DE1760771A1 - Synthetic frizzy filament and process for its manufacture - Google Patents

Description

Toyo Rayon Co., Ltd. L 83 5'5

No. 2, Nihonbashi Muromachi 2-chome, June 30, 1968

Chuo-ku, Tokyo / JAPAN Gg / to

Synthetic crimped filament and process for making the same.

The invention relates to a synthetic crimped filament with a certain cross-section and a method for its production.

It is known that synthetic filaments with polygonal cross-sections, such as triangular, pentagonal, Star profile or professional forms modified from it. Spinning nozzles are used here, the outlet openings of which are shaped according to the desired profile cross-section.

In the case of the production of synthetic filaments from thermoplastics with the above-mentioned cross- sectional shapes, it cannot be avoided that these filaments or those made from them

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Woven or knitted goods are "guard-like" and do not lose this property acquired during manufacture later on. They also have the so-called prismatic reflection effect on, which is caused by the shape of the cross-section, the filaments appear to have a metallic sheen d. This effect affects the quality of the woven or knitted fabric produced from such filaments with a polygonal cross section.

As is also known, has been used in recent times construction yarns with a high degree of bulk, in which the thermoplastic Properties of synthetic filaments made from thermoplastics can be used to manufacture garments and regardless of the cross section of the filaments. It should be noted in this connection that in general the

Elasticity of such filaments with a polygonal cross-section is not

is sufficient to maintain the bulkiness of the fabric, for example, when the G · -.; weave is temporarily exposed to pressure. After releasing this pressure, the initial bulk of the fabric does not become more manufactured. This bulkiness, which is caused by the elastic property of the filament, is discussed below referred to as "bulk effect".

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It is known in theory that the bulk effect of a textlien Tissue can be enlarged by increasing the resistance of the fiber or filament to a bending force. These Theoretical considerations have already been implemented in the manufacture of carpets, for example, in order to improve quality here to reach.

In order to make synthetic fibers or filaments available on the market, the problem of so-called "pilling" must also be solved This problem arises even when synthetic filaments with a polygonal cross-section are under discussion.

The invention is based on the object of creating a synthetic Krau self-filament which is substantially improved in its properties and which in particular does not have the waxy, metallic appearance of the conventional filaments with a polygonal cross-section. The filament to be created should also be significantly improved in its elastic properties in order to obtain an increased bulk effect, and it should be more resistant to pilling.

The solution to the above problem is achieved in a synthetic

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Crimped filament, which has a fineness between 1 and 25 Denier and has a cross section which is deformed to a very great extent with respect to a circular cross section and has more than three branches. This filament is said to satisfy a certain equation, in which the fineness of the filament in denier, the number of crimps per unit of length and the cross-sectional area with the addition of certain constants as arithmetic variables.

To solve this problem, a method for
The production of such a synthetic crimped filament is proposed, which is to be explained in more detail in connection with the following description.

The invention is described in more detail below with reference to the drawing.

It shows-

1A to 1G show, on an enlarged scale, individual cross-sectional shapes of the synthetic according to the invention Crimped filaments,

Figures 2 and 3 show the cross-section of such filaments

to explain the essential to the invention

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Features of the cross-sectional shape according to the invention, Fig. 4 is a representation to illustrate the

Resistance to bending in synthetic filaments according to the invention, Figures 5 and 6 are graphs for illustrative purposes

the relationship between the fineness of the filaments and the number of crimps or areas content of a certain cross-sectional shape,

7 is a schematic side view of a device

for melt spinning synthetic crimped multiple filaments according to the invention and

Fig. 8 is a plan view of the outlet opening of a

Spinneret.

FIGS. 1 A to 1 G show that the synthetic Crimped filaments are characterized in their cross-section by a shape that is substantially different from a circular cross-sectional shape differs and not previously known with the polygonal cross-sectional shape Filaments can be compared. According to the invention Cross-sectional shape is characterized by at least three branches with an almost round transition area between two adjacent branches. The length of these branches is not the same in all cases, the symmetry of these branches is also not the same with respect to

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the center of the cross-sectional shapes. The idea of the invention can now be seen in these special cross-sectional shapes together with the fine ripples, which in principle have a similar shape. The frizzy crimps of the filament can be obtained in various ways during manufacture . For example, the cross-section of the filament can be provided with an anisotropic, shrinkable property eccentrically with respect to its center , or the method for producing so-called conjugated filaments can be used.

It has been found through a long series of tests that the following conditions must be met in order to obtain cross-sectional shapes of a synthetic crimped filament which meet the objectives of the present invention . Ks is now about relative conditions between the number N of crimps per unit length in inches and the cross-sectional area R de * filaments or the fineness D of the individual fibers. If these conditions are met, a waxy appearance of the filaments is prevented. These conditions can now be captured by the following equation:

-0.215 1og ₁₀ D +1.000 = log _{1 ()} N * - 0.589 lpg ^ D + 2, 301 0.606 = log R = 0.111 log D + 0.845

1 = D = 25

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The following should now be said about the above equation:

1. Number N of crimps per unit length in inches:

A sample of curled filament of a specified length is prepared. The number N of crimps is below the tensile force of 10 mg / denier was measured. Then the length L of the sample is subjected to a tensile force of 100 mg / denier measured. The number N of crimps per unit length in inches thus occurs as a function of N / L.

2. Area R of a certain cross-sectional shape: With reference to FIG. 2, it should be stated that first around the cross-sectional shape an outer circle 1 and then an inner circle 2 can be drawn. The diameter of these circles is measured. The area of the cross-sectional shape results is then derived from the ratio of the diameter of the outer circle 1 and the inner circle 2. "

It is believed that when the above conditions are satisfied, the very fine frizzy crimps of the filament are removed periodically develop that a very fine, robust surface of the filament is formed, which in turn has the consequence that this creates an extremely fine, roughened surface due to the longitudinal edges and therefore prevents the wax-like appearance

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can be. Preventing such a waxy appearance, in turn, creates a pliable concern of such Filament-made fabric on the user's skin. If the crimped filament according to the invention is exposed to light irradiation, only a diffused light reflection can be determined, which is due to the aforementioned roughened and robust Surface of the filament., This in turn means that the Filament has almost no metallic luster at all, but it does is present to a very large extent in previously known filaments with a polygonal cross section. >

The crimped filament of the present invention differs from that known filaments in particular in that its resistance to bending is significantly increased, with for comparison Filaments with a circular cross-section and approximately the same fineness are used. Furthermore, the crimped filament according to the invention is particularly notable for its outstanding elasticity because this high elasticity is achieved by enlarging the area, the bulkiness of such filaments is significantly improved.

Based on the series of tests carried out, it was now possible to find that, on the other hand, far better results

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" ⁹ " 176077

can be targeted if the following conditions are met. If one proceeds from the assumption that the cross-sectional shape of the crimped filament according to the invention differs significantly from a circular cross-section, then the length of the branches by x, the width of the branches by y, the cross-sectional area by X and the area of the outer circle ^ l by Y be represented. This then leads to the following two conditions that must be met according to the invention:

ji / γ = 3.0 to 11. 0 X / Y = 0.15 to 0. 60

For the above conditions it applies that the factors χ and y occur as total lengths, χ is the sum of the lengths of the branches, which are each measured from the intersection of the center lines of two adjacent branches. In addition , there is the distance between two neighboring crossing points. Referring to FIG. 3, the Kreuzungepunkte lind designated by the reference numerals 3 and 4.

The length; the branches are shown in a, b, d and e. The distance between crossing points 3 and 4 is shown in c. Hence iitx aa + bt c + d + e,

On the other hand, I leave y because of the relation y = X / x

10980Θ / 1959

• Rather easy to calculate, the above condition (χ / γ ) UHt eich therefore represent al «: x / y = x ² / X _r

The factor y therefore represents the mean width for branches of the filament cross section of the present invention.

A synthetic filament, which according to the invention *. the aforementioned

/ en Condition of the View} N of Ripples and the Pedations About the size of the cross-sectional area (factors, η / γ m4 M / V) e'fttW, has improved properties in terms of structural integrity because of “an increased volume”. On such synthetic filaments made according to the invention, web adf? More Wartn are äufleret slightly Gpwipht, have a high Bausefeigfcffit on, do not have a wake-like appearance, habiü 4upge * EICTA · Siftiif transactions 4 * r Wärmeeurttckhaltung and si ·% ·· ΙΙ terms |! Ϊ́ · ιι an elegant, non-metallic Glan » ,

In general, woven or knitted fabrics made from synthetic fibers or flakes have the disadvantage. d * <«ie for \

:

Tend to pilling. To prevent this pilgrimage,

■ If you were looking for textile materials of low tenacity,

In doing so, one was guided by the idea of “the main. ι

1.OMOT / 1.11 ·

V "■

The most probable cause for such pilling is to be found in that materials with high toughness were used. However, Ee became long in the context of the preceding invention A series of experiments found that up to now an erroneous idea has always been assumed with regard to pilling. It namely, it has been found that even when using undrawn synthetic filaments with low tenacity in the order of magnitude from 1 g / d the fabric tended to pilling to a very high degree. The tenacity of the aforementioned unstretched filament is very high, on the order of more than 100%, the undrawn filament is generally considered to be very durable Material viewed against repeated bending or stretching.

The test series have now shown that pilling then occurs can be prevented if the product of toughness (g / d) and elongation at break ("V) was less than 100. Furthermore, it was found That is, for example, that an essential factor in preventing pilling is the elasticity of the filament Moment of inertia of the cross-sectional area of the filament at least 1.5 times the moment of inertia of an imaginary circle with same area as the aforementioned cross-sectional area of the filament according to the invention, then pilling is almost complete prevented.

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The moment of inertia of the cross-sectional area of the invention Filament is determined as follows. Using FIG. 4, this moment of inertia I can be calculated according to the formula

f ^{A 2} yes I = / a dA

■;

calculate. Here, the factor a represents the distance from a certain point on the cross-sectional area to a line passing through the center 5 of the cross-section passes through it. With dA becomes a smaller one Designated section of the cross-sectional area. The lines referred to are identified by the reference numerals 6 7, 8 9 and 10 11. The minimum value of the moment of inertia I corresponds to the line 6 7, which using the above formula indicates that the moment of inertia of the cross-section of the filament of the invention has a far higher resistance to bending possesses compared to a filament with a circular cross-section and the same fineness in denier.

The conditions mentioned so far do not only relate to a special synthetic filament produced by the melt spinning process; these conditions apply equally to so-called polyamides, such as poly _r t caproamide, polyhexadiamine, adipamide, polyesters such as polyethylene terephthalate, polyolefin such as polypropylene or polyethylene. It should be noted, however, that the

109809/1959 Γ

Poly-C - caproamides are best for the filament according to the invention suitable.

The production of the invention, according to Kraus elf filaments is like follows made. It should first be pointed out that it seems almost impossible to use the filaments according to the invention conventional processes, i.e. according to the gsur process Manufacture of synthetic filaments, for example with a polygonal cross-section. Even if one were to use a spinneret with an outlet opening which, for example, in FIGS. 1A to 1 G corresponds to the cross-sectional shapes shown, the melt spinning process would not result in a desired cross-sectional shape, because immediately after leaving the spinneret in the period up to the subsequent coagulation of the filament over the surface of which a tensile force would have an effect. Because This disadvantage identified by the lengthy series of tests must be in accordance with the invention in order to produce the invention Crimped filaments of a certain cross-sectional shape cause coagulation of the filaments are made as close as possible immediately behind the outlet opening of the spinneret. In addition, must

according to the invention for the outlet opening of the spinneret the desired cross-section of the filament

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When cut, “the branches that are smaller than the branches of the cross-section of the filament, the width of these branches must also be chosen to be more straightforward. The length I of the branches ought to be Ö, I - 2 »S mm and the width g of the branches should be less than 1/4, preferably less than 1/6 of this length amount (see rig. I), but for the width it was valid that · the minimum dimension of 0.07 mm should be undercut,

in order to ensure that a branch has two ends in the cross-section is formed.

For the filament according to the invention, a polymer with «in ·»! high polymerizability can be used. If a poly-fr-caproamide polymer is used, then the relative Viscosity in relation to Schwelelsiture heh ·! «1 · 2.4, in advance higher than 2.6.

• \ Fig. 7 shows a device »to share the invention ·· according to filaments 14, which by the Autrltteöiinungen an Ipinn · nozzle 12 of a known melt spinning device made of stoles and are then coagulated. With the reference Ii is the Coagulation chamber, which see the exit opening of the Spinndttse 12 stops immediately. OU extruded filament

are secluded at high speed, and «was means

♦ ORIGINAL INSPECTED

100101 / HSi

Rollers 15 and an endless conveyor belt 16 and will eventually to reel 16 on ge, at a speed of more than 3000 m / min.

In the coagulation chamber 13 is via a supply line 19

Air is blown in, with this air only one side of the filaments is released

14 applied. This can be clearly seen from the flow arrows shown in FIG. 7. The application of the filaments with Air enters from a height of about 5-15 cm below the outlet opening of the spinneret 12. If the distance to the outlet opening of the spinneret 12 is less than 5 cm, this brings about the risk of the filaments breaking when they are wound into a roll. If the distance of 15 cm to the outlet opening of the Spinning nozzle 12 exceeded, then this brings disadvantages in terms of the coagulation, which leads to disadvantages with regard to the formation of the cross-sectional area of the filaments results. When coagulating should be in accordance with the number of crimps that are required are driven in order to give the filament the properties according to the invention at a speed between 10 and 100 m / min be, preferably at a speed between

15 and 50 m / min. The temperature in the coagulation chamber 13 should be on the order of 15-22 C.

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As mentioned above, it should take up a winding speed of more than 3000 m / min, are driven in order to achieve the cross-sectional shape of the filament according to the invention. In combination With the aforementioned speed in the Koagulationekamtner this winding speed plays an essential role in the To give filaments the cross section according to the invention. The upper limit of this winding speed should be around 6000 m / min, lie.

If the different speeds mentioned in the previous paragraph are adhered to, then numerous crimps can be developed in a multiple yarn during subsequent steam treatment in the relaxed state. As already mentioned, poly- ¹ · "caproamides are particularly suitable here. It can be stated that the number of crimps that develop in a multiple yarn, the greater the ratio of the moment of inertia of a single filament in relation to the moment of inertia is an imaginary circle with the same cross-sectional area and the stronger the output of the coagulating air.

example 1 Poly-tS-capromide with a relative viscosity ri of 2.8 with respect to

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Sulfuric acid was extruded in a device according to FIG. 7 through a spinneret at a temperature of 260.degree. The developed filaments were wound up at a speed of 4000 m / min around a multiple yarn of 80 denier / 20 filaments to obtain. The spinneret had one of the cross-sectional shapes shown in FIG. 1B corresponding outlet opening, each branch had a length of 1.25 mm and a width of 0.1 mm. In chamber 13 was a Maintained a temperature of 18 C, the air flowed onto the filaments at a distance of 5.5 cm from the outlet opening of the spinneret 12. The speed at which the filaments passed through the chamber 13 was between 10 and 100 m / min. After being wound into a bobbin, the multiple yarn was subjected to a steam treatment in a relaxed state.

The multiple yarn was then turned into a knitted fabric

2
Made with a weight of 140 g / m, the properties

of this knitted fabric are recorded in Table 1 below:

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176077

• Table 1 R. N ι
i
j roughness 8-
I degree Relative
number of,
Cover fibers sample Delicacy d.
Single filaments
in denier 5.0
4.5
4.0
6.2 31
36
40
37 4.6
3.8
4.3
4.5 75
87
to
74 1
2
3
4th 4th
4th
4th
4th 1.0 30th 1.2 92 Yarn ^ made
poses with
Stuffing box 4th 1.2 48 1.5 100 Yarn, here
poses after the
"Wrong company
the "method 4th 1.5
* 25th 2.2 97 Yarn, here
sets with on
intentional
advises 4th

The values in the "Degree of roughness" column are Average values from 20 expert opinions. The individual values fluctuated between 1 and 5, with the value 1 for very poor roughness ^ and the A value of 5 should be given for excellent roughness. The values in the column "Relative number of cover fibers" were through obtained the following measurements. A piece of cotton with a diameter of 1 cm with a wickerwork made of the multiple yarn according to the Invention covered, the number m of multiple yarn strands necessary for covering was counted. Subsequently was the same cotton part covered with one in the same way

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Yarn, manufactured according to the "false thread" process, here too the number m was used to cover the cotton rope required strands are counted. The "relative number of cover fibers" was then obtained by comparing the values m and m multiplied by the factor 100. The values in this column are percentage values, which are determined by the equation m / m « were obtained. The table shows that the smaller the value of the "relative number of cover fibers", the more better the result can be viewed.

Example 2

Poly-C- caproamide with a relative viscosity tr \ of 2.95 with respect to sulfuric acid was also extruded in the device according to FIG. 7 through the spinneret at a temperature of 260 ° C. and then wound up at high speed to form the roll. The coagulation air was on one

ο
Maintained temperature of 20 C, she was to act with

brought the filaments at a distance of 6.0 cm from the outlet of the spinneret. The ejection speed was between 15 and 60 m / min. The multiple yarn wound into a lap was 80 denier / 20 filaments, it was then steamed. At a winding speed

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of 3800 m / min, the values according to were obtained for samples 5-9 Table 2 below, at a winding speed of 2600 m / min, the values were obtained according to samples 10-12.

ι
! Size IB 1 Tabel B. 1 2 fineness 7th R. N x / y j
X / Y 18th Ba. W. sample IB d. Spinneret 1 8th 175 IG 1 0, 1 6th 20th ID 1 0, 15th - d. Singles- 5 35 IA 1 . 0, 1 filaments 5 , 5 20th 5.1 0, 35 3 50 profile IB 1 0, 1 in denier 3 0 20th 6.0 0, 42 343 155 5 IB 1 .2 0, 1 4th 1 0 20th 4.0 0, 55 320 107 6th Fig. - 0 , 25 0, 1 15th 2 3 25th 5, 5 0. 7th 392 115 7th Fig. 0 , 2 0, 4th 5 25th 5.0 <■ ·, 360 140 8th Fig. 0 , 3 0, 3 , 0 18th 2.0 0, 180 137 9 Fig. , 3 4th , 5 18th 1.3 0, 120 106 1 0 Fig. . 5 4th , 2 18th 2.0 0, 120 102 1 1 Fig. , 3 4th 103 1 2 Fig. , 7 4th

L. - length of the branches in mm
B. = width of the branches in mm
Ba. = Bulkiness in%
W. = degree of heat retention in "? <>

The values given in the "Bulky" column were obtained as follows. A filament of 2g made from a multiple yarn
was prepared on a reel machine with a circumferential length of 60 cm, and then a weight of 10 g was hung from one end thereof. Under this load, the cross-section of the Fitzfadens was then measured in the middle area. In the same way

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• Measurements were made on a filament thread had been made with a circular cross-section. The "bulkiness" was then obtained from the ratio in% between the first and the second value.

The values recorded in the "Heat Retention Degree" column were obtained as follows. A woven fabric with a plain weave and a

The structure of ——— was made from a multiple yarn

192 χ 90

according to the invention. This woven fabric was placed over the surface of a drum which was kept at a constant temperature, and a reading was obtained of the radiation energy which has passed through the fabric. The radiation energy that penetrated a fabric made of a multiple yarn with filaments with a circular cross-section was measured in the same manner and width. The value for the column "Degree of heat retention ¹¹ " was then obtained by comparing these two radiation energy values, multiplied by 100.

Example 3

-Caproamide with a relative viscosity f ^ of 2.85 in terms of Sulfuric acid was also extruded into a multiple yarn of 80 denier / 20 filaments in an apparatus according to FIG. 7.

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The properties of this multiple yarn are shown in Table 3 below, in which a winding speed of 3500 m / min was used for samples 13-17 and a winding speed of 2600 m / min for sample 18 .

Table 3

Sample (size of the spinneret fineness
I: »d. Single profile LB filaments

in denier

R N j x / y X / Y; Ba. W.

13th H 1.3 0.1 4th 14th H 1.3 0, 15 4th 15th H 1.3 0.1 3 16 H 1.8 0.1 6th 17th H 2.5 0.1 8th 18th H 0.7 0.1 4th

5.3 20th 5.00 0, 495! 380 143 6.5 20th 6.00 0.31 y 410 152 5.5 20 · 5.20 0.42 365; 130 4.4 25th 4.80 0.44 395 140 5.7 25th 5.50 0.36 402 130 3.0 20th 2.70 0.53 209 ^! 105

Example 4

-Caproamide with a relative viscosity -M of 2.95 with respect to sulfuric acid was again extruded in a device according to FIG. 7 at a spinning temperature of 265 ° C. to give a multiple yarn of 70 denier / 24 filaments at a spinning speed of 4000 m / min. The coagulation air was at a value of

ο
Held at 17 C, it acted upon the filaments at a distance of

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7.2 cm to the outlet opening of the spinneret, which different Cross-sectional shapes were given. The ejection speed was between 20 and 50 m / min. After winding to the winding a steam treatment was applied in a relaxed state to develop a curl.

A knitted fabric with a weight of 130 g / m 2 was made according to the samples A made from this multiple yarn, this fabric is compared with a fabric B made from poly- £, - caproamide crimped yarn, which in turn was made by means of a stuffing box. Samples C cover a woven fabric made of crimped poly-caproamide yarn, manufactured according to the "wrong thread" process. The fabric according to the individual samples was made into shirts, which were subjected to 30 expert opinions after being worn over a period of 60 days. The values in the last column of the following Table 4 shows the mean values of these expert reports.

illustration of pilling formation.

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Table 4

sample R. N 43 (I / I ') min. Toughness (T) Elongation at break (T) x (E) Degree of pilling 38 in g / denier (A % education A. 7.0 32 2.3 1.5 27 41 after 60 days: none A. 6.0 35 2.1 1.8 33 59 M. A. 5.0 33 1.7 2.0 41 82 Il A. 5.0 37 1.8 1.9 40 76 Il O A. 4.2 30th 1.6 2.1 42 88 slightly on the 50th day (O A. 6.0 17th 2.1 · 1/9 32 61 after 60 days no 5? CD
^^ A. 5.5 48 1.9 1.8 30th 54 Il C3
CO A. 4.5 45 1.7 2.8 48 134 after 30 days: considerable B. 2.0 36 1.2 3.0 42 126 after 14 days: considerable - » B. 1.5 33 1.1 3.1 43 133 Il CO B. 4.0 48 0.3 3.5 39 172 It CO C. 1.0 29 1.0 3.8 39 148 on the 10th day: considerable C. 1.9 50 1.2 4.1 41 168 on the 14th day: considerable C. 1.4 1.1 2.9 47 136 Il C. 2.2 1.2 ?..O 35 70 detected after the 30th day

In the table above, I means the effective moment of inertia of the tested yarn and I 'means the moment of inertia of an imaginary circle, the area of which is the cross-sectional area of the tested Of yarn.

ORIGINAL INSPECTED

Claims (9)

PATENT CLAIMS 1. Synthetic weed selfilament, characterized by a fineness between 1 and 25 denier and a cross-section which differs substantially from a circular cross-section with at least three branches, this cross section satisfying the following equation: -0.215 log D + 1.000 = log N 5 -0.589 log D + 2.301 0.606 ί ^lo 8 ₁₀ ^R = 0.1HlOg ₁₀ D +0.845 where D = fineness of the filament in denier N = number of crimps per unit length in inches R = cross-sectional area of the filament means. 2. Synthetic Krau selfilament according to claim 1, characterized in that dad the cross-sectional area of the filament satisfies the following equations: 3.0 = y = 11.0 ' 0.15 = γ- = 0.60 whereby χ = total length of the individual branches of the cross-section y = mean width of the individual branches of the cross-section iöH <i9 / im . ₂₇ _ X = cross-sectional area of the filament Y = cross-sectional area of the smallest around the cross-sectional area of the filament circumscribed circle
means. 3. Synthetic crimped filament according to claim 1, characterized by a minimum value of the moment of inertia of the cross-sectional area of the filament on the order of more than 1.5 times Moment of inertia of a circular area with the same area and a value less than 100 of the product of toughness and Elongation at break of the filament. 4. Synthetic crimped filament according to claim 1, characterized in that that the cross-sectional area of the filament with respect to its center with an eccentric, anisotropic shrinkage property is provided. 5. Synthetic crimped filament according to claim 4, characterized in that at least two types of thermoplastic
Polymers are distributed eccentrically in the cross-sectional area of the filament. 6. Synthetic crimped filament according to one of claims 1 to 5, 109809/1959 characterized in that the filament is made of a poly - ^ - caproamide polymer. 7. A method for producing synthetic crimped filaments according to one of claims 1 to 6 from thermoplastic, synthetic polymers using a spinneret with a plurality of outlet openings with the cross-section of the filaments to be produced corresponding cross-section, characterized in that the branches of the outlet cross-sections of the spinneret compared to their width have a significantly greater length and that at a distance between ^r > and 1 5 cm from the outlet openings of this spinneret on the filaments a very strong air flow is brought into action on one side and that the coagulated filaments at a speed of more than 3000 m / min, to be wound up to the winding. 8. The method according to claim 7, characterized in that the length of the branches of the outlet openings of the spinneret between 0.5 and 2.5 mm and their width less than 1/4 of this length, but more than 0.07 mm. 9. The method at least according to claim 7, characterized in that when using poly-i. -Caproamids have a relative viscosity of 2.4 with respect to sulfuric acid . 109809/1959 Blank page