DE2124886A1 - Crimped carpet yarns and methods of making them - Google Patents

Description

PATENT LAWYERS

DR.-ING. BY KREiSLER DR.-ING. SCHÖNWALü D R.-ING. TH. MEYER DR. FUES DIP L.-CK EM, ALEK VON KREJSLER DIPL-CHEM. CAROLA KELLER DR.-ING. KLÖP5CH

Dipl.-Ing.Salting

KDLNI ₇ DEICHMANNHAUs

Cologne, the lS. May 1971 Ke / Ki

Pi ber Industries, Inc., Charlotte, -North Carolina, ILS.A.

Ruffled carpet yarns and methods of making them

The invention relates to the manufacture of crimped yarn with latent pebbles and in particular the production of crimped yarn under conditions conducive to an improved evenness of the building properties and colorability combined with improved body and covering power in the end product. In particular, the inven-> application directed to carpet yarns, especially polyamide carpet yarns, although other yarns and uses as well can come into question.

There are already numerous for the production of crimped yarns Procedure has been described. Many of these processes result in high quality yarn that can be used without difficulty for numerous Purposes. In the manufacture of carpet yarns and certain G-iweave games where one large numbers of threads or packages go into a single carpet or fabric web, however, uniformity must be maintained from package to package and from thread to thread to be extremely good in order to obtain a thread that is suitable for the Piece dyeing of the end products is suitable. Yarns that do not have the required uniformity must be pack-dyed and the shades of the yarn must match each other

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must be adjusted in order to obtain the desired uniformity of the colored surface prior to the manufacture of the final product. Since in most cases preferably first dr-.r, final product, such as a carpet, manufactured and diis end product is then dyed in its entirety, v / ground yarns which do not possess the required Gleichmäßigkeitsgrsd, considered inferior. In addition, it is particularly desirable that the yarn have high bulk and coverage as the crimp is developed in the final product, thereby reducing tuft and / or stitch uniformity and allowing the use of light weight yarns on the face of the fabrics .

The present invention was based on the object Yarn both with high volume and coverage as well as evenness from package to package and within the package and at the same time a method for the thread damage can be reduced and in some cases even completely eliminated by defusing the Crimping Conditions Used in Crimping. In the process according to the invention, the "process history" of the yarn from the drawing stage to the The crimping stage is precisely regulated up to the final winding of the yarn, thus reducing the tension to which the yarn is subjected will be regulated in such a way that Voltage fluctuations are kept to an absolute minimum.

The solution to the problem of the invention is a method for Production of crimped yarn with latent bulky shanks, that consists in the fact that a freshly drawn multi-filament yarn is heated to temperatures in the range between heated about 80 ° and 16.0 ° C, this heated yarn is introduced into a crimping zone and crimped, the crimped Yarn under a low, substantially constant tension and with a substantially uniform consistency

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speed is withdrawn from the crimp zone, the yarn cools, the tension of the yarn to a substantial extent constant V.'ert between O.OO3 and 0.5 g / den increased below at least a partial reduction in the crimp diameter and finally the yarn is compacted to facilitate further processing.

According to a further improvement, a synthetic crimped polymer thread is produced which has a multiplicity of crimps isolated from one another in the bulked state, which is characterized by the parameters of an uncrimped frequency in the range of 4 to 16 crimps / inch , by 22 to 50 % crimps and by a crimp frequency in the range of about 5 to 32 crimps / inch, the overall shrinkage of the thread, as determined on the unluffed crimped thread, being 20 to 10 % . This thread has a high degree of sustained uniformity along its linear length as determined from a substantially constant V.'ert of each parameter and a significant absence of visible thread imperfections in a dyed carpet made from a multitude of these threads has been.

Characteristic curl structures can still be reproduced are described by the region A of the crimped fiber in which a sinusoidal crimp is called

α ₌

7 [shows the percentage of crimps and rn shows the frequency in the uncrimped state. The area A of a serrated curl can be defined as

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fy (ι ~

2m ²

where ^ and m have the meaning mentioned. For one helical crimp can make the crimp structure best represented as volume V, which is defined as ■

16 TTm

where in turn 77 and m have the meaning given.

The invention. Is described below in connection with Illustrations explained in more detail.

Figure 1 is a flow diagram illustrating a preferred embodiment of the method according to the invention; Fig. 2 is a graphical one. Representation of the parameters of the preferred sawtooth crimped thread according to the invention,

In the method shown in Fig. 1, the yarn of one or more yarn packages 12 through the clamping

14 - "

roll peeled off to make a yarn with the desired total titre to build. The yarn 10 then runs to the delivery roller and via a stretch rod 18 to the stretching roller 20. The Draw roll 20 operates at a higher linear speed than the delivery roller l6, whereby the stretching of the yarn is carried out on the stretch rod 18 in the desired stretching ratio. This ratio will determined by the relative roller speeds, which in

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Depending on the yarns treated and the properties desired for the drawn yarn. Typically the draw ratio will be in the range of about J>: 1 to 6: 1, while for nylon-6,6 a draw ratio of about 3.5: 1 to 4.5: 1 is preferred.

The yarn 10 then moves towards the draw zone ■ the crimping device. These can be any of the numerous be known crimping devices that cause isolated crimps, for example by the Upsetting crimping, blade crimping, palsch wire crimping, gear crimping and the like, of which the upset crimping process is preferred. Of simplicity The invention is therefore also used in connection with described the bush crimping process, although also with achieved good results corresponding to other crimping processes »A particularly preferred stuffer box is described, for example, in German patent application P 20 39 328.6.

In the preferred stuffer box process, the yarn 10 is heated and fed into the stuffer box 24 where the Crimps are introduced into the yarn. The crimped yarn 10 is preferably extracted from the stuffer box 24 pressed or otherwise discharged under a low tension of 0 to 0.05 g / den and through a Cooling and biasing device 26 out, which increases the tension of the yarn by inhibiting the run of the Causes yarn and enables the yarn to come into contact with a braked roller 28 with little slip. The braking effect in the roller 28 inhibits the rotation of this roller relative to the take-off roller 34 and increases the yarn tension further to the desired value of 0.003 to 0.5 g / den, which is under the tensile force of the yarn. Suitable pre

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Tensioning devices 26 may include pinch rollers or other holding devices which restrain the advancement of the yarn to such an extent that the yarn bears against the braked roller 28. In this way, a yarn 10 thus runs from the braked roller 28 via the guide roller 30 and the tension equalizer 32 to the take-off roller 34, which exerts a tensile force on the yarn up to the desired tension, which is below the tensile force of the yarn. A particularly important feature of the invention is the maintenance of a substantially constant pre-tension, draw tension, crimp diameter reducing tension, and winding tension that is not allowed to vary significantly even with variations in the delivery of yarn between braked roller 28 and take-off roller 34. The tension equalizer 32 is preferably a spring-loaded, movably mounted device which changes the distance between the braked roller 28 and the take-off roller 34 and thereby keeps the tension essentially constant. Spring-loaded tension arms, spring-loaded counter rollers or the like, for example tension-controlled speed rollers, to compensate for an applied tension are suitable as tension equalizers. From the take-off roller 34, the yarn runs through the compression device 36, which is coupled with a preferred relaxation of the yarn in the range from 1 to 10%. Conventional twisting or twisting substitutes including air turbulence or the application of an adhesive can be used as the compression means. The yarn 10 is fed from the compression device via the delivery roller 38 to the winding device 40 or directly to the end consumer.

In the transition to the more preferred embodiment of the Invention the yarn is heated to temperatures in the range of 8o ° to 160 ° C just before entering the pucker zone,

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namely in the crimping rollers 22 and the stuffer box 24, heated. A wide variety of heating means can be used, such as heating shoes, hot needles, ovens, hot air and saturated and / or superheated steam; however, it has been found to be particularly advantageous to use a heated draw roll 20. By heating the yarn, the speed and / or the amount of relaxation after stretching is reduced, and in order to be able to adequately monitor the yarn in this state at the production speeds, it is desirable to have a tension in the yarn between the heating zone and the Maintain the frizzy zone. Preferably, a slight elongation of from 0.01 to about 10 % is used.

Poke the crimping devices preferably used the crimped threads under a tension between 0 and a very low tension, for example with Tensions from 0 to 0.05 g / den and particularly preferred between 0 and 0.02g / den. It has been found that "by applying a higher voltage, such as, for example would be required to actually get the yarn off Pulling off the crimping device, fluctuations are introduced into the yarn, which later affect the bulk properties of the yarn and / or in the dyeability of the yarn as stripes, streaks ("worms") or other undesirable Make mistakes noticeable. It is believed that this is due to the fact that periodically or irregularly increased tension is required to pull the yarn off. For this reason the yarn is pressed out of the crimper under tensions which are not higher are than 0.05g / den and preferably below.

Usually that is what emerges from the pucker zone The yarn is still heated. For this reason, when the yarn emerges from the crimp zone, it will through

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the application of cooling air cooled. One special advantageous type of cooling of the yarn with simultaneous generation of the first "pre-tension" in the yarn is brought about by directing a continuous jet of air against the moving yarn As a result, the yarn exiting the crimp zone is preferably under a very low tension The tensioning of the yarn caused by the air jet further processing in the subsequent tension stages relieved. A particularly suitable method and apparatus for carrying out this cooling is in already described above German patent application P 20 39-3.28.6.

The cooling jet both cools the yarn and its pre-tension up to a value of 0.003 to about 0.1 g / denier, preferably 0.004 to 0.07 g / denier Achieved .. Any non-reactive gases can be used to cool the yarn; Air is preferred. Special cooling of the air is usually not necessary. The ambient temperature of the air is generally very high suitable. '"'" "'" "'

The amount of tension under which the yarn is 'pretensioned' is brought about by regulating the gas pressure, the angle at which the gas hits the yarn, the flow rate of the gas, the arrangement of the jets etc. set.

A number of the most varied can be used as the brake disk 28 known brake disks, such as, for example, channeled disks braked by friction, come into question. Particularly A magnetic coupling is preferred as the brake disc, with which the braking tension can easily be adjusted so that that it corresponds to the voltage subsequently applied.

10 9 8 4 9/1 73 9

Other devices for friction braking, for example Fluid couplings, eddy current brakes and the like. Can can be used with correspondingly good results.

Between the braking roller 28 and the take-off roller J> h , the running yarn is brought under a substantially constant tension. This voltage is lower than the voltage required for stretching the yarn, "you, but is sufficient to the crimps in the yarn by reducing the Kräuselungsdurchmessers without permanent Entkrauselung of the yarn removing part. This stretching eliminates the synchronism of the crimps and introduces a latent effect into the crimp, which enables the end products to be produced more easily from the yarn and to improve the development of the bulk or the bulge in the end product. The size of the stretching is thus in the range from about Q ₄ OOJ to 0.5 g / denier, preferably from. about 0.004 to 0.1 g / denier, although higher tensions are possible but less desirable. The tension equalizer 3'2 is adjusted at the applied tension so that tension fluctuations which may occur due to periodic or irregular fluctuations in the delivery of the yarn via the braking roller 28 are smoothed;

Pig. Figure 2 graphically depicts the crimp characteristics of the preferred sawtooth crimp of the present invention in the area circumscribed by the lines ABCD. An also preferred combination; peculiar to crimps is circumscribed by the area WXYZ. The crimp diameters in inches are plotted on the ordinate and the crimp frequency in crimps per inch ₍ plotted on the abscissa. The crimp frequency is the number of crimps on a section of the crimped thread divided by the length of that section in inches

Lines "m" indicate the frequency in the uncurled state. again, which is defined as the number of crimps _: on the crimped section of a thread divided in inches by the drawn section of the same crimped section. The lines r / indicate all the percentage crimps which are a measure of the length of the thread occupied by the crimps. They are determined by measuring the length of the thread under a load of 0.07 g / den minus the length under a load νpri "...., .. 0.0001 g / den divided by the length under a load of 0.07 g / den. . _;

> ■■ '. · ■■ - · ■' ■■■■ ^: '. ■■■ '■' ■■ ■■

It is to be observed that the yarn wound on bobbins possesses latent bulk properties, which are caused by the heat. action are caused. This enlarges the crimp diameter with a simultaneous corresponding shrinkage of the yarn. The total shrinkage of the yarn or. of the thread is determined by measuring the length of the crimped yarn under load before steaming at IpO ⁰ C and drying in hot air at 14o. C minus the length under the. same load after steaming and drying in hot air at l4o C, divided by the length, under a load prior to the steaming and drying in hot air at 140 ⁰ C The calculation. Ratings are based on a trial length of .3Q yarn. ..._ ■ * cm and a load of 0.0001 g / den. , The steaming be.i ,,. ,. 100 C is: carried out for 5 minutes, followed by ..-. Drying in a hot air oven at ⁰ C 14Q also currency ,. rend 5 minutes. _; - - ■, _-. ... ..:: ....,. -.

When performing the procedure described, the _s ; . The aforementioned variables are regulated in different ways in order to achieve the desired values. -To obtain threads ,, mainly- ■ borrowed by scheme, the ^ Betri ^ b, s ^^ rameteir ·. -The-Increase. the . Temperatures before the Krüselurigs, eln3-4e.s. Yarn, increases the shrinkage and increases accordingly, the Krüselurigs temperature and the -

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IAD ORfGfNAL,

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Percents of crimp in the resulting yarn. The textured denier and the percent crimp on a bobbin , ie the yarn in a tensioned and untreated or unbuckled state and the frequency in the uncrimped state, are independent of the preheating temperature of the yarn.

The increase in the output speed of the crimping means, i.e. the withdrawal speed from the stuffer box, compared to the insertion speed, decreases the shrinkage, reduces the crimp temperature, the Percent developed curls, the frequency in the uncrimped state, and the textured denier. The percent Crimps on the spool are essentially unchanged.

Increasing the stretching tension after crimping, that is between the air nozzle 26 and the take- off roller JtK, increases the shrinkage, while an increase in the textured denier increases the percent crimps introduced and the frequency in the uncrimped state. The percentage of crimps on the bobbin is decreased.

Explained in more detail, these principles mean the following: At a constant yarn feed rate to a crimper of about 488 m / minute the highest shrinkage percentage is obtained with lower Discharge speeds from the curling zone of, for example, about 396 m / minute, and this percentage of shrinkage decreases as the discharge speed increases it is increased up to speeds which are close to the introduction speed. In the same way influences, if the other parameters are kept constant, the preheater temperature of the yarn introduction of the crimping device, the shrinkage percentages, in-which higher yarn heating temperatures cause higher shrinkage ..

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The percent crimp produced follow the same rule like "the shrinkage under the same conditions as the frequency in the uncrimped chance, determined in crimp / inch uncrimped length of thread. It follows from this that the shrinkage regardless of the frequency in the rustic ruffled The state can be regulated by regulating the yarn pre-heating temperature. Both the stretching tension and the rate of discharge affect "shrinkage and frequency in the uncrimped state. Thus, a A decrease in the discharge speed can be compensated for by a decrease in the tension and vice versa ^ versa to get either the same frequency in the uncrimped. State or maintain the same shrinkage. The discharge speed can be regulated accordingly that the desired crimp frequency is achieved with the required shrinkage, and the shrinkage is achieved through the exact preheating temperature.

The threads of the yarn according to the invention are mostly in "unbloomed" condition wound on reels, i.e. before the Developing the bulge. As a result, the threads have latent building properties, which normally only later ■ be developed in the end product, for example in the

tufted carpet. V / hen a yarn shrinks and Kräuse- W 'developed pulmonary, its length decreases, and the throughput' diameter is greater. The bloom is related to the crimp diameter and the crimp frequency in that maximum fullness is obtained when the threads reach maximum surface or volume high _: values of shrinkage and curl percentages.

It has been shown that optimal values of diameter and Frequency always deliver high shrinkage values. It has turned out to be

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ner shown that optimum values can be achieved for both Kräuselungsprozente and best aesthetic properties and the most desired Ii have ¹ Ulie result. With a range according to the invention for the crimp percent Tj of 22 to 50 % , this results in the most preferred range of a sawtooth crimp, which was produced in a stuffer box, the area circumscribed in FIG. 2 by OjRST, within which the shrinkage percentages 25 to 52% with optimal values at 29 to 50 %. For a sinusoidal crimp which has been produced by gear crimping, the preferred area is circumscribed by the area _{t represented by WXYZ in FIG} to 45 % and the particularly preferred or optimal value is between about 24 and 50 % . In the case of a helical crimp obtained by blade crimp or false twist crimp, the preferred areas are represented by the ^{area circumscribed by W 1} X ¹ YZ in Fig. 2, within which the crimp percentages are 22 to 50% and the most preferred range between 58 and 45 % .

Depending on the particular type of crimp the values of the circumscribed area or volume the following formulas are given:

(2 / 7-7 / ² ) ^{l / 2} (1 - ^)

A = 5 - for sawtooth crimps

2nT

2 (? - γ ² ) ¹⁷² (1 -?)

A = for sinusoidal crimps

ΤΓπι

V = ^ for helical crimps

16 TTnr gen

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The values A or V have a preferred value for the particular type of crimp, and in the method and product according to the invention the values of A and V, respectively, are essentially unchanged and of constant uniformity along the linear extent of the thread. Constant uniformity means that the values of A or V are essentially unchanged throughout the entire bobbin, and from bobbin to bobbin the value of A or V is essentially the same or varies by less than about jJO % and particularly preferably by less than about 10 % when checking from coil to coil and within the individual coils. Ultimately, of course, the decisive factor is the formation of the threads in the end product. Defects that are due to a lack of uniformity and are not always clearly recognizable on the bobbin are clearly evident in the tufted and colored carpet end product. The threads according to the invention are essentially free of such visible defects in the piece-dyed carpet made from yarns according to the invention. ·

Any synthetic yarn ends may be treated by the method of the invention, including those made of polyamides, polyesters, acrylic polymers, methacrylic polymers, polypropylene, polyvinyl chloride, Polyvinylidene chloride, cellulose acetate, cellulose triacetate, rayon and also from the products of the trade name "Darvan" and "Spandex". These yarns can be any Have fiber ages in the range of about 0.5 to 200 denier / thread, being however 'specifically in the sector of technical; Yarns and carpet yarns of denier in the range from about 8 to 40 den / thread lies The total denier of the yarn can accordingly Vary depending on the particular intended use of the processed yarn. The total denier for carpet yarn is in the range from about 500 to 5000, preferably in the range from 800 to 4000 den. Textile yarns

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suitably have a lower total titer. Naturally Yarns with higher and lower total denier can easily can be processed, but beds can be used according to the invention Carpets are produced which are particularly sensitive to fluctuations in texturing, · ""

Certain .. preferred. Embodiments of the invention described by the examples below «.

Example 1 . _: .., -. . . - _t

• .A fiber made of nylon-6,6 (polyhexamethylene-adipic acid amide) was according to the invention and in particular according to the one shown in Fig. 1 and with the apparatus shown there processed. Undrawn yarn was made from a draw bar and a draw roller. device-fed, where it is at a speed of m / minute with a total draw ratio of

3.82 "was drawn. The drawing roller was heated to 140 ° C., and the thread was twisted around the roller five times; the yarn essentially taking on the temperature of the drawing roller. The freshly drawn yarn was straight with each delivery speed of 505 m / minute the crimping rollers fed to an edging crimper. The compression curling chamber was of the type described in the German patent application P 20 39 328.6- is described. '-

A crimped yarn with generally sawtooth crimps occurred at a temperature of about 80 ° to 95 ° C under a voltage 0, measured on the take-off roller 3 - +> except for the crimping chamber with a take-off speed of approx 427: im / minute off. 'The warm yarn was' passed through a cooling nozzle conducted, which worked with an air pressure of 0.7 atü. The angle of incidence of the gas stream on the yarn formed an angle of 30 ° between the yarn and the axes of the Gas outlet openings. This pressure and this impact

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angle created a tension of about 20 g in the yarn, the about G.007 to Ο, .ΟΟδ g / den. The prestressed Yarn from the cooling nozzle ran over a magnetically braked clutch and a sprung tensioning arm to one Take-off roller, which gives the running yarn a tension of 150 g imparted between the clutch roll and the draw roll. This tension corresponds to about 0.055 g / den.

The yarn was relaxed by 5% of the tensioned length from the take-off rollers ^ 4 and passed through a yarn intermingling nozzle. The yarn was then wound on a spool as a nylon-6,6 carpet yarn 2750/136. This yarn had a hank length of about 31.75 cm and about 10 frills / inch. The strand length was determined using "meter length _: wraps" 22 and then immersed in water at 60 ° C. under a tension of 15 g for 3 minutes before determining the length. The total shrinkage of the yarn was 25 to 30 % and the crimp percent 25 to 30%

The yarn made by this process became one carpet made of continuous threads processed and piece-dyed. The ^ examination of the piece-dyed product showed that it was practically free from fluctuations in bulk or the bulge and the coloring. This is a sign of the evenness of the yarn from package to package as well as within the package.

Example 2

Example 1 was repeated using essentially the same conditions with the critical exception that the yarn was not preheated before entering the upsetting pucker. With the one obtained here Although yarn became an extraordinarily good level of evenness' found, but the thread had very different

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different construction properties. The total shrinkage of the yarn was about 10 %, the crimps introduced was about 10 μj, while the crimp frequency was 10 crimps / inch and the strand length was 3-1 to 4o.6 cm. Although the yarn so produced, when tufted into a carpet, gave a piece dyed carpet which was substantially uniform and free from variations in bulk and color, the bulk and coverage were not as good as the yarn made according to Example 1. It has been found that the total yarn shrinkage does not fall within the scope of the present invention and that the crimp percentages are below that of the present invention and that the final product also has a lower value than the desired bulk and coverage. The threads thus fall into an area outside the area which is described in FIG. 2 by the parameters ABCD.

Would in the same way a yarn according to the invention made by gear crimping using intermeshing gears, this one had one

in the uncrimped state.

Frequency / from 4 to 16 crimps / inch of uncrimped thread length. The other parameters were also used in gear crimping, such as preheating the yarn before crimping, pulling the yarn from the crimping zone under low tension, subsequent tensioning and the other parameters according to the method described above, with values for the crimp percent in the range between 22 to 45 % were obtained, ie values within the area which is circumscribed in FIG. 2 by WXYZ.

Also the blade pucker and false twist pucker results correspondingly good results in the present process. The resulting crimp is helical, and through

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Adjustment of the operating parameters, ie the angle between the yarn and the knife during cutting crimping or the speed of the twisting devices depending on the yarn speed. "With palschwire crimping, the desired 4 to 16 crimps / inch. Uncrimped thread length are obtained, the values of the crimp percentages in the range from 22 to 50 $ correspond, ie in the area are, which is circumscribed in Fig. 2 by W'X'YZ. carpet yarns with correspondingly good properties can vjerden obtained therefrom as described above. _s

Of course, other crimping devices can also be used be used in the method according to the invention for the production of the threads described, with those of each other separate, well-formed crimps can be made.

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Claims (1)

- 19 - ' ^: · 'P "ate η t -a η s ρ rü che Process for the production of crimped yarn with latent Bauscheigens.chaften, characterized in that one a freshly drawn multifilament yarn to temperatures heated in the range between about 80 and 100 C, this heated Introduces yarn into a crimp zone and crimps, the crimped yarn under a low, substantially constant tension and with a substantially uniform tension Speed is withdrawn from the crimp zone, the yarn cools, the tension of the yarn to a substantial extent constant value between 0.003 and 0.5 g / den increases under at least partial reduction of the crimp diameter and finally the yarn to facilitate the further Processing condensed. 2.) The method according to claim 1, characterized in that the yarn is heated by means of a heated drawing roller, 3.) Process according to claim 1 and 2, characterized in that the yarn is heated by wrapping the heated drawing roller several times. 4.) The method according to claim 1 to 3> characterized in that the yarn between stretching and crimping is slightly stretched by about 0.01 to 10%. 5.) Method according to claim 1 to 4, characterized in that that the yarn is crimped in a stuffer box and out this pulls off under a tension of 0 to 0.05 g / den. 6.) Method according to claim 1 to 5, characterized in that that the withdrawn from the crimping zone yarn under a in the weekly constant voltage between 0.003 and 0.5 g / that holds. _{109849/1739:;} 7.) Method according to claim 1 to 6, characterized in that that the yarn is simultaneously cooled by the action of a gas jet and drawn while increasing the yarn tension to 0.004 to 0.07 g / den. Γ 8.) Method according to claim 1 to 7, characterized. ■ "'.- that the compression of the yarn after tensioning is effected by swirling the yarn by means of a gas in an enclosed zone. 9 «) Method according to claim 1 to 8, characterized in that that one consists of continuous threads Polyarnidga.rn with a total titre in the range between about 500 and 50000 used the. 10.) The method according to claim 1 to 9, characterized in that one uses a carpet yarn with a single titer of about 8 to 40 den and a total titer of about 800 to 4000. H ·) Synthetic crimped polymer threads, consisting of synthetic continuous threads with a large number of crimps isolated from one another in the puffed state, characterized by the parameters of a frequency in the uncrimped state, in the range from 4 to 16, by 22 to "50 # crimps and determined by the parameters of a frequency in the crimped state in the range from 5 to J> 2 and a total shrinkage in the range of 20 to 50 % on the non-bulky thread, with the threads having a high degree of permanent uniformity along their linear length, which is determined was determined from an essentially constant value of each parameter and from an absence of visible thread defects in a dyed fabric made from a yarn consisting of a large number of these polymer threads. 109849/1739 BATH ORIGINAL 12.) Polymer threads according to claim 11, characterized by a sinusoidal crimp of the threads and 22 to JO% crimps. 13.) Polymer threads according to claim 11, characterized by a helical crimp of the threads and 35 to 50 % crimps. 14.) Polymer threads according to claim 11, characterized by sawtooth-shaped crimping of the threads and 22 to 35 % crimps. 15.) Polymer threads according to claim 11 to 14, characterized in that they consist of polyhexamethylene adipamide and have a single titer in the range between b ¹ and 40 and a total titer of 500 to 5OOO. 16.) Polymer threads according to claim 11 to 15 * characterized by the parameters circumscribed by the line ABCD of FIG. 17 · ') polymer threads according to claims 11 to 15 * characterized by sinusoidal ripples and the parameters circumscribed by the line WXYZ of FIG. 18.) Polymer threads according to claim 11 to 15, characterized by sawtooth crimps and those created by the QRST line parameters circumscribed by FIG. 2. 19. ) Polymer threads according to claim 11 to I5 » characterized by helical crimps and the ^{parameters circumscribed by the line W 1} X ¹ YZ of FIG. 109849/1739