Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
  • D06B23/24—Means for regulating the amount of treating material picked up by the textile material during its treatment
  • D06B23/28—Means for regulating the amount of treating material picked up by the textile material during its treatment in response to a test conducted on the treating material
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
  • D06B3/04—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments
  • D06B3/045—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of yarns, threads or filaments in a tube or a groove

Definitions

• the present invention relates to a continuous dyeing process for a textile yarn, in particular a yarn made of synthetic fibers, by impregnating this yarn by means of a dyeing solution consisting of at least one basic dye dissolved in a suitable solvent, process in which the wire is passed continuously through an impregnation enclosure containing said solution, then through at least one wiping enclosure by compressed air in which a liquid wiping residue is collected.
• the present invention also relates to an installation for implementing the method, comprising at least one impregnation enclosure followed by at least one wringing enclosure, means for passing a continuous textile thread through said enclosures, and a dye solution circuit passing through the impregnation enclosure and provided with recovery means under this enclosure and under the wringing enclosure.
• the bathing ratio is commonly from 1 to 10, that is to say that for the OOKg of treated products, the bath should contain about lOOOKg of tincture solution. Since the basic dye is expensive, this technique, which is not economical, also poses the ecological problem of disposing of the remaining solution.
• the present invention proposes to overcome all of the drawbacks mentioned above, by providing an economical and precise process for dyeing textile threads, as well as an installation for the implementation of this process.
• the method according to the invention is characterized in that, during spinning of the yarn, said residue is re-spin liquid in the dye solution, one proceeds to a colorimetric analysis' UTOMATIC this solution * , if necessary, a color correction of this solution is automatically carried out by adding appropriate quantities of said base dye and / or of said solvent, these quantities being determined automatically as a function of the results of the colorimetric analysis, and reuse this corrected solution for the impregnation of the wire in the impregnation chamber.
• the dye solution consists of several base dyes dissolved in an appropriate solvent
• an automatic colorimetric analysis of the dye solution is carried out in order to determine the content of the solution in each of the base dyes and the a color correction of the dye solution is carried out, if necessary, by adding quantities of said base dyes, and a color correction of the dye solution is added, if necessary, by adding quantities said basic dyes, determined by a calculation unit as a function of the results of the colorimetric analysis for each of the basic dyes contained in the solution.
• an initial start-up phase of the process is also carried out, in which a colorime calibration analysis of the dye solution is carried out and the results of this analysis are stored in the unit of calculation in the form of reference values, and in the remainder of the process, the results of the colorimetric analysis are automatically compared with these reference values in order to effect the color correction.
• the colorimetric analysis can advantageously be a spectrophotometric analysis.
• the colorimetric analysis is carried out on diluted samples of the dye solution.
• said diluted samples are prepared by introducing a predetermined volume of dye solution into a predetermined volume of solvent and stirring this mixture to make it homogeneous.
• said predetermined volume of solvent is controlled by filling a calibrated container of this solvent to a first level, and said predetermined volume of dye solution is controlled by injecting into the solvent already contained in the calibrated container, of the dye solution until the mixture reaches a second level.
• the installation for implementing the method is characterized in that the dye solution circuit comprises, following the recovery means, automatic correction means for checking and correcting the amount of dye in the dye solution containing the liquid spin residue.
• said automatic correction means comprise an automatic color analyzer coupled to a calculating unit, respective sources of dyes and of solvent, and dosing means controlled by said calculating unit to take determined quantities of dye and / or solvent from said sources and introduce them into the dye solution.
• the color analyzer can be mounted on a branch of the dye solution circuit, and this branch can come from a regeneration chamber containing a determined volume of dye solution. - t. -
• said branch is connected in a closed circuit to the regeneration enclosure, it is equipped with a circulation pump, and said sources are connected to the dye solution circuit by means of this branch.
• the device for diluting the dye solution is interposed on said branch, between the regeneration chamber and the color analyzer, and the regeneration chamber is equipped with heating means, as well as with regulation means. the temperature and / or pH of the dye solution.
• the dye solution circuit is divided into a first circuit passing through the impregnation chamber, and a second circuit passing through the wiping chamber or chambers, the first circuit comprising a recovery disposed under the impregnation enclosure and equipped with means for regulating the temperature and with means for controlling the level of the solution, and the second circuit successively comprising a recovery tank disposed under the wringing enclosure, said automatic correction means and a compensation tank, an output of which is connected to the first circuit through a valve controlled by said level control means.
• Figure 1 is a simplified diagram of the part of a continuous dyeing installation where an impregnation and a. pneumatic spinning of a wire, while the rest of the installation can be of conventional construction,
• FIG. 2 is a diagram similar to FIG. 1, but represents another embodiment
• Figure 3 is a diagram similar to Figure 2, showing yet another embodiment.
• a wire 1 is taken from a spool 2 and it is driven continuously by pulleys 3 through an impregnation chamber _ and a pneumatic wiping chamber 5 which are housed in respective compartments of an enclosure 6.
• the wire 1 is generally deposited in the form of turns on a continuous conveyor which makes it pass through a drying enclosure, then a vaporization oven for thermofixing the dye, before being rewound.
• This non-illustrated part of the installation is known in principle and may be subject to various variants depending on the nature of the wire and the treatments it must undergo.
• the yarn is impregnated with a dyeing solution which is trichrome in the present case, that is to say, it contains a yellow dye, a red dye and a blue dye in the suitable proportions to give thread 1 the desired color.
• a dyeing solution which is trichrome in the present case, that is to say, it contains a yellow dye, a red dye and a blue dye in the suitable proportions to give thread 1 the desired color.
• This solution circulates in a closed circuit which will be described later.
• an excess of dye solution is removed from the yarn by injection of compressed air from a source A through an adjustment valve 7 and a pipe 8. This air is removed from the enclosure 6 by a suction pipe 9.
• the excess liquid escaping from the wire and boxes _ and 5 flows onto the bottom of enclosure 6 to fall into a recovery tank 10, which can, to receive
• a bypass 12 provided with a valve 11 serving to regulate the flow of dye solution passing through the impregnation enclosure _.
• a solenoid valve 13 controls the entry of the liquid into a regeneration enclosure l _ which, in this case, is arranged as a heater containing a steam circuit 15 supplied by a steam source V through a adjustment valve 16 controlled by a temperature probe 17 (the broken lines represent control links).
• the enclosure l _ is associated with a device 18 for automatic regeneration of the solution of dye, device which will be described later.
• the dye solution circuit includes a solenoid valve 20 controlling the outlet of the chamber 14 in a pipe 21, a reservoir 22 then a positive displacement pump 23 which returns the pressurized liquid towards of the impregnation chamber through a pipe 24 and a stop valve 25.
• a solenoid valve 20 controlling the outlet of the chamber 14 in a pipe 21, a reservoir 22 then a positive displacement pump 23 which returns the pressurized liquid towards of the impregnation chamber through a pipe 24 and a stop valve 25.
• the reservoir 22 is also arranged as a steam heater, to bring the dye solution to a temperature as high as possible without it vaporizing and without it altering the physical properties of the thread 1, depending on the nature of the latter. this. This temperature is controlled by a probe 26 controlling a valve 27 for admitting steam V into a steam circuit 28.
• the tank 22 is equipped with a minimum level detector 29 linked to the solenoid valve 20.
• the device 18 for the automatic regeneration of the dye solution is connected to the enclosure 14 by a closed circuit bypass
• ⁇ comprising lines 30, 31 and 32, a circulation pump 33 and a color analyzer 34, coupled to an electronic calculation unit
• This unit receives signals from the analyzer 34 representing respective values of color density corresponding to each base dye. It compares these values with respective reference values and, if it detects deviations, it issues corresponding correction signals on lines 35 controlling respective outlet valves 36 of three (or more) dye tanks.
• basic 37 receives signals from the analyzer 34 representing respective values of color density corresponding to each base dye. It compares these values with respective reference values and, if it detects deviations, it issues corresponding correction signals on lines 35 controlling respective outlet valves 36 of three (or more) dye tanks.
• the unit 34 ′ can also control a valve 40 connecting to the pipe 32 a tank
• This device 18 can be used for the formulation of dye recipes, it suffices to change the set values to obtain different concentrations of dyes.
• the flow of the liquid is discontinuous.
• the valve 13 opens, the liquid wringing residue contained in the tank 10 flows into the enclosure 14 until its level reaches a maximum level detector 13 ′ which closes the valve 13.
• the level in the tank 10 is less than a minimum, it is supplemented by a supply of dye solution coming from a reserve 42, by means of a solenoid valve 43 controlled by a minimum level detector 44.
• the pump 33 then circulates the liquid in the device 18 to control its color and correct it if necessary, while reheating takes place in the enclosure 14.
• the circuit of the dye solution actually consists of a first circuit which is closed and which passes through the impregnation chamber 4, and a second circuit which in fact constitutes the return of the liquid de the spinning enclosure 5 at the reservoir 22, from which the regenerated solution is reinjected into the first circuit as required.
• a recovery tank 50 under the impregnation enclosure 4 comprises a filter 51, a reheating circuit 52 provided with a valve 53 controlled by a temperature probe 54 in order to maintain the dye solution at a high temperature as in the previous example, and a minimum level detector 55 which controls the solenoid valve 43 to complete the level of the bath in the tank 50 from the tank 22.
• the second circuit includes another recovery tank 60 also equipped with a filter 61 and a maximum level detector 62 which controls the opening of the electro ⁇ valve 13 on the exit from tray 60, when this tray contains enough liquid to fill the enclosure 14, which operates as in the previous example, in combination with the device 18 ensuring the regeneration of the dye solution.
• a circulation pump 64 takes the dye solution at the outlet of the reservoir 22 and circulates it in a closed circuit 65 controlled by a solenoid valve 66, which closes when the solenoid valve 43 does not open.
• an advantage of this embodiment is that the temperature maintained in the tank 22 can be a little lower than that of the solution contained in the first circuit, in particular when the latter is greater than 90 ° C.
• FIG. 3 The installation illustrated in FIG. 3 is largely similar to that of FIG. 2. However, in this case, the colorimetric analysis is carried out on a diluted sample of the dye solution, taken from a closed circuit bypass 70 , 71 of the regeneration chamber 14, bypass where the solution withdrawn from a hollow 73 at the bottom of the chamber 14 constantly circulates, using a pump 72.
• the dilution operation is carried out in a container 75 which can communicate with the bypass through a valve 76, with the analyzer 34 through a valve 77, and with a water tank 78 at level Nlconstant through a valve 79.
• This container is surmounted by a S0 calibrated balloon equipped with a detector 81 of a higher level N2.
• the figure also shows a drain valve 82 of the containers 75 and 80, as well as a pump 83 for supplying and purging the analyzer.
• a sample is taken periodically, for example every 2 minutes, on command of the unit 34 'and takes place as follows: the container 75 is first filled with water until NI level via valve 70. Then valve 76 is opened to let in dye solution until level N2 is reached, which determines a constant dilution rate corresponding to the ratio of the volumes of containers 80 and 75 An agitator (not shown) homogenizes the diluted solution, then the valve 77 allows the latter to reach the analyzer 34. After the colorimetric measurement, the analyzer can be rinsed with clear water at the same time as the container 75.
• the calculation unit 34 can control color corrections in the enclosure 14 from four dye tanks 82a to 82d and a solvent tank 83.
• Each of these tanks is equipped with a closed circulation circuit having a pump 84 and a pressure reducing valve 85, to ensure dispensing pressure and constant quality of the product dispensed.
• the output of each of these circuits, in the direction of the enclosure 14, is done through a respective metering device 86 controlled by the unit 34 '.
• the 'metered quantities of dyes o water are injected near the bottom of the enclosure 14 in the solution, which is stirred by an agitator 88.
• the regenerated solution leaving the enclosure 14 can be returned by the pump 64 directly into the impregnation circuit, without passing into the tank 22.
• the automatic colorimetric analysis can be done in different ways, the currently preferred technique being spectrophotometric analysis over several wavelengths characteristic of the respective dyes and considered either sequentially or simultaneously.
• the currently preferred technique being spectrophotometric analysis over several wavelengths characteristic of the respective dyes and considered either sequentially or simultaneously.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Coloring (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Reinforced Plastic Materials (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

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Family Applications (1)

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• 1987
  • 1987-12-07 FR FR8717200A patent/FR2624142B1/fr not_active Expired - Lifetime
• 1988
  • 1988-12-05 US US07/392,975 patent/US5072472A/en not_active Expired - Lifetime
  • 1988-12-05 JP JP1500367A patent/JPH02502469A/ja active Pending
  • 1988-12-05 DE DE8989900267T patent/DE3869403D1/de not_active Expired - Lifetime
  • 1988-12-05 EP EP89900267A patent/EP0344264B1/de not_active Expired - Lifetime
  • 1988-12-05 WO PCT/FR1988/000594 patent/WO1989005370A1/fr not_active Ceased
  • 1988-12-05 AT AT89900267T patent/ATE73875T1/de active
  • 1988-12-05 BR BR888807343A patent/BR8807343A/pt unknown
  • 1988-12-05 ES ES8803706A patent/ES2009431A6/es not_active Expired

Non-Patent Citations (1)

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