DE2229055A1 - Method and device for the continuous dyeing of yarns - Google Patents

Description

(ATEN ₁ ANWXLTe

DR. E. WIEGAND DIPL-ING. W. NIEMANN DR. M. KÖHLER DIPL-ING. C GERNHARDT 2229055 MÖNCHEN HAMBURG PHONE. 55547i 8000 MÖNCHEN 15, TELEGRAMS: KARPATENT NUSSBAUMSTRASSE 10

June 14, 1972 W 41 187/72

Unitika Ltd.
Amagasaki-Shi, Hyogo (Japan)

Method and device for continuous dyeing

of yarn

The invention relates to a method and an apparatus for the continuous dyeing of different shapes of yarns made of synthetic fibers, natural fibers or one Blending such fibers as filament yarn, spun yarn or crimped yarn at high speed; it relates in particular to a method and an apparatus suitable for dyeing these yarns in several colors.

It is common practice to use yarn in the form of skeins or bundles (packages), such as cheese or cones, to dye in order to obtain uniform dyeing »and there are already a number of devices known which are used for these staining methods can be used. One of the known methods for continuously dyeing yarns is in that one dips a yarn in a dye bath by passing it through the excess dye liquid from the

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Yarn removed using pinch rollers so that only a prescribed amount of the dye liquid adheres to the surface of the yarn, and then the yarn to the The dye is scooped up and heated. Another method is to use a spinning roller to thread a yarn which is partially immersed in a dye bath, brings into contact in order to transfer the dye liquid from the roller to the yarn, and then heated the yarn. The former method has the disadvantage that the yarn is flattened when it gets caught by the squeegee rollers, and it is difficult and ineffective to run the squeegee rollers at high speed to squeeze the yarn evenly. In the latter process, the dye liquid becomes atomized when the roller for applying the dye is rotated at high speed and therefore it is difficult to to dye the yarn at high speed.

In the known method for intermittent staining of Dyed yarns or multicolored yarns are, for example, the following:

(1) A process in which part of a strand is immersed dyed in a dye bath and then another part of the strand by immersion in a dye bath with another Color is dyed;

(2) a process described in U.S. Patent 3,218,654, in which a running yarn is vibrated and in intermittent contact with one along its length rotating roller is brought, which is partly immersed in a dye bath to intermittently apply the dye liquid to the To transfer yarn, which is followed by a heat treatment to achieve exhaustion of the dye;

(3) a method in which a running yarn is intermittent

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with a mechanically operated dye application device is brought into contact, which is moved back and forth over a small distance, to thereby the dye liquid intermittently transferred to the yarn, followed by a heat treatment to exhaust the dye to effect; -

(4-) A method in which a yarn is knitted (knitted) and a desired pattern on the obtained knitted fabric is imprinted; the fabric is then treated with steam or dry heat to set the dye the fabric is deknitted.

However, these methods have several disadvantages. In the method (1), it is difficult to make a yarn with a dyed Making part of a short length because part of the strand must be immersed in a dye bath, and above in addition, the productivity of this process is low. In the method (2), the tension of the yarn becomes uneven and the yarn has a tendency to break. The method (3) has the disadvantage that it is difficult to use the dye applicator operate at high speed and at high speed the dye liquid atomizes · at the Method (4) fringes occur during knitting and undressing or flakes and, moreover, the productivity of this process is low.

An object of the present invention is to provide a method and an apparatus for dyeing yarns that are free are of the disadvantages described above. Another object of the invention is to provide a method and an apparatus for to indicate continuous dyeing of yarns of the desired shapes at very high speed that are made from various Fiber materials exist. Another object of the invention

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finally consists in a method and an apparatus for the production of intermittently dyed yarns or indicate multi-dyed yarns.

The present invention relates to a method and an apparatus for continuously dyeing a yarn. That The method is characterized in that a running yarn is heated to a temperature above the boiling point of a solvent in a dye and heated the yarn by contacting the same with one or more dyes made from one or more dye application devices with one exit opening for the release of the dye, to be stained.

The invention is described below with reference to the accompanying Drawings described in more detail. Mean:

Fig. 1 is a schematic diagram showing an embodiment of the invention;

FIG. 2 is a perspective view of that shown in FIG Dye application device 5>

FIG. 3 is a view explaining the use of two application devices, FIG. 3A showing their arrangement on opposite sides of the yarn and FIG. 3B their arrangement on the same side of the yarn shows;

Figures 4- and 5 are cross-sectional views according to the invention Method of obtained yarns;

Fig. 6 is a side elevation of yarns obtained by the process of the invention;

7 shows a cross-sectional view of an embodiment of a Device for the intermittent discharge of the dye stromes; and

Fig. 8 is a cross-sectional view of the main parts of a dye applicator; from which three different dyes emerge.

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In the pig. 1 of the accompanying drawings, a yarn 2 is unwound from a cone 1, over a guide roller 3 guided, heated by a heating device 4 and then brought into contact with a dye on carrier device 5. On the yarn 2 is using this dye applicator 5 a dye applied. The dye will stored in a container 6 and transported into the dye application device 5 by a metering pump 7. Of the Dye then emerges through a small opening provided in the application device 5. Bach the angry of the dye, the yarn 2 is dried in a drying device 8, guided over a guide roller 9 and onto a Winding device 10 wound up.

The details of the dye on application device 5 of FIG. 1 are shown in Figure 2 of the accompanying drawings. In Fig. 2, reference numeral 13 represents a U-shaped groove through which the yarn 2 passes in contact therewith. Near the central part of the bottom of the TJ-shaped groove is one Dye outlet opening 11 is provided. The dye that is fed through a ^ ear 12, emerges from this opening into of the appropriate amount and is applied to the yarn 2 passing through the groove 13 in contact with the bottom of the groove including the outlet opening 11. The diameter of the Dye outlet opening and the opening angle of the U-shaped groove differ somewhat according to the thickness of the material to be dyed Yarn. In general, however, it is desirable that the diameter of the exit orifice be within the range of about 0.1 to 1 mm and that the opening angle of the groove through which the yarn passes is within the range of about 15 to 145 °.

In Fig. 1 only one dye application device is shown.

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represents »By using two or more dye applicators it is possible to dye a thread with more than one color. The use of two application facilities is illustrated in Figure 3 of the accompanying drawings.

In FIG. 3A, the running yarn 2 comes into contact with one of the dye application devices 5 and the dye is applied through the opening 11 to one side of the yarn. This yarn then comes into contact with the other application device 5 ¹ , which is arranged opposite the application device 5, and a dye of the same color or a dye with a different color than that which is applied by the application device 5 is applied to the opposite side of the yarn 2 is applied. When different dyes are applied, the yarn is dyed in two colors, as shown in cross-section in Fig. 4, and the two colors run separately and continuously along the length of the yarn obtained. Fig. 3B explains the arrangement in which two dye on application devices 5 and 5 ^{1 are arranged} on the same side of the running yarn, with which the same or different colors can be applied to the yarn through the usual outlet openings in the application devices. Accordingly, when three applicators are provided around the yarn, the yarn can be dyed in three different colors, as shown in Figure 5 of the accompanying drawings. When such a yarn is used for ordinary knitting or weaving, twisting (torsion) of the yarn occurs during knitting or weaving and therefore a random-dyed fabric is obtained as a result of the weaving or knitting.

By changing the amount of dye or the arrangement of the Dye applicators can be various if desired multi-colored yarns as in Figures 5A, B and C shown, can be obtained. Fig. 5A illustrates a transverse

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cut through a multi-dyed yarn obtained by the leakage of small amounts of the dye. 5B shows a cross section through a multi-colored yarn in which two adjacent colors are mixed with one another as a result of the escape of large amounts of the dye. Figure 5C shows a cross-section through a multi-dyed yarn containing non-dyed parts as a result of the unevenly spaced arrangement of dye applicators . the yarn around.

If a yarn is made using one or more dye applicators, is dyed as shown in Fig. 2, it is possible to obtain differently colored yarns by changing the amount of dye emerging. So the yarn can be dyed evenly similar to the usual dip dyeing or it can be random-dyed to form a yarn with intermittently dyed parts along its length, i.e. an intermittently dyed yarn or a multi-dyed yarn can be obtained. If e.g. the dye continuously from the opening of the dye applicator emerges, it is possible to obtain a yarn with a continuous part of dye along its length, as shown in Fig. 6A. On the other hand, if the dye is fed and exited intermittently, a yarn can be obtained which is intermittent along its length is colored as shown in Fig. 6B. Any desired dye can be used to achieve an intermittent flow of dye Facility to be applied. One method is to incorporate air bubbles into the dye. For example For example, an air pump can be provided somewhere in the bore for the supply of the dye, with the aid of which air bubbles are introduced will. By changing the amount of air bubbles introduced by the air pump, the distances between the colored parts can be changed according to Y / ug. For the production very fine bubbles, a gas such as air or carbon dioxide is dissolved under pressure in the dye and the bubbles

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These gases can be found in the vicinity of the outlet openings, where the pressure approaches normal atmospheric pressure Dye can be generated. The gases dissolved in the dye can, however, also be converted into bubbles by heating with the effort of the outlet openings. Alternatively, a A chemical that generates gas when heated, such as sodium bicarbonate, can be incorporated into the dye and through Heating them in the vicinity of the outlet openings can generate bubbles.

The interruption in the dye stream can also be through use a device of the structure shown in FIG. 7 can be effected. In FIG. 7, a piston 22 reciprocated in the direction of A by an electromagnet 21. When the solenoid is out of order, will the piston 22 with a dye liquid discharge port kept in contact using a spring 23, thereby stopping the leakage of the dye liquid. The reference number 24 denotes an inlet for the dye and the reference numeral 25 denotes an outlet for the dye. At 27 an electrical wire is shown. The dye stream entering the device through inlet 24 and exiting through the outlet 25 is interrupted by intermittent Actuate the electromagnet 21 so that the piston 22 reciprocates and at 26 intermittently closes and opens.

By leakage of two or more dyes from one Dye applicator alternately or arbitrarily using such a device can be a yarn which is continuously or intermittently stained in two or more colors along its length is as shown in FIG.

In Fig. 8 a yarn 31 runs in contact with the dye

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application device 32, which is shown in detail in FIG the reference number 5 is shown. The dyes emerge from an outlet opening 33 at varying intervals a, b and c with different colors continuously or discontinuously and are repeated in any arbitrary Order of a, b and c or in any order Applied to the yarn 31 (random sequence). The dyes, through the supply pipes 35, 35 'and 35 "into the the dye intermittently releasing devices 34-, 34 · 'and 34 · "have been introduced, lie here intermittently in front of and are dispensed alternately or in a random order through the outlet opening and in this way on the yarn 31 is applied. At this point the stained Parts can be made continuous or discontinuous, i.e. non-colored parts can be produced.

With the usual pad-dyeing, the yarn is on which dye has been applied, treated with steam or in the form of a bundle, e.g. in the form of a cone or cheese, or subjected to a dry heat treatment in the form of a strand, thereby applying the dye to the fibers to fix. However, the steam treatment method has the disadvantage that longer periods of time for the steam treatment are required to achieve sufficient coloring and the efficiency is low. The dry heat treatment has the advantage that the treatment can be ended within a shorter period of time, but the problem still arises the decomposition and sublimation of the dye due to the high temperature used in this treatment. Accordingly according to the invention, the yarn is heated to a temperature preheated above the boiling point of a solvent in the dye before the dye is applied to the yarn will, and then the dye will, if desired also can be preheated, applied to the yarn, then is

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dried and the yarn is wound up. The pre-heating of the yarn contributes to the activation of the molecular motion of the fibers "in and the dye is applied in such a state to the G _a rn, the inner structure of the fiber iqüem are relaxed. This makes it possible the yarn immediately and at high speeds to color.

The heating temperature applied to the yarn prior to application of the dye will vary depending on the type of fiber, but it will usually be higher than the boiling point of the solvent used in the dye and not higher than the point at which the physical and chemical properties of the yarn will become change drastically. If, for example, water is used as the solvent for the dye, a temperature of 70 to 100 ^° C. is suitable. At temperatures below 70 ^° C. , longer periods of time are required for drying and it is impossible to dye the yarn at high speed. The yarn to which the dye has been applied is dried by being passed through a drying device and wound up to complete the dyeing. Usually the dyeing process is finished at this point and post treatments such as washing or lathering are not required. A great advantage of the present invention is that the dyeing • is finished (complete) in this state. If a darker color and high fastness are desired, the wound yarn can also be fixed by means of steam.

In the case of the yarns dyed using the process according to the invention can be any yarns such as spun yarn, continuous filament yarn, or crimped Are yarns made from natural fibers such as cotton, wool or silk, synthetic fibers such as polyester, acrylic, Polyamide and artificial cellulose fibers such as viscose rayon, cellulose acetate fibers or mixtures of these fibers exist

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can. The dye used in the present invention can accordingly suitability for the fibers to be dyed. If desired, a swelling agent can be added to the dye for the fibers, a carrier or a solvent can be added to make the objects of the present invention more effective to reach. The dyeing according to the method according to the invention can be carried out at a rate of up to 500 to 1500 m per minute can be carried out without the tension of the running yarn changing, regardless of whether the yarn has a uniform thickness or knot.

The invention is illustrated in more detail by the following examples, without, however, being restricted thereto.

example 1

A false-twisted nylon 6 yarn (70 denier / 24 threads / 2 layers) was passed through a device as shown in FIGS. 1 and 2 at a speed of 600 m / min ⁰ C held hot plate was used. A dye of the composition given below was passed through an applicator, which emerged from an opening with a diameter of 0.25 mm and was applied to the yarn, and after drying, the yarn was wound onto a cheese mold. The wound yarn was formed into a strand V and for 5 minutes at 110 ⁰ C treated with steam. An intermittently dyed yarn of good quality was obtained.

Dye composition Amount (parts by weight) CI Acid Red 219 50

Ethyl alcohol 400

Benzyl alcohol 40

Water 510

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Example 2

A mis-twisted nylon 6 yarn (1260 denier / 80 threads / 3 layers) was passed through an apparatus of the type shown in Figure 1 in which a heater maintained at 200.degree was used, and 0.1 ecm each of the following three dyes A, B and 0 were intermittently and alternately Dispensed 900 times per minute. Each dye was applied to the yarn at a speed of 350 meters per minute ran. Using the dyed yarn thus obtained, a tufted carpet with a uniform multi-colored Pattern made.

Dye components

Dye-Together
settlement (parts by weight) B. _G A. 8th 16 VJI 2 6th 1 60 60 60 200 200 200 730 718 734

OI Acid Xellow OI Acid Black 64 Benzyl Alcohol 1 Ethyl alcohol water

Example 3

A crimped nylon 6 yarn (840 denier / 80 threads / 2 layers) was at a speed of 500 m per minute through a device of the .Fig. Out type illustrated · 1, was used in the eine'bei 200 ⁰ C held heated platen, and the running yarn was coated with a withdrawal rate of 20 cc / min. applied a dye of the composition given below. During the passage of the dye through a discharge tube, an air pump was used 500 times per. Minute air was introduced into the dye with the formation of air bubbles, whereby the escape of the dye was interrupted intermittently. After drying, the dyed yarn became

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wound on a cheese mold. This was an intermittent Obtained dyed yarn with a good fastness.

Dye composition Quantity (parts by weight) CI Acid Black 58 30

Benzyl alcohol 30

Water 940

Example 4

A polyester filament yarn (75 denier / 24 filaments) was passed over a held at 210 C the heating device at a speed of 700 m / min, and then the dyes A indicated below were, B and heated C to 90 ⁰ C and jexveils in a Eate at 0.8 ecm per minute dispensed by three dye applicators to apply to the surface of the yarn. The yarn was then passed through a non-contact heater maintained ^{at 150 ° C. and wound up.} The rolled-up cheese shape was formed into a strand and treated with steam ^{at 140 ° C. for 5 minutes.} The surface of the yarn obtained was dyed with three different colors of very high fastness. Such a yarn has not previously been producible.

Dye composition amount (parts by weight)

Dye A: __

CI Disperse Yellow 42 "\ 10

Water 990

Dye B: __

CI Disperse Orange 13 20

Water 980

Dye C: __

CI Disperse Eed 100 5

Water 995

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Example 5

A spun wool yarn (Kammgarntiter, 40/3; 100% wool) was passed at a speed of 700 m / min, a maintained at 160 ⁰ C and then heated plate were heated to 65 ° C three dyes in a rate of 16 cc per minute from three dye applicators and were applied to the surface of the yarn. The yarn was passed through a multi-contact heater maintained at 140 ° C. to dry and wound up. The wound cheese shape was formed into a strand and treated with steam for 10 minutes at 105 ° C. When the multi-dyed yarn thereby obtained was used, a weft knitted fabric having a speckled pattern with extreme clarity was obtained.

Dye composition amount (parts by weight)

Dye A: _

CI Acid Yellow 141 6

Benzyl alcohol 60

Ethyl alcohol 400

Water 534

Dye B: __

CI Acid Orange 56 5

Benzyl alcohol 60

Ethyl alcohol. "Voo

Water 535

Dye C: _

CI Acid Bed I3I 3

CI Acid Blue 138 2

Benzyl alcohol 60

Ethyl alcohol 400

Water 535

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Example 6

A spun acrylic fiber yarn (worsted denier, 20/2; 100% acrylic fiber) was passed at a speed of 600 m / min over a heating device maintained at 170 ° C. and from each of three dye application devices, as shown in FIG , the three dyes listed below and heated to 65 ° C. A, B and C occurred at a rate of 23 cc / min. and they were applied to the surface of the yarn. The yarn was dried by passing it through a non-contact heater maintained at 130 ^ and it was wound up. The wound cheese mold was formed into a strand
Steam treated.

formed into a strand and 10 minutes at 100 ⁰ C with laag

Dye composition Amount (parts by weight) Dye A: _

CI Basic Yellow 11 6

Ethyl alcohol 400

Water 594

FaTb ₁ fabric B: _

CI Basic Orange 33 12

Ethyl alcohol 400

Water 588

Dye C: __ "

CI Basic Violet 26 15

Ethyl alcohol 400

Water . 585

Example 7

A spun cotton yarn (cotton denier 20/1; 100 % cotton)

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was passed at a speed of 600 m per minute over a heating device maintained at 170 ° C. and the dye application devices of the type shown in FIG were applied to the surface of the yarn. The dyed yarn was passed, dried and wound up by a held at 140 ⁰ C non-contact Heiζeinrichtung.

Dye composition amount (parts by weight)

Dye A: _

CI Reactive Orange 5 10

water-free soda 10

Urea 100

Water '880

Dye B: _

CI Reactive Blue 17 25

anhydrous soda 10

Urea 100

Water . 865

Dye C: _

CI Reactive Black 6 20

anhydrous soda 10

Urea 100

Water ■ -870

The invention has been described above on the basis of preferred embodiments explained in more detail, but it is not limited to and. it is obvious to the person skilled in the art that this is in can be changed and modified in many ways without thereby departing from the scope of the present invention will.

Patent claims:

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Claims (1)

Claims 1. Process for the continuous dyeing of a yarn,
characterized in that a running yarn is heated to a temperature above the boiling point of a solvent
heated in a dye and the heated yarn with a
or several dye application devices with a dye outlet opening contacted while a dye
the yarn exits through this opening. 2. The method according to claim 1, characterized in that the yarn is contacted with 2 or more dye application devices, the one behind the other around the yarn in
of a type deviating from the running direction of the yarn, the dyes emerging from the dye application devices being of the same or different colors. 3. The method according to claim 1, characterized in that the yarn is contacted with 2 or more dye applicators, which are arranged one behind the other and linearly on the same side of the yarn, the one from each of the
Dye application devices
different color. 4. The method according to claim 3, characterized in that the dye comes out continuously. 5. The method according to claim 4 ·, characterized in that a multitude of different colored dyes alternating or arbitrarily from the same dye application device exit. 2098S3 / 079 0 6. The method according to claim 1, characterized in that the dye emerges intermittently. 7. The method according to claim 1, characterized in that a plurality of different colored dyes intermittently emerges from the same dye application device in an alternating or arbitrary manner. 8. The method according to claim 6, characterized in that the dye by incorporating air bubbles into the dye is released intermittently. 9. The method according to claim 1, characterized in that the temperature of the dye. Within the range of 3O ⁰ O below the boiling point of the '. The boiling point of the solvent. 3O ⁰ O below the boiling point of the solvent up to the 10. The method according to claim 1, characterized in that a dye application device is used in which the Device for applying the dye a U-shaped groove has through which the running yarn is guided in contact with it and where the dye emerges at the bottom of the U-shaped frame Opening is provided. 11. Apparatus for the continuous dyeing of a yarn, consisting of a device for the introduction of a running Yarn, means for heating the running yarn and means for applying a dye to the running yarn, characterized by a dye application device with an outlet opening through which the on the Yarn applied dye exits, and through a device for conveying the dye into the outlet opening, means for drying the dyed yarn and means for winding up the dyed yarn. 209 853/0 7 90 12. The apparatus according to claim 11, characterized in that the dye application device has a device for Applying a dye with a U-shaped groove in it through which the running yarn is guided in contact therewith, with a in the bottom of the U-shaped groove Dye outlet opening is provided. 15. Multi-colored, surface-dyed yarn, characterized in that that it consists of a yarn, the surface of which is continuous or intermittent along its entire length Length is stained. 209863/0790