments for the production of spunbonded nonwovens. Immediately below a distributor dome from which the filaments emerge during production, monomers are aspirated. In the adjacent section of the device according to DE 39 29 961 C1 the cooling of the filaments takes place.

Eine bekannte Anlage der eingangs genannten Art ( DE 196 20 379 C2 ), von der die Erfindung ausgeht, hat sich grundsätzlich zur Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten bewährt. Bei dieser Anlage wird die Verstreckeinheit aerodynamisch entkoppelt von einem Verlegesystem, das einen Diffusor aufweist. Hier findet eine saubere funktionelle Trennung zwischen der Verstreckeinheit und der Verlegeeinheit statt. Dazu ist der Unterziehkanal in Bezug auf die Spaltdicke als die Verlegeeinheit von der Verstreckeinheit aerodynamisch abkoppelnder Sperrluftschacht ausgebildet. Der Begriff Sperrluftschacht besagt, dass beim Betrieb der Anlage stets Prozessluft aus dem Unterziehkanal austritt und in den Diffusor eintritt, jedoch mit einem Mengenstrom und einer kinetischen Energie, die verhindert, dass sich Druckänderungen in der Verlegeeinheit auf die aerodynamischen Verhältnisse im Anblassystem bzw. in der Kühlkammer störend auswirken und umgekehrt. Deshalb kann bei dieser Anlage der Kühlvorgang bzw. Anblasvorgang in der Kühlkammer optimiert werden, ohne dass diese Optimierung den Verlegevorgang und damit die Spinnvliesbildung störend beeinträchtigt. Umgekehrt kann das Verlegesystem in Bezug auf die Spinnvliesbildung optimiert werden, ohne dass das Anblassystem bzw. Kühlsystem Störungen erfährt. Die unter der Spinnerette angeordnete Kühlkammer dieser Anlage weist im Übrigen ein Anblasgebläse auf, mit dem die Prozessluft zur Kühlung der Filamente an die Filamente angeblasen wird. - Wenn die Filamentgeschwindigkeit und die Filamentfeinheit gesteigert werden soll (z.B. Verringerung des Titers auf Werte deutlich unter 1), stößt man jedoch an die Grenzen dieser bekannten Anlage. Der bei dieser Anlage durchgeführte Anblasvorgang ist für höhere Durchsätze nicht geeignet, weil es zu Problemen bei der Filamentbildung kommt. Eine resultierende Eigenbewegung der Filamente führt dazu, dass sich die Filamente aufeinander zu bewegen und deshalb nur als Filamentbündel abgelegt werden können. Wenn bei der bekannten Anlage die Luftgeschwindigkeit zur Steigerung der Filamentgeschwindigkeit erhöht wird, führt dies zu einer Intensivierung der Kühlung der Filamente. Diese intensive Kühlung bedingt ein frühzeitiges Einfrieren der Filamente und somit eine Limitierung für die Filamentgeschwindigkeit bzw. für die Filamentfeinheit.A known plant of the type mentioned ( DE 196 20 379 C2 ), from which the invention proceeds, has basically proven to produce a spunbonded web of aerodynamically drawn filaments. In this system, the drafting unit is aerodynamically decoupled from a laying system that has a diffuser. Here is a clean functional separation between the drawing unit and the laying unit instead. For this purpose, the Unterziehkanal is formed with respect to the gap thickness as the laying unit of the drafting aerodynamically decoupling barrier air shaft. The term barrier duct means that during operation of the plant process air always exits the Unterziehkanal and enters the diffuser, but with a flow rate and a kinetic energy that prevents that pressure changes in the laying unit on the aerodynamic conditions in the Anblassystem or in the cooling chamber interfere with and vice versa. Therefore, in this system, the cooling process or blowing in the cooling chamber can be optimized without that this optimization interferes with the laying process and thus spunbonding disturbing. Conversely, the laying system can be optimized with regard to spunbonding without the turbulence system or cooling system being disturbed. The arranged under the spinnerette cooling chamber of this system, moreover, has a blowing fan, with which the process air is blown to cool the filaments to the filaments. - If the filament speed and the filament fineness to be increased (eg reduction of the titer to values well below 1), but you come up against the limits of this known system. The blowing process performed on this equipment is not suitable for higher throughputs because of problems with filament formation. A resulting proper movement of the filaments causes the filaments to move towards each other and therefore can only be deposited as a filament bundle. If the air speed for increasing the filament speed is increased in the known system, this leads to an intensification of the cooling of the filaments. This intensive cooling requires an early freezing of the filaments and thus a limitation for the filament speed or for the filament fineness.

Demgegenüber liegt der Erfindung das technische Problem zugrunde, eine Anlage der eingangs genannten Art anzugeben, mit der höhere Filamentgeschwindigkeiten und gesteigerte Filamentfeinheiten erreicht werden können und bei der die vorstehend beschriebenen Probleme effektiv vermieden werden können.In contrast, the invention addresses the technical problem of specifying a system of the type mentioned, with the higher filament speeds and increased Filamentfeinheiten can be achieved and in which the problems described above can be effectively avoided.

Zur Lösung dieses technischen Problems lehrt die Erfindung eine Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff mit einer Spinnerette, einer Kühlkammer, in die Prozessluft zur Kühlung der Filamente aus einer Luftzufuhrkabine einführbar ist, einer Verstreckeinheit mit einem Unterziehkanal, wobei an die Verstreckeinheit eine Verlegeeinheit mit zumindest einem Diffusor anschließt und mit einer Ablegeeinrichtung zur Ablage der Filamente zur Spinnvliesbahn, wobei die neben der Kühlkammer angeordnete Luftzufuhrkabine in zumindest zwei Kabinenabschnitte unterteilt ist, aus denen jeweils Prozessluft unterschiedlicher Temperatur zuführbar ist und wobei die Verbindung zwischen der Kühlkammer und der Verstreckeinheit nach außen geschlossen und luftzuführungsfrei ausgebildet ist. - Es liegt im Rahmen der Erfindung, dass die Luftzufuhrkabine aus zumindest zwei vertikal übereinander angeordneten Kabinenabschnitten besteht. Zweckmäßigerweise sind lediglich zwei Kabinenabschnitte vertikal übereinander angeordnet. - Nach sehr bevorzugter Ausführungsform der Erfindung ist aus einem ersten Kabinenabschnitt Prozessluft mit einer Temperatur zwischen 15 °C und 75 °C, vorzugsweise zwischen 18 °C und 70 °C zuführbar und ist aus einem zweiten Kabinenabschnitt Prozessluft mit einer Temperatur zwischen 15 °C und 38 °C, vorzugsweise zwischen 18 °C und 35 °C zuführbar. Zweckmäßigerweise sind der erste und der zweite Kabinenabschnitt vertikal übereinander angeordnet und der erste Kabinenabschnitt bildet dabei den oberen Kabinenabschnitt und der zweite Kabinenabschnitt bildet den unteren Kabinenabschnitt. Es liegt im Rahmen der Erfindung, dass die aus dem oberen Kabinenabschnitt zugeführte Luft eine höhere Temperatur als die aus dem unteren Kabinenabschnitt zugeführte Luft aufweist. Grundsätzlich kann aber auch die aus dem oberen Kabinenabschnitt zugeführte Luft eine niedrigere Temperatur als die aus dem unteren Kabinenabschnitt zugeführte Luft aufweisen. Vorzugsweise ist an jeden Kabinenabschnitt zumindest ein Gebläse für die Zufuhr von Prozessluft angeschlossen. Es liegt im Rahmen der Erfindung, dass die Temperatur jedes Kabinenabschnittes geregelt werden kann. Es liegt weiterhin im Rahmen der Erfindung, dass die Volumenströme den einzelnen Kabinenabschnitten der zugeführten Luftströme geregelt werden können. Durch die Einstellung des Volumenstromes und der Temperatur insbesondere des oberen Kabinenabschnittes kann die Kühlung der Filamente so verringert werden, dass höhere Filamentgeschwindigkeiten möglich sind und feinere Filamente gesponnen werden können.To solve this technical problem, the invention teaches a system for the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material with a Spinnerette, a cooling chamber, in the process air for cooling the filaments from an air supply cabin is inserted, a drawing unit with a Unterziehkanal, where the stretching unit connects a laying unit with at least one diffuser and with a depositing device for depositing the filaments to the spunbonded web, wherein the air supply booth arranged next to the cooling chamber is subdivided into at least two cabin sections, from each of which process air of different temperature can be supplied and wherein the connection between the cooling chamber and the stretching unit is closed to the outside and formed air-free. It is within the scope of the invention that the air supply cabin consists of at least two cabin sections arranged vertically one above the other. Conveniently, only two cabin sections are arranged vertically one above the other. - According to a very preferred embodiment of the invention, process air at a temperature between 15 ° C and 75 ° C, preferably between 18 ° C and 70 ° C fed from a first cabin section and is from a second cabin section process air with a temperature between 15 ° C and 38 ° C, preferably between 18 ° C and 35 ° C fed. Conveniently, the first and the second cabin section are arranged vertically one above the other and the first cabin section forms the upper cabin section and the second cabin section forms the lower cabin section. It is within the scope of the invention that the air supplied from the upper cabin section has a higher temperature than the air supplied from the lower cabin section. In principle, however, the air supplied from the upper cabin section may also have a lower temperature than the air supplied from the lower cabin section. Preferably, at least one fan for the supply of process air is connected to each cabin section. It is within the scope of the invention that the temperature of each cabin section can be controlled. It remains within the framework of Invention, that the volume flows of the individual cabin sections of the supplied air streams can be controlled. By adjusting the volume flow and the temperature, in particular the upper cabin section, the cooling of the filaments can be reduced so that higher filament speeds are possible and finer filaments can be spun.

Bei aus dem Stand der Technik bekannten Anlagen wird die Luftzufuhrkabine üblicherweise als Anblaskabine bezeichnet. Bei diesen Anlagen findet ein gezieltes Anblasen der Filamente bzw. des Filamentbündels mit Luft statt. Es liegt im Rahmen der Erfindung, dass bei der erfindungsgemäßen Anlage kein Anblasen der Filamente bzw. des Filamentbündels stattfindet. Vielmehr wird die Prozessluft von den Filamenten bzw. von dem Filamentvorhang angesaugt. Mit anderen Worten saugt das Filamentbündel die Prozessluft an, die es braucht. Es liegt somit im Rahmen der Erfindung, dass die Kühlkammer einem passiven System entspricht, bei dem ein Anblasen der Filamente nicht stattfindet, sondern lediglich ein Ansaugen von Prozessluft aus den Kabinenabschnitten erfolgt. Um die einzelnen Filamente bildet sich jeweils konzentrisch eine Grenzschicht aus Luft auf und aufgrund des Aufbaus dieser Grenzschichten saugen die Filamente bzw. saugt das Filamentbündel die Prozessluft an. Die Grenzschichten gewährleisten einen ausreichenden Abstand der Filamente zueinander. Indem auf eine aktive Anblasung verzichtet wird, kann wirksam dazu beigetragen werden, dass die Filamente keine Möglichkeiten zu störenden Auslenkungen haben und keine störenden Relativbewegungen der Filamente zueinander stattfinden. - Zwischen der Kühlkammer und den Kabinenabschnitten sind zweckmäßigerweise Wabengleichrichter vorgesehen.In systems known from the prior art, the air supply cabin is usually referred to as Anblaskabine. In these systems, a targeted blowing of the filaments or the filament bundle takes place with air. It is within the scope of the invention that in the inventive system no blowing of the filaments or of the filament bundle takes place. Rather, the process air is sucked in by the filaments or by the filament curtain. In other words, the filament bundle sucks in the process air it needs. It is therefore within the scope of the invention that the cooling chamber corresponds to a passive system in which a blowing of the filaments does not take place, but only a suction of process air from the cabin sections. A boundary layer of air forms concentrically around the individual filaments, and due to the structure of these boundary layers, the filaments suck or the filament bundle sucks in the process air. The boundary layers ensure a sufficient distance between the filaments. By dispensing with active blowing, it is possible to make an effective contribution to ensuring that the filaments have no possibility of disturbing deflections and that there are no disturbing relative movements of the filaments relative to one another. - Between the cooling chamber and the Cabin sections are expediently provided honeycomb rectifier.

Aufgrund der erfindungsgemäßen Ausbildung der Kühlkammer bzw. der Unterteilung der Luftzufuhrkabine in Kabinenabschnitte und durch die Möglichkeit, Luftströme verschiedener Temperaturen bzw. verschiedener Volumenströme zuzuführen, kann eine effektive Trennung bzw. Entkopplung des Bereichs "Spinnen, Kühlung" von dem Bereich "Verstreckung, Unterziehung" erreicht werden. Mit anderen Worten können die Einflüsse, die Druckänderungen in der Verstreckeinheit auf die Bedingungen in der Kühlkammer haben, durch die erfindungsgemäßen Maßnahmen weitgehend kompensiert werden. Diese aerodynamische Entkopplung wird auch durch weitere nachfolgend behandelte erfindungsgemäße Merkmale unterstützt bzw. gefördert.Due to the design according to the invention of the cooling chamber or the subdivision of the air supply cabin into cabin sections and the possibility of supplying air flows of different temperatures or different volume flows, an effective separation or decoupling of the area "spinning, cooling" from the area "drawing, drawing" be achieved. In other words, the influences which pressure changes in the drawing unit have on the conditions in the cooling chamber can be largely compensated by the measures according to the invention. This aerodynamic decoupling is also supported or promoted by further features according to the invention which are treated below.

Die Spinnerette der Anlage weist Düsenbohrungen für den Austritt der Filamente auf. Nach sehr bevorzugter Ausführungsform, der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, ist der gegenseitige Abstand der Düsenbohrungen der Spinnerette in der Mitte der Spinnerette größer als in den Außenbereichen. Der Abstand der Düsenbohrungen in der Düsenplatte der Spinnerette vergrößert sich also von außen zur Mitte hin. Durch diese Anordnung der Düsenbohrungen kann sehr wirksam ein ausreichender Mindestabstand zwischen den Filamenten gewährleistet werden.The spinnerette of the plant has nozzle bores for the exit of the filaments. According to a very preferred embodiment, which is of very particular importance in the context of the invention, the mutual distance of the nozzle bores of the spinnerette in the middle of the spinnerette is greater than in the outer areas. The distance of the nozzle holes in the nozzle plate of the spinnerette thus increases from the outside to the middle. By this arrangement, the nozzle holes can be ensured very effective sufficient minimum distance between the filaments.

Es liegt im Rahmen der Erfindung, dass die Luftzufuhrkabine mit Abstand zu der Düsenplatte der Spinnerette angeordnet ist und dass die Luftzufuhrkabine zweckmäßigerweise einige Zentimeter unterhalb der Düsenplatte angeordnet ist. Nach sehr bevorzugter Ausführungsform der Erfindung ist zwischen der Düsenplatte und der Luftzufuhrkabine eine Monomerabsaugungsvorrichtung angeordnet. Die Monomerabsaugungsvorrichtung saugt Luft aus dem Filamentbildungsraum direkt unterhalb der Düsenplatte ab, wodurch erreicht wird, dass die neben den Polymerfilamenten austretenden Gase wie Monomere, Oligomere, Zersetzungsprodukte und dergleichen aus der Anlage entfernt werden können. Im Übrigen kann mit der Monomerabsaugungsvorrichtung die Luftströmung unterhalb der Düsenplatte kontrolliert werden, die sonst wegen der indifferenten Verhältnisse nicht stationär sein könnte. Die Monomerabsaugungsvorrichtung weist zweckmäßigerweise eine Absaugungskammer auf, an die bevorzugt zumindest ein Absaugungsgebläse angeschlossen ist. Vorzugsweise weist die Absaugungskammer zum Filamentbildungsraum hin in ihrem unteren Bereich einen ersten Absaugungsschlitz auf. Nach sehr bevorzugter Ausführungsform weist die Absaugungskammer fernerhin in ihrem oberen Bereich einen zweiten Absaugungsschlitz auf. Mit der Absaugung durch diesen zweiten Absaugungsschlitz wird effektiv erreicht, dass sich störende Turbulenzen im Bereich zwischen der Düsenplatte und der Absaugungskammer nicht bilden können. Zweckmäßigerweise ist der mit der Monomerabsaugungsvorrichtung abgesaugte Volumenstrom regelbar.It is within the scope of the invention that the air supply cabin arranged at a distance from the nozzle plate of the spinnerette is and that the air supply cabin is conveniently located a few inches below the nozzle plate. According to a very preferred embodiment of the invention, a monomer suction device is arranged between the nozzle plate and the air supply cabin. The monomer suction device sucks air from the filament forming space directly below the nozzle plate, thereby allowing the gases exiting the polymer filaments, such as monomers, oligomers, decomposition products, and the like, to be removed from the plant. Incidentally, with the monomer suction device, the air flow below the nozzle plate can be controlled, which otherwise might not be stationary because of the indifferent conditions. The Monomerabsaugungsvorrichtung expediently has an exhaust chamber to which preferably at least one suction fan is connected. Preferably, the suction chamber has a first suction slot towards the filament-forming space in its lower region. According to a very preferred embodiment, the suction chamber further has a second suction slot in its upper region. With the suction through this second suction slot is effectively achieved that disturbing turbulence in the area between the nozzle plate and the suction chamber can not form. Conveniently, the extracted with the Monomerabsaugungsvorrichtung volumetric flow is adjustable.

Es liegt im Rahmen der Erfindung, dass zwischen der Kühlkammer und der Verstreckeinheit ein Zwischenkanal angeordnet ist, welcher Zwischenkanal vom Austritt der Kühlkammer zum Eintritt des Unterziehkanals der Verstreckeinheit im Vertikalschnitt keilförmig zusammenläuft. Zweckmäßigerweise läuft der Zwischenkanal zum Eintritt des Unterziehkanals im Vertikalschnitt auf die Eintrittsbreite des Unterziehkanals keilförmig zusammen. Vorzugsweise sind unterschiedliche Steigungswinkel des Zwischenkanals einstellbar. Es liegt im Rahmen der Erfindung, dass die Geometrie des Zwischenkanals veränderbar ist, damit die Luftgeschwindigkeit erhöht werden kann. Auf diese Weise können unerwünschte, bei hohen Temperaturen auftretende Relaxationen der Filamente vermieden werden.It is within the scope of the invention that between the cooling chamber and the stretching unit, an intermediate channel is arranged, which intermediate channel from the outlet of the cooling chamber to the inlet of the draw-down channel of the drawing unit in Vertical section converges wedge-shaped. Conveniently, the intermediate channel to the entrance of the Unterziehkanals runs in a vertical section to the inlet width of the Unterziehkanals wedge-shaped together. Preferably, different pitch angles of the intermediate channel are adjustable. It is within the scope of the invention that the geometry of the intermediate channel is variable, so that the air velocity can be increased. In this way undesirable, occurring at high temperatures relaxations of the filaments can be avoided.

Der Erfindung liegt die Erkenntnis zugrunde, dass das oben genannte technische Problem effektiv gelöst werden kann und insbesondere die Filamentgeschwindigkeit und die Filamentfeinheit überraschend gesteigert werden können, wenn die erfindungsgemäßen Maßnahmen verwirklicht werden. Im Ergebnis werden Vliese mit optisch hoher Qualität erhalten. Der Erfindung liegt weiterhin die Erkenntnis zugrunde, dass für diese Lösung des technischen Problems eine aerodynamische Entkopplung der Kühlung der Filamente von der Verstreckung der Filamente erforderlich ist und dass diese aerodynamische Entkopplung durch Verwirklichung der beschriebenen erfindungsgemäßen Merkmale erreicht werden kann. Erfindungswesentlich ist hierfür zunächst die erfindungsgemäße Ausbildung der Kühlkammer bzw. der Luftzufuhrkabine sowie die Möglichkeit der Regelung verschiedener Temperaturen und Volumenströme der zugeführten Luft. Zur aerodynamischen Entkopplung tragen aber auch die weiteren vorstehend erläuterten erfindungsgemäßen Maßnahmen bei. Im Rahmen der Erfindung wird erreicht, dass die Filamentkühlung funktionssicher von der Filamentverstreckung entkoppelt wird bzw. aerodynamisch entkoppelt wird. Aerodynamische Entkopplung meint hier, dass sich Druckänderungen in der Verstreckeinheit zwar auf die Bedingungen in der Kühlkammer auswirken, dass jedoch durch die Einstellmöglichkeiten in der geteilten Luftzuführung diese Beeinflussung auf den Faden weitgehend kompensiert werden kann.The invention is based on the finding that the abovementioned technical problem can be effectively solved and, in particular, the filament speed and the filament fineness can be surprisingly increased when the measures according to the invention are implemented. As a result, nonwovens are obtained with optically high quality. The invention is further based on the finding that for this solution of the technical problem an aerodynamic decoupling of the cooling of the filaments from the drawing of the filaments is required and that this aerodynamic decoupling can be achieved by realizing the described inventive features. Essential to the invention for this purpose is first the inventive design of the cooling chamber or the air supply cabin and the possibility of regulating various temperatures and flow rates of the supplied air. For aerodynamic decoupling but also contribute to the other above-described inventive measures. In the context of the invention it is achieved that the filament cooling functionally reliable from the filament drawing is decoupled or decoupled aerodynamically. Aerodynamic decoupling here means that although pressure changes in the drafting unit have an effect on the conditions in the cooling chamber, this adjustment to the thread can largely be compensated for by the adjustment options in the split air feed.

Erfindungsgemäß schließt an die Verstreckeinheit eine Verlegeeinheit mit zumindest einem Diffusor an. Vorzugsweise ist die Verlegeeinheit bzw. der Diffusor mehrstufig, bevorzugt zweistufig ausgebildet. Nach sehr bevorzugter Ausführungsform der Erfindung besteht die Verlegeeinheit aus einem ersten Diffusor und einem daran anschließenden zweiten Diffusor. Vorzugsweise ist zwischen dem ersten und dem zweiten Diffusor ein Umgebungslufteintrittsspalt vorgesehen. In dem ersten Diffusor kommt es zu einer Reduzierung der zur Verstreckung der Filamente notwendigen hohen Luftgeschwindigkeit am Ende des Unterziehkanals. Daraus resultiert ein deutlicher Druckrückgewinn. Vorzugsweise ist der Öffnungswinkel a in einem unteren divergierenden Bereich des ersten Diffusors stufenlos verstellbar. Dazu sind die divergierenden Seitenwände des ersten Diffusors verschwenkbar. Diese Verstellbarkeit der divergierenden Seitenwände kann in Bezug auf die Mittelebene des ersten Diffusors symmetrisch oder asymmetrisch erfolgen. Am Anfang des zweiten Diffusors ist ein Umgebungslufteintrittsspalt vorgesehen. Aufgrund des hohen Austrittsimpulses aus der ersten Diffusorstufe kommt es zu einem Ansaugen von Sekundärluft aus der Umgebung durch den Umgebungslufteintrittsspalt. Vorzugsweise ist die Weite des Umgebungslufteintrittsspaltes einstellbar. Dabei kann der Umgebungslufteintrittsspalt bevorzugt so eingestellt werden, dass der Volumenstrom der angesaugten Sekundärluft bis zu 30% des eintretenden Volumenstromes der Prozessluft beträgt. Zweckmäßigerweise ist der zweite Diffusor höhenverstellbar und zwar bevorzugt stufenlos höhenverstellbar. Dadurch kann der Abstand zur Ablegeeinrichtung bzw. zum Ablegesiebband variiert werden. Hervorzuheben ist, dass mit der erfindungsgemäßen Verlegeeinheit aus den beiden Diffusoren eine effektive aerodynamische Entkopplung zwischen Filamentbildungsbereich und Ablagebereich erzielt werden kann.According to the invention, a laying unit with at least one diffuser adjoins the drawing unit. Preferably, the laying unit or the diffuser is multi-stage, preferably formed in two stages. According to a very preferred embodiment of the invention, the laying unit consists of a first diffuser and an adjoining second diffuser. Preferably, an ambient air inlet gap is provided between the first and second diffusers. In the first diffuser, there is a reduction in the high air velocity necessary for drawing the filaments at the end of the lower draw channel. This results in a significant pressure recovery. Preferably, the opening angle a in a lower diverging region of the first diffuser is infinitely adjustable. For this purpose, the diverging side walls of the first diffuser are pivotable. This adjustability of the diverging sidewalls may be symmetric or asymmetrical with respect to the median plane of the first diffuser. At the beginning of the second diffuser an ambient air inlet gap is provided. Due to the high exit pulse from the first diffuser stage, there is a suction of secondary air from the environment through the ambient air inlet gap. Preferably, the width of the ambient air inlet gap is adjustable. there the ambient air inlet gap can preferably be adjusted so that the volume flow of the sucked secondary air is up to 30% of the incoming volume flow of the process air. Conveniently, the second diffuser is height adjustable and although preferably infinitely adjustable in height. As a result, the distance to the depositing device or to the Ablegesiebband can be varied. It should be emphasized that with the laying unit according to the invention from the two diffusers effective aerodynamic decoupling between filament formation area and storage area can be achieved.

Grundsätzlich liegt es auch im Rahmen der Erfindung, dass die erfindungsgemäße Anlage eine Verlegeeinheit ohne Luftleitorgane bzw. ohne Diffusor aufweisen kann. Dann tritt das Filament-Luft-Gemisch aus der Verstreckeinheit aus und trifft ohne Luftleitorgane unmittelbar auf die Ablegeeinrichtung bzw. auf das Ablegesiebband. - Weiterhin liegt es auch im Rahmen der Erfindung, dass die Filamente nach dem Austritt aus der Verstreckeinheit elektrostatisch beeinflusst werden und dazu entweder durch ein statisches oder dynamisches Feld geführt werden. Dabei werden die Filamente so aufgeladen, dass eine gegenseitige Berührung der Filamente verhindert wird. Zweckmäßigerweise werden die Filamente dann durch ein zweites elektrisches Feld zu einer Bewegung veranlasst, die eine optimale Ablage zur Folge hat. Die dann eventuell noch an den Filamenten anhaftende Ladung wird beispielsweise durch ein spezielles leitfähiges Ablegesiebband und/oder durch geeignete Entladeeinrichtungen von den Filamenten abgeleitet.In principle, it is also within the scope of the invention that the system according to the invention can have a laying unit without air guiding elements or without a diffuser. Then the filament-air mixture emerges from the drawing unit and, without the air-guiding elements, strikes the depositing device or the depositing screen belt directly. - Furthermore, it is also within the scope of the invention that the filaments are electrostatically influenced after exiting the stretching unit and are performed either by a static or dynamic field. The filaments are charged so that a mutual contact of the filaments is prevented. Conveniently, the filaments are then caused by a second electric field to a movement that has an optimal storage result. The charge possibly still adhering to the filaments is, for example, derived from the filaments by means of a special conductive reject screen and / or suitable unloading devices.

Es liegt im Rahmen der Erfindung, dass die Ablegeeinrichtung ein kontinuierlich bewegtes Ablegesiebband für die Spinnvliesbahn aufweist und zumindest eine unter dem Ablegesiebband vorgesehene Saugeinrichtung. Die zumindest eine Saugeinrichtung ist vorzugsweise als Sauggebläse ausgebildet. Zweckmäßigerweise handelt es sich dabei um zumindest ein steuer- und/oder regelbares Sauggebläse. - Nach sehr bevorzugter Ausführungsform der Erfindung sind in Bewegungsrichtung des Ablegesiebbandes zumindest drei Absaugbereiche hintereinander angeordnet, wobei ein Hauptabsaugbereich im Ablagebereich der Spinnvliesbahn angeordnet ist, wobei ein erster Saugbereich vor dem Ablagebereich und wobei ein zweiter Saugbereich nach dem Ablagebereich angeordnet ist. Der erste Saugbereich ist also in Produktionsrichtung vor dem Ablagebereich bzw. vor dem Hauptabsaugbereich angeordnet und der zweite Saugbereich ist dem Ablagebereich bzw. Hauptabsaugbereich in Produktionsrichtung nachgeordnet. Zweckmäßigerweise wird der Hauptabsaugbereich von dem ersten Saugbereich und von dem zweiten Saugbereich durch entsprechende Wandungen getrennt. Vorzugsweise sind die Wandungen des Hauptabsaugbereiches düsenartig ausgebildet. Es liegt im Rahmen der Erfindung, dass die Sauggeschwindigkeit im Hauptabsaugbereich größer ist als die Sauggeschwindigkeiten im ersten Saugbereich und im zweiten Saugbereich.It is within the scope of the invention that the depositing device has a continuously moving Ablegesiebband for the spunbonded web and at least one provided under the Ablegesiebband suction device. The at least one suction device is preferably designed as a suction fan. Appropriately, these are at least one controllable and / or controllable suction blower. - According to a very preferred embodiment of the invention, at least three Absaugbereiche are arranged one behind the other in the direction of movement of Ablegesiebbandes, wherein a Hauptabsaugbereich is arranged in the storage area of the spunbonded web, wherein a first suction area in front of the storage area and wherein a second suction area is arranged after the storage area. The first suction area is thus arranged in the production direction in front of the storage area or in front of the main suction area, and the second suction area is arranged downstream of the storage area or main suction area in the production direction. The main suction region is expediently separated from the first suction region and from the second suction region by corresponding walls. Preferably, the walls of the Hauptabsaugbereiches are nozzle-like. It is within the scope of the invention that the suction speed in the main suction area is greater than the suction speeds in the first suction area and in the second suction area.

Mit der erfindungsgemäßen Anlage können im Vergleich zu der eingangs erläuterten aus dem Stand der Technik bekannten Anlage die Filamentgeschwindigkeit sowie die Filamentfeinheit beachtlich gesteigert werden. Es können somit höhere Filamentdurchsätze und Filamente mit feineren Titern erzielt werden. Problemlos ist eine Verringerung des Titers auf Werte deutlich unter 1 möglich. Die erfindungsgemäße Anlage eignet sich für eine breite Anwendung insbesondere auch für Polyesterfilamente. Mit der erfindungsgemäßen Anlage können sehr gleichmäßige homogene Vliese hergestellt werden, die sich durch eine optisch hohe Qualität auszeichnen.With the system according to the invention, the filament speed and the filament fineness can be considerably increased in comparison with the system known from the prior art explained at the outset. It can thus higher filament rates and filaments with finer titers be achieved. A reduction of the titer to values well below 1 is easily possible. The system according to the invention is suitable for a broad application in particular also for polyester filaments. With the system according to the invention very uniform homogeneous nonwovens can be produced, which are characterized by a visually high quality.

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

Fig. 1
einen Vertikalschnitt durch eine erfindungsgemäße Anlage,
Fig. 2
den vergrößerten Ausschnitt A aus dem Gegenstand der Fig. 1,
Fig. 3
den vergrößerten Ausschnitt B aus dem Gegenstand der Fig. 1 und
Fig. 4
den vergrößerten Ausschnitt C aus dem Gegenstand der Fig. 1.
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 vertical section through a plant according to the invention,
Fig. 2
the enlarged section A of the article of Fig. 1,
Fig. 3
the enlarged detail B of the article of FIG. 1 and
Fig. 4
the enlarged section C of the subject matter of FIG. 1.

Die Figuren zeigen eine Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff. Die Anlage weist eine Spinnerette 1 sowie eine unterhalb der Spinnerette 1 angeordnete Kühlkammer 2 auf, in die Prozessluft zur Kühlung der Filamente einführbar ist. An die Kühlkammer 2 schließt ein Zwischenkanal 3 an. Nach dem Zwischenkanal 3 folgt eine Verstreckeinheit 4 mit einem Unterziehkanal 5. An den Unterziehkanal 5 schließt eine Verlegeeinheit 6 an. Unterhalb der Verlegeeinheit 6 ist eine Ablegeeinrichtung in Form eines kontinuierlich bewegten Ablegesiebbandes 7 zur Ablage der Filamente zur Spinnvliesbahn vorgesehen.The figures show a plant for the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material. The system has a spinnerette 1 and a cooling chamber 2 arranged below the spinnerette 1, into which process air for cooling the filaments can be inserted. To the cooling chamber 2 includes an intermediate channel 3. After this Intermediate channel 3 follows a stretching unit 4 with a Unterziehkanal 5. At the lower channel 5 includes a laying unit 6 at. Below the laying unit 6, a laying device in the form of a continuously moving Ablegesiebbandes 7 is provided for storing the filaments to the spunbonded web.

Fig. 2 zeigt die erfindungsgemäße Kühlkammer 2 der Anlage sowie die neben der Kühlkammer 2 angeordnete Luftzufuhrkabine 8. Die Luftzufuhrkabine 8 ist im Ausführungsbeispiel in einen oberen Kabinenabschnitt 8a und einen unteren Kabinenabschnitt 8b unterteilt. Aus den beiden Kabinenabschnitten 8a, 8b ist Prozessluft unterschiedlicher Temperatur zuführbar. Zweckmäßigerweise und im Ausführungsbeispiel gelangt aus dem oberen Kabinenabschnitt 8a Prozessluft mit einer Temperatur zwischen 18 °C und 70 °C in die Kühlkammer. Vorzugsweise gelangt aus dem unteren Kabinenabschnitt 8b Prozessluft mit einer Temperatur zwischen 18 °C und 35 °C in die Kühlkammer 2. Bevorzugt hat die aus dem oberen Kabinenabschnitt 8a austretende Prozessluft eine höhere Temperatur als die aus dem unteren Kabinenabschnitt 8b austretende Prozessluft. Grundsätzlich kann die aus dem oberen Kabinenabschnitt 8a austretende Prozessluft aber auch eine niedrigere Temperatur haben als die aus dem unteren Kabinenabschnitt 8b austretende Prozessluft. Die Prozessluft wird dabei im Übrigen von den aus der Spinnerette 1 austretenden und nicht dargestellten Filamenten angesaugt. Zweckmäßigerweise und im Ausführungsbeispiel ist an die Kabinenabschnitte 8a, 8b jeweils ein Gebläse 9a, 9b zur Zuführung von Prozessluft angeschlossen. Es liegt dabei im Rahmen der Erfindung, dass die Volumenströme der zugeführten Prozessluft regelbar sind. Erfindungsgemäß ist auch die Temperatur der jeweils in den oberen Kabinenabschnitt 8a oder in den unteren Kabinenabschnitt 8b eintretenden Prozessluft regelbar. Es liegt im Rahmen der Erfindung, dass die Kabinenabschnitte 8a, 8b sowohl rechts als auch links von der Kühlkammer 2 angeordnet sind. Die2 shows the cooling chamber 2 of the system according to the invention and the air supply cabin 8 arranged next to the cooling chamber 2. The air supply cabin 8 is subdivided in the exemplary embodiment into an upper cabin section 8a and a lower cabin section 8b. From the two cabin sections 8a, 8b process air of different temperature can be supplied. Expediently and in the exemplary embodiment, process air having a temperature between 18 ° C. and 70 ° C. enters the cooling chamber from the upper cabin section 8 a. Preferably, process air having a temperature between 18 ° C. and 35 ° C. enters the cooling chamber 2 from the lower cabin section 8b. The process air emerging from the upper cabin section 8a preferably has a higher temperature than the process air exiting from the lower cabin section 8b. In principle, however, the process air emerging from the upper cabin section 8a may also have a lower temperature than the process air exiting from the lower cabin section 8b. Incidentally, the process air is sucked in by the filaments emerging from the spinnerette 1 and not shown. Conveniently and in the exemplary embodiment, a fan 9a, 9b for supplying process air is connected to the cabin sections 8a, 8b in each case. It is within the scope of the invention that the volume flows of the supplied process air can be regulated. According to the invention, the temperature of the process air entering the upper cabin section 8a or the lower cabin section 8b can also be regulated. It is within the scope of the invention that the cabin sections 8a, 8b are arranged both to the right and to the left of the cooling chamber 2. The

linken Hälften der Kabinenabschnitte 8a, 8b sind ebenfalls an die entsprechenden Gebläse 9a, 9b angeschlossen.Left halves of the cabin sections 8a, 8b are also connected to the respective fans 9a, 9b.

Insbesondere in der Fig. 2 ist erkennbar, dass zwischen der Düsenplatte 10 der Spinnerette 1 und der Luftzufuhrkabine 8 eine Monomerabsaugungsvorrichtung 27 angeordnet ist, mit der beim Spinnprozess auftretende störende Gase aus der Anlage entfernt werden können. Die Monomerabsaugungsvorrichtung 27 weist eine Absaugungskammer 28 sowie ein an die Absaugungskammer 28 angeschlossenes Absaugungsgebläse 29 auf. Im unteren Bereich der Absaugungskammer 28 ist ein erster Absaugungsschlitz 30 vorgesehen. Erfindungsgemäß ist zusätzlich im oberen Bereich der Absaugungskammer 28 ein zweiter Absaugungsschlitz 31 angeordnet. Zweckmäßigerweise und im Ausführungsbeispiel ist der zweite Absaugungsschlitz 31 schmaler als der erste Absaugungsschlitz 30 ausgeführt. Mit dem zusätzlichen zweiten Absaugungsschlitz 31 werden erfindungsgemäß störende Turbulenzen zwischen der Düsenplatte 10 und der Monomerabsaugungsvorrichtung 27 vermieden.2, it can be seen that a monomer extraction device 27 is arranged between the nozzle plate 10 of the spinnerette 1 and the air supply cabin 8, with which disruptive gases occurring during the spinning process can be removed from the system. The monomer suction device 27 has an extraction chamber 28 and a suction fan 29 connected to the extraction chamber 28. In the lower region of the suction chamber 28, a first suction slot 30 is provided. According to the invention, a second suction slot 31 is additionally arranged in the upper region of the suction chamber 28. Appropriately, and in the embodiment, the second suction slot 31 is made narrower than the first suction slot 30. With the additional second suction slot 31 disturbing turbulence between the nozzle plate 10 and the monomer extraction device 27 are avoided according to the invention.

In Fig. 1 ist erkennbar, dass der Zwischenkanal 3 vom Austritt der Kühlkammer 2 zum Eintritt des Unterziehkanals 5 der Verstreckeinheit 4 im Vertikalschnitt keilförmig zusammenläuft und zwar zweckmäßigerweise und im Ausführungsbeispiel auf die Eintrittsbreite des Unterziehkanals 5. Nach sehr bevorzugter Ausführungsform der Erfindung und im Ausführungsbeispiel sind unterschiedliche Steigungswinkel des Zwischenkanals 3 einstellbar. Vorzugsweise und im Ausführungsbeispiel läuft der Unterziehkanal 5 zur Verlegeeinheit 6 hin im Vertikalschnitt keilförmig zusammen. Es liegt im Rahmen der Erfindung, dass die Kanalweite des Unterziehkanals 5 einstellbar ist.In Fig. 1 it can be seen that the intermediate channel 3 from the outlet of the cooling chamber 2 to the inlet of the Unterziehkanals 5 of the stretching unit 4 in a vertical section converges wedge-shaped and that expediently and in the embodiment of the inlet width of the Unterziehkanals 5. According to a very preferred embodiment of the invention and in the embodiment, different pitch angle of the intermediate channel 3 are adjustable. Preferably and in the exemplary embodiment, the lower channel 5 runs in a wedge shape in vertical section in the direction of the laying unit 6. It is within the scope of the invention that the channel width of the Unterziehkanals 5 is adjustable.

Insbesondere in der Fig. 3 ist erkennbar, dass die Verlegeeinheit 6 aus einem ersten Diffusor 13 und einem daran anschließenden zweiten Diffusor 14 besteht und dass zwischen dem ersten Diffusor 13 und dem zweiten Diffusor 14 ein Umgebungslufteintrittsspalt 15 vorgesehen ist. Fig. 3 zeigt, dass jeder Diffusor 13, 14 ein oberen konvergierendes Teil sowie ein unteres divergierendes Teil aufweist. Folglich hat jeder Diffusor 13, 14 eine engste Stelle zwischen dem oberen konvergierenden Teil und dem unteren divergierenden Teil. Im ersten Diffusor 13 kommt es zu einer Reduzierung der zur Verstreckung der Filamente notwendigen hohen Luftgeschwindigkeiten am Ende der Verstreckeinheit 4. Dadurch resultiert ein deutlicher Druckrückgewinn. Der erste Diffusor 13 weist einen divergierenden Bereich 32 auf, dessen Seitenwände 16, 17 klappenartig verstellbar sind. Auf diese Weise kann ein Öffnungswinkel α des divergierenden Bereiches 32 eingestellt werden. Dieser Öffnungswinkel α liegt zweckmäßigerweise zwischen 0,5 und 3° und beträgt vorzugsweise 1° oder etwa 1°.Der Öffnungswinkel α ist bevorzugt stufenlos einstellbar. Die Verstellung der Seitenwände 16, 17 kann sowohl symmetrisch als auch asymmetrisch zur Mittelebene M erfolgen.In particular, in FIG. 3 it can be seen that the laying unit 6 consists of a first diffuser 13 and an adjoining second diffuser 14 and that an ambient air inlet gap 15 is provided between the first diffuser 13 and the second diffuser 14. Fig. 3 shows that each diffuser 13, 14 has an upper converging part and a lower diverging part. Consequently, each diffuser 13, 14 has a narrowest point between the upper converging part and the lower diverging part. In the first diffuser 13, there is a reduction of the high air velocities necessary for drawing the filaments at the end of the drawing unit 4. This results in a clear pressure recovery. The first diffuser 13 has a divergent region 32, the side walls 16, 17 are flap-like adjustable. In this way, an opening angle α of the diverging region 32 can be adjusted. This opening angle α is expediently between 0.5 and 3 ° and is preferably 1 ° or about 1 °. The opening angle α is preferably stepless adjustable. The adjustment of the side walls 16, 17 can be done both symmetrically and asymmetrically to the center plane M.

Zu Beginn des zweiten Diffusors 14 wird durch den Umgebungslufteintrittsspalt 15 Sekundärluft nach dem Injektorprinzip angesaugt. Aufgrund des hohen Austrittsimpulses der Prozessluft aus dem ersten Diffusor 13 wird die Sekundärluft aus der Umgebung über diesen Umgebungslufteintrittsspalt 15 angesaugt. Die Weite des Umgebungslufteintrittsspaltes 15 ist zweckmäßigerweise und im Ausführungsbeispiel einstellbar. Weiterhin ist auch der Öffnungswinkel β des zweiten Diffusors 14 vorzugsweise stufenlos verstellbar. Außerdem ist der zweite Diffusor 14 höhenverstellbar eingerichtet. Auf diese Weise kann der Abstand a des zweiten Diffusors 14 zum Ablegesiebband 7 eingestellt werden. Durch die Höhenverstellbarkeit des zweiten Diffusors 14 und/oder durch die Verschwenkbarkeit der Seitenwände 16, 17 im divergierenden Bereich 32 des ersten Diffusors 13 kann die Weite des Umgebungslufteintrittsspaltes 15 eingestellt werden. Es liegt im Rahmen der Erfindung, dass der Umgebungslufteintrittsspalt 15 so eingestellt wird, dass ein tangentiales Zuströmen der Sekundärluft erfolgt. In der Fig. 3 sind im Übrigen einige charakteristische Abmessungen der Verlegeeinheit 6 eingezeichnet. Der Abstand s2 zwischen der Mittelebene M und einer Seitenwand 16, 17 des ersten Diffusors 13 beträgt zweckmäßigerweise 0,8 s1 bis 2,5 s1 (s1 entspricht dabei dem Abstand der Mittelebene M zur Seitenwandung an der engsten Stelle des ersten Diffusors 13). Der Abstand s3 der Mittelebene M zur Seitenwandung an der engsten Stelle des zweiten Diffusors 14 beträgt vorzugsweise 0,5 s2 bis 2 s2. Der Abstand s4 der Mittelebene M zur unteren Kante der Seitenwandung des zweiten Diffusors 14 beträgt 1 s2 bis 10 s2. Die Länge L2 hat einen Wert von 1 s2 bis 15 s2. Für die Weite des Umgebungslufteintrittsspaltes 15 sind verschiedene variable Werte möglich.At the beginning of the second diffuser 14, secondary air is sucked in according to the injector principle by the ambient air inlet gap 15. Due to the high exit pulse of the process air from the first diffuser 13, the secondary air is sucked in from the environment via this ambient air inlet gap 15. The width of the ambient air inlet gap 15 is expediently and in the embodiment adjustable. Furthermore, the opening angle β of the second diffuser 14 is preferably continuously adjustable. In addition, the second diffuser 14 is adjustable in height. In this way, the distance a of the second diffuser 14 to the Ablegesiebband 7 can be adjusted. Due to the height adjustability of the second diffuser 14 and / or by the pivotability of the side walls 16, 17 in the diverging region 32 of the first diffuser 13, the width of the ambient air inlet gap 15 can be adjusted. It is within the scope of the invention that the ambient air inlet gap 15 is set so that a tangential inflow of the secondary air takes place. By the way, some characteristic dimensions of the laying unit 6 are shown in FIG. The distance s 2 between the median plane M and a side wall 16, 17 of the first diffuser 13 is expediently 0.8 s 1 to 2.5 s 1 (s 1 corresponds to the distance of the median plane M to the side wall at the narrowest point of the first diffuser 13). The distance s 3 of the median plane M to the side wall at the narrowest point of second diffuser 14 is preferably 0.5 s 2 to 2 s 2 . The distance s 4 of the median plane M to the lower edge of the side wall of the second diffuser 14 is 1 s 2 to 10 s 2 . The length L 2 has a value of 1 s 2 to 15 s 2 . For the width of the ambient air inlet gap 15 different variable values are possible.

Erfindungsgemäß bildet das Aggregat aus Kühlkammer 2, Zwischenkanal 3, Verstreckeinheit 4 und Verlegeeinheit 6, abgesehen von der Luftansaugung in der Kühlkammer 2 und dem Lufteintritt am Umgebungslufteintrittsspalt 15 ein geschlossenes System.According to the invention the aggregate of cooling chamber 2, intermediate channel 3, drawing unit 4 and laying unit 6, apart from the air intake in the cooling chamber 2 and the air inlet at the ambient air inlet gap 15 forms a closed system.

Fig. 4 zeigt ein kontinuierlich bewegtes Ablegesiebband 7 für die nicht dargestellte Spinnvliesbahn. Vorzugsweise und im Ausführungsbeispiel sind in Bewegungsrichtung des Ablegesiebbandes 7 drei Absaugbereiche 18, 19, 20 hintereinander angeordnet. Im Ablagebereich der Spinnvliesbahn ist ein Hauptabsaugbereich 19 vorgesehen. Ein erster Absaugbereich 18 ist vor dem Ablagebereich bzw. vor dem Hauptabsaugbereich 19 angeordnet. Ein zweiter Absaugbereich 20 ist dem Hauptabsaugbereich 19 nachgeschaltet. Grundsätzlich kann jedem Absaugbereich 18, 19, 20 ein separates Sauggebläse zugeordnet sein. Es liegt aber auch im Rahmen der Erfindung, dass lediglich ein Sauggebläse vorgesehen ist und dass die jeweiligen Saugbedingungen in den Absaugbereichen 18, 19, 20 mit Hilfe von Stell- und Drosselorganen eingestellt werden. Der erste Absaugbereich 18 wird durch die Wandungen 21 und 22 begrenzt. Der zweite Absaugbereich 20 wird durch die Wandungen 23 und 24 begrenzt. Die Wandungen 22, 23 des Hauptabsaugbereiches 19 bilden vorzugsweise und im Ausführungsbeispiel eine Düsenkontur. Die Absauggeschwindigkeit im Hauptabsaugbereich 19 ist zweckmäßigerweise höher als die Absauggeschwindigkeiten im ersten Absaugbereich 18 und im zweiten Absaugbereich 20. Es liegt im Rahmen der Erfindung, dass die Saugleistung in dem Hauptabsaugbereich 19 unabhängig von den Saugleistungen im ersten Absaugbereich 18 und im zweiten Absaugbereich 20 gesteuert und/oder geregelt wird. Die Aufgabe des ersten Absaugbereiches 18 besteht darin, die mit dem Ablegesiebband 7 zugeführten Luftmengen abzuführen und die Strömungsvektoren an der Grenze zum Hauptabsaugbereich 19 orthogonal bezüglich des Ablegesiebbandes 7 auszurichten. Im Übrigen dient der erste Absaugbereich 18 dazu, hier bereits abgelegte Filamente funktionssicher auf dem Ablegesiebband 7 zu halten. Im Hauptabsaugbereich 19 soll die mit den Filamenten mitgeführte Luft ungehindert abströmen können, so dass das Spinnvlies funktionssicher abgelegt werden kann. Der zweite Absaugbereich 20, der dem Hauptabsaugbereich 19 nachgeschaltet ist, dient zur Transportsicherung bzw. zum Festhalten des abgelegten Spinnvlieses auf dem Ablegesiebband 7. Es liegt im Rahmen der Erfindung, dass zumindest ein Teil des zweiten Absaugbereiches 20 in Transportrichtung des Ablegesiebbandes 7 vor dem Andrückwalzenpaar 33 angeordnet ist. Zweckmäßigerweise liegt zumindest ein Drittel der Länge des zweiten Absaugbereicheiches 20, vorzugsweise zumindest die Hälfte der Länge des zweiten Absaugbereiches 20, bezogen auf die Transportrichtung, vor dem Andrückwalzenpaar 33.Fig. 4 shows a continuously moving Ablegesiebband 7 for the spunbonded nonwoven web, not shown. Preferably and in the exemplary embodiment, three suction regions 18, 19, 20 are arranged one behind the other in the direction of movement of the discharge screen belt 7. In the storage area of the spunbonded web a Hauptabsaugbereich 19 is provided. A first suction area 18 is arranged in front of the storage area or in front of the main suction area 19. A second suction region 20 is connected downstream of the main suction region 19. In principle, each suction area 18, 19, 20 can be assigned a separate suction fan. However, it is also within the scope of the invention that only a suction fan is provided and that the respective suction conditions in the suction areas 18, 19, 20 are adjusted by means of adjusting and throttle bodies. The first suction region 18 is bounded by the walls 21 and 22. The second suction region 20 is bounded by the walls 23 and 24. The walls 22, 23 of the Hauptabsaugbereiches 19th form preferably and in the embodiment, a nozzle contour. The suction speed in Hauptabsaugbereich 19 is advantageously higher than the suction speeds in the first suction 18 and the second suction 20. It is within the scope of the invention that the suction power in the Hauptabsaugbereich 19 regardless of the suction in the first suction 18 and the second suction 20 controlled / or regulated. The task of the first suction area 18 is to remove the quantities of air supplied with the discharge screen belt 7 and to align the flow vectors at the border to the main suction area 19 orthogonally with respect to the discharge screen belt 7. Incidentally, the first suction area 18 serves to keep filaments already stored here reliably on the reject screen belt 7. In the Hauptabsaugbereich 19 entrained with the filaments air can flow freely, so that the spunbonded can be stored reliable. It is within the scope of the invention that at least part of the second suction region 20 in the transport direction of the Ablegesiebbandes 7 in front of the pressure roller pair 33 is arranged. Conveniently, at least one third of the length of the second Absaugbereichsiches 20, preferably at least half the length of the second Absaugbereiches 20, based on the transport direction, before the Andrückwalzenpaar 33rd

Claims (9)

  1. Installation for the continuous production of a spunbonded nonwoven web composed of aerodynamically stretched filaments of thermoplastic plastic, comprising a spinneret (1), a cooling chamber (2), into which process air can be introduced from an air supply cubicle (8) in order to cool the filaments, a stretching unit (4) with a drawing-down channel (5), wherein the stretching unit (4) is adjoined by a laying unit (6) with at least one diffuser (13, 14), and a depositing device for depositing the filaments to form the spunbonded nonwoven web, wherein the air supply cubicle (8) arranged next to the cooling chamber (2) is divided into at least two cubicle sections (8a, 8b), from each of which process air can be supplied at different temperatures, and wherein the connection between the cooling chamber (2) and the stretching unit (4) is closed off from outside and is free of any air supply.
  2. Installation according to claim 1, wherein process air at a temperature between 15°C and 75°C, preferably between 18°C and 70°C, can be supplied from a first cubicle section (8a), and wherein process air at a temperature between 15°C and 38°C, preferably between 18°C and 35°C, can be supplied from a second cubicle section (8b).
  3. Installation according to one of claims 1 or 2, wherein the mutual spacing of the nozzle bores of the spinneret (1) is greater in the middle of the spinneret (1) than in the outer regions.
  4. Installation according to one of claims 1 to 3, wherein a monomer extraction device (27) for extracting gases which arise during the spinning process is provided between the spinneret (1) and the air supply cubicle (8).
  5. Installation according to one of claims 1 to 4, wherein an intermediate channel (3) is arranged between the cooling chamber (2) and the stretching unit (4), which intermediate channel (3), as seen in vertical section, converges in a wedge-shaped manner from the outlet of the cooling chamber (2) to the inlet of the drawing-down channel (5) of the stretching unit (4), and wherein different angles of inclination of the intermediate channel (3) can be set.
  6. Installation according to one of claims 1 to 5, wherein the laying unit (6) consists of a first diffuser (13) and an adjacent second diffuser (14), and wherein an ambient air inlet gap (15) is provided between the first diffuser (13) and the second diffuser (14).
  7. Installation according to one of claims 1 to 6, wherein the depositing device comprises a continuously moving depositing screen belt (7) for the spunbonded nonwoven web, and at least one suction device which is provided below the depositing screen belt (7).
  8. Installation according to claim 7, wherein at least three separate extraction regions are arranged one behind the other in the movement direction of the depositing screen belt (7), wherein a main extraction region (19) is arranged in the depositing region of the spunbonded nonwoven web, wherein a first extraction region (18) is arranged upstream of the depositing region, and wherein a second extraction region (20) is arranged downstream of the depositing region.
  9. Installation according to claim 8, wherein the suction power of the main extraction region (19) can be adjusted independently of the suction power in the first extraction region (18) and in the second extraction region (20).
EP02004615A 2002-02-28 2002-02-28 Apparatus for the continuous production of a spunbonded web Expired - Lifetime EP1340843B1 (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
EP02004615A EP1340843B1 (en) 2002-02-28 2002-02-28 Apparatus for the continuous production of a spunbonded web
DE50211394T DE50211394D1 (en) 2002-02-28 2002-02-28 Plant for the continuous production of a spunbonded web
DK02004615T DK1340843T3 (en) 2002-02-28 2002-02-28 Plant for continuous fabrication of a spun felt web
SI200230653T SI1340843T1 (en) 2002-02-28 2002-02-28 Apparatus for the continuous production of a spunbonded web
TR2003/02088T TR200302088T3 (en) 2002-02-28 2002-02-28 Plant for continuous production of a woven wool line
ES02004615T ES2207428T3 (en) 2002-02-28 2002-02-28 INSTALLATION FOR THE CONTINUOUS MANUFACTURE OF A SPINNING HAND BAND.
AT02004615T ATE381630T1 (en) 2002-02-28 2002-02-28 SYSTEM FOR THE CONTINUOUS PRODUCTION OF A SPUNNOVED WEB
CNB021217890A CN100366810C (en) 2002-02-28 2002-05-31 Equipment for continuously producing non-woven fabric web
ARP030100611A AR038608A1 (en) 2002-02-28 2003-02-25 SYSTEM FOR THE CONTINUOUS MANUFACTURE OF A NON-WOVEN FABRIC NAPA
IL154631A IL154631A (en) 2002-02-28 2003-02-26 Arrangement for the continuous production of a filament nonwoven fibrous web
MXPA03001723A MXPA03001723A (en) 2002-02-28 2003-02-26 Arrangement for the continuous production of a filament nonwoven fibrous web.
KR1020030012229A KR100920436B1 (en) 2002-02-28 2003-02-27 Arrangement for the continuous production of a filament non-woven fibrous web
RU2003105789/12A RU2260083C2 (en) 2002-02-28 2003-02-27 Apparatus for continuous manufacture of nonwoven fibrous fabric from threads
MYPI20030688A MY135631A (en) 2002-02-28 2003-02-27 Arrangement for the continuous production of a filament nonwoven fibrous web
BRPI0300508-9A BR0300508B1 (en) 2002-02-28 2003-02-27 installation for the continuous production of non-woven fibrous filament fabric.
CZ2003-581A CZ305424B6 (en) 2002-02-28 2003-02-27 Arrangement for the continuous production of a non-woven fibrous web
JP2003050834A JP3704522B2 (en) 2002-02-28 2003-02-27 Equipment for continuous production of nonwoven fiber webs
PL358929A PL206768B1 (en) 2002-02-28 2003-02-27 System for continuous manufacture of non-woven fibrous yarn
US10/375,892 US6918750B2 (en) 2002-02-28 2003-02-27 Arrangement for the continuous production of a filament nonwoven fibrous web
CA002420520A CA2420520C (en) 2002-02-28 2003-02-27 Arrangement for the continuous production of a filament nonwoven fibrous web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02004615A EP1340843B1 (en) 2002-02-28 2002-02-28 Apparatus for the continuous production of a spunbonded web

Publications (2)

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EP1340843A1 EP1340843A1 (en) 2003-09-03
EP1340843B1 true EP1340843B1 (en) 2007-12-19

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US (1) US6918750B2 (en)
EP (1) EP1340843B1 (en)
JP (1) JP3704522B2 (en)
KR (1) KR100920436B1 (en)
CN (1) CN100366810C (en)
AR (1) AR038608A1 (en)
AT (1) ATE381630T1 (en)
BR (1) BR0300508B1 (en)
CA (1) CA2420520C (en)
CZ (1) CZ305424B6 (en)
DE (1) DE50211394D1 (en)
DK (1) DK1340843T3 (en)
ES (1) ES2207428T3 (en)
IL (1) IL154631A (en)
MX (1) MXPA03001723A (en)
MY (1) MY135631A (en)
PL (1) PL206768B1 (en)
RU (1) RU2260083C2 (en)
SI (1) SI1340843T1 (en)
TR (1) TR200302088T3 (en)

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DE19620379C2 (en) 1996-05-21 1998-08-13 Reifenhaeuser Masch Plant for the continuous production of a spunbonded nonwoven web
FR2792655B1 (en) * 1999-04-23 2001-06-01 Icbt Perfojet Sa INSTALLATION FOR THE MANUFACTURE OF A NONWOVEN TEXTILE TABLECLOTH AND METHOD FOR IMPLEMENTING SUCH AN INSTALLATION
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JP4233181B2 (en) 1999-09-30 2009-03-04 新日本石油株式会社 Method and apparatus for producing a horizontally arranged web
US6607624B2 (en) * 2000-11-20 2003-08-19 3M Innovative Properties Company Fiber-forming process
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EP2907909A1 (en) 2014-02-17 2015-08-19 Reifenhäuser GmbH & Co. KG Maschinenfabrik Assembly for the continuous production of a woven material
RU2710675C1 (en) * 2016-01-27 2019-12-30 Райфенхойзер Гмбх Унд Ко. Кг Машиненфабрик Device for production of spunbonded nonwoven materials

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CZ2003581A3 (en) 2003-10-15
ES2207428T3 (en) 2008-04-16
SI1340843T1 (en) 2008-04-30
ATE381630T1 (en) 2008-01-15
AR038608A1 (en) 2005-01-19
US20030178742A1 (en) 2003-09-25
KR20030071543A (en) 2003-09-03
US6918750B2 (en) 2005-07-19
DK1340843T3 (en) 2008-05-05
ES2207428T1 (en) 2004-06-01
EP1340843A1 (en) 2003-09-03
KR100920436B1 (en) 2009-10-08
BR0300508A (en) 2004-08-10
JP2004003080A (en) 2004-01-08
MY135631A (en) 2008-05-30
MXPA03001723A (en) 2004-12-07
TR200302088T3 (en) 2004-01-21
DE50211394D1 (en) 2008-01-31
PL358929A1 (en) 2003-09-08
CA2420520A1 (en) 2003-08-28
CN100366810C (en) 2008-02-06
PL206768B1 (en) 2010-09-30
CA2420520C (en) 2007-01-23
CZ305424B6 (en) 2015-09-16
IL154631A (en) 2008-04-13
CN1441104A (en) 2003-09-10
RU2260083C2 (en) 2005-09-10
JP3704522B2 (en) 2005-10-12
BR0300508B1 (en) 2012-12-11
IL154631A0 (en) 2003-09-17

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