EP1930492A1 - Method and apparatus for making a spunbonded nonwoven fabric - Google Patents

Method and apparatus for making a spunbonded nonwoven fabric Download PDF

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Publication number
EP1930492A1
EP1930492A1 EP06025192A EP06025192A EP1930492A1 EP 1930492 A1 EP1930492 A1 EP 1930492A1 EP 06025192 A EP06025192 A EP 06025192A EP 06025192 A EP06025192 A EP 06025192A EP 1930492 A1 EP1930492 A1 EP 1930492A1
Authority
EP
European Patent Office
Prior art keywords
filaments
filament
filamentablage
tray
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06025192A
Other languages
German (de)
French (fr)
Other versions
EP1930492B1 (en
Inventor
Sebastian Sommer
Wilhelm 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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to PL06025192T priority Critical patent/PL1930492T3/en
Priority to ES06025192T priority patent/ES2352508T3/en
Priority to DK06025192.3T priority patent/DK1930492T3/en
Priority to EP06025192A priority patent/EP1930492B1/en
Priority to DE502006007979T priority patent/DE502006007979D1/en
Priority to AT06025192T priority patent/ATE483052T1/en
Priority to CA2612854A priority patent/CA2612854C/en
Priority to US11/998,444 priority patent/US9453292B2/en
Priority to IL187752A priority patent/IL187752A/en
Priority to ARP070105359A priority patent/AR064079A1/en
Priority to JP2007313481A priority patent/JP4827827B2/en
Priority to KR1020070125390A priority patent/KR101031801B1/en
Priority to RU2007145228/12A priority patent/RU2361974C1/en
Priority to BRPI0704633A priority patent/BRPI0704633B1/en
Priority to MX2007015405A priority patent/MX2007015405A/en
Priority to CN2007101800983A priority patent/CN101220543B/en
Publication of EP1930492A1 publication Critical patent/EP1930492A1/en
Application granted granted Critical
Publication of EP1930492B1 publication Critical patent/EP1930492B1/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
    • D04H17/00—Felting apparatus
    • 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 method for producing a spunbonded non-wovens. Moreover, the invention relates to an apparatus for carrying out such a method. It is within the scope of the invention that the continuous filaments consist of a thermoplastic material. Endless filaments differ because of their quasi-endless length of staple fibers, which have much smaller lengths of, for example, 10 to 60 mm. The continuous filaments are normally produced with a spinning device or with a spinnerette.
  • the invention has the technical problem of providing a method for producing a spunbonded nonwoven filaments, can be made with the thick or voluminous spunbonded nonwoven with a very regular or homogeneous structure.
  • the invention is based on the technical problem of specifying a corresponding device.
  • the invention teaches a method for producing a spunbonded nonwoven filament, wherein filaments are produced, at least part of which has a natural crimp, wherein the filaments are deposited in the storage area of a conveyor for filament storage and wherein the filament tray is conveyed by the conveyor in the direction of a solidification device and wherein a flowing in the conveying direction of the Filamentablage on the surface of the Filamentablage gas flow is generated.
  • single-layer or multi-layer spunbonded nonwovens can be produced within the scope of the invention, which consist entirely of filaments with natural crimping. However, it is also within the scope of the invention to produce a single-ply spunbonded fabric comprising a blend of natural crimp filaments and non-crimping filaments.
  • the individual layers can be formed from natural crimp or non-crimping filaments or blends of natural crimp filaments with non-crimping filaments.
  • a multilayer spunbonded web according to the invention comprises at least one layer consisting solely of natural crimp filaments or of a blend of natural crimp filaments with non-crimping filaments.
  • the endless filaments are first spun from a spinning device or from a spinnerette. Conveniently, then a cooling of these filaments. It is within the scope of the invention that the filaments are drawn in a drawing device. The cooling and Drawing can also take place in particular in a combined cooling and stretching device. Before the storage of the filaments in the storage area, they are preferably passed through a diffuser. The diffuser is then arranged between the drawing device or between the combined cooling and drawing device and the storage area.
  • the filaments emerging from the spinning device are preferably prepared by the Reicofil III process ( DE-PS 196 20 379 ) or according to the Reicofil IV method ( EP-OS 1 340 843 ).
  • filaments with natural crimping means filaments or bicomponent / multicomponent filaments in which crimping commences after drawing.
  • the crimping starts here as soon as the stretching forces or the air-stretching forces no longer act on the filaments.
  • the crimping can first take place before the deposit, ie between the drafting device and the storage area, in particular in a preferably provided diffuser.
  • This ripple, occurring before the filaments are deposited is called “primary rippling”.
  • the filaments with natural crimping can develop a (further) crimp in particular even after being deposited. This ripple occurring after placement is called “secondary rippling".
  • filaments with natural crimping preferably mean filaments which, after being deposited on the conveyor in the relaxed state, have radii of curvature of less than 5 mm. These filaments have over most of their length corresponding crimps with the aforementioned radii of curvature.
  • the filaments with natural crimping bicomponent filaments or multi-component filaments with side-by-side arrangement.
  • Multi-component filaments with an acentric core / shell arrangement can be used.
  • the inventive method is performed with the proviso that a crimping of the filaments (with natural crimping) takes place after a stretching of the filaments and before filing the filaments. This is therefore the already mentioned primary crimping of the filaments. It is also within the scope of the invention that a crimping of the filaments (with natural crimping) takes place after filing the filaments on the conveyor. This is the secondary ripple already mentioned above.
  • the conveyor expediently consists of a conveyor belt or of a plurality of successively connected conveyor belts.
  • at least one conveyor belt in the filing area of the filaments is designed as a gas-permeable (air-permeable) conveyor belt or gas-permeable (air-permeable) screen belt.
  • a screen belt is, in particular, an endless belt guided over deflection rollers.
  • the filaments are deposited on a wire belt as a conveyor or as part of a conveyor for filament storage and the filament tray is acted upon in a suction region of the wire with suction air.
  • the suction region comprises the storage area for the filaments and expediently also an area in the conveying direction behind this storage area.
  • at least one suction device is preferably arranged below the screen belt. With such a suction device, air is sucked through the screen belt, so that, as it were, the filaments or the filament deposit is sucked onto the screen belt. This results in a certain stabilization of the Filamentablage. Due to this Saugbeetzschlagung points the filament tray a relatively small thickness (for example, a thickness of about 2 to 3 mm).
  • the filament tray In this suction area, the filament tray is (still) fixed and held down by a suction air field on the screen belt to survive the relatively high air velocities in the storage area without unwanted displacements and inhomogeneities.
  • the suction area When the suction area is left, the filament tray jumps on, in particular due to the secondary crimping. Thereafter, the Filamentablage has a much higher thickness (for example, a thickness of 3 cm at 40 g / m 2 basis weight).
  • a gas flow flowing along in the conveying direction of the filament deposit on the surface of the filament deposit is generated.
  • the fact that the gas stream flows along the surface of the filament deposit means, in particular, that the gas stream flows parallel or substantially parallel to the surface of the filament deposit or flows parallel or substantially parallel to the surface of the expectoration device or of the screen belt. It is within the scope of the invention that the gas stream flows past in the conveying direction behind the suction on the surface of the filament tray.
  • the gas stream is preferably an air stream.
  • the filament deposit jumps on leaving the suction area, in particular because of the secondary crimping as it were and then results in a relatively thick Filamentablage.
  • the invention is based on the recognition that this Filamentablage is at risk when jumping or in the cracked state, on the one hand, because shrinkage forces from the secondary ripples can destroy the uniformity of Filamentablage and on the other hand because air forces act on theticianprurgede Filamentablage and this Filamentablage quasi can open. These air forces result from the fact that the Filamentablage is at the speed of the conveyor or the screen belt as it moves against standing ambient air.
  • the filament deposit is stabilized in particular in the suction-free regions by an imposed air flow.
  • the flow velocity of the gas stream (air stream) corresponds to at least half the conveying speed of the filament deposit, preferably at least 80%, preferably at least 90% and very preferably at least 95% of the conveying speed of the filament deposit.
  • the flow velocity of the gas stream (air stream) corresponds at least to the conveying speed or approximately the conveying speed of the filament deposit.
  • the flow velocity of the gas stream (air stream) is slightly higher than the conveying speed of the filament deposit, preferably at most 20%, preferably at most 15% and very preferably at most 10% higher than the conveying speed of the filament deposit.
  • the filament deposit is solidified in the solidification device with at least one fluid medium, preferably with at least one hot fluid medium. It is within the scope of the invention that the filament deposit in the solidification device with the hot fluid medium is acted upon with the proviso that the filament tray is pressed against the conveyor or against a gas-permeable screen belt. In this case, a transverse loading of the Filamentablagenober Assembly is advantageously carried out by the forces of the hot fluid medium. As a result, the Filamentablage to the conveyor or to the Pressed sieve belt. It is within the scope of the invention that the hot fluid medium flows through the Filamentablage and the gas-permeable screen belt.
  • This solidification is preferably carried out in a solidification chamber, through which the conveyor or the screen belt is guided with the filament tray.
  • the solidification is carried out as hot air solidification.
  • the fluid medium preferably flows in the solidification device perpendicular to the surface of the filament deposit and preferably from above onto the filament deposit. It is within the scope of the invention that the Filamentablage of the fluid medium, preferably from the hot fluid medium in terms of area (ie, not only linear) is applied.
  • the gas stream flowing along the surface of the filament deposit is produced by means of the fluid medium flowing in the solidification device.
  • the fluid medium flowing in the solidification device preferably the hot air flowing there
  • the gas stream flowing along according to the invention is generated at least essentially by a Venturi effect.
  • gas is injected and / or sucked into the region behind the suction region and deflected by means of at least one flow-guiding device to the gas flow flowing along the surface of the filament deposit.
  • the at least one flow-guiding device is preferably a flow guide plate or a curved flow guide plate.
  • the invention also provides a device for producing a spunbonded nonwoven filament which, at least in part, is a natural one Having crimp, with at least one spinning device for the production of filaments and with a conveyor with a storage area in which the filaments for Filamentablage can be stored, further comprising a solidification device for solidifying the filaments and wherein at least one generating device is provided, with which a gas flow flowing along between the depositing area and the solidifying device on the surface of the filament deposit in the conveying direction of the filament deposit can be generated.
  • this gas stream according to the invention flows in the conveying direction behind the suction region along the surface of the filament deposit, preferably up to the solidification device.
  • a stretching device for stretching the filaments is arranged between the spinning device and the storage area.
  • a cooling device is arranged between the spinning device and drawing device.
  • a combined cooling and stretching device is used.
  • a diffuser for filing the filaments is provided between the drawing device and the storage area. This diffuser is of particular importance in the context of the invention. Expediently, the diffuser has diverging diffuser walls towards the storage area.
  • the invention is based on the finding that with the method according to the invention and with the device according to the invention thick or voluminous spunbonded nonwovens can be produced, which nonetheless are characterized by homogeneous properties and a homogeneous or uniform structure. As a result, spunbonded fabrics with optimal properties and be produced with optimal quality. It should also be emphasized that these spunbonded nonwovens of corresponding thickness and homogeneity can be reproducibly produced. It should also be emphasized that the method according to the invention can be carried out with relatively little effort in view of the considerable advantages achieved, and in so far only causes a relatively low cost. Existing devices can be easily retrofitted with the components according to the invention.
  • the figures show an apparatus for carrying out a method for producing a spunbonded nonwoven filament, wherein filaments 1 are produced, of which at least a part has a natural crimp.
  • the spunbonded web may, according to one embodiment, be a monolayer spunbonded web consisting either exclusively of natural crimp filaments or of a blend of natural crimp filaments and non-crimping filaments.
  • the share of Filaments with natural crimp is preferably at least 20 wt .-%, preferably at least 30 wt .-%.
  • the device according to the invention has a spinning device 2 for producing the filaments 1 and expediently a cooling chamber 3 arranged below the spinning device 2, into which process air for cooling the filaments 1 can be inserted. Furthermore, a drawing device 4 for aerodynamic stretching of the filaments 1 is provided. Below the stretching device 4, a diffuser 5 is preferably arranged and in the exemplary embodiment, which was indicated only schematically. Below the stretching device 4, for example, a laying unit of two successively connected diffusers can be provided. Below the diffuser 5 as an air-permeable screen belt 6 formed conveyor is provided. In a storage area 7 of this screen belt 6, the filaments 1 are deposited to Filamentablage 8.
  • the filament tray 8 is formed from filaments 1 with natural crimping, wherein the filaments 1 are preferably bicomponent filaments with side-by-side arrangement. After stretching or below the drawing device 4, a first crimping (primary crimping) of these filaments 1 takes place in the diffuser 5.
  • the filament tray 8 is conveyed in the figures with the screen belt 6 to the left in the direction of a solidification device 9. In the enlarged section of the Fig. 2 It has been shown that the filament tray 8 is constructed as a shingled tray. Newly deposited filaments 1 are placed here on previously deposited filaments 1 and in this way arises as it were a shingled tray.
  • the filament tray 8 is acted upon with suction air.
  • suction air preferably with a suction device, not shown, sucked air from below through the wire 6 and thereby the filaments 1 and the filament tray 8 are sucked onto the screen belt 6 as it were.
  • the suction region 10 extends over the deposition region 7 for the filaments 1 into a region 11 arranged downstream of the deposition region 7 in the conveying direction.
  • the filament deposition 8 in this suction region 10 on the screen belt 6 becomes due to the introduction of the suction air fixed and held down, so that the filament tray 8 has a relatively small thickness (for example, a thickness of 2 to 3 mm).
  • the filament tray 8 leaves the suction area 10 during further conveyance with the wire belt 6, the filament tray 8 springs in particular because of a further crimping (secondary crimping) and results in a filament tray 8 with a substantially higher thickness (for example with a thickness of about 3 cm ).
  • This "popping up" is in the Fig. 2 to 4 indicated by a corresponding increase in thickness of the filament tray 8.
  • two disadvantageous effects can be associated with the popping up of the filament deposit 8.
  • secondary crimp shrinkage forces may destroy the uniform structure of the filament tray 8.
  • air forces can open the Filamentablage 7 as it were, since the Filamentablage 8 is moved at Siebband beautician's. This opening, in particular due to the enlarged portion of Fig. 2 Shingled tray occur occur.
  • a gas stream flowing along the surface of the filament deposit 8 in the conveying direction of the filament deposit 8 is now generated in the region of the springing up of the filament deposit 8 or in the region of the secondary ruffling, which is indicated by an arrow G in the figures.
  • This gas stream G flows in the conveying direction of the filament tray 8 behind the suction area 10 the surface of the filament tray 8 along.
  • the flow velocity of this gas stream G is at least the conveying speed of the filament deposit 8 or the wire belt speed or the flow velocity of the gas stream G is slightly higher than the conveying speed of the filament deposit 8 or as the wire belt speed.
  • the filament tray 8 is introduced with the screen belt 6 in a solidification chamber 12, in which preferably a solidification of the filament tray 8 with a hot fluid medium, preferably a hot air solidification takes place.
  • the hot fluid medium or the hot air flows from above perpendicular to the surface of the filament tray 8 surface on the filament tray 8. This is indicated by corresponding arrows in the Fig. 2 to 4 indicated schematically.
  • the Fig. 3 shows a particular embodiment for generating a gas stream according to the invention G.
  • an upper cover 13 is provided and the gas stream G flows between this cover 13 and the wire 6 and the surface of the filament tray 8 in the direction of solidification device 9.
  • the cover 13 is expediently parallel or arranged substantially parallel to the wire belt 6 or to the surface of the filament tray 8.
  • the gas flow G flowing along the surface of the filament deposit 8 is generated by means of the fluid medium flowing in the solidification device 9.
  • the fluid medium flowing in the solidification chamber 12 constitutes the driving force for the gas flow G.
  • Fig. 4 is another preferred embodiment represents.
  • air is blown from above into the area of the secondary crimping (area of the opened filament deposit).
  • the injected gas is deflected to the gas flow G flowing along the surface of the filament deposit 8.
  • the gas can also be sucked in here.
  • the gas stream G flows perpendicularly or substantially perpendicular to the flow direction of the fluid medium in the solidification device 9 or in the solidification chamber 12.
  • a single air-permeable screen belt 6 is provided in which the filament tray 8 is conveyed from the depositing area 7 over the area 11 and over the area of the secondary crimping (area of the opened filament tray 8) into the hardening chamber 12.
  • the screen belt 6 is guided in the usual way as an endless belt via corresponding pulleys.
  • the aggregate of cooling chamber 3, stretching device 4 and diffuser 5, apart from an air supply in the cooling chamber 3 and apart from at least one air inlet in the region of the diffuser 5 is formed as a closed system.
  • the aggregate of cooling chamber 3 and stretching device, apart from the air supply in the cooling chamber 3 is executed closed.
  • This closed embodiment of the device has proven to be particularly suitable with regard to an optimal spunbonded quality, in particular in combination with the further inventive features claimed here.

Abstract

In a process to produce spun-bonded fleece from endless filaments, a proportion of the filaments are naturally crinkled or curled. The filaments are deposited on a moving conveyer that advances towards a bonding station. The bonding station consists of an overhead hot gas blower directed at the fleece fibres. The fibres are deposited essentially in parallel array in-line with the direction of travel. The filament curl is generated either before or after deposit on the conveyer. Further claimed is a commensurate fleece production and bonding unit.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Spinnvlieses aus Endlosfilamenten. Außerdem betrifft die Erfindung eine Vorrichtung zur Durchführung eines solchen Verfahrens. Es liegt im Rahmen der Erfindung, dass die Endlosfilamente aus einem thermoplastischen Kunststoff bestehen. Endlosfilamente unterscheiden sich aufgrund ihrer quasi endlosen Länge von Stapelfasern, die wesentlich geringere Längen von beispielsweise 10 bis 60 mm aufweisen. Die Endlosfilamente werden normalerweise mit einer Spinneinrichtung bzw. mit einer Spinnerette erzeugt.The invention relates to a method for producing a spunbonded non-wovens. Moreover, the invention relates to an apparatus for carrying out such a method. It is within the scope of the invention that the continuous filaments consist of a thermoplastic material. Endless filaments differ because of their quasi-endless length of staple fibers, which have much smaller lengths of, for example, 10 to 60 mm. The continuous filaments are normally produced with a spinning device or with a spinnerette.

Grundsätzlich ist es aus der Praxis bekannt, unter Verwendung von Stapelfasern voluminöse Vliese herzustellen, die als "High Loft-Vliese" bekannt sind. Die Verfestigung der Faserablage erfolgt hier normalerweise durch Heißluftverfestigung im Durchströmverfahren. Diese Vliese werden u. a. in der Hygieneindustrie, (beispielsweise als Verteillagen in Windeln) und in der Filtertechnik eingesetzt. Es wurde bereits versucht, vergleichbar dicke bzw. voluminöse Vliese aus Endlosfilamenten herzustellen, wobei Mehrkomponentenfilamente mit natürlicher Kräuselung eingesetzt wurden. Dabei wird aber in der Regel eine Filamentablage bzw. ein Spinnvlies mit unregelmäßiger bzw. inhomogener Struktur erhalten. Das wird zumindest teilweise darauf zurückgeführt, dass die Aktivierung der Kräuselung zu Schrumpfkräften führen kann, die ein Aufreißen der Filamentablage bzw. des Spinnvlieses zur Folge haben. Das Ergebnis sind wenig akzeptable Produkte.Basically, it is known from practice to produce bulky nonwovens using staple fibers known as "high loft nonwovens". The hardening of the fiber deposit is usually carried out by hot air solidification in Durchströmverfahren. These fleeces are u. a. used in the hygiene industry, (for example as distributing diapers) and in filter technology. It has already been tried to produce comparable thick or voluminous nonwovens from continuous filaments, with multi-component filaments were used with natural crimp. But usually a Filamentablage or a spunbonded fabric is obtained with irregular or inhomogeneous structure. This is at least partly attributed to the fact that the activation of the crimp can lead to shrinkage forces, which result in a rupture of the filament deposit or spunbonded fabric. The result is unacceptable products.

Demgegenüber liegt der Erfindung das technische Problem zugrunde, ein Verfahren zur Herstellung eines Spinnvlieses aus Endlosfilamenten anzugeben, mit dem dicke bzw. voluminöse Spinnvliese mit sehr regelmäßiger bzw. homogener Struktur hergestellt werden können. Außerdem liegt der Erfindung das technische Problem zugrunde, eine entsprechende Vorrichtung anzugeben.In contrast, the invention has the technical problem of providing a method for producing a spunbonded nonwoven filaments, can be made with the thick or voluminous spunbonded nonwoven with a very regular or homogeneous structure. In addition, the invention is based on the technical problem of specifying a corresponding device.

Zur Lösung dieses technischen Problems lehrt die Erfindung ein Verfahren zur Herstellung eines Spinnvlieses aus Endlosfilamenten, wobei Filamente erzeugt werden, von denen zumindest ein Teil eine natürliche Kräuselung aufweist,
wobei die Filamente im Ablagebereich einer Fördereinrichtung zur Filamentablage abgelegt werden und wobei die Filamentablage mit der Fördereinrichtung in Richtung einer Verfestigungseinrichtung befördert wird
und wobei ein in Förderrichtung der Filamentablage an der Oberfläche der Filamentablage entlangströmender Gasstrom erzeugt wird.To solve this technical problem, the invention teaches a method for producing a spunbonded nonwoven filament, wherein filaments are produced, at least part of which has a natural crimp,
wherein the filaments are deposited in the storage area of a conveyor for filament storage and wherein the filament tray is conveyed by the conveyor in the direction of a solidification device
and wherein a flowing in the conveying direction of the Filamentablage on the surface of the Filamentablage gas flow is generated.

Grundsätzlich können im Rahmen der Erfindung einlagige oder mehrlagige Spinnvliese erzeugt werden, die vollständig aus Filamenten mit natürlicher Kräuselung bestehen. Es liegt aber auch im Rahmen der Erfindung, dass ein einlagiges Spinnvlies hergestellt wird, das eine Mischung aus Filamenten mit natürlicher Kräuselung und aus nicht-kräuselnden Filamenten aufweist. Bei mehrlagigen Spinnvliesen können die einzelnen Lagen gebildet werden aus Filamenten mit natürlicher Kräuselung oder aus nicht-kräuselnden Filamenten oder aus Mischungen von Filamenten mit natürlicher Kräuselung mit nicht-kräuselnden Filamenten. Zweckmäßigerweise weist ein erfindungsgemäßes mehrlagiges Spinnvlies zumindest eine Lage (Schicht) auf, die ausschließlich aus Filamenten mit natürlicher Kräuselung oder aus einer Mischung von Filamenten mit natürlicher Kräuselung mit nicht-kräuselnden Filamenten besteht.In principle, single-layer or multi-layer spunbonded nonwovens can be produced within the scope of the invention, which consist entirely of filaments with natural crimping. However, it is also within the scope of the invention to produce a single-ply spunbonded fabric comprising a blend of natural crimp filaments and non-crimping filaments. For multilayer spunbonded nonwovens, the individual layers can be formed from natural crimp or non-crimping filaments or blends of natural crimp filaments with non-crimping filaments. Conveniently, a multilayer spunbonded web according to the invention comprises at least one layer consisting solely of natural crimp filaments or of a blend of natural crimp filaments with non-crimping filaments.

Die Endlosfilamente werden zunächst aus einer Spinneinrichtung bzw. aus einer Spinnerette ersponnen werden. Zweckmäßigerweise erfolgt dann eine Abkühlung dieser Filamente. Es liegt im Rahmen der Erfindung, dass die Filamente in einer Verstreckeinrichtung verstreckt werden. Die Abkühlung und Verstreckung kann insbesondere auch in einer kombinierten Abkühl- und Verstreckeinrichtung stattfinden. Bevor die Ablage der Filamente im Ablagebereich erfolgt, werden sie bevorzugt durch einen Diffusor geführt. Der Diffusor ist dann zwischen der Verstreckeinrichtung bzw. zwischen der kombinierten Abkühl- und Verstreckeinrichtung und dem Ablagebereich angeordnet. Die aus der Spinneinrichtung austretenden Filamente werden vorzugsweise nach dem Reicofil III-Verfahren ( DE-PS 196 20 379 ) oder nach dem Reicofil IV-Verfahren ( EP-OS 1 340 843 ) behandelt.The endless filaments are first spun from a spinning device or from a spinnerette. Conveniently, then a cooling of these filaments. It is within the scope of the invention that the filaments are drawn in a drawing device. The cooling and Drawing can also take place in particular in a combined cooling and stretching device. Before the storage of the filaments in the storage area, they are preferably passed through a diffuser. The diffuser is then arranged between the drawing device or between the combined cooling and drawing device and the storage area. The filaments emerging from the spinning device are preferably prepared by the Reicofil III process ( DE-PS 196 20 379 ) or according to the Reicofil IV method ( EP-OS 1 340 843 ).

Filamente mit natürlicher Kräuselung meint insbesondere Filamente bzw. Bikomponenten-/Mehrkomponentenfilamente, bei denen nach der Verstreckung eine Kräuselung einsetzt. Die Kräuselung beginnt hier also, sobald die Verstreckkräfte bzw. die Luft-Verstreckkräfte nicht mehr an den Filamenten wirken. Dabei kann die Kräuselung zunächst vor der Ablage, d. h. zwischen Verstreckeinrichtung und Ablagebereich, insbesondere in einem vorzugsweise vorgesehenen Diffusor stattfinden. Bei dieser vor der Ablage der Filamente stattfindenden Kräuselung spricht man von "primärer Kräuselung". Die Filamente mit natürlicher Kräuselung können insbesondere aber auch nach der Ablage eine (weitere) Kräuselung entwickeln. Bei dieser nach der Ablage stattfindenden Kräuselung spricht man von "sekundärer Kräuselung". Filamente mit natürlicher Kräuselung meint im Rahmen der Erfindung vorzugsweise Filamente, die nach der Ablage auf der Fördereinrichtung im entspannten Zustand Krümmungsradien unter 5 mm aufweisen. Diese Filamente weisen dabei über den größten Teil ihrer Länge entsprechende Kräuselungen mit den vorgenannten Krümmungsradien auf. - Nach sehr bevorzugter Ausführungsform der Erfindung sind die Filamente mit natürlicher Kräuselung Bikomponentenfilamente bzw. Mehrkomponentenfilamente mit Seite-an-Seite-Anordnung. Nach einer anderen bevorzugten Ausführungsform können als Filamente mit natürlicher Kräuselung auch Bikomponentenfilamente bzw.In particular, filaments with natural crimping means filaments or bicomponent / multicomponent filaments in which crimping commences after drawing. The crimping starts here as soon as the stretching forces or the air-stretching forces no longer act on the filaments. In this case, the crimping can first take place before the deposit, ie between the drafting device and the storage area, in particular in a preferably provided diffuser. This ripple, occurring before the filaments are deposited, is called "primary rippling". However, the filaments with natural crimping can develop a (further) crimp in particular even after being deposited. This ripple occurring after placement is called "secondary rippling". In the context of the invention, filaments with natural crimping preferably mean filaments which, after being deposited on the conveyor in the relaxed state, have radii of curvature of less than 5 mm. These filaments have over most of their length corresponding crimps with the aforementioned radii of curvature. - According to a very preferred embodiment of the invention, the filaments with natural crimping bicomponent filaments or multi-component filaments with side-by-side arrangement. According to another preferred embodiment, filaments with natural crimping and bicomponent filaments or

Mehrkomponentenfilamente mit azentrischer Kern/Mantel-Anordnung eingesetzt werden.Multi-component filaments with an acentric core / shell arrangement can be used.

Es liegt im Rahmen der Erfindung, dass das erfindungsgemäße Verfahren mit der Maßgabe geführt wird, dass eine Kräuselung der Filamente (mit natürlicher Kräuselung) nach einer Verstreckung der Filamente und vor der Ablage der Filamente stattfindet. Hierbei handelt es sich also um die bereits genannte primäre Kräuselung der Filamente. Es liegt weiterhin im Rahmen der Erfindung, dass auch eine Kräuselung der Filamente (mit natürlicher Kräuselung) nach der Ablage der Filamente auf der Fördereinrichtung stattfindet. Hierbei handelt es sich um die oben bereits erwähnte sekundäre Kräuselung.It is within the scope of the invention that the inventive method is performed with the proviso that a crimping of the filaments (with natural crimping) takes place after a stretching of the filaments and before filing the filaments. This is therefore the already mentioned primary crimping of the filaments. It is also within the scope of the invention that a crimping of the filaments (with natural crimping) takes place after filing the filaments on the conveyor. This is the secondary ripple already mentioned above.

Die Fördereinrichtung besteht zweckmäßigerweise aus einem Förderband oder aus einer Mehrzahl von hintereinandergeschalteten Förderbändern. Dabei ist zumindest ein Förderband im Ablagebereich der Filamente als gasdurchlässiges (luftdurchlässiges) Förderband bzw. gasdurchlässiges (luftdurchlässiges) Siebband ausgebildet. Bei einem solchen Siebband handelt es sich insbesondere um ein über Umlenkrollen geführtes Endlosband. Nach besonders bevorzugter Ausführungsform der Erfindung werden die Filamente auf einem Siebband als Fördereinrichtung oder als Bestandteil einer Fördereinrichtung zur Filamentablage abgelegt und die Filamentablage wird in einem Saugbereich des Siebbandes mit Saugluft beaufschlagt. Es liegt dabei im Rahmen der Erfindung, dass der Saugbereich den Ablagebereich für die Filamente umfasst und zweckmäßigerweise auch einen Bereich in Förderrichtung hinter diesem Ablagebereich. Zur Verwirklichung der Saugluftbeaufschlagung ist vorzugsweise zumindest eine Saugvorrichtung unterhalb des Siebbandes angeordnet. Mit einer solchen Saugvorrichtung wird Luft durch das Siebband gesaugt, so dass gleichsam die Filamente bzw. die Filamentablage auf das Siebband gesaugt wird. Dadurch ergibt sich eine gewisse Stabilisierung der Filamentablage. Aufgrund dieser Saugbeaufschlagung weist die Filamentablage eine relativ geringe Dicke auf (beispielsweise eine Dicke von ca. 2 bis 3 mm). In diesem Saugbereich wird die Filamentablage (noch) durch ein Saugluftfeld auf dem Siebband fixiert und niedergehalten, um die relativ hohen Luftgeschwindigkeiten im Ablagebereich ohne unerwünschte Verschiebungen und Inhomogenitäten zu überstehen. Wenn der Saugbereich verlassen wird, springt die Filamentablage insbesondere aufgrund der sekundären Kräuselung gleichsam auf. Danach weist die Filamentablage eine wesentlich höhere Dicke auf (beispielsweise eine Dicke von 3 cm bei 40 g/m2 Flächengewicht).The conveyor expediently consists of a conveyor belt or of a plurality of successively connected conveyor belts. In this case, at least one conveyor belt in the filing area of the filaments is designed as a gas-permeable (air-permeable) conveyor belt or gas-permeable (air-permeable) screen belt. Such a screen belt is, in particular, an endless belt guided over deflection rollers. According to a particularly preferred embodiment of the invention, the filaments are deposited on a wire belt as a conveyor or as part of a conveyor for filament storage and the filament tray is acted upon in a suction region of the wire with suction air. It is within the scope of the invention that the suction region comprises the storage area for the filaments and expediently also an area in the conveying direction behind this storage area. In order to realize the intake air, at least one suction device is preferably arranged below the screen belt. With such a suction device, air is sucked through the screen belt, so that, as it were, the filaments or the filament deposit is sucked onto the screen belt. This results in a certain stabilization of the Filamentablage. Due to this Saugbeaufschlagung points the filament tray a relatively small thickness (for example, a thickness of about 2 to 3 mm). In this suction area, the filament tray is (still) fixed and held down by a suction air field on the screen belt to survive the relatively high air velocities in the storage area without unwanted displacements and inhomogeneities. When the suction area is left, the filament tray jumps on, in particular due to the secondary crimping. Thereafter, the Filamentablage has a much higher thickness (for example, a thickness of 3 cm at 40 g / m 2 basis weight).

Erfindungsgemäß wird ein in Förderrichtung der Filamentablage an der Oberfläche der Filamentablage entlangströmender Gasstrom erzeugt. Dass der Gasstrom an der Oberfläche der Filamentablage entlangströmt meint insbesondere, dass der Gasstrom parallel oder im Wesentlichen parallel zur Oberfläche der Filamentablage strömt oder parallel bzw. im Wesentlichen parallel zur Oberfläche der Födereinrichtung bzw. des Siebbandes strömt. Es liegt dabei im Rahmen der Erfindung, dass der Gasstrom in Förderrichtung hinter dem Saugbereich an der Oberfläche der Filamentablage vorbeiströmt. Bei dem Gasstrom handelt es sich vorzugsweise um einen Luftstrom.According to the invention, a gas flow flowing along in the conveying direction of the filament deposit on the surface of the filament deposit is generated. The fact that the gas stream flows along the surface of the filament deposit means, in particular, that the gas stream flows parallel or substantially parallel to the surface of the filament deposit or flows parallel or substantially parallel to the surface of the expectoration device or of the screen belt. It is within the scope of the invention that the gas stream flows past in the conveying direction behind the suction on the surface of the filament tray. The gas stream is preferably an air stream.

Wie oben bereits dargelegt, springt die Filamentablage beim Verlassen des Saugbereiches insbesondere aufgrund der sekundären Kräuselung gleichsam auf und dann resultiert eine relativ dicke Filamentablage. Der Erfindung liegt die Erkenntnis zugrunde, dass diese Filamentablage beim Aufspringen bzw. im aufgesprungenen Zustand gefährdet ist, und zwar zum einen, weil Schrumpfkräfte aus der sekundären Kräuselung die Gleichmäßigkeit der Filamentablage zerstören können und zum anderen weil Luftkräfte die aufgesprungene Filamentablage beaufschlagen und diese Filamentablage gleichsam öffnen können. Diese Luftkräfte resultieren daraus, dass die Filamentablage mit der Geschwindigkeit der Fördereinrichtung bzw. des Siebbandes gleichsam gegen stehende Umgebungsluft bewegt wird. Der Erfindung liegt nun die Erkenntnis zugrunde, dass die Filamentablage durch den in Förderrichtung an der Oberfläche der Filamentablage entlangströmenden Gasstrom gegenüber den genannten negativen Effekten wirksam stabilisiert werden kann. Mit anderen Worten wird die Filamentablage erfindungsgemäß insbesondere in den saugfreien Bereichen durch eine aufgezwungene Luftströmung stabilisiert.As already explained above, the filament deposit jumps on leaving the suction area, in particular because of the secondary crimping as it were and then results in a relatively thick Filamentablage. The invention is based on the recognition that this Filamentablage is at risk when jumping or in the cracked state, on the one hand, because shrinkage forces from the secondary ripples can destroy the uniformity of Filamentablage and on the other hand because air forces act on the aufgeprungene Filamentablage and this Filamentablage quasi can open. These air forces result from the fact that the Filamentablage is at the speed of the conveyor or the screen belt as it moves against standing ambient air. Of the The invention is based on the finding that the filament deposit can be effectively stabilized against the negative effects mentioned above by the gas flow flowing along in the conveying direction on the surface of the filament deposit. In other words, according to the invention, the filament deposit is stabilized in particular in the suction-free regions by an imposed air flow.

Es liegt im Rahmen der Erfindung, dass die Strömungsgeschwindigkeit des Gasstroms (Luftstroms) mindestens der Hälfte der Fördergeschwindigkeit der Filamentablage entspricht, vorzugsweise mindestens 80 %, bevorzugt mindestens 90 % und sehr bevorzugt mindestens 95 % der Fördergeschwindigkeit der Filamentablage entspricht. Nach besonders bevorzugter Ausführungsform entspricht die Strömungsgeschwindigkeit des Gasstroms (Luftstroms) mindestens der Fördergeschwindigkeit oder in etwa der Fördergeschwindigkeit der Filamentablage. Gemäß einer Ausführungsvariante der Erfindung ist die Strömungsgeschwindigkeit des Gasstroms (Luftstroms) etwas höher als die Fördergeschwindigkeit der Filamentablage, und zwar vorzugsweise maximal 20 %, bevorzugt maximal 15 % und sehr bevorzugt maximal 10 % höher als die Fördergeschwindigkeit der Filamentablage.It is within the scope of the invention that the flow velocity of the gas stream (air stream) corresponds to at least half the conveying speed of the filament deposit, preferably at least 80%, preferably at least 90% and very preferably at least 95% of the conveying speed of the filament deposit. According to a particularly preferred embodiment, the flow velocity of the gas stream (air stream) corresponds at least to the conveying speed or approximately the conveying speed of the filament deposit. According to one embodiment variant of the invention, the flow velocity of the gas stream (air stream) is slightly higher than the conveying speed of the filament deposit, preferably at most 20%, preferably at most 15% and very preferably at most 10% higher than the conveying speed of the filament deposit.

Nach sehr empfohlener Ausführungsform, der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, wird die Filamentablage in der Verfestigungseinrichtung mit zumindest einem fluiden Medium, vorzugsweise mit zumindest einem heißen fluiden Medium verfestigt. Es liegt dabei im Rahmen der Erfindung, dass die Filamentablage in der Verfestigungseinrichtung mit dem heißen fluiden Medium mit der Maßgabe beaufschlagt wird, dass die Filamentablage gegen die Fördereinrichtung bzw. gegen ein gasdurchlässiges Siebband gedrückt wird. Dabei erfolgt zweckmäßigerweise eine Querbeaufschlagung der Filamentablagenoberfläche durch die Kräfte des heißen fluiden Mediums. Hierdurch wird die Filamentablage an die Fördereinrichtung bzw. an das Siebband angepresst. Es liegt im Rahmen der Erfindung, dass das heiße fluide Medium die Filamentablage und das gasdurchlässige Siebband durchströmt. Diese Verfestigung erfolgt vorzugsweise in einer Verfestigungskammer, durch die die Fördereinrichtung bzw. das Siebband mit der Filamentablage geführt wird. Zweckmäßigerweise wird die Verfestigung als Heißluftverfestigung durchgeführt. Das fluide Medium strömt in der Verfestigungseinrichtung vorzugsweise senkrecht zur Oberfläche der Filamentablage und bevorzugt von oben auf die Filamentablage. Es liegt dabei im Rahmen der Erfindung, dass die Filamentablage von dem fluiden Medium, vorzugsweise von dem heißen fluiden Medium flächenmäßig (d. h. nicht nur linienförmig) beaufschlagt wird.After a highly recommended embodiment, which is of very particular importance in the context of the invention, the filament deposit is solidified in the solidification device with at least one fluid medium, preferably with at least one hot fluid medium. It is within the scope of the invention that the filament deposit in the solidification device with the hot fluid medium is acted upon with the proviso that the filament tray is pressed against the conveyor or against a gas-permeable screen belt. In this case, a transverse loading of the Filamentablagenoberfläche is advantageously carried out by the forces of the hot fluid medium. As a result, the Filamentablage to the conveyor or to the Pressed sieve belt. It is within the scope of the invention that the hot fluid medium flows through the Filamentablage and the gas-permeable screen belt. This solidification is preferably carried out in a solidification chamber, through which the conveyor or the screen belt is guided with the filament tray. Appropriately, the solidification is carried out as hot air solidification. The fluid medium preferably flows in the solidification device perpendicular to the surface of the filament deposit and preferably from above onto the filament deposit. It is within the scope of the invention that the Filamentablage of the fluid medium, preferably from the hot fluid medium in terms of area (ie, not only linear) is applied.

Nach einer sehr bevorzugten Ausführungsform der Erfindung wird der an der Oberfläche der Filamentablage entlangströmende Gasstrom mittels des in der Verfestigungseinrichtung strömenden fluiden Mediums erzeugt. Mit anderen Worten ist das in der Verfestigungseinrichtung strömende fluide Medium (vorzugsweise die dort strömende Heißluft) die treibende Kraft für die Erzeugung des an der Oberfläche der Filamentablage entlangströmenden Gasstroms. Es liegt dabei im Rahmen der Erfindung, dass der erfindungsgemäße entlangströmende Gasstrom zumindest im Wesentlichen durch einen Venturi-Effekt erzeugt wird.According to a very preferred embodiment of the invention, the gas stream flowing along the surface of the filament deposit is produced by means of the fluid medium flowing in the solidification device. In other words, the fluid medium flowing in the solidification device (preferably the hot air flowing there) is the driving force for the generation of the gas flow flowing along the surface of the filament deposit. It is within the scope of the invention that the gas stream flowing along according to the invention is generated at least essentially by a Venturi effect.

Gemäß einer anderen bevorzugten Ausführungsvariante der Erfindung wird in den Bereich hinter dem Saugbereich Gas eingeblasen und/oder eingesaugt und mit Hilfe zumindest einer Strömungsleitvorrichtung zu dem an der Oberfläche der Filamentablage entlangströmenden Gasstrom umgelenkt. Bei der zumindest einen Strömungsleitvorrichtung handelt es sich vorzugsweise um ein Strömungsleitblech bzw. um ein gekrümmtes Strömungsleitblech.According to another preferred embodiment variant of the invention, gas is injected and / or sucked into the region behind the suction region and deflected by means of at least one flow-guiding device to the gas flow flowing along the surface of the filament deposit. The at least one flow-guiding device is preferably a flow guide plate or a curved flow guide plate.

Gegenstand der Erfindung ist auch eine Vorrichtung zur Herstellung eines Spinnvlieses aus Endlosfilamenten, die zumindest zum Teil eine natürliche Kräuselung aufweisen, mit zumindest einer Spinneinrichtung zur Erzeugung von Filamenten und mit einer Fördereinrichtung mit einem Ablagebereich, in dem die Filamente zur Filamentablage ablegbar sind, wobei weiterhin eine Verfestigungseinrichtung zur Verfestigung der Filamente vorgesehen ist
und wobei zumindest eine Erzeugungseinrichtung vorhanden ist, mit der ein zwischen Ablagebereich und Verfestigungseinrichtung an der Oberfläche der Filamentablage in Förderrichtung der Filamentablage entlangströmender Gasstrom erzeugbar ist. Vorzugsweise strömt dieser erfindungsgemäße Gasstrom in Förderrichtung hinter dem Saugbereich an der Oberfläche der Filamentablage entlang und zwar bevorzugt bis zu der Verfestigungseinrichtung.The invention also provides a device for producing a spunbonded nonwoven filament which, at least in part, is a natural one Having crimp, with at least one spinning device for the production of filaments and with a conveyor with a storage area in which the filaments for Filamentablage can be stored, further comprising a solidification device for solidifying the filaments
and wherein at least one generating device is provided, with which a gas flow flowing along between the depositing area and the solidifying device on the surface of the filament deposit in the conveying direction of the filament deposit can be generated. Preferably, this gas stream according to the invention flows in the conveying direction behind the suction region along the surface of the filament deposit, preferably up to the solidification device.

Es liegt im Rahmen der Erfindung, dass zwischen der Spinneinrichtung und dem Ablagebereich eine Verstreckeinrichtung zum Verstrecken der Filamente angeordnet ist. Fernerhin liegt es im Rahmen der Erfindung, dass zwischen Spinneinrichtung und Verstreckeinrichtung eine Kühleinrichtung angeordnet ist. Gemäß einer Ausführungsvariante wird eine kombinierte Kühl- und Verstreckeinrichtung eingesetzt. Nach einer besonders bevorzugten Ausführungsform der Erfindung ist zwischen der Verstreckeinrichtung und dem Ablagebereich ein Diffusor für die Ablage der Filamente vorgesehen. Diesem Diffusor kommt im Rahmen der Erfindung besondere Bedeutung zu. Zweckmäßigerweise weist der Diffusor zum Ablagebereich hin divergierende Diffusorwände auf.It is within the scope of the invention that between the spinning device and the storage area, a stretching device for stretching the filaments is arranged. Furthermore, it is within the scope of the invention that a cooling device is arranged between the spinning device and drawing device. According to one embodiment, a combined cooling and stretching device is used. According to a particularly preferred embodiment of the invention, a diffuser for filing the filaments is provided between the drawing device and the storage area. This diffuser is of particular importance in the context of the invention. Expediently, the diffuser has diverging diffuser walls towards the storage area.

Der Erfindung liegt die Erkenntnis zugrunde, dass mit dem erfindungsgemäßen Verfahren und mit der erfindungsgemäßen Vorrichtung dicke bzw. voluminöse Spinnvliese hergestellt werden können, die sich nichtsdestoweniger durch homogene Eigenschaften und eine homogene bzw. gleichmäßige Struktur auszeichnen. Im Ergebnis können Spinnvliese mit optimalen Eigenschaften und mit optimaler Qualität hergestellt werden. Hervorzuheben ist auch, dass diese Spinnvliese entsprechender Dicke und Homogenität reproduzierbar erzeugt werden können. Zu betonen ist weiterhin, dass das erfindungsgemäße Verfahren im Hinblick auf die erzielten beachtlichen Vorteile mit relativ geringem Aufwand führbar ist und insoweit auch nur einen verhältnismäßig geringen Kostenaufwand verursacht. Bestehende Vorrichtungen lassen sich problemlos mit den erfindungsgemäßen Komponenten nachrüsten.The invention is based on the finding that with the method according to the invention and with the device according to the invention thick or voluminous spunbonded nonwovens can be produced, which nonetheless are characterized by homogeneous properties and a homogeneous or uniform structure. As a result, spunbonded fabrics with optimal properties and be produced with optimal quality. It should also be emphasized that these spunbonded nonwovens of corresponding thickness and homogeneity can be reproducibly produced. It should also be emphasized that the method according to the invention can be carried out with relatively little effort in view of the considerable advantages achieved, and in so far only causes a relatively low cost. Existing devices can be easily retrofitted with the components according to the invention.

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

Fig.1
einen Schnitt durch einen Teil einer erfindungsgemäßen Vorrichtung,
Fig. 2
einen Schnitt durch einen anderen Teil der erfindungsgemäßen Vorrichtung,
Fig. 3
eine besondere Ausführungsform des Gegenstandes gemäß Fig. 2 und
Fig. 4
eine weitere Ausführungsform des Gegenstandes nach Fig. 2.
The invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. In a schematic representation:
Fig.1
a section through a part of a device according to the invention,
Fig. 2
a section through another part of the device according to the invention,
Fig. 3
a particular embodiment of the article according to Fig. 2 and
Fig. 4
a further embodiment of the article according to Fig. 2 ,

Die Figuren zeigen eine Vorrichtung zur Durchführung eines Verfahrens zur Herstellung eines Spinnvlieses aus Endlosfilamenten, wobei Filamente 1 erzeugt werden, von denen zumindest ein Teil eine natürliche Kräuselung aufweist. Bei dem Spinnvlies mag es sich gemäß einer Ausführungsform um ein einlagiges Spinnvlies handeln, das entweder ausschließlich aus Filamenten mit natürlicher Kräuselung besteht oder aus einer Mischung aus Filamenten mit natürlicher Kräuselung und nicht-kräuselnden Filamenten. Der Anteil der Filamente mit natürlicher Kräuselung beträgt dabei vorzugsweise zumindest 20 Gew.-%, bevorzugt zumindest 30 Gew.-%. Im Rahmen des erfindungsgemäßen Verfahrens kann auch ein mehrlagiges Spinnvlies hergestellt werden, bei dem zumindest eine Lage (wie vorstehend beschrieben) Filamente mit natürlicher Kräuselung aufweist.The figures show an apparatus for carrying out a method for producing a spunbonded nonwoven filament, wherein filaments 1 are produced, of which at least a part has a natural crimp. The spunbonded web may, according to one embodiment, be a monolayer spunbonded web consisting either exclusively of natural crimp filaments or of a blend of natural crimp filaments and non-crimping filaments. The share of Filaments with natural crimp is preferably at least 20 wt .-%, preferably at least 30 wt .-%. In the context of the method according to the invention, it is also possible to produce a multilayer spunbonded nonwoven fabric in which at least one layer (as described above) has natural crimp filaments.

In Fig. 1 ist erkennbar, dass die erfindungsgemäße Vorrichtung eine Spinneinrichtung 2 zur Erzeugung der Filamente 1 aufweist sowie zweckmäßigerweise eine unterhalb der Spinneinrichtung 2 angeordnete Kühlkammer 3, in die Prozessluft zur Kühlung der Filamente 1 einführbar ist. Es ist fernerhin eine Verstreckeinrichtung 4 zur aerodynamischen Verstreckung der Filamente 1 vorgesehen. Unterhalb der Verstreckeinrichtung 4 ist bevorzugt und im Ausführungsbeispiel ein Diffusor 5 angeordnet, der lediglich schematisch angedeutet wurde. Unterhalb der Verstreckeinrichtung 4 kann beispielsweise auch eine Verlegeeinheit aus zwei hintereinander geschalteten Diffusoren vorgesehen sein. Unterhalb des Diffusors 5 ist eine als luftdurchlässiges Siebband 6 ausgebildete Fördereinrichtung vorgesehen. In einem Ablagebereich 7 dieses Siebbandes 6 werden die Filamente 1 zur Filamentablage 8 abgelegt. Im Ausführungsbeispiel ist die Filamentablage 8 aus Filamenten 1 mit natürlicher Kräuselung gebildet, wobei es sich bei den Filamenten 1 vorzugsweise um Bikomponentenfilamente mit Seite-an-Seite-Anordnung handelt. Nach dem Verstrecken bzw. unterhalb der Verstreckeinrichtung 4 findet im Diffusor 5 eine erste Kräuselung (primäre Kräuselung) dieser Filamente 1 statt. Die Filamentablage 8 wird in den Figuren mit dem Siebband 6 nach links in Richtung einer Verfestigungseinrichtung 9 befördert. In dem vergrößerten Abschnitt der Fig. 2 ist dargestellt worden, dass die Filamentablage 8 als schindelförmige Ablage aufgebaut ist. Neu abgelegte Filamente 1 werden hier auf schon früher abgelegte Filamente 1 gelegt und auf diese Weise entsteht gleichsam eine schindelförmige Ablage.In Fig. 1 It can be seen that the device according to the invention has a spinning device 2 for producing the filaments 1 and expediently a cooling chamber 3 arranged below the spinning device 2, into which process air for cooling the filaments 1 can be inserted. Furthermore, a drawing device 4 for aerodynamic stretching of the filaments 1 is provided. Below the stretching device 4, a diffuser 5 is preferably arranged and in the exemplary embodiment, which was indicated only schematically. Below the stretching device 4, for example, a laying unit of two successively connected diffusers can be provided. Below the diffuser 5 as an air-permeable screen belt 6 formed conveyor is provided. In a storage area 7 of this screen belt 6, the filaments 1 are deposited to Filamentablage 8. In the exemplary embodiment, the filament tray 8 is formed from filaments 1 with natural crimping, wherein the filaments 1 are preferably bicomponent filaments with side-by-side arrangement. After stretching or below the drawing device 4, a first crimping (primary crimping) of these filaments 1 takes place in the diffuser 5. The filament tray 8 is conveyed in the figures with the screen belt 6 to the left in the direction of a solidification device 9. In the enlarged section of the Fig. 2 It has been shown that the filament tray 8 is constructed as a shingled tray. Newly deposited filaments 1 are placed here on previously deposited filaments 1 and in this way arises as it were a shingled tray.

In einem Saugbereich 10 des Siebbandes 6 wird die Filamentablage 8 mit Saugluft beaufschlagt. Mit anderen Worten wird vorzugsweise mit einer nicht dargestellten Saugvorrichtung von unten Luft durch das Siebband 6 gesaugt und dadurch werden die Filamente 1 bzw. die Filamentablage 8 gleichsam auf das Siebband 6 gesaugt. Hierdurch erfolgt eine gewisse Stabilisierung der Filamentablage 8. Der Saugbereich 10 erstreckt sich über den Ablagebereich 7 für die Filamente 1 bis in einen in Förderrichtung hinter dem Ablagebereich 7 angeordneten Bereich 11. Durch die Saugluftbeaufschlagung wird die Filamentablage 8 in diesem Saugbereich 10 auf dem Siebband 6 fixiert und niedergehalten, so dass die Filamentablage 8 eine relativ geringe Dicke aufweist (beispielsweise eine Dicke von 2 bis 3 mm). Wenn die Filamentablage 8 bei weiterer Förderung mit dem Siebband 6 den Saugbereich 10 verlässt, springt die Filamentablage 8 insbesondere aufgrund einer weiteren Kräuselung (sekundäre Kräuselung) auf und es resultiert eine Filamentablage 8 mit wesentlich höherer Dicke (beispielsweise mit einer Dicke von ca. 3 cm). Dieses "Aufspringen" wird in den Fig. 2 bis 4 durch eine entsprechende Dickenzunahme der Filamentablage 8 angedeutet. Mit dem Aufspringen der Filamentablage 8 können insbesondere zwei nachteilhafte Effekte verbunden sein. Zunächst können Schrumpfkräfte der sekundären Kräuselung die gleichmäßige Struktur der Filamentablage 8 zerstören. Außerdem können Luftkräfte die Filamentablage 7 gleichsam öffnen, da die Filamentablage 8 mit Siebbandgeschwindigkeit gegen stehende Umgebungsluft bewegt wird. Dieses Öffnen kann insbesondere aufgrund der in dem vergrößerten Abschnitt von Fig. 2 dargestellten schindelförmigen Ablage auftreten.In a suction region 10 of the screen belt 6, the filament tray 8 is acted upon with suction air. In other words, preferably with a suction device, not shown, sucked air from below through the wire 6 and thereby the filaments 1 and the filament tray 8 are sucked onto the screen belt 6 as it were. The suction region 10 extends over the deposition region 7 for the filaments 1 into a region 11 arranged downstream of the deposition region 7 in the conveying direction. The filament deposition 8 in this suction region 10 on the screen belt 6 becomes due to the introduction of the suction air fixed and held down, so that the filament tray 8 has a relatively small thickness (for example, a thickness of 2 to 3 mm). If the filament tray 8 leaves the suction area 10 during further conveyance with the wire belt 6, the filament tray 8 springs in particular because of a further crimping (secondary crimping) and results in a filament tray 8 with a substantially higher thickness (for example with a thickness of about 3 cm ). This "popping up" is in the Fig. 2 to 4 indicated by a corresponding increase in thickness of the filament tray 8. In particular, two disadvantageous effects can be associated with the popping up of the filament deposit 8. First, secondary crimp shrinkage forces may destroy the uniform structure of the filament tray 8. In addition, air forces can open the Filamentablage 7 as it were, since the Filamentablage 8 is moved at Siebbandgeschwindigkeit against ambient air. This opening, in particular due to the enlarged portion of Fig. 2 Shingled tray occur occur.

Erfindungsgemäß wird nun im Bereich des Aufspringens der Filamentablage 8 bzw. im Bereich der sekundären Kräuselung ein in Förderrichtung der Filamentablage 8 an der Oberfläche der Filamentablage 8 entlangströmender Gasstrom erzeugt, der in den Figuren durch einen Pfeil G angedeutet ist. Dieser Gasstrom G strömt in Förderrichtung der Filamentablage 8 hinter dem Saugbereich 10 an der Oberfläche der Filamentablage 8 entlang. Der Erfindung liegt die Erkenntnis zugrunde, dass durch diesen erfindungsgemäßen Gasstrom G die aufgesprungene Filamentablage 8 stabilisiert werden kann und den beiden vorstehend geschilderten negativen Effekten auf die Filamentablage 8 funktionssicher und effektiv entgegengewirkt werden kann. Vorzugsweise beträgt die Strömungsgeschwindigkeit dieses Gasstromes G mindestens der Fördergeschwindigkeit der Filamentablage 8 bzw. der Siebbandgeschwindigkeit oder die Strömungsgeschwindigkeit des Gasstromes G ist etwas höher als die Fördergeschwindigkeit der Filamentablage 8 bzw. als die Siebbandgeschwindigkeit.According to the invention, a gas stream flowing along the surface of the filament deposit 8 in the conveying direction of the filament deposit 8 is now generated in the region of the springing up of the filament deposit 8 or in the region of the secondary ruffling, which is indicated by an arrow G in the figures. This gas stream G flows in the conveying direction of the filament tray 8 behind the suction area 10 the surface of the filament tray 8 along. The invention is based on the finding that by means of this gas stream G according to the invention the chopped filament deposit 8 can be stabilized and the two above-described negative effects on the filament deposit 8 can be reliably and effectively counteracted. Preferably, the flow velocity of this gas stream G is at least the conveying speed of the filament deposit 8 or the wire belt speed or the flow velocity of the gas stream G is slightly higher than the conveying speed of the filament deposit 8 or as the wire belt speed.

Die Filamentablage 8 wird mit dem Siebband 6 in eine Verfestigungskammer 12 eingeleitet, in der vorzugsweise eine Verfestigung der Filamentablage 8 mit einem heißen fluiden Medium, vorzugsweise eine Heißluftverfestigung erfolgt. Das heiße fluide Medium bzw. die Heißluft strömt dabei von oben senkrecht zur Oberfläche der Filamentablage 8 flächig auf die Filamentablage 8. Das wird durch entsprechende Pfeile in den Fig. 2 bis 4 schematisch angedeutet.The filament tray 8 is introduced with the screen belt 6 in a solidification chamber 12, in which preferably a solidification of the filament tray 8 with a hot fluid medium, preferably a hot air solidification takes place. The hot fluid medium or the hot air flows from above perpendicular to the surface of the filament tray 8 surface on the filament tray 8. This is indicated by corresponding arrows in the Fig. 2 to 4 indicated schematically.

Die Fig. 3 zeigt eine besondere Ausführungsform zur Erzeugung eines erfindungsgemäßen Gasstromes G. Hier ist eine obere Abdeckung 13 vorgesehen und der Gasstrom G strömt zwischen dieser Abdeckung 13 und dem Siebband 6 bzw. der Oberfläche der Filamentablage 8 in Richtung Verfestigungseinrichtung 9. Die Abdeckung 13 ist dabei zweckmäßigerweise parallel oder im Wesentlichen parallel zum Siebband 6 bzw. zur Oberfläche der Filamentablage 8 angeordnet. Nach bevorzugter Ausführungsform und im Ausführungsbeispiel nach Fig. 3 wird der an der Oberfläche der Filamentablage 8 entlangströmende Gasstrom G mittels des in der Verfestigungseinrichtung 9 strömenden fluiden Mediums erzeugt. Mit anderen Worten bildet das in der Verfestigungskammer 12 strömende fluide Medium die treibende Kraft für den Gasstrom G.The Fig. 3 shows a particular embodiment for generating a gas stream according to the invention G. Here, an upper cover 13 is provided and the gas stream G flows between this cover 13 and the wire 6 and the surface of the filament tray 8 in the direction of solidification device 9. The cover 13 is expediently parallel or arranged substantially parallel to the wire belt 6 or to the surface of the filament tray 8. According to a preferred embodiment and in the embodiment according to Fig. 3 the gas flow G flowing along the surface of the filament deposit 8 is generated by means of the fluid medium flowing in the solidification device 9. In other words, the fluid medium flowing in the solidification chamber 12 constitutes the driving force for the gas flow G.

In Fig. 4 ist eine weitere bevorzugte Ausführungsform darstellt. Hier wird Luft von oben in den Bereich der sekundären Kräuselung (Bereich der aufgesprungenen Filamentablage) eingeblasen. Mit Hilfe von entsprechend gebogenen Strömungsleitblechen 14 wird das eingeblasene Gas zu dem an der Oberfläche der Filamentablage 8 entlangströmenden Gasstrom G umgelenkt. Das Gas kann hier im Übrigen auch angesaugt werden.In Fig. 4 is another preferred embodiment represents. Here, air is blown from above into the area of the secondary crimping (area of the opened filament deposit). With the aid of correspondingly curved flow guide plates 14, the injected gas is deflected to the gas flow G flowing along the surface of the filament deposit 8. Incidentally, the gas can also be sucked in here.

Zweckmäßigerweise und im Ausführungsbeispiel strömt der Gasstrom G senkrecht oder im Wesentlichen senkrecht zur Strömungsrichtung des fluiden Mediums in der Verfestigungseinrichtung 9 bzw. in der Verfestigungskammer 12. - Gemäß einer bevorzugten Ausführungsvariante und im Ausführungsbeispiel nach den Figuren ist im Übrigen nur ein einziges luftdurchlässiges Siebband 6 vorgesehen, mit dem Filamentablage 8 von dem Ablagebereich 7 über den Bereich 11 und über den Bereich der Sekundärkräuselung (Bereich der aufgesprungenen Filamentablage 8) in die Verfestigungskammer 12 befördert wird. Das Siebband 6 wird dabei in üblicher Weise als Endlosband über entsprechende Umlenkrollen geführt.Expediently and in the exemplary embodiment, the gas stream G flows perpendicularly or substantially perpendicular to the flow direction of the fluid medium in the solidification device 9 or in the solidification chamber 12. According to a preferred embodiment and in the exemplary embodiment according to the figures, only a single air-permeable screen belt 6 is provided in which the filament tray 8 is conveyed from the depositing area 7 over the area 11 and over the area of the secondary crimping (area of the opened filament tray 8) into the hardening chamber 12. The screen belt 6 is guided in the usual way as an endless belt via corresponding pulleys.

Von besonderer Bedeutung ist im Rahmen der Erfindung eine bevorzugte Ausführungsform, die in der Fig. 1 schematisch dargestellt ist. Danach ist das Aggregat aus Kühlkammer 3, Verstreckeinrichtung 4 und Diffusor 5, abgesehen von einer Luftzuführung in der Kühlkammer 3 und abgesehen von zumindest einem Lufteintritt im Bereich des Diffusors 5 als geschlossenes System ausgebildet. Mit anderen Worten ist das Aggregat aus Kühlkammer 3 und Verstreckeinrichtung, abgesehen von der Luftzuführung in der Kühlkammer 3 geschlossen ausgeführt. Diese geschlossene Ausführungsform der Vorrichtung hat sich im Hinblick auf eine optimale Spinnvliesqualität ganz besonders bewährt, und zwar insbesondere in Kombination mit den hier beanspruchten weiteren erfindungsgemäßen Merkmalen.Of particular importance in the context of the invention is a preferred embodiment, which in the Fig. 1 is shown schematically. Thereafter, the aggregate of cooling chamber 3, stretching device 4 and diffuser 5, apart from an air supply in the cooling chamber 3 and apart from at least one air inlet in the region of the diffuser 5 is formed as a closed system. In other words, the aggregate of cooling chamber 3 and stretching device, apart from the air supply in the cooling chamber 3 is executed closed. This closed embodiment of the device has proven to be particularly suitable with regard to an optimal spunbonded quality, in particular in combination with the further inventive features claimed here.

Claims (13)

Verfahren zur Herstellung eines Spinnvlieses aus Endlosfilamenten, wobei Filamente (1) erzeugt werden, von denen zumindest ein Teil eine natürliche Kräuselung aufweist,
wobei die Filamente (1) im Ablagebereich (7) einer Fördereinrichtung zur Filamentablage (8) abgelegt werden und wobei die Filamentablage (8) mit der Fördereinrichtung in Richtung einer Verfestigungseinrichtung (9) befördert wird
und wobei ein in Förderrichtung der Filamentablage (8) an der Oberfläche der Filamentablage (8) entlangströmender Gasstrom (G) erzeugt wird.Method of producing a spunbonded nonwoven filament, wherein filaments (1) are produced, at least part of which has a natural crimp,
wherein the filaments (1) in the storage area (7) of a conveyor for Filamentablage (8) are stored and wherein the Filamentablage (8) with the conveyor in the direction of a solidification device (9) is conveyed
and wherein a gas flow (G) flowing along the surface of the filament tray (8) in the conveying direction of the filament tray (8) is produced. Verfahren nach Anspruch 1, wobei die Filamente (1) mit natürlicher Kräuselung Bikomponentenfilamente bzw. Mehrkomponentenfilamente sind, die vorzugsweise eine Seite-an-Seite-Anordnung aufweisen.The method of claim 1, wherein the natural crimp filaments (1) are bicomponent filaments, preferably having a side-by-side arrangement. Verfahren nach einem der Ansprüche 1 oder 2, wobei eine Kräuselung der Filamente (1) nach einem Verstrecken der Filamente (1) und vor der Ablage der Filamente (1) stattfindet.Method according to one of claims 1 or 2, wherein a crimping of the filaments (1) takes place after a stretching of the filaments (1) and before the filaments (1) are deposited. Verfahren nach einem der Ansprüche 1 bis 3, wobei eine Kräuselung der Filamente (1) nach der Ablage der Filamente (1) stattfindet.Method according to one of claims 1 to 3, wherein a crimping of the filaments (1) after filing of the filaments (1) takes place. Verfahren nach einem der Ansprüche 1 bis 4, wobei die Filamente (1) auf einem Siebband (6) als Fördereinrichtung oder als Bestandteil einer Fördereinrichtung zur Filamentablage (8) abgelegt werden und wobei die Filamentablage (8) in einem Saugbereich (10) des Siebbandes (6) mit Saugluft beaufschlagt wird.Method according to one of claims 1 to 4, wherein the filaments (1) on a wire belt (6) as a conveyor or as part of a conveyor for Filamentablage (8) are stored and wherein the Filamentablage (8) in a suction region (10) of the screen belt (6) is supplied with suction air. Verfahren nach einem der Ansprüche 1 bis 5, wobei der Gasstrom (G) in Förderrichtung hinter dem Saugbereich (10) an der Oberfläche der Filamentablage (8) vorbeiströmt.Method according to one of claims 1 to 5, wherein the gas stream (G) in the conveying direction behind the suction area (10) flows past the surface of the filament tray (8). Verfahren nach einem der Ansprüche 1 bis 6, wobei die Strömungsgeschwindigkeit des Gasstroms (G) mindestens der Hälfte der Fördergeschwindigkeit der Filamentablage (8) entspricht und vorzugsweise mindestens der Fördergeschwindigkeit oder in etwa der Fördergeschwindigkeit der Filamentablage (8) entspricht.Method according to one of claims 1 to 6, wherein the flow rate of the gas stream (G) corresponds to at least half the conveying speed of the filament tray (8) and preferably at least the conveying speed or approximately the conveying speed of the filament tray (8). Verfahren nach einem der Ansprüche 1 bis 7, wobei die Filamentablage (8) mit zumindest einem fluiden Medium, vorzugsweise mit zumindest einem heißen fluiden Medium verfestigt wird.Method according to one of claims 1 to 7, wherein the filament shelf (8) is solidified with at least one fluid medium, preferably with at least one hot fluid medium. Verfahren nach einem der Ansprüche 1 bis 8, wobei der an der Oberfläche der Filamentablage (8) entlangströmende Gasstrom (G) mittels des in der Verfestigungseinrichtung (9) strömenden fluiden Mediums erzeugt wird.Method according to one of claims 1 to 8, wherein the on the surface of the Filamentablage (8) along flowing gas flow (G) by means of in the solidification device (9) flowing fluid medium is generated. Verfahren nach einem der Ansprüche 1 bis 9, wobei Gas eingeblasen und/oder eingesaugt wird und mit Hilfe zumindest einer Strömungsleitvorrichtung zu dem an der Oberfläche der Filamentablage (8) entlangströmenden Gasstrom (G) umgelenkt wird.Method according to one of claims 1 to 9, wherein gas is injected and / or sucked in and is deflected by means of at least one Strömungsleitvorrichtung to the on the surface of the Filamentablage (8) along the flowing gas stream (G). Vorrichtung zur Herstellung eines Spinnvlieses aus Endlosfilamenten, die zumindest zum Teil eine natürliche Kräuselung aufweisen, mit zumindest einer Spinneinrichtung (2) zur Erzeugung von Filamenten (1) und mit einer Fördereinrichtung mit einem Ablagebereich (7), in dem die Filamente (1) zur Filamentablage (8) ablegbar sind, wobei weiterhin eine Verfestigungseinrichtung (9) zur Verfestigung der Filamente (1) vorgesehen ist
und wobei zumindest eine Erzeugungseinrichtung vorhanden ist, mit der ein zwischen Ablagebereich (7) und Verfestigungseinrichtung (9) an der Oberfläche der Filamentablage (8) in Förderrichtung der Filamentablage (8) entlangströmender Gasstrom (G) erzeugbar ist.Apparatus for producing a spunbonded nonwoven fabric from continuous filaments, which at least partially have a natural crimp, with at least one spinning device (2) for producing filaments (1) and with a conveying device with a depositing region (7) in which the filaments (1) for Filamentablage (8) can be deposited, further comprising a solidification device (9) for solidifying the filaments (1) is provided
and wherein at least one generating device is provided with which a gas stream (G) flowing along between the depositing area (7) and hardening device (9) on the surface of the filament tray (8) in the conveying direction of the filament tray (8) can be produced. Vorrichtung nach Anspruch 11, wobei zwischen Spinneinrichtung (2) und dem Ablagebereich (7) eine Verstreckeinrichtung (4) zum Verstrecken der Filamente (1) angeordnet ist.Apparatus according to claim 11, wherein between the spinning device (2) and the storage area (7) a stretching device (4) for stretching the filaments (1) is arranged. Vorrichtung nach einem der Ansprüche 11 oder 12, wobei zwischen der Verstreckeinrichtung (4) und dem Ablagebereich (7) ein Diffusor (5) angeordnet ist.Device according to one of claims 11 or 12, wherein between the drawing device (4) and the storage area (7) a diffuser (5) is arranged.
EP06025192A 2006-12-06 2006-12-06 Method and apparatus for making a spunbonded nonwoven fabric Active EP1930492B1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
PL06025192T PL1930492T3 (en) 2006-12-06 2006-12-06 Method and apparatus for making a spunbonded nonwoven fabric
ES06025192T ES2352508T3 (en) 2006-12-06 2006-12-06 PROCEDURE AND DEVICE FOR THE PRODUCTION OF SPINNING VELO BY ADHESION.
DK06025192.3T DK1930492T3 (en) 2006-12-06 2006-12-06 Method and apparatus for making a spinning nonwoven fabric
EP06025192A EP1930492B1 (en) 2006-12-06 2006-12-06 Method and apparatus for making a spunbonded nonwoven fabric
DE502006007979T DE502006007979D1 (en) 2006-12-06 2006-12-06 Method and device for producing a spunbonded nonwoven
AT06025192T ATE483052T1 (en) 2006-12-06 2006-12-06 METHOD AND DEVICE FOR PRODUCING A SPUNNED WEB
CA2612854A CA2612854C (en) 2006-12-06 2007-11-28 Method and device for producing a nonwoven
IL187752A IL187752A (en) 2006-12-06 2007-11-29 Method and device for producing a nonwoven
US11/998,444 US9453292B2 (en) 2006-12-06 2007-11-29 Method and apparatus for making a spunbond
ARP070105359A AR064079A1 (en) 2006-12-06 2007-11-30 PROCEDURE FOR PRODUCING NON-WOVEN TEXTILE MATERIAL FROM CONTINUOUS FILAMENTS
JP2007313481A JP4827827B2 (en) 2006-12-06 2007-12-04 Method and apparatus for producing non-woven fabrics
RU2007145228/12A RU2361974C1 (en) 2006-12-06 2007-12-05 Method and device for preparing spun bonded non-woven material
KR1020070125390A KR101031801B1 (en) 2006-12-06 2007-12-05 Method and device for producing a nonwoven
BRPI0704633A BRPI0704633B1 (en) 2006-12-06 2007-12-06 method and device for producing unbraided fabrics
MX2007015405A MX2007015405A (en) 2006-12-06 2007-12-06 Method and device for producing a nonwoven .
CN2007101800983A CN101220543B (en) 2006-12-06 2007-12-06 Method and apparatus for making a nonwoven fabric

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AR (1) AR064079A1 (en)
AT (1) ATE483052T1 (en)
BR (1) BRPI0704633B1 (en)
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DE (1) DE502006007979D1 (en)
DK (1) DK1930492T3 (en)
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EP3385423A1 (en) 2017-04-06 2018-10-10 FARE' S.p.A. A process and an apparatus for the production of a voluminous nonwoven fabric
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CN101220543B (en) 2011-02-02
BRPI0704633B1 (en) 2017-05-02
ATE483052T1 (en) 2010-10-15
JP2008144344A (en) 2008-06-26
US9453292B2 (en) 2016-09-27
JP4827827B2 (en) 2011-11-30
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CA2612854C (en) 2011-09-20
MX2007015405A (en) 2008-10-28
IL187752A0 (en) 2008-03-20
CA2612854A1 (en) 2008-06-06
DE502006007979D1 (en) 2010-11-11
DK1930492T3 (en) 2011-01-10
US20090152757A1 (en) 2009-06-18
CN101220543A (en) 2008-07-16
PL1930492T3 (en) 2011-03-31
RU2361974C1 (en) 2009-07-20
IL187752A (en) 2011-02-28
KR20080052436A (en) 2008-06-11
KR101031801B1 (en) 2011-04-29
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BRPI0704633A (en) 2008-07-22
AR064079A1 (en) 2009-03-11

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