EP0569889B1 - Drawing process - Google Patents

Drawing process Download PDF

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Publication number
EP0569889B1
EP0569889B1 EP93107495A EP93107495A EP0569889B1 EP 0569889 B1 EP0569889 B1 EP 0569889B1 EP 93107495 A EP93107495 A EP 93107495A EP 93107495 A EP93107495 A EP 93107495A EP 0569889 B1 EP0569889 B1 EP 0569889B1
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EP
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Prior art keywords
yarn
drawn
multifilament yarn
multifilament
core
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EP93107495A
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German (de)
French (fr)
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EP0569889A1 (en
Inventor
Karl Greifeneder
Kurt Truckenmüller
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Amann and Soehne GmbH and Co KG
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Amann and Soehne GmbH and Co KG
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    • 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
    • D02J1/224—Selection or control of the temperature during stretching
    • 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
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/165—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam characterised by the use of certain filaments or yarns

Definitions

  • the present invention relates to a method for drawing a pre-oriented multifilament yarn (POY yarn) with the features of the preamble of claim 1.
  • POY yarn pre-oriented multifilament yarns
  • a main draw zone the main draw zone having a delivery godet and a take-off godet.
  • the multifilament yarn is looped around both the delivery godet and the take-off godet, so that there are two clamping points between which the multifilament yarn is drawn.
  • a heated pin is also arranged in the known main stretching zone, which is also wrapped in the yarn.
  • the multifilament yarn to be drawn is drawn at a first speed fed to the main stretching zone and withdrawn from there at a second speed from the main stretching zone, the second speed in the known device being up to about 60% higher than the first speed, so that a corresponding tensile stress is exerted on the multifilament yarn.
  • a further increase in the take-off speed is not possible in the known device, since otherwise breaks in individual filaments occur, which lead to permanent damage to the drawn multifilament yarn.
  • EP-A 0 119 044 A method with the features of the preamble of claim 1 is known from EP-A 0 119 044.
  • a pre-oriented multifilament yarn (POY yarn) is used as the starting material, which is drawn exclusively in a main stretching zone consisting of a delivery godet wrapped in the yarn and a take-off godet wrapped in the yarn.
  • EP-A 0 119 044 expressly points out that in the known method the draw ratio varies between 1: 1.45 and 1: 1.6, the known drawing of the pre-oriented multifilament yarn (POY yarn) being carried out exclusively in the cold in order to trigger a high shrinkage in the thermal treatment carried out after stretching.
  • the present invention has for its object to provide a method for drawing a multifilament yarn in which no filament breaks occur even at higher take-off speeds (second speed).
  • the multifilament yarn to be drawn is fed at a first speed to the main stretching zone via a delivery godet wrapped in the yarn and drawn off from the main stretching zone at a second speed via a take-off godet wrapped around the yarn.
  • the second speed is greater than the first speed.
  • the take-off godet is heated to a temperature between 160 ° C.
  • the first and second speeds being matched to one another in such a way that the second speed is 70% to 180% greater than the first speed. This ensures that the pre-oriented multifilament yarn (POY yarn) to be drawn is thus drawn with a draw ratio of 1: 1.7 to 1: 2.8 in the process according to the invention.
  • the POY yarns in particular polyester POY yarns
  • this is attributed to the fact that the known heated stretching pin in the main stretching zone or the known cold stretching are deliberately dispensed with here.
  • the multifilament yarns drawn in this way also surprisingly have relatively low shrinkage values, in particular boil-off shrinkage values (water 98 ° C.) of less than 1% and hot air shrinkage values at 160 ° C. less than 1.5%.
  • the multifilament yarns drawn by the process according to the invention have a tensile strength which is between 20% and 80% higher than the tensile strengths with identical starting materials can be achieved by using the conventional method described above.
  • a first, particularly suitable embodiment of the method according to the invention provides that here the first and second speeds are coordinated with one another in such a way that the second speed is 100% to 160% greater than the first speed.
  • degrees of stretching are used which vary between 1: 2 and 1: 2.6.
  • the multifilament yarns stretched in this way which are preferably polyester multifilament yarns, are distinguished by even lower shrinkage values, in particular by boiling shrinkage values (water 98 ° C.) of less than 0.8% and heat shrinkage values (160 ° C.) of less than 1.2%. , out.
  • the tensile strengths of the multifilament yarns drawn in this way are also higher by approximately 60% to 80% compared to conventionally drawn multifilament yarns.
  • Another embodiment of the process according to the invention provides that the delivery godet is also heated to a temperature between 60 ° C. and 160 ° C., preferably to a temperature between 80 ° C. and 140 ° C.
  • a further embodiment of the method according to the invention provides that the multifilament yarn to be drawn is heated to a temperature between 80 ° C. and 180 ° C. in the main drawing zone, ie between the delivery godet and the take-off godet. This will heat up the stretched Multifilament yarns carried out in the main stretching zone in such a way that a hot plate, an IR radiator and / or a laser are used for this purpose.
  • this residence time varies in particular between 0.01 s and 1 s.
  • the delivery godet and the take-off godet are looped around with the multifilament yarn to be drawn, as already described above. It has been shown here that particularly high strengths and particularly low shrinkage values result when the delivery godet and / or the take-off godet is wrapped 5 to 40 times, preferably 10 to 20 times, with the multifilament yarn to be drawn. These wrapping values relate to godets whose diameters vary between approximately 40 mm and 250 mm, preferably 80 mm and 120 mm.
  • Another, particularly suitable embodiment of the method according to the invention provides that, seen in the direction of transport of the multifilament yarn to be drawn, a pre-drawing zone is arranged in front of the main drawing zone.
  • the multifilament yarn (POY yarn) to be drawn is first partially in the pre-drawing zone stretched and then finally stretched in the main stretching zone.
  • the multifilament yarn in the pre-stretching zone between 0.5% and 10%, preferably between 1% and 4%.
  • the multifilament yarn is thus stretched in the pre-stretching zone between 0.5% and 10%, preferably between 1% and 4%.
  • pre-stretching or stretching speeds it should be noted that the aforementioned high strengths and low shrinkage values can be achieved particularly economically and reproducibly if one selects take-off speeds that are preferably between 600 m / min and 1,200 m / min.
  • a relaxation zone is arranged behind the main drawing zone, in which the drawn multifilament yarn is heated to a temperature between 80 ° C and 240 ° C, preferably to a temperature between 140 ° C and 200 ° C, is heated. It has been shown here that such a relaxation zone further reduces the aforementioned shrinkage values of the drawn multifilament yarn by about 20% to about 40%, in particular when the drawn multifilament yarn is introduced into the relaxation zone with lead, which is preferably between 0.5% and 10% and in particular between 1% and 3%.
  • the residence time of the multifilament yarn in the relaxation zone then varies depending on the respective transport speed of the yarn through the relaxation zone and is preferably 0.01 s to 1 s.
  • the selection of the multifilament yarn (POY yarn) to be drawn by the method according to the invention is based on the later use of this drawn yarn. If, for example, the drawn yarn is later processed into a sewing thread, it is advisable to select such a POY multifilament thread whose single-filament titer as the starting material varies between 1 dtex and 12 dtex, preferably between 1.5 dtex and 4 dtex.
  • the total titer of the POY yarn to be drawn in each case also depends on the later use of the drawn yarn. For use of the drawn yarn to produce a sewing thread, this total titer of the yarn to be drawn varies between 40 dtex and 2,000 dtex, preferably between 80 dtex and 1,200 dtex.
  • a POY yarn is used for this which has a number of filaments between 16 and 300, preferably between 24 and 96.
  • a particularly suitable embodiment of the method according to the invention provides that the pre-oriented multifilament yarn to be drawn is a polyester POY yarn, as has already been mentioned several times above.
  • a polyester POY yarn is used as the starting material, the intrinsic viscosity of which is between 0.5 dl / g and 0.75 dl / g, preferably between 0.55 dl / g and 0.63 dl / g.
  • high-strength multifilament yarns can be made from a textile standard multifilament yarn without it being necessary, as in the current state of the art, for example to increase the molecular weights of the polymer or to vary the monomers.
  • the method according to the invention can in particular also be used to produce preliminary products for the production of sewing threads.
  • the multifilament yarn stretched according to the invention is processed as core material in a core yarn, in which case this core yarn itself or two to four core yarns form a sewing yarn, as is described in detail in DE-A-4 215 212.
  • a particularly suitable development of the method according to the invention described above, which is used in particular for the production of sewing threads, provides that after the stretching, the stretched multifilament thread with at least one second multifilament thread with formation of a thread provided with loops and loops in a turbulent fluid stream, in particular one Gas flow, swirled.
  • a swirled core-sheath yarn thus arises, the multifilament yarn drawn by the method according to the invention being arranged in the core (core), while the sheath (effect material) is formed by the at least one second multifilament yarn.
  • Such a sewing thread which preferably consists of polyester multifilaments, then has strengths as the finished product, which are preferably between 40 cN / tex and 60 cN / tex, the residual shrinkage of the finished thread preferably being less than 2% (thermal shrinkage 160 ° C.) or less than 1.2% (boiling water shrinkage 98 ° C).
  • a swirled sewing thread has an excellent sewing behavior, which is expressed by the fact that it is extremely difficult Sewing operations, such as multidirectional sewing at up to 7,000 stitches per minute or buttonhole sewing, do not tear or cause other disruptions when sewing.
  • such a sewing thread can also be excellently dyed in terms of color and color uniformity, which is attributed to the fact that this sewing thread has a specially stretched multifilament thread as the core material, but otherwise corresponds in its molecular structure to a standard textile fiber.
  • the drawn multifilament yarn is led with a lead of between 1% and 7% and the second multifilament yarn forming the effect material with an advance of between 15% and 45% of the intermingling.
  • the stretched multifilament yarn is also wetted with water or an aqueous dispersion before intermingling, this causes the core material to be mixed particularly intensively with the effect material, so that this also results in an increase in thread closure.
  • such for the second multifilament yarn Material is selected whose titer is 15% to 40% and whose number of filaments is 30% to 250%, in each case based on the titer or the number of filaments of the multifilament yarn forming the core (first yarn component) of the core-sheath yarn.
  • a pre-oriented multifilament yarn (POY yarn) is also used as the second multifilament yarn.
  • This pre-oriented multifilament yarn which, like the stretched multifilament yarn used as the core, consists of polyester, can either be drawn according to the conventional method described at the beginning of the prior art, or preferably also drawn as described in detail above in the various embodiments of the method according to the invention is.
  • the variants described at the beginning of the process according to the invention which relate to the temperature range of the delivery godet, to the heating of the multifilament yarn in the main stretching zone, to the times during heating, to the wrapping of the delivery godet and / or the take-off godet, to the arrangement of a pre-stretching zone, to the Leading in the pre-drawing zone, the drawing speed, the arrangement of a relaxation zone, the leading in the relaxation zone and the selection of the intrinsic viscosity of the yarn used can also be used identically for the drawing of the second multifilament yarn (fancy yarn), so that in order to avoid repetition, reference is made to the design variants described in detail above.
  • the multifilament yarn forming the core of the core-sheath yarn and the multifilament yarn forming the sheath of the core-sheath yarn are drawn identically, so that the intermingled core-sheath yarn produced therefrom is characterized in particular by this that it stains identically both from the hue and from the depth of color.
  • a further, particularly suitable embodiment of the method according to the invention provides that one to four multifilament yarns forming the core of the intermingled core-sheath yarn and drawn according to the stretching methods described at the beginning with one to four, the sheath component of the intermingled core-sheath yarn forming multifilament yarn or forming yarn swirled.
  • the intermingled core-sheath yarn after the intermingling with a twist of between 10 turns per meter and 1,000 turns per meter, preferably between 100 Turns per meter and 600 turns per meter.
  • a further embodiment variant of the method according to the invention provides that the intermingled core-sheath yarn is subjected to a tension treatment so that the self-intersecting loops or loops formed during intermingling are reduced to such an extent that they become their diameter can be reduced by about 20% to about 95% of their original diameter.
  • the volume of the intermingled yarn is reduced accordingly, so that such a Yarn has a reduced number of protruding loops and loops, so that these loops and loops get caught in the processing and in particular when such a yarn is used as a sewing thread.
  • the intermingled core-jacket yarn is fed to the tension treatment at a rate which is between 0.1% and 5%, preferably between 0.1% and 2.5%, less than the rate, with which the interlaced yarn is withdrawn from the tension treatment.
  • the reduction in the diameter of the loops or loops of the entangled yarn described above can be achieved by subjecting the entangled core-jacket yarn to thermal treatment at a temperature between 100 ° C. and 250 ° C., in particular between 180 ° C. and 240 ° C, subject.
  • This thermal treatment is preferably carried out in a hot air stream, the times of the thermal treatment varying in particular between 0.01 s and 10 s, preferably between 0.05 s and 1 s.
  • Such thermal treatment also serves to reduce the shrinkage values (cooking shrinkage - water, hot air shrinkage) of the intermingled core-sheath yarn.
  • another embodiment of the method according to the invention provides that the intermingled yarn of the thermal Treatment at a rate higher than the rate at which the core-sheath yarn is removed from the thermal treatment.
  • the core-sheath yarn is preferably fed to the thermal treatment at a speed which is 0.5% to 10%, in particular 1% to 3%, higher than the withdrawal speed of the core-sheath yarn from the thermal treatment.
  • the core-sheath yarn can shrink freely during the thermal treatment, which in turn is expressed extremely positively in the residual shrinkage of the correspondingly treated core-sheath yarn.
  • the method according to the invention is preferably used for polyester multifilaments, polyester being understood as meaning polyethylene terephthalate in the context of the present application.
  • POY yarn partially oriented yarn or pre-oriented yarn used in the present text encompasses all pre-oriented polymeric multifilament yarns which have undergone a certain amount of pre-orientation in the course of their manufacturing process, but this size of the molecular pre-orientation does not correspond to the molecular orientation corresponds, which has a fully drawn multifilament yarn.
  • a polyester POY yarn designated K with an initial titer of 410 dtex and a number of filaments of 40 was drawn on a system shown schematically in FIG.
  • the system had a main stretch zone, which is formed between a delivery godet 1 and a take-off godet 2.
  • the multifilament yarn K had looped the delivery godet 1 and the take-off godet 2 20 times each.
  • the feed speed of the yarn K to the delivery godet and the withdrawal speed of the yarn K from the withdrawal godet 2 were coordinated with one another in such a way that the POY yarn K was drawn in the main drawing zone with a drawing degree of 1: 2.35.
  • a pre-stretching zone which comprised a delivery unit 5 and the delivery godet 1.
  • the speed of the delivery unit 5 was adapted to the speed of the delivery godet 1 such that the POY yarn K was drawn by 5% in the pre-drawing zone.
  • a second yarn E like the yarn K, was fed from a cone (not shown) to a delivery unit 6.
  • the yarn was then transported to a delivery godet 3 and drawn off from there by a take-off godet 4.
  • the delivery godet 3 and the take-off godet 4 formed the main stretching zone for the polyester POY yarn E.
  • the speeds were this two godets (3 and 4) matched to one another in such a way that the POY yarn E was drawn in the main drawing zone with a drawing degree of 1: 2.0.
  • a pre-stretching zone was arranged, which consisted of the delivery unit 6 and the delivery godet 3. In this pre-drawing zone, the yarn E was pre-drawn by 5%.
  • Yarn E was a polyester POY yarn with a titer of 131 dtex and a filament number of 24.
  • the godets 1 and 3 were heated to a temperature of 90 ° C.
  • the temperature of godets 2 and 4 was 200 ° C.
  • the godets E and 20 were each looped around the godets 3 and 4, too.
  • the stretching speed was 800 m / min.
  • the godets 1 to 4 have a diameter of 150 mm.
  • the yarn K was wetted with water via a wetting device 7 and from there came into a nozzle 8 in the direction of the arrow 11, while the yarn E was transported directly into the nozzle 8 (in the direction of the arrow 11) without wetting.
  • the advance of the yarn K was 5%, while the advance of the yarn E was 18%.
  • the yarns K and E were intermingled in the nozzle 8.
  • a heating tube 9 was arranged, in which the intermingled core-jacket yarn, in which the yarn K formed the core and the yarn E the jacket, to a temperature of Was heated to 180 ° C.
  • the advance in the introduction into the heating device 9 was 2%.
  • the length of the heating device 9 was 2 m, the intermingled core-sheath yarn being transported through the heating device 9 at a speed of 800 m / min.
  • the intermingled core-sheath yarn N was wound up at the outlet of the heating device 9.
  • the sewing thread N thus produced was then conventionally dyed and finished. According to this, the sewing thread had a cooking shrinkage (water 98 ° C) of 0.8% and a hot air shrinkage (160 ° C) of 1%.
  • the specific strength of the sewing thread was 55 cN / tex.
  • the sewing thread thus produced was subjected to industrial sewing operations.
  • the multidirectional sewing at a stitch density of 7,000 stitches per minute and the buttonhole properties were examined. It was found that the sewing thread produced by the process described above did not differ in its sewing properties from an analogue material in which high-strength polyester multifilament threads, that is to say those threads which had a much higher molecular weight, were processed as core material and as effect material .

Abstract

A process is described for drawing a partially oriented (pre-oriented) multifilament yarn (POY). The yarn is delivered into a main drawing zone coiled around a feed godet revolving at a first speed and leaves the main drawing zone coiled around a take-off godet revolving at a second speed. The drawing in the main drawing zone takes place exclusively between the feed godet and the take-off godet, the take-off godet being heated to a temperature between 160 DEG C and 240 DEG C. The first speed and the second speed are mutually adapted to each other in such a way that the second speed is 70 % to 180 % greater than the first speed. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Verstrecken eines vororientierten Multifilamentgarnes (POY-Garn) mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The present invention relates to a method for drawing a pre-oriented multifilament yarn (POY yarn) with the features of the preamble of claim 1.

Um vororientierte Multifilamentgarne (POY-Garn) zu verstrecken, ist es bekannt, die Multifilamentgarne einer Hauptstreckzone zuzuführen, wobei die Hauptstreckzone eine Liefergalette und eine Abzugsgalette aufweist. Hierbei wird das Multifilamentgarn sowohl um die Liefergalette als auch um die Abzugsgalette geschlungen, so daß zwei Klemmpunkte entstehen, zwischen denen die verstreckung des Multifilamentgarnes erfolgt. Zwischen der Liefergalette und der Abzugsgalette ist desweiteren bei der bekannten Hauptstreckzone ein geheizter Stift angeordnet, der ebenfalls vom Garn umschlungen ist. Um die gewünschte Verstreckung zu erzielen, wird das zu verstreckende Multifilamentgarn mit einer ersten Geschwindigkeit der Hauptstreckzone zugeführt und von dort mit einer zweiten Geschwindigkeit aus der Hauptstreckzone abgezogen, wobei die zweite Geschwindigkeit bei der bekannten Vorrichtung bis zu etwa 60 % höher ist als die erste Geschwindigkeit, so daß eine entsprechende Zugbeanspruchung auf das Multifilamentgarn ausgeübt wird. Eine weitere Steigerung der Abzugsgeschwindigkeit ist bei der bekannten Vorrichtung nicht möglich, da ansonsten in unerwünschter Weise Brüche an einzelnen Filamenten auftreten, die zu einer dauerhaften Schädigung des verstreckten Multifilamentgarnes führen.In order to draw pre-oriented multifilament yarns (POY yarn), it is known to feed the multifilament yarns to a main draw zone, the main draw zone having a delivery godet and a take-off godet. Here, the multifilament yarn is looped around both the delivery godet and the take-off godet, so that there are two clamping points between which the multifilament yarn is drawn. Between the delivery godet and the take-off godet, a heated pin is also arranged in the known main stretching zone, which is also wrapped in the yarn. In order to achieve the desired drawing, the multifilament yarn to be drawn is drawn at a first speed fed to the main stretching zone and withdrawn from there at a second speed from the main stretching zone, the second speed in the known device being up to about 60% higher than the first speed, so that a corresponding tensile stress is exerted on the multifilament yarn. A further increase in the take-off speed is not possible in the known device, since otherwise breaks in individual filaments occur, which lead to permanent damage to the drawn multifilament yarn.

Ein Verfahren mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ist aus der EP-A 0 119 044 bekannt. Hierbei wird bei dem bekannten Verstreckungsverfahren unter anderem auch ein vororientiertes Multifilamentgarn (POY-Garn) als Ausgangsmaterial eingesetzt, das ausschließlich in einer Hauptstreckzone, bestehend aus einer vom Garn umschlungenen Liefergalette und einer vom Garn umschlungenen Abzugsgalette, verstreckt wird. Ausdrücklich weist die EP-A 0 119 044 darauf hin, daß bei dem bekannten Verfahren das Verstreckverhältnis zwischen 1:1,45 und 1:1,6 variiert, wobei die bekannte Verstreckung des vororientierten Multifilamentgarnes (POY-Garn) ausschließlich in der Kälte durchgeführt wird, um so bei der nach der Verstreckung durchgeführten thermischen Behandlung einen hohen Schrumpf auszulösen.A method with the features of the preamble of claim 1 is known from EP-A 0 119 044. In the known drawing process, a pre-oriented multifilament yarn (POY yarn) is used as the starting material, which is drawn exclusively in a main stretching zone consisting of a delivery godet wrapped in the yarn and a take-off godet wrapped in the yarn. EP-A 0 119 044 expressly points out that in the known method the draw ratio varies between 1: 1.45 and 1: 1.6, the known drawing of the pre-oriented multifilament yarn (POY yarn) being carried out exclusively in the cold in order to trigger a high shrinkage in the thermal treatment carried out after stretching.

Bei dem zuvor beschriebenen bekannten Verfahren besteht jedoch immer die Gefahr, daß bei dem Kaltverstrecken des POY-Garnes Filamentbrüche auftreten.With the known method described above, however, there is always the risk that filament breaks occur during the cold drawing of the POY yarn.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Verstrecken eines Multifilamentgarnes zur Verfügung zu stellen, bei dem auch bei höheren Abzugsgeschwindigkeiten (zweite Geschwindigkeit) keine Filamentbrüche auftreten.The present invention has for its object to provide a method for drawing a multifilament yarn in which no filament breaks occur even at higher take-off speeds (second speed).

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by a method having the characterizing features of patent claim 1.

Bei dem erfindungsgemäßen Verfahren zum Verstrecken eines vororientierten Multifilamentgarnes (POY-Garn) wird das zu verstreckende Multifilamentgarn über eine vom Garn umschlungene Liefergalette mit einer ersten Geschwindigkeit der Hauptstreckzone zugeführt und über eine vom Garn umschlungene Abzugsgalette mit einer zweiten Geschwindigkeit aus der Hauptstreckzone abgezogen. Hierbei ist, wie beim vorstehend beschriebenen Stand der Technik, die zweite Geschwindigkeit größer als die erste Geschwindigkeit. Die eigentliche Verstreckung in der Hauptstreckzone wird ausschließlich zwischen der Liefergalette und der Abzugsgalette durchgeführt, d.h. der beim Stand der Technik teilweise erforderliche beheizte Streckstift ist bei dem erfindungsgemäßen Verfahren nicht vorgesehen. Die Abzugsgalette wird bei dem erfindungsgemäßen Verfahren auf eine Temperatur zwischen 160 °C und 240 °C aufgeheizt, wobei man die erste und zweite Geschwindigkeit derart aufeinander abstimmt, daß die zweite Geschwindigkeit 70 % bis 180 % größer ist als die erste Geschwindigkeit. Hierdurch wird erreicht, daß das zu verstreckende vororientierte Multifilamentgarn (POY-Garn) somit mit einem Verstreckungsgrad von 1:1,7 bis 1:2,8 bei dem erfindungsgemäßen Verfahren verstreckt wird.In the method according to the invention for drawing a pre-oriented multifilament yarn (POY yarn), the multifilament yarn to be drawn is fed at a first speed to the main stretching zone via a delivery godet wrapped in the yarn and drawn off from the main stretching zone at a second speed via a take-off godet wrapped around the yarn. Here, as in the prior art described above, the second speed is greater than the first speed. The real stretching in the main stretching zone, only the delivery godet and the take-off godet are carried out, ie the heated stretching pin, which is sometimes required in the prior art, is not provided in the method according to the invention. In the process according to the invention, the take-off godet is heated to a temperature between 160 ° C. and 240 ° C., the first and second speeds being matched to one another in such a way that the second speed is 70% to 180% greater than the first speed. This ensures that the pre-oriented multifilament yarn (POY yarn) to be drawn is thus drawn with a draw ratio of 1: 1.7 to 1: 2.8 in the process according to the invention.

Überraschend konnte festgestellt werden, daß sich nach dem erfindungsgemäßen Verfahren die POY-Garne, insbesondere Polyester-POY-Garne, einwandfrei verstrecken lassen, ohne daß hierbei selbst bei den zuvor genannten hohen Verstreckungsgraden von 1:1,7 bis 1:2,8 Filamentbrüche auftreten. Dies wird bei dem erfindungsgemäßen Verfahren darauf zurückgeführt, daß hier bewußt auf den bekannten geheizten Streckstift in der Hauptstreckzone oder das bekannte Kaltverstrecken verzichtet wird. Auch weisen die derart verstreckten Multifilamentgarne erstaunlicherweise relativ geringe Schrumpfwerte, insbesondere Kochschrumpfwerte (Wasser 98 °C) von unter 1 % und Heißluftschrumpfwerte bei 160° kleiner als 1,5 %, auf. Desweiteren konnte festgestellt werden, daß die nach dem erfindungsgemäßen Verfahren verstreckten Multifilamentgarne eine Reißfestigkeit besitzen, die zwischen 20 % und 80 % über den Reißfestigkeiten liegen, die bei identischen Ausgangsmaterialien durch Anwendung des zuvor beschriebenen konventionellen Verfahrens erzielt werden können.Surprisingly, it was found that the POY yarns, in particular polyester POY yarns, can be drawn without problems by the process according to the invention, without filament breaks even at the aforementioned high degrees of drawing of 1: 1.7 to 1: 2.8 occur. In the method according to the invention, this is attributed to the fact that the known heated stretching pin in the main stretching zone or the known cold stretching are deliberately dispensed with here. The multifilament yarns drawn in this way also surprisingly have relatively low shrinkage values, in particular boil-off shrinkage values (water 98 ° C.) of less than 1% and hot air shrinkage values at 160 ° C. less than 1.5%. Furthermore, it was found that the multifilament yarns drawn by the process according to the invention have a tensile strength which is between 20% and 80% higher than the tensile strengths with identical starting materials can be achieved by using the conventional method described above.

Eine erste, besonders geeignete Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß hier die erste und zweite Geschwindigkeit derart aufeinander abgestimmt werden, daß die zweite Geschwindigkeit 100 % bis 160 % größer ist als die erste Geschwindigkeit. Dies bedeutet, daß bei dieser Ausführungsform des erfindungsgemäßen Verfahrens Verstreckungsgrade angewendet werden, die zwischen 1:2 und 1:2,6 variieren. Die so verstreckten Multifilamentgarne, bei denen es sich vorzugsweise um Polyestermultifilamentgarne handelt, zeichnen sich durch noch geringere Schrumpfwerte, insbesondere durch Kochschrumpfwerte (Wasser 98°C) von kleiner 0,8 % und Heißschrumpfwerte (160 °C) von kleiner als 1,2 %, aus. Auch sind die Reißfestigkeiten der derart verstreckten Multifilamentgarne im Vergleich zu herkömmlich verstreckten Multifilamentgarnen um etwa 60 % bis 80 % höher.A first, particularly suitable embodiment of the method according to the invention provides that here the first and second speeds are coordinated with one another in such a way that the second speed is 100% to 160% greater than the first speed. This means that in this embodiment of the process according to the invention, degrees of stretching are used which vary between 1: 2 and 1: 2.6. The multifilament yarns stretched in this way, which are preferably polyester multifilament yarns, are distinguished by even lower shrinkage values, in particular by boiling shrinkage values (water 98 ° C.) of less than 0.8% and heat shrinkage values (160 ° C.) of less than 1.2%. , out. The tensile strengths of the multifilament yarns drawn in this way are also higher by approximately 60% to 80% compared to conventionally drawn multifilament yarns.

Eine andere Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß man auch die Liefergalette auf eine Temperatur zwischen 60 °C und 160 °C, vorzugsweise auf eine Temperatur zwischen 80 °C bis 140 °C, aufheizt.Another embodiment of the process according to the invention provides that the delivery godet is also heated to a temperature between 60 ° C. and 160 ° C., preferably to a temperature between 80 ° C. and 140 ° C.

Eine weitere Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß man in der Hauptstreckzone, d.h. somit zwischen der Liefergalette und der Abzugsgalette, das zu verstreckende Multifilamentgarn auf eine Temperatur zwischen 80 °C und 180 °C aufheizt. Hierbei wird diese Aufheizung des zu verstreckenden Multifilamentgarnes in der Hauptstreckzone derart durchgeführt, daß man zu diesem Zweck insbesondere eine hot plate, einen IR-Strahler und/oder einen Laser verwendet.A further embodiment of the method according to the invention provides that the multifilament yarn to be drawn is heated to a temperature between 80 ° C. and 180 ° C. in the main drawing zone, ie between the delivery godet and the take-off godet. This will heat up the stretched Multifilament yarns carried out in the main stretching zone in such a way that a hot plate, an IR radiator and / or a laser are used for this purpose.

Bezüglich der Zeit, bei der man das Multifilamentgarn in der Hauptstreckzone aufheizt und bei den zuvor genannten Temperaturen (80 °C bis 180 °C) verweilen läßt, ist festzuhalten, daß diese Verweilzeit insbesondere zwischen 0,01 s und 1 s variiert.Regarding the time at which the multifilament yarn is heated in the main stretching zone and allowed to remain at the aforementioned temperatures (80 ° C. to 180 ° C.), it should be noted that this residence time varies in particular between 0.01 s and 1 s.

Um bei dem erfindungsgemäßen Verfahren die für die Verstreckung in der Hauptstreckzone erforderlichen Klemmpunkte zu erhalten, werden, wie bereits vorstehend beschrieben ist, die Liefergalette und die Abzugsgalette mit dem zu verstreckenden Multifilamentgarn umschlungen. Hier hat es sich gezeigt, daß insbesondere dann besondere hohe Festigkeiten und besonders geringe Schrumpfwerte resultieren, wenn die Liefergalette und/oder die Abzugsgalette mit dem zu verstreckenden Multifilamentgarn 5 - 40mal, vorzugsweise 10 - 20mal, umschlungen wird. Diese Umschlingungswerte beziehen sich auf Galetten, deren Durchmesser zwischen etwa 40 mm und 250 mm, vorzugsweise 80 mm und 120 mm, variieren.In order to obtain the clamping points required for drawing in the main drawing zone in the method according to the invention, the delivery godet and the take-off godet are looped around with the multifilament yarn to be drawn, as already described above. It has been shown here that particularly high strengths and particularly low shrinkage values result when the delivery godet and / or the take-off godet is wrapped 5 to 40 times, preferably 10 to 20 times, with the multifilament yarn to be drawn. These wrapping values relate to godets whose diameters vary between approximately 40 mm and 250 mm, preferably 80 mm and 120 mm.

Eine andere, besonders geeignete Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß man in Transportrichtung des zu verstreckenden Multifilamentgarnes gesehen vor der Hauptstreckzone eine Vorverstreckungszone anordnet. Mit anderen Worten wird hierbei somit das zu verstreckende Multifilamentgarn (POY-Garn) zunächst in der Vorverstreckungszone teilweise verstreckt und anschließend in der Hauptstreckzone endverstreckt.Another, particularly suitable embodiment of the method according to the invention provides that, seen in the direction of transport of the multifilament yarn to be drawn, a pre-drawing zone is arranged in front of the main drawing zone. In other words, the multifilament yarn (POY yarn) to be drawn is first partially in the pre-drawing zone stretched and then finally stretched in the main stretching zone.

Bei der zuvor beschriebenen Ausführungsvariante des erfindungsgemäßen Verfahrens bietet es sich an, das Multifilamentgarn in der Vorverstreckungszone zwischen 0,5 % und 10 %, vorzugsweise zwischen 1 % und 4 %, vorzuverstrecken, d.h. das Multifilamentgarn wird somit in der Vorverstreckungszone zwischen 0,5 % und 10 %, vorzugsweise zwischen 1 % und 4 %, gelängt.In the embodiment variant of the method according to the invention described above, it is advisable to pre-stretch the multifilament yarn in the pre-stretching zone between 0.5% and 10%, preferably between 1% and 4%. the multifilament yarn is thus stretched in the pre-stretching zone between 0.5% and 10%, preferably between 1% and 4%.

Bezüglich der Vorverstreckungs- bzw. Verstreckungsgeschwindigkeiten ist festzuhalten, daß man dann besonders wirtschaftlich und reproduzierbar die zuvor genannten hohen Festigkeiten und geringen Schrumpfwerte erzielt, wenn man Abzugsgeschwindigkeiten auswählt, die vorzugsweise zwischen 600 m/min und 1.200 m/min liegen.Regarding the pre-stretching or stretching speeds, it should be noted that the aforementioned high strengths and low shrinkage values can be achieved particularly economically and reproducibly if one selects take-off speeds that are preferably between 600 m / min and 1,200 m / min.

Um durch das erfindungsgemäße Verstreckungsverfahren ein besonders schrumpfarmes und verstrecktes Garn zu erzeugen, sieht eine andere, besonders geeignete Ausführungsform des erfindungsgemäßen Verfahrens vor, daß in Transportrichtung des Multifilamentgarnes gesehen hinter der Hauptstreckzone eine Relaxierzone angeordnet ist, in der das verstreckte Multifilamentgarn auf eine Temperatur zwischen 80 °C und 240 °C, vorzugsweise auf eine Temperatur zwischen 140 °C und 200 °C, erwärmt wird. Hier hat sich gezeigt, daß eine derartige Relaxierzone die zuvor genannten Schrumpfwerte des verstreckten Multifilamentgarnes weiter um etwa 20 % bis etwa 40 % reduziert, insbesondere dann, wenn man das verstreckte Multifilamentgarn in die Relaxierzone mit Voreilung, die vorzugsweise zwischen 0,5 % und 10 % und insbesondere zwischen 1 % und 3 % liegt, einführt. Die Verweilzeit des Multifilamentgarnes in der Relaxierzone variiert dann abhängig von der jeweiligen Transportgeschwindigkeit des Garnes durch die Relaxierzone und beträgt vorzugsweise 0,01 s bis 1 s.In order to produce a particularly low-shrinkage and drawn yarn by the drawing process according to the invention, another, particularly suitable embodiment of the process according to the invention provides that, viewed in the transport direction of the multifilament yarn, a relaxation zone is arranged behind the main drawing zone, in which the drawn multifilament yarn is heated to a temperature between 80 ° C and 240 ° C, preferably to a temperature between 140 ° C and 200 ° C, is heated. It has been shown here that such a relaxation zone further reduces the aforementioned shrinkage values of the drawn multifilament yarn by about 20% to about 40%, in particular when the drawn multifilament yarn is introduced into the relaxation zone with lead, which is preferably between 0.5% and 10% and in particular between 1% and 3%. The residence time of the multifilament yarn in the relaxation zone then varies depending on the respective transport speed of the yarn through the relaxation zone and is preferably 0.01 s to 1 s.

Die Auswahl des nach dem erfindungsgemäßen Verfahrens zu verstreckenden Multifilamentgarnes (POY-Garn) richtet sich nach der späteren Verwendung dieses verstreckten Garnes. Wird beispielsweise das verstreckte Garn später zu einem Nähgarn verarbeitet, so empfiehlt es sich, hier ein solches POY-Multifilamentgarn auszuwählen, dessen Einzelfilamenttiter als Ausgangsmaterial zwischen 1 dtex und 12 dtex, vorzugsweise zwischen 1,5 dtex und 4 dtex, variiert.The selection of the multifilament yarn (POY yarn) to be drawn by the method according to the invention is based on the later use of this drawn yarn. If, for example, the drawn yarn is later processed into a sewing thread, it is advisable to select such a POY multifilament thread whose single-filament titer as the starting material varies between 1 dtex and 12 dtex, preferably between 1.5 dtex and 4 dtex.

Auch der Gesamttiter des jeweils zu verstreckenden POY-Garnes richtet sich nach der späteren Verwendung des verstreckten Garnes. Für einen Einsatz des verstreckten Garnes zur Herstellung eines Nähgarnes variiert dieser Gesamttiter des zu verstreckenden Garnes zwischen 40 dtex und 2.000 dtex, vorzugsweise zwischen 80 dtex und 1.200 dtex.The total titer of the POY yarn to be drawn in each case also depends on the later use of the drawn yarn. For use of the drawn yarn to produce a sewing thread, this total titer of the yarn to be drawn varies between 40 dtex and 2,000 dtex, preferably between 80 dtex and 1,200 dtex.

Soll das erfindungsgemäß verstreckte Multifilamentgarn zu einem Nähgarn verarbeitet werden, so wird hierfür ein POY-Garn eingesetzt, das eine Elementarfadenzahl zwischen 16 und 300, vorzugsweise zwischen 24 und 96, besitzt.If the multifilament yarn stretched according to the invention is to be processed into a sewing thread, a POY yarn is used for this which has a number of filaments between 16 and 300, preferably between 24 and 96.

Eine besonders geeignete Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß das zu verstreckende vororientierte Multifilamentgarn ein Polyester-POY-Garn ist, wie dies bereits vorstehend mehrfach erwähnt wurde. Insbesondere wird als Ausgangsmaterial ein Polyester-POY-Garn eingesetzt, dessen Intrinsic-Viskosität zwischen 0,5 dl/g und 0,75 dl/g, vorzugsweise zwischen 0,55 dl/g und 0,63 dl/g, liegt. Hierbei handelt es sich somit um ein solches Polyester-POY-Garn, das in seinem molekularen Aufbau, insbesondere in seinem Molekulargewicht und seine chemischen Zusammensetzung, einem üblichen textilen Standard-Multifilamentgarn entspricht. Die zuvor genannten Intrinsic-Viskositäten stellen solche Werte dar, die von entsprechenden Lösungen des Polymeren in Dichloressigsäure bei 25 °C gemessen sind. Somit lassen sich durch Anwendung des erfindungsgemäßen Verfahrens aus einem textilen Standard-Multifilamentgarn hochfeste Multifilamentgarne machen, ohne daß es dabei wie beim derzeitigen Stand der Technik erforderlich ist, hier beispielsweise die Molekulargewichte des Polymeren zu erhöhen oder die Monomeren zu variieren.A particularly suitable embodiment of the method according to the invention provides that the pre-oriented multifilament yarn to be drawn is a polyester POY yarn, as has already been mentioned several times above. In particular, a polyester POY yarn is used as the starting material, the intrinsic viscosity of which is between 0.5 dl / g and 0.75 dl / g, preferably between 0.55 dl / g and 0.63 dl / g. This is therefore a polyester POY yarn of this type which corresponds in its molecular structure, in particular in its molecular weight and its chemical composition, to a conventional textile standard multifilament yarn. The aforementioned intrinsic viscosities represent values which are measured from corresponding solutions of the polymer in dichloroacetic acid at 25 ° C. Thus, by using the method according to the invention, high-strength multifilament yarns can be made from a textile standard multifilament yarn without it being necessary, as in the current state of the art, for example to increase the molecular weights of the polymer or to vary the monomers.

Wie bereits vorstehend dargelegt ist, kann das erfindungsgemäße Verfahren insbesondere auch eingesetzt werden, um Vorprodukte für die Herstellung von Nähgarnen zu erstellen. So ist es beispielsweise möglich, zwei oder mehrere, vorzugsweise zwei bis vier, nach dem erfindungsgemäßen Verfahren verstreckte Multifilamentgarne zu einem Nähgarnzwirn zu verzwirnen, wie dies in der DE-A-4 215 016 beschrieben ist. Desweiteren kann auch das erfindungsgemäß verstreckte Multifilamentgarn als Seelenmaterial in einem Coregarn verarbeitet werden, wobei dann dieses Coregarn selbst oder zwei bis vier Coregarne ein Nähgarn ausbilden, wie dies in der DE-A-4 215 212 detailliert beschrieben ist.As already explained above, the method according to the invention can in particular also be used to produce preliminary products for the production of sewing threads. For example, it is possible to twist two or more, preferably two to four, multifilament yarns drawn by the method according to the invention to form a sewing thread, as described in DE-A-4 215 016. Furthermore can also the multifilament yarn stretched according to the invention is processed as core material in a core yarn, in which case this core yarn itself or two to four core yarns form a sewing yarn, as is described in detail in DE-A-4 215 212.

Eine besonders geeignete Weiterbildung des zuvor beschriebenen erfindungsgemäßen Verfahrens, die insbesondere zur Herstellung von Nähgarnen dient, sieht vor, daß man nach der Verstreckung das verstreckte Multifilamentgarn mit mindestens einem zweiten Multifilamentgarn unter Ausbildung eines mit Schlaufen und Schlingen versehenen Garnes in einem turbulenten Fluidstrom, insbesondere einem Gasstrom, verwirbelt. Bei dieser Ausführungsform des erfindungsgemäßen Verfahrens entsteht somit ein verwirbeltes Kern-Mantel-Garn, wobei im Kern (Seele) das nach dem erfindungsgemäßen Verfahren verstreckte Multifilamentgarn angeordnet ist, während der Mantel (Effektmaterial) von dem mindestens einen zweiten Multifilamentgarn gebildet wird. Ein derartiges Nähgarn, das vorzugsweise aus Polyestermultifilamenten besteht, weist dann als Fertigprodukt Festigkeiten auf, die vorzugsweise zwischen 40 cN/tex und 60 cN/tex liegen, wobei der Restschrumpf des Fertiggarnes vorzugsweise kleiner als 2 % (Thermoschrumpf 160 °C) bzw. kleiner als 1,2 % (Kochschrumpf Wasser 98 °C) beträgt. Wie anhand von Nähversuchen festgestellt werden konnte, besitzt ein derartiges verwirbeltes Nähgarn ein ausgezeichnetes Nähverhalten, was dadurch zum Ausdruck kommt, daß es bei extrem schwierigen Nähoperationen, so zum Beispiel beim multidirektionalen Nähen mit bis zu 7.000 Stichen pro Minute oder beim Knopflochnähen, nicht reißt oder beim Vernähen andersartige Störungen hervorruft. Desweiteren läßt sich ein derartiges Nähgarn auch hervorragend bezüglich Farbton und Farbegalität anfärben, was darauf zurückgeführt wird, daß dieses Nähgarn als Seelenmaterial ein zwar speziell verstrecktes Multifilamentgarn aufweist, das aber ansonsten in seinem molekularen Aufbau einer textilen Standardfaser entspricht.A particularly suitable development of the method according to the invention described above, which is used in particular for the production of sewing threads, provides that after the stretching, the stretched multifilament thread with at least one second multifilament thread with formation of a thread provided with loops and loops in a turbulent fluid stream, in particular one Gas flow, swirled. In this embodiment of the method according to the invention, a swirled core-sheath yarn thus arises, the multifilament yarn drawn by the method according to the invention being arranged in the core (core), while the sheath (effect material) is formed by the at least one second multifilament yarn. Such a sewing thread, which preferably consists of polyester multifilaments, then has strengths as the finished product, which are preferably between 40 cN / tex and 60 cN / tex, the residual shrinkage of the finished thread preferably being less than 2% (thermal shrinkage 160 ° C.) or less than 1.2% (boiling water shrinkage 98 ° C). As could be determined from sewing tests, such a swirled sewing thread has an excellent sewing behavior, which is expressed by the fact that it is extremely difficult Sewing operations, such as multidirectional sewing at up to 7,000 stitches per minute or buttonhole sewing, do not tear or cause other disruptions when sewing. Furthermore, such a sewing thread can also be excellently dyed in terms of color and color uniformity, which is attributed to the fact that this sewing thread has a specially stretched multifilament thread as the core material, but otherwise corresponds in its molecular structure to a standard textile fiber.

Um bei der zuvor beschriebenen Ausführungsvariante des erfindungsgemäßen Verfahrens zu erreichen, daß das verwirbelte Garn, das vorzugsweise als Nähgarn eingesetzt wird, einen einwandfreien Fadenschluß besitzt, führt man bei einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens das verstreckte Multifilamentgarn mit einer Voreilung zwischen 1 % und 7 % und das zweite, das Effektmaterial bildende Multifilamentgarn mit einer Voreilung zwischen 15 % und 45 % der Verwirbelung zu.In order to achieve in the embodiment variant of the method according to the invention described above that the intermingled yarn, which is preferably used as sewing thread, has a perfect thread closure, in a further embodiment of the method according to the invention the drawn multifilament yarn is led with a lead of between 1% and 7% and the second multifilament yarn forming the effect material with an advance of between 15% and 45% of the intermingling.

Benetzt man zudem das verstreckte Multifilamentgarn vor dem Verwirbeln mit Wasser oder einer wäßrigen Dispersion, so bewirkt dies, daß das Kernmaterial besonders intensiv mit dem Effektmaterial vermischt ist, so daß hierdurch ebenfalls eine Erhöhung des Fadenschlusses resultiert.If the stretched multifilament yarn is also wetted with water or an aqueous dispersion before intermingling, this causes the core material to be mixed particularly intensively with the effect material, so that this also results in an increase in thread closure.

Bezüglich des Titers und der Elementarfadenzahl des zweiten Multifilamentgarnes ist festzuhalten, daß bei dem erfindungsgemäßen Verfahren für das zweite Multifilamentgarn ein solches Material ausgewählt wird, dessen Titer 15 % bis 40 % und dessen Elementarfadenzahl 30 % bis 250 %, jeweils bezogen auf den Titer bzw. die Elementarfadenzahl des den Kern (erste Garnkomponente) des Kern-Mantel-Garnes bildenden Multifilamentgarnes betragen.With regard to the titer and the number of filaments of the second multifilament yarn, it should be noted that in the method according to the invention, such for the second multifilament yarn Material is selected whose titer is 15% to 40% and whose number of filaments is 30% to 250%, in each case based on the titer or the number of filaments of the multifilament yarn forming the core (first yarn component) of the core-sheath yarn.

Um das zuvor angesprochene Anfärbeverhalten des verwirbelten Kern-Mantel-Garnes weiter zu verbessern, sieht eine andere Ausführungsform des erfindungsgemäßen Verfahrens vor, daß man als zweites Multifilamentgarn ebenfalls ein vororientiertes Multifilamentgarn (POY-Garn) verwendet. Hierbei kann dieses vororientierte Multifilamentgarn, das ebenso wie das als Kern eingesetzte verstreckte Multifilamentgarn aus Polyester besteht, entweder nach dem eingangs beim Stand der Technik beschriebenen herkömmlichen Verfahren verstreckt werden oder vorzugsweise ebenso verstreckt werden, wie dies vorstehend bei den verschiedenen Ausführungsformen des erfindungsgemäßen Verfahrens ausführlich beschrieben ist. Konkret bedeutet dies, daß das multifile Effektmaterial dann im einfachsten Fall in der zuvor bereits beim erfindungsgemäßen Verfahren beschriebenen Hauptstreckzone zwischen der Liefergalette und der Abzugsgalette verstreckt ist, ohne daß in dieser Hauptstreckzone ein Streckstift angeordnet ist. Desweiteren wird dann bei der Verstreckung des multifilen Effektmaterials die Abzugsgalette auf eine Temperatur zwischen 160 °C und 240 °C aufgeheizt, wobei die erste Geschwindigkeit (Zuführgeschwindigkeit) und die zweite Geschwindigkeit derart aufeinander abgestimmt sind, daß die zweite Geschwindigkeit 70 % bis 180 % größer ist als die erste Geschwindigkeit.In order to further improve the previously mentioned dyeing behavior of the intermingled core-sheath yarn, another embodiment of the method according to the invention provides that a pre-oriented multifilament yarn (POY yarn) is also used as the second multifilament yarn. This pre-oriented multifilament yarn, which, like the stretched multifilament yarn used as the core, consists of polyester, can either be drawn according to the conventional method described at the beginning of the prior art, or preferably also drawn as described in detail above in the various embodiments of the method according to the invention is. Specifically, this means that in the simplest case the multifilament effect material is then stretched between the delivery godet and the take-off godet in the main stretching zone already described in the process according to the invention, without a stretching pin being arranged in this main stretching zone. Furthermore, the draw-off godet is then heated to a temperature between 160 ° C. and 240 ° C. when the multifilament effect material is stretched, the first speed (feed speed) and the second speed being matched to one another such that the second speed is 70% to 180% greater is as the first speed.

Ebenso bietet es sich an, das zweite Multifilamentgarn (Effektmaterial) derart zu verstrecken, daß die zweite Geschwindigkeit zwischen 100 % und 160 % größer ist als die erste Geschwindigkeit.It also makes sense to stretch the second multifilament yarn (effect material) in such a way that the second speed is between 100% and 160% greater than the first speed.

Die eingangs beim erfindungsgemäßen Verfahren beschriebenen Varianten, die sich auf den Temperaturbereich der Liefergalette, auf das Aufheizen des Multifilamentgarnes in der Hauptstreckzone, auf die Zeiten beim Aufheizen, auf die Umschlingung der Liefergalette und/oder der Abzugsgalette, auf die Anordnung einer Vorverstreckungszone, auf die Voreilung in der Vorverstreckungszone, auf die Verstreckungsgeschwindigkeit, auf die Anordnung einer Relaxierzone, auf die Voreilung in der Relaxierzone und auf die Auswahl der Intrinsic-Viskosität des eingesetzten Garnes, beziehen, können auch für die Verstreckung des zweiten Multifilamentgarnes (Effektgarnes) identisch angewendet werden, so daß zur Vermeidung von Wiederholungen auf die zuvor detailliert beschriebenen Ausführungsvarianten verwiesen wird.The variants described at the beginning of the process according to the invention, which relate to the temperature range of the delivery godet, to the heating of the multifilament yarn in the main stretching zone, to the times during heating, to the wrapping of the delivery godet and / or the take-off godet, to the arrangement of a pre-stretching zone, to the Leading in the pre-drawing zone, the drawing speed, the arrangement of a relaxation zone, the leading in the relaxation zone and the selection of the intrinsic viscosity of the yarn used can also be used identically for the drawing of the second multifilament yarn (fancy yarn), so that in order to avoid repetition, reference is made to the design variants described in detail above.

Bei einer geeigneten Ausführungsform des erfindungsgemäßen Verfahrens werden das den Kern des Kern-Mantel-Garnes bildende Multifilamentgarn und das den Mantel des Kern-Mantel-Garnes bildendes Multifilamentgarn identisch verstreckt, so daß das entsprechend hieraus hergestellte verwirbelte Kern-Mantel-Garn sich insbesondere dadurch auszeichnet, daß es sich sowohl vom Farbton als auch von der Farbtiefe identisch anfärbt.In a suitable embodiment of the method according to the invention, the multifilament yarn forming the core of the core-sheath yarn and the multifilament yarn forming the sheath of the core-sheath yarn are drawn identically, so that the intermingled core-sheath yarn produced therefrom is characterized in particular by this that it stains identically both from the hue and from the depth of color.

Eine weitere, besonders geeignete Ausführungsform des erfindungsgemäßen Verfahrens sieht vor, daß man ein bis vier, den Kern des verwirbelten Kern-Mantel-Garnes ausbildende und nach den eingangs beschriebenen Verstreckungsverfahren verstreckte Multifilamentgarne mit ein bis vier, die Mantelkomponente des verwirbelten Kern-Mantel-Garnes ausbildendes Multifilamentgarn bzw. ausbildende Garne verwirbelt. Hier resultieren dann solche verwirbelten Kern-Mantel-Garne, die sich durch eine extrem hohe Festigkeit auszeichnen, daß sie insbesondere als Nähgarne verwendet werden, wobei derartige Nähgarne vorzugsweise aus Polyestermultifilamenten bestehen.A further, particularly suitable embodiment of the method according to the invention provides that one to four multifilament yarns forming the core of the intermingled core-sheath yarn and drawn according to the stretching methods described at the beginning with one to four, the sheath component of the intermingled core-sheath yarn forming multifilament yarn or forming yarn swirled. This results in such swirled core-sheath yarns, which are characterized by an extremely high strength, that they are used in particular as sewing threads, such sewing threads preferably consisting of polyester multifilaments.

Um den Fadenschluß des verwirbelten Kern-Mantel-Garnes zu erhöhen, sieht eine Weiterbildung der zuvor beschriebenen Verfahrensvarianten vor, daß das verwirbelte Kern-Mantel-Garn nach der Verwirbelung mit einer Drehung zwischen 10 Drehungen pro Meter und 1.000 Drehungen pro Meter, vorzugsweise zwischen 100 Drehungen pro Meter und 600 Drehungen pro Meter, versehen wird.In order to increase the thread closure of the intermingled core-sheath yarn, a development of the previously described method variants provides that the intermingled core-sheath yarn after the intermingling with a twist of between 10 turns per meter and 1,000 turns per meter, preferably between 100 Turns per meter and 600 turns per meter.

Um den Fadenschluß weiter zu verbessern, sieht eine weitere Ausführungsvariante des erfindungsgemäßen Verfahrens vor, daß das verwirbelte Kern-Mantel-Garn einer Spannungsbehandlung unterworfen wird, so daß die beim Verwirbeln gebildeten, sich selbst kreuzenden Schlingen bzw. Schlaufen soweit verkleinert werden, daß sie in ihrem Durchmesser um etwa 20 % bis etwa 95 %, bezogen auf ihren ursprünglichen Durchmesser, verringert werden. Hierdurch wird das Volumen des verwirbelten Garnes entsprechend verkleinert, so daß dementsprechend ein derartiges Garn eine verringerte Anzahl von abstehenden Schlingen und Schlaufen aufweist, so daß ein Verhaken dieser Schlingen und Schlaufen bei der Verarbeitung und insbesondere beim Einsatz eines derartigen Garnes als Nähgarn, verhindert wird.In order to further improve the thread closure, a further embodiment variant of the method according to the invention provides that the intermingled core-sheath yarn is subjected to a tension treatment so that the self-intersecting loops or loops formed during intermingling are reduced to such an extent that they become their diameter can be reduced by about 20% to about 95% of their original diameter. As a result, the volume of the intermingled yarn is reduced accordingly, so that such a Yarn has a reduced number of protruding loops and loops, so that these loops and loops get caught in the processing and in particular when such a yarn is used as a sewing thread.

Um die zuvor beschriebene Spannungsbehandlung durchzuführen, wird das verwirbelte Kern-Mantel-Garn der Spannungsbehandlung mit einer Geschwindigkeit zugeführt, die zwischen 0,1 % und 5 %, vorzugsweise zwischen 0,1 % und 2,5 %, geringer ist als die Geschwindigkeit, mit der das verwirbelte Garn aus der Spannungsbehandlung abgezogen wird.In order to carry out the tension treatment described above, the intermingled core-jacket yarn is fed to the tension treatment at a rate which is between 0.1% and 5%, preferably between 0.1% and 2.5%, less than the rate, with which the interlaced yarn is withdrawn from the tension treatment.

Ebenso kann man die zuvor beschriebene Verkleinerung der Durchmesser der Schlaufen bzw. Schlingen beim verwirbelten Garn dadurch erreichen, daß man das verwirbelte Kern-Mantel-Garn einer thermischen Behandlung bei einer Temperatur zwischen 100 °C und 250 °C, insbesondere zwischen 180 °C und 240 °C, unterwirft. Hierbei wird diese thermische Behandlung vorzugsweise in einem Heißluftstrom durchgeführt, wobei die Zeiten der thermischen Behandlung insbesondere zwischen 0,01 s und 10 s, vorzugsweise zwischen 0,05 s und 1 s, variieren. Eine derartige thermische Behandlung dient gleichzeitig zur Reduzierung der Schrumpfwerte (Kochschrumpf - Wasser, Heißluftschrumpf) des verwirbelten Kern-Mantel-Garnes.Likewise, the reduction in the diameter of the loops or loops of the entangled yarn described above can be achieved by subjecting the entangled core-jacket yarn to thermal treatment at a temperature between 100 ° C. and 250 ° C., in particular between 180 ° C. and 240 ° C, subject. This thermal treatment is preferably carried out in a hot air stream, the times of the thermal treatment varying in particular between 0.01 s and 10 s, preferably between 0.05 s and 1 s. Such thermal treatment also serves to reduce the shrinkage values (cooking shrinkage - water, hot air shrinkage) of the intermingled core-sheath yarn.

Um bei der zuvor beschriebenen thermischen Behandlung noch eine Relaxierung des verwirbelten Kern-Mantel-Garnes zu erreichen, sieht eine andere Ausführungsform des erfindungsgemäßen Verfahrens vor, daß man das verwirbelte Garn der thermischen Behandlung mit einer Geschwindigkeit zuführt, die höher ist als die Geschwindigkeit, mit der man das Kern-Mantel-Garn aus der thermischen Behandlung abzieht. Vorzugsweise wird das Kern-Mantel-Garn der thermischen Behandlung mit einer Geschwindigkeit zugeführt, die 0,5 % bis 10 %, insbesondere 1 % bis 3 %, höher ist als die Abzugsgeschwindigkeit des Kern-Mantel-Garnes aus der thermischen Behandlung. Somit kann bei der thermischen Behandlung das Kern-Mantel-Garn frei schrumpfen, was sich wiederum äußerst positiv im Restschrumpf des entsprechend behandelten Kern-Mantel-Garnes ausdrückt.In order to achieve a relaxation of the intermingled core-sheath yarn in the previously described thermal treatment, another embodiment of the method according to the invention provides that the intermingled yarn of the thermal Treatment at a rate higher than the rate at which the core-sheath yarn is removed from the thermal treatment. The core-sheath yarn is preferably fed to the thermal treatment at a speed which is 0.5% to 10%, in particular 1% to 3%, higher than the withdrawal speed of the core-sheath yarn from the thermal treatment. Thus, the core-sheath yarn can shrink freely during the thermal treatment, which in turn is expressed extremely positively in the residual shrinkage of the correspondingly treated core-sheath yarn.

Besonders gute Ergebnisse bezüglich des Nähverhaltens weist ein nach dem erfindungsgemäßen Verfahren hergestelltes Kern-Mantel-Garn auf, dessen Haarigkeit (sh) zwischen 3 und 6,5, insbesondere zwischen 4 und 5, variiert. Hierbei beziehen sich diese Werte der Haarigkeit auf Meßergebnisse, wie diese nach dem bekannten Verfahren mit einem Uster-Garngleichmäßigkeitsmeßgerät, Typ UT3, bestimmt werden.Particularly good results with regard to sewing behavior are obtained from a core-sheath yarn produced by the process according to the invention, the hairiness (sh) of which varies between 3 and 6.5, in particular between 4 and 5. These hairiness values relate to measurement results as determined by the known method with a Uster yarn uniformity measuring device, type UT3.

Wie dies bereits vorstehend mehrfach erwähnt ist, wird das erfindungsgemäße Verfahren vorzugsweise bei Polyester-Multifilamenten angewendet, wobei unter Polyester im Sinne der vorliegenden Anmeldung Polyethylenterephthalat verstanden wird.As has already been mentioned several times above, the method according to the invention is preferably used for polyester multifilaments, polyester being understood as meaning polyethylene terephthalate in the context of the present application.

Der im vorliegenden Text verwendete Begriff "POY-Garn" (partially oriented yarn oder pre-oriented yarn) umfaßt alle vororientierten polymeren Multifilamentgarne, die eine gewisse Vororientierung im Rahmen ihres Herstellungsprozesses erfahren haben, wobei diese molekulare Vororientierung in ihrer Größe jedoch nicht der molekularen Orientierung entspricht, die ein vollverstrecktes Multifilamentgarn aufweist.The term "POY yarn" (partially oriented yarn or pre-oriented yarn) used in the present text encompasses all pre-oriented polymeric multifilament yarns which have undergone a certain amount of pre-orientation in the course of their manufacturing process, but this size of the molecular pre-orientation does not correspond to the molecular orientation corresponds, which has a fully drawn multifilament yarn.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sind in den Unteransprüchen angegeben.Advantageous developments of the method according to the invention are specified in the subclaims.

Das erfindungsgemäße Verfahren wird nachfolgend anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung (Figur 1) näher erläutert.The method according to the invention is explained in more detail below using an exemplary embodiment in conjunction with the drawing (FIG. 1).

Auf einer in der Figur 1 schematisch gezeigten Anlage wurde ein mit K bezeichnetes Polyester-POY-Garn mit einem Ausgangstiter von 410 dtex und einer Filamentzahl von 40 verstreckt. Hierbei wies die Anlage eine Hauptstreckzone auf, die zwischen einer Liefergalette 1 und einer Abzugsgalette 2 ausgebildet ist. Das Multifilamentgarn K hatte die Liefergalette 1 und die Abzugsgalette 2 jeweils 20mal umschlungen. Die Zuführgeschwindigkeit des Garnes K zur Liefergalette und die Abzugsgeschwindigkeit des Garnes K von der Abzugsgalette 2 waren derart aufeinander abgestimmt, daß das POY-Garn K in der Hauptstreckzone mit einem Verstreckungsgrad von 1:2,35 verstreckt wurde. Vor der Hauptstreckzone, die aus den beiden Galetten 1 und 2 gebildet wurde, war eine Vorverstreckungszone angeordnet, die ein Lieferwerk 5 und die Liefergalette 1 umfaßte. Hierbei war die Geschwindigkeit des Lieferwerkes 5 derart auf die Geschwindigkeit der Liefergalette 1 angepaßt, daß in der Vorverstreckungszone das POY-Garn K um 5 % verstreckt wurde.A polyester POY yarn designated K with an initial titer of 410 dtex and a number of filaments of 40 was drawn on a system shown schematically in FIG. Here, the system had a main stretch zone, which is formed between a delivery godet 1 and a take-off godet 2. The multifilament yarn K had looped the delivery godet 1 and the take-off godet 2 20 times each. The feed speed of the yarn K to the delivery godet and the withdrawal speed of the yarn K from the withdrawal godet 2 were coordinated with one another in such a way that the POY yarn K was drawn in the main drawing zone with a drawing degree of 1: 2.35. Before the main stretching zone, which was formed from the two godets 1 and 2, a pre-stretching zone was arranged, which comprised a delivery unit 5 and the delivery godet 1. Here, the speed of the delivery unit 5 was adapted to the speed of the delivery godet 1 such that the POY yarn K was drawn by 5% in the pre-drawing zone.

Ein zweites Garn E wurde, wie das Garn K, von einem nicht gezeigten Cone einem Lieferwerk 6 zugeführt. Anschließend wurde das Garn zu einer Liefergalette 3 transportiert und von dort durch eine Abzugsgalette 4 abgezogen. Die Liefergalette 3 und die Abzugsgalette 4 bildeten die Hauptstreckzone für das Polyester-POY-Garn E aus. Hierbei waren die Geschwindigkeiten dieser beiden Galetten (3 und 4) derart aufeinander abgestimmt, daß in der Hauptstreckzone das POY-Garn E mit einem Verstreckungsgrad von 1:2,0 verstreckt wurde. Vor der Hauptstreckzone war eine Vorverstreckungszone angeordnet, die aus dem Lieferwerk 6 und der Liefergalette 3 bestand. In dieser Vorverstreckungszone wurde das Garn E um 5 % vorverstreckt. Das Garn E war ein Polyester-POY-Garn mit einem Titer von 131 dtex und einer Filamentzahl von 24.A second yarn E, like the yarn K, was fed from a cone (not shown) to a delivery unit 6. The yarn was then transported to a delivery godet 3 and drawn off from there by a take-off godet 4. The delivery godet 3 and the take-off godet 4 formed the main stretching zone for the polyester POY yarn E. Here the speeds were this two godets (3 and 4) matched to one another in such a way that the POY yarn E was drawn in the main drawing zone with a drawing degree of 1: 2.0. Before the main stretching zone, a pre-stretching zone was arranged, which consisted of the delivery unit 6 and the delivery godet 3. In this pre-drawing zone, the yarn E was pre-drawn by 5%. Yarn E was a polyester POY yarn with a titer of 131 dtex and a filament number of 24.

Die Galetten 1 und 3 waren auf eine Temperatur von 90 °C geheizt. Die Temperatur der Galetten 2 und 4 betrug 200 °C. Auch die Galetten 3 und 4 waren von dem Garn E jeweils 20mal umschlungen.The godets 1 and 3 were heated to a temperature of 90 ° C. The temperature of godets 2 and 4 was 200 ° C. The godets E and 20 were each looped around the godets 3 and 4, too.

Die Geschwindigkeit beim Verstrecken betrug 800 m/min.The stretching speed was 800 m / min.

Die Galetten 1 bis 4 weisen einen Durchmesser von 150 mm auf.The godets 1 to 4 have a diameter of 150 mm.

Das Garn K wurde nach Verlassen der Abzugsgalette 2 über eine Benetzungseinrichtung 7 mit Wasser benetzt und gelangte von dort in Pfeilrichtung 11 in eine Düse 8, während das Garn E ohne Benetzung direkt in die Düse 8 (in Pfeilrichtung 11) transportiert wurde. Die Voreilung des Garnes K betrug 5 %, während die Voreilung des Garnes E 18 % ausmachte.After leaving the take-off godet 2, the yarn K was wetted with water via a wetting device 7 and from there came into a nozzle 8 in the direction of the arrow 11, while the yarn E was transported directly into the nozzle 8 (in the direction of the arrow 11) without wetting. The advance of the yarn K was 5%, while the advance of the yarn E was 18%.

In der Düse 8 wurden die Garne K und E miteinander verwirbelt. Am Auslauf der Düse 8 war ein Heizrohr 9 angeordnet, in dem das verwirbelte Kern-Mantel-Garn, bei dem das Garn K den Kern und das Garn E den Mantel ausbildete, auf eine Temperatur von 180 °C erwärmt wurde. Die Voreilung bei der Einführung in die Heizeinrichtung 9 betrug 2 %. Die Länge der Heizeinrichtung 9 betrug 2 m, wobei das verwirbelte Kern-Mantel-Garn mit einer Geschwindigkeit von 800 m/min durch die Heizeinrichtung 9 transportiert wurde. Am Auslauf der Heizeinrichtung 9 wurde das verwirbelte Kern-Mantel-Garn N aufgewickelt.The yarns K and E were intermingled in the nozzle 8. At the outlet of the nozzle 8, a heating tube 9 was arranged, in which the intermingled core-jacket yarn, in which the yarn K formed the core and the yarn E the jacket, to a temperature of Was heated to 180 ° C. The advance in the introduction into the heating device 9 was 2%. The length of the heating device 9 was 2 m, the intermingled core-sheath yarn being transported through the heating device 9 at a speed of 800 m / min. The intermingled core-sheath yarn N was wound up at the outlet of the heating device 9.

Das so hergestellte Nähgarn N wurde anschließend konventionell gefärbt und aviviert. Hiernach wies das Nähgarn einen Kochschrumpf (Wasser 98 °C) von 0,8 % und einen Heißluftschrumpf (160 °C) von 1 % auf. Die spezifische Festigkeit des Nähgarnes betrug 55 cN/tex.The sewing thread N thus produced was then conventionally dyed and finished. According to this, the sewing thread had a cooking shrinkage (water 98 ° C) of 0.8% and a hot air shrinkage (160 ° C) of 1%. The specific strength of the sewing thread was 55 cN / tex.

In der schematischen Zeichnung sind mit 10 Transportvorrichtungen bezeichnet.In the schematic drawing, 10 transport devices are designated.

Das so hergestellte Nähgarn wurde industriellen Nähoperationen unterworfen. Insbesondere wurden hierbei das multidirektionale Nähen bei einer Stichdichte von 7.000 Stichen pro Minute und die Knopflochnäheigenschaften untersucht. Hierbei konnte festgestellt werden, daß sich das nach dem zuvor beschriebenen Verfahren hergestellte Nähgarn in seinen Näheigenschaften nicht von einem analog aufgebauten Material unterschied, bei dem als Seelenmaterial und als Effektmaterial jeweils hochfeste Polyestermultifilamentgarne, d.h. solche Garne, die ein wesentlich höheres Molekulargewicht aufwiesen, verarbeitet waren.The sewing thread thus produced was subjected to industrial sewing operations. In particular, the multidirectional sewing at a stitch density of 7,000 stitches per minute and the buttonhole properties were examined. It was found that the sewing thread produced by the process described above did not differ in its sewing properties from an analogue material in which high-strength polyester multifilament threads, that is to say those threads which had a much higher molecular weight, were processed as core material and as effect material .

Mit dem nach dem vorstehend beschriebenen Verfahren hergestellten Nähgarn wurden Färbeversuche mit unterschiedlichen Farbstoffkombinationen durchgeführt. Bei diesen Färbungen wurden gleichzeitig das zuvor beschriebene konventionelle Nähgarn eingesetzt, das im Kern und im Mantel hochfeste Polyester-Multifilamentgarne aufwies.With the sewing thread produced according to the method described above, dyeing tests with different dye combinations were carried out. In the case of these dyeings, the conventional sewing thread described above was used at the same time, which had high-strength polyester multifilament threads in the core and in the jacket.

Die Bedingungen bei den Färbungen waren wie folgt: Starttemperatur: 70 °C Aufheizgeschwindigkeit auf 130 °C - 2 °C/min Verweilzeit bei 130 °C: 45 Minuten Abkühlung auf 80 °C mit 2 °C/min The conditions for the dyeings were as follows: Starting temperature: 70 ° C Heating rate 130 ° C - 2 ° C / min Dwell time at 130 ° C: 45 minutes Cooling down 80 ° C at 2 ° C / min

Nach dem Färben wurden die Garne zweimal kalt und heiß gespült und anschließend konventionell getrocknet. Die Färbeflotten wurden jeweils durch Zugabe von Essigsäure und Natriumacetat auf einen pH-Wert von 4,5 eingestellt. Ferner wiesen alle Flotten 0,5 g/l eines Dispergier-/Egalisiermittels (Levegal HTN, Fa. Bayer) auf. Zur Anwendung gelangten folgende Farbstoffkombinationen:

  • Farbstoffkombination I:
       0,5 % Resolingelbbraun 3 GL, 200 %ig
    (C.I. Disperse orange 29)
       0,25 % Resolinrot FB, 200 %ig
    (C.I. Disperse red 60)
       1 % Resolinmarineblau 2 GLS, 200 %ig
    (C.I. Disperse blue 79)
  • Farbstoffkombination II:
       3 % Resolinmarineblau 2 GLS, 200 %ig
    (C.I. Disperse blue 79)
       0,15 % Resolingelb 5 GL, 200 %ig
       0,8 % Resolinrot BBC, 200 %ig
  • Farbstoffkombination III:
       0,5 % Resolinblau BBLS, 200 %ig
    (C.I. Disperse blue 165)
       1,5 % Resolingelbbraun 3 GL, 200 %ig
    (C.I. Disperse orange 29)
       0,5 % Resolinrot FB, 200 %ig
    (C.I. Disperse red 60)
  • Farbstoffkombination IV:
       0,1215 % Resolinorange R-3GLS
       0,0265 % Resolinrot R-2BLS
       0,0275 % Palanilbrillantblau BGF
       0,024 % Resolinblau R-RLS
After dyeing, the yarns were rinsed twice cold and hot and then dried conventionally. The dye liquors were adjusted to pH 4.5 by adding acetic acid and sodium acetate. Furthermore, all liquors had 0.5 g / l of a dispersing / leveling agent (Levegal HTN, Bayer). The following dye combinations were used:
  • Dye combination I:
    0.5% resol yellow-brown 3 GL, 200%
    (CI Disperse orange 29)
    0.25% Resolin Red FB, 200%
    (CI Disperse red 60)
    1% Resolin Navy Blue 2 GLS, 200%
    (CI Disperse blue 79)
  • Dye combination II:
    3% Resolin Navy Blue 2 GLS, 200%
    (CI Disperse blue 79)
    0.15% resol yellow 5 GL, 200%
    0.8% Resolin Red BBC, 200%
  • Dye combination III:
    0.5% resoline blue BBLS, 200%
    (CI Disperse blue 165)
    1.5% resol yellow-brown 3 GL, 200%
    (CI Disperse orange 29)
    0.5% Resolin Red FB, 200%
    (CI Disperse red 60)
  • Dye combination IV:
    0.1215% Resolin Orange R-3GLS
    0.0265% resolin red R-2BLS
    0.0275% palanil brilliant blue GFA
    0.024% resoline blue R-RLS

Die Ergebnisse der Färbeversuche ergaben, daß das nach dem vorstehend beschriebenen Verfahren hergestellte Nähgarn keine Unterschiede in der Anfärbbarkeit (Farbton und Farbtiefe) zwischen dem Kernmaterial und dem Mantelmaterial zeigte, während insbesondere das mit den Farbstoffkombinationen II und III gefärbte herkömmlich hergestellte Vergleichsmaterial deutliche Farbton- und Farbtiefenunterschiede zwischen dem Kern- und Mantelmaterial aufwies.The results of the dyeing tests showed that the sewing thread produced by the method described above showed no differences in the dyeability (color tone and color depth) between the core material and the jacket material, while In particular, the conventionally produced comparative material dyed with the dye combinations II and III showed clear differences in shade and depth of color between the core and sheath material.

Claims (34)

  1. A method of drawing a pre-oriented multifilament yarn (POY yarn), whereby the multifilament yarn (K; E) is transported into a main drawing zone (1, 2; 3, 4) via a delivery roller (1; 3), around which the yarn is wound, at a first velocity and is removed from said drawing zone (1, 2; 3, 4) at a second velocity via a drawing-off roller (2; 4), around which the yarn is wound, said second velocity being higher than said first velocity, wherein said drawing in said drawing zone (1, 2; 3, 4) occurs only between said delivery roller (1, 3) and said drawing-off roller (2; 4), characterized in that said drawing-off roller (2; 4) is heated to a temperature of between 160°C and 240°C and that said first and second velocities are so adjusted with respect to each other that said second velocity is 70% to 180% higher than said first velocity.
  2. The method according to claim 1, characterized in that said first and second velocities are so adjusted with respect to each other, that said second velocity is 100% to 160% higher than said first velocity.
  3. The method according to claim 1 or 2, characterized in that said delivery roller (1; 3) is heated to a temperature between 60 °C and 160 °C, preferably to a temperature between 80 °C and 140 °C.
  4. The method according to one of the claims 1 to 3, characterized in that said multifilament yarn to be drawn (K; E) is heated in said main drawing zone (1, 2; 3, 4) to a temperature between 80 °C and 180 °C.
  5. The method according to claim 4, characterized in that a hot plate, an IR radiator and/or a laser is used in the main drawing zone (1, 2; 3, 4) to heat said multifilament yarn (K; E).
  6. The method according to claim 4 or 5, characterized in that said multifilament yarn (K; E) is heated in said main drawing zone (1, 2; 3, 4) for between 0,01 sec and 1 sec.
  7. The method according to one of the claims 1 to 6, characterized in that the delivery roller (1; 3) and/or the drawing-off roller (2; 4) is wound around 5 to 40 times, preferably 10 to 20 times with the multifilament yarn to be drawn (K; E).
  8. The method according top one of the claims 1 to 7, characterized in that in the transport direction of said multifilament yarn to be drawn(K; E) a predrawing zone (1, 5; 3, 6) is provided before the main drawing zone (1, 2; 3, 4).
  9. The method according to claim 8, characterized in that the multifilament yarn (K; E) is prestretched in said predrawing zone (1, 5; 3, 6) between 0,5 % and 10 %, preferably between 1 % and 4 %.
  10. The method according to one of the claims 1 to 9, characterized in that said predrawing and/or said drawing are performed at a drawing-off velocity of between 600 m/min and 1200 m/min.
  11. The method according to one of the claims 1 to 10, characterized in that a relaxation zone (9) is provided after said main drawing zone (1, 2; 3, 4) in the transport direction of said multifilament yarn to be drawn (K; E), in which said drawn multifilament yarn (N) is heated to a temperature between 80°C and 240°C, preferably to a temperature between 140°C and 200°C.
  12. The method according to claim 11, characterized in that said drawn multifilament yarn (N) is delivered to said relaxation zone (9) with an overfeed.
  13. The method according to claim 12, characterized in that said drawn multifilament yarn (N) is fed into said relaxation zone (9) with an overfeed of between 0,5 % and 10 %, preferably of between 1 % and 3 %.
  14. The method according to one of the claims 1 to 13, characterized in that the pre-oriented multifilament yarn (K; E) (POY yarn) is a yarn, the filament titre of which varies between 1 dtex and 12 dtex, preferably between 3 dtex and 8 dtex.
  15. The method according to one of the claims 1 to 14, characterized in that the POY yarn to be drawn (K; E) has a total yarn titre of between 40 dtex and 2000 dtex, preferably of between 80 dtex and 1200 dtex.
  16. The method according to one of the claims 1 to 15, characterized in that the POY yarn to be drawn (K; E) has a number of elementary filaments of between 16 and 300, preferably between 24 and 96.
  17. The method according to one of the claims 1 to 16, characterized in that the POY yarn to be drawn (K; E) is a polyester POY yarn and that the intrinsic viscosity of said yarn lies between 0,5 dl/g and 0,75 dl/g, preferably between 0,55 dl/g and 0,63 dl/g.
  18. The method according to one of the claims 1 to 17, characterized in that said drawn multifilament yarn (K) is intermingled in a turbulent fluid stream, in particular in a gas stream, with at least one second multifilament yarn (E) to form a core-jacket yarn with slings and loops (N), whereby said intermingling (8) is performed in such a manner; that said drawn multifilament yarn (K) forms the inner core and said second multifilament yarn (E) forms the jacket, surrounding said core.
  19. The method according to claim 18, characterized in that said drawn multifilament yarn (K) is fed to said intermingling (8) with an overfeed of between 1 % and 7 % and said second multifilament yarn (E) is fed to said intermingling (8) with an overfeed of between 15 % and 45 %.
  20. The method according to claim 18 or claim 19, characterized in that said drawn multifilament yarn (K) is wetted with water or an aqueous dispersion before said intermingling (8).
  21. The method according to one of the claims 18 to 20, characterized in that said second multifilament yarn (E) is also a pre-oriented multifilament yarn (POY yarn), that is drawn before the intermingling (8).
  22. The method according to claim 21, characterized in that the second multifilament yarn (E) is such a multifilament yarn, the titre of which is 15 % to 40 % and the number of elementary filaments of which is 30 % to 250 %, preferably 80 % to 140 % relative to the titre and the number of the filaments of the multifilament yarn forming the core (K) of the core-jacket-yarn (N).
  23. The method according to claim 21, characterized in that said second multifilament yarn (E) is drawn in the drawing process at a velocity which is 70 % to 180 %, preferably 100% to 160%, higher than the delivery velocity.
  24. The method according to one of the claims 18 to 23, characterized in that one to four multifilament core yarns (K) are intermingled with one to four multifilament effect yarns (E).
  25. The method according to one of the claims 18 to 24, characterized in that said intermingled core-jacket yarn (N) is twisted between 10 turns per metre and 1000 turns per metre, preferably between 100 turns per metre and 600 turns per metre.
  26. The method according to one of the claims 18 to 25, characterized in that said intermingled core-jacket yarn (N) is dyed and/or applied with a yarn preparation after said intermingling (8).
  27. The method according to one of the claims 18 to 26, characterized in that said intermingled core-jacket yarn (N) is subjected to a tensioning treatment, such that the interlacing slings and loops formed by the intermingling (8) are so reduced in size, that their diameter is reduced by about 20 % to about 95 %, relative to their original diameter.
  28. The method according to claim 27, characterized in that said intermingled core-jacket yarn (N) is fed to said tensioning treatment at a velocity, that is between 0,1% and 5%, preferably between 0,1% and 2,5%, lower than the velocity at which the yarn is drawn off from said tensioning treatment.
  29. The method according to one of the claims 18 to 28, characterized in that said intermingled core-jacket yarn (N) is subjected to a thermal treatment (9) at a temperature of between 100°C and 250°C, preferably of between 180°C and 240°C.
  30. The method according to claim 29, characterized in that said thermal treatment (9) is performed in a stream of hot air.
  31. The method according to one of the claims 29 or 30, characterized in that said thermal treatment (9) is performed for between 0,01 sec and 10 sec, preferably for between 0,05 sec and 1 sec.
  32. The method according to one of the claims 29 to 31, characterized in that said intermingled core-jacket yarn (N) is delivered to said thermal treatment (9) at a velocity, that is the same as or higher than the velocity, at which the yarn is drawn off from said thermal treatment.
  33. The method according to one of the claims 18 to 32, characterized in that the drawn multifilament yarn (K) and the multifilament yarn intermingled with it (E) are polyester yarns.
  34. The method according to one of the claims 1 to 33, characterized in that said method is used to produce a sewing thread.
EP93107495A 1992-05-12 1993-05-08 Drawing process Expired - Lifetime EP0569889B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4215015 1992-05-12
DE4215015A DE4215015A1 (en) 1992-05-12 1992-05-12 Stretching process

Publications (2)

Publication Number Publication Date
EP0569889A1 EP0569889A1 (en) 1993-11-18
EP0569889B1 true EP0569889B1 (en) 1995-11-22

Family

ID=6458325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107495A Expired - Lifetime EP0569889B1 (en) 1992-05-12 1993-05-08 Drawing process

Country Status (10)

Country Link
US (1) US5375310A (en)
EP (1) EP0569889B1 (en)
AT (1) ATE130639T1 (en)
CA (1) CA2113191C (en)
CZ (1) CZ284524B6 (en)
DE (2) DE4215015A1 (en)
ES (1) ES2081658T3 (en)
HK (1) HK184496A (en)
SK (1) SK282521B6 (en)
WO (1) WO1993023593A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW503274B (en) 1998-02-04 2002-09-21 Hna Holdings Inc Calendering apparatus and method for heat setting a traveling multi-filament tow
US6210622B1 (en) 1999-07-19 2001-04-03 Arteva North America S.A.R.L. Process of making polymeric fibers
DE102011102560A1 (en) * 2011-05-26 2012-11-29 Oerlikon Textile Gmbh & Co. Kg Apparatus for stripping and drawing a synthetic thread

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Publication number Priority date Publication date Assignee Title
CH432710A (en) * 1965-09-22 1967-03-31 Rieter Ag Maschf Method and device for relaxing high polymer mono- or multifilaments after the drawing process and a device for carrying out the method
US3539680A (en) * 1967-08-07 1970-11-10 Teijin Ltd Process and apparatus for drawing polyester filaments
US3781953A (en) * 1972-04-26 1974-01-01 Phillips Petroleum Co Yarn processing apparatus
US4057274A (en) * 1976-09-29 1977-11-08 Brammall, Inc. Method and apparatus for bracing and securing doors
JPS59173335A (en) * 1983-03-02 1984-10-01 エンタ−プライズ・マシ−ン・アンド・デイベロツプメント・コ−ポレ−シヨン Production of yarn
US4571793A (en) * 1983-03-02 1986-02-25 Enterprise Machine And Development Corp. Air jet texturing system for the production of uniform textured yarn
DE3436488A1 (en) * 1984-10-05 1986-04-10 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Magnetic powder coupling
US4825517A (en) * 1984-11-15 1989-05-02 Phillips Petroleum Company Apparatus for drawing and interlacing
JPS63264940A (en) * 1987-04-20 1988-11-01 三菱レイヨン株式会社 Stretching machine
US5146738A (en) * 1987-05-15 1992-09-15 Amann Und Sohne Gmbh & Co. Thread having looped effect yarn intermingled with multi-filament core yarn
DE3720237A1 (en) * 1987-06-15 1989-01-05 Amann & Soehne METHOD FOR PRODUCING AIR BLOW TEXTURED SEWING THREAD
DE3831700A1 (en) * 1988-09-17 1990-03-22 Amann & Soehne METHOD FOR THE PRODUCTION OF A YARN, IN PARTICULAR A SEWING YARN, AND A YARN
DE3917338A1 (en) * 1989-05-27 1990-11-29 Didier Eng METHOD AND DEVICE FOR PRODUCING SMOOTH YARN FROM THERMOPLASTIC ARTIFASTS, PARTICULARLY SMOOTH POLYESTER YARN
US5136763A (en) * 1990-12-18 1992-08-11 E. I. Du Pont De Nemours And Company Process for the production of uniform yarns via reduced tension-induced slippage

Also Published As

Publication number Publication date
DE4215015A1 (en) 1993-11-18
US5375310A (en) 1994-12-27
EP0569889A1 (en) 1993-11-18
ATE130639T1 (en) 1995-12-15
CZ6794A3 (en) 1994-07-13
AU665656B2 (en) 1996-01-11
AU4259693A (en) 1993-12-13
CA2113191A1 (en) 1993-11-25
CZ284524B6 (en) 1998-12-16
CA2113191C (en) 1999-01-05
DE59300985D1 (en) 1996-01-04
SK282521B6 (en) 2002-10-08
ES2081658T3 (en) 1996-03-16
WO1993023593A1 (en) 1993-11-25
HK184496A (en) 1996-10-11
SK4094A3 (en) 1994-06-08

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