DE2059177A1 - Process and device for wet spinning - Google Patents

Description

The invention relates to a high-speed wet spinning process and to a device for carrying out process ₀

Usual manufacturing processes and facilities for wet The spinning of continuous threads is in need of improvement, as they have a significant number of thread breaks occurs and a considerable amount of fluff masses during the spinning process and subsequent stages occurs when the overall operating speed of the manufacturing facility is increased to 400 m / min, or more wouldο

The present invention is based on the observation that one cause of these disadvantages of known methods is that those cast out by the and

! 00114/1765 -

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bath liquid carried along by coagulating threads hits a secondary bath, which is thereby disturbed and which Adversely affected thread quality

The main purpose of the invention is to provide a method and an apparatus in which such Fluid disturbances in the secondary bath can be avoided, which is the case with every spinning and coagulating unit of a yarn manufacturing plant is provided.

A second serious disadvantage often encountered when wet spinning filaments is the difficulty for which Change of the thread condition to provide a suitable method and device with which the tensioned State of the threads in the spinning and curing stage as above modified so that the threads can be post-treated in subsequent stages »

The invention therefore aims to provide a method and an apparatus which also work in an effective manner solve this problem «,

In the case of a method and a device for wet spinning, a stationary guide cannot be avoided or to use stationary guides for the continuous filaments ο If the manufacturing facility is for wet spinning of threads with speeds of 400 m / min, or even higher, leads to the contact of the threads such guide means, which are naturally rigid

109124/1765 - 3 -

forms are, to thread breaks in considerable and therefore unbearable extent

When manufacturing copper oxide ammonia threads, ZoB _e

such thread guide pins or combs that are in

constant mechanical contact with the ejected, coagulating threads ₀ As a result, copper hydroxide is deposited in steadily increasing amounts, which becomes harder copper oxide o This hard oxide deposit that collects on the contacting surfaces of the guide pins and / or combs causes the thread breaks that more and more increase if the operating speed of the system increases w ± rd _e when a yarn breaks through mechanical contact with the hard and irregular surface of the deposited copper oxide, it wraps around the adjacent filament or _0, the 'adjacent strands; this increases the number of monofilaments when the group

the wet spun and coagulated filaments through the

Manufacturing plant or post-treatment stages

goes through o

According to the invention, the liquid of the coagulation bath carried along by the running threads is in their Speed inhibited by using a novel fluid brake o

According to a further teaching of the invention, the after · »- treatments - ± & - of the spun and coagulated threads

109624/1765 " ⁴ ~

run in a fully relaxed state to to avoid the usual pens and combs, which are used in post-treatment stages according to known processes be ,, by engaging a novel and effective Conversion stage for the state of the threads as well as means for converting the tensioned state into a In the fully relaxed state for the post-treatment stages, this goal is achieved

The method according to the invention for producing endless threads is particularly characterized in that at a point between the spinning and coagulation stages and the aftertreatment stage is provided with a thread condition conversion stage in which the threads be subjected to sudden mechanical treatment in order to continuously restore the considerably strained state of the sutures upstream from this point into a loosened one to convert wave-like state, so that the ρ threads in the form of a mat-like layer with looser Thread count on a running, permeable conveyor can be brought to the various Carry out post-treatment steps while the threads are loose β

Further advantages and features of the invention emerge from the claims and from the following description and the drawings in which preferred embodiments of the invention are illustrated and illustrated by way of example are shown.

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Show it :

Figo 1 shows a simplified system

for the production of artificial continuous filaments by the wet spinning process according to the invention, the figure being made in two parts for reasons of arrangement on the drawing sheet, which adjoin one another ^{along the line XX 1,}

Figo 2 is an enlarged axial section of a

Spinning arrangement of the system according to Fig _β 1,

3 shows an enlarged axial section of a

Liquid braking and spray unit for use in a system according to FIG. 1,

Fig. 4- is an enlarged perspective view

a saddle-like thread guide for the Plant according to Figo 1,

Figo 5 is a side view of a pair of tension

release rollers which are used according to the invention in the system according to FIG. 1, f

6 is a perspective view of a part

a roll according to Fig. 5,

Fig. 7 is a schematic representation of the spinning

and coagulation unit to illustrate the related axial dimensions of the main components,

8 shows a simplified longitudinal section through

the inner funnel, which is used in a device according to Fig. 1,

10982W17S5

to illustrate the relationships between the main dimensions,

FIG. 9 'shows a longitudinal section through the one shown in FIG

set unit to illustrate the relationship between the main Dimensions,

FIGS. 10-14 simplified, explanatory illustration of FIG

several modified embodiments of the unit shown in FIG. 3,

15-18 diagrams to illustrate test results, and

19 + 20 simplified representations to illustrate the dimensional relationships in the State-of-the-art systems,

The general representation in Fig. 1 shows a spinneret-funnel arrangement 1 of the double funnel type, which has a spinneret 2, an inner funnel 4- and an outer funnel 5, see also the enlarged view in Fig. 2o The spinneret 2 is with a number narrow outlet openings 3 ¹ provided, each of which has a bore diameter of z * W · 0.8 mm in the case of the production of copper oxide ammonia threads ·. The ^ö pinnlösung is supplied from a spinning pump designed as a metering pump 1st and feeds through a filter and a supply pipe of a container, the spinning solution a Sinlaßrohr 21, a stopcock 20 is provided old, and having a Drosselitelle 22 to which the interior of the

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Connecting spinneret 2,

The spinneret 2, the inner funnel 4 and the outer funnel 5 are arranged concentrically to one another. The inner funnel 4 is arranged at a vertical distance A below the spinneret 2, measured from the underside of the orifice plate 5. » which is provided with the outlet openings 3 *, up to the upper end of the inner funnel 4. The outer funnel 5 is arranged in such a way that it encloses the spinning nozzle 2 and the inner funnel 4 with a noticeable annular space. The inner funnel 4 consists of the actual hopper 4a and a tail pipe 4b of reduced diameter projecting from the interior of the outer funnel 5 by a bottom closure 7 passes downward is _β The shutter 7 of a sealing material such as rubber or a similar Fabric, and closes the narrowest lower end of the outer funnel 5 "<- it is equipped at its upper, furthest end 5 & with an inlet tube 6, by I.

a first coagulation bath liquid from a liquid container through a not shown Feed pump is fed.

A device 8 is used to have a liquid braking effect to exercise on the liquid, which is carried along by the squeezed and partially hardened threads that emerge from the arrangement 1 and in the drawing for the sake of simplicity by a single

Line 13 shown shd _o The device 8 works so that a second coagulation liquid is sprayed _o

Fig. 3 shows details of the device 8 _e. This device 8 has an inner guide funnel 9 and an outer, box-shaped housing 10 which is concentric to the funnel 9 and is formed with an inlet opening which is connected to a storage container by a feed pump, wherein the last-mentioned parts are not shown for the sake of simplicity. The inner guide funnel 9 is provided at an intermediate part between its upper and its lower end with an external thread 9a ¹ ', into which the internal thread 10b of the housing 10 engages, which is thereby firmly arranged on the guide funnel 9 with the aid of a nut 4-3 The guide funnel 9 has a funnel head 9a and an outlet pipe 9b which extends downwards concentrically from the funnel head »Around the pipe 9b there is an annular liquid space 10a in the housing 10. The lower end of the end pipe 9b is on its outer circumferential surface 9c, 3, tapered in the shape of a truncated cone, so that a sharp edge ring results at the lower end of the pipe 9c 9c formed a tapered, annular nozzle opening 12. This creates a thin annular jet of liquid 23 on the running bundle of parallel endless threads

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directed by the ring nozzle 12 so enclosed Angle is denoted by θ in FIG. 3. This angle θ can be about 20 - 150 ° as a preferable value

Under the device 8, a lower funnel 14 is fixedly arranged at a noticeable distance. Of simplicity for the sake of the means provided for the fixed arrangement of the lower funnel are not shown in the drawing The same applies to the device 8 »The j

Funnel 14 is shaped in cross section as a cup, the is provided with an outlet opening 14a at the bottom

To 'guide the threads 13 is a stationary Guide rod 15 is provided, which the threads from the vertical deflects in a substantially horizontal direction, so that it has a substantially saddle-shaped, stationary thread guide 16 can run., The rod can also be an elongated roll "

The saddle guide 16 is shown in detail in FIG The guide is preferably made of a ceramic material that is particularly resistant to wear, made of sintered titanium oxide, for example. The guide 16 is provided with a thin thread passage groove 16a on its outer surface formed along the saddle depression, and furthermore with a liquid-receiving blind hole 16b “The guide can therefore from a fixed supply opening 24, which is above the hole 16ß at a small distance, a common liquid on; Urns used for regeneration

1 0 9 8 2 U / 1 7 6 5 -10-

ο Several satellite guides of this type can be used in one Row along the thread path that extends between guides 15 and 16 »

FIG. 5 shows a pair of co-operating rollers 17 and 18 equipped with blades. These blades are designated in detail by 17a and 18a, respectively The rollers 17 and 18 serve to shake out the fed threads, that is, the threads are fed in their tensioned state and, by the action of the cooperating blades 17a, 1 $ a of the rollers 17 and 18 are shaken in such a way that they are that it is in a loosened state and corrugated or fall loop manner onto a moving, permeable endless belt 19, may preferably a wire mesh belt or a perforated belt to be ₀

The blades 17a, 18a and the associated rollers 17, 18 are preferably made of stainless steel. The blades are provided with sleeves 25 made of a flexible material, the ZoBo can be rubber or plastic material. After practical tests it has been shown that equipping each blade 17a, 18a with a flexible one ocfer elastic sheath 25 for the purposes of the invention is very beneficial »The threads piled up on the running first tape or hair dryer 19 are used as a whole by the fact that they permeate to a second

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Conveyor 27 are brought, which is also preferably from an endless wire mesh belt or a perforated one Band exists.

Several common aftertreatment areas 28-39 are discussed below along with the operation of this facility explained

A common spinning solution, e.g. one that is used for the | Production of copper oxide ammonia threads is suitable is fed through the line 21 to the spinneret 2 and ejected through the spinning orifices 3 '.

At the same time the Erimar bath fluid is in this Trap heated water, which is kept at 20-60 ° C, is supplied from inlet 6 and flows through the interior of the funnel 4 in a ratio that is about 0.2-0.6 no per kg of threads corresponds to "

Of course, other types and flow rates of primary bath fluid can be used to carry out other types of wet spinning processes that deviate from the one described here *.

The threads 13 are joined by the end piece of the tube 4b discharged with the downward flowing Erimärbadiquid in the liquid braking and spraying unit 8 and to ' Bore of the inner funnel 9 out. At the end of ·

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2059 Ί 77

Thread passage through the unit 8, the threads are carried by a thin beam in ^ orra of a film-like ring the secondary coagulation bath fluid is applied, which in turn is heated in this embodiment Water, which is kept at 40 - 95 ° C and in is supplied to an extent of 0.3 - 0.8 nr per kg of threads »

The included angle θ of the conical annular Badflüssigkeitsstrahles is generally about 20-150 ° ₀ The feed rate of the filaments can be readily 400 m / min, or even more betragene

It is very, important that the vertical component of the sprayed on The beam is chosen to be considerably smaller than the running speed of the threads, so that the Primary bath fluid is exposed to a significant fluid braking effect at this point, which is caused by the beam is exerted.

If this measure is not used, the liquid carried along would hit the liquid, which is contained in the lower funnel 14, and thereby disturb this liquid sump. This liquid sump is of course kept at a constant level in the funnel, for which purpose an overflow device, not shown is used, a supply device for the bath liquid can also be provided to the funnel 14 with the second bath liquid or another

- 13 -

To supply liquid, although the inlet port and the supply means in the drawing for simplicity and have been omitted as per se known a ± nd _e When the liquid is applied in the hopper 14 in such a disadvantageous manner by entrained liquid enter into this area yarn breaks, or the production of fluff masses is subsequently increased considerably. This is one of the main causes of a substantial increase in the spinning speed |

so far not seemed possible. By using the liquid braking described above, the entrained Bath liquid enter the liquid sump of the lower funnel to an astonishing extent and ensure sufficient and uniform coagulation of the threads that are subjected to the curing process are·

The threads hardened in this way are from the bottom opening 14a of funnel 14 along with the downward flowing combined stream of primary and secondary bath liquid submitted.

The rod 15 is used to deflect the threads on their further way and for the separation of compassionate bath fluids * This rod 15 has been referred to as stationary to simplify the description, but it can be designed as a rotatable or movable device with a liquid cleaning device

tO $ ftn / 176S -

is equipped in order to remove the deposited copper ,, Thereby, the entire surface of the Führangs- rod 15 always in a clean, pure state held "Such spin-roll devices and the serving for cleaning devices, however, are known per se _f s ο that detail in the Drawing are not shown "

After the distraction of the route and the physical Separation of the bath liquids carried along are the Threads conveyed to a saddle guide 16 so that they run along in the narrow channel 16a «On this way the threads that form a bundle are in contact with brought a bath liquid, which is preferably of the same type as the liquid of the secondary bath and continuously supplied from a supply source (not shown) through a nozzle 24 to the receiving opening 16b will. The liquid then collects automatically in the area of the thread guide path 16a due to the special saddle shape of the guide 16 · The final Coagulation of the running threads is carried out, as indicated only in a simplified manner in FIG. 1, in FIG. 4 However not.

The so coagulated threads 13 are between the with Shovel equipped loosening rollers 17 and 18 out. As a result, the threads are subjected to vibration,

so that under the effect of the mutually interlocking

gripping blades 17a and 18a in space receive a waveform 13a, Fig. 5i . The area of the threads 13 is therefore kept under tension by subjecting the threads to a considerable frictional resistance which is formed by the partial interlocking of the blades. However, the further running area 13a of the threads is completely loosened. "The pair of rollers 17j 18 therefore acts in the above-mentioned sense as a converter for the state of the threads." The threads 13a are then completely loosened

State up to date permeable first conveyor deposited · The rollers 17 and 18 are rotated in the opposite direction, as indicated by the small arrows? and Q is indicated, so that they promote the continuation of the loosened threads 13a downwards.

It should be noted that if the rollers are made of a rigid, hard and chemically non-attackable material, like stainless steel, the threads get caught on the roller blades as the threads run through the bath |

liquid are wet and tend to adhere to any rigid part when they come in contact with it * This adverse phenomenon occurs in the case of thin threads stand out even more when working with a bundle than in the case of a sliver. Based on these The phenomenon is that thread breaks are observed more frequently at a noticeably increased running speed of the threads If only a single thread is looped around a shovel and is set in rotation with one of the treatment rollers 17 or 18, other remaining threads are in the way

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contracted, as if pulling on a cobweb with the end of a finger o In such an event the entire work process in the treatment plant can be disrupted considerably. Under extreme conditions the system must be stopped in order to be put back in order "

When observing the loosening rollers in connection with the thread bundle by means of a high-speed camera It has been found that there are two groups of materials for the blades, one group being the carried one Fluid cannot be driven off by centrifugal force, while with the other group of materials an effective liquid separation effect is ensured due to the centrifugal force o The first group contains steel and similar metal materials, while the second group includes semi-soft and elastic materials, such as rubber, plastics and the like. Based on the knowledge gained in these experiments, the Shovels 17a, 18a provided with elastic sleeves 25 " If the blades are made of a semi-soft resilient material, such as rubber, it should be observed that that droplets are continually and effectively removed from the outer edge of each vane under the influence of the high speed rolling roll to be thrown off; that can be done by a high speed Confirm working film camera. Other materials that can be used for this purpose are soft polyvinyl chloride,

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soft silicone resin and similar elastomers «In this way, the adverse appearance of. that the threads get caught, completely avoided and a better result can be achieved _o

The so shaken, loosened and wave-shaped threads 13a are deposited on the upper run of the conveyor 19 in a thick, loose layer, the thickness of which can be changed by changing the running speed of the primary conveyor 19, which can also be referred to as a converting device for the thread layer «. The threads run on the conveyor 19 in the direction of arrow Bo parallel to the lower run, see arrow B ¹ , and at a small distance therefrom a larger and longer conveyor 27 is arranged, whose conveying run runs in the direction of arrow C, which with the Direction B ¹ coincided. This conveyor is also provided with known means for changing its running speed «

Above the conveyor 19 is a very simplified illustration Liquid injection device 26 arranged for the preliminary Establishing the shaken state of the thread layer 13a formed on the first conveyor is going to spray a liquid. This is the eased Thread arrangement fixed by adding an appropriate amount Liquid is distributed over it »

As Fig. 1 indicates, the secondary conveyor 27 extends over

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the entire running area of the primary conveyor, and the loosely structured thread layer 13a is transferred as a whole and without any disturbance to the upper run of the secondary conveyor 27, which guides the thread layer through a series of post-treatment areas 41 and 4-2 ₀

The area 41 has a running endless wire mesh belt, which is shown only in an extremely simplified manner, and includes a common acid treatment section 28, a cold water washing section 29, a hot water treatment section 30, a dewatering section 31 j, a widening section 32 and a deswelling section 33 ° Two pairs of guide rollers 31 and 33 are provided within the area 41, which guide the conveyor 27 in FIG lead appropriately.

A similar endless conveyor belt 42 forms another area which includes a tunnel drying section 34 and a humidifying section 35 includes. Behind the section 35 a test section 36 is provided for the acceptance, which can consist of a photocell system, not shown in detail.

In addition, warping or slip sections 37 and 38 are provided, to an effective winding of the appropriately aligned threads by a winding device 40 after Passage through a lubricating and bundling device

109Ö2X / 176S - 19 -

to enable «In the side view, the loosely structured, mat-like layer 13b is shown only by a single line where, each d ± _e main components 1, 8, 14 ·, 15, and 17, 18 contains.

The endless belt 4-1 forms a kind of cleaning cover net or |

-cloth and the next endless belt 4-2 a kind of dry net or cloth These cover nets effectively press with their lower trunk onto loosely structured, mat-like surfaces Thread layer 13b, in the corresponding areas 4-1 and 42 is on the secondary conveyor 27. This protects the layer against being poured over with the various cleaning liquids and through the air movement of the drying fans (not shown) Layer arrangement is disturbed.

The description shows that the threads are successively fitted out, coagulated and then after-treated until they on cone or cross-wound bobbins or similar, sales— capable form have been wound, the process constantly at high spinning and treatment speed of about 500m / min. or even more expires.

example 1

A copper oxide ammonia prepared in the usual way

109 824 / $ 176 --20 -

Cellulose spinning dope having a cellulose concentration of 10 wt _o #, an ammonia content of 7 »2 wt _o $ and a copper content of 3.6 wt"# exhibited, was used in the manner described above and spun into a copper spun yarn The total denier was 60, the denier of the monofilament was 1.3 ,,

The upper funnel arrangement was supplied with a primary bath liquid for hardening at 42 ^° C. in a throughput of 0.32 nr per kg of threads θ of the beam was 60 °. The feed ratio

ο

the secondary bath liquid, which was 80 ° C., was 0.5 m per kg of threads «, in this way the liquid carried along could be transported without any noticeable exposure to the liquid supply which was present in the lower funnel 14 »The - · was thrown by touch with an alignment pin 15 of the movable type from the Liquid separated »The threads were immersed on the saddle guide 16 with an aqueous 10 $ Sulfuric acid solution and then passed on to the passage between the pair of shaking paddle rollers « The Hüllm25 consisted of natural rubber with a hardness of 60 degrees The rollers ran at 397 revolutions per minute I5OOO operating hours effectively and continuously used

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be without any appreciable extent in thread breaks., occurring and / or Fiaummassen generated, based on the total number of spinning units ₀

The threads thus loosened and changed in their position and applied to the second conveyor 27 were further treated in the manner explained above and finally wound onto cross or cylindrical bobbins. The thread properties were not changed in any noticeable way 2.0 g / d, a dry elongation of 11, 5 $ ι a wet strength of 1.4 g / d, a. Wet elongation of $ 18.5, a generation of fluff races from 0.5 to 10 nu. That means an extremely favorable result compared to copper threads produced in the usual way ₀

When increasing the spinning speed to 500 - 1000 m / min <>

have the distance L ^, see Figo 7, measured from the * lower end of the inner funnel 4 to the uppermost part of the combined device 8 for the hydraulic Braking and the spraying of the second bath fluid, and the conditions of the first bath liquid, such as the Feed rate and temperature, proved to be important to the number of yarn breaks and the generation to bring down masses of fluff to corresponding minimum values. »

On the other hand, the length L ^ "Fig. 7" is also measured between the lowest part of the device 8 _t and the

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Delivery height of the movable deflection rod 15, Fig? 1, as well as the conditions of the second coagulation bath liquid such as feed rate and temperature are very important »

The combination of L. and the conditions mentioned together with this size essentially influences the spinning ability of the threads. The second combination of Lp and the sizes mentioned in connection therewith essentially influences the coagulation properties of the threads. The ratio lp / l ^. must preferably be chosen with about 1-5; I. ,, and I ₂ are shown in Fig. 7 »dp, see Fig» 8, must preferably be = » ά * / 2-ά,. / 5 »

In the associated upper area of the spinning unit with this relationship of the sizes d ^., D ₂ , l ^ and I ^, the coagulation of the threads can be suppressed to a minimum and the spinning solution can be used to stretch the ejected threads evenly while taking into account the economic efficiency of the manufacturing plant, the feed rate of the primary coagulation bath should preferably be reduced to a possible minimum and the operating temperature of the bath should be brought to the lowest possible value »

If the intention is to coagulate the threads within the spinning area to a noticeable extent, the operating temperature of the primary bath liquid must be increased to a certain extent. Leading

109824 / 176S - 23 ~

but actually to generate precipitation deposits on the inner wall surfaces of the outlet pipe of the inner funnel through the connections separated from the threads. If this occurs, a continuous and efficient spinning operation can be considerably disrupted if the device has been in operation for a considerable time _e In addition, uneven stretching can occur in the |

show produced threads «,

The operating conditions within the inner funnel Must be maintained, can vary with the spinning speed used, the composition of the Spinning solution, the total and the individual thread denier number and Change similar data “For spinning copper oxide ammonia filaments with a spinning speed of 500 - 1000 m / min, but can preferably be those given below Operating ranges are used for each factor c

d ^ = 15 "- 50 mm; I ₁ = 4-0 - JOO mm; d ₂ = 3 - 25 mm; I ₂ - 40 - 1500 mm; supply of the first bath liquid: 300 - 3000 cnr / min · working temperature of the liquid : 20 - 60 C,

It is of course desirable and recommended that the Coagulation has essentially ended when the threads have run over the distance Lo *

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Although the operating conditions with which this goal can be achieved, depending on the respective spinning speed, the composition of the spinning solution, the total and individual thread denier number, the conditions in the inner funnel and the length L _x , can be changed in the above-mentioned sense the spinning of copper oxide - ammonia threads, at a speed of 500 - 10000 m / min, preferably the following data are used:

Secondary bath liquid temperature: 40 - 95 G Feed rate of this liquid: JOO - 3000 cm

The bore diameter d ^ of the funnel 9 must ^be chosen so that the threads cannot come into contact with the bore wall surface during the passage. For the hydraulic device 8 it is also necessary that the annular cone jet must be aligned with the downward thread group as the center. By using this hydraulic braking measure, the downward speed of the threads can be dampened to a noticeable extent »For this purpose, the angle θ must preferably be chosen to be 20 - 150» The recommended ratio of the liquid jet speed of the second bath liquid to the spinning speed has already been mentioned above.

In Figs. 10-14 several embodiments are shown, in which, by using a single or multiple jet devices, one or more jet streams can be delivered in a concentric arrangement, ^

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Figures skid from the graphic representation in theirs Structure and how it works is easily understandable

The relationship between the degree of ammonia separation in percent or the spinnability, expressed by the critical spinning speed, and the length L _x . is illustrated in FIG

16 shows the relationship of these characteristic I.

Values for length L ₃₀

Fig. 17 shows the relationship between filament tension and L ^ e

18 shows the curve of the spun thread tension in relation to L ₂ O

In FIGS. 15 - 1-8 illustrated experimental results show that the values for L. and L ₂ are substantially the spinnability and the coagulation of wet-spun and coagulated en threads influence "To increase the spinning speed, the length L _x has. preferably, generally speaking, be increased. On the other hand, the length L ₂ must be increased accordingly in order to increase the coagulation capacity. .

To avoid sudden coagulation of the filaments, two or more bromine spray devices can be used in series

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be arranged one after the other on the path of the threads <> This allows different bremsbeams in two or more stages and can be applied under different spraying conditions,

Show the example illustrated in FIGS. 17 and 18 data indicate that through proper selection of the values of L ^, and Lp a previously advisable increased spinning speed of 500 m / min or more can be realized _o This results in an ammonia separation, which is more than $ 80, and a green or unworked thread tension of 20g or less

Comparative example:

A in the usual manner prepared cuprammonium cellulose spinning solution with a cellulose content of 10 wt. ^, An ammonia content of 7 »2 wt _o # and a copper content of 3.6 Gewo # was wet by conventional comparison spinning units spun" The units are in 19 and the results shown were compared with the work results obtained according to the invention. The comparative figures are given in Tables 1 (A) and 1 (B) as a continuation of the first table at the end of the description.

When evaluating the test results must be taken into account that the threads according to the invention with a Spinning speed had been produced, which had been selected from a range of 500-800 m / min and

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-27 ** -

IT " *""" Pll 1 "WFIIP Il Il 111 ι ι

- 27 - '

Accordingly, in comparison to the usual ratios, the coagulation ability is completely comparable with the values obtained by known methods. The strength and drawdown were similar to values obtained in conventional methods ₀ The amount of fluffing reached very favorable values "

Numerous modifications and variations of the embodiments described here are possible within the scope of the invention. Instead of the shells 25, Z ₀ B ₀ coatings of the blades with an elastomeric material can be used «

For tables see pages 28 and 29

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! PABEITLE 1 (B)

Type of spinning process Thread tension (g) 500 invention 700 800 State of the art 100 ÜSPS No.
3049755 150 Conditions ^ "\ ^
and thread- ν. Ι
features ^ - ^ Removal of the
Ammonium (#) 8.0
t 15.0 18.0 Japan. Patent ver
publication no.
115/1956 16.0 100 8.5 thread
own
societies Dry strength
(£ 5/4) 5
!
i
i 600 84 85 40 60 78 8.0 80 Dry elongation I 2.2 12.0 2.2 2.0 11.0 13.0 2.0 82 1.9 Wet strength
(g / d) i 84 11.4 9.3 85 80 12.0 2.1 8.5 Wet elongation
(*) j 1.1 2.1 1.0 1.1 2.3 2.0 1.2 11.7 1.1 Ϊ18.7 10.3 15-3 13.4 14.0 12.5 17.0 1.2 11.0 1.2 1.4 1.3 17.0 17.5 22.0 18.0
I.

Type of ί SOinp conditions * Spinning
* ■ speed 500 ΦΑπΕΤ.Τ.-R Λ CL)
invention 700 800 ■ 800 State of .11> / Ί 95b technology 150 3pinn process and thread
Properties] speed 190 190 190 600 Japan. Patent 60 100 120 300 300 300 4-5 open, 400 400 USPS 3049755 150 lo (mm) 70 600 70 70 1600 40 - - 130 ^ v.mm; - 190 - 80 400 130 150 100 200 800 300 '800 2400 - - - 120 400 L ₁ (mm) 400 70 600 100 150 240 150 - Spinning condition
worked 40 - 4 ₅ - - - 130 35 Primary bath
Temp. (° C) 1100 800 1500 50 ⁼ 27 35 200 350 Feed speed
of the bath (cc / min) 75 400 80 - 350 500 400 50 Secondary bath
Temp. (© Ο) 1100 45 2000 15th - - - 350 • Feed speed
of the bathroom 1200 300 - - 33 80 - 300 1500 - 45 300

Claims (11)

PATENT CLAIMS η J Process for producing continuous threads with a spinning and curing stage and an aftertreatment stage, characterized in that a stage is provided between the spinning and curing stage and the aftertreatment stage in which the threads arriving in a state of considerable tension are continuously mechanically acted upon and the state of tension is converted into a state of loose wave form, in which the threads are deposited as a loosely structured, mat-like layer on a running, permeable conveyor and are then subjected to the aftertreatment. 2. The method according to claim 1, characterized in that the threads between the output of the spinning funnel and before leaving the spinning device are subjected to hydraulic braking, which the Delayed the speed of the downward flow of the bath liquid carried along by the threads. 3. The method according to claim 2, characterized in that one concentrically on the downward running threads Liquid is sprayed on, the speed component of which is considerably lower in the downward direction than the running speed of the threads is maintained. - 31 109824 / 17S5 - 3 * - 4. The method according to claim 3 »characterized in that a bath liquid which promotes hardening is used for the liquid, which in the case of the concentric Spray forms a cone angle of about 20-150. 5. Device for wet spinning of endless threads with a Spinning and curing unit and a post-treatment unit, characterized in that between the spinning and curing unit (1,8, 14, 16) and post-treatment g unit (41, 42) the path of the threads between a pair of rollers (17, 18) passes on its periphery are provided with essentially radially extending blades (1? a, 18a) which have a layer (25) wear an elastomeric material and partially interlock when the rollers rotate in opposite directions. 6. Device according to claim 5, characterized in that i that the blades (1? a, 18a) with covers (25) made of rubber ^ or similar material are provided 7. Device according to claim 5-6, characterized in that a conveyor with a permeable belt (19) is arranged _{below the pair of rollers (17 1 18).} 8. Device according to claim 5-7 »characterized in that that at a distance from the exit end of the spinning - 32 109824/1765 Funnel (4a) and the outlet end of the spinning device (14a) around the thread path spray nozzles (12) are arranged, which are directed obliquely to the thread path and with a feed line for a metered feed a bath liquid are provided. 9. Device according to claim 8, characterized by an annular nozzle (12) surrounding the thread path. 10. Device according to claim 5-9 »characterized in that that the thread path between the exit end (14a) of the spinning device and the pair of rollers (17, 18) via a Groove (16a) leads in a saddle (16) which, next to the groove, has a receiving opening (16b) for a liquid has, for the supply of which the mouth of a feed line (24) is arranged above the opening. 11. Device according to claim 5 - 10 * characterized in that that the outlet section (14) of the spinning device is designed as a cup-shaped container for a bath liquid which is at a distance below the ring nozzle (12). L e e r S e 11 e