DE2039328A1 - Process for the production of crimped yarn with latent building properties - Google Patents

Description

DR.-ING. BY KREISLER DR.-ING. SCHÖNWALD DR.-ING. TH. MEYER DR. FUES DIPL-CHEM. ALEK VON KREJSLER DIPL.-CliEM. CAROLA KEILER DR.-ING. KLÖPSCH

COLOGNE 1, DEICHAAANNHAUS

Cologne, August 4th, 1970 Ke / Ax

FIBER INDUSTRY S, INC. Charlotte, North Carolina (V .S t. A. ·) -.

Process for the production of crimps, Yarn with latent building properties

The invention relates to the production of crimped yarn, the latent bulking characteristics has, in particular, produced crimped yarn under conditions conducive to improved uniformity the building properties and colorability in the end product. In particular, the invention is applicable to carpet yarns, specially directed nylon carpet yarns, but also come other yarns and other uses are in question, as will emerge from the following description.

Numerous methods have been proposed for the manufacture of crimped yarns. Many of these processes result in high quality yarns which can be used without difficulty for numerous purposes. In the manufacture of carpet yarns and certain woven yarns, where a large number of threads or packages go into a single carpet or fabric web, the uniformity of Package to package and thread to thread must be extremely good to make the thread suitable for piece dyeing of the final product. Yarns that do not have the required evenness must be pack-dyed, and the color shades of the yarn must be

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can be matched to the desired evenness of the stained space before making the final product. As in most cases preferably first the end product, e.g. the carpet, is produced and the end product is then dyed as a whole Yarns that do not have the required level of conformity have, viewed as inferior.

The subject of the invention is a method which makes it possible to reduce yarn errors to a minimum by reducing the fluctuations in the yarn tension and in many cases to eliminate them. In the method according to the invention, the. Accurately controlled "process history ^'1 of the yarn from the draw stage through the curling to the final winding of the yarn', regulated so that the stresses to which the yarn is subjected to in such a manner v / ground that SpannungP3Chwankungen be kept at an absolute minimum.

The invention also relates to a device for generating tension in the yarn and an overall process apparatus for the production and regulation of the necessary and in the course of the yarn production and processing changing tensions in the yarn from the drawing to the winding of the crimped yarn.

The method according to the invention for producing crimped yarn with latent bulk properties is thereby characterized in that one is a stretched, prestressed multifilament yarn to a crimping zone 'feeds the yarn crimps, the crimped yarn from the crimp zone under a low, substantially constant voltage and withdraws at a substantially uniform rate, the yarn cools, the tension under which the Yarn stands at an essentially constant value increased between 0.03 and 0.8 g / dan and hi-? r ° Surch öie Kräuoelun ^ aainplltude or the Krauaelun ^ aüarchmüsser partially iKnd reduces the yarn sur relieving the

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further processing condensed

In another aspect, the invention is directed to a Apparatus for the treatment of the 3 yarn directed that marked is through a yarn drawing device, a Yarn crimping device, a yarn tensioning device and a yarn compacting device, the devices sequentially and cooperatively with one another are arranged, · the yarn drawing device from a Delivery godet and a stretching godet with one there is rods arranged between these godets for stretching the yarn, the crimping device so arranged in relation to the stretching device is that she has the freshly drawn yarn with the absorbs the smallest possible distortion, the Ga-iispannvorrichtung is arranged to receive the freshly crimped yarn from the crimper and tension generated in the yarn and thereby the force of the touch of the Yarn with a further one, consisting of a braked wheel and a deflection roller and one in between Tension compensator increases the existing twine tensioning device, in which the twine from the braked wheel over the Tension equalizer via the take-off roller to the compaction device to be led.

The invention further comprises a used for crimping lasers upsetting crimping device, which consists of an elongated chamber and a delivery device for the chamber, wherein the chamber comprises a fiber processing area and a fiber exit area, the compression area substantially parallel fiber guides in the plane of the supply device and a substantially parallel fiber containment part in a ι plane aüfv / eist, which is offset by 45 to 135 ° from the plane of the supply device, the exit area - a diverging.the fibers enclosing, the friction-reducing part and a corresponding conver-

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yawing, a counterpressure in the fibers generating part in a plane at an angle of 45 to 135 ° to the delivery device and the diverging and converging parts cooperate so that the frictional force of the fibers is transferred from the plane of the delivery device to the plane of the part generating the counterpressure.

In a further aspect, the invention is directed to a compression crimping process characterized in that a fiber bundle is continuously fed into an enclosing chamber, the fiber bundle is crimped, folded and laid to form primary fiber pleats as it is fed to the chamber place against the opposite walls of the chamber, pushing the fibers through the chamber by the mass of continuously fed fibers, thereby creating a pressure by which the fibers are moved through the chamber and a frictional force through the fibers against the opposite walls, the opposite Diverging walls in order to reduce the frictional force of the fibers against these Y / änd, while a counter pressure is exerted on the fibers by allowing a third wall portion of the "ammer to run towards the fibers and thereby the frictional force on the fibers in a direction of 45 to 135 ° to the direction of the primary folds in the fibers increased in the chamber, thereby allowing the unimpeded release of the crimped fibers from the chamber, _o

In the upsetting crimping method according to the invention using a stuffer box, fibers or yarns are used crimped in such a way that the yarn is continuously released from the stuffer box under tension if necessary zero with no sticking or fluctuations in the tensions of the yarn emerging from the stuffer box • can be deducted. In the preferred mode of operation, the yarn is actually extruded from the stuffer box, so that it is possible to use the stuffer box with a

Il

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To operate / operate yarn take-off tension from zero. Of course you can with a small yarn exit tension of, for example about 0 to 0.1, preferably 0 to 0.05 g / den are worked, but it has been found that it is particularly desirable j is to avoid such tensions. The previous compression chambers and modes of operation meant that the Wrinkles in the yarn were jammed on the side walls of the storage chamber, causing the yarn to hang temporarily. Since take-off devices are used in these compression chambers, the yarn tensions fluctuate in the exit parts quickly and without control, due to that periodic temporary catching or pinching of the yarn in its resting against the stuffer box walls suitable folds «The method and apparatus according to the invention enable the elimination of yarn fluctuations by reducing or eliminating the tension, which is necessary »to get the yarn out of the stuffer box to remove. Tension fluctuations therefore do not occur and are not introduced into the yarn in a way that which then the dyeability and other properties of textured! Yarn impaired.

The invention is described below in connection with the figures.

Fig. 1 is a flow diagram illustrating a preferred embodiment of the method according to the invention.

Fig.2 shows on an enlarged scale a preferred, in ■ 'Fig. 1 shown nozzle for generating a pre-tension "

Fig.3 is a section along line 3-3 of Fig.2 and further illustrates a preferred stress-generating nozzle.

Fig. 4 is a voltage trace showing the recorded Indicates tensions of running yarn in the constant tensioning process according to the invention.

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Fig. 5 is a tension trace of recorded tensions of the yarns in the prior art under constant elongation stretching process carried out.

Fig. 6 shows a side view partially cut open an upsetting curling chamber according to the invention.

FIG. 7 is a longitudinal section taken along line 7-7 of FIG. 6.

Figure 8 is an isometric view of a variation of the upsetting curling chamber according to the invention.

In the method illustrated in FIG. 1, the yarn 10 is drawn off from one or more yarn packages 12 by the pinch rollers 14 in order to form a yarn with the desired total denier. The yarn 10 then runs to the delivery godet 16 and via a stretch rod 18 to the stretch godet 20. The stretch godet 20 operates at a higher linear speed than the delivery godet 16, whereby the yarn is entangled on the stretch rod 18 in the desired stretching ratio. This ratio is determined by the relative godet speeds, which are selected as a function of the particular treated yarns and C-th properties desired for the drawn yarn. It is usually about 3: 1 to 6: 3, while for nylon 6,6 a draw ratio of about 3.5 * 1 to 4.5: 1 is preferred.

After drawing, the yarn runs through the crimper. Any known curling processes are suitable, for example the steam-blowing process, which is described in US Pat. No. 3,280,242, and the StaiichkrMusel® ^r , in particular with a storage quay of the type described here.

Preference is given to the upsetting crimping process carried out with a stuffer box, in which the Xräusal rolls 22 feed the yarn 10 to the stuffer box 24, whereby the crimp is fixed in the yarn. The crimped yarn is preferably ejected from the stuffer box 24 or otherwise withdrawn under a low tension of 0 to 0.03 ß / den and passed through a cooling and preheating device 26, which is used to increase the tension of the yarn by narrowing of the course of the yarn and a low slip contact

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of the yarn with a braked godet 28 allows. the Braking effect in the godet 28 inhibits the rotation of this godet relative to the take-off godet 34 and increases the yarn tension further to the desired value from 0.03 to 0.8 g / denier, which is below the tensile force of the yarn. as Device 26 for generating the bias are suitable also pinch rollers or other holding devices that support the Inhibit forward movement of the yarn to such an extent that that the yarn lies against the braked roller 28. The yarn 10 thus runs from the braked godet 28 over the Guide roller 30 and the tension equalizer 32 to the suction godet 34, which exerts a tensile force on the yarn up to exerts desired tension under the tensile force of the Yarn lies. .

A particularly important feature of the invention is the maintenance of a substantially constant pretension, draw tension, a constant tension reducing the crimp diameter, and a constant winding tension that is not significantly sehwaniceri even with fluctuations in the delivery of the yarn between the braked godet 28 and the take-off godets 34 leaves. The tension equalizer 32 is thus preferably a movably attached device which is under Peders tension and which changes the distance between the braked godet 28 and the take-off godet 34 and thereby keeps the tension essentially constant. Suitable as tension compensation means are tension arms, spring-loaded counter rollers or the like, Z ₀ B ₀ tension-controlled roller speeds, to compensate for an applied tension /

The yarn runs from the take-off godet 34 through the compression device 36, with a preferred relaxation, of the yarn in the range of 1 to 1.0j6 of the applied Stretch «is coupled. Come as a compaction agent . Usual twisting o, the substitute for it including air

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swirling or the application of an adhesive in question «At the compression device 36, the yarn is through Liefergaletten.38 of the winding device 40 or directly put to end use »

In the more specific, preferred embodiments of the invention, there is often a slight overfeed of the yarn between the roller godet 20 and the crimper. e.g., in the range of 0.1 to about 3 ^, preferred. One such a slight advance has been found to be particularly advantageous in forming a crimp, which is one particularly results in the desired bulk in the final product.

The crimper used preferably presses the crimped fibers under zero or under tension a very low tension of, for example, 0 to 0.5 g / denier, preferably 0 to 0.01 g / denier. It was found, that by applying a higher tension such as would be required to the yarn actually pulling out of the crimper, fluctuations are introduced into the yarn, which can be increased later in the bulky properties of the yarn and / or in the dyeability of the yarn as stripes, streaks ("worns") or other undesirable errors noticeable do. It is believed that this is due to periodically or irregularly increased voltages are required to pull off the yarn. For this reason, the yarn from the crimper is under Tensions pressed out that are not higher than 0.05 g / don.

Usually that is what comes out of the pucker zone Yarn either as a result of the heat applied to set the crimp or as a result of the in the crimping process, frictional heat or other added heat developed when heated. For example Preferably temperatures of from about 40 to 180 C or above depending on the particular earth Shirring process Developed in the shirring zone. The higher ones

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Temperatures - usually become frizz after Steam blowing process and the lower temperatures during Upsetting crimping method and gear crimping method applied. The yarn is preferably when exiting the Cooled crimping zone.

A particularly advantageous way of cooling the yarn while simultaneously generating the first pre-tension in the yarn; results when the device shown in Pig. 2 and 3 is used. Since the emerging from the curling zone) ■ ' Yarn is preferably under a very low tension) The yarn is preferably pretensioned, ν This has an advantageous effect on the further processing of the yarns in the subsequent tensioning stage. For this the cooling nozzle 42 is preferably used. This cooling nozzle 42 is made up of two opposing side walls 44 formed, in each of which there is a pressure chamber 46 for the distribution of a pressurized gas to outlet openings 48. The exit openings 48 preferably consist of slots or several holes or a combination of slots and holes that are preferably arranged parallel to one another. The outlet openings 48 are on the opposite wall of the cooling nozzle at an angle to the side wall 44 and to the direction of travel of yarn3 aligned. As the yarn passes through the gas stream, the gas impinges on the yarn, thereby inhibiting the advancement of the yarn and that out brings the thread emerging from the nozzle area under tension. To achieve the desired tension, the nozzles are preferably 'at an angle α of about 5 to 70 °, preferably 5 to 45 °, aligned to the side wall 44 or to the direction of travel of the yarn, creating the desired counter pressure and the yarn is pretensioned as it passes through the nozzle. Through the cooling nozzle is thus at the same time the cooling of the yarn and its pre-tension up to a value from 0.003 to about 0.06 g / den, preferably 0.005 to 0.03 g / d'un reached. You can use deodorant yarn for cooling

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use any non-reactive gases. Air is preferred. A special cooling of the air is usually not necessary. The ambient temperature the air is generally suitable.

The exit openings can be arranged to twist the yarn, but they will . _x preferably aligned so that a twisting effect is avoided. The amount of tension under which the yarn is placed during pre-tensioning is determined by the. Regulation of the gas pressure, the angle at which the gas hits the yarn, the flow speed of the yarn, the arrangement of the side walls and the like. It is also desirable to create at least some intermingling of the yarn in order to facilitate further processing of the yarn, which may contain broken or flung threads. With the device described this is easily achieved, particularly at the preferred angles at which the gas impinges and the speeds at which the back pressure is generated.

Air in the cooling nozzle is preferably used as the gas, but any cooling gases such as nitrogen are various Inert gases and the like are suitable. The applied gas pressure depends on the number of existing outlet openings, their shape, their cross-sectional area and the desired degree of prestress. Preferably, the Pressure of the air adjusted to the desired preload.

Various known brake wheels are used as the brake wheel 28, E.g. fluted wheels braked by friction are in question. A brake shoe is particularly preferred Magnetic clutch in which the braking voltage can easily be adjusted to suit the subsequently applied Voltage corresponds. Other devices for friction control, e.g. fluid couplings »eddy current brake !! and the like, can be used with correspondingly good results.

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Between the brake roller 28 and the 'take-off godet. 34 will brought the running yarn under a substantially constant tension. This tension is less than that Tension required to draw the yarn. However, it is sufficient to reduce the crimp in the yarn of the crimp diameter to partially remove without permanent uncrimping of the yarn. Through this Stretching eliminates the synchronism of the curling arcs and introduced a latent effect into the crimp, the easier manufacture of the end product from your yarn as well as improving the training of bulkiness or of the bulge in the end product. The size of the stretching is therefore in the range from about 0.03 to 0.8 g / den, preferably about 0.05 to 0.5 g / den. The voltage equalizer 32 is set at the applied voltage so represents that tension fluctuations caused by periodic or irregular fluctuations in the delivery of the yarn can occur via the brake roller 28, are smoothed «,

An upset pucker according to the invention as set out in Pig. 6, 7 and 8, consists of the supply device, a compression area and an exit area. Feed rollers 22, sometimes referred to as small rollers, serve as the supply device The yarn is crimped and further folded, overlaid and crimped by the feed rollers as & s is fed into the stuffer box. By the feed rollers 22, the yarn is continuously fed into the primary crimp region 17 at the entrance of the stuffer box and compressed therein, creating the primary crimps are formed. the compression chamber 19 is formed by two opposed, referred to as doctor blade 21 side walls in the same plane as the feed rollers 22 and a second pair of opposed Vänden, referred to as the rear wall 29 and Voröerwand 23 *. the rear wall 29 \ and Front wall 23

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form the guide that holds the crimped fibers between the doctor blades 21 against which the crimped yarn is folded and packed. The yarn is folded back and forth in the compression zone and placed against the walls formed by the doctor blades where it is in frictional contact slides along. Secondary crimps are created in the fibers by folding and folding the yarn against the doctor blades. As the yarn is continuously fed to the compression zone, it is pushed down through the chamber. The doctor blades are preferably arranged so that a small primary W divergence is formed of one another, in order to regulate the frictional force comes to act on the yarn, while being pressed by the compression zone.

The divergence, i.e. the degree to which the doctor blades diverge, is about 0.001 to 0.1 cm, preferably about 0.002 to 0.08 cm per cm over the length of the densification zone. The divergence set in each case depends on the respective yarn to be crimped and on which, if applicable the finishing of the yarn made, the thread cross-section and the obtained coefficient of friction between the yarn and the walls. The divergence is chosen so that the "compression force is generated which is required to to fix the crimp in the Kainmer length while at the same time a smooth passage of the yarn plug through the chamber is guaranteed. For endless ITylon carpet yarn a divergence of about 0.002 to 0.01 cm per cm is particularly preferred

The compression zone can be heated to improve the fixation of the crimp, but this is due to the . Friction of the yarn on the opposing walls 21 during continuous work normally provides enough heat to increase the fixation of the crimp so that additional heating is not required, though it can be made.

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The exit zone of the stuffer box is formed by a further secondary divergence 27 of the doctor blade 21. A corresponding convergence of the stabilizer 35 which is secured to the Vorderwanä 23 and / or on the rear wall 29, begins in the Veräichtungszone and provides the means Eur backpressure generation is. Iat The secondary divergence. 'Greater than the primary divergence and is preferably about 0.001 to 0.5 cm, preferably about 0.015 to 0.25 cm per cm over the length of the stuffer box · A particularly preferred secondary divergence is shown in the figure , but the divergence can also be another jform, e.g. have the shape of a double angle.

In a preferred embodiment, a stabilizer groove 31 in the front wall 23 is in the exit zone for the Attachment of the stabilizer 35 provided, which is arranged so that it converges towards the crimped yarn. In the same way, a second stabilizer can optionally be arranged in the rear wall 29 so that it also converges to the yarn in the stuffer box. The stabilizer 35 is machined and attached so that he has a primary converging zone 37 in the stuffer box which in the preferred embodiment then forms "a constant, non-converging zone 39 tapers which the applied convergence in the St auchkaramer maintains. The converging zone 37 of the stabilizer 35 generates the counterpressure applied to the yarn in the stuffer box and is easily adjustable so that the point of the yarn ditch 41, which in turn depends on the counterpressure, on the divergence and convergence zones, can be adjusted. Pure assembly and the adjustment of the stuffer box are manufacturing 3-holes 33 provided.

Y / Uhrend üich CLAA yarn 10 travels through the compression chamber 19, folds ea ^ SiOH ESSTM the Rakelmeaaer 21 and inhibits i! L -daa yarn "through the chamber thereby to

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Curve 43 directed towards the front is formed in the middle of the chamber, the gaps 45 following the curvatures 43 as the yarn passes through the stuffer box. When the yarn reaches the formed by the stabilizer 35 convergence zone 35, causes the back pressure generated by the stabilizer 35 'that the bulges are reversed and 45 obtain the folding, the buckles 43, so that they lie with these essentially in one plane. The crimped yarn can thus be ejected from the compression chamber at the yarn take-off point without collapsing or getting stuck and thus without fluctuating yarn take-off tensions, which normally occur when the yarn is in the stuffer box because the gaps are pressed against the side walls of the stuffer box Keeps hanging. In this way the yarn can be continuously ejected or withdrawn at a substantially constant low tension without periods of sudden tension fluctuations. This is illustrated more clearly in FIG. 4, which shows a tension trace of a yarn withdrawn from the described compression catalog, which can be compared with the tension trace illustrated in FIG appear.

In a preferred embodiment of the device according to the invention, the rear wall 29 and the conveyor wall 23 are preferably separated from the feed rollers 22, whereby sufficient space is created for the unimpeded movement of the yarn fed to the chamber downwards , form the front wall primarily as guides while serve the opposite walls, for example, _{e is} the cable diameter, to au primary EinachließunßS- and Verdichtungazone. Forner the stabilizer 35 preferably rigid in the compound of SLauchkammer niLt attached jodoch it could also so be attached, that a limited flexibility is possible

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is. Of particular importance is the fact that the Stabilizer 35 attached in a plane parallel to the doctor blades 21 and at 45 to 135 ° from the plane of the Doctor blade and feed rollers is offset. In the most preferred embodiment, the stabilizer is in a parallel plane at an angle of SO, e.g. B. in attached at right angles to the doctor blades.

8 shows a further embodiment of the invention, the opposing walls forming the annihilation zone and the guides machined and become one Two-component units are fitted together, whereby a combination of doctor blade and guide 47 is obtained, in which the lip 49 forms the guide and the groove 50 includes the doctor blade. Along the grains from the entrance . And at the feed rollers 22 to the exit end 52 of the Stuffer box expands the hat 50 outwardly while the lip 49 converges inward, creating a chamber is formed which has the functional properties of the in Fig.6 and ', chamber shown. Such chambers although have advantages in terms of simplicity and light weight Reproduction of numerous stuffer boxes with the same tolerances, but the option is a working one Adjust the crimping device, somewhat limited "

The yarn produced with the crimping device according to the invention has a generally sawtooth shape with primary and secondary ripple amplitudes. the The number of crimps per meter can be adjusted by changing the working conditions so that about 200 to 1180, preferably about 315 to 790 crimps / m can be obtained. Similarly, the strand length of the crimped yarn can range from about 30 cm to about 40 cm Can be varied at will.

Any method according to the invention can be made synthetic endless multifilament yarns including

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those made of nylon, polyesters, acrylic polymers, modacrylic polymers, Polypropylene, polyvinyl chloride, polyvinylidene chloride ^ from the products of the trade name "Darvan" and "Spandex" Uodgl. "treated. These yarns can have any fiber titer in the range from about 0.5 to 200 den / thread, but the titer in the textile Range in particular about 0.5 to 10 denier / thread and in the sector of technical yarns and carpet yarns about 8 to 50 denier / thread. The total denier of the yarn can . accordingly vary considerably depending on the particular intended use of the yarn being processed. Of the Total denier for carpet yarn is in the range from about to 5000 den, preferably in the range from about 800 to • 4000 den. Textile yarns expediently have a lower total denier, for example in the range from about 100 to 800 den. Of course, yarns with higher and lower total denier can easily be processed, but according to the invention It is best to manufacture carpet yarns that are particularly sensitive to fluctuations in the Are texturing.

Certain preferred embodiments of the invention are described in the following example.

example

A fiber made of nylon 6,6 (polyhexamethylene adipamide) was processed according to the invention, in particular according to the scheme shown in FIG. 1 and with the apparatus shown there. Undrawn yarn was fed to a drawing device consisting of a draw bar and a draw godet, where it was drawn at a speed of 494 m / min for a total draw ratio of 3.82. ^{The freshly drawn yarn was fed to the c} * 'ise rollers of an upsetting crimping chamber at a delivery speed of 491.6 m / minute. The compression crimping chamber shown in Fi ₁ U ^ - -Λ 7 was ver ■ - -. .u

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A crimped yarn with a generally sawtooth shape Crimps occurred with a temperature of about 80 ° C zero tension from the stuffer box and became passed through the cooling nozzle shown in "Fig. 2 and 3, which worked with an air pressure of 2.1 atmospheres. The angle of incidence of the gas stream on the yarn was

30 ° between the yarn and the axes of the gas outlet openings. This pressure and this angle of impact resulted in a tension of 50 to 75 S ^{in the} yarn. This tension corresponded to about 0.019 to 0.029 g / den. The pre-tensioned yarn from the cooling nozzle ran over a magnetically braked coupling and a sprung tensioning arm to a take-off godet, which brought the running yarn under a tension of 400 g between the coupling godet and the streek godet. This tension corresponded to about 0.154 g / denier. The course of the tension is shown in FIG.

The yarn was relaxed by 5 $ of the tensioned length from the take-off godets 34 / and passed through a yarn entangling nozzle. The yarn was then wound onto a spool as a 66 nylon 6600/136 carpet yarn. This yarn had a hank length of about 36.8 cm and about 59O to 75O crimps / m. The strand length was measured using "meter length raps" and then immersed in water at 60 ^° C. for 3 minutes before the length was determined «

The yarn made by this process became an off Endless threads processed existing carpet, which was stucco-dyed. Examination of the piece-dyed product found that it was practically free from fluctuations in bulk or the bulge and the coloration. This is a sign of the evenness of the yarn from the package to it Package as well as within the package.

The number of crimps per meter and the length of the strand deo produced yarn could be varied. Using a stuffer box, a generally sawtooth shaped crimp from primary and secondary crimp

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amplitudes formed in the yarn. The number of crimps can be set to-about 118 to 1180 / m or more, with about 200 to 790 crimps per meter generally being particularly preferred. Furthermore, the strand length of the crimped yarn of about 25 to 48 cm at will depending on the intended use can be varied by changes in the crimping temperature, post tension, and the like. The preferred range of strand length for carpet yarns of this type is about 28 to 38 cm.

In the same manner other crimping can, for example _o the gear crimping or stuffer box crimping of Dampfstrahlkräuselung instead be used, with similar results. The specific type of crimping changes with the crimping process used.

The invention has been particularly described in connection with nylon, but results have been obtained accordingly also obtained with the other synthetic filaments mentioned. Furthermore, threads with higher or smaller total titer and titer per thread can be processed with correspondingly good results.

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Claims (1)

P a te nt to s ρ r ü c he . 1) Process for the production of crimped yarn with latent ..- “. Construction properties, characterized in that a drawn, pre-tensioned multifilament yarn in feeds a crimping zone, the yarn crimps, eic = crimped yarn from the crimp zone under a low, substantially constant tension takes off at a substantially uniform speed, the yarn cools, the tension of the yarn a substantially constant value between about 0.03 and 0.8 g / den increased and thereby at least partially reduced the crimp diameter .and that Twine compressed to facilitate further processing. 2) Method according to claim i, characterized in that the tensioning means biasing to about 0.003 "to 0.05 g / denier and further retensioning to 0.05-0.8 g / denier. 3) Method according to claim 1, characterized in that a freshly drawn yarn is fed to the crimping zone. 4) Method according to claim 1, characterized in that the cooling of the yarn by inflating one under pressure standing gas is made on the yarn, with additional by the impact of the gas on the yarn e. a tension of the .yarn is generated. . 5) Method according to claim 4, characterized in that the pressurized gas also causes the yarn to be entangled. 6) Method according spoke 1, characterized in that an endless multi-thread carpet yarn is treated " 109 8 15/2 0 12 2 U 3 y 3 ν 8 7) Method according to claim 6, characterized in that that a polyamide yarn is processed. 8) Method according to claim 1, characterized in that the yarn withdrawn from the crimping zone under a tension of less than about 0.01 g / den will. 9) Method according to claim 1 "to 8, characterized in that that the compression after tensioning by turbulence with an inflated on the gas, under Pressurized gas occurs while the yarn is in an enclosed zone » 10) Method according to claim 1 to 8, characterized in that the compression is carried out by Zv / irnen . 11) Method according to claim 1 to 10, characterized in that the crimping is carried out in a stuffer box after the upsetting crimping process. 12) Method according to claim 1 to 10, characterized in that the crimping according to the steam blowing process is made. 15) Method according to claim 1 to 10, characterized in that the crimping according to the gear crimping method is made. 14) The method of claim 1 to 13, characterized in that the compression of the yarn is carried out while the stretched yarn is relaxed by 1 to ^ ^ ^Ό ί. 15) Method according to claim 1 to 11, characterized in that one feeds a fiber bundle continuously into an enclosing Kavr.iur, crimps the pas bundle at el ^ r feed to the chamber, folds and so 109815/2012 2U39328 specifies that primary fiber folds are formed which extend against the opposing walls of the chamber lay the fibers through the cash register continuously The fed fibers are pushed through the chamber, thereby creating a pressure through which the fibers pass through the chamber are moved, and a frictional force is generated by the fibers against the opposing walls, the opposing ones Walls diverge to reduce the frictional force of the fibers against these walls while putting a back pressure on the fibers exerts by allowing a third wall portion of the chamber to run towards the fibers and thereby the frictional force on the fibers in a direction of 45 to 155 ° to the direction of the primary folds in the Fibers in the chamber increased, making the unobstructed Releasing the crimped fibers from the. Chamber allows will. '■ 16) Method according to claim .15, characterized in that endless threads are used as the fiber bundle. 17) method according to claim 15, characterized in that that the curled fibers are expelled from the chamber will. 18) Method according to claim 16, characterized in that that als.Bündel of endless threads a carpet yarn is used" 19) Device for performing the method according to claim 1, characterized by yarn stretching means (18,20), yarn crimping means (22,24), yarn tensioning means and Garnveräichtunssmlttel (36), wherein the parts of the Device consecutively and with one another • are arranged so as to work the yarn, the yarn stretching · ' means of a supply godet (16) and a stretch godet (20) with a godet between these to the VarstreokÜrig of the yarn (10) arranged Streok- 109815/2012 rod (18) consists of the crimping device (22,2'4) relative to the stretching device (16,13,20) is arranged so that it takes the freshly drawn yarn with the smallest possible draft that Garnsparmmittel is arranged so that it is fresh crimped yarn from crimper (22,24) receives and with the help of a braking roller (28) and a suction godet (34) with an interposed The tension equalizer (32) brings the twine under tension, whereby the twine is released from the braked roller (28) via the tension equalizer (32) and the godet. (34) runs to the compression device (36). 20) Device according to claim 19, characterized in that that the tension-generating part is a bias generating part in the form of an air cooling nozzle (42) which is arranged so that it generates a jet of air directed against the running yarn. 21) Device for performing the method according to claim 4, characterized in that the gas nozzle consists of two spaced apart from each other, opposite walls (44), in each of which a pressure chamber (46) with a gas outlet opening (48) is included, the openings (48) on the Space between the walls and directed sur opposite wall. 22) Device according to claim 21, characterized in that each pressure chamber (46) at least two in parallel has mutually extending outlet openings (48) which lead to the wall (44) which contains the pressure chamber (46), form an angle of about 5 to 70 °. 23) Device according to claim 19, characterized in that the Stauchkräuselkamuier an elongated chamber (19) and a supply rack (22) for the chamber, wherein the chamber (19) has a fiber compression 109815/2012 - 23 - 2Ü39328 Area (17) and a fiber exit area (27), the fiber compression area (17) in the Wes ent borrowed parallel fiber guides (23,29) in the plane of the supply means (22) and a substantially parallel fiber containment means in a plane that extends around 45 The exit area is offset by up to 135 ° from the plane of the delivery means (22). (27) has a diverging, the lines enclosing, the friction-reducing part and a corresponding converging, ^ a counterpressure in the lines generating part r in a plane 45 to 135 to the delivery means (22) and the diverging part and the converging part so cooperate that the frictional force of the pasers is transmitted from the plane of the supply means to the plane of the part generating the counterpressure. 24) Device according to claim 23, characterized in that that the part enclosing the pasers consists of two opposite doctor blades (21) consists. 25) Device according to claim 24 »characterized in that that the doctor blades (21) are arranged so that they have a primary divergence in the compression area (17) and form a secondary, larger divergence in the exit region (27). 26) Device according to claim 23, characterized in that _that the cross-sectional area of the elongated chamber (19) in the compression area (17) and in the outlet area (27) remains approximately constant, while the The shape of the inner circumference of the chamber changed. 27) Device according to claim 23, characterized in that that "the counterpressure generating means is a stabilizer (35) which is in a plane at right angles sum containment means is arranged in the access area (27). · 109815/2012