EP2017206B1 - Method for manufacturing a spunbond web - Google Patents

Method for manufacturing a spunbond web Download PDF

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Publication number
EP2017206B1
EP2017206B1 EP07012794.9A EP07012794A EP2017206B1 EP 2017206 B1 EP2017206 B1 EP 2017206B1 EP 07012794 A EP07012794 A EP 07012794A EP 2017206 B1 EP2017206 B1 EP 2017206B1
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EP
European Patent Office
Prior art keywords
roller
profiling
nonwoven web
profiled
transfer roller
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.)
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Application number
EP07012794.9A
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German (de)
French (fr)
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EP2017206A1 (en
Inventor
Walter Kühn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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.)
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Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to DK07012794.9T priority Critical patent/DK2017206T3/en
Priority to EP07012794.9A priority patent/EP2017206B1/en
Priority to ES07012794.9T priority patent/ES2507099T3/en
Priority to CN2008101317742A priority patent/CN101333729B/en
Priority to US12/147,562 priority patent/US7849902B2/en
Publication of EP2017206A1 publication Critical patent/EP2017206A1/en
Application granted granted Critical
Publication of EP2017206B1 publication Critical patent/EP2017206B1/en
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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
    • 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
    • D04H3/14—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 yarns or filaments produced by welding

Definitions

  • the invention relates to a device for producing a spunbonded nonwoven web with a Ablegesiebband on which fibers can be stored to the nonwoven web.
  • the fibers are in particular fibers of thermoplastic material and preferably filaments or continuous filaments made of thermoplastic material.
  • Under the Ablegesiebband is usually and preferably a suction device, with the air in the storage area of the fibers is sucked through the Ablegesiebband.
  • the reject screen belt is normally passed over a plurality of rollers and thus results in contact between the roller surfaces and the screen belt.
  • a part of the fibers through the Ablegesiebband ie sucked between the warp and weft threads of Ablegesiebbandes.
  • shooters One speaks of so-called "shooters”.
  • the known devices have in the transfer region of the nonwoven web to a transfer roller, which is usually wrapped by the wire belt with a relatively large angle of wrap. In this transfer region, the nonwoven web is usually transferred from the wire to a calender, in which the nonwoven web is fed.
  • the invention teaches a device for producing a spunbonded nonwoven web with a reject screen on which fibers can be deposited to the nonwoven web, wherein the reject screen is guided over a roller and wherein the roller surface of the roller is profiled with the proviso that the reject screen is only in contact with the profiling maxima of the roller surface.
  • fibers / filaments of thermoplastic material are deposited on the Ablegesiebband.
  • the fibers are continuous filaments.
  • the fibers / filaments are cooled before being deposited on the Ablegesiebband and stretched or aerodynamically stretched.
  • the fibers / filaments are passed through at least one diffuser before depositing on the Ablegesiebband.
  • the roller profiled in accordance with the invention is designed as a transfer roller for the nonwoven web.
  • the transfer roller means that the nonwoven web moved via the transfer roller is transferred in the conveying direction behind the transfer roller to a processing device for the nonwoven web or to a further conveying device (conveyor belt, screen belt or the like).
  • the transfer roller surface of the transfer roller is profiled or provided with the Profiltechniksmaxima and Profiltechniksminima.
  • the transfer roller is at the same time a drive roller for driving the depositing screen belt.
  • the profiled roller or the profiled transfer roller is set up to transfer the nonwoven web to a calender.
  • the nonwoven web is fed after its movement on the transfer roller in the conveying direction behind the transfer roller of a calender or fed between two calender rolls of a calender.
  • the reject screen belt wraps around the roller, preferably the transfer roller, with a wrap angle of at least 70 °, preferably of at least 90 ° and very preferably of at least 120 °.
  • the Ablegesiebband wraps the present invention profiled transfer roller with a wrap angle of 125 ° to 145 °, for example, with a wrap angle of 135 ° or of about 135 °.
  • at least 70%, preferably at least 80% and particularly preferably at least 90% of the roll surface is profiled.
  • the said percentage surface area of the roller is then provided with the profiling maxima and the profiling minima, which are arranged alternately on the roller surface.
  • a regular distribution of the profiling maxima and profiling minima on the roll surface is provided.
  • a particularly preferred embodiment of the invention is characterized in that the profiling of the roll surface is in the form of circumferential grooves and webs over the circumference of the roll. The webs then form the profiling maxima and the grooves form the profiling minima.
  • this recommended embodiment of the invention as it were linear contact zones between the roller and the Ablegesiebband realized.
  • a preferred embodiment of the invention is characterized in that the position of the contact points of the Ablegesiebbandes with the roller during movement of the Ablegesiebbandes or during rotation of the roller due to the profiling of the roller continuously changes. It is also within the scope of the invention that the position of these contact points changes discontinuously due to the profiling of the roller.
  • the profiling is formed in the form of at least one thread. The aforementioned webs (Profil michsmaxima) and grooves (Profil michmaschinesminima) are then so part of a thread with a certain slope. Due to the pitch of the thread, the contact points between the roll surface and Ablegesiebband migrate continuously in an advantageous manner.
  • each thread extends from the roll center (with respect to the longitudinal extent of the roll) to a front end of the roll.
  • the first thread is right-handed and the second thread formed left-handed.
  • the webs and grooves do not rotate over the entire circumference of the roller. In that regard, a discontinuous groove formation in the roll surface is possible.
  • the depth t of the profiling minima or the depth t of the grooves is 0.05 to 1.0 mm, preferably 0.05 to 0.6 mm and preferably 0.1 to 0.3 mm.
  • the profiling minima or grooves provided on a roll can also have different depths t or the depth t of a profiling minimum or a groove can change along the profiling minimum or along the groove, in particular change continuously.
  • a particularly preferred embodiment of the invention is characterized in that the profiled roller (macro-profiling) additionally has a micro-profiling on its surface.
  • the profiling maxima of the profiled or macro-profiled roll surface preferably additionally have the microprofiling on their surface.
  • the surfaces coming into contact with the depositing screen belt are micro-profiled by the webs, which run at least partially over the circumference of the roller.
  • the roll surface or the surfaces of the profiling maxima are micro-profiled with the proviso that arise only selective contact areas for the Ablegesiebband.
  • the micro-profiling is realized in the form of a globular surface topography.
  • the Micro profiling of the roll surface or the Profiltechniksmaximaober Assembly produced by thermal spraying or electroplating. It is within the scope of the invention that the microprofiling maxima of the microprofile have convexly outwardly curved surfaces. According to a preferred embodiment, the surfaces of the microprofiling maxima are spherical and / or ellipsoidal in shape.
  • the inventive design of the roller, preferably transfer roller, the known from the prior art disadvantages can be effectively avoided.
  • the invention is based on the finding that a contact reduction or contact minimization between Ablegesiebband and roller leads to the solution of the technical problem of the invention. - As already explained above, when depositing the fibers on the Ablegesiebband a clearly visible amount of fibers through the Ablegesiebband or between the warp and weft threads of Ablegesiebbandes sucked through (shooter).
  • a transfer roller is provided, which diverts the Ablegesiebband immediately in front of a calender with a wrap angle of about 135 °. The nonwoven web is transferred here to the calender or to the calender rolls.
  • the slotted filaments are clamped in the contact zone between transfer roller surface and Ablegesiebband and pulled opposite to the conveying direction.
  • the nonwoven web is pulled in by the calender rolls and conveyed in the conveying direction. If it fails to pull the collapsed and clamped filaments out of the wire, the filaments break off and the result is the already explained fiber pulp ("snowflake").
  • the torn-off fibers which are not removed as a "snowflake” and thus remain between the warp and weft threads of the wire belt, are pressed by the rolls of the wire belt machine into and onto the lay-off wire belt to form traps for the nonwoven web on the laydown wire belt.
  • the roll preferably the transfer roll
  • profiling macro-profiling
  • a very particularly preferred embodiment which has proven particularly useful in this connection, is characterized in that the surfaces of the profiling maxima (the macroprofiling) are additionally micro-profiled.
  • nonwoven webs can be produced with remarkably increased quality by the inventive design of the roller / transfer roller.
  • measures according to the invention can be implemented with relatively little effort and cost. It is also no problem to equip existing systems with the rollers / transfer rollers according to the invention.
  • the Fig. 1 shows a device for producing a spunbonded nonwoven fabric with a Ablegesiebband 1, on the fibers 2 are made of thermoplastic material to a nonwoven web 3 can be stored.
  • the fibers 2 are preferably and in the exemplary embodiment endless filaments.
  • the Ablegesiebband 1 is guided over a roller or transfer roller 4 and wraps around this transfer roller 4 with a wrap angle of about 135 °.
  • the nonwoven web 3 is transferred to a calender 5 or fed between two calender rolls 6, 7.
  • the roll surface of the transfer roll 4 is provided with a profiling (macroprofiling), which consists of profiling maxima and profiling minima.
  • the guided over the transfer roller 4 Ablegesiebband 1 is only with Profiltechniksmaxima the roll surface in touching contact.
  • the profiling (macro-profiling) of the roll surface in the form of grooves 8 (Profil michsminima) and webs 9 (Profil michsmaxima) is formed, which preferably and in the embodiment over the circumference of the transfer roller 4 rotate.
  • Fig. 3 are shown in an enlarged section, the warp threads 10 of the Ablegesiebbandes 1 above the macro-profiled with grooves 8 and webs 9 roller surface of the transfer roller 4. Below the warp threads 10 are sucked through the Ablegesiebband 1 or slotted fibers 2 recognizable. Due to the macroprofiling of the roll surface with grooves 8 and webs 9, only a portion of the slotted filaments 2 between Ablegesiebband 1 and transfer roller 4 is clamped, namely only in the region of the webs 9. In the Fig. 3 is also recognizable that the Diameter of the filaments 2 is substantially less than the diameter of the warp threads 10 of the Ablegesiebbandes. 1
  • the profiling (macro-profiling) of the transfer roller 4 in the form of two threads (11, 12) is formed, each extending from the center of the transfer roller 4 to a front end of the transfer roller 4.
  • it is counter-rotating thread 11, 12.
  • the thread 11 is formed in the embodiment left-handed and the thread 12 is formed right-handed. Due to the thread-like design or due to the slope of the profiling the slotted filaments 2 are only temporarily clamped between Ablegesiebband 1 and webs 9.
  • the position of the contact points of the Ablegesiebbandes 1 with the transfer roller 4 changes during movement of the Ablegesiebbandes 1 or during rotation of the transfer roller 4 so continuously.
  • the collapsed filaments 2 come out of the entrapment, they can be further conveyed by the train of calender rolls 6, 7 with the remaining nonwoven web 3. In this way, a tearing off of the filaments 2 which have fallen through and thus the disadvantageous "snowflight" can be avoided very effectively.
  • the surfaces of the Profiltechniksmaxima the profiling are additionally provided with a micro-profiling 13.
  • the surfaces of the webs 9 have such a microprofiling.
  • the microprofiling corresponds to a globular surface topography.
  • the surfaces of the microprofiling maxima 14 are expediently spherical and / or ellipsoidal in shape.
  • the micro-profiling of the web surfaces can be produced for example by thermal spraying or electroplating.

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung einer Spinnvliesbahn mit einem Ablegesiebband, auf dem Fasern zu der Vliesbahn ablegbar sind. - Bei den Fasern handelt es sich insbesondere um Fasern aus thermoplastischem Kunststoff und vorzugsweise um Filamente bzw. Endlosfilamente aus thermoplastischem Kunststoff. Unter dem Ablegesiebband befindet sich in der Regel und vorzugsweise eine Absaugeinrichtung, mit der im Ablagebereich der Fasern Luft durch das Ablegesiebband gesaugt wird.The invention relates to a device for producing a spunbonded nonwoven web with a Ablegesiebband on which fibers can be stored to the nonwoven web. - The fibers are in particular fibers of thermoplastic material and preferably filaments or continuous filaments made of thermoplastic material. Under the Ablegesiebband is usually and preferably a suction device, with the air in the storage area of the fibers is sucked through the Ablegesiebband.

Vorrichtungen der eingangs beschriebenen Art sind aus der Praxis in verschiedenen Ausführungsformen bekannt. Das Ablegesiebband wird normalerweise über eine Mehrzahl von Walzen geführt und insoweit resultiert ein Kontakt zwischen den Walzenoberflächen und dem Siebband. Beim Ablegen der Fasern auf dem Ablegesiebband wird ein Teil der Fasern durch das Ablegesiebband, d. h. zwischen den Kett- und Schussfäden des Ablegesiebbandes gesaugt. Man spricht von sog. "Durchschießern". Die bekannten Vorrichtungen weisen im Übergabebereich der Vliesbahn eine Übergabewalze auf, die von dem Siebband normalerweise mit relativ großem Umschlingungswinkel umschlungen ist. In diesem Übergabebereich wird die Vliesbahn in der Regel von dem Siebband an einen Kalander übergeben, in den die Vliesbahn eingezogen wird. Aufgrund der entsprechenden Fortbewegung der Vliesbahn kommt es zu einem Abreißen von durchgeschossenen Fasern und die abgerissenen Fasern können sich als Fasermüll frei im Raum bewegen (sog. "Schneeflug"). Die zwischen den Kett- und Schussfäden des Ablegesiebbandes verbleibenden Fasern werden aufgrund der Wechselwirkung des Ablegesiebbandes mit den Walzen der Siebbandmaschine in und an das Ablegesiebband gepresst und bilden so unerwünschte Haftstellen für die Vliesbahn auf dem Ablegesiebband. Durch diese Verschmutzung des Siebbandes wird die Qualität der hergestellten Spinnvliese negativ beeinflusst. Demgegenüber liegt die Erfindung das technische Problem zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, mit der die vorgenannten Nachteile vermieden werden können und mit der insbesondere der unerwünschte Fasermüll bzw. "Schneeflug" sowie die unerwünschten Verschmutzungen des Siebbandes vermieden werden können.Devices of the type described above are known from practice in various embodiments. The reject screen belt is normally passed over a plurality of rollers and thus results in contact between the roller surfaces and the screen belt. When depositing the fibers on the Ablegesiebband a part of the fibers through the Ablegesiebband, ie sucked between the warp and weft threads of Ablegesiebbandes. One speaks of so-called "shooters". The known devices have in the transfer region of the nonwoven web to a transfer roller, which is usually wrapped by the wire belt with a relatively large angle of wrap. In this transfer region, the nonwoven web is usually transferred from the wire to a calender, in which the nonwoven web is fed. Due to the corresponding movement of the nonwoven web, there is a tearing of shunted fibers and the torn off fibers can move freely as fiber waste in space (so-called "snowfall"). The remaining between the warp and weft threads of Ablegesiebbandes fibers are pressed due to the interaction of Ablegesiebbandes with the rollers of the wire machine in and on the Ablegesiebband and thus form undesirable traps for the nonwoven web on the Ablegesiebband. This contamination of the screen belt, the quality of the spunbonded fabric produced is adversely affected. In contrast, the invention, the technical problem underlying a device of the type mentioned, with the aforementioned disadvantages can be avoided and with the particular unwanted fiber waste or "snowfall" and the unwanted contamination of the wire can be avoided.

Zur Lösung dieses technischen Problems lehrt die Erfindung eine Vorrichtung zur Herstellung einer Spinnvliesbahn mit einem Ablegesiebband, auf dem Fasern zu der Vliesbahn ablegbar sind,
wobei das Ablegesiebband über eine Walze geführt wird und wobei die Walzenoberfläche der Walze mit der Maßgabe profiliert ist, dass das Ablegesiebband jeweils lediglich mit den Profilierungsmaxima der Walzenoberfläche in Berührungskontakt steht.To solve this technical problem, the invention teaches a device for producing a spunbonded nonwoven web with a reject screen on which fibers can be deposited to the nonwoven web,
wherein the reject screen is guided over a roller and wherein the roller surface of the roller is profiled with the proviso that the reject screen is only in contact with the profiling maxima of the roller surface.

Es liegt im Rahmen der Erfindung, dass Fasern/Filamente aus thermoplastischem Kunststoff auf dem Ablegesiebband abgelegt werden. Nach einer Ausführungsform handelt es sich bei den Fasern um Endlosfilamente. Vorzugsweise werden die Fasern/Filamente vor dem Ablegen auf dem Ablegesiebband gekühlt und verstreckt bzw. aerodynamisch verstreckt. Zweckmäßigerweise werden die Fasern/Filamente vor der Ablage auf dem Ablegesiebband durch zumindest einen Diffusor geführt.It is within the scope of the invention that fibers / filaments of thermoplastic material are deposited on the Ablegesiebband. In one embodiment, the fibers are continuous filaments. Preferably, the fibers / filaments are cooled before being deposited on the Ablegesiebband and stretched or aerodynamically stretched. Conveniently, the fibers / filaments are passed through at least one diffuser before depositing on the Ablegesiebband.

Aufgrund der erfindungsgemäßen Profilierung der Walzenoberfläche befinden sich auf der Walzenoberfläche der Walze Profilierungsmaxima und Profilierungsminima. Das Ablegesiebband steht nur mit Teilbereichen dieser Walzenoberfläche in Kontakt, nämlich mit den Profilierungsmaxima.Due to the profiling of the roll surface according to the invention are on the roll surface of the roll Profilierungsmaxima and Profilierungsminima. The reject screen is only in contact with partial areas of this roller surface, namely with the profiling maxima.

Das Ablegesiebband wird in der Regel über mehrere Walzen bzw. Antriebswalzen geführt. Nach einer sehr bevorzugten Ausführungsform, der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, ist die erfindungsgemäß profilierte Walze als Übergabewalze für die Vliesbahn eingerichtet. Übergabewalze meint hier, dass die über die Übergabewalze bewegte Vliesbahn in Förderrichtung hinter der Übergabewalze an eine Bearbeitungsvorrichtung für die Vliesbahn oder an eine weitere Fördereinrichtung (Förderband, Siebband oder dgl.) übergeben wird. Nach sehr bevorzugter Ausführungsform der Erfindung ist also die Übergabewalzenoberfläche der Übergabewalze profiliert bzw. mit den Profilierungsmaxima und Profilierungsminima versehen. Zweckmäßigerweise handelt es sich bei der Übergabewalze gleichzeitig um eine Antriebswalze für den Antrieb des Ablegesiebbandes.The reject screen is usually guided over several rollers or drive rollers. According to a very preferred embodiment, which is of very particular importance in the context of the invention, the roller profiled in accordance with the invention is designed as a transfer roller for the nonwoven web. In this case, the transfer roller means that the nonwoven web moved via the transfer roller is transferred in the conveying direction behind the transfer roller to a processing device for the nonwoven web or to a further conveying device (conveyor belt, screen belt or the like). After a very preferred embodiment of the invention, therefore, the transfer roller surface of the transfer roller is profiled or provided with the Profilierungsmaxima and Profilierungsminima. Conveniently, the transfer roller is at the same time a drive roller for driving the depositing screen belt.

Nach ganz besonders bevorzugter Ausführungsform der Erfindung ist die profilierte Walze bzw. die profilierte Übergabewalze zur Übergabe der Vliesbahn an einen Kalander eingerichtet. Zweckmäßigerweise wird also die Vliesbahn nach ihrer Bewegung über die Übergabewalze in Förderrichtung hinter der Übergabewalze von einem Kalander eingezogen bzw. zwischen zwei Kalanderwalzen eines Kalanders eingezogen.According to a particularly preferred embodiment of the invention, the profiled roller or the profiled transfer roller is set up to transfer the nonwoven web to a calender. Conveniently, therefore, the nonwoven web is fed after its movement on the transfer roller in the conveying direction behind the transfer roller of a calender or fed between two calender rolls of a calender.

Es liegt im Rahmen der Erfindung, dass das Ablegesiebband die Walze, vorzugsweise die Übergabewalze, mit einem Umschlingungswinkel von mindestens 70°, vorzugsweise von mindestens 90° und sehr bevorzugt von mindestens 120° umschlingt. Nach besonders bevorzugter Ausführungsform der Erfindung umschlingt das Ablegesiebband die erfindungsgemäß profilierte Übergabewalze mit einem Umschlingungswinkel von 125° bis 145°, beispielsweise mit einem Umschlingungswinkel von 135° bzw. von etwa 135°. Es liegt fernerhin im Rahmen der Erfindung, dass zumindest 70 %, vorzugsweise zumindest 80 % und besonders bevorzugt zumindest 90 % der Walzenoberfläche profiliert ist. Der genannte prozentuale Oberflächenbereich der Walze ist dann also mit den Profilierungsmaxima und den Profilierungsminima versehen, die auf der Walzenoberfläche abwechselnd angeordnet sind. Gemäß einer Ausführungsform der Erfindung ist eine regelmäßige Verteilung der Profilierungsmaxima und Profilierungsminima auf der Walzenoberfläche vorgesehen.It is within the scope of the invention that the reject screen belt wraps around the roller, preferably the transfer roller, with a wrap angle of at least 70 °, preferably of at least 90 ° and very preferably of at least 120 °. According to a particularly preferred embodiment of the invention, the Ablegesiebband wraps the present invention profiled transfer roller with a wrap angle of 125 ° to 145 °, for example, with a wrap angle of 135 ° or of about 135 °. It is further within the scope of the invention that at least 70%, preferably at least 80% and particularly preferably at least 90% of the roll surface is profiled. The said percentage surface area of the roller is then provided with the profiling maxima and the profiling minima, which are arranged alternately on the roller surface. According to one embodiment of the invention, a regular distribution of the profiling maxima and profiling minima on the roll surface is provided.

Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass die Profilierung der Walzenoberfläche in Form von über den Walzenumfang umlaufenden Rillen und Stegen ausgebildet ist. Die Stege bilden dann die Profilierungsmaxima und die Rillen bilden die Profilierungsminima. Bei dieser empfohlenen Ausführungsform der Erfindung sind gleichsam linienförmige Kontaktzonen zwischen der Walze und dem Ablegesiebband verwirklicht.A particularly preferred embodiment of the invention is characterized in that the profiling of the roll surface is in the form of circumferential grooves and webs over the circumference of the roll. The webs then form the profiling maxima and the grooves form the profiling minima. In this recommended embodiment of the invention, as it were linear contact zones between the roller and the Ablegesiebband realized.

Eine bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass sich die Position der Kontaktstellen des Ablegesiebbandes mit der Walze bei Bewegung des Ablegesiebbandes bzw. bei Rotation der Walze aufgrund der Profilierung der Walze kontinuierlich ändert. Es liegt auch im Rahmen der Erfindung, dass sich die Position dieser Kontaktstellen aufgrund der Profilierung der Walze diskontinuierlich ändert. - Nach einer bevorzugten Ausführungsvariante ist die Profilierung in Form zumindest eines Gewindes ausgebildet. Die vorgenannten Stege (Profilierungsmaxima) und Rillen (Profilierungsminima) sind dann also Bestandteil eines Gewindes mit einer bestimmten Steigung. Aufgrund der Steigung des Gewindes wandern die Kontaktstellen zwischen Walzenoberfläche und Ablegesiebband in vorteilhafter Weise kontinuierlich. Gemäß einer empfohlenen Ausführungsform sind auf der Walze bzw. auf der profilierten Walzenoberfläche zwei Gewinde vorgesehen. Zweckmäßigerweise erstreckt sich jedes Gewinde (von der in Bezug auf die Längserstreckung der Walze) Walzenmitte bis zu einem Stirnende der Walze. Vorzugsweise ist dabei das erste Gewinde rechtsgängig und das zweite Gewinde linksgängig ausgebildet. - Es liegt im Übrigen auch im Rahmen der Erfindung, dass die Stege und Rillen nicht über den gesamten Umfang der Walze umlaufen. Insoweit ist auch eine diskontinuierliche Rillenausbildung in der Walzenoberfläche möglich.A preferred embodiment of the invention is characterized in that the position of the contact points of the Ablegesiebbandes with the roller during movement of the Ablegesiebbandes or during rotation of the roller due to the profiling of the roller continuously changes. It is also within the scope of the invention that the position of these contact points changes discontinuously due to the profiling of the roller. - According to a preferred embodiment, the profiling is formed in the form of at least one thread. The aforementioned webs (Profilierungsmaxima) and grooves (Profilierungsminima) are then so part of a thread with a certain slope. Due to the pitch of the thread, the contact points between the roll surface and Ablegesiebband migrate continuously in an advantageous manner. According to a recommended embodiment, two threads are provided on the roller or on the profiled roller surface. Conveniently, each thread extends from the roll center (with respect to the longitudinal extent of the roll) to a front end of the roll. Preferably, the first thread is right-handed and the second thread formed left-handed. - It is also in the context of the invention that the webs and grooves do not rotate over the entire circumference of the roller. In that regard, a discontinuous groove formation in the roll surface is possible.

Nach empfohlener Ausführungsvariante der Erfindung beträgt die Tiefe t der Profilierungsminima bzw. die Tiefe t der Rillen 0,05 bis 1,0 mm, vorzugsweise 0,05 bis 0,6 mm und bevorzugt 0,1 bis 0,3 mm. Die an einer Walze vorgesehenen Profilierungsminima bzw. Rillen können auch unterschiedliche Tiefen t aufweisen oder die Tiefe t eines Profilierungsminimums bzw. einer Rille kann sich entlang des Profilierungsminimums bzw. entlang der Rille ändern, insbesondere kontinuierlich ändern.According to the recommended embodiment of the invention, the depth t of the profiling minima or the depth t of the grooves is 0.05 to 1.0 mm, preferably 0.05 to 0.6 mm and preferably 0.1 to 0.3 mm. The profiling minima or grooves provided on a roll can also have different depths t or the depth t of a profiling minimum or a groove can change along the profiling minimum or along the groove, in particular change continuously.

Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass die profilierte Walze (Makroprofilierung) zusätzlich eine Mikroprofilierung an ihrer Oberfläche aufweist. Vorzugsweise weisen die Profilierungsmaxima der profilierten bzw. makroprofilierten Walzenoberfläche zusätzlich die Mikroprofilierung an ihrer Oberfläche auf. Zweckmäßigerweise sind die mit dem Ablegesiebband in Kontakt kommenden Oberflächen der zumindest teilweise über den Walzenumfang umlaufenden Stege mikroprofiliert. Vorzugsweise ist die Walzenoberfläche bzw. sind die Oberflächen der Profilierungsmaxima mit der Maßgabe mikroprofiliert, dass sich lediglich punktuelle Kontaktbereiche für das Ablegesiebband ergeben. Durch die Mikroprofilierung kann in vorteilhafter Weise eine Verringerung der Oberflächenfriktion um bis zu 50 % erzielt werden. Vorzugsweise wird die Mikroprofilierung in Form einer globularen Oberflächentopografie realisiert. Nach einer empfohlenen Ausführungsform der Erfindung wird die Mikroprofilierung der Walzenoberfläche bzw. der Profilierungsmaximaoberfläche durch thermisches Spritzen oder galvanisches Beschichten erzeugt. Es liegt im Rahmen der Erfindung, dass die Mikroprofilierungsmaxima der Mikroprofilierung konvex nach außen gekrümmte Oberflächen aufweisen. Nach einer bevorzugten Ausführungsform sind die Oberflächen der Mikroprofilierungsmaxima sphärisch und/oder ellipsoidförmig ausgebildet.A particularly preferred embodiment of the invention is characterized in that the profiled roller (macro-profiling) additionally has a micro-profiling on its surface. The profiling maxima of the profiled or macro-profiled roll surface preferably additionally have the microprofiling on their surface. Expediently, the surfaces coming into contact with the depositing screen belt are micro-profiled by the webs, which run at least partially over the circumference of the roller. Preferably, the roll surface or the surfaces of the profiling maxima are micro-profiled with the proviso that arise only selective contact areas for the Ablegesiebband. By microprofiling can be achieved by reducing the surface friction by up to 50% in an advantageous manner. Preferably, the micro-profiling is realized in the form of a globular surface topography. According to a recommended embodiment of the invention, the Micro profiling of the roll surface or the Profilierungsmaximaoberfläche produced by thermal spraying or electroplating. It is within the scope of the invention that the microprofiling maxima of the microprofile have convexly outwardly curved surfaces. According to a preferred embodiment, the surfaces of the microprofiling maxima are spherical and / or ellipsoidal in shape.

Durch die erfindungsgemäße Ausgestaltung der Walze, vorzugsweise Übergabewalze, können die eingangs aus dem Stand der Technik bekannten Nachteile effektiv vermieden werden. Der Erfindung liegt dabei die Erkenntnis zugrunde, dass eine Kontaktreduzierung bzw. Kontaktminimierung zwischen Ablegesiebband und Walze zur Lösung des erfindungsgemäßen technischen Problems führt. - Wie vorstehend bereits erläutert, wird beim Ablegen der Fasern auf dem Ablegesiebband eine deutlich sichtbare Menge der Fasern durch das Ablegesiebband bzw. zwischen den Kett- und Schussfäden des Ablegesiebbandes durchgesaugt (Durchschießer). Bei vielen bekannten Vorrichtungen ist eine Übergabewalze vorgesehen, die das Ablegesiebband unmittelbar vor einem Kalander mit einem Umschlingungswinkel von etwa 135° umleitet. Die Vliesbahn wird hier an den Kalander bzw. an die Kalanderwalzen übergeben. Die durchgeschossenen Filamente werden in der Kontaktzone zwischen Übergabewalzenoberfläche und Ablegesiebband eingeklemmt und entgegengesetzt zur Förderrichtung gezogen. Die Vliesbahn wird dagegen von den Kalanderwalzen eingezogen und in Förderrichtung befördert. Wenn es nicht gelingt, die durchgeschossenen und eingeklemmten Filamente aus dem Siebband zu ziehen, reißen die Filamente ab und es resultiert der oben bereits erläuterte Fasermüll ("Schneeflug"). Die abgerissenen Fasern, die nicht als "Schneeflug" entfernt werden und somit zwischen den Kett- und Schussfäden des Siebbandes verbleiben, werden von den Walzen der Siebbandmaschine in und an das Ablegesiebband gepresst, so dass sie Haftstellen für die Vliesbahn auf dem Ablegesiebband bilden. Wie oben bereits dargelegt, wird durch diese Verschmutzung des Ablegesiebbandes die Qualität der Vliesbahn negativ beeinträchtigt. - Der Erfindung liegt nun die Erkenntnis zugrunde, dass die vorstehend erläuterten Effekte und die damit verbundenen Nachteile vermieden werden können, wenn die Walze, vorzugsweise Übergabewalze, erfindungsgemäß profiliert wird. Besondere Bedeutung kommt dabei der Profilierung (Makroprofilierung) in Form von über zumindest einen Teil des Umfangs der Walze verlaufenden Stegen und Rillen zu. Eine ganz besonders bevorzugte Ausführungsform, die sich in diesem Zusammenhang besonders bewährt hat, ist dadurch gekennzeichnet, dass die Oberflächen der Profilierungsmaxima (der Makroprofilierung) zusätzlich mikroprofiliert sind. Es ist darauf hinzuweisen, dass durch die erfindungsgemäße Ausgestaltung der Walze/Übergabewalze Vliesbahnen mit beachtlich gesteigerter Qualität erzeugt werden können. Hervorzuheben ist auch, dass die erfindungsgemäßen Maßnahmen mit relativ geringem Aufwand und kostengünstig verwirklicht werden können. Es ist auch kein Problem, bereits bestehende Anlagen mit den erfindungsgemäßen Walzen/Übergabewalzen auszurüsten.The inventive design of the roller, preferably transfer roller, the known from the prior art disadvantages can be effectively avoided. The invention is based on the finding that a contact reduction or contact minimization between Ablegesiebband and roller leads to the solution of the technical problem of the invention. - As already explained above, when depositing the fibers on the Ablegesiebband a clearly visible amount of fibers through the Ablegesiebband or between the warp and weft threads of Ablegesiebbandes sucked through (shooter). In many known devices, a transfer roller is provided, which diverts the Ablegesiebband immediately in front of a calender with a wrap angle of about 135 °. The nonwoven web is transferred here to the calender or to the calender rolls. The slotted filaments are clamped in the contact zone between transfer roller surface and Ablegesiebband and pulled opposite to the conveying direction. By contrast, the nonwoven web is pulled in by the calender rolls and conveyed in the conveying direction. If it fails to pull the collapsed and clamped filaments out of the wire, the filaments break off and the result is the already explained fiber pulp ("snowflake"). The torn-off fibers, which are not removed as a "snowflake" and thus remain between the warp and weft threads of the wire belt, are pressed by the rolls of the wire belt machine into and onto the lay-off wire belt to form traps for the nonwoven web on the laydown wire belt. As already stated above, by this Fouling of the reject screen adversely affects the quality of the nonwoven web. The invention is based on the finding that the effects explained above and the associated disadvantages can be avoided if the roll, preferably the transfer roll, is profiled according to the invention. Particular importance is attached to profiling (macro-profiling) in the form of webs and grooves extending over at least part of the circumference of the roll. A very particularly preferred embodiment, which has proven particularly useful in this connection, is characterized in that the surfaces of the profiling maxima (the macroprofiling) are additionally micro-profiled. It should be noted that nonwoven webs can be produced with remarkably increased quality by the inventive design of the roller / transfer roller. It should also be emphasized that the measures according to the invention can be implemented with relatively little effort and cost. It is also no problem to equip existing systems with the rollers / transfer rollers according to the invention.

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

Fig. 1
eine schematisch vereinfachte Seitenansicht einer erfindungsgemäßen Vorrichtung,
Fig. 2
eine Draufsicht auf eine erfindungsgemäße Walze bzw. Übergabewalze,
Fig. 3
einen vergrößerten Ausschnitt aus dem Gegenstand der Fig. 2 und
Fig. 4
eine perspektivische Ansicht einer mikroprofilierten Walzenoberfläche.
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 schematically simplified side view of a device according to the invention,
Fig. 2
a top view of a roll according to the invention or transfer roller,
Fig. 3
an enlarged section of the subject of Fig. 2 and
Fig. 4
a perspective view of a micro-profiled roller surface.

Die Fig. 1 zeigt eine Vorrichtung zur Herstellung eines Spinnvlieses mit einem Ablegesiebband 1, auf dem Fasern 2 aus thermoplastischem Kunststoff zu einer Vliesbahn 3 ablegbar sind. Bei den Fasern 2 handelt es sich vorzugsweise und im Ausführungsbeispiel um Endlosfilamente. Das Ablegesiebband 1 wird über eine Walze bzw. Übergabewalze 4 geführt und umschlingt diese Übergabewalze 4 mit einem Umschlingungswinkel von etwa 135°. In Förderrichtung hinter der Übergabewalze 4 wird die Vliesbahn 3 an einen Kalander 5 übergeben bzw. zwischen zwei Kalanderwalzen 6, 7 eingezogen.The Fig. 1 shows a device for producing a spunbonded nonwoven fabric with a Ablegesiebband 1, on the fibers 2 are made of thermoplastic material to a nonwoven web 3 can be stored. The fibers 2 are preferably and in the exemplary embodiment endless filaments. The Ablegesiebband 1 is guided over a roller or transfer roller 4 and wraps around this transfer roller 4 with a wrap angle of about 135 °. In the conveying direction behind the transfer roller 4, the nonwoven web 3 is transferred to a calender 5 or fed between two calender rolls 6, 7.

Erfindungsgemäß ist die Walzenoberfläche der Übergabewalze 4 mit einer Profilierung (Makroprofilierung) versehen, die aus Profilierungsmaxima und Profilierungsminima besteht. Das über die Übergabewalze 4 geführte Ablegesiebband 1 steht lediglich mit Profilierungsmaxima der Walzenoberfläche in Berührungskontakt. Nach besonders bevorzugter Ausführungsform und im Ausführungsbeispiel ist die Profilierung (Makroprofilierung) der Walzenoberfläche in Form von Rillen 8 (Profilierungsminima) und Stegen 9 (Profilierungsmaxima) ausgebildet, die vorzugsweise und im Ausführungsbeispiel über den Umfang der Übergabewalze 4 umlaufen. Dadurch entstehen lediglich linienförmige Kontaktzonen zwischen Ablegesiebband 1 und Übergabewalze 4.According to the invention, the roll surface of the transfer roll 4 is provided with a profiling (macroprofiling), which consists of profiling maxima and profiling minima. The guided over the transfer roller 4 Ablegesiebband 1 is only with Profilierungsmaxima the roll surface in touching contact. According to a particularly preferred embodiment and in the embodiment, the profiling (macro-profiling) of the roll surface in the form of grooves 8 (Profilierungsminima) and webs 9 (Profilierungsmaxima) is formed, which preferably and in the embodiment over the circumference of the transfer roller 4 rotate. As a result, only linear contact zones between Ablegesiebband 1 and transfer roller 4.

In der Fig. 3 sind in einem vergrößerten Ausschnitt die Kettfäden 10 des Ablegesiebbandes 1 oberhalb der mit Rillen 8 und Stegen 9 makroprofilierten Walzenoberfläche der Übergabewalze 4 dargestellt. Unterhalb der Kettfäden 10 sind durch das Ablegesiebband 1 hindurchgesaugte bzw. durchgeschossene Fasern 2 erkennbar. Aufgrund der Makroprofilierung der Walzenoberfläche mit Rillen 8 und Stegen 9 wird lediglich ein Teil der durchgeschossenen Filamente 2 zwischen Ablegesiebband 1 und Übergabewalze 4 eingeklemmt, nämlich lediglich im Bereich der Stege 9. In der Fig. 3 ist auch erkennbar, dass der Durchmesser der Filamente 2 wesentlich geringer ist als der Durchmesser der Kettfäden 10 des Ablegesiebbandes 1.In the Fig. 3 are shown in an enlarged section, the warp threads 10 of the Ablegesiebbandes 1 above the macro-profiled with grooves 8 and webs 9 roller surface of the transfer roller 4. Below the warp threads 10 are sucked through the Ablegesiebband 1 or slotted fibers 2 recognizable. Due to the macroprofiling of the roll surface with grooves 8 and webs 9, only a portion of the slotted filaments 2 between Ablegesiebband 1 and transfer roller 4 is clamped, namely only in the region of the webs 9. In the Fig. 3 is also recognizable that the Diameter of the filaments 2 is substantially less than the diameter of the warp threads 10 of the Ablegesiebbandes. 1

Vorzugsweise und im Ausführungsbeispiel ist die Profilierung (Makroprofilierung) der Übergabewalze 4 in Form von zwei Gewinden (11, 12) ausgebildet, die sich jeweils von der Mitte der Übergabewalze 4 zu einem Stirnende der Übergabewalze 4 erstrecken. Zweckmäßigerweise und im Ausführungsbeispiel handelt es sich um gegenläufige Gewinde 11, 12. Das Gewinde 11 ist im Ausführungsbeispiel linksgängig ausgebildet und das Gewinde 12 ist rechtsgängig ausgebildet. Aufgrund der gewindeförmigen Ausbildung bzw. aufgrund der Steigung der Profilierung werden die durchgeschossenen Filamente 2 nur zeitweilig zwischen Ablegesiebband 1 und Stege 9 eingeklemmt. Hier ändert sich die Position der Kontaktstellen des Ablegesiebbandes 1 mit der Übergabewalze 4 bei Bewegung des Ablegesiebbandes 1 bzw. bei Rotation der Übergabewalze 4 also kontinuierlich. Wenn die durchgeschossenen Filamente 2 aus der Einklemmung kommen, können sie durch den Zug der Kalanderwalzen 6, 7 mit der restlichen Vliesbahn 3 weiter befördert werden. Auf diese Weise kann sehr effektiv ein Abreißen der durchgeschossenen Filamente 2 und somit der nachteilhafte "Schneeflug" vermieden werden.Preferably, and in the embodiment, the profiling (macro-profiling) of the transfer roller 4 in the form of two threads (11, 12) is formed, each extending from the center of the transfer roller 4 to a front end of the transfer roller 4. Appropriately, and in the embodiment, it is counter-rotating thread 11, 12. The thread 11 is formed in the embodiment left-handed and the thread 12 is formed right-handed. Due to the thread-like design or due to the slope of the profiling the slotted filaments 2 are only temporarily clamped between Ablegesiebband 1 and webs 9. Here, the position of the contact points of the Ablegesiebbandes 1 with the transfer roller 4 changes during movement of the Ablegesiebbandes 1 or during rotation of the transfer roller 4 so continuously. If the collapsed filaments 2 come out of the entrapment, they can be further conveyed by the train of calender rolls 6, 7 with the remaining nonwoven web 3. In this way, a tearing off of the filaments 2 which have fallen through and thus the disadvantageous "snowflight" can be avoided very effectively.

Nach sehr bevorzugter Ausführungsform der Erfindung sind die Oberflächen der Profilierungsmaxima der Profilierung (Makroprofilierung) zusätzlich noch mit einer Mikroprofilierung 13 versehen. Im Ausführungsbeispiel weisen die Oberflächen der Stege 9 eine solche Mikroprofilierung auf. Zweckmäßigerweise und im Ausführungsbeispiel werden durch die mit der Mikroprofilierung erreichte Oberflächenstruktur lediglich noch punktuelle Kontaktbereiche zwischen Ablegesiebband 1 und Übergabewalze 4 bzw. Stegen 9 realisiert. Vorzugsweise und im Ausführungsbeispiel entspricht die Mikroprofilierung einer globularen Oberflächentopografie. Die Oberflächen der Mikroprofilierungsmaxima 14 sind zweckmäßigerweise sphärisch und/oder ellipsoidförmig ausgebildet. Die Mikroprofilierung der Stegoberflächen kann beispielsweise durch thermisches Spritzen oder galvanisches Beschichten erzeugt werden.After a very preferred embodiment of the invention, the surfaces of the Profilierungsmaxima the profiling (macro-profiling) are additionally provided with a micro-profiling 13. In the exemplary embodiment, the surfaces of the webs 9 have such a microprofiling. Appropriately, and in the exemplary embodiment are achieved by the microprofiling surface structure only selective contact areas between Ablegesiebband 1 and transfer roller 4 and webs 9. Preferably and in the exemplary embodiment, the microprofiling corresponds to a globular surface topography. The surfaces of the microprofiling maxima 14 are expediently spherical and / or ellipsoidal in shape. The micro-profiling of the web surfaces can be produced for example by thermal spraying or electroplating.

Claims (10)

  1. Apparatus for manufacturing a spunbond web comprising a foraminous deposition belt (1) on which fibres can be deposited to form a nonwoven web (3),
    wherein the foraminous deposition belt (1) is guided over at least one roller and wherein the roller surface of this roller is profiled with the proviso that the foraminous deposition belt (1) is in touching contact with the profiling maxima of the roller surface.
  2. The apparatus according to claim 1, wherein the roller is configured as a transfer roller (4) for the nonwoven web (3).
  3. The apparatus according to claim 2, wherein the transfer roller (4) is configured for transfer of the nonwoven web (3) to a calender (5).
  4. The apparatus according to any one of claims 1 to 3, wherein the foraminous deposition belt (1) wraps around the roller with a wrap-around angle of at least 70°.
  5. The apparatus according to any one of claims 1 to 4, wherein at least 70%, preferably at least 80% of the roller surface is profiled.
  6. The apparatus according to any one of claims 1 to 5, wherein the profiling of the roller surface is configured in the form of grooves (8) and webs (9) running over at least a part of the roller circumference.
  7. The apparatus according to claim 6, wherein the profiling is configured in the form of at least one thread (11, 12).
  8. The apparatus according to any one of claims 1 to 7, wherein the position of the contact points of the foraminous deposition belt (1) with the roller during movement of the foraminous deposition belt (1) or during rotation of the roller varies continuously and/or discontinuously as a result of the profiling of the roller.
  9. The apparatus according to any one of claims 1 to 8, wherein the profiling maximum of the profiled roller surface additionally have a micro-profiling (13) on its surface.
  10. The apparatus according to claim 9, wherein the micro-profiling is produced by thermal spraying and/or by galvanic coating.
EP07012794.9A 2007-06-29 2007-06-29 Method for manufacturing a spunbond web Active EP2017206B1 (en)

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Application Number Priority Date Filing Date Title
DK07012794.9T DK2017206T3 (en) 2007-06-29 2007-06-29 Apparatus for making a felt web
EP07012794.9A EP2017206B1 (en) 2007-06-29 2007-06-29 Method for manufacturing a spunbond web
ES07012794.9T ES2507099T3 (en) 2007-06-29 2007-06-29 Device for the manufacture of a non-woven fabric spun by adhesion
CN2008101317742A CN101333729B (en) 2007-06-29 2008-06-27 Device for producing spun-bonded fibre net
US12/147,562 US7849902B2 (en) 2007-06-29 2008-06-27 Apparatus for making a spunbond web

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EP07012794.9A EP2017206B1 (en) 2007-06-29 2007-06-29 Method for manufacturing a spunbond web

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EP2017206A1 EP2017206A1 (en) 2009-01-21
EP2017206B1 true EP2017206B1 (en) 2014-06-25

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EP (1) EP2017206B1 (en)
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PL3199671T3 (en) * 2016-01-27 2020-08-10 Reifenhäuser GmbH & Co. KG Maschinenfabrik Device for manufacturing non-woven material
US11244280B2 (en) 2019-03-18 2022-02-08 International Business Machines Corporation Reducing food waste by using a machine learning model

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US4592463A (en) * 1984-07-05 1986-06-03 Halil Puskar Roller with double left and double right helix pattern track
US5213202A (en) * 1991-10-07 1993-05-25 Morrison Marketing, Inc. Helically grooved conveyor pulley for use in belted conveyor systems
JP3535064B2 (en) * 2000-03-07 2004-06-07 カネボウ株式会社 Method and apparatus for producing thermoplastic elastomer nonwoven fabric roll
TW508390B (en) * 2001-05-09 2002-11-01 Ind Tech Res Inst Feeding device for preneedling nonwoven fabrics
AU2003284872A1 (en) * 2002-10-24 2004-05-13 Advanced Design Concept Gmbh Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics
DE50201372D1 (en) * 2002-12-19 2004-11-25 Reifenhaeuser Masch Device for depositing and conveying a nonwoven web made of plastic threads

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US7849902B2 (en) 2010-12-14
DK2017206T3 (en) 2014-09-22
EP2017206A1 (en) 2009-01-21
US20090008036A1 (en) 2009-01-08
CN101333729B (en) 2010-12-29
ES2507099T3 (en) 2014-10-14
CN101333729A (en) 2008-12-31

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