EP1402099B1 - Method for producing bonded non-wovens from at least partially microfine continuous fibres and non-wovens thereby produced - Google Patents

Method for producing bonded non-wovens from at least partially microfine continuous fibres and non-wovens thereby produced Download PDF

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Publication number
EP1402099B1
EP1402099B1 EP02735401A EP02735401A EP1402099B1 EP 1402099 B1 EP1402099 B1 EP 1402099B1 EP 02735401 A EP02735401 A EP 02735401A EP 02735401 A EP02735401 A EP 02735401A EP 1402099 B1 EP1402099 B1 EP 1402099B1
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EP
European Patent Office
Prior art keywords
fibers
microfibers
endless
spun
nonwoven
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.)
Revoked
Application number
EP02735401A
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German (de)
French (fr)
Other versions
EP1402099A1 (en
Inventor
Lüder GERKING
Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Application filed by Fleissner GmbH filed Critical Fleissner GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D01D4/025—Melt-blowing or solution-blowing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
    • 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
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/62—Including another chemically different microfiber in a separate layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/621—Including other strand or fiber material in a different layer not specified as having microdimensions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y10T442/626—Microfiber is synthetic polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Definitions

  • This fiber production process has considerable advantages over the prior art Technique using the meltblown process, which also produces microfibers.
  • the threads are very fine, they have an average diameter of about 2 microns and even with this diameter are essentially endless. Since she is not like that Meltblown process by a hot air stream, they are stretched not thermally damaged and have a high strength.
  • the threads can off made of any polymer but also from solutions according to the lyocell process become.
  • Microfibers are also called split fibers. They arise from threads that are made several polymers are spun and then z. B. by Water jets are split. But this microfiber manufacturing process is consuming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Multicomponent Fibers (AREA)

Abstract

A strengthened nonwoven is made at least in part of spun microfibers that are strengthened by hydrodynamic needling, alone or together with other fibers such as also staple fibers and/or endless fibers. The microfibers are spun from a polymer melt of only one certain polymer from a plurality of spinning apertures, and the spun filaments are drawn by gas streams accelerated to high velocity by an accelerating nozzle such as a Laval nozzle and, due to further production conditions, each fiber receives before solidification an internal hydrostatic pressure that is higher than the ambient gas pressure so that each fiber cracks in the longitudinal direction and splits up into a plurality of fine endless filaments.

Description

Durch die DE-A-199 29 709 ist ein Faserherstellungsverfahren bekannt, bei dem aus einer Polymerschmelze nur eines bestimmten Polymers Fäden aus einer Vielzahl von Spinnbohrungen ausgesponnen und die ausgesponnenen Fäden durch mittels einer Beschleunigungs- wie Lavaldüse auf hohe Geschwindigkeit beschleunigte im wesentlichen kalte Gasströme verzogen werden und jeder Faden aufgrund von weiteren Herstellungsbedingungen vor dem Erstarren einen hydrostatischen Innendruck erhält, der größer ist als der umgebende Gasdruck, derart, dass jeder Faden in Längsrichtung platzt und sich in eine Vielzahl feiner Endlosfäden aufspleißt. Diese endlosen Mikrofasern können anschließend fortlaufend zu einem Nonwoven beliebiger Breite abgelegt werden.From DE-A-199 29 709 a fiber production process is known in which a polymer melt of only one particular polymer threads of a variety of Spinn borings spun and the spun threads by means of a Acceleration like Laval nozzle accelerated to high speed essential cold gas flows are warped and every thread due to other production conditions before solidifying a hydrostatic Internal pressure that is greater than the surrounding gas pressure, such that each Thread bursts in the longitudinal direction and splices into a variety of fine filaments. These endless microfibers can then progressively become a nonwoven any width can be stored.

Dieses Faserherstellungsverfahren hat erhebliche Vorteile gegenüber dem Stand der Technik nach dem Meltblownverfahren, mit dem auch Mikrofasern hergestellt werden. Die Fäden sind sehr fein, sie haben im Mittel einen Durchmesser von etwa 2 µm und sind selbst bei diesem Durchmesser im wesentlichen endlos. Da sie nicht wie beim Meltblownverfahren durch einen heißen Luftstrom, verstreckt werden, sind sie thermisch nicht geschädigt und haben eine hohe Festigkeit. Die Fäden können aus jeglichem Polymer aber auch aus Lösungen nach dem Lyocell-Verfahren hergestellt werden.This fiber production process has considerable advantages over the prior art Technique using the meltblown process, which also produces microfibers. The threads are very fine, they have an average diameter of about 2 microns and even with this diameter are essentially endless. Since she is not like that Meltblown process by a hot air stream, they are stretched not thermally damaged and have a high strength. The threads can off made of any polymer but also from solutions according to the lyocell process become.

Mikrofasern sind auch sogenannte Splitfasem. Sie entstehen aus Fäden, die aus mehreren Polymeren gesponnen werden und anschließend z. B. durch Wasserstrahlen gesplittet werden. Dieses Mikrofaserherstellungsverfahren ist aber aufwendiger. Microfibers are also called split fibers. They arise from threads that are made several polymers are spun and then z. B. by Water jets are split. But this microfiber manufacturing process is consuming.

Es besteht die Notwendigkeit der Verfestigung der wie anfangs definiert hergestellten Mikrofasern.There is a need to solidify the as initially defined Microfibers.

Es ist die Idee der Erfindung dieses mit der hydrodynamischen Vernadelung zu bewirken. Diese ist hier besonders wirkungsvoll, weil diese so hergestellten sehr dünnen Endlosfasern leicht durch die Wasservernadelung verlagert und trotzt ihrer Endlosigkeit mit den benachbarten Fasern verschlungen werden können. Es entsteht ein abriebfestes Produkt, was auch gilt, wenn das Vlies nass geworden ist. Das Produkt ist nicht nur abriebfest, sondern es entsteht auch kein Pillingeffekt, da es sich um verschlungene Endlosfasern handelt, die ansonsten bei normalen Endlosfasern wegen ihrer Längsfestigkeit nur schwerlich mit Wasser verlagert werden können.It is the idea of the invention of this with the hydrodynamic needling too cause. This is particularly effective here, because these are so very produced thin continuous fibers easily displaced by the water needling and defies their Endlessness can be swallowed up with the neighboring fibers. It arises an abrasion-resistant product, which also applies when the fleece has become wet. The Product is not only abrasion resistant, but it also creates no pilling effect, since it is entangled endless fibers, which otherwise in normal continuous fibers Because of their longitudinal strength, they can hardly be shifted with water.

Die Anwendung des hydrodynamischen Vernadelns ist auf diesem Gebiet bereits mehrfach bekannt. Es wird bezüglich der schmelzgeblasenen Fasern auf die EP-A-0 333 228 und bezüglich Splitfasern auf die US-A-4 233 349 verwiesen. Im vorliegenden Fall ist die Anwendung der Wasservemadelung besonders vorteilhaft, weil das Produkt trotzt der endlosen Fasern mit Wasserstrahlen fest vernadelt werden kann, derart, dass ein Pillingeffekt beim späteren Benutzen des verfestigten Nonwoven nicht auftritt. Das Vlies hat eine weiche ganz gleichmäßige Oberfläche und kann deshalb für viele Anwendungszwecke in der Industrie mit großem Vorteil Verwendung finden.The application of hydrodynamic needling is already in this field known several times. With respect to the meltblown fibers, EP-A-0 333,228 and with regard to split fibers to US-A-4,233,349. In the present Case, the application of water needling is particularly beneficial because that Product defies the endless fibers can be firmly needled with water jets, such that a pilling effect in later use of the solidified nonwoven does not occurs. The fleece has a soft, even surface and therefore can find use for many applications in the industry with great advantage.

Claims (5)

  1. A method of manufacturing a bonded nonwoven from at least partially microfine endless fibers made from fusible polymers,
    a) by which a polymer melt of but one given polymer is spun and discharged from a plurality of spinning holes and the discharged spun filaments are stretched through high speed accelerated substantially cold gas flows by means of an accelerating nozzle such as a Laval nozzle and by which, due to further manufacturing conditions, each filament is subjected, prior to solidification, to a hydrostatic pressure that is higher than the surrounding gas pressure in such a manner that each filament bursts in the longitudinal direction, splitting into a plurality of fine endless filaments,
    b) continuously laying said microfibers to form a nonwoven of any width
    c) and permanently impinging hydrodynamic water jets on said web in order to entangle said microfibers for bonding said longitudinally split endless fibers to form said nonwoven
    d) and at need mixing and connecting them with other fibers that have already been laid beneath said microfibers and/or are laid subsequently onto said microfibers.
  2. The method according to claim 1, characterized in that the other fibers are made from natural fibers or from other synthetic fibers - such as staple and/or endless fibers.
  3. The method according to claim 1 or 2, characterized in that the other fibers are made from wood pulp fibers, at need together with the other synthetic fibers.
  4. A bonded nonwoven that is at least partially made from microfibers
    a) that are produced from a polymer melt of but one given polymer from which they are spun and discharged from a plurality of spinning holes, the discharged spun filaments being deformed through gas flows accelerated at high speed by means of an accelerating nozzle such as a Laval nozzle and each filament being subjected, due to further manufacturing conditions and prior to solidification, to a hydrostatic pressure that is higher than the surrounding gas pressure in such a manner that each filament bursts in the longitudinal direction, splitting into a plurality of fine endless filaments,
    b) and that are bonded together, either all by themselves or together with other fibers such as staple and/or endless fibers, by hydrodynamic needling.
  5. The nonwoven as set forth in claim 4, characterized in that the microfibers are laid on a carrier layer of more stable chemical fibers and serve as a separation layer for a wood pulp layer laid onto the microfibers.
EP02735401A 2001-06-07 2002-06-04 Method for producing bonded non-wovens from at least partially microfine continuous fibres and non-wovens thereby produced Revoked EP1402099B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10127471 2001-06-07
DE10127471A DE10127471A1 (en) 2001-06-07 2001-06-07 Fixed nonwoven, at least partially of micro-fine continuous fusible polymer filaments, has longitudinally split melt spun filaments laid across the material width and bonded by water jets
PCT/EP2002/006075 WO2002099176A1 (en) 2001-06-07 2002-06-04 Method for producing bonded non-wovens from at least partially microfine continuous fibres and non-wovens thereby produced

Publications (2)

Publication Number Publication Date
EP1402099A1 EP1402099A1 (en) 2004-03-31
EP1402099B1 true EP1402099B1 (en) 2005-11-30

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ID=7687382

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EP02735401A Revoked EP1402099B1 (en) 2001-06-07 2002-06-04 Method for producing bonded non-wovens from at least partially microfine continuous fibres and non-wovens thereby produced

Country Status (9)

Country Link
US (2) US20040222556A1 (en)
EP (1) EP1402099B1 (en)
JP (1) JP2004527673A (en)
CN (1) CN1330813C (en)
AT (1) ATE311493T1 (en)
DE (2) DE10127471A1 (en)
DK (1) DK1402099T3 (en)
ES (1) ES2254689T3 (en)
WO (1) WO2002099176A1 (en)

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DE102009005387A1 (en) 2009-01-21 2010-07-22 Fleissner Gmbh Composite non-woven, useful as filtration medium, comprises nanofibers bonded to supporting non-woven by fiber entanglements created by water-jet needling
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DE19929709C2 (en) * 1999-06-24 2001-07-12 Lueder Gerking Process for the production of essentially endless fine threads and use of the device for carrying out the process
DE19934442C2 (en) * 1999-07-26 2001-09-20 Freudenberg Carl Fa Process for producing a nonwoven and nonwoven for producing cleanroom protective clothing

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DE50205125D1 (en) 2006-01-05
WO2002099176A1 (en) 2002-12-12
JP2004527673A (en) 2004-09-09
DK1402099T3 (en) 2006-03-27
CN1330813C (en) 2007-08-08
ATE311493T1 (en) 2005-12-15
ES2254689T3 (en) 2006-06-16
US20040222556A1 (en) 2004-11-11
DE10127471A1 (en) 2002-12-12
CN1513070A (en) 2004-07-14
US20070004304A1 (en) 2007-01-04
EP1402099A1 (en) 2004-03-31

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