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EP0223301B1 - Method for producing a weft thread from poy polyester - Google Patents

Method for producing a weft thread from poy polyester Download PDF

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Publication number
EP0223301B1
EP0223301B1 EP86201972A EP86201972A EP0223301B1 EP 0223301 B1 EP0223301 B1 EP 0223301B1 EP 86201972 A EP86201972 A EP 86201972A EP 86201972 A EP86201972 A EP 86201972A EP 0223301 B1 EP0223301 B1 EP 0223301B1
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EP
European Patent Office
Prior art keywords
fiber
dtex
thread
further characterized
weft
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
EP86201972A
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German (de)
French (fr)
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EP0223301A1 (en
Inventor
Paul Schaffner
Bruno Lang
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Viscosuisse SA
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Viscosuisse SA
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Priority to AT86201972T priority Critical patent/ATE50005T1/en
Publication of EP0223301A1 publication Critical patent/EP0223301A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre cords
    • 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
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S57/00—Textiles: spinning, twisting, and twining
    • Y10S57/902—Reinforcing or tyre cords

Definitions

  • the invention relates to a method for producing a heat-treated, rough thread made of polyester POY, preferably as a weft thread for a tire cord fabric, and a polyester thread produced by the method.
  • a polyester POY produced on the basis of an at least 90% polyethylene terephthalate, serves as the starting material for the process according to the invention; with a titer of 50-300 dtex and 20-50 fibrils.
  • Vehicle tires of known design consist in the essential parts of a reinforcement in the form of threads made of synthetic fibers, which are embedded in rubber in the form of a cord fabric.
  • the outer appearance and especially the tread are determined by the rubber.
  • the shape of the tire must be very uniform and it must retain its dimensional stability as much as possible, even at high speeds . This presupposes that the carcass cord threads are spread and distributed as evenly as possible during tire manufacture. In particular, the weft threads must not provide any disruptive resistance.
  • tire cord fabrics are made with a slightly stretchable weft.
  • Such weft yarns consist of either polyester or nylon POY filament yarns, which achieve very high elongation values through extensive shrinking. With additional cotton staple twisting, the initial strength required for processing as well as sufficient sliding resistance and heat resistance can be achieved.
  • a decisive disadvantage of these yarns, however, is that they have fluctuating initial strengths due to the never quite similar BW twisting along their thread, which later have a negative effect on a uniform carcass cord spread in the tire.
  • tire cord fabrics are known, in which the weft threads are made of POY polyester filaments, which are subjected to additional heat treatment under certain tension on appropriate thread straps to fix or reduce the shrinkage and are pretreated with a rubber latex to prevent slipping or sliding between the warp threads are twisted with cotton threads (DE-A-27 48 747).
  • the relaxation corresponds only to the portion possible due to the wrapping.
  • the frictional stability is brought about by a latex jacket.
  • the elongation at break is given as 80 to 250%.
  • the known method has several disadvantages.
  • the heat treatment takes place under a certain thread tension.
  • the resulting forces put different loads on the thread in the most sensitive condition within the winding, which can lead to shrinkage and tension differences.
  • Another disadvantage is the use of a rubber latex to prevent the weft threads from sliding along the long sides of the warp threads, which requires an additional process step which adversely affects the economics of the process.
  • the abrasion consists of electrically charged rubber particles, which are difficult and expensive to remove and can lead to weaving problems.
  • the object of the invention is to provide a method for producing a polyester thread which has a rough, non-slip surface, a secant modulus of 0 to 50%, an initial modulus> 4 cN / dtex, high elongation at break, poor shrinkage and good adhesion without use of adhesion-promoting rubber latices.
  • a weft thread should in particular meet the high thermal and mechanical loads during impregnation, calendering and later processing into vehicle tires.
  • the weft thread is twisted at 40 to 200 U / m in a first process step and in a second process step the twisted thread is continuous for 0.1 to 60 s and at a temperature of 130 to 250 ° C. 22 to 55% is relaxed and tempered.
  • a thread twisted at 40 to 200 revolutions per meter has the advantageous property of roughness, which until now could only be achieved with a latex treatment.
  • the thread twisted in this way is practically only with a process-related pretensioning force for 0.1 to 60 s, in particular for 0.1 to 30 s, preferably for about 0.2 s in a vertical or horizontal heating shaft at more than 130 ° C. in particular at 130 to 250 ° C., preferably at about 230 ° C.
  • the short tem Perierzeit has the advantage that optimal properties of the weft threads are obtained without the known disadvantages at relatively high temperatures.
  • a shock-like temperature treatment is particularly advantageous since this results in minimal damage to the fibers and the best thread closure and a sliding-resistant surface are achieved. If necessary, a rubber-friendly treatment, for example based on epoxy or isocyanate, can also be carried out.
  • a targeted relaxation is achieved through a tension-free thermal treatment or with a controlled advance, which gives the thread a textured structure.
  • the elongation at break of the weft thread is between 150 and 350%. In general, particularly good results are obtained with an elongation at break of about 300%. This area has proven to be expedient for extreme loads, such as hot stretching at temperatures above 240 ° C.
  • a thermal shrinkage of +6 to -6, at 160 ° C. and 0.025 cN / tex thread tension, in particular a secant modulus of 0 to 50%, a reversibility limit of 0.2 to 0.6 cN / dtex and a Starting module from 4 to 10 cN / dtex is most appropriate.
  • a thread measurement variable that is independent of the titer is referred to as a secant module.
  • the secant modulus is defined by the gradient of a distance within the force-elongation curve in the flow area of a thread limited between 10 + 30% elongation. Extending the distance up to 100% theoretical expansion and parallel displacement of the resulting straight line through the zero point of the coordinate system leads to a theoretical force at 100% theoretical expansion.
  • the secant module defines this point as a percentage of the effective tensile strength (WO 84/02357).
  • the reversibility limit denotes the transition from the reversible to the irreversible stretching range.
  • the tensile strength of the thread is in the range of 0.6 to 2 cN / dtex and satisfies the stresses of the carcass fabric processed under normal tire production conditions.
  • the fibrils with irregular curvature cause a slight crimp, which contributes to the latex-free warp thread fixation in the carcass fabric.
  • a twist-free weft thread has the advantage that there are no running difficulties when canetting and weaving. It is advantageous to swirl the material in addition to the given rotations or to swirl exclusively.
  • the intermingling points or the number of knots per meter should be limited to 10 to 120 in order to obtain the correct, compact thread closure that keeps the dip absorption during impregnation within the correct limits.
  • a POY polyester dtex 190 f 36 produces at a spinning speed of> 3000 m / min is twisted to 100 t / m and then passed through a convection dryer heated to 230 ° C with 100% lead over the winding.
  • a convection dryer instead of a convection dryer, a contact dryer is also suitable.
  • the resulting yarn has a titer of -385 dtex. Its initial modulus is 6.25 cN / dtex, its reversibility limit is 0.4 cN / dtex and its elongation at break is 285%.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Woven Fabrics (AREA)

Abstract

A process is disclosed for production of a heat-treated, coarse fiber of polyester-POY, whereby the fiber is first twisted and then continuously relaxed and tempered at a temperature from 130 DEG to 250 DEG C. to an extent from 20 to 55%. The slide-resistant fiber produced in this manner, displaying an elongation at break from 150 to 350%, a thermal shrink from +6 to -6% can be employed without further pre-treatment as weft yarn for tire cord webs.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines hitzebehandelten, rauhen Fadens aus Polyester-POY, vorzugsweise als Schussfaden für ein Reifenkordgewebe, sowie einen nach dem Verfahren hergestellten Polyesterfaden.The invention relates to a method for producing a heat-treated, rough thread made of polyester POY, preferably as a weft thread for a tire cord fabric, and a polyester thread produced by the method.

Als Ausgangsmaterial für das erfindungsgemässe Verfahren dient ein Polyester-POY, hergestellt auf der Basis eines mindestens zu 90 %-Polyethylenterephthalats; mit einem Titer von 50-300 dtex und 20-50 Fibrillen.A polyester POY, produced on the basis of an at least 90% polyethylene terephthalate, serves as the starting material for the process according to the invention; with a titer of 50-300 dtex and 20-50 fibrils.

Fahrzeugreifen bekannter Bauart bestehen in den wesentlichen Teilen aus einem Festigkeitsträger in der Form von Fäden aus Kunstfasern, die in Form eines Kordgewebes in Gummi eingebettet sind. Die äussere Erscheinung und insbesondere die Lauffläche werden durch den Gummi bestimmt.Vehicle tires of known design consist in the essential parts of a reinforcement in the form of threads made of synthetic fibers, which are embedded in rubber in the form of a cord fabric. The outer appearance and especially the tread are determined by the rubber.

Damit solche Reifen mit einem Kordgewebe aus Kunstfasern gute Laufeigenschaften und eine lange Lebensdauer haben, müssen unter anderem zwei wichtige Bedingungen erfüllt sein: Der Reifen muss in seiner Form sehr gleichmässig sein, und er muss im Gebrauch, auch bei erhöhter Geschwindigkeit, seine Dimensionsstabilität möglichst behalten. Das setzt voraus, dass die Karkassekordfäden bei der Reifenherstellung möglichst gleichmässig gespreizt und verteilt werden. Insbesondere dürfen die Schussfäden dabei nicht störenden Widerstand entgegensetzen.In order for such tires with a cord fabric made of synthetic fibers to have good running properties and a long service life, two important conditions must be met, among other things: the shape of the tire must be very uniform and it must retain its dimensional stability as much as possible, even at high speeds . This presupposes that the carcass cord threads are spread and distributed as evenly as possible during tire manufacture. In particular, the weft threads must not provide any disruptive resistance.

Um dies zu erreichen sind Verfahren bekannt, bei denen die Karkassekordfäden in geordneter Fadenschar direkt in den Gummi kalandriert werden oder der Gewebeschuss vor dem Kalandrieren zwischen den Kordkettfäden durchgeschnitten wird. Beide Verfahren sind bezüglich Zuverlässigkeit nicht leicht zu kontrollieren.In order to achieve this, methods are known in which the carcass cord threads are calendered directly into the rubber in an orderly thread group or the fabric weft is cut between the cord warp threads prior to calendering. Both methods are not easy to control in terms of reliability.

Andere Verfahren bestehen darin, dass die Reifenkordgewebe mit leicht dehnbarem Schuss hergestellt werden.Other methods are that the tire cord fabrics are made with a slightly stretchable weft.

Solche Schussgarne bestehen entweder aus Polyester oder Nylon POY-Filamentgarnen, die durch weitgehendes Ausschrumpfen sehr hohe Dehnungswerte erreichen. Durch zusätzliche Baumwollstapelgarn-Umzwirnung kann eine für die Verarbeitung erforderliche Anfangsfestigkeit sowie ausreichende Schiebefestigkeit und Hitzebeständigkeit erreicht werden. Ein entscheidender Nachteil dieser Garne liegt jedoch darin, dass sie, durch die nie ganz gleiche BW-Umzwirnung entlang ihres Fadens, schwankende Anfangsfestigkeiten aufweisen, die sich dann später auf eine gleichmässige Karkassekordspreizung im Reifen negativ auswirken.Such weft yarns consist of either polyester or nylon POY filament yarns, which achieve very high elongation values through extensive shrinking. With additional cotton staple twisting, the initial strength required for processing as well as sufficient sliding resistance and heat resistance can be achieved. A decisive disadvantage of these yarns, however, is that they have fluctuating initial strengths due to the never quite similar BW twisting along their thread, which later have a negative effect on a uniform carcass cord spread in the tire.

Andere Reifenkordgewebe sind bekannt, bei welchen die Schussfäden aus POY-Polyesterfilamenten bestehen, welche zur Fixierung bzw. zur Reduktion des Schrumpfes einer zusätzlichen Hitzebehandlung unter bestimmter Spannung auf entsprechenden Gamträgern unterzogen und zur Verhinderung des Rutschens bzw. Gleitens zwischen den Kettfäden mit einem Gummilatex vorbehandelt bzw. mit Baumwollfäden umzwirnt werden (DE-A-27 48 747). Die Relaxation entspricht lediglich dem durch die Bewicklung möglichen Anteil. Bei dem bekannten Schussgarn wird die Reibungsstabilität durch einen Latexmantel bewirkt. Die Zerreissdehnung wird mit 80 bis 250 % angegeben.Other tire cord fabrics are known, in which the weft threads are made of POY polyester filaments, which are subjected to additional heat treatment under certain tension on appropriate thread straps to fix or reduce the shrinkage and are pretreated with a rubber latex to prevent slipping or sliding between the warp threads are twisted with cotton threads (DE-A-27 48 747). The relaxation corresponds only to the portion possible due to the wrapping. In the known weft yarn, the frictional stability is brought about by a latex jacket. The elongation at break is given as 80 to 250%.

Das bekannte Verfahren weist mehrere Nachteile auf. Die Wärmebehandlung erfolgt, zur Vermeidung übermässiger Schrumpfung, unter einer bestimmten Fadenzugkraft. Die dabei resultierenden Kräfte belasten den Faden innerhalb der Bewicklung unterschiedlich in seinem empfindlichsten Zustand, wodurch es zu Schrumpf- und Spannungsdifferenzen kommen kann.The known method has several disadvantages. In order to avoid excessive shrinkage, the heat treatment takes place under a certain thread tension. The resulting forces put different loads on the thread in the most sensitive condition within the winding, which can lead to shrinkage and tension differences.

Bei hochtemperaturimprägnierten Geweben (-240°C) mit den bekannten Schussfilamenten von weniger als 100 % Restreissdehnung, zerreissen häufig die Schussfäden wenn der Reifenrohling durch Expansion in seine erforderliche Form gebracht wird.With high temperature impregnated fabrics (-240 ° C) with the known weft filaments of less than 100% residual elongation at break, the weft threads often tear when the green tire is brought into its required shape by expansion.

Ein weiterer Nachteil ist die Verwendung eines Gummilatex zur Verhinderung des Gleitens der Schussfäden entlang der Längsseiten der Kettfäden, wodurch ein zusätzlicher Verfahrensschritt erforderlich ist, welcher die Wirtschaftlichkeit des Verfahrens nachteilig beeinflusst.Another disadvantage is the use of a rubber latex to prevent the weft threads from sliding along the long sides of the warp threads, which requires an additional process step which adversely affects the economics of the process.

Ein weiterer beachtlicher Nachteil der Verwendung von Latices ist der beim Weben entstehende Abrieb. Der Abrieb besteht aus elektrisch geladenen Gummiteilchen, welche nur schwer und aufwendig zu entfernen sind und zu Weblaufstörungen führen können.Another significant disadvantage of using latices is the abrasion that occurs during weaving. The abrasion consists of electrically charged rubber particles, which are difficult and expensive to remove and can lead to weaving problems.

Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung eines Polyester-Fadens zu schaffen, welcher eine rauhe, schiebefeste Oberfläche, einen Sekantenmodul von 0 bis 50 %, einen Anfangsmodul >4 cN/dtex, hohe Zerreissdehnung, armen Schrumpf und gute Adhäsion ohne Verwendung von haftvermittelnden Gummilatices, aufweist. Ein solcher Schussfaden soll besonders den hohen thermischen und mechanischen Belastungen beim Imprägnieren, Kalandrieren und späteren Verarbeiten zu Fahrzeugreifen genügen.The object of the invention is to provide a method for producing a polyester thread which has a rough, non-slip surface, a secant modulus of 0 to 50%, an initial modulus> 4 cN / dtex, high elongation at break, poor shrinkage and good adhesion without use of adhesion-promoting rubber latices. Such a weft thread should in particular meet the high thermal and mechanical loads during impregnation, calendering and later processing into vehicle tires.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass der Schussfaden in einem ersten Verfahrensschritt mit 40 bis 200 U/m gezwirnt wird und in einem zweiten Verfahrensschritt der gezwirnte Faden kontinuierlich während von 0,1 bis 60 s und bei einer Temperatur von 130 bis 250°C 22 bis 55 % relaxiert und getempert wird.This object is achieved according to the invention in that the weft thread is twisted at 40 to 200 U / m in a first process step and in a second process step the twisted thread is continuous for 0.1 to 60 s and at a temperature of 130 to 250 ° C. 22 to 55% is relaxed and tempered.

Ein bei 40 bis 200 Umdrehungen pro Meter gezwirnter Faden hat die vorteilhafte Eigenschaft der Rauhigkeit, welche bisher nur mit einer Latexbehandlung erzielt werden konnte. Der auf diese Weise gezwimte Faden wird praktisch nur bei prozessbedingter Vorspannkraft während 0,1 bis 60 s, insbesondere während 0,1 bis 30 s, bevorzugt während ca. 0,2 s in einem vertikalen oder horizontalen Heizschacht bei mehr als 130°C, insbesondere bei 130 bis 250°C, bevorzugt bei ca. 230°C temperiert. Die kurze Temperierzeit hat den Vorteil, dass bei relativ hohen Temperaturen optimale Eigenschaften der Schussfäden ohne die bekannten Nachteile erhalten werden.A thread twisted at 40 to 200 revolutions per meter has the advantageous property of roughness, which until now could only be achieved with a latex treatment. The thread twisted in this way is practically only with a process-related pretensioning force for 0.1 to 60 s, in particular for 0.1 to 30 s, preferably for about 0.2 s in a vertical or horizontal heating shaft at more than 130 ° C. in particular at 130 to 250 ° C., preferably at about 230 ° C. The short tem Perierzeit has the advantage that optimal properties of the weft threads are obtained without the known disadvantages at relatively high temperatures.

Es ist zweckmässig, als Schussfaden ein POY-Garn zu verwenden. Besonders vorteilhaft ist eine schockartige Temperaturbehandlung, da dadurch eine minimale Schädigung der Fasern erfolgt und bester Fadenschluss und eine schiebefeste Oberfläche erreicht werden. Im Bedarfsfall kann zusätzlich eine gummifreundliche Behandlung beispielsweise auf Basis Epoxid oder Isocyanat erfolgen.It is advisable to use POY yarn as the weft. A shock-like temperature treatment is particularly advantageous since this results in minimal damage to the fibers and the best thread closure and a sliding-resistant surface are achieved. If necessary, a rubber-friendly treatment, for example based on epoxy or isocyanate, can also be carried out.

Durch eine spannungslose bzw. mit gesteuerter Voreilung durchgeführte thermische Behandlung wird eine gezielte Relaxation erreicht, wodurch der Faden eine texturierte Struktur erhält.A targeted relaxation is achieved through a tension-free thermal treatment or with a controlled advance, which gives the thread a textured structure.

Es ist zweckmässig die thermische Behandlung mittels eines Konvektions- oder Kontaktheizers vorzunehmen. Zudem ist es möglich, durch zusätzliche thermische Nachbehandlungen den Fixiergrad zu erhöhen.It is advisable to carry out the thermal treatment using a convection or contact heater. It is also possible to increase the degree of fixation by means of additional thermal after-treatments.

Die Bruchdehnung des Schussfadens liegt zwischen 150 und 350 %. Im allgemeinen werden besonders gute Ergebnisse mit einer Bruchdehnung von etwa 300 % erhalten. Dieser Bereich hat sich bei extremer Belastung, etwa bei der Gewebeheissverstreckung mit Temperaturen über 240°C, als zweckmässig erwiesen.The elongation at break of the weft thread is between 150 and 350%. In general, particularly good results are obtained with an elongation at break of about 300%. This area has proven to be expedient for extreme loads, such as hot stretching at temperatures above 240 ° C.

In Verbindung mit der Bruchdehnung ist ein Thermoschrumpf von +6 bis -6, bei 160°C und 0,025 cN/tex Fadenzugkraft, insbesondere ein Sekantenmodul von 0 bis 50 %, eine Reversibilitätsgrenze von 0,2 bis 0,6 cN/dtex und ein Anfangsmodul von 4 bis 10 cN/dtex am zweckmässigsten.In connection with the elongation at break, a thermal shrinkage of +6 to -6, at 160 ° C. and 0.025 cN / tex thread tension, in particular a secant modulus of 0 to 50%, a reversibility limit of 0.2 to 0.6 cN / dtex and a Starting module from 4 to 10 cN / dtex is most appropriate.

Als ein Sekantenmodul wird eine vom Titer unabhängige Faden-Messgrösse bezeichnet. Der Sekantenmodul ist definiert durch die Steigung einer Strecke innerhalb der Kraft-Dehnungskurve im Fliessbereich eines Fadens begrenzt zwischen 10 + 30 % Dehnung. Die Verlängerung der Strecke bis zu theoretisch 100 % Dehnung und Parallelverschiebung der resultierenden Geraden durch den Nullpunkt des Koordinatensystems, führt zu einer theoretischen Kraft bei 100 % theoretischer Dehnung. Der Sekantenmodul definiert diesen Punkt als prozentualen Anteil der effektiven Reisskraft (WO 84/02357).A thread measurement variable that is independent of the titer is referred to as a secant module. The secant modulus is defined by the gradient of a distance within the force-elongation curve in the flow area of a thread limited between 10 + 30% elongation. Extending the distance up to 100% theoretical expansion and parallel displacement of the resulting straight line through the zero point of the coordinate system leads to a theoretical force at 100% theoretical expansion. The secant module defines this point as a percentage of the effective tensile strength (WO 84/02357).

Die Reversibilitätsgrenze bezeichnet den Uebergang vom reversiblen in den irreversiblen Dehnungsbereich.The reversibility limit denotes the transition from the reversible to the irreversible stretching range.

Die Reissfestigkeit des Fadens liegt im Bereich von 0,6 bis 2 cN/dtex und genügt den Beanspruchungen der unter üblichen Reifenproduktionsbedingungen verarbeiteten Karkassengewebe.The tensile strength of the thread is in the range of 0.6 to 2 cN / dtex and satisfies the stresses of the carcass fabric processed under normal tire production conditions.

Durch die Fibrillen mit unregelmässiger Krümmung wird eine leichte Kräuselung hervorgerufen, welche zur latexfreien Kettfadenfixierung im Karkassengewebe beiträgt.The fibrils with irregular curvature cause a slight crimp, which contributes to the latex-free warp thread fixation in the carcass fabric.

Ein verdrehungsfreier Schussfaden hat den Vorteil, dass keine Laufschwierigkeiten beim Canettieren und Verweben auftreten. Es ist vorteilhaft, zu den gegebenen Drehungen das Material zusätzlich zu verwirbeln oder ausschliesslich zu verwirbeln. Die Verwirbelungspunkte bzw. die Knotenzahl pro Meter sind dabei auf 10 bis 120 zu beschränken, um den richtigen, kompakten Fadenschluss zu erhalten, der die Dipaufnahme beim Imprägnieren in richtigen Grenzen hält.A twist-free weft thread has the advantage that there are no running difficulties when canetting and weaving. It is advantageous to swirl the material in addition to the given rotations or to swirl exclusively. The intermingling points or the number of knots per meter should be limited to 10 to 120 in order to obtain the correct, compact thread closure that keeps the dip absorption during impregnation within the correct limits.

Die Erfindung soll anhand eines Beispieles näher erläutert werden.The invention will be explained in more detail using an example.

Beispielexample

Ein POY-Polyester dtex 190 f 36 produziert bei einer Spinngeschwindigkeit von > 3000 m/min wird auf 100 t/m aufgezwirnt und anschliessend mit 100 % Voreilung gegenüber der Aufspulung durch ein auf 230°C beheizten Konvektionstrockner geführt. Anstelle eines Konvektionstrockners ist auch ein Kontakttrockner geeignet.A POY polyester dtex 190 f 36 produces at a spinning speed of> 3000 m / min is twisted to 100 t / m and then passed through a convection dryer heated to 230 ° C with 100% lead over the winding. Instead of a convection dryer, a contact dryer is also suitable.

Das daraus resultierende Garn hat einen Titer von -385 dtex. Sein Anfangsmodul beträgt 6,25 cN/dtex, seine Reversibilitätsgrenze liegt bei 0,4 cN/dtex und seine Bruchdehnung bei 285 %.The resulting yarn has a titer of -385 dtex. Its initial modulus is 6.25 cN / dtex, its reversibility limit is 0.4 cN / dtex and its elongation at break is 285%.

Die Ergebnisse des erfindungsgemäss hergestellten Fadens sind nachstehend tabellarisch zusammengefasst.

Figure imgb0001
The results of the thread produced according to the invention are summarized in the table below.
Figure imgb0001

Claims (9)

1. Process for the production of a heat-treated, coarse fiber of polyester-POY, preferably in the form of a weft fiber for a tire cord web, characterized in twisting the fiber in a first step with 40 to 200 tpm and continuously relaxing and tempering the twisted fiber in a second step over a period of 0.1 to 60 seconds, at a temperature from 130 to 250°C, to an extent from 20 to 55%.
2. The process according to claims 1 and 2, wherein the thermal treatment is performed shock-like.
3. The process according to claims 1 and 2, wherein the thermal treatment is performed without any tension and with controlled overfeed.
4. The process according to the claims 1 to 3, wherein the thermal treatment is performed by means of a convection heater or of a contact heater.
5. Fiber produced according to the process of the claims 1 to 4, characterized in that said fiber simultaneously satisfies the following conditions: the surface of said fiber is coarse and non-slip; said fiber displays a breaking elongation from 150 to 350%; a thermal shrink from +6 to -6%; a secant modulus from 0 to 50%; a reversibility limit from 0.2 to 0.6 cN/dtex and an initial modulus from 4 to 10 cN/dtex.
6. The fiber according to claim 5, further characterized by a tensile strength from 0.6 to 3 cN/dtex.
7. The fiber according to the claims 5 and 6, further characterized by fibrels with irregular sinuosities.
8. The fiber according to the claims 5 to 7, further characterized by being distortion-free.
9. The fiber according to the claims 6 to 8, further characterized by a compact fibrels bundle with 100 to 500 tpm and/or an intermingling of 10 to 100 intermingling points per meter.
EP86201972A 1985-11-20 1986-11-12 Method for producing a weft thread from poy polyester Expired - Lifetime EP0223301B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86201972T ATE50005T1 (en) 1985-11-20 1986-11-12 PROCESS FOR MAKING A POLYESTER-POY WEFT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH494485 1985-11-20
CH4944/85 1985-11-20

Publications (2)

Publication Number Publication Date
EP0223301A1 EP0223301A1 (en) 1987-05-27
EP0223301B1 true EP0223301B1 (en) 1990-01-31

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ID=4285242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201972A Expired - Lifetime EP0223301B1 (en) 1985-11-20 1986-11-12 Method for producing a weft thread from poy polyester

Country Status (6)

Country Link
US (1) US4760690A (en)
EP (1) EP0223301B1 (en)
JP (1) JPS62133142A (en)
AT (1) ATE50005T1 (en)
DE (1) DE3668647D1 (en)
ES (1) ES2013712B3 (en)

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DE4316415A1 (en) * 1993-05-17 1994-11-24 Akzo Nobel Nv Fabric web

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US4816028A (en) * 1987-07-01 1989-03-28 Indu Kapadia Woven vascular graft
BR8807133A (en) * 1987-07-17 1989-10-31 Rhodia PROCESS FOR PRE-INTERLACING A SYNTHETIC POWER YARN, INTERLACED YARN PRODUCED BY THIS PROCESS AND USE OF THIS YARN
EP0319940A1 (en) * 1987-12-09 1989-06-14 Hoechst Aktiengesellschaft Vehicle tyres
DE3834139A1 (en) * 1988-10-07 1990-04-19 Hoechst Ag TWO-COMPONENT LOOP SEWING YARN AND METHOD FOR THE PRODUCTION THEREOF
US5249414A (en) * 1990-07-09 1993-10-05 Nissinbo Industries, Inc. Yarn for use in set up
DE59603535D1 (en) * 1995-01-25 1999-12-09 Rhodia Filtec Ag Emmenbruecke METHOD FOR PRODUCING A POLYESTER WIRE YARN FOR TIRE CORD FABRIC
DE10012904B4 (en) * 2000-03-16 2004-08-12 Lewa Herbert Ott Gmbh + Co Membrane clamping with elasticity compensation
EP1288357A1 (en) * 2001-08-10 2003-03-05 Milliken Europe N.V. Woven cord fabric
ES2728571T3 (en) * 2014-05-05 2019-10-25 Filmop Int S R L POY thread

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NL112331C (en) * 1958-06-28
GB954824A (en) * 1961-05-01 1964-04-08 Teikoku Jinzo Kenshi Kk Process for the production of filamentary reinforcing material
GB1110751A (en) * 1964-06-22 1968-04-24 Goodyear Tire & Rubber Tire cord
AU423122B2 (en) * 1968-09-04 1972-04-07 Imperial Chemical Industries Limited Drawing process
DE2023526A1 (en) * 1970-05-14 1971-11-25 Farbwerke Hoechst AG, vorm. Meister Lucius & Brüning, 6000 Frankfurt Process for the production of low-shrinkage polyester threads
GB1590809A (en) * 1976-11-05 1981-06-10 Teijin Ltd Tyre cord fabric and tyre construction
JPS56330A (en) * 1979-06-15 1981-01-06 Teijin Ltd Original fiber for tire cord textile woof and tire cord textile
JPS5637329A (en) * 1979-08-31 1981-04-11 Teijin Ltd Raw yarn for weft yarn of tire cord fabric
US4563392A (en) * 1982-03-19 1986-01-07 Allied Corporation Coated extended chain polyolefin fiber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316415A1 (en) * 1993-05-17 1994-11-24 Akzo Nobel Nv Fabric web
DE4316415C2 (en) * 1993-05-17 2003-10-16 Akzo Nobel Nv Process for the production of a fabric web

Also Published As

Publication number Publication date
DE3668647D1 (en) 1990-03-08
ATE50005T1 (en) 1990-02-15
US4760690A (en) 1988-08-02
JPH0474460B2 (en) 1992-11-26
EP0223301A1 (en) 1987-05-27
ES2013712B3 (en) 1990-06-01
JPS62133142A (en) 1987-06-16

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