DE19920177A1 - Melt spinning of continuous polymer filaments - Google Patents

Abstract

Melt spinning continuous polymer filaments, includes false twisting them within a false twisting zone, where they are heated at a temperature above the glass transition temperature of the polymer and then immediately cooled to a lower temperature. An Independent claim is included for a filament melt spinning assembly with a heater (14) at the false twisting zone (2) between the spinneret (1) and the false twister (16), followed by a cooling unit (15) for the thermal treatment applied to the filaments (17). Preferred Features: The heating temperature of the filaments = 150-250 deg C and their cooling temperature = 50-120 deg C. Within the false twisting zone, the filaments are subjected to draw tension forces equal to or greater than the draw force required to give them a plastic distortion. The draw forces are applied by a take off godet in front of the false twisting zone, in the direction of filament travel, and a drawing godet after the false twisting zone. The false twisting zone has a lateral air stream directed at the filaments. The air stream is at a cooling temperature, to reduce the filament temperature level. At least one friction surface of a false twister is in contact with the filaments, to give a false twist. The filaments are drawn partially between the spinneret and the false twisting zone, using a heated longitudinal guide tube or narrow heated groove, where the filaments are heated and drawn without contact with a heated surface. The filaments are given a heat treatment, to prevent shrinkage, between the false twisting zone and the bobbin winder. The heater (14) has a longitudinal heating surface, with a gap between it and the moving filaments (17) and without contact between them. The false twisting zone (2) is after a take off godet (13), which takes the filaments (17) from the spinneret (1). A drawing godet (18) is after the false twister (16), working with the take off godet (13) to apply a draw tension to the filaments (17). A pneumatic twisting jet, at the false twisting zone (2), has a jet channel opening at a tangent into the filament channel and connected to a compressed air supply. The cooling unit has a cooling tube, where the filaments pass through generally without contact. The twisting jet is at the outlet from the cooling tube to deliver an air stream into the filament channel against the direction of filament travel along the cooling tube, to reduce the filament temperature. The twisting jet with the cooling tube are in a cooling circuit, together with the compressed air supply and a heat exchanger, to give a cooing air stream from the jet. The false twister (16) has a rotating friction disk and at least one belt drive. The friction disk lies on a plane at right angles to the filament path, so that the filaments (17) are in contact with the disk circumference at a friction point. The belts of the belt drives press the filaments (17) against the friction points at the disk with the belts aligned at an angle to the disk plane. The friction disk has a number of friction points round its circumference, each with a belt drive to press the filaments against its friction circumference surface, to give a simultaneous false twisting action to a number of filaments. A drawing unit partially draws the filaments (17) before they enter the false twisting stage (2), using a heated tube round the filament path where the filaments (17) pass through it without contact to be drawn. An air stream flows through the heated tube, against the direction of filament movement. A relaxation stage, for filament shrinkage treatment, is between the false twister (16) and the bobbin winder (3).

Description

The invention relates to a method for producing an endless thread a synthetic polymer melt according to the preamble of claim 1 and an apparatus for producing an endless thread according to the Preamble of claim 12.

When making an endless thread from a synthetic Polymer melt becomes a variety of polymer melt Filament strands extruded, which after cooling are combined to form the thread become. The thread thus has a large number of individual filaments, the Combining the properties and quality of the thread is decisive influence. The cohesion of the filaments, the so-called thread closure can be produced by various methods. So is known to produce the thread closure by applying an oily preparation. This method has the disadvantage, however, that the preparation is difficult subsequent heat treatments evaporated and became a little unstable Thread closure leads. It is also known that the thread closure by Whirling of the filaments is generated by means of an air stream. Kick here Intertwining points in the thread, which are uneven Cross-sectional course of the thread result.

From DE 25 30 618 a method and a device are known in which the entanglement of the filaments is generated by a false twist. The false twist leads to a very even thread closure. In which  known method, however, there is the problem that after leaving the False twist zone of the thread has no false twist, so that the thread has one has unstable thread closure.

Accordingly, it is an object of the invention to provide a method and an apparatus create an endless thread from a synthetic Polymer melt is produced with a uniform and stable thread closure. Another object of the invention is to provide a method in which an entanglement of the filament strands is achieved, which ripples the Thread equals.

This object is achieved according to the invention by a method with the features of claim 1 and by a device with the features of the claim 12 solved.

The invention is characterized in that entanglements of the Filament strands are fixed within a false twist zone. For this, the Thread with the false twist to a hot temperature above the glass temperature of the polymer heated and immediately afterwards to a cold temperature cooled below the hot temperature. This remains in the filament strands Preserve swirl effect, which does not occur even in the case of a reverse twist on the false twist unit completely solves. The filament strands of the thread remain entwined, so that the thread has an even and stable thread closure for subsequent processes having.

The process is for all common polymer types such as polyester, Suitable for polyamide or polypropylene. Here, the hot temperature and the cold temperature is set depending on the type of polymer. To one to be able to carry out effective fixation within the false twist zone, however, the hot temperature should be at least in the range between 150 to 250 ° C. During the subsequent cooling, the thread is on one  Cool temperature in the range of 50 to 120 ° C. For threads made of polyester For example, the hot temperature is approximately 200 ° C and the cold temperature is approximately 80 ° C.

The invention has the further advantage that a crimping effect on the thread entry. Through a particularly advantageous development of the invention, at which is the thread within the false twist zone with a thread pull is applied, which is equal to or larger than that for plastic deformation required tensile force, the ripple effect is increased so that a Carpet yarn can be made. In particular, threads made of polyester with sufficient bulk and crimp for carpet production getting produced. The manufactured by the inventive method Carpet yarn is characterized by very good curl resistance.

To set the drawing tension defined within the false twist zone can, the method variant is particularly advantageous, in which the False twist zone arranged between a trigger godet and a stretch godet is.

The method variant for introducing the false twist in the thread is at which the false twist through one essentially across the thread acting air flow is generated, particularly advantageous. Through the air flow the load on the thread is minimized. In addition, the air flow with a Speed are generated, the very high turns on the thread adjust so that even at a spinning speed of, for example, 3,000 m / min a crimped thread with carpet yarn quality is produced.

In a particularly preferred method variant, the air flow becomes Generation of the false twist also used to cool the thread. For this the air flow is directed against the thread running direction and flows into a pre the swirl nozzle arranged cooling tube.  

In the method according to the invention, however, the false twist in the thread also be generated by aggregates that are relative to the thread create a twist on the moving friction surface on the thread. This process variant has the advantage that a thread with evenly reproducible twist will be produced.

To produce a drawn thread, the process variant is according to Claim 9 can be used advantageously. Here, the thread after leaving the Spinning zone stretched and then led into the false twist zone. Here is particularly advantageous if the thread is drawn through a heated tube or a heating groove is guided and stretched. As a result, the thread already experiences a preheating, so that a subsequent heating within the False twist zone on the hot temperature is possible over a short distance.

In order to be able to wind a tension-free thread on the bobbin if possible, the method variant according to claim 11 is suitable. Here, the The thread has a tendency to shrink before being wound up Reduced heat treatment. Especially with polyamide threads as well as with Polypropylene threads can be used to create uniform bobbin structures.

To carry out the method, the device according to the invention has a Heater and a cooler within the false twist zone on the are arranged one behind the other in the thread course. This will make the thread run smoothly generated. The false twist generated in the thread can go unimpeded to the entrance of the Run the heater back in the thread. This ensures that the entangled strands of filament on the thread for fixation required hot temperature to be heated.

In order not to hinder the twist within the thread, the heater is preferably carried out with an elongated heating surface, along  which the thread is guided essentially without contact. The The heating surface can be heated to a temperature in the range of 300 to 600 ° C is. This means that the spinning speeds in the range of 3,000 m / min the thread over a short distance to that required for the process Be heated to hot temperature.

The inventive device according to claim 14 is characterized from that the filament strands within the spinning zone with predetermined Orientation to be put together into a thread, then in to get the false twist zone. Because in particular the physical Properties of the thread due to the molecular structure of the filament strands is specified, a thread with a uniform draw-off and uniform quality.

The advantageous development of the device according to the invention Claim 15 allows the thread tension to be adjusted within the False twist zone.

To enable a particularly gentle thread treatment, the Device according to claim 16 particularly suitable to prevent a false twist To create thread.

This is particularly advantageous if the device according to claim 17 is performed. It can be used to generate the false twist Use air flow to cool the thread at the same time. The airflow will for this purpose, against the thread running direction along a cooling tube, which from Thread is passed.

The further development of the device according to FIG Claim 18. The method according to the invention can thus be small Energy expenditure can be operated.  

In the particularly preferred embodiment variant of the device according to Claim 19 produces an extremely even false twist on the thread. By the formation of the friction pairing of a friction disc and a belt Avoid overstressing the thread.

The device is particularly suitable for working on several threads simultaneously to generate a false twist. For this purpose, the friction disc on the circumference several friction points, each with an attached belt drive. In every A thread runs in the friction point, creating a false twist.

Further advantageous developments of the invention are in the subclaims Are defined.

The process and further process modifications are based on the Parts of the device for carrying out the method with reference to the attached drawings described in more detail.

Show it:

Figure 1 shows a first embodiment of an apparatus according to the invention for producing an endless thread.

Fig. 2 shows another embodiment of the device according to the invention;

FIG. 3 shows an embodiment of a false twist path of an apparatus according to the invention;

FIGS. 4 and 5, a further embodiment of a false twisting path;

Fig. 6 is a drawing device of a device according to the invention.

In Fig. 1, a first embodiment of a device according to the invention is shown schematically. In order to produce an endless thread, the device has a spinning device 1 , a false twist section 2 arranged downstream of the spinning device 1 and a winding device 3 provided for winding the thread.

In the spinning device 1 , a thread 17 is spun from a thermoplastic polymer melt. The thermoplastic material is fed to an extruder 4 through a filling device 6 . The extruder 4 is driven by a drive 5 . The thermoplastic material is melted in the extruder 4 . The melt stream reaches a heated spinning head 8 through a melt line 7 . A spinneret 9 is located on the underside of the spinning head 8 . The polymer melt emerges from the spinneret 9 in the form of fine filament strands 10 . The filament strands 10 pass through a cooling shaft 11 arranged below the spinneret. In the cooling shaft 11 , the filaments are cooled by an air stream. The air flow can - as shown in FIG. 1 - be generated by blowing transversely or radially to the filament sheet or by a suction device arranged at the outlet of the cooling shaft 11 . A preparation device 12 is arranged directly below the cooling shaft 11 , which leads into a thread 17 in the filament strands.

The thread 17 is drawn off from the spinning zone by a take-off godet 13 . The godet 13 forms a unit with a folded arranged on the godet roll 13 guide roll 24th The unit is wrapped several times by the thread 17 . The take-off godet 13 is driven by a godet drive at a presettable speed. This Abzugge speed is many times higher than the natural exit speed of the filaments 10 from the spinneret 9th The overflow roller 24 is freely rotatable.

The thread reaches the false twist section 2 from the take-off godet 13 . Here, the thread 17 first meets a heating device 14 . Within the heating device 14 , the thread is heated to a hot temperature for fixing a false twist, which is generated in the thread 17 at the end of the false twist section 2 by a false twist unit 16 . The heater 14 is preferably designed as a contactless heater, ie the thread is heated without substantial contact with a heating surface. For this purpose, the thread is guided at a distance along an elongated heating surface. The heating surface is advantageously tempered at a temperature in the range of over 300 ° C. In order to keep the thread at a distance, it is possible to arrange individual thread guides within the heating device.

However, it is also possible to design the heating device as a contact heater, in which the thread is guided in contact with a heated surface. The heated surface could be a heating pipe, to what extent the Thread would be helical. The heating tube would then be on the inside Heated temperature, which is in the range of the hot temperature.

After the thread has passed through the heating device 14 , the thread hits a cooling device 15 arranged behind the heating device. In the cooling device 15 , the thread is cooled to a cold temperature in the range from 50 to 120 ° C. The cooling device 15 is preferably designed as a contact cooler, in which the thread is guided over a cooled surface. The elongated, cooled surface could in this case be formed by a cooling rail or a cooling tube, the cooling surfaces of which are kept at a cooling temperature by means of a cooling medium.

However, it is also possible to design the cooling device such that the Thread is cooled to a cooling surface without substantial contact. Here For example, a cold air stream can be generated within a cooling tube, which flows against the direction of the thread. The thread now becomes essentially guided through the cooling tube without contact. This results in cooling.  

At the end of the false twist section 2 , a false twist unit 16 is arranged. The false twist unit creates a false twist in the thread. For this purpose, the false twist unit can be designed, for example, as a swirl nozzle, in which an air stream is introduced tangentially into a thread channel substantially transversely to the thread, so that a rotating flow leads to a twisting of the thread. To increase the swirl effect, several nozzle channels can be provided within the swirl nozzle, which open tangentially into the thread channel.

The thread 17 is withdrawn from the false twist zone by means of a stretch godet 18 . The stretching godet 18 is combined with an overflow roller 25 to form a unit which is wrapped several times by the thread. The stretch godet 18 is driven at a speed greater than the speed of the take-off godet. A defined thread tension on the thread within the false twist zone can thus be set via the ratio of the speeds to one another. The thread 17 is withdrawn from the draw godet by means of the winding device 3 and enters a winding zone via a head thread guide 52 . The thread 17 passes from the head thread guide 52 into the traversing triangle and the traversing device 21 arranged at the end of the traversing triangle. The traversing device 21 can be designed as wing traversing or as reverse thread traversing. In both cases, the thread 17 is guided back and forth within a traversing stroke by means of traversing thread guides. The thread loops around a pressure roller 22 arranged in the thread path behind the traversing device. The pressure roller 22 lies on the surface of the coil 20 to be wound. It is used to measure the surface speed of the coil 20 . The coil 20 is formed on a sleeve which is clamped on the winding spindle 19 . The winding spindle 19 is driven by a spindle motor 23 . The spindle motor 23 is controlled in such a way that the surface speed of the coil 20 remains constant. For this purpose, the speed of the freely rotatable pressure roller 22 is scanned as a controlled variable.

The device shown in Fig. 1 is particularly suitable for producing crimped threads. In FIG. 1 for this purpose, the course is shown of a thread. In practice, however, such devices have a number of spinning positions next to one another, in which a plurality of threads are produced simultaneously in parallel. The threads are wound into a bobbin. The winding speed is in the range of 3,000 to 6,000 m / min.

In FIG. 2, a further embodiment of an inventive apparatus for carrying out a further process variant is shown of the inventive method. Compared to the device shown in FIG. 1, in the device shown in FIG. 2, a stretching device 26 is arranged in front of the false twist section 2 and a relaxation device 29 in the thread path behind the false twist section 2 . The spinning device 1 , the false twist section 2 and the winding device 3 are constructed identically to the device parts described in FIG. 1 in the device shown in FIG. 2. In this regard, reference is made to the description of FIG. 1.

The stretching device 26 is arranged between the spinning device 1 and the false twist section 2 . The stretching device here consists of a take-off godet unit 27 and a stretch godet unit 28 . Both godet units 27 and 28 are each formed by a driven godet and a freely rotatable overflow roller, which are wrapped several times by the thread. The godet of the take-off godet unit 27 is heated, so that the thread 17 drawn off from the spinning zone is heated during the winding of the godet. The thread passes from the take-off godet unit 27 to the stretch godet unit 28 . The godet of the stretch godet unit 28 is driven at a higher speed than the withdrawal godet unit 27 described above. This will stretch the thread between the two godet units. The godet of the stretch godet unit 28 can also be made heatable. The thread is conveyed into the false twist section 2 by the stretch godet unit 28 .

The stretching device 26 shown in FIG. 2 is an example. The stretching device 26 can also be formed from a combination of godets and heating devices. For example, the stretching device could have a heating tube, as shown in FIG. 6. Here, the thread 17 is guided directly behind the spinning zone into a heating tube 32 . The thread 17 is withdrawn from the spinning zone by the godet 33 arranged below the heating tube 32 and passed through the heating tube 32 . The thread passes through the heating tube 32 without contact. The heating tube 32 is heated from the outside, so that a stretching point can form in the thread 17 within the heating tube. The thread 17 is stretched. In order to support the stretching process, it is also possible to generate an air flow in the heating tube 32 which flows against the direction of the thread. This increases the frictional forces acting on the thread. In such a method variant, for example, the air could not be heated, but the heating tube.

The thread 17 is conveyed from the drawing zone via the godet 34 and guided into the false twist path. In order to avoid that the false twist of the false twist runs back haul to the stretching device 26 is arranged a swirl stopper 35 between the false twisting path and the drawing device 26th The swirl stopper 35 would thus have to be arranged directly in front of the heater input in the arrangement shown in FIG. 2.

In FIG. 2, a relaxation device 29 is arranged behind the false twist section 2 for aftertreatment of the thread 17 . The relaxation device 29 consists of a hot godet unit 30 and a godet unit 31 . The hot godet unit 30 has a heated godet which is wrapped several times by the thread. The downstream godet of the godet unit 31 is cold; it could also be heated in order to achieve a more intensive thermal aftertreatment of the thread. The hot godet unit 30 and the godet unit 31 are driven at substantially the same speed. This means that the thread can be guided in the post-treatment zone with very low thread tension.

In order to be able to wind a twist-free thread on the spool, a further method variant within the relaxation device Swirling nozzle arranged, which causes swirling of the thread. In addition, the thread closure of the thread is reinforced.

The relaxation device shown in FIG. 2 is exemplary. For the thermal treatment of the thread, a heating device can be arranged between two godet units. The godet units are preferably not heated.

In the exemplary embodiment according to FIG. 2, a thread is spun and stretched by the stretching device 26 . The take-off godet unit 27 pulls the thread from the spinneret 9 at a speed of approximately 3,000 m / min. The thread is heated by the take-off godet and then stretched between the take-off godet unit 27 and the stretch godet unit 28 . After drawing, the thread enters false twist section 2 . Here, the thread is first heated in the heating device 14 in a twisted state to a temperature of over 200 ° C. The entanglement of the filament strands in the thread 17 is fixed and then frozen in the downstream cooling device 15 . The thread thus has a very stable thread closure that is not released behind the false twist unit 16 in the untwisted state. In order to set a thread tensile force required for the false twist treatment, the hot godet unit 30 of the subsequent relaxation device is operated at a somewhat greater peripheral speed than the stretch godet unit 28 . This increases the ripple effect in the thread. The subsequent relaxation treatment significantly reduces shrinkage in the thread. As a result, the thread can be wound into a bobbin with a low winding tension. The curling effect in this process is so pronounced that subsequent texturing can be omitted in a subsequent process. This process can be used in particular for the production of carpet yarns.

FIG. 3 shows an embodiment of a false twist device, as can be used, for example, in a spinning system according to FIG. 1 or FIG. 2. Here, the false twist path between the false twist unit 16 and the twist stopper 35 is formed. A heating device 14 and a cooling device 15 are arranged within the false twist section. The false twist assembly 16 arranged at the end of the false twist section is designed as a pneumatic twist nozzle 42 . The false twist nozzle 42 has an elongated thread channel 44 oriented in the thread running direction. The thread 17 is guided in this thread channel without contact. A nozzle channel 43 arranged transversely to the thread running direction opens into the thread channel 44 essentially tangentially. The nozzle channel 43 is connected to a compressed air source 40 . An acute angle is formed between the thread channel 44 and the nozzle channel 43 of the swirl nozzle 42 , so that an air flow introduced into the thread channel 44 through the nozzle channel 43 has a flow component against the direction of the thread. The thread 17 is twisted by the air flow flowing tangentially into the thread channel 44 .

In the arrangement shown in FIG. 3, the swirl nozzle 42 is arranged directly at the outlet of a cooling pipe 39 of the cooling device 15 . As a result, the air flow from the swirl nozzle 42 enters the cooling tube 39 and leads to a swirl-supporting effect within the cooling tube 39 . In addition, the air flow is used to cool the thread. The cooling tube 39 could additionally be cooled from the outside, so that the air flowing in the cooling tube 39 can be kept at a cooling temperature. In the entrance area of the cooling pipe 39 , a suction chamber is provided which is connected to a compressed air source 40 in such a way that the air flow is sucked out of the cooling pipe 39 and the suction chamber 38 . The pressure source 40 , which can be designed as a blower, for example, then generates a compressed air flow which is passed via a cooler 41 to the swirl nozzle 42 . This arrangement is suitable, for example, to generate a false twist in the thread at a thread speed of 4,000 m / min, at which approximately 2,000 rpm occur.

To fix the false twist in the thread, the thread 17 is guided through a heating device 14 upstream of the cooling device 15 . For this purpose, the heating device 14 has two heating surfaces 36 , which form a heating groove 37 . The thread is guided without contact in this heating groove. The heating surfaces are heated to a temperature above the melting temperature of the thread. Temperatures of 500 ° C. are preferably reached in the heating surface. The thread 17 can thus be heated to a hot temperature which is above the glass transition temperature of the polymer. For example, an optimal fixing temperature is reached at approx. 200 ° C with a polyester thread.

Another embodiment of a false twist device is shown schematically in FIGS . 4 and 5. This false twist device has a false twist unit 16 , which is suitable for several threads. The false twist unit 16 consists of a friction disk 45 . The friction disc 45 is arranged in a plane transverse to the thread running direction and is driven in rotation by a drive, not shown here. A friction surface 47 is thus formed on the circumference of the friction disk 45 and has a tangentially directed movement component with respect to the thread. The thread 17 is now guided past the friction surface 47 of the friction disk 45 in a friction point 51 . To generate a false twist, a belt drive 46 is arranged in the friction point. The belt drive 46 consists of two rollers 48 and 49 and a belt 50 guided around the rollers. At least one of the rollers 48 or 49 is driven such that the belt performs a movement that is opposite to the movement of the friction disc. The belt drive 46 is arranged on the circumference of the friction disc 45 in such a way that the belt 50 and the friction surface 47 of the friction disc 45 clamp the thread 17 in the friction point 51 . A twist in the thread 17 is now generated by the movement of the friction disk 45 and the belt drive 46 . The belt running plane is arranged inclined to the friction disk by a twist angle.

A total of four belt drives are provided on the circumference of the friction disk 45 , as shown in FIGS. 4 and 5. A friction point 51 is formed between each belt drive 46.1 to 46.4 and the friction disk 45 , in which a thread is twisted. The false twist generated in the thread runs back to the take-off godet 13 in the thread. Here, the false twist is fixed in the heating device 14 and frozen in the cooling device 15 . The threads are withdrawn from the false twist path by means of the stretching godet 18 and each lead to a winding point. The thread is wound into a bobbin 20 in each of the winding stations. The coils 20.1 to 20.4 are placed one behind the other on a projecting winding spindle 19 . The winding spindle 19 is driven by means of the spindle drive 23 . The winding point is constructed here - as already described for FIG. 1. The traversing device and the pressure roller have been omitted due to the clarity.

The false twist device shown in FIG. 4 can easily be used in a device as described in FIG. 1 or 2.

Reference list

1

Spinning device

2nd

False twist

3rd

Take-up device

4th

Extruder

5

drive

6

Filling device

7

Melting line

8th

Spinning head

9

Spinneret

10th

Filament strands

11

Cooling shaft

12th

Preparation device

13

Deduction godets

14

Heater

15

Cooler

16

False twist unit

17th

thread

18th

Extension godet

19th

Winding spindle

20th

Kitchen sink

21

Traversing device

22

Pressure roller

23

Spindle drive

24th

Overflow roller

25th

Overflow roller

26

Stretching device

27

Discharge godet unit

28

Stretch godet unit

29

Relaxation facility

30th

Hot godet unit

31

Godet unit

32

Heating pipe

33

Godet

34

Godet

35

Swirl stopper

36

Heating surface

37

Heating groove

38

Suction chamber

39

Cooling pipe

40

Compressed air source

41

cooler

42

Swirl nozzle

43

Nozzle channel

44

Thread channel

45

Friction disc

46

Belt drive

47

Friction surface

48

role

49

role

50

belt

51

Friction point

52

Head thread guide

Claims (24)

1. A process for producing an endless thread from a synthetic polymer melt, in which a plurality of filament strands are extruded and cooled in a spinning zone from the polymer melt and in which the filament strands are combined to form the thread and wound into a bobbin, before being wound up in a false twist is created for the thread to entangle the filament strands, characterized in that the thread with the false twist is heated within a false twist zone to a hot temperature above the glass transition temperature of the polymer and is then immediately cooled to a cold temperature below the hot temperature. 2. The method according to claim 1, characterized in that the hot temperature of the thread is in the range from 150 ° C to 250 ° C. 3. The method according to claim 1 or 2, characterized in that the cold temperature of the thread is in the range from 50 ° C to 120 ° C. 4. The method according to any one of claims 1 to 3, characterized in that the thread within the false twist zone with a thread pull is applied, which is equal to or larger than that for plastic deformation required pulling force. 5. The method according to claim 4, characterized in that the Thread tensile force by a arranged in the thread run in front of the false twist zone Trigger godet and one in the thread run behind the false twist zone arranged stretch godet is generated.   6. The method according to any one of the preceding claims, characterized records that the false twist in the thread through a substantially transverse air flow acting on the thread is generated. 7. The method according to claim 6, characterized in that the air flow has a cooling temperature to the thread to the cold temperature cool. 8. The method according to any one of claims 1 to 5, characterized in that the false twist in the thread by at least one contacting the thread Friction surface of a swirl generator is generated. 9. The method according to any one of the preceding claims, characterized records that the thread after leaving the spinning zone and before entering the false twist zone is partially stretched. 10. The method according to claim 9, characterized in that the thread through an elongated heating zone in the form of a narrow heating pipe or narrow heating groove is guided and stretched without contact. 11. The method according to any one of the preceding claims, characterized shows that the thread after leaving the false twist zone and before Heat up to reduce the tendency to shrink receives treatment. 12. An apparatus for producing an endless thread ( 17 ) from a synthetic polymer melt with a spinning device ( 1 ) for extruding and cooling a plurality of filament strands ( 10 ) which are brought together to form the thread ( 17 ) at the end of the spinning device ( 1 ), with a winding device ( 3 ) for winding the thread ( 17 ) into a bobbin ( 20 ) and with a false twist unit ( 16 ) arranged between the spinning device ( 1 ) and the winding device ( 3 ) for generating a false twist in the thread ( 17 ), thereby characterized in that a heating device ( 14 ) and a cooling device ( 15 ) for thermal treatment of the thread ( 17 ) are arranged one behind the other between the spinning device ( 1 ) and the false twist unit ( 16 ) within a false twist section ( 2 ) traversed by the thread with the false twist. 13. The apparatus according to claim 12, characterized in that the heating device ( 14 ) has an elongated heating surface ( 36 ), along which the thread ( 17 ) is guided essentially without contact with a small distance. 14. The apparatus according to claim 12 or 13, characterized in that the false twist path ( 2 ) is preceded by a take-off godet ( 13 ) which pulls the thread from the spinning device ( 1 ). 15. The apparatus according to claim 14, characterized in that a stretch godet ( 18 ) is arranged in the thread run behind the false twist unit ( 16 ) and cooperates with the take-off godet ( 13 ) in such a way that a thread pulling force ( 17 ) on the false twist path ( 2 ) Thread acts. 16. Device according to one of claims 12 to 15, characterized in that the false twist unit ( 16 ) is a pneumatic swirl nozzle ( 42 ) having at least one nozzle channel ( 43 ) which opens tangentially into a thread channel ( 44 ) passing through the thread and is connected to a compressed air source ( 40 ). 17. The apparatus according to claim 16, characterized in that the cooling device has a cooling tube ( 39 ) which is passed through by the thread ( 17 ) substantially without contact and that the swirl nozzle ( 42 ) at the outlet of the cooling tube ( 39 ) of the cooling device ( 15 ) is arranged such that the air flow entering the thread channel ( 44 ) flows against the thread running direction along the cooling tube ( 39 ) for cooling the thread. 18. The apparatus according to claim 17, characterized in that the swirl nozzle ( 42 ) with the cooling tube ( 39 ), with a compressed air source ( 40 ) and with a heat exchanger ( 41 ) of the cooling device in a cooling air circuit is closed, wherein a cold air flow Swirl nozzle ( 42 ) is supplied. 19. The device according to one of claims 12 to 18, characterized in that the false twist unit ( 16 ) by a rotating friction disc ( 45 ) and at least one circumferential belt drive ( 46 ) is formed, that the friction disc ( 45 ) in a plane transverse to the thread running direction is arranged so that the thread ( 17 ) contacts the friction disc on the circumference in a friction point ( 51 ), and that the belt ( 50 ) of the belt drive ( 46 ) the thread ( 17 ) on the side opposite the friction disc in the friction point ( 51 ) contacted, the belt plane of the belt drive being inclined by a swirl angle with respect to the friction disk. 20. The apparatus according to claim 19, characterized in that the friction disc ( 45 ) has a plurality of friction points ( 51 ) on the circumference, each with an adjacent belt drive ( 46 ) in order to simultaneously generate a false twist in several threads. 21. Device according to one of claims 12 to 20, characterized in that a stretching device ( 26 ) for partially stretching the thread ( 17 ) is arranged in the thread path before the false twist path ( 2 ). 22. The apparatus according to claim 21, characterized in that the Ver stretching device ( 26 ) is formed by an externally heated, the thread ( 17 ) enclosing heating tube ( 32 ), in which the thread is guided and stretched without contact. 23. The device according to claim 22, characterized in that in the heating tube ( 32 ) an air flow flowing counter to the thread running direction can be generated. 24. Device according to one of claims 12 to 23, characterized in that a relaxation device ( 29 ) for shrinking treatment of the thread ( 17 ) is arranged between the false twist unit ( 16 ) and the winding device ( 3 ).