EP1340844B1 - Meltblown apparatus - Google Patents

Meltblown apparatus Download PDF

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Publication number
EP1340844B1
EP1340844B1 EP02004616A EP02004616A EP1340844B1 EP 1340844 B1 EP1340844 B1 EP 1340844B1 EP 02004616 A EP02004616 A EP 02004616A EP 02004616 A EP02004616 A EP 02004616A EP 1340844 B1 EP1340844 B1 EP 1340844B1
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EP
European Patent Office
Prior art keywords
suction
meltblown
zone
collecting
zones
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
EP02004616A
Other languages
German (de)
French (fr)
Other versions
EP1340844A1 (en
Inventor
Axel Becker
Hans-Peter Dr. Schlag
Hans-Georg Geus
Detlef Frey
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27675666&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1340844(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to DK02004616T priority Critical patent/DK1340844T3/en
Priority to EP02004616A priority patent/EP1340844B1/en
Priority to DE50210973T priority patent/DE50210973D1/en
Priority to ES02004616T priority patent/ES2290209T3/en
Priority to AT02004616T priority patent/ATE374268T1/en
Priority to ARP030100554A priority patent/AR038538A1/en
Priority to MXPA03001671A priority patent/MXPA03001671A/en
Priority to IL154630A priority patent/IL154630A/en
Priority to BRPI0300319-1A priority patent/BR0300319B1/en
Priority to CA002420517A priority patent/CA2420517C/en
Priority to US10/375,894 priority patent/US7004738B2/en
Priority to KR1020030012232A priority patent/KR100897315B1/en
Priority to MYPI20030693A priority patent/MY138472A/en
Priority to JP2003050816A priority patent/JP4229724B2/en
Priority to CNB031067832A priority patent/CN1261232C/en
Priority to SA03240174A priority patent/SA03240174B1/en
Publication of EP1340844A1 publication Critical patent/EP1340844A1/en
Publication of EP1340844B1 publication Critical patent/EP1340844B1/en
Application granted granted Critical
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—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
    • D01D5/098—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 meltblown plant for the production of meltblown products, with a filament dispensing nozzle head, wherein below the nozzle head a continuously movable Ablegesiebband is arranged on which the filaments for Meltblown product can be stored and wherein the Ablegesiebband a suction device for suction is provided by air through the Ablegesiebband.
  • a meltblown plant or in the meltblown process the polymer melt emerging from the nozzle head is subjected to a blast air flow. As a result, polymer fibers are formed from the melt, which are then deposited to the meltblown product on the Ablegesiebband.
  • meltblown products are often obtained which have undesirable irregularities or inhomogeneities.
  • a more or less strong fiber fly often takes place in the extraction zone or in the region of the Ablegesiebbandes, which causes uncontrolled storage of the fibers and thus causes irregularities in the meltblown product.
  • These irregularities relate in particular to the product thickness, the air permeability and the ratio transverse strength / longitudinal strength of the produced fiber mat, as well as irregularities in the surface of the fiber mat Meltblown product. As a result, the product quality of the meltblown products leaves something to be desired.
  • meltblown plants of the type mentioned above can be made with the meltblown products that are characterized by homogeneity and uniformity in terms of their properties and in particular also have an optimal surface quality.
  • meltblown products should be able to be produced which have a uniform product thickness and a constant ratio between transverse strength and longitudinal strength.
  • the air permeability should be as constant as possible at different points of the meltblown product.
  • the invention teaches a meltblown plant of the type mentioned, which is characterized in that the reject screen has in its longitudinal direction a plurality of separate suction, that one of these Absaug Societye is the Ablegezone associated Hauptabsaug Colour and that in the Absaug Colouren the suction speeds are each independently adjustable.
  • the Ablegesiebbandes In the longitudinal direction of the Ablegesiebbandes means in the conveying direction or transport direction of Ablegesiebbandes.
  • the plurality of separate suction areas are thus arranged one behind the other in the conveying direction or transport direction of the Ablegesiebbandes.
  • depositing zone is meant the area of the reject screen, in which most of the filaments are deposited or in which all or almost all filaments are deposited.
  • the extraction speed can be set separately and independently of the other extraction areas.
  • Suction rate means the speed of the suctioned or sucked air in m / s.
  • the suction device or the suction fan of the suction device is arranged below the Ablegesiebbandes.
  • the nozzle head delivering the filaments is designed as a meltblown die. It is also within the scope of the invention that the nozzle head of the meltblown system has a plurality of nozzle bores or nozzle openings arranged in a row for the polymer melt outlet. After that, therefore, only a single row of nozzle openings is provided. Furthermore, the meltblown system according to the invention preferably has a longitudinal nozzle for the outlet of tempered blowing air, with which blowing air the polymer melt or the emerging filaments are acted upon.
  • At least three suction regions which are separate from one another are arranged in the longitudinal direction or in the conveying direction of the depositing screen belt one behind the other.
  • One of these suction areas is the Feldabsaug Colour.
  • four separate suction areas are provided and a first suction area and a second suction area with respect to the conveying direction of the Ablegesiebbandes arranged in front of the Hauptabsaug Colour and it is still a third suction in the conveying direction of Ablegesiebbandes behind the Hauptabsaug Colour arranged.
  • This embodiment with four separate suction regions has proven particularly useful in the context of the invention.
  • the extraction speed in the main suction area is higher than in the other extraction areas.
  • the suction speed in the main suction area is higher than the suction speeds in the first, in the second and in the third suction area.
  • the speed of extraction in the main suction area is at least twice as high as the extraction speed in each of the further suction areas.
  • the extraction speed in the main suction area is preferably at least twice as high as the extraction speed in the first suction area or in the second suction area.
  • the extraction speed in the main suction area is at least twice as high as the extraction speed in the third suction area.
  • each suction area is assigned its own suction fan.
  • the suction device of the meltblown system thus comprises a plurality of suction fans.
  • the suction speed can be set separately for each suction fan on each suction fan.
  • the aspirated volume flows can be set completely independently of each other.
  • the setting can be made with the proviso that the suction in the Hauptabsaug Scheme twice as large as in each of the other Absaug Kunststoffe.
  • the individual suction areas are separated by boundary walls made of sheet metal. These are preferably vertically oriented metal sheets. Vertical also means essentially vertical.
  • the invention is based on the finding that the storage of a meltblown product or a nonwoven web can be optimally and reliably controlled with the meltblown system according to the invention.
  • an undesired fiber fly in the region of the Ablegesiebbandes can be excluded or effectively reduced.
  • a very uniform yarn placement can be achieved and inhomogeneities in the stored meltblown product can be surprisingly minimized to a large extent. Disturbing thick spots or thin spots in the produced meltblown product are not observed. Even disturbing inhomogeneities with respect to the air permeability of the web or with respect to the ratio transverse strength / longitudinal strength can be excluded.
  • the main suction region can be made shorter than the suction region existing in the meltblown systems known from practice with respect to the longitudinal direction or transport direction of the deposition sieve belt.
  • the single suction region in the laying zone which requires a high suction speed, would have to be made wider in the transport direction of the laying sieve belt. In the known meltblown systems, therefore, an unnecessarily high volume flow is sucked off, which in turn means a high expenditure of energy.
  • the figures show a meltblown plant according to the invention for the production of meltblown products, namely nonwoven webs.
  • the meltblown system has a nozzle head 1, from whose nozzle openings 2 filaments 3 are extruded.
  • the nozzle head 1 has a row with a plurality of nozzle openings 2.
  • the filaments 3 are acted upon by tempered blowing air 4, whose flow direction is represented in the figures by corresponding arrows.
  • a continuously movable Ablegesiebband 5 is arranged, on which the filaments 3 to the meltblown nonwoven web can be stored. Through the reject strainer 5 air is sucked, so that the filaments 3 are sucked onto the Ablegesiebband as it were.
  • the Ablegesiebband 5 four separate suction areas 6, 7, 8, 9.
  • One of these suction areas 6, 7, 8, 9 is the main suction area 8 assigned to the laying zone.
  • Laying area means the area on the laying screen belt 5 on which at least the largest part of the filaments 3 is deposited.
  • the extraction speeds in the suction regions 6, 7, 8, 9 are each independently adjustable.
  • the extraction speed in the main suction area 8 is higher than in the other suction areas 6, 7, 9.
  • the suction speed in the second suction area 7 is expediently higher than the suction speed in the first suction area 6.
  • Each suction area 6, 7, 8, 9 is more preferred Embodiment of the invention associated with its own (not shown) suction fan.
  • the suction speed for the respective suction area 6, 7, 8, 9 can be set separately at each suction fan and it is an independent control and / or regulation of the suction air flow in each suction area 6, 7, 8, 9 possible.
  • the individual extraction areas are separated by boundary walls 10 made of sheet metal.
  • the emerging filaments 3 and the flow direction of the blowing air 4 and also the flow direction of the sucked secondary air 11 can be seen.
  • the invention can be divided into different suction areas 6, 7, 8, 9 both the direction of Blas Kunststoff 4 and the direction of the secondary air 11 are influenced so that a very reliable and uniform storage of the filaments is possible and thus surprisingly homogeneous product properties can be achieved.
  • the invention located behind the Hauptabsaug Scheme 8 third suction 9 serves according to the invention for effective retention of the produced meltblown product on the Ablegesiebband 5.
  • the invention is based on the finding that without this third Absaug Scheme 9 an undesirable impairment of the stored meltblown product by the with high speed exiting blowing air can be sucked secondary air.
  • the subdivision according to the invention into the suction regions 6, 7, 8, 9 minimizes disturbing and undesired influences of the air currents.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Moulding By Coating Moulds (AREA)

Description

Die Erfindung betrifft eine Meltblown-Anlage zur Herstellung von Meltblown-Produkten, mit einem Filamente abgebenden Düsenkopf, wobei unterhalb des Düsenkopfes ein kontinuierlich bewegbares Ablegesiebband angeordnet ist, auf dem die Filamente zum Meltblown-Produkt ablegbar sind und wobei an dem Ablegesiebband eine Saugeinrichtung zum Ansaugen von Luft durch das Ablegesiebband vorgesehen ist. - In einer Meltblown-Anlage bzw. beim Meltblown-Verfahren wird die aus dem Düsenkopf austretende Polymerschmelze von einem Blasluftstrom beaufschlagt. Dadurch werden aus der Schmelze Polymerfasern gebildet, die dann zum Meltblown-Produkt auf dem Ablegesiebband abgelegt werden.The invention relates to a meltblown plant for the production of meltblown products, with a filament dispensing nozzle head, wherein below the nozzle head a continuously movable Ablegesiebband is arranged on which the filaments for Meltblown product can be stored and wherein the Ablegesiebband a suction device for suction is provided by air through the Ablegesiebband. - In a meltblown plant or in the meltblown process, the polymer melt emerging from the nozzle head is subjected to a blast air flow. As a result, polymer fibers are formed from the melt, which are then deposited to the meltblown product on the Ablegesiebband.

Bei den aus der Praxis bekannten Meltblown-Anlagen der eingangs genannten Art, von denen die Erfindung ausgeht, ist lediglich ein einziger Absaugkanal bzw. Absaugbereich in der Ablegezone der Filamente vorgesehen, dem ein unter dem Ablegesiebband angeordnetes Sauggebläse zugeordnet ist. Mit diesen bekannten Anlagen werden oftmals Meltblown-Produkte erhalten, die unerwünschte Unregelmäßigkeiten bzw. Inhomogenitäten aufweisen. Bei diesen bekannten Meltblown-Anlagen findet in der Absaugzone bzw. im Bereich des Ablegesiebbandes häufig ein mehr oder weniger starker Faserflug statt, der eine unkontrollierte Ablage der Fasern bedingt und somit Unregelmäßigkeiten im Meltblown-Produkt hervorruft. Diese Unregelmäßigkeiten betreffen insbesondere die Produktdicke, die Luftdurchlässigkeit und das Verhältnis Querfestigkeit/Längsfestigkeit der erzeugten Fasermatte sowie Ungleichmäßigkeiten in der Oberfläche des Meltblown-Produktes. Im Ergebnis lässt die Produktqualität der Meltblown-Produkte zu wünschen übrig.In the known from practice meltblown systems of the type mentioned, from which the invention proceeds, only a single suction channel or suction in the deposition zone of the filaments is provided, which is associated with a arranged under the Ablegesiebband suction fan. With these known systems meltblown products are often obtained which have undesirable irregularities or inhomogeneities. In these known meltblown systems, a more or less strong fiber fly often takes place in the extraction zone or in the region of the Ablegesiebbandes, which causes uncontrolled storage of the fibers and thus causes irregularities in the meltblown product. These irregularities relate in particular to the product thickness, the air permeability and the ratio transverse strength / longitudinal strength of the produced fiber mat, as well as irregularities in the surface of the fiber mat Meltblown product. As a result, the product quality of the meltblown products leaves something to be desired.

Demgegenüber liegt der Erfindung das technische Problem zugrunde, eine Meltblown-Anlage der eingangs genannten Art anzugeben, mit der Meltblown-Produkte hergestellt werden können, die sich durch Homogenität und Gleichmäßigkeit bezüglich ihrer Eigenschaften auszeichnen und insbesondere auch eine optimale Oberflächenqualität aufweisen. Es sollen vor allem Meltblown-Produkte hergestellt werden können, die eine gleichmäßige Produktdicke und ein konstantes Verhältnis Querfestigkeit/Längsfestigkeit aufweisen. Auch die Luftdurchlässigkeit soll an verschiedenen Stellen des Meltblown-Produktes möglichst gleichbleibend sein.In contrast, the invention, the technical problem underlying a meltblown plant of the type mentioned above can be made with the meltblown products that are characterized by homogeneity and uniformity in terms of their properties and in particular also have an optimal surface quality. In particular, meltblown products should be able to be produced which have a uniform product thickness and a constant ratio between transverse strength and longitudinal strength. The air permeability should be as constant as possible at different points of the meltblown product.

Zur Lösung des vorgenannten technischen Problems lehrt die Erfindung eine Meltblown-Anlage der eingangs genannten Art, welche dadurch gekennzeichnet ist, dass das Ablegesiebband in seiner Längsrichtung mehrere voneinander getrennte Absaugbereiche aufweist, dass einer dieser Absaugbereiche ein der Ablegezone zugeordneter Hauptabsaugbereich ist und dass in den Absaugbereichen die Absauggeschwindigkeiten jeweils unabhängig voneinander einstellbar sind.To solve the above-mentioned technical problem, the invention teaches a meltblown plant of the type mentioned, which is characterized in that the reject screen has in its longitudinal direction a plurality of separate suction, that one of these Absaugbereiche is the Ablegezone associated Hauptabsaugbereich and that in the Absaugbereichen the suction speeds are each independently adjustable.

In Längsrichtung des Ablegesiebbandes meint in Förderrichtung bzw. Transportrichtung des Ablegesiebbandes. Die mehreren voneinander getrennten Absaugbereiche sind also in Förderrichtung bzw. Transportrichtung des Ablegesiebbandes hintereinander angeordnet. Mit dem Begriff Ablegezone ist der Bereich des Ablegesiebbandes gemeint, in dem der größte Teil der Filamente abgelegt wird bzw. in dem alle oder fast alle Filamente abgelegt werden. In jedem Absaugbereich kann die Absauggeschwindigkeit jeweils separat und unabhängig von den anderen Absaugbereichen eingestellt werden. Absauggeschwindigkeit meint die Geschwindigkeit der durch das Ablegesiebband abgesaugten bzw. angesaugten Luft in m/s. Zweckmäßigerweise ist die Saugeinrichtung bzw. sind die Sauggebläse der Saugeinrichtung unterhalb des Ablegesiebbandes angeordnet.In the longitudinal direction of the Ablegesiebbandes means in the conveying direction or transport direction of Ablegesiebbandes. The plurality of separate suction areas are thus arranged one behind the other in the conveying direction or transport direction of the Ablegesiebbandes. By the term depositing zone is meant the area of the reject screen, in which most of the filaments are deposited or in which all or almost all filaments are deposited. In each extraction area, the extraction speed can be set separately and independently of the other extraction areas. Suction rate means the speed of the suctioned or sucked air in m / s. Appropriately, the suction device or the suction fan of the suction device is arranged below the Ablegesiebbandes.

Es liegt im Rahmen der Erfindung, dass der die Filamente abgebende Düsenkopf als Meltblown-Blaskopf ausgebildet ist. Es liegt weiterhin im Rahmen der Erfindung, dass der Düsenkopf der Meltblown-Anlage eine Vielzahl von in einer Reihe angeordneten Düsenbohrungen bzw. Düsenöffnungen für den Polymerschmelzeaustritt aufweist. Danach ist also nur eine einzige Reihe von Düsenöffnungen vorgesehen. Fernerhin weist die erfindungsgemäße Meltblown-Anlage vorzugsweise eine Längsdüse für den Austritt von temperierter Blasluft auf, mit welcher Blasluft die Polymerschmelze bzw. die austretenden Filamente beaufschlagt werden.It is within the scope of the invention that the nozzle head delivering the filaments is designed as a meltblown die. It is also within the scope of the invention that the nozzle head of the meltblown system has a plurality of nozzle bores or nozzle openings arranged in a row for the polymer melt outlet. After that, therefore, only a single row of nozzle openings is provided. Furthermore, the meltblown system according to the invention preferably has a longitudinal nozzle for the outlet of tempered blowing air, with which blowing air the polymer melt or the emerging filaments are acted upon.

Vorzugsweise sind zumindest drei voneinander getrennte Absaugbereiche ich Längsrichtung bzw. in Förderrichtung des Ablegesiebbandes hintereinander angeordnet. Einer dieser Absaugbereiche ist dabei der Hauptabsaugbereich. Nach sehr bevorzugter Ausführungsform, der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, sind vier voneinander getrennte Absaugbereiche vorgesehen und dabei ist ein erster Absaugbereich und ein zweiter Absaugbereich in Bezug auf die Förderrichtung des Ablegesiebbandes vor dem Hauptabsaugbereich angeordnet und dabei ist weiterhin ein dritter Absaugbereich in Förderrichtung des Ablegesiebbandes hinter dem Hauptabsaugbereich angeordnet. Diese Ausführungsform mit vier voneinander getrennten Absaugbereichen hat sich im Rahmen der Erfindung besonders bewährt.Preferably, at least three suction regions which are separate from one another are arranged in the longitudinal direction or in the conveying direction of the depositing screen belt one behind the other. One of these suction areas is the Hauptabsaugbereich. According to a very preferred embodiment, which is of very particular importance in the context of the invention, four separate suction areas are provided and a first suction area and a second suction area with respect to the conveying direction of the Ablegesiebbandes arranged in front of the Hauptabsaugbereich and it is still a third suction in the conveying direction of Ablegesiebbandes behind the Hauptabsaugbereich arranged. This embodiment with four separate suction regions has proven particularly useful in the context of the invention.

Es liegt im Rahmen der Erfindung, dass die Absauggeschwindigkeit im Hauptabsaugbereich höher ist als in den übrigen Absaugbereichen. Bei der Ausführungsform mit vier voneinander getrennten Absaugbereichen ist also die Absauggeschwindigkeit im Hauptabsaugbereich höher als die Absauggeschwindigkeiten im ersten, im zweiten und im dritten Absaugbereich. Zweckmäßigerweise ist die Absauggeschwindigkeit im Hauptabsaugbereich mindestens doppelt so hoch wie die Absauggeschwindigkeit in jedem der weiteren Absaugbereiche. Vorzugsweise ist die Absauggeschwindigkeit im Hauptabsaugbereich mindestens doppelt so hoch wie die Absauggeschwindigkeit im ersten Absaugbereich bzw. im zweiten Absaugbereich. Vorzugsweise ist weiterhin die Absauggeschwindigkeit im Hauptabsaugbereich mindestens doppelt so hoch wie die Absauggeschwindigkeit im dritten Absaugbereich.It is within the scope of the invention that the extraction speed in the main suction area is higher than in the other extraction areas. In the embodiment with four separate suction regions, therefore, the suction speed in the main suction area is higher than the suction speeds in the first, in the second and in the third suction area. Conveniently, the speed of extraction in the main suction area is at least twice as high as the extraction speed in each of the further suction areas. The extraction speed in the main suction area is preferably at least twice as high as the extraction speed in the first suction area or in the second suction area. Preferably, furthermore, the extraction speed in the main suction area is at least twice as high as the extraction speed in the third suction area.

Nach bevorzugter Ausführungsform der Erfindung ist jedem Absaugbereich ein eigenes Sauggebläse zugeordnet. Bei dieser Ausführungsform weist die Saugeinrichtung der Meltblown-Anlage also mehrere Sauggebläse auf. Die Sauggeschwindigkeit kann an jedem Sauggebläse für jeden Absaugbereich separat eingestellt werden. Es findet also eine unabhängige Regulierung des Absaugluftstromes in jedem Absaugbereich statt. Die abgesaugten Volumenströme können völlig unabhängig voneinander eingestellt werden. Die Einstellung kann dabei mit der Maßgabe vorgenommen werden, dass die Absaugleistung im Hauptabsaugbereich doppelt so groß ist wie in jedem der anderen Absaugbereiche.According to a preferred embodiment of the invention, each suction area is assigned its own suction fan. In this embodiment, the suction device of the meltblown system thus comprises a plurality of suction fans. The suction speed can be set separately for each suction fan on each suction fan. Thus, there is an independent regulation of the suction air flow in each extraction area. The aspirated volume flows can be set completely independently of each other. The setting can be made with the proviso that the suction in the Hauptabsaugbereich twice as large as in each of the other Absaugbereiche.

Zweckmäßigerweise sind die einzelnen Absaugbereiche durch Begrenzungswände aus Metallblech voneinander getrennt. Dabei handelt es sich vorzugsweise um vertikal orientierte Metallbleche. Vertikal meint hier auch im Wesentlichen vertikal.Advantageously, the individual suction areas are separated by boundary walls made of sheet metal. These are preferably vertically oriented metal sheets. Vertical also means essentially vertical.

Der Erfindung liegt die Erkenntnis zugrunde, dass mit der erfindungsgemäßen Meltblown-Anlage die Ablage eines Meltblown-Produktes bzw. einer Vliesbahn optimal und funktionssicher gesteuert werden kann. Mit der erfindungsgemäßen Ausgestaltung kann ein unerwünschter Faserflug im Bereich des Ablegesiebbandes ausgeschlossen bzw. effektiv reduziert werden. Durch Verwirklichung der verschiedenen Absaugbereiche kann eine sehr gleichmäßige Fadenablage erzielt werden und Inhomogenitäten im abgelegten Meltblown-Produkt können überraschend weitgehend minimiert werden. Störende Dickstellen oder Dünnstellen im hergestellten Meltblown-Produkt werden nicht beobachtet. Auch störende Inhomogenitäten bezüglich der Luftdurchlässigkeit des Vlieses oder bezüglich des Verhältnisses Querfestigkeit/Längsfestigkeit können ausgeschlossen werden. Im Übrigen kann der Hauptabsaugbereich gegenüber dem bei den aus der Praxis bekannten Meltblown-Anlagen vorhandenen Absaugbereich in Bezug auf die Längsrichtung bzw. Transportrichtung des Ablegesiebbandes kürzer ausgeführt werden. Dadurch ergibt sich eine vorteilhafte Energieeinsparung, weil der insgesamt abgesaugte Luftvolumenstrom reduziert werden kann. Ohne die erfindungsgemäße Unterteilung in verschiedene Absaugbereiche müsste der einzige Absaugbereich in der Ablegezone, der eine hohe Absauggeschwindigkeit benötigt, in Transportrichtung des Ablegesiebbandes breiter ausgeführt werden. Bei den bekannten Meltblown-Anlagen wird deshalb ein unnötig hoher Volumenstrom abgesaugt, was wiederum einen hohen Energieaufwand bedeutet.The invention is based on the finding that the storage of a meltblown product or a nonwoven web can be optimally and reliably controlled with the meltblown system according to the invention. With the embodiment according to the invention, an undesired fiber fly in the region of the Ablegesiebbandes can be excluded or effectively reduced. By implementing the various suction areas, a very uniform yarn placement can be achieved and inhomogeneities in the stored meltblown product can be surprisingly minimized to a large extent. Disturbing thick spots or thin spots in the produced meltblown product are not observed. Even disturbing inhomogeneities with respect to the air permeability of the web or with respect to the ratio transverse strength / longitudinal strength can be excluded. Incidentally, the main suction region can be made shorter than the suction region existing in the meltblown systems known from practice with respect to the longitudinal direction or transport direction of the deposition sieve belt. This results in an advantageous Energy saving, because the total extracted air flow can be reduced. Without the subdivision according to the invention into different suction regions, the single suction region in the laying zone, which requires a high suction speed, would have to be made wider in the transport direction of the laying sieve belt. In the known meltblown systems, therefore, an unnecessarily high volume flow is sucked off, which in turn means a high expenditure of energy.

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

Fig. 1
eine Seitenansicht einer erfindungsgemäßen Meltblown-Anlage und
Fig. 2
den vergrößerten Ausschnitt A aus 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 side view of a meltblown plant according to the invention and
Fig. 2
the enlarged section A of FIG. 1.

Die Figuren zeigen eine erfindungsgemäße Meltblown-Anlage zur Herstellung von Meltblown-Produkten, nämlich von Vliesbahnen. Die Meltblown-Anlage weist einen Düsenkopf 1 auf, aus dessen Düsenöffnungen 2 Filamente 3 extrudiert werden. Zweckmäßigerweise und im Ausführungsbeispiel weist der Düsenkopf 1 eine Reihe mit einer Mehrzahl von Düsenöffnungen 2 auf. Die Filamente 3 werden mit temperierter Blasluft 4 beaufschlagt, deren Strömungsrichtung in den Figuren durch entsprechende Pfeile dargestellt wird. Unterhalb des Düsenkopfes 1 ist ein kontinuierlich bewegbares Ablegesiebband 5 angeordnet, auf dem die Filamente 3 zur Meltblown-Vliesbahn ablegbar sind. Durch das Ablegesiebband 5 wird Luft gesaugt, so dass die Filamente 3 gleichsam auf das Ablegesiebband gesaugt werden.The figures show a meltblown plant according to the invention for the production of meltblown products, namely nonwoven webs. The meltblown system has a nozzle head 1, from whose nozzle openings 2 filaments 3 are extruded. Conveniently and in the exemplary embodiment, the nozzle head 1 has a row with a plurality of nozzle openings 2. The filaments 3 are acted upon by tempered blowing air 4, whose flow direction is represented in the figures by corresponding arrows. Below the nozzle head 1, a continuously movable Ablegesiebband 5 is arranged, on which the filaments 3 to the meltblown nonwoven web can be stored. Through the reject strainer 5 air is sucked, so that the filaments 3 are sucked onto the Ablegesiebband as it were.

Erfindungsgemäß weist das Ablegesiebband 5 vier voneinander getrennte Absaugbereiche 6, 7, 8, 9 auf. Einer dieser Absaugbereiche 6, 7, 8, 9 ist der der Ablegezone zugeordnete Hauptabsaugbereich 8. Ablegezone meint den Bereich auf dem Ablegesiebband 5 auf dem zumindest der größte Teil der Filamente 3 abgelegt wird. Erfindungsgemäß sind die Absauggeschwindigkeiten in den Absaugbereichen 6, 7, 8, 9 jeweils unabhängig voneinander einstellbar. Die Absauggeschwindigkeit im Hauptabsaugbereich 8 ist höher als in den übrigen Absaugbereichen 6, 7, 9. Im Übrigen ist die Absauggeschwindigkeit im zweiten Absaugbereich 7 zweckmäßigerweise höher als die Absauggeschwindigkeit im ersten Absaugbereich 6. - Jedem Absaugbereich 6, 7, 8, 9 ist nach bevorzugter Ausführungsform der Erfindung ein eigenes (nicht dargestelltes) Sauggebläse zugeordnet. Somit kann an jedem Sauggebläse die Sauggeschwindigkeit für den jeweiligen Absaugbereich 6, 7, 8, 9 separat eingestellt werden und es ist eine unabhängige Steuerung und/oder Regelung des Absaugluftstromes in jedem Absaugbereich 6, 7, 8, 9 möglich. Zweckmäßigerweise und im Ausführungsbeispiel sind die einzelnen Absaugbereiche durch Begrenzungswände 10 aus Metallblech voneinander getrennt.According to the invention, the Ablegesiebband 5 four separate suction areas 6, 7, 8, 9. One of these suction areas 6, 7, 8, 9 is the main suction area 8 assigned to the laying zone. Laying area means the area on the laying screen belt 5 on which at least the largest part of the filaments 3 is deposited. According to the invention, the extraction speeds in the suction regions 6, 7, 8, 9 are each independently adjustable. The extraction speed in the main suction area 8 is higher than in the other suction areas 6, 7, 9. Incidentally, the suction speed in the second suction area 7 is expediently higher than the suction speed in the first suction area 6. Each suction area 6, 7, 8, 9 is more preferred Embodiment of the invention associated with its own (not shown) suction fan. Thus, the suction speed for the respective suction area 6, 7, 8, 9 can be set separately at each suction fan and it is an independent control and / or regulation of the suction air flow in each suction area 6, 7, 8, 9 possible. Appropriately, and in the embodiment, the individual extraction areas are separated by boundary walls 10 made of sheet metal.

Insbesondere in Fig. 2 sind die austretenden Filamente 3 sowie die Strömungsrichtung der Blasluft 4 und auch die Strömungsrichtung der angesaugten Sekundärluft 11 erkennbar. Erfindungsgemäß kann durch die Aufteilung in verschiedene Absaugbereiche 6, 7, 8, 9 sowohl die Richtung der Blasluft 4 als auch die Richtung der Sekundärluft 11 so beeinflusst werden, dass eine sehr funktionssichere und gleichmäßige Ablage der Filamente möglich ist und somit überraschend homogene Produkteigenschaften erzielt werden können. Der hinter dem Hauptabsaugbereich 8 angeordnete dritte Absaugbereich 9 dient erfindungsgemäß zum effektiven Festhalten des erzeugten Meltblown-Produktes auf dem Ablegesiebband 5. Der Erfindung liegt die Erkenntnis zugrunde, dass ohne diesen dritten Absaugbereich 9 eine unerwünschte Beeinträchtigung des abgelegten Meltblown-Produktes durch die von der mit hoher Geschwindigkeit austretenden Blasluft angesaugte Sekundärluft erfolgen kann. Die erfindungsgemäße Unterteilung in die Absaugbereiche 6, 7, 8, 9 minimiert störende und unerwünschte Einflüsse der Luftströmungen.In particular, in Fig. 2, the emerging filaments 3 and the flow direction of the blowing air 4 and also the flow direction of the sucked secondary air 11 can be seen. According to the invention can be divided into different suction areas 6, 7, 8, 9 both the direction of Blasluft 4 and the direction of the secondary air 11 are influenced so that a very reliable and uniform storage of the filaments is possible and thus surprisingly homogeneous product properties can be achieved. The invention located behind the Hauptabsaugbereich 8 third suction 9 serves according to the invention for effective retention of the produced meltblown product on the Ablegesiebband 5. The invention is based on the finding that without this third Absaugbereich 9 an undesirable impairment of the stored meltblown product by the with high speed exiting blowing air can be sucked secondary air. The subdivision according to the invention into the suction regions 6, 7, 8, 9 minimizes disturbing and undesired influences of the air currents.

Claims (6)

  1. Meltblown apparatus for producing meltblown products with a nozzle head (1) dispensing a filament (3), a continuously movable collecting foraminous belt (5) on which the filaments (3) for the meltblown product may be deposited being arranged below the nozzle head (1), and a suction device for sucking air through the collecting foraminous belt (5) being provided at the collecting foraminous belt (5), characterised in that the collecting foraminous belt (5) has in its longitudinal direction a plurality of suction zones (6, 7, 8, 9) separated from one another, that one of these suction zones (6, 7, 8, 9) is a main suction zone (8) associated with the deposit zone, and that in the suction zones (6, 7, 8, 9) the suction speeds are in each case adjustable independently of one other.
  2. Meltblown apparatus according to Claim 1, characterised in that at least three suction zones separated from one another are provided.
  3. Meltblown apparatus according to Claim 2, characterised in that four suction zones (6, 7, 8, 9) separated from one another are provided, and that a first suction zone (6) and a second suction zone (7) are arranged in front of the main suction zone (8) with respect to the direction of conveyance of the collecting foraminous belt (5), and that a third suction zone (9) is arranged behind the main suction zone (8) in the direction of conveyance of the collecting foraminous belt (5).
  4. Meltblown apparatus according to any one of Claims 1 to 3, characterised in that the suction speed in the main suction zone (8) is higher than in the remaining suction zones (6, 7, 9).
  5. Meltblown apparatus according to any one of Claims 1 to 4, characterised in that each suction zone (6, 7, 8, 9) is associated with its own individual suction blower.
  6. Meltblown apparatus according to any one of Claims 1 to 5, characterised in that the individual suction zones (6, 7, 8, 9) are separated from one another by partition walls (10) of sheet metal.
EP02004616A 2002-02-28 2002-02-28 Meltblown apparatus Expired - Lifetime EP1340844B1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
DK02004616T DK1340844T3 (en) 2002-02-28 2002-02-28 Meltblown apparatus
EP02004616A EP1340844B1 (en) 2002-02-28 2002-02-28 Meltblown apparatus
DE50210973T DE50210973D1 (en) 2002-02-28 2002-02-28 Meltblown system
ES02004616T ES2290209T3 (en) 2002-02-28 2002-02-28 INSTALLATION OF FOUNDATION BY BLOW.
AT02004616T ATE374268T1 (en) 2002-02-28 2002-02-28 MELTBLOWN PLANT
ARP030100554A AR038538A1 (en) 2002-02-28 2003-02-20 MELTBLOWN INSTALLATION
MXPA03001671A MXPA03001671A (en) 2002-02-28 2003-02-25 Meltblown apparatus.
BRPI0300319-1A BR0300319B1 (en) 2002-02-28 2003-02-26 melt blown arrangement.
IL154630A IL154630A (en) 2002-02-28 2003-02-26 " melt blown" arrangement for an apparatus for producing non-woven webs
CA002420517A CA2420517C (en) 2002-02-28 2003-02-27 Melt blown arrangement
US10/375,894 US7004738B2 (en) 2002-02-28 2003-02-27 Apparatus for producing melt-blown webs
KR1020030012232A KR100897315B1 (en) 2002-02-28 2003-02-27 Melt blown arrangement
MYPI20030693A MY138472A (en) 2002-02-28 2003-02-27 Apparatus for producing melt-blown webs
JP2003050816A JP4229724B2 (en) 2002-02-28 2003-02-27 Melt blow equipment
CNB031067832A CN1261232C (en) 2002-02-28 2003-02-28 Smelting and spray device
SA03240174A SA03240174B1 (en) 2002-02-28 2003-06-29 A device for producing melt-blown webs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02004616A EP1340844B1 (en) 2002-02-28 2002-02-28 Meltblown apparatus

Publications (2)

Publication Number Publication Date
EP1340844A1 EP1340844A1 (en) 2003-09-03
EP1340844B1 true EP1340844B1 (en) 2007-09-26

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ID=27675666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02004616A Expired - Lifetime EP1340844B1 (en) 2002-02-28 2002-02-28 Meltblown apparatus

Country Status (16)

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US (1) US7004738B2 (en)
EP (1) EP1340844B1 (en)
JP (1) JP4229724B2 (en)
KR (1) KR100897315B1 (en)
CN (1) CN1261232C (en)
AR (1) AR038538A1 (en)
AT (1) ATE374268T1 (en)
BR (1) BR0300319B1 (en)
CA (1) CA2420517C (en)
DE (1) DE50210973D1 (en)
DK (1) DK1340844T3 (en)
ES (1) ES2290209T3 (en)
IL (1) IL154630A (en)
MX (1) MXPA03001671A (en)
MY (1) MY138472A (en)
SA (1) SA03240174B1 (en)

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US6499982B2 (en) 2000-12-28 2002-12-31 Nordson Corporation Air management system for the manufacture of nonwoven webs and laminates
US6799957B2 (en) 2002-02-07 2004-10-05 Nordson Corporation Forming system for the manufacture of thermoplastic nonwoven webs and laminates
ES2298302T5 (en) * 2002-02-28 2011-02-24 REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK INSTALLATION FOR THE CONTINUOUS MANUFACTURE OF A SPINNING BAND.
WO2005093138A1 (en) * 2004-03-26 2005-10-06 Saurer Gmbh & Co. Kg Method and device for melt spinning fine synthetic fibres
US7316552B2 (en) * 2004-12-23 2008-01-08 Kimberly-Clark Worldwide, Inc. Low turbulence die assembly for meltblowing apparatus
DK1930492T3 (en) * 2006-12-06 2011-01-10 Reifenhaeuser Gmbh & Co Kg Method and apparatus for making a spinning nonwoven fabric
EP1939334B1 (en) * 2006-12-15 2010-02-24 FARE' S.p.A. Apparatus and process for the production of a spunbond web
WO2008092749A1 (en) * 2007-01-31 2008-08-07 Oerlikon Textile Gmbh & Co. Kg Method and apparatus for drawing and depositing a plurality of fibers to form a non-woven
WO2012052535A1 (en) * 2010-10-21 2012-04-26 Hi Tech Textile Holding Gmbh Method and apparatus for producing a composite nonwoven
US10240257B2 (en) * 2014-09-15 2019-03-26 Clarcor Inc. Systems and methods for controlled laydown of materials in a fiber production system
EP3714086A4 (en) 2017-11-22 2021-10-06 Extrusion Group, LLC Meltblown die tip assembly and method
TWI827634B (en) * 2018-07-17 2024-01-01 奧地利商蘭仁股份有限公司 A method and device for the separation of solvent from process air in the production of spundbond fabrics
CN115434077B (en) * 2018-11-30 2023-12-29 宝洁公司 Method for producing throughflow bonded nonwoven webs
WO2020232928A1 (en) * 2019-05-22 2020-11-26 江苏亿茂滤材有限公司 Centrifugal spinning apparatus and planar receiving-type centrifugal spinning automatic production device
ES2886885T3 (en) 2019-07-30 2021-12-21 Reifenhaeuser Masch Device and method for the manufacture of a nonwoven material from fibers

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DE3400847C1 (en) * 1984-01-12 1985-08-29 Fa. Carl Freudenberg, 6940 Weinheim Process for the production of spunbonded nonwovens from aerodynamically stretched threads
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DE19913162C1 (en) * 1999-03-24 2000-11-09 Reifenhaeuser Masch Thermoplastic polymer fiber fleece production apparatus comprises melt-blown fiber spinneret above machine with endless screen on which random fiber bundle is laid down as fleece by smoothing surfaces
DE19940333B4 (en) * 1999-08-25 2004-03-25 Reifenhäuser GmbH & Co Maschinenfabrik Plant for the production of a spunbonded nonwoven web from plastic filaments
US6499982B2 (en) * 2000-12-28 2002-12-31 Nordson Corporation Air management system for the manufacture of nonwoven webs and laminates
ES2298302T5 (en) * 2002-02-28 2011-02-24 REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK INSTALLATION FOR THE CONTINUOUS MANUFACTURE OF A SPINNING BAND.

Also Published As

Publication number Publication date
MY138472A (en) 2009-06-30
MXPA03001671A (en) 2005-03-07
KR20030071544A (en) 2003-09-03
EP1340844A1 (en) 2003-09-03
SA03240174B1 (en) 2006-11-25
IL154630A (en) 2007-06-17
BR0300319A (en) 2004-09-08
CN1261232C (en) 2006-06-28
JP4229724B2 (en) 2009-02-25
US20040009251A1 (en) 2004-01-15
US7004738B2 (en) 2006-02-28
DE50210973D1 (en) 2007-11-08
CN1440840A (en) 2003-09-10
CA2420517A1 (en) 2003-08-28
ES2290209T3 (en) 2008-02-16
CA2420517C (en) 2006-08-01
IL154630A0 (en) 2003-09-17
AR038538A1 (en) 2005-01-19
ATE374268T1 (en) 2007-10-15
KR100897315B1 (en) 2009-05-14
BR0300319B1 (en) 2012-12-25
JP2004003079A (en) 2004-01-08
DK1340844T3 (en) 2007-11-12

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