WO2000020670A1 - Method and device for pre-treating a textile yarn - Google Patents

Method and device for pre-treating a textile yarn Download PDF

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Publication number
WO2000020670A1
WO2000020670A1 PCT/EP1999/007481 EP9907481W WO0020670A1 WO 2000020670 A1 WO2000020670 A1 WO 2000020670A1 EP 9907481 W EP9907481 W EP 9907481W WO 0020670 A1 WO0020670 A1 WO 0020670A1
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Prior art keywords
yarn
plasma
longitudinal direction
yarns
fibers
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PCT/EP1999/007481
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German (de)
French (fr)
Inventor
Bernhard Funger
Original Assignee
Eduard Küsters Maschinenfabrik GmbH & Co. KG
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Application filed by Eduard Küsters Maschinenfabrik GmbH & Co. KG filed Critical Eduard Küsters Maschinenfabrik GmbH & Co. KG
Publication of WO2000020670A1 publication Critical patent/WO2000020670A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J3/00—Modifying the surface
    • D02J3/12—Modifying the surface by removing projecting ends of fibres
    • D02J3/16—Modifying the surface by removing projecting ends of fibres by singeing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • D06M10/025—Corona discharge or low temperature plasma

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 5.
  • a singeing device that works electrically without an open gas flame is also evident from DE 475 238, which shows a singeing device in which the strong physical influence is formed by electrical sparks.
  • the yarn is passed between a type of wire brush and an opposite pole in the form of a metal plate, a metallic roller or a second "wire brush".
  • the sparks jump at the appropriate voltage between the tips of the individual wires and the opposite pole.
  • a very large number of high-voltage sparks should be discharged in the immediate vicinity of the scorch material in the shortest possible time, so that the existing fibers are completely burnt off.
  • the object of the invention is to improve the method and the devices for exerting a strong physical influence on textile yarns. This object is achieved by the invention reproduced in claim 1 in its procedural aspect and by the invention reproduced in claim 5 in its device aspect.
  • the plasma according to the invention burns continuously, in contrast to the spark, and the yarn is passed through the plasma area.
  • the fine hairs on the surface are preferred due to the effects of temperature captured and evaporated or melted.
  • the plasma and the speed of transport of the yarn must be coordinated so that the desired effect is achieved, but the core of the yarn is not significantly affected by the plasma treatment.
  • the plasma is a so-called
  • Atmospheric plasma which does not burn in an evacuated room, but is generated in a burner at atmospheric pressure and emerges from the burner against a workpiece.
  • a plasma torch is described in EP 761 415 A2.
  • the yarn can be guided along a plurality of devices for generating the plasma along its transport path.
  • the yarn is a staple fiber yarn.
  • spun yarns spun yarns
  • PA6, Perlon; PA6.6 nylon polyamide fibers
  • the staple fiber carpet yarns are spun from staple fibers, ie from fibers of limited length. Spun yarns have the advantage, among other things, that they can be dyed well and evenly and that the carpets made and dyed therefrom have a uniform, calm appearance.
  • carpet yarns whether they consist of natural fibers or synthetic fibers, have a strong hairiness, ie the ends of the individual fibers forming the yarn are not bound into the yarn, but protrude from the yarn that they can be separated from the yarn or pulled out of the yarn in the event of a mechanical attack: such spun yarns have a strong tendency to fluff. This leads to heavy lint deposits in these carpet yarns, whether they consist of natural fibers or synthetic fibers, have a strong hairiness, ie the ends of the individual fibers forming the yarn are not bound into the yarn, but protrude from the yarn that they can be separated from the yarn or pulled out of the yarn in the event of a mechanical attack: such spun yarns have a strong tendency to fluff. This leads to heavy lint deposits in these
  • Yarn processing machines and systems that have to be cleaned accordingly which is associated with increased mechanical expenditure (filter systems, brushes, suction) if it is to be carried out continuously, or requires costly system downtimes.
  • the shift to the filament yarns has occurred, although the filament yarns have disadvantages compared to the spun yarns. Because of their structure, they do not have the lint problem described, but they are more difficult to dye and do not have such good mechanical properties. You have e.g. poorer "resilience" when the load is interrupted. Carpets made and dyed from filament yarn have a non-level, restless, often streaky appearance. Mechanical loads such as Footprints or pressure marks on objects or furniture feet that have been placed are still visible for a long time after the pressure has ceased. These circumstances were the reason that for decades there have been various efforts to promote the spun yarns, which aim to reduce hairiness and thus the amount of fluff. For example, Fiber blends were produced in which other fibers with a lower melting point were blended into the base fibers, in order to then bind the protruding fine individual hairs to the yarn by means of a thermal treatment.
  • Figures 1 and 2 show side views; Fig. 3 shows a view in the direction of the yarn.
  • the yarn 1 is transported in the direction of the arrow in its longitudinal direction by known means, for example by passing it with a certain longitudinal tension over appropriately arranged rollers.
  • the yarn 1 runs past a fixed plasma torch 10.
  • the plasma torch 10 has an approximately cylindrical housing 2, the axis 3 of which is perpendicular to the longitudinal direction of the yarn and intersects the yarn axis.
  • a plasma 5 emerges from a nozzle-like mouth 4 of the plasma torch 2 and occupies a certain spatial area 6 in front of the mouth 4.
  • the yarn 1 is transported through this space 6 in its longitudinal direction and is exposed to the superficial action of the plasma during the short period in which it passes through the space 6, as a result of which fine hairs protruding from the yarn 1 are removed and the surface of the yarn 1 activated for subsequent equipment treatments.
  • the plasma treatment takes place in the longitudinal section of the yarn 1 which is determined by the expansion of the spatial area in the longitudinal direction of the yarn 1 and which is continuously displaced along the yarn 1 in accordance with the yarn transport.
  • the device according to FIG. 2 differs from that according to FIG. 1 only in that three plasma torches 10, the axes 3 of which lie in a common plane, are connected in series.
  • the yarn 1 thus experiences the action of the plasma 5 three times in succession, the surface being able to cool slightly on the way from one plasma 5 to the next.
  • three plasma torches 10 are arranged offset from one another by 120 ° in the circumferential direction of the yarn.
  • the mouths 4 do not touch each other, but leave a certain distance from each other, which is determined by the expansion of the plasma region 6.
  • the yarn 1 is transported through the center of the plasma region 6 perpendicular to the plane of the drawing.
  • the three plasma torches 10 can lie in a common plane perpendicular to the yarn 1, but can also be staggered one behind the other except in the circumferential direction in the longitudinal direction of the yarn 1.
  • FIGS. 2 and 3 That three plasma torches 10 are shown in FIGS. 2 and 3 are only features of the exemplary embodiments.
  • the control of the plasma torch 10 depends on the transport speed of the yarn 1 and its physical and chemical properties. It must be tuned in such a way that a sufficient effect is achieved without the yarn inside being impaired.

Abstract

In the method and the device disclosed in the invention, a textile yarn (1) transported along its longitudinal direction is submitted to the effect of an atmospheric plasma generated by a plasma torch (10) in order to remove surface hairiness, modify the surface and/or activate the surface for subsequent finishing operations.

Description

Verfahren und Vorrichtung zur Vorbehandlung eines textilen Garns Method and device for pretreating a textile yarn
Die Erfindung bezieht sich auf ein Verfahren nach dem Oberbegriff des Anspruchs 1 und eine Vorrichtung nach dem Oberbegriff des Anspruchs 5.The invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 5.
Viele Garne weisen von der Herstellung her an der Oberfläche hervorstehende feine Härchen auf, die in manchen Fällen bei der Weiterverarbeitung der Garne Probleme bereiten. So können z.B. Nähgarne das Nadelöhr verstopfen, wenn sich die feinen Garnen in dessen Bereich festsetzen. Besonders unangenehm sind sich ablösende feine Härchen, die im Verlaufe der Ausrüstung damit hergestellter texti- ler Flächengebilde Flusen erzeugen, die die Flüssigkeits- führung bei der Ausrüstungsbehandlung belasten und verstopfen .Many yarns have fine hairs that protrude from the surface, which in some cases cause problems in the further processing of the yarns. For example, Sewing threads clog the eye of the needle when the fine threads get stuck in the area. Detachable fine hairs are particularly uncomfortable, which produce lint in the course of the finishing of textile fabrics produced therewith, which stress and clog the liquid flow during the finishing treatment.
Um dem vorzubeugen werden Garne seit langer Zeit in vielen Fällen gesengt, was als das älteste Verfahren zurTo prevent this, yarns have long been scorched in many cases, which is considered the oldest process
Ausübung "einer starken physikalischen Einwirkung" auf das Garn anzusehen ist. Beiden Garnsengvorrichtungen wird ein laufendes Garn durch die Flamme eines feststehenden Gasbrenners hindurchgeleitet wird. Die "starke physikalische Einwirkung" besteht hierbei in der Temperatureinwirkung bei dem Kontakt mit den heißen Gasen der Flammen. Es gibt durchaus verschiedenartige Konstruktionen von Brennern für diesen Zweck, wie die DE-PSen 160 312 oder 438 826 zeigen.Exercise "a strong physical influence" on the yarn can be seen. In both yarn singeing devices, a running yarn is passed through the flame of a fixed gas burner. The "strong physical influence" consists in the temperature effect when it comes into contact with the hot gases of the flame. There are quite different designs of burners for this purpose, as shown in DE-PSen 160 312 or 438 826.
Schon frühzeitig wurde versucht, das Garnsengen nicht mit einer offenen Flamme, sondern durch Vorbeileiten des Garns an elektrisch beheizten Strahlungskörpern zu bewerkstelligen, die es bei der Sengvorrichtung nach der DE 377 578 der Fall ist.At an early stage, attempts were made not to use an open flame to do the yarn cutting, but by passing the yarn past electrically heated radiation bodies, which is the case with the singeing device according to DE 377 578.
Eine ohne offene Gasflamme elektrisch arbeitende Sengvorrichtung geht auch aus der DE 475 238 hervor, die eine Sengvorrichtung erkennenläßt, bei der die starke physikalische Einwirkung durch elektrische Funken gebildet wird. Das Garn wird zwischen einer Art Drahtbürste und einem Gegenpol in Gestalt einer Metallplatte, einer metallischen Walze oder einer zweiten "Drahtbürste" hindurch- geführt. Die Funken springen bei entsprechender Spannung zwischen den Spitzen der einzelnen Drähte und dem Gegenpol über. Es soll in möglichst kurzer Zeit eine sehr große Anzahl Hochspannungsfunken in unmittelbarer Nähe des Senggutes entladen werden, so daß ein vollkommenes Abbrennen der vorhandenen Fasern stattfindet.A singeing device that works electrically without an open gas flame is also evident from DE 475 238, which shows a singeing device in which the strong physical influence is formed by electrical sparks. The yarn is passed between a type of wire brush and an opposite pole in the form of a metal plate, a metallic roller or a second "wire brush". The sparks jump at the appropriate voltage between the tips of the individual wires and the opposite pole. A very large number of high-voltage sparks should be discharged in the immediate vicinity of the scorch material in the shortest possible time, so that the existing fibers are completely burnt off.
Der Erfindung liegt die Aufgabe zugrunde, das Verfahren und die Vorrichtungen zur Ausübung einer starken physikalischen Einwirkung auf textile Garne zu verbessern. Diese Aufgabe wird durch die in Anspruch 1 wiederge- gebene Erfindung in ihrem verfahrensmäßigen Aspekt und durch die in Anspruch 5 wiedergegebene Erfindung in ihrem vorrichtungsmäßigen Aspekt gelöst.The object of the invention is to improve the method and the devices for exerting a strong physical influence on textile yarns. This object is achieved by the invention reproduced in claim 1 in its procedural aspect and by the invention reproduced in claim 5 in its device aspect.
Das erfindungsgemäße Plasma brennt stetig, im Gegensatz zum Funken, und es wird das Garn durch den Plasmabe- reich hindurchgeleitet. Durch die Temperatureinwirkung werden die feinen Härchen an der Oberfläche bevorzugt erfaßt und verdampft oder abgeschmolzen. Das Plasma und die Transportgeschwindigkeit des Garns sind aufeinander abzustimmen, damit die erwünschte Wirkung erreicht wird, aber der Kern des Garns nicht von der Plasmabehandlung wesentlich beeinträchtigt wird.The plasma according to the invention burns continuously, in contrast to the spark, and the yarn is passed through the plasma area. The fine hairs on the surface are preferred due to the effects of temperature captured and evaporated or melted. The plasma and the speed of transport of the yarn must be coordinated so that the desired effect is achieved, but the core of the yarn is not significantly affected by the plasma treatment.
Die Reduzierung der Haarigkeit des Garns ist jedoch nur ein Aspekt der Plasmabehandlung. Ein wesentlicher weiterer Effekt sind die Modifizierung der Oberfläche und Verbesserung der färberischen und mechanischen Eigenschaf- ten des einer Plasmaatmosphäre ausgesetzten Garns. Wie dieHowever, reducing the hairiness of the yarn is only one aspect of the plasma treatment. Another important effect is the modification of the surface and improvement of the coloring and mechanical properties of the yarn exposed to a plasma atmosphere. As the
Versuche gezeigt haben, wird das Garn fester und nimmt die Farbe leichter an, was auf eine gewisse Oberflächenaktivierung durch die Plasmabehandlung hinweist.Experiments have shown that the yarn becomes firmer and takes on the color more easily, which indicates a certain surface activation by the plasma treatment.
Bei der bevorzugten Aus führungs form der Erfindung nach den Ansprüchen 2 und 6 ist das Plasma ein sogenanntesIn the preferred embodiment of the invention according to claims 2 and 6, the plasma is a so-called
Atmosphärenplasma, welches nicht in einem evakuierten Raum brennt, sondern in einem Brenner bei Atmosphärendruck erzeugt wird und aus dem Brenner gegen ein Werkstück hervortritt . Ein solcher Plasmabrenner ist in der EP 761 415 A2 beschrieben.Atmospheric plasma, which does not burn in an evacuated room, but is generated in a burner at atmospheric pressure and emerges from the burner against a workpiece. Such a plasma torch is described in EP 761 415 A2.
Der große Vorteil eines solchen Plasmabrenners ist das Arbeiten an der Atmosphäre, was eine erhebliche Erleichterung darstellt und den technischen Aufwand für die Plasmabehandlung bedeutend reduziert.The great advantage of such a plasma torch is working in the atmosphere, which is a considerable relief and significantly reduces the technical outlay for the plasma treatment.
Es kann gemäß den Ansprüchen 3 und 7 das Garn längs seines Transportweges an mehreren Einrichtungen zur Erzeugung des Plasmas entlanggeführt werden.According to claims 3 and 7, the yarn can be guided along a plurality of devices for generating the plasma along its transport path.
Dies stellt eine ausreichende Einwirkung des Plasmas an der Oberfläche sicher, ohne daß die einzelne Einwirkung zu stark sein muß und das Innere des Garns beeinflußt. Das Garn hat zwischen den einzelnen Plasmabehandlungen Gelegenheit, oberflächlich etwas abzukühlen.This ensures sufficient exposure of the plasma to the surface, without the individual exposure having to be too strong and affecting the inside of the yarn. Between the individual plasma treatments, the yarn has the opportunity to cool down a bit on the surface.
Bei einem wichtigen Ausführungsbeispiel der Erfindung ist das Garn ein Spinnfaserteppichgarn. Zur Herstellung getufteter, gewebter, oder gewirkter Teppiche werden außer natürlichen Fasern in größeren Mengen Spinnfasergarne (Spungarne) aus Polyamidfasern (PA6, Perlon; PA6.6 Nylon) aus Polypropylen, aus Polyester oder anderen Chemiefasern sowie aus Mischungen derartiger Fasern eingesetzt. Die Spinnfaser-Teppichgarne werden aus Stapelfasern, d.h. aus Fasern begrenzter Länge gesponnen. Spinnfasergarne haben unter anderem den Vorteil, daß sie sich gut und gleichmäßig anfärben lassen und die dar- aus hergestellten und gefärbten Teppiche ein gleichmäßiges ruhiges Warenbild aufweisen. Von großem Nachteil ist jedoch, daß diese Teppichgarne, ob sie nun aus natürlichen Fasern oder aus synthetischen Fasern bestehen, eine starke Haarigkeit aufweisen, d.h. daß die Enden der das Garn bildenden Einzelfasern nicht in das Garn eingebunden sind, sondern von dem Garn abstehen, so daß sie bei einem mechanischen Angriff von dem Garn abgetrennt oder aus dem Garn herausgezogen werden können: derartige Spinnfasergarne neigen stark zum Flusen. Dies führt zu starken Flusenablagerungen in den dieseIn an important embodiment of the invention, the yarn is a staple fiber yarn. For the production of tufted, woven or knitted carpets, in addition to natural fibers, large amounts of spun yarns (spun yarns) made of polyamide fibers (PA6, Perlon; PA6.6 nylon) made of polypropylene, polyester or other chemical fibers and mixtures of such fibers are used. The staple fiber carpet yarns are spun from staple fibers, ie from fibers of limited length. Spun yarns have the advantage, among other things, that they can be dyed well and evenly and that the carpets made and dyed therefrom have a uniform, calm appearance. A great disadvantage, however, is that these carpet yarns, whether they consist of natural fibers or synthetic fibers, have a strong hairiness, ie the ends of the individual fibers forming the yarn are not bound into the yarn, but protrude from the yarn that they can be separated from the yarn or pulled out of the yarn in the event of a mechanical attack: such spun yarns have a strong tendency to fluff. This leads to heavy lint deposits in these
Garne verarbeitenden Maschinen und Anlagen, die entsprechend gereinigt werden müssen, was mit einem erhöhten maschinentechnischen Aufwand (Filtersysteme, Bürsten, Saugen) einhergeht, wenn es kontinuierlich geschehen soll, oder aber kostenträchtige Anlagenstillstände bedingt.Yarn processing machines and systems that have to be cleaned accordingly, which is associated with increased mechanical expenditure (filter systems, brushes, suction) if it is to be carried out continuously, or requires costly system downtimes.
Ein derartiger Flusenanfall und Faserabtrag tritt nicht nur bei der Herstellung und Ausrüstung derartiger Teppiche auf, sondern auch noch während deren Nutzung, besonders in der Anfangsphase. Diese Probleme bei den Spinnfaser-Teppichgarnen haben in den letzten Jahren dazu geführt, daß sich der weltweite Marktanteil der Spinnfaser-Teppichgarne trotz ihrer wirtschaftlichen und färberischen Vorteile jährlich um einige Prozent verringert und in Richtung verstärkter Anwendung der Filamentgarne verschiebt, die die Alternative zu denSuch fluff and fiber removal occurs not only in the manufacture and finishing of such carpets, but also during their use, especially in the initial phase. In recent years, these problems with staple fiber carpet yarns have caused the global market share of staple fiber carpet yarns to decrease by a few percent annually despite their economic and dyeing benefits, and to shift towards the increased use of filament yarns, which are the alternative to
Spinnfaser-Teppichgarnen darstellen und nicht aus einzel- nen dünnen Stapelfasern gesponnen sind, sondern aus einzelnen, jeweils in sich kompakten aus feinen Düsen extru- dierten endlosen Kunststoffasern bestehen, von denen mehrere zu dem zu verarbeitenden Garn zusammengedreht werden. Gegebenenfalls werden mehrere solcher Garnstränge zu einem dickeren Teppichgarn verzwirnt.Represent spun fiber carpet yarns and not from individual thin staple fibers are spun, but consist of individual endless plastic fibers, each compactly extruded from fine nozzles, several of which are twisted together to form the yarn to be processed. If necessary, several such skeins of thread are twisted into a thicker carpet yarn.
Die Verschiebung zu den Filamentgarnen hin ist erfolgt, obwohl die Filamentgarne Nachteile gegenüber den Spinnfasergarnen haben. Sie weisen aufgrund ihres Aufbaus zwar nicht das beschriebene Flusenproblem auf, lassen sich aber schlechter anfärben und haben auch nicht so gute mechanische Eigenschaften. Sie besitzen z.B. ein schlechteres "Rücksprungvermögen" bei zeitlich unterbrochener Belastung. Aus den Filamentgarnen hergestellte und gefärb- te Teppiche haben ein nicht egales, unruhiges, oftmals streifiges Warenbild. Mechanische Belastungen wie z.B. Trittspuren oder Druckstellen von hingestellten Gegenständen oder Möbelfüßen sind nach Aufhören der Druckeinwirkung lange Zeit weiter sichtbar. Diese Umstände waren der Anlaß, daß es seit Jahrzehnten unterschiedlichste Bemühungen zur Förderung der Spinnfasergarne gibt, die darauf abzielen, die Haarigkeit und damit den Flusenanfall zu verringern. So wurden z.B. Fasermischungen hergestellt, bei denen in die Grundfasern andere Fasern mit niedrigerem Schmelzpunkt eingeblendet wurden, um anschließend mittels einer thermischen Behandlung die abstehenden feinen Einzelhärchen an das Garn zu binden .The shift to the filament yarns has occurred, although the filament yarns have disadvantages compared to the spun yarns. Because of their structure, they do not have the lint problem described, but they are more difficult to dye and do not have such good mechanical properties. You have e.g. poorer "resilience" when the load is interrupted. Carpets made and dyed from filament yarn have a non-level, restless, often streaky appearance. Mechanical loads such as Footprints or pressure marks on objects or furniture feet that have been placed are still visible for a long time after the pressure has ceased. These circumstances were the reason that for decades there have been various efforts to promote the spun yarns, which aim to reduce hairiness and thus the amount of fluff. For example, Fiber blends were produced in which other fibers with a lower melting point were blended into the base fibers, in order to then bind the protruding fine individual hairs to the yarn by means of a thermal treatment.
Auch wurde bereits versucht, durch verschiedene che- mische Applikationen die zur Flusenbildung führenden, nicht fest im Garn eingebundenen Einzelhärchen an das Garn gewissermaßen anzukleben.Attempts have also already been made to use a variety of chemical applications to to a certain extent to adhere the individual hairs leading to the formation of lint, which are not firmly embedded in the yarn.
Alle bisher probierten Verfahren führten nicht zum gewünschten Erfolg, nämlich der Herstellung eines wirt- schaftlich herstellbaren, brauchbaren Saubergarns aus gesponnenen Stapelfasern. Es wurde gefunden, daß durch eine erfindungsgemäße Vorbehandlung mit einem Plasma insbesondere Spinnfaserteppichgarne in ihren Ausrüstungs- und Gebrauchseigenschaften merklich verbessert werden können. Außer mehrere Einrichtungen zur Erzeugung des Plasmas in Längsrichtung des Garns hintereinander anzuordnen, ist es gemäß Anspruch 8 auch möglich, daß mehrere solcher Einrichtungen über den Umfang des Garns verteilt angeordnet sind, so daß die Behandlung über den Umfang des Garns gleichmäßiger erfolgt.All of the processes that have been tried so far have not led to the desired success, namely the production of economically producible, usable pickled yarn from spun staple fibers. It has been found that pretreatment according to the invention with a plasma, in particular spun fiber carpet yarns, can be markedly improved in their finishing and use properties. In addition to arranging several devices for generating the plasma one behind the other in the longitudinal direction of the yarn, it is also possible according to claim 8 that several such devices are arranged distributed over the circumference of the yarn, so that the treatment takes place more uniformly over the circumference of the yarn.
In der Zeichnung sind typische Vorrichtungen zur Durchführung des erfindungsgemäßen Verfahrens schematisch angedeutet .Typical devices for carrying out the method according to the invention are indicated schematically in the drawing.
Fig. 1 und 2 zeigen Seitenansichten; Fig. 3 zeigt eine Ansicht in Richtung des Garns.Figures 1 and 2 show side views; Fig. 3 shows a view in the direction of the yarn.
In Fig. 1 wird das Garn 1 in Pfeilrichtung in seiner Längsrichtung durch bekannte Mittel transportiert, z.B. indem es mit einer gewissen Längsspannung über entsprechend angeordnete Rollen geführt wird. An einer Stelle läuft das Garn 1 an einem feststehend angeordneten Plasmabrenner 10 vorbei. In dem Ausführungsbeispiel hat der Plasmabrenner 10 ein etwa zylindrisches Gehäuse 2, dessen Achse 3 zur Längsrichtung des Garns senkrecht steht und die Garnachse schneidet. Aus einer düsenartigen Mündung 4 des Plasmabrenners 2 tritt ein Plasma 5 aus, welches einen bestimmten Raumbereich 6 vor der Mündung 4 einnimmt. Durch diesen Raumbereich 6 wird das Garn 1 in seiner Längsrichtung hindurch transportiert und ist während des kurzen Zeitabschnitts, in welchem es den Raumbereich 6 passiert, der oberflächlichen Einwirkung des Plasmas ausgesetzt, wodurch aus dem Garn 1 hervorstehende feine Härchen entfernt und die Oberfläche des Garns 1 für nachfolgende Ausrüstungsbehandlungen aktiviert werden. Die Plasmabehandlung findet in dem durch die Ausdehnung des Raumbe- reichs in Längsrichtung des Garns 1 bestimmten Längenabschnitt des Garns 1 statt, der sich entsprechend dem Garntransport ständig längs das Garns 1 verlagert. Die Vorrichtung nach Fig. 2 unterscheidet sich nur dadurch von derjenigen nach Fig. 1, daß drei Plasmabrenner 10, deren Achsen 3 in einer gemeinsamen Ebene liegen, hintereinander geschaltet sind. Das Garn 1 erfährt also dreimal hintereinander die Einwirkung des Plasmas 5, wobei sich die Oberfläche auf dem Wege von einem Plasma 5 zum nächsten leicht abkühlen kann.In Fig. 1, the yarn 1 is transported in the direction of the arrow in its longitudinal direction by known means, for example by passing it with a certain longitudinal tension over appropriately arranged rollers. At one point, the yarn 1 runs past a fixed plasma torch 10. In the exemplary embodiment, the plasma torch 10 has an approximately cylindrical housing 2, the axis 3 of which is perpendicular to the longitudinal direction of the yarn and intersects the yarn axis. A plasma 5 emerges from a nozzle-like mouth 4 of the plasma torch 2 and occupies a certain spatial area 6 in front of the mouth 4. The yarn 1 is transported through this space 6 in its longitudinal direction and is exposed to the superficial action of the plasma during the short period in which it passes through the space 6, as a result of which fine hairs protruding from the yarn 1 are removed and the surface of the yarn 1 activated for subsequent equipment treatments. The plasma treatment takes place in the longitudinal section of the yarn 1 which is determined by the expansion of the spatial area in the longitudinal direction of the yarn 1 and which is continuously displaced along the yarn 1 in accordance with the yarn transport. The device according to FIG. 2 differs from that according to FIG. 1 only in that three plasma torches 10, the axes 3 of which lie in a common plane, are connected in series. The yarn 1 thus experiences the action of the plasma 5 three times in succession, the surface being able to cool slightly on the way from one plasma 5 to the next.
Bei der Ausführungsform nach Fig. 3 sind drei Plasmabrenner 10 in Umfangsrichtung des Garns um 120° gegenein- ander versetzt angeordnet. Die Mündungen 4 berühren einander nicht, sondern belassen einen gewissen Abstand voneinander, der durch die Ausdehnung des Plasmabereichs 6 bestimmt ist. Das Garn 1 wird gemäß Fig. 3 senkrecht zur Zeichenebene durch das Zentrum des Plasmabereichs 6 hin- durchtransportiert. Die drei Plasmabrenner 10 können in einer gemeinsamen, zu dem Garn 1 senkrechten Ebene liegen aber auch außer in Umfangsrichtung in Längsrichtung des Garns 1 hintereinander gestaffelt sein.In the embodiment according to FIG. 3, three plasma torches 10 are arranged offset from one another by 120 ° in the circumferential direction of the yarn. The mouths 4 do not touch each other, but leave a certain distance from each other, which is determined by the expansion of the plasma region 6. According to FIG. 3, the yarn 1 is transported through the center of the plasma region 6 perpendicular to the plane of the drawing. The three plasma torches 10 can lie in a common plane perpendicular to the yarn 1, but can also be staggered one behind the other except in the circumferential direction in the longitudinal direction of the yarn 1.
Daß in den Fig. 2 und 3 jeweils drei Plasmabrenner 10 gezeigt sind, sind nur Merkmale der Ausführungsbeispiele.That three plasma torches 10 are shown in FIGS. 2 and 3 are only features of the exemplary embodiments.
Die Steuerung der Plasmabrenner 10 richtet sich nach der Transportgeschwindigkeit des Garns 1 und dessen physikalischen und chemischen Eigenschaften. Es muß eine Abstimmung derart erfolgen, daß eine ausreichende Wirkung erzielt wird, ohne daß das Garn im Innern beeinträchtigt wird . The control of the plasma torch 10 depends on the transport speed of the yarn 1 and its physical and chemical properties. It must be tuned in such a way that a sufficient effect is achieved without the yarn inside being impaired.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur Vorbehandlung eines textilen Garns, bei welchem das in seiner Längsrichtung transportierte Garn auf einem Längenabschnitt radial von außen kurzzeitig berührungslos einer starken physikalischen Einwirkung ausgesetzt wird, dadurch gekennzeichnet, daß das Garn der Einwirkung eines stetigen elektrischen Plasmas ausgesetzt wird.1. A process for the pretreatment of a textile yarn, in which the yarn transported in its longitudinal direction is exposed to a strong physical influence for a short time without contact on the length radially from the outside, characterized in that the yarn is exposed to the action of a constant electrical plasma.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Plasma ein Atmosphärenplasma ist.2. The method according to claim 1, characterized in that the plasma is an atmospheric plasma.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Garn auf seinem Transportwege der Einwirkung des Plasmas wiederholt ausgesetzt wird.3. The method according to claim 1 or 2, characterized in that the yarn is repeatedly exposed to the action of the plasma on its transport routes.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Garn ein Spinnfaser-Teppichgarn ist. 4. The method according to any one of claims 1 to 3, characterized in that the yarn is a spun fiber carpet yarn.
5. Vorrichtung zur Vorbehandlung eines textilen Garns5. Device for pretreating a textile yarn
mit Mitteln zum Transport des Garns (1) in seinerwith means for transporting the yarn (1) in its
Längsrichtung und mit einer Einrichtung zur Ausübung einer starken physikalischen Einwirkung kurzzeitig berührungslos radial von außen auf einen Längenabschnitt des Garns (1), dadurch gekennzeichnet, daß mittels der Einrichtung (10) ein stetiges elek- trisches Plasma erzeugbar ist, durch dessen WirkbereichLongitudinal direction and with a device for exerting a strong physical influence briefly without contact radially from the outside on a length section of the yarn (1), characterized in that by means of the device (10) a continuous electrical plasma can be generated through its effective range
(6) das Garn (1) transportierbar ist.(6) the yarn (1) is transportable.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß mittels der Einrichtung (10) ein Atmosphärenplas- ma erzeugbar ist.6. The device according to claim 5, characterized in that an atmospheric plasma can be generated by means of the device (10).
7. Vorrichtung nach Anspruch 5 oder 6 , dadurch gekennzeichnet, daß mehrere Einrichtungen (10,10,...) zur Erzeugung des Plasmas längs des Transportweges des Garns (1) hintereinander angeordnet sind.7. Apparatus according to claim 5 or 6, characterized in that a plurality of devices (10, 10, ...) for generating the plasma are arranged one behind the other along the transport path of the yarn (1).
8. Vorrichtung nach einem der Ansprüche 5 bis 7 , dadurch gekennzeichnet, daß mehrere Einrichtungen (10,10,...) zur Erzeugung des Plasmas über den Umfang des Garns (1) verteilt angeordnet sind. 8. Device according to one of claims 5 to 7, characterized in that a plurality of devices (10, 10, ...) for generating the plasma are arranged distributed over the circumference of the yarn (1).
PCT/EP1999/007481 1998-10-07 1999-10-06 Method and device for pre-treating a textile yarn WO2000020670A1 (en)

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DE19846179.8 1998-10-07
DE1998146179 DE19846179B4 (en) 1998-10-07 1998-10-07 Method and device for pretreating a textile yarn

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EP2966207A1 (en) * 2014-07-09 2016-01-13 La Navetta S.r.l. Multi-purpose apparatus for processing yarns or threads and the like

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JPS62117872A (en) * 1985-11-16 1987-05-29 株式会社島津製作所 Apparatus for plasma treatment of yarn
JPH03279462A (en) * 1990-03-28 1991-12-10 Osaka Prefecture Winding and feeding apparatus for yarn processing
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Publication number Priority date Publication date Assignee Title
EP2966207A1 (en) * 2014-07-09 2016-01-13 La Navetta S.r.l. Multi-purpose apparatus for processing yarns or threads and the like

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