DE2437918A1 - Knitting yarn dyeing process - with dyestuff fed to yarn as it is formed into stitches by the knitter - Google Patents

Abstract

In a process for intermittent yarn dyeing or finishing, the dye or finishing fluid is applied to the yarn while it is being formed into stitches on a knitter. The process allows a knitted fabric to have an appearance as if composed of space-dyed yarns, whether of natural or synthetic fibres.

Description

Method and device for dyeing and / or finishing in sections Yarns dyed in sections of textile fibers can thereby be produced by known methods be obtained that the yarn is first processed into a knitted fabric that is dyed or printed irregularly, if desired in several shades of color and then wound up again. This procedure is called "nit-de-knit" method has become known. The thread printed in this way in sections becomes referred to as space dye yarn and used in particular in the tufting industry.

When dyeing or printing mesh structures, especially large meshes Circular knitted, difficulties arise because the knitted fabric is not dimensionally stable is. In addition, no method is known to date, circular knitted fabrics in one operation to be colored or printed over the full curve.

So far the treatment has been carried out so that either the knitted tube was put together exactly and in the first step one and in the second Operation the other side has been treated, or that the knitted tube has been cut open and then treated across the entire width became. The slicing the knitted tube is not desirable in all cases, for example when the printed knitted fabric does not represent the end product, but rather fluted again is to be used in order to produce a different type of textile presentation, like it z. B. is required in the above "knit-de-knit" method. However expensive a yarn produced in this way is mainly due to the very expensive paint application units, such as padding to produce a ground color as well as a double printing unit, which the tube is printed in two more 3 steps by the two second ones.

In contrast, the method of the present invention allows one continuous implementation of the dyeing and / or finishing of trick hoses. The treatment agent is applied during the formation of the knitted fabric or knitted, d. H. that only one unit is required for knitting and application0 The order can be carried out by any method, e.g. B. by wetting, soaking, spraying, Nozzling or dropping of solutions, dispersions or emulsions or printing or patting of color pastes or impregnation or application of foamed Fleets.

This process gives a space dye yarn, which depending on the Patterning and selection of dyes is similar to that made by the well-known space dye process was produced. If a pattern is to be obtained, naturally in each case various dye solutions, dispersions, emulsions, pastes or foams to use that are applied side by side or in whole or in part one above the other resulting in extremely interesting effects, depending on how wide the individual order zones can be selected and the extent to which these order zones can be selected can shimmer.

Similar effects can be achieved if the knitting head does not dye Substances are applied that affect the affinity of the textile material used change with respect to certain dyes, such as known reservation agents (space-treating process), especially z. B. for polyamide fibers wet fastness improvers O According to the Treatment with such agents is fixed according to known methods and then with various specific dyes, such as disperse and / or acid dyes and / or dyed basic dyes, resulting in a colorful patterned textile.

According to the new process can be all natural or synthetic Fibers are treated, e.g. B. fibers made of cellulose, wool or silk, made of polyamides or polyesters, which can be acid-modified, made from polyacrylonitriles, polyolefins or polyurethanes.

All of them for the fiber type in question are suitable for the new process suitable dyes or finishing agents, e.g. B.

Direct, acid, metal complex, pickling, reactive, vat, sulfur, Disperse and basic dyes as well as the naphthol to be formed on the fiber and phthalocyanine dyes. Examples of these dyes are described in Color Index, Third Edition, 1971, Vol. 4, under the C.I.

Numbers: 14 69o, 17 o65, 17 o67, 18 835, 62 o6o, 62 105, 11 085, 42 030, 51,000, 53 160, 53 235, 11 435, 11 855, 12 790, 24 555 and 18 155.

Finishing agents such as optical brighteners, Synthetic resins, finishing agents, antistatic agents and dirt-repellent agents are applied will.

There is an advantageous embodiment of the method according to the invention in foaming the liquor with the help of a flammable gas on the textile material apply and then burn off the gas. This procedure has the advantage that the stitch formation, the application of the liquors and the drying are continuous can be done in one operation.

The preferred combustible gases are methane, ethane, propane, butane, Ethylene, acetylene, luminous gas, natural gas or hydrogen are used.

Another object of the invention is a device for simultaneous Knitting and treatment with liquors containing dye and / or finishing agents. Embodiments of such a device are shown in FIGS. 1-3.

The device is characterized in that inside the fixed cylinder (1) of the knitting head, which is mounted on a table (2) is, channels (3) are through which the respective liquors (4) or foams (18) can be directed (Fig. 3 b), or that between the fixed cylinder (1) of the knitting head and the resulting knitted tube (Fig. 1 c) separate feed lines for which liquors and foams are installed. These feed lines open into a horizontal installed pipe (5), which has one or more rows of holes, openings or spray nozzles (6) (Fig. 1 a and 1 b) or can be divided into sections, wherein each section can be supplied separately with the liquor or the foam (Fig. 1 c). There can also be several horizontal tubes (Fig. 1 a and 1 b) in different Levels (71) and (72) be arranged one above the other, so that in the different sectors (8) different colors can be produced (Fig. 1 b). In the one labeled (81) Sector will only applied to the fleet (42) and in section (81 + 2) Both liquors are applied so that a mixture of the liquors is brought about here will. The liquor is supplied via leveling vessels according to the hydrostatic principle controlled; this means that the openings (6) for the liquor or foam outlet are arranged in the horizontal pipes so that a pressure drop is compensated will. If the horizontal pipes are attached in several levels, the radius is to keep the following pipe smaller than the former.

Fig. 2 shows another advantageous variant in which the horizontal Pipe sections are designed as spray nozzles (6).

These spray nozzles are connected to each other in the planes (71) and by webs connected to a ring, each ring intermittently of against the other each a drive and (92) can be moved independently, so that the spray nozzles constantly changing the sector. This ensures that shorter or longer ones 'tSpaces' on the thread result in more or less strong overlays of the fleets (41)) and (42) arise, which leads to completely irregular "spaces" and interesting mixed colors.

A preferred device is shown in FIGS. 3 a - d. From a textile package a thread is drawn off and fed to the knitting head. This is unusual Installed hanging way.

A jacket (1o) rotates around the stationary cylinder (1), which is on is attached to a table (2). The thread insertion organs are also located in this jacket (1o) (11) and the system for guiding the needles (12) and the knock-off sinkers (13).

The knitted tube produced during the knitting process is pulled off upwards. The dye liquors (41)) and - (42)) are each via a gear metering pump (141) and (142) pressed into the corresponding foaming units (151) and (152) and over a glass frit (16) by supplying a flammable gas (17) (Fig. 3 d) through the respective glass frits foamed. The resulting Foams (18) are fed through a hose system from above to the slot nozzles (19) performed, as shown in Fig. 1 c, in sectors next to each other in one plane can be formed, the sectors (8) with the respective foams separately be charged.

The foam can be applied according to Fig. 3 b so that on the one hand (182) through channels (3) inside the cylinder (1) to permanently installed slot nozzles (19) and on the other hand (181) to an annular slot nozzle (19), which in a second Level below the permanently installed slot nozzle and by an output (9) can be moved back and forth irregularly. The foam feed is dosed in such a way that the corresponding knitted hose exits the nozzle Foam continuously entrains and the foamed hose enters the chimney (20). The foam is destroyed in such a way that an ignition device (21) the gas contained in the foam is ignited and the knitted tube largely blocks the chimney leaves dried. Then he can do the fixation, washing out and post-treatment usual operations. After the corrugation, a section is created dyed thread which, in the case of Fig. 3b, does not cause any "mitigation" in the final product.

Process in which the application of the dyes and / or textile finishing agents containing liquors on the finished knitted or knitted fabric are for example from the German Offenlegungsschriften 1 610 958, 1 931 418 and 2 214 377 known. The new process has several advantages over these processes. The treatment can be carried out continuously for the entire surface of the circular knitted tube. In addition to the special knitting dyeing device, there are no other units, such as Foulard or double printing unit required for printing the knitted tube on both sides.

Since in the new process for the first time the process of knitting and Order is carried out in an apparatus, is compared to the known methods Significant savings in time and investment achieved. When applying foams with flammable Gases and then burning off the gases an aggregate according to the invention (see Fig. 4) is also a continuous Drying possible in one operation.

Example 1 A filament cable made of poly-c -caprolactam is one Circular knitting machine fed and knitted.

The resulting mesh is shown in Fig. 1 c with the dye liquor 41 or 42 wetted, depending on the zone in which the mesh is formed. The paint liquors are delivered according to the hydrostatic principle via leveling vessels, so that extremely precise liquor dosing is guaranteed and only so much liquor is subsequently delivered becomes how fleet is consumed.

The dye liquors used have the following composition: The C. I. Numbers refer to Color Index, Third Edition, 1971, Vol. 4.

1. 20 g / l of the dye C.I. No. 62045 5 g / l oxethylation product of nonylphenol with 15 mol of ethylene oxide 2. 20 g / l of the dye from 2,5-dichloro-1-aminobenzenesulfonic acid / 1 -Phenyl-3-methyl-5-aminopyrazole 5 g / l Oxäthylierungsprodukt of nonylphenol with 15 moles of ethylene oxide 0 For fixation, steaming is carried out at 10 ° C. for 15 minutes.

After the dyeing, the result is a yellow and blue colored section Thread.

Similar interesting effects are obtained with 1. 15 g / l of the dye C.I. No. 17070 and 2. lo g / l 4-amino-1- / 3-oxy-acetyl-amino-anilido / -anthraquinone-3-sulfonic acid (Na salt) each with 1o g / l reaction product of oleyl alcohol with 40 mol of ethylene oxide.

A thread which is irregularly colored blue-red in sections is obtained after ruffling.

Instead of the dyes mentioned, 1. 25 g / l of the dye can also be used C. 1. o. 1469o and 2.1o g / l of the dye C. I. No. 18835 can be used, where an equally irregular yellow-red colored thread after fluting arises.

Example 2 A filament cable made from polyacrylonitrile which can be dyed with a base is fed to a circular knitting machine and knitted.

The resulting mesh is shown in Fig. 2 a and 2 b with the dye liquor 41 and / or 42, depending on the zone in which the mesh is formed or from which nozzles the mesh is sprayed; the nozzles are in two planes and are moved back and forth at different speeds. Overlay the colors in part, so that a very irregular pattern is created, which creates a "picture" of the final product. The dye liquors are transferred from storage vessels to the Nozzles are pumped, which spray the dye liquor onto the mesh.

The dye liquors have the following composition: 1) 20 g / l of the dye 40 g / l of a mixture of nonylphenol glycol ether and acetic acid ester 2) 20 g / l of the dye 40 g / l of a mixture of nonylphenol glycol ether and acetic acid ester For fixation, steaming is carried out for 10 minutes at 1020C. After fluting, a thread with an irregular red-blue-violet pattern is created in sections.

One arrives at similar irregular patterns if one 1. the C. I. No. dye 48060 and 2. C. I. No. dye. 51005 used, where after fluting, a yellow-blue-green colored thread results in sections.

Example 3 A textured filament tow made from polyhexamethylene diamine adipate is fed to a circular knitting machine and knitted.

As described in Example 1, the resulting stitch is with a Soaked liquor containing 20 g / l of a condensation product of 4,4'-dihydroxydiphenyl sulfone, Formaldehyde and phenol sulfonic acid, 50 g / l gum meal ether (13%) 1o g / l ammonia 25% contains umpteen, with the segments designated with color 2 in example 1 none Fleet received.

After drying and steaming at 10 ° C. for 30 minutes, dyeing is carried out with a liquor containing 0.25 g of the dye C, I. No. per liter. 62045, 0.25 g of a copper complex of as well as 2 g of a reaction product of oleyl alcohol and 40 mol of ethylene oxide and 25 g of the knitted fabric at an acetic acid pH of 4.5.

It is treated in this liquor at 95 ° C. for 90 minutes. Man receives after ruffling, a thread that is irregularly colored in green and blue in sections.

Equally good effects are obtained if the knitted fabric described above is treated as follows: 25 g of the knitted fabric are added to 1 liter of a liquor which has a pH of 4.5 and 25 g of the dye CI No. 48060, 40 g of the dye of the formula and contains 2 g of a condensation product of phenol, formaldehyde, cetylamine and 25 moles of ethylene oxide.

0 It is treated in this liquor for 75 minutes at 98 ° C. and a blue-yellow colored trick. After the corrugation, sections turn blue-yellow dyed thread preserved.

Example 4 A textured filament tow consisting of polyethylene glycol terephthalate is fed to a circular knitting machine and knitted as described in Example 2 with the difference that three rows of nozzles corresponding to three colors are used that oscillate against each other at different speeds.

1) 10 g / l dye CI No. 12790 5 g / l condensation product of naphthalenesulfonic acid and formaldehyde 2) 20 g / l dye of the formula 2 g / l condensation product of naphthalenesulfonic acid and formaldehyde 3) 30 g / l dye of the formula The knitted fabric is subjected to hot air treatment for 60 seconds at 0-21 ° C. and then reductively aftertreated and dried.

The result is a completely irregular yellow-orange-red-violet-blue-green in sections and black patterned thread.

Example 5 A polyhexamethylene adipate filament tow becomes one Circular knitting machine fed in from below in such a way that the knitting head goes down is installed hanging and the resulting knitted tube up through a Chimney is withdrawn. It is now the foamed dye liquor during the mesh formation offered and foamed onto the knitted piece.

The dye liquors used contain: a) 50 g / kg of the dye CI No. 62045 50 g / kg oxyethylation product of nonylphenol with 15 moles of ethylene oxide 50 g / kg acetic acid 6o% ig loo g / kg ethanol 750 g / kg water b) 50 g / kg of the dye of the formula 50 g / kg oxyethylation product of nonylphenol with 15 moles of ethylene oxide 50 g / kg acetic acid 60% 100 g / kg ethanol 750 g / kg water These liquors are foamed with a gas volume of about 85% butane gas.

The knitted piece is pulled off upwards and the foam in the overlying area Chimney lit so that a dry knitted hose leaves the chimney. The dye fixation takes place according to a conventional steaming process. The result is an intense yellow, blue and Green thread dyed in sections after fluting.

Claims (1)

Claims 1.) Process for dyeing and / or finishing yarns in sections, characterized in that the yarn in its further processing on knitting or knitting machines during the loop formation with which the dyes and / or finishing agents containing liquors treated. 2.) A method for applying coloring media according to claim 1, characterized characterized in that circular knitting machines are used. 7.) The method according to claim 1, characterized in that several Media are applied side by side. 4.) The method according to claim 1, characterized in that the Order of the fleets completely or partially covered. 5.) The method according to claim 1, characterized in that the liquor is used as a solution and / or emulsion and / or dispersion. 6.) The method according to claim 1, characterized in that an aqueous or liquor containing organic solvents is used. 7.) The method according to claim 1, characterized in that the liquor additionally contains substances that affect the viscosity and / or the surface tension change. 8.) The method according to claim 1, characterized in that the liquor is applied in the form of foam. 9.) The method according to! Nspruch 1, characterized in that the liquor in the form of foam made with combustible gas is applied and that the gas is then burned off. 10.) Device for carrying out the method according to claim 1, characterized in that it has one or more exit points for the fleet contains equipment, with the exit points in the vicinity the stitch formation. 11.) Device according to claim 10, characterized in that a with openings (6) provided tube (5) is divided into sectors (j and below of the boards (13) is installed horizontally in different levels (7). 12.) Device according to claim 1o, characterized in that it a foaming vessel provided with feeds for gaseous propellant (17) and liquor (4), which is connected to slot nozzles (19) contains, which in the fixed cylinder (1) of the knitting head are installed fixedly or movably, as well as a chimney, in which the propellant is ignited.