DE2638795A1 - METHOD OF MANUFACTURING ENDLESS THREAD DYED YARN - Google Patents

Description

Patent attorneys Γ Dr. Ing.WaUar Abitz

Dr. Dieter F, M ο rf _{27t Augusfc 1976}

Dr. Hans-Α. Braun's RD-2345

B Munich 68, Pit nzeiuu »ntr. 28

EGG. DU PONT DE NEMOURS AND COMPANY 10th and Market Streets, Wilmington, Delaware 19 898, V.St.A.

Process for the production of continuous thread colored yarn

The invention relates to a bulky continuous filament yarn of different colors and / or different dye uptake capacity produced colored yarn and a method for producing such a colored yarn.

A continuous thread colored yarn is a yarn that is made up of a plurality consists of continuous threads that either have different colors and / or different dye absorption capacities, so that they can be dyed in different colors. The effect of the colored yarn when it is dyed and in a Pile ware has been incorporated is the one that the color of the threads is mainly revealed at the tip of the pile knobs comes regardless of whether the knobs are intact or cut open. The color of the pile fabric then takes on the appearance of colors, which occur at the top of each knob of the colored yarn of which the goods are made. Colored continuous thread yarns suffer, however the disadvantage that the color at the tip of the knobs is either (a) as a result of too complete a mixture of the different colored Threads will be the same or very similar color

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ORiGlNAL INSPECTEp

can. so that the pile fabric looks as if it consists of a monochrome yarn, or (b) it may be too high-contrast, i.e. too vivid or garish, by being predominantly is composed of the colors of the yarn that make up the colored yarn that is at the top of the nubs in the pile fabric can be seen ^ so that the pile fabric is a pepper and becomes salty in appearance. It is difficult to balance the color effect in making the yarn achieve and control.

In ZA-AS 73/3977 a method is described, according to which the continuous yarn colored yarn by drawing together and crimping the component yarns and two subsequent process steps of blending. In the In the first stage of the process of blending, the threads within each yarn are blended together, and in the second In the 2nd stage, the two yarns in which the threads have been mixed are brought together for the purpose of intertwining. The yarn is under tension in each of the blending stages. As for the colorfulness, you get vivid colored yarn as a result of this process, because the intermingling of the threads in each of the starting yarns Mixing together of the yarns is limited.

US Pat. No. 3,811,263 describes the manufacture of a colored yarn from a plurality of differently colored yarns by blending under tension-controlled conditions with the aid of a fluid jet, which likewise limits the mixing. The Buntgarn according to the invention has not only the colors of the component yarns, but also shows various mixtures of such colors, wherein the areas of different colors are eingesprenkelt in the yarn along its length random, so that a pile fabric produced therefrom ⁿ the appearance of individual color points ^u has, which are the colors of the component yarns and are displayed in a colorful background

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are divided, which attenuates the color "dots" and - from different ones Colors are based on different degrees of blending of the component yarns forming the colored yarn. In particular, there is the continuous thread colored yarn according to the invention from a plurality of crimped, practically twist-free continuous thread yarns of different color and / or different dye uptake capacity, which also in relation to each other in the have essentially no twist, each crimped continuous filament yarn in the colored yarn being composed of a plurality of continuous filaments that are mixed randomly from yarn to yarn and thereby yarn-with-yarn mixing areas of random thread length form which are sprinkled randomly between areas of random thread length in which the yarns do not interrelate are mixed. The yarn-with-yarn mixing areas hold the crimped filaments while forming the colored yarn together, and the distribution of these areas in the unmixed areas, as well as the lengths and ratios of the latter make it possible that the colored yarn according to the invention can be processed into pile goods that are practically free of noticeable Stripes and bones is, and which is characterized by the fact that the colors of the crimped filament yarn in the Pile goods are visible but are muted in appearance.

The continuous thread colored yarn according to the invention is after a Process produced in which, by applying tension to a plurality of crimped continuous filament yarns, the different Color and / or different dye uptake capacity and a total titer of at least 400 den which smooths out the yarn crimp in each of the yarns, the yarns under tension adjacent to one another in a jet blending zone 'feeds at a higher speed than they are withdrawn from it, and the threads of the yarn in the Jet blending zone tension-free and randomly from yarn to Jet-blended yarn. ■

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RD-2345

In particular, the invention relates to a method for producing a continuous thread colored yarn, in which a plurality of crimped continuous filament yarns of different color and / or different dye absorption capacity with a Total denier of at least 400 denied under such tension that the threads are essentially smoothed out, whereupon the yarns with the aid of a fluid jet in a jet blending zone are intertwined, characterized in that a tension of 0.5 to 1.25 g / den brings about action to disentangle the threads and align them in parallel before they are mixed, the threads practically tangle-free the jet blending zone, the combined yarns further conveyed with the aid of the fluid jet and draws the colored yarn from the jet blending zone more slowly than it is fed to the zone, so that the yarns when blending are free of tension.

To further explain the invention, reference is made to the drawings.

Fig. 1 is a schematic elevation of an apparatus for Implementation of the method according to the invention.

Fig. 2 is a cut-away perspective view of an embodiment of the method according to the invention used jet blending device.

Fig. 1 shows three bobbins 2, 4 and 6, of which crimped continuous filament yarns 8, 10 and 12, respectively, which are of different colors and / or have a different dye absorption capacity, through a convergence guide 11, a pair of pulling rollers 14 and 18 with the associated separating rollers 16 and 20, respectively. The yarns 8, 10 and 12 become the draw roller 14

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It is fed side by side, whereupon it first moves around the draw roller 14 and the separating roller 16 lying next to one another and then around the draw roller 18 and the separating roller 20, also lying side by side, often enough around so that no slippage of the Yarn takes place on the roller surfaces. The draw roller 18 and the separating roller 20 run at a higher surface speed than the draw roller 14 and the separating roller 16, so that the filaments of each of the yarns 8, 10 and 12 arise their way from the roller 14 to the roller 18 are placed under tension. This tensioning of the yarn causes the crimp in the starting yarns 8, 10 and 12 "smoothed out" with the effect, that the filaments of the yarns are directed parallel and the entanglement between the filaments in each yarn is eliminated will. The draw roller 18 and the separating roller 20 do not run with respect to the drawing roller 14 and the separating roller 16 at such a high speed that the filaments of the yarns are drawn because this is the purpose of the thread crimping in would thwart the starting yarns 8, 10 and 12.

A braking device is located between the pull rollers 14 and 18 22, which consists of a series of brake pins 24, between which the yarns 8, 10 and 12 pass in this way (interweave) that the filaments of each of the yarns are further disentangled. In Figure 1, yarns are 8, 10 and 12 shown as individual yarns as they run through the braking device 22. Ideally, it is desirable for everyone Endless thread of each of these yarns is also present as a single thread, i.e. parallel layers and disentangling of adjacent ones Threads as they pass through the braking device. This parallel position of the threads in the yarn is retained when they revolve around the draw roller 18 and the separating roller 20.

The yarns 8, 10 'and 12 run from the draw roller 18 to the side Side parallel to each other by a water application device

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device, such as the water spray jets emanating from the nozzles 26, whereby the threads of the yarns for the subsequent treatment in the jet blending zone 28, which then in detail is described, are moistened, and finally the colored yarn 29 consisting of the intermingled yarns is on the roller 30 wound.

In the jet-blending zone 28, the continuous threads are randomly jet-blended from yarn to yarn in such a way that yarn-with-yarn mixing areas come together of random thread length forming randomly between unmixed yarn-yarn areas of random Thread length are sprinkled, these areas have such a relationship to each other that made from the yarn Pile fabric has no noticeable stripes or bones and (after the yarns, if they are not already colored, have been dyed) presents a pleasing coloration, consisting of the colors of the individual yarns, muted in a background of color mixtures.

The jet blending zone 28 is shown in detail in FIG. The zone 28 comprises a nozzle body 31 through which a yarn channel 32 and a fluid channel 34 run, which the latter extends perpendicular to the yarn channel 32 to the exterior of the nozzle body. Part of the inlet side of the yarn channel 32 is covered by a yarn inlet guide 36, over the smooth surface of which the parallel yarns 8, 10 and 12 slide close to one another as they enter the nozzle body. The inlet guide 36 also has a curved one Surface 38 that guides the yarns 8, 10 and 12 smoothly into the yarn channel.

In the yarn channel, a jet of pressurized fluid at approximately room temperature comes through the (preferably single) fluid channel 34 of sufficient force to act to the just bs-

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to bring about random mixing of yarns 8, 10 and 12 as described. The narrowing of the inlet of the yarn channel by the inlet guide 36 has the consequence that the channel 34 supplied fluid, which the threads of the yarns 8, 10 and 12 mixed up, predominantly also through the yarn channel on the other side of the nozzle body, «this with the yarn feed The fluid flow in the same direction in the yarn channel has the consequence that the fluid simultaneously has the function that To continue to convey yarn from the draw roller 18 and up to the beam blending keep under tension. When exiting the nozzle body (cf. FIG. 2), the mixed colored yarn 29 forms in with respect to the nozzle body 31 a "cock's tail". The "cock's tail" is an area in which the threads of the yarns are still spread out by the jet of pressure fluid, so that too Here there is still a blending »The colored yarn 29 runs more slowly than the yarns fed to the jet blending zone 8, 10 and 12 and is taken up by the take-up roller 30. It is a crucial feature of the method according to the invention that the surface speed of the winding roller 30 is less than that of the draw roller 18, so that the yarns 8, 10 and 12 do not mix in the jet to be under tension; otherwise the desired random intermingling of the threads would not occur, and one would get too lively Colored yarn.

The number of starting yarns need not be three, as shown in FIG. 1; there are at least two ruffled ones Continuous thread yarn required, but you can also work with a large number of crimped continuous filament yarns, e.g. four or more yarns. The crimped continuous filament parent yarns can be made from continuous filament yarns by processing by any known crimping method e.g.

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RD-2345

• The yarn is given a random curvilinear crimp. Preferably the yarns are heat set. The starting yarn can also be crimped by making it from bicomponent threads exists, the crimping of which comes about due to different shrinkage. Anyway, the threads are in each individual yarn also by the crimping process, especially in the case of hot jet crimping and stuffing box crimping of the output, intertwined with each other. If this link is not removed, find the desired one Yarn-with-yarn-thread mix in the blending zone 28 does not take place. This entanglement is eliminated by tensioning the starting yarns with or without the aid of a braking device (but not stretched).

Examples of suitable bulked continuous filament yarns are in Example XXII of U.S. Patent 3,186,155. Each of those used according to the invention is preferably characterized Starting yarns by a crimp of the same type. Furthermore, the threads of each yarn preferably have at least four Crimp each 2.54 cm, determined by the method of US Pat. No. 3,611,698. The crimp of the starting yarn gives the Colored yarn according to the invention has a high degree of bulkiness.

The total denier of the starting yarns is at least 400 da the colored yarns according to the invention are primarily intended for tufted and woven goods, such as upholstery and carpet goods come. Generally, the denier of each yarn is in the range of 4 to 25 denier. Everyone's share The starting yarn fed to the process for producing a colored yarn can be varied depending on the desired colored effect will.

Although no stretching takes place between the draw rollers 14 and 18, the fact that the roller 18 with

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running at a higher surface speed than the roller 14, a tension applied to the yarns similar to that described above Brings about unbundling and parallelism. The tension applied is generally 0.5 to 1.25 g / denier and preferably 0.75 to 1.1 g / den. The tension can also be generated differently, e.g. by a pair of pinch rollers.

The degree of any deceleration depends on the entanglement, which the starting yarns have, and which can be stretched by simply stretching between the rollers 14 and 18 alone can not be eliminated. The number of brake pins can be 2 to 10; preferably 3 to 7 brake pins are used.

The untwisted and parallel, crimped filaments are preferably in such a state when leaving the roller 18 that the individual yarn threads are can be separated from each other with at most a slight disturbance of the remaining yarn. The relationship between the Threads of a continuous thread yarn can by the cohesion factor that described in U.S. Patent No. 2,985,995 is. Typically, the crimped yarns fed to the draw roll 14 have a cohesion factor greater than 35. Each The lower the cohesion factor of the starting yarns drawn off from the roller 18, the better it is for the purposes of the invention the resulting colored yarn. Preferably, the pulling rollers 14 and 18, if necessary with the aid of the braking device, such a disentanglement that the starting yarns drawn off the roller 18 have a cohesion factor (mean value from the cohesion factors of each starting yarn) of do not have more than 5.

The moistening of the starting yarns by means of the spray nozzles 26 increases the efficiency of the blending achieved in the jet blending zone by, if all other conditions the

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are the same, when sprayed with water a higher degree of mixing is achieved. Any liquid can be used that increases the degree of mixing.

The excess feed to the jet blending zone 28 is preferably at least 4 %. A feed excess of more than 30 % is undesirable. The higher the feed excess in this area, the greater the yarn-yarn intermingling. The preferred range of excess feed is 6 to 25 %. While in Fig. 2 the yarns 8, 10 and 12 are shown so that they are preferably fed to the jet blending zone 28 at right angles and withdrawn from it at right angles and continue in the same direction, the yarns can also be guided on a different path which forms a different or no angle with the entry line into the jet blending zone and the exit line from the jet blending zone. The essential feature is that the take-up roller runs slower than the draw roller 18, so that the desired excess feed is achieved. The conveying effect that the jet blending zone has on the yarn is also important. This enables the threads to spread out and further blend with one another immediately after exiting the outlet end of the yarn channel 32, regardless of the angle at which the emerging yarn 29 leaves the nozzle body 31. The tension that is exerted on the yarns drawn off from the draw roller 18 by the conveying action of the jet-mixing zone is less than the tension exerted between the draw rollers 14 and 18, but is sufficient to draw the yarns off the draw roller 18 while avoiding rewinding to supply the jet blending zone. If the tension exerted on the yarns between rollers 14 and 18 were also present in the jet merging zone, then there would hardly be any intermingling of the filaments.

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RD-2345

The Garneinlassführung has such a position that the inlet opening of the yarn passage 30 to 80% _t preferably from 45 to 60% _t covers. A gas, preferably air, is preferably used as the fluid for mixing. In general, the air is at a pressure of 7 to 14, preferably

from 7.7 to 12.3 kg / cm.

Due to the action of the turbulent fluid on the adjoining disentangled continuous filament yarns in the nozzle body 31 in combination with the sudden release of the tension comes the novel, random confusion described above conditions.

Because the yarns fed to the blending zone are already crimped the fluid jet no longer needs to crimp the yarns, but only to blend them. When the beam the Yarns would also have to crimp, the crimp would be less and the resulting colored yarn would be less puffy because the yarns would be crimped not individually, but together, i.e. with a higher yarn titer, and also the yarn-yarn blending would be less.

Both the starting yarns and that made from them Colored yarns are practically twist-free. The freedom from twist is preferred; however, a small amount of twisting can occur when handling of the yarns come about. Both the starting yarns and the colored yarn preferably have no more than 1/4 Twist and preferably no more than 1/8 of a turn every 2.54 cm. When mixing the jets, it can occasionally there is also the fact that one output yarn crosses the other, what can resemble a twist; however, in view of the irregularity with which it occurs, this phenomenon is not considered to be Twist viewed.

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The procedure shown in FIG. 1 can be modified, provided that the critical process steps of unbundling the continuous filaments of the crimped continuous filament starting yarns are carried out and the yarns are fed to the blending zone with a feed excess. Thus, for example ₀ tensioning are made for the purpose of disengagement of the single yarns in a separate from the Strahlvermengung operation, and the stretched yarn can be wound onto yarn packages and the Strahlvermengungszone be supplied later. The excess feed to the jet blending zone is, if the tensioning and the jet blending are carried out in two separate process stages, preferably 4 to 15 % and if the tensioning and the jet blending are carried out in a continuous process, preferably 6 to 25 % around that of the winding roller To keep the fed yarn under tension, one can use a pair of nip rollers.

The component yarns that make up the sub-yarn according to the invention can be made of threads made of any synthetic polymer, provided that they are dyed separately or can be colored separately due to different dye absorption capacities. The threads of a component yarn can consist of the same or a different polymer than the threads of another component yarn. Different Dye uptake capacity can be achieved in a manner known per se by functional groups, such as terminal groups of the Polymers. The preferred colored yarns according to the invention are made from crimped continuous filament starting yarns composed entirely of polyamide threads or entirely of polyester threads.

To further explain the colored yarn according to the invention a yarn in a device as shown in Fig. 1

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is when there is excess feed to the jet blending zone made by 8.4%. This yarn is made from three crimped continuous filament carpet yarns of different Dye absorption produced, the single yarn take on dark blue, very light blue (almost white) or yellow color when dyeing. These yarns become twist-free after Process according to the invention combined into a colored yarn. If a 9 cm piece of this yarn is made along one side is observed, it shows the following color variations:

Colorful effect

yellow stripe
dark blue stripe
light blue spot

medium to dark blue stripe
narrow yellow stripe
yellow spot
greenish blue spot
narrow yellow stripes
• greenish blue stripe
yellow to greenish yellow spot
narrow light blue stripe
narrow yellow stripe
narrow dark blue stripe
light green blue spot
yellow spot
light green blue stripe
dark blue stripe.

The areas in which the colors dark blue, light blue and yellow of the component yarns predominate are sprinkled in randomly and have random, short lengths. The colored stripes given for the thread are either parallel or in

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at an angle to the axis of the yarn and do not give the yarn a twist Appearance. The parts called spots are so short that they cannot and cannot be called stripes cover the entire width of the yarn from the observation side.

From the above description of the yarn it can be seen that no color pattern is repeated with such regularity that that it could appear as stripes or bones in the goods. The colored appearance of the yarn depends on the side of that the observation takes place. Seen from one side, the color of a single component yarn may predominate, while, if you look at the yarn from the other side, a mixture of colors from the other two component yarns can prevail. On the other hand, when looking at the yarn from above or below, the observer can see both see a color mixture as well as a real color of a component yarn of the colored yarn.

In the following examples, parts and percentages are based on weight, unless otherwise specified.

example 1

The colored yarn is made from three individual yarns = that one yarn is a cationically dyeable polyamide yarn with a total denier of 1225 den, a yarn denier of 19 den and a cohesion factor of 47. The second yarn is a Acid dyeable polyamide yarn with a low amine end group content and a total denier of 1225 denier, a yarn denier of 19 den and a cohesion factor of 38. The third yarn is deeply dyed with acid dyes Bares polyamide yarn with a high amine end group content with a total denier of 1245 den, a denier of 15 den and

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RD-2345

a cohesion factor of 51. Each of the three yarns has previously been crimped in the hot jet nozzle according to the procedure of Example XXII of US Pat. No. 3,186,155. The colored yarn is produced in a device according to FIG. 1. The cohesion factors of the yarns traveling from the draw roller 18 to the jet blending zone are 3.5, 4.9 and 3.0, respectively. The yarn channel 32 in the jet blending zone 28 has a length of 25.4 mm and a diameter of 3.18 mm. The fluid opening has a diameter of 2.36 mm. Compressed air under a pressure of 10.5 kg / cm at a temperature of 25 ° C. and a flow rate of 0.51 m / min is used as the fluid. The feeding speed of the yarn to the jet-merging zone is 682 m / min and the draw roller 18 applies a tension of 1 g / den to the three starting yarns. The braking device has five braking rods. “The yarn is sprayed with 0.18 ml of water per gram of yarn. The excess feed of the yarn to the jet blending zone is 15.07 %. ■

Example 2

The process conditions of Example 1 are used, but only with the cationically dyeable yarn and the yarn that can be deeply dyed with acid dyes with a feed excess to the jet blending zone of 13.33 %.

In both examples, the colored yarns show not only the colors of the component yarns, but also different ones Mixtures of these colors, which are sprinkled in randomly along the length of the yarns. The distribution of yarn-with-yarn mixing areas in the more weakly mixed or unmixed areas as well as the irregular lengths and proportions of the The latter make it possible to use the colored yarns for the production of pile carpets, which are practically free of noticeable Are strips or bones.

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Claims (9)

EGG. du Pont de Eemours and Company RD-2345 claims 1. Process for the production of continuous thread colored yarn, at that by tensioning a plurality of crimped continuous filament yarns of different color and / or different Dye absorption capacity with a total denier of at least 400 denier the yarn threads essentially ■ are smoothed, whereupon the yarns are intertwined with the help of a fluid jet in a jet mixing zone , characterized in that a tension of 0.5 to 1.25 g / den is applied to the threads To disentangle and align the yarns in parallel before blending, the yarns are practically tangle-free in the jet blending zone feeds the combined yarns with the help of the fluid jet and the colored yarn from the jet blending zone takes off more slowly than it is fed to the zone, so that the yarns are free of tension when being mixed are. 2. The method according to claim 1, characterized in that one works with a feed excess in the range of 4 to 30 % . 3. The method according to claim 1, characterized in that the yarn as it emerges from the nozzle body has a cock's tail can form, in which the threads are still spread and mixed with one another by the pressure fluid. - 16 - 709809/1082 4. The method according to claim 1, characterized in that one works with a jet blending zone, the nozzle body has a yarn channel, the inlet end of which is partially from
a yarn inlet guide is covered so that the fluid from the yarn channel predominantly through the opposite end
flows out and thereby promotes the yarn. 5. The method according to claim 1, characterized in that the Starting game have a cohesion factor of no more than 5 after tensioning. 6. The method according to claim 1, characterized in that ■ that the yarns are fed to the nozzle blending zone in the right-hand corner
and subtracted from the zone at a right angle. 7. The method according to claim 4, characterized in that the yarn inlet guide is arranged so that it covers the inlet opening of the yarn channel to 30 to 80%. 8. The method according to claim 1, characterized in that the yarns between tensioning and blending with water moisturizes. 9. The method according to claim 1j, characterized in that one works with a jet blending zone in which only one
Pressurized fluid channel opens into the yarn channel. - 17 - 709809/1062 Blank page