EP1424419B1 - Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten - Google Patents

Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten Download PDF

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Publication number
EP1424419B1
EP1424419B1 EP02026433A EP02026433A EP1424419B1 EP 1424419 B1 EP1424419 B1 EP 1424419B1 EP 02026433 A EP02026433 A EP 02026433A EP 02026433 A EP02026433 A EP 02026433A EP 1424419 B1 EP1424419 B1 EP 1424419B1
Authority
EP
European Patent Office
Prior art keywords
filaments
production
meltblown filaments
geotextiles
melt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02026433A
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English (en)
French (fr)
Other versions
EP1424419A1 (de
Inventor
Uwe Bornmann
Albert Mittermayr
Klaus Ahm
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.)
Polyfelt GmbH
Original Assignee
Polyfelt GmbH
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 Polyfelt GmbH filed Critical Polyfelt GmbH
Priority to ES02026433T priority Critical patent/ES2254591T3/es
Priority to DK02026433T priority patent/DK1424419T3/da
Priority to AT02026433T priority patent/ATE318335T1/de
Priority to EP02026433A priority patent/EP1424419B1/de
Priority to DE50205867T priority patent/DE50205867D1/de
Priority to PT02026433T priority patent/PT1424419E/pt
Publication of EP1424419A1 publication Critical patent/EP1424419A1/de
Application granted granted Critical
Publication of EP1424419B1 publication Critical patent/EP1424419B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—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
    • 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
    • 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

Definitions

  • the invention relates to a method for producing a controllable yarn curtain for the production of geotextiles from melt-spun filaments.
  • melt-spun filament bundles are spread by a separator, wherein they impinge on a flat baffle.
  • the object of the invention was to subject the most uniform and defined spreading of the melt-spun filaments without them an electrostatic charge.
  • the invention therefore provides a process for the production of geotextiles from melt-spun filaments, characterized in that the filaments are spread open by a separator, wherein the filament bundle impinges on a convexly or concavely formed impact surface.
  • Curvature of this baffle is adjustable.
  • the degree of curvature can be controlled hydraulically or pneumatically but also mechanically. Such control devices are known.
  • the yarn is narrow but fanned very evenly and stored accordingly on a sieve or conveyor belt. If the baffle surface is concave, the suture veil is fanned out wide and relatively unevenly and accordingly deposited on a wire or conveyor belt.
  • the uniformity of the geotextile can be controlled by varying the baffles of individual separators, since with concave-shaped impact surface, the surface mass is lower than in the case of a convexly shaped impact surface.
  • the coupling with a thickness gauge controls the setting of the individual baffles depending on the local thickness measurement
  • thermoplastically processable plastics for example polyolefins, polyesters or polyamides, preferably polyolefins, in particular polypropylene and polyester.
  • the filaments are usually produced from the melt of the corresponding polymer, optionally with the addition of processing aids.
  • filaments or filaments extruded from a spinnerette can be cooled and drawn. Subsequently, they are deposited by means of a guide plate on a conveyor belt.
  • the subsequent solidification can be carried out in a conventional manner, for example by thermal consolidation, a needle method or hydroentanglement, as well as by chemical bonding.
  • the deposited filaments can be transported without disturbing the structure at least as far as the first solidification zone.
  • the melt-spun filaments are thus deposited on the endless screen belt and transported on this screen belt to the first solidification stage.
  • the deposited filaments are fixed during transport on the screen belt by suction zones, so that no interference during transport of the unconsolidated filaments can occur.
  • the water jets act through the sieve belt and / or the sieve belt serves as a support.
  • the geotextile After solidification in the first solidification stage, the geotextile is sufficiently solidified, so that it can be performed without disturbing the structure without the support of a conveyor belt.
  • the screen belt can also be guided by any further solidification stages.
  • Suitable filaments are all melt-spinnable raw materials, for example polyolefins, such as polypropylene, polyamides or polyesters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)
  • Wire Processing (AREA)
  • Air Bags (AREA)

Description

  • Die Erfindung betrifft einen Verfahren zur Erzeugung eines regelbaren Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten.
  • Die Aufspreizung von schmelzgesponnenen Filamentbündeln erfolgt nach dem Stand der Technik dadurch, das diese von einem Separator aufgespreizt werden, wobei sie auf eine ebene Prallfläche aufprallen.
  • Aus der DE 196 50 608 ist ein Verfahren zur Erzeugung eines Fadenschleiers durch elektrostatische Aufladung bekannt, wobei die von einem gleichmäßigen Luftstrom begleiteten Filamente unmittelbar vor der elektrostatischen Aufladung auf die Oberseite eine tragflügelförmigen Prallkörpers unter einem spitzen wnkel auftreffen. Dabei soll eine möglichst gleichmäßige Aufspreizung der Filament vor der Ablage erreicht werden.
  • Aufgabe der Erfindung war es eine möglichst gleichmäßige und definierte Aufspreizung der schmelzgesponnen Filamente ohne diese einer elektrostatischen Aufladung zu unterwerfen.
  • Gegenstand der Erfindung ist daher ein Verfahren zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten, dadurch gekennzeichnet, dass die Filamente durch einen Separator aufgespreizt werden, wobei das Filamentbündel auf einer konvex oder konkav ausgebildeten Prallfläche auftrifft.
  • Wölbung dieser Prallfläche ist regelbar. Der Grad der Wölbung kann hydraulisch oder pneumatisch aber auch mechanisch geregelt werden. Derartige Regelungseinrichtungen sind bekannt.
  • Ist die Prallfläche konvex ausgebildet wird der Fadeschleier schmal aber sehr gleichmäßig aufgefächert und dementsprechend auf einem Sieb- oder Transportband abgelegt.
    Ist die Prallfläche konkav geformt, wird der Fadenschleier breit und relativ ungleichmäßig aufgefächert und dementsprechend auf einem Sieb- oder Transportband abgelegt.
  • Damit kann durch Variation der Prallflächen einzelner Separatoren die Gleichmäßigkeit des Geotextils gesteuert werden, da bei konkav geformter Prallfläche die Flächenmasse geringer ist, als bei konvex geformter Prallfläche.
  • Die Kopplung mit einem Dickenmessgerät, steuert in Abhängigkeit der örtlichen Dickenmessung die Einstellung der einzelnen Prallflächen
  • Zur Herstellung der Filamente können alle thermoplastisch verarbeitbaren Kunststoffe verwendet, werden, beispielsweise Polyolefine, Polyester oder Polyamide, bevorzugt werden Polyolefine, insbesondere Polypropylen und Polyester verwendet.
  • Die Filamente werden üblicherweise aus der Schmelze des entsprechenden Polymers, gegebenenfalls unter Zusatz von Verarbeitungshilfsmittel erzeugt. Üblicherweise können die aus einer Spinndüse extrudierten Filamente oder Fäden gekühlt und verstreckt werden. Anschließend werden sie mittels eines Leitblechs auf ein Transportband abgelegt.
  • Die anschließende Verfestigung kann auf konventionelle Weise, beispielsweise durch thermische Verfestigung, ein Nadelverfahren oder durch Wasserstrahlverfestigung, sowie durch chemische Bindung erfolgen.
  • Besonders vorteilhaft wird ein wasserstrahlverfestigungsverfahren verwendet, bei dem die abgelegten Filamente ohne Störung der Struktur zumindest bis in die erste Verfestigungszone transportiert werden können.
    Die schmelzgesponnenen Filamente werden also auf dem endlosen Siebband abgelegt und auf diesem Siebband zur ersten Verfestigungsstufe transportiert. Die abgelegten Filamente werden dabei während des Transports auf dem Siebband durch Saugzonen fixiert, sodass keine Störungen beim Transport der unverfestigten Filamente auftreten können.
  • In der ersten Verfestigungsstufe wirken die Wasserstrahlen je nach Anordnung der Verfestigungseinrichtung durch das Siebband und/oder das Siebband dient als Unterlage.
  • Nach der Verfestigung in der ersten Verfestigungsstufe ist das Geotextil ausreichend verfestigt, sodass es ohne Störungen der Struktur auch ohne Unterstützung eines Transportbandes geführt werden kann.
    Gegebenenfalls kann das Siebband aber auch durch etwaige weitere Verfestigungsstufen geführt werden.
  • Auf dem Siebband findet also sowohl die Vliesbildung als auch die Verfestigung statt.
  • Durch dieses Verfahren ist es mögliche jede Störung in der Struktur des noch unverfestigten Geotextils nach der Ablage zu vermeiden.
    Es können daher aufwendige Verfahrensführungen wie beispielsweise eine wechselseitige Führung vermieden werden.
  • Als Filamente kommen alle schmelzspinnbaren Rohstoffe in Frage, beispielsweise Polyolefine, wie Polypropylen, Polyamide oder Polyester.

Claims (2)

  1. Verfahren zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten, wobei die Filamente durch einen Separator aufgespreizt werden, das Filamentbündel anschließend auf einer konvex oder konkav ausgebildeten Prallfläche auftrifft, dadurch definiert auf einem Sieb- oder Transportband abgelegt werden und anschließend verfestigt werden, dadurch gekennzeichnet, dass die Wölbung der Prallfläche durch Koppelung mit einem Dickenmessgerät gesteuert wird
  2. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Verfestigung durch eine Wasserstrahlvertestigung erfolgt
EP02026433A 2002-11-27 2002-11-27 Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten Expired - Lifetime EP1424419B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES02026433T ES2254591T3 (es) 2002-11-27 2002-11-27 Velo de hilo regulable para fabricar materiales geotextiles con filamentos hilados por fusion.
DK02026433T DK1424419T3 (da) 2002-11-27 2002-11-27 Justerbar trådslör til fremstilling af geotekstikler af smeltespundne filamenter
AT02026433T ATE318335T1 (de) 2002-11-27 2002-11-27 Regelbarer fadenschleier zur herstellung von geotextilien aus schmelzgesponnenen filamenten
EP02026433A EP1424419B1 (de) 2002-11-27 2002-11-27 Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten
DE50205867T DE50205867D1 (de) 2002-11-27 2002-11-27 Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten
PT02026433T PT1424419E (pt) 2002-11-27 2002-11-27 Balao de fio regulavel para o fabrico de geotexteis de filamentos extrudados por fusao

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02026433A EP1424419B1 (de) 2002-11-27 2002-11-27 Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten

Publications (2)

Publication Number Publication Date
EP1424419A1 EP1424419A1 (de) 2004-06-02
EP1424419B1 true EP1424419B1 (de) 2006-02-22

Family

ID=32241279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02026433A Expired - Lifetime EP1424419B1 (de) 2002-11-27 2002-11-27 Regelbarer Fadenschleier zur Herstellung von Geotextilien aus schmelzgesponnenen Filamenten

Country Status (6)

Country Link
EP (1) EP1424419B1 (de)
AT (1) ATE318335T1 (de)
DE (1) DE50205867D1 (de)
DK (1) DK1424419T3 (de)
ES (1) ES2254591T3 (de)
PT (1) PT1424419E (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511625A (en) * 1966-08-02 1970-05-12 Owens Corning Fiberglass Corp Apparatus and method for making a body of multifilament strands
DE1757611A1 (de) * 1968-05-24 1971-12-23 Lutravil Spinnvlies Verfahren zur Herstellung von Spinnvliesen und daraus hergestelle Filterstaebe
FR2117812A1 (en) * 1970-12-11 1972-07-28 Rhodiaceta Filament deflector - for prodn of continuous filament non-woven webs
US4345927A (en) * 1980-12-31 1982-08-24 Ppg Industries, Inc. Apparatus and process for use preparing a continuous strand mat
FR2663960A1 (fr) * 1990-07-02 1992-01-03 Chomarat & Cie Structure textile permettant de realiser des articles stratifies plats ou en forme.
EP0544425A1 (de) * 1991-11-26 1993-06-02 Hollingsworth (U.K.) Limited Drehkanne
JP3149659B2 (ja) * 1993-12-27 2001-03-26 東レ株式会社 不織布の製造方法

Also Published As

Publication number Publication date
ES2254591T3 (es) 2006-06-16
EP1424419A1 (de) 2004-06-02
DE50205867D1 (de) 2006-04-27
DK1424419T3 (da) 2006-06-06
ATE318335T1 (de) 2006-03-15
PT1424419E (pt) 2006-05-31

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