EP1585851B1 - Method and device for the production of multifilament yarns - Google Patents

Abstract

In a continuous process, the thread components (A, B) are manufactured separately and then combined. The combined thread (C) is only then wound onto a reel (9) for further processing. The component (A) has an irreversible extension property, when heated appropriately. It is first stretched, and heated to shrink it. It is then combined with the other multifilament component (B) and bound. This is stretched before combination, in parallel with treatment of the extensible component (A). The extensible component (A) is heated to a shrinkage temperature (Ts). It is supplied in excess during heating, to induce the extension capability, whilst avoiding mechanical contact. The shrinkage component (B) and the extension component (A) undergo tensioning before stretching. The extension component (A) is first stretched, the extension ratio exceeding unity. It is then relaxed with an extension ratio less than unity, before undergoing heat treatment for shrinkage. The components are drawn from storage reels (1A, 1B) and differential stressing arising, is regulated before the stretching process. The threads (A, B) undergo heat treatment during stretching. The extension component (A) runs up the heater (7) with the force of gravity acting upon it, from below. Before the heat treatment for shrinkage, extension component (A) undergoes a heat treatment in which its filaments are preheated to just below the shrinkage temperature (Ts). They are held at this temperature, until the shrinkage heat treatment starts. Bonding of the threads to a combined thread (C) is effected by air-twisting, with at least 100 nodules per meter, depending on the thread strength. Bonding is effected by air-texturing. An Independent claim is included for corresponding manufacturing equipment.

Description

The invention relates to a method and an apparatus for producing a two- or multi-component multifilament yarn, the components of which have different shrinkage behavior, wherein at least one component is irreversibly self-renewable by heat, and the components are combined to form a combination yarn, wherein the length change potential of the components after the processing to a fabric by a heat treatment is triggered.

Such yarns are for example by the DE 39 15 945 known. Thereafter, these composite yarns consist of at least two components, wherein the one component expands to a textile fabric during heat treatment after processing and the other component shrinks in this heat treatment. These yarns are therefore also referred to as Differentiaischrumpfgarne. Preferably, the two components are joined together by swirling.

The preparation of this combination yarn is carried out in two separate steps: Component A is drawn from a spool as non-drawn yarn, drawn in a drafting field, then subjected to heat treatment by a non-contact heating device in a relaxed state, whereby this component A has the property of being processed Condition to spontaneously extend upon heat treatment in the equipment. The component B is solidified and stabilized in a stretching process and then wound on a coil. This coil is used in a second stage as a template for the production of the combination yarn C, wherein the component B is withdrawn from a coil as a drawn yarn and combined with the leaking from the heat treatment component A. Both components A and B are connected to each other in a turbulizer by swirling.

In this manufacturing process, only production speeds of about 150 to 300 meters per minute are achieved if a useful elongation of component A is to be produced. Apart from the heater, which must be prolonged for higher production speeds not insignificant, higher take-off speeds of the coil, especially in the component B, can not be achieved without resulting in the withdrawal of the coil voltage fluctuations on the very delicate yarn and the bonding process of the Components A and B impact. It has been shown in practice that can therefore achieve no qualitatively satisfactory results with this known method, especially at higher production speeds. Another disadvantage is that it is necessary for a trouble-free stripping of the yarn B from the spool and to avoid filament breaks, to apply a turbulence. This already pre-twisted yarn can be significantly worse with the component A connect, resulting in combination yarn to irregular loops and processing difficulties and affects the appearance of goods.

By the JP-PS 09 25 00 36A It is known to produce a two-component multifilament yarn, wherein the two components are produced parallel to each other and combined by a swirling device with the aim to initiate the different shrinkage of the components by a heat treatment of the woven yarn and thereby obtain a voluminous, fluffy fabric. One component is false twist texturized by this known method. As a result, the above-described Spulenablaufschwierigkeiten be avoided. The fabric gets elastic properties and is voluminous. The other component is extended by the heat treatment in the processed state. This different length behavior creates loops that give the fabric voluminous and fluffy properties.

A disadvantage of this known method is that shrinkage properties are lost as a result of the heating during the false twist texturing of this component. False twist texturing ruffles the filaments. Due to the production process of the extension component, the productivity is limited, because to achieve a suitable self-extension potential of this component (over 10% self-extension) 400 m / min delivery speed must not be exceeded:

It is an object of the present invention to provide a high productivity process and apparatus for producing such improved quality combination yarns with high shrinkage effect and improved processability to produce high bulkiness soft fabrics.

This object is achieved according to the features of the method claim 1 and the device claim 13.

By producing the combination yarn in a single continuous process, the winding and stripping of the shrink component and the associated yarn tension fluctuations are avoided. Also, the Vorverwirbeln required for the winding process, which adversely affects the connection of the two components, is eliminated. In addition, high handling and transport costs and the need for additional expensive winding tubes are saved. The yarn remnants resulting from each template and their removal on the supply bobbins are also eliminated. Property irregularities of the shrink yarn B, which are caused by intermediate storage of the coils or a false twist texturing, are avoided.

The stretching of the shrinkage component is carried out in parallel with the treatment of the extension component without any texturing, so that the combination yarn including its components in a single continuous Process is produced as a smooth, almost loop-free yarn. Both components can thereby be adjusted and bonded under equal yarn tension conditions, resulting in high quality and uniformity of the combination yarn. Tension prior to stretching of the components has been found to be useful to balance stress variations and to achieve uniform conditions in the draw zone. For this purpose, a retaining element is expediently provided which generates and regulates the desired thread tension. Furthermore, it has proven to be advantageous if the extension component passes vertically through the heater against gravity from bottom to top, because it is best a wall contact is avoided and also better and more uniform heating of the individual filaments of the component takes place in the heater.

Heat pretreatment prior to the actual heat treatment for shrinkage has surprisingly been found to be extremely effective for good quality and for achieving high production rates. The stretched filaments are already preheated to a temperature close to the shrinkage temperature at the inlet to the heater, so that the filaments are heated with a much shorter heating distance to the required temperature above the shrinkage temperature T _S. The temperature gradient between heater and yarn is smaller than in the previous heating system. The gradual, gradual heating causes all filaments to reach the same temperature at the same time and avoid looping, for example, by premature heater-induced shrinkage. Especially with coarser yarn components, a better and more uniform heating of all filaments takes place, which is also of great importance for the quality of the loop formation in the textile fabric. In the further processing of the combination yarn in weaving and knitting disturbing filament loops, which arise in the previous heating systems by shrinkage differences are significantly reduced, the combination yarn is virtually loop-free. With Preheating the actual radiator can be shortened, whereby the process stabilized and the production speed can be increased. In order to avoid a cooling of the yarn between heat pretreatment and the heat treatment for the shrinkage, the preheating is arranged immediately in front of the heater for the shrinkage, encapsulated by a housing or integrated into the heater.

Fig. 1

Eine schematische Darstellung des Differentialschrumpfgarnes nach Auslösung des Differential schrumpfeffektes im Garn.

Fig. 2

Eine schematische Darstellung des Herstellungsprozesses für ein Kombinationsgarn gemäß der Erfindung.

Fig. 3

Eine andere Ausführung des Herstellungsprozesses nach Fig. 2, jedoch mit Zusatzeinrichtungen zur Optimierung des Prozes- ses.

Fig. 4 und 5

Verschiedene Ausführungen der Abzugsvorrichtung für das Kombinationsgarn.

Fig. 6

Abhängigkeit der Anzahl der Verwirbelungsknoten im Kombina- tionsgarn von der Garnfeinheit.

Fig. 7

die Heizung für Komponente A.

Fig. 8

Temperaturprofil der Komponente A.

Fig. 9

Temperatur-Diagramm der Heizung gemäß Fig. 7.

Further details of the invention will be explained with reference to the drawings. Show it:

Fig. 1

A schematic representation of the differential shrinkage yarn after triggering the differential shrinkage effect in the yarn.

Fig. 2

A schematic representation of the manufacturing process for a combination yarn according to the invention.

Fig. 3

Another embodiment of the manufacturing process after Fig. 2 , but with additional equipment to optimize the process.

4 and 5

Different versions of the take-off device for the combination yarn.

Fig. 6

Dependence of the number of swirling knots in the combination yarn on the yarn count.

Fig. 7

the heater for component A.

Fig. 8

Temperature profile of component A.

Fig. 9

Temperature diagram of the heating according to Fig. 7 ,

zum Ausdruck gebracht. Dabei wird die Anzahl der Verwirbelungsknoten am Kombinationsgarn C am ausgerüsteten Gewebe oder Gestrick gezählt. Liegt die Anzahl der Verwirbelungsknoten in Abhängigkeit der Garnstärke (Formel) und bezogen auf das Garn im ausgerüsteten Gewebe bei mindestens hundert Knoten pro Meter oder darüber, so ergeben sich gut eingebundene Schlingen mit großem Stehvermögen und Gleichmäßigkeit. Die Filamente der Garnkomponente A bilden beim Auslösen der Längenänderung während der Wärmebehandlung des Gewebes in der Ausrüstung Mikroschlingen, die eine Textur im Gewebe erzeugen und so den Griff und die funktionellen Eigenschaften wesentlich verbessern. Die Oberflächenstruktur ist voluminös, die Ware hat einen trockenen, weichen und zarten Griff. Je nach Filament- und Gamfeinheit stellt sich ein Pfirsichhauteffekt "peach skin", Samtcharakter, Seidencharakter, Leinen, Woll- oder Baumwollcharakter ein. FIG. 1 shows schematically the structure of the differential shrinkage yarn C after triggering the differential shrinkage effect, which is caused by the connection of the components A and B. The combination yarn C is subjected to a heat treatment in the finished fabric, in which the differential shrinkage is triggered, that is, the component A is elongated, while the component B shrinks and therefore is stretched in the differential shrinkage yarn C. The two components A and B are interconnected by the Verwirbelungsknoten K. The number of nodes with which the two components A and B are connected to each other has a significant influence on the quality of the combination yarn C. It has been found that the number of knots necessary for a quality combination yarn can not be determined as a whole, but from the gamf unit of the Combination yarn C is dependent. In FIG. 6 this dependency is shown graphically, which was determined on the basis of a large number of experiments. Below this curve are the values of the combination yarns C, which were classified as insufficient and deficient. Above the curve are the values of the combination yarns C classified as qualitatively perfect. This graph is best described by the relationship $$\mathrm{Number\; of\; swirl\; nodes}\mathrm{/}\mathrm{m}\mathrm{\ge }\frac{\mathrm{300}}{\sqrt{\mathrm{fineness}\left[\mathrm{dtex}\right]}}\mathrm{+}\mathrm{88}$$

expressed. In this case, the number of Verwirbelungsknoten is counted on the combination yarn C on the equipped fabric or knit. If the number of entangling knots, depending on the yarn size (formula) and based on the yarn in the finished fabric at least a hundred knots per meter or more, well-bound loops with great staying power and uniformity result. The filaments of Yarn Component A, upon initiation of the change in length during the heat treatment of the fabric in the equipment, form micro-loops which create a texture in the fabric and thus the hand and functional properties improve significantly. The surface texture is voluminous, the fabric has a dry, soft and delicate feel. Depending on the filament and yarn unit, a peach skin effect "peach skin", velvet character, silk character, linen, wool or cotton character sets in.

The starting materials are substantially the same for both components, polyester filaments are preferably used. The properties for this different shrinkage or elongation receive the filaments by different treatment before the two components are brought together and joined together. In FIG. 2 schematically the treatment process for the component A (extension component) and component B (shrink component) is shown. Both components are placed in the form of pre-oriented filament yarn (POY) on conventional creels and removed overhead.

As in FIG. 2 the multifilament yarn is drawn for producing the component A from a coil 1A through an eyelet 15 and fed to a draw roller 2, which forms a drafting field with the following draw roller 3. In the stretching of the master material 1A between the stretch rollers 2 and 3, the stretch roller 2 is heated with a surface temperature which is chosen so that the filaments above it undergo heating to a temperature in the range of the so-called. Glass transition temperature T _G , so that after the Stretching a maximum tensile strength according to ISO 2062 of the yarn of 25% to 40% is achieved. The temperature of the heated draw roll 2 is chosen so that the drawn yarn A has the shrinkage capacity required for the subsequent process. The degree of crystallization of the drawn filaments is thus higher than that of the master material.

To achieve the spontaneous thermal expansion after processing, for example in a fabric, it is necessary to heat the stretched filaments in the relaxed state to a temperature T _L , the above Shrinkage temperature T _S is ( Figure 8 ). This takes place between the rolls 3 and 4, the roll 3 supplying the filaments with a lore (degree of diffusion <1), which corresponds almost to the shrinkage capacity of the filaments of the extension component A. From the roll 3, the yarn A is thus supplied to the heater 7 much faster than it is withdrawn by the roller 4, so that the filaments under the heating effect of the heater 7 can shrink by about 30% to 55%. As a result of this shrinkage treatment, component A acquires the property of spontaneously and irreversibly extending later in a heat treatment in the processed state. During this shrinking process, the filaments must be able to move freely to shrink unhindered. It is therefore a heater 7 is used in which the threads have no mechanical contact during their passage. Convection heaters are preferably used here, in which the filaments are heated by air or steam or the like.

Suitably, this heater 7 is arranged vertically to prevent sagging of the relaxed filaments. Furthermore, it has proved to be advantageous to guide the component A from the bottom up against gravity by the heater 7, so that the weight of the thread supports the required shrinkage during the reduction of the thread speed. On the other hand, the chimney effect has a favorable effect in this direction of passage, since not the hottest temperature acts immediately on the thread. By the incoming air, the heating power comes gradually to effect. The filaments are heated more evenly. It has surprisingly been found that the heating of the filaments is not shock-like, but must be gradual, to obtain a loop-free, smooth yarn that can be further processed trouble-free even at high production speeds.

After leaving the heater 7 via the roller 4, the extension component A is combined with the shrink component B. The shrink component B has now also undergone its treatment, which is necessary to shrink in the processed state during heat treatment. The master material 1B is withdrawn overhead through a suture loop 16 and fed to the draw roll 5, which forms a drafting field with the subsequent draw roll 6, in which the filaments are subjected to stretching so that they have a maximum tensile elongation of 25% to 40% after drawing % and a wet shrinkage of 1% to 70%. The draw roller 5 is heated to heat the filaments for the drawing operation. Following this stretching then the merge with the component A. Between the roller 6 and the roller 4, the thread tension formed by the stretching process in the component B of the thread tension of the component A is adjusted so that a uniform turbulence of the two components in the turbulator 8 is guaranteed. The turbulizer 8 leave the now connected by the swirling components A and B as a combination yarn C, which is guided by a arranged in front of the winder 9 Fadenzuführöse 91 and wound up into a coil.

The combination yarn C produced by this one-step process is characterized by high quality and uniformity. By the parallel guidance of the treatment processes for the extension component A and for the shrinkage component B, both components A and B can be brought together under completely identical conditions at the end, which is essential for the subsequent connection in the turbulizer. Both components are smooth. Due to the gradual warming of the component A in the heater 7, despite the high lore for the shrinking loop formation is avoided, which occurs in the usual shock heating. Neither an additional winding process with required winding tubes, nor a corresponding logistics and transport is required to bring the two components together. The stress on the filaments and the risk of filament breaks are avoided without additional measures, such as a so-called Vorverwirbelung would be required for the winding of the component B. This Vorverwirbelung, which is necessary to avoid disturbances when winding up and down the filaments on a coil, prevents a uniform and good connection of the components A and B and also leads to looping.

In FIG. 3 another embodiment of the single stage process is shown. Here, the process has been optimized by some additional equipment, so that even higher production speeds can be achieved while maintaining and even increasing the quality. As in FIG. 2 Here, too, supply rolls 1A and 1B with preoriented polyester multifilament yarns (PET-POY), which are pulled off at the top by thread eyelets 15 and 16, respectively, are provided as the original material. Before the draw roller 2 here is a delivery mechanism 10 is arranged, which exerts a certain retention function, so that a tension of the filaments to equalize the fluctuating in the withdrawal of the coil voltage of the drawing in the draw field between the rollers 2 and 3 thread. In the simplest version can be used as a retaining element and a thread brake. In this way, the differing thread tensions resulting from printing from the original 1A are adjusted to a desired value prior to the stretching process. In addition, a contact heater 14 is also provided in the drafting field for heating the filaments during drawing to obtain the desired maximum tensile strength and shrinkage values. From the draw roller 3, the filament yarn now does not run directly into the heater 7, but only through a roller 71, which serves as a preheater and is located immediately in front of the heater 7, to avoid an intermediate cooling of the yarn largely. Between the draw roll 3 and the roller preheater 71, the filaments are relaxed after stretching before undergoing the heat pretreatment. By this relaxation, which can be done by a slight lore, the shrinkage process is improved, and the shrinkage potential of the drawn yarn A can be better utilized.

This heat pretreatment has proved to be extremely important and expedient, especially when component A is coarser. Namely, there arises the problem of uniformly heating all filaments in the heater 7. When the filaments are not sure to be at the same temperature above the shrinkage temperature T _S at the same time, they will shrink differently and undesirable loops will form, which will be detrimental to the processing of the combination yarns C. For a good processing behavior, the yarns C otherwise z. B. for the weaving additionally finished or provided with rotation. The production cost of the yarn would almost double by such an additional measure.

In the preheater 71, which is designed as a contact heater, expediently as a heated roller, the filaments are heated to a temperature just below the shrinkage temperature T _S , so that only a small temperature difference must be heated in the heater 7 for the shrinking process, namely from dense below the shrinkage temperature T _S to above the shrinkage temperature T _S to the temperature required for the elongation properties T _L ( Figure 8 ). The heater 7 can thus not only be considerably shorter, but it can be driven with such a two-stage heating and much higher speeds.

In order to largely avoid an intermediate cooling of the yarn, this preheater 71 is arranged as close as possible in front of the heater 7, optionally also integrated into this by means of a screening hood 72, or both heaters 7 and 71 are combined to form a two- or multi-stage heater. For the preheater 71, a preferably designed as a heated roller contact heater is used, the heat transfer is much more efficient than a convection heater.

After leaving the heater 7, the extension component A is withdrawn through the pair of rollers 4 and thereby merged with the shrink component B.

The heater 7 may be carried out in one or more stages to ensure uniform heating of all filaments. In Fig. 7 Such a stage heater is shown in detail, in which also the preheater 71 is included. It begins with the preheater 71, which gives the filaments a temperature just below the shrinkage temperature T _S , where they are relatively insensitive. At this temperature, the filaments enter the heater 7. By the housing 72 cooling on transition into the heater 7 is prevented. The heater 7 is divided into three heating zones, which are traversed by the filaments of component A. In the first heating zone, a heating element H1 is installed, which acts on the filaments at a temperature T _H1 ( Fig. 9 ). The temperature of the filaments rises slowly, so that all filaments can follow this increase in temperature despite high production speed. In the second zone, a heating element H2 with the temperature T _H2 acts, and there is a further heating of the filaments. Only at the end of the third zone with the temperature T _H3 the filaments reach the temperature required for the desired elongation properties T _L , with which the component A leaves the heater.

Fig. 8 schematically shows the temperature profile of the filaments during their heating in the heater 7. Here, the dashed line shows schematically the temperature increase in the filaments when using a single, over the length of the heater 7 evenly with the temperature T _H acting heating element. As can be seen, a gradual heating can be achieved here as well, if the filaments go through the heater 7 from bottom to top. Due to the resulting air flow (chimney effect), the air in the heater 7 is warmer at the top than below. When using and corresponding tuning of stepped heating elements H1, H2, H3, the time can be reduced at which the filaments reach a temperature above the shrinking temperature T _S have. Immediately after leaving the heater 7, the temperature of the filaments is brought back to a temperature lower than T _S.

The shrinkage component B has since been treated in parallel to obtain the desired shrinkage properties. From a feed bobbin 1 B, the multifilament yarn is withdrawn through a thread eyelet 16 overhead. Again, a delivery mechanism 12 is arranged in front of the draw roller 5 in order to achieve a tension of the filaments before entering the draw frame between the draw rollers 5 and 6. Instead of a delivery mechanism 12, a yarn brake 111 or another retaining device can also be provided here. It is only important that a certain bias of the multifilament yarn can be generated.

In addition, in the drafting field between the draw rollers 5 and 6, a contact heater 13 is arranged to heat the filaments to the temperature necessary for stretching. Subsequently, a voltage equalization between the draw roller 6 and the delivery mechanism 4, so that the component B is brought together under the same stress conditions with the extension component A and connected in the connecting device 8. Via a take-off roller pair 11, the thread tension in the connecting device 8 is regulated. This measure has proven to be extremely advantageous for the uniformity of the turbulence and thus the quality of the combination yarn C. Instead of the take-off device 11, it is also possible to use a yarn brake 111 to regulate the yarn tension in the connecting device 8, as in FIG FIG. 5 be shown provided. The finished combination yarn C then runs into the winder 9 via the thread feed eye 91 for winding.

Claims (22)

1. A method for producing a multifilament yarn, having two or more components, the components thereof having different shrinking properties, at least one component of the multifilament yarn being irreversibly self-elongating under the effect of heat, and the yarn components (A, B) each being produced individually in a continuous process, then being combined and joined into a combination yarn (C), the potential for changing length of the components (A, B) being able to be initiated by heat treating after processing into a textile web material, characterized in that the components (A, B) of the combination yarn (C) are produced without loops, wherein the yarn component (A) is heated in a first heat treating stage (pre-heating) to a temperature slightly below the shrinking temperature (Ts) before being heated without contact in a further heat treating stage to a temperature (TL) above the shrinking temperature (Ts).
2. The method according to claim 1, characterized in that the one multifilament component (A) (elongation component) is drafted, then shrunk by stepwise heating, and after the shrinking process is combined and joined to the other multifilament component (B) (shrink component) that was drafted temporally in parallel to the treating of the elongation component (A).
3. The method according to claim 2, characterized in that the elongation component (A) is heated stepwise to a temperature (TL) above the shrink temperature (Ts).
4. The method according to one or more of the preceding claims, characterized in that the filaments of the component (A) are held at a constant temperature slightly below the shrink temperature (Ts) for a specific time before starting the heating to the temperature (TL) above the shrink temperature (Ts).
5. The method according to one or more of the preceding claims, characterized in that the increase to the temperature (TL) required for the desired elongation characteristics occurs gradually in the thread progression direction over the heating section.
6. The method according to one or more of the preceding claims, characterized in that the elongation component (A) is fed, counter to gravity, vertically upward from below during heating to the temperature (TL) above the shrink temperature (Ts), while avoiding mechanical contact.
7. The method according to one or more of the preceding claims, characterized in that the elongation component (A) is first drafted to a drafting degree >1 and then relaxed to a drafting degree <1 during the heat treating for shrinking.
8. The method according to one or more of the preceding claims, characterized in that the elongation component (A) is first drafted to a drafting degree >1 and then relaxed before undergoing heat treating for shrinking at a drafting degree <1.
9. The method according to one or more of the preceding claims, characterized in that the shrink component (B) and the elongation component (A) are subjected to a tension before drafting.
10. The method according to one or more of the preceding claims, characterized in that the components (A, B) undergo heat treating during drafting.
11. The method according to one or more of the preceding claims, characterized in that the joining into a combination yarn (C) takes place by air swirling.
12. The method according to claim 11, characterized in that the swirling takes place at at least 100 knots per meter as a function of the yarn thickness (Fig. 6; formula) relative to the yarn in the finished weave or knit.
13. A device for producing a multifilament yarn, having two or more components, the components (A, B) thereof having different shrinking properties, at least one component (A) of the multifilament yarn being able to be irreversibly self-elongating under the effect of heat, and a drum device (1) being provided for each component (A, B), followed by process devices each operating in parallel for separately treating the components (A, B) and a common joining device (8) and winding device (9) for both process devices, characterized in that the process device for the elongation component (A) comprises a drafting zone formed by drafting rollers (2, 3) and a stepped heater (7; 7, 71), whereas the process device for the shrink component (B) has a drafting zone formed by drafting rollers (5, 6) followed by a supplier (4) for combining the components (A, B).
14. The device according to claim 13, characterized in that the heater comprises a heating device (7) before which a preheating device (71) is disposed.
15. The device according to one of the claims 13 or 14, characterized in that the heating device (7) has a temperature profile increasing in the thread progression direction over the heating section.
16. The device according to one of the claims 14 or 15, characterized in that the preheating device (71) is disposed in a housing (72) directly before the heating device (7).
17. The device according to one or more of the claims 14 to 16, characterized in that the preheating device (71) is integrated in the heating device (7).
18. The device according to one or more of the claims 13 to 17, characterized in that the joining device (8) consist of an air swirling nozzle.
19. The device according to one or more of the claims 13 to 18, characterized in that a drag element is provided before each of the drafting zones of the components (A, B) for generating a tension (10, 12).
20. The device according to one or more of the claims 13 to 19, characterized in that a device (11, 111) for adjusting the tension of the combination yarn (C) in the joining device (8) is disposed after the joining device (8) but before the winder (9).
21. The device according to one or more of the claims 13 to 20, characterized in that a contact heating device (14) is disposed between the drafting rollers (2, 3) in the drafting zone of the process device for the elongation component (A).
22. The device according to one or more of the claims 13 to 21, characterized in that a contact heating device (13) is disposed between the drafting rollers (5, 6) in the drafting zone of the process device for the shrink component (B).

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