EP0939161B2 - Process for dyeing of textile materials with indigo and installation for carrying out the method - Google Patents

Process for dyeing of textile materials with indigo and installation for carrying out the method Download PDF

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Publication number
EP0939161B2
EP0939161B2 EP98630005A EP98630005A EP0939161B2 EP 0939161 B2 EP0939161 B2 EP 0939161B2 EP 98630005 A EP98630005 A EP 98630005A EP 98630005 A EP98630005 A EP 98630005A EP 0939161 B2 EP0939161 B2 EP 0939161B2
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Prior art keywords
tank
tanks
oxidation
indigo
installation
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German (de)
French (fr)
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EP0939161B1 (en
EP0939161A1 (en
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François Girbaud
Marie-Thérèse Bachellerie
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Individual
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Priority to SI9830663T priority Critical patent/SI0939161T1/en
Priority to DK98630005T priority patent/DK0939161T3/en
Priority to EP98630005A priority patent/EP0939161B2/en
Priority to AT98630005T priority patent/ATE264423T1/en
Priority to DE69823161T priority patent/DE69823161T2/en
Priority to PT98630005T priority patent/PT939161E/en
Priority to ES98630005T priority patent/ES2218792T5/en
Application filed by Individual filed Critical Individual
Priority to US09/334,549 priority patent/US6123741A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/22—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using vat dyestuffs including indigo
    • D06P1/228—Indigo
    • 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
    • D06B21/00—Successive treatments of textile materials by liquids, gases or vapours
    • 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
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/12—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics in zig-zag manner over series of guiding means
    • 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
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/18—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics combined with squeezing, e.g. in padding machines
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
    • D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D06M15/277—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof containing fluorine
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M7/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made of other substances with subsequent freeing of the treated goods from the treating medium, e.g. swelling, e.g. polyolefins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/40—Reduced friction resistance, lubricant properties; Sizing compositions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/916—Natural fiber dyeing
    • Y10S8/918—Cellulose textile
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/93—Pretreatment before dyeing
    • Y10S8/931—Washing or bleaching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/932—Specific manipulative continuous dyeing

Definitions

  • the present invention relates to a process for dyeing a textile material with indigo according to the preamble of claim 1 and an installation for carrying out the method according to the preamble of claim 8.
  • an indigo-dyed textile yarn is produced, which then makes it possible to prepare a fabric called denim fabric with which articles such as blue jeans are made, for example.
  • Indigo is one of the oldest known dyes and has been used for centuries to tint textiles such as cotton.
  • the patent EP-B-0 692 042 discloses a process for dyeing a cellulose-containing textile material with indigo in which an aqueous solution of leucoindigo prepared by catalytic hydrogenation is used and converted to the pigment form by air oxidation after its rise on the textile material.
  • the U.S. Patent No. 4,283,198 discloses a continuous process for dyeing cellulosic fibers with indigo where the fibers are passed through a quenching tank train containing a liquor bath comprising leuco-indigo, sodium hydrosulfite and sodium hydroxide.
  • the US-A-3,457,022 describes a process for dyeing cotton fibers with indigo where indigo is applied at a temperature between 65 ° C and 80 ° C on the yarns and then indigo is applied at temperatures below 40 ° C .
  • the indigo tinted blue jeans have the disadvantage that they fade when washed.
  • the industry has developed processes and facilities to follow this fashion, where the fabric has been accentuated and faded by facilitating fading of the yarn. of chain.
  • the manner in which the dye was used facilitated the washing and aging. But any mode is ephemeral and lasts only one time.
  • the object of the present invention is the production of a denim fabric which is resistant to wear and discoloration by washing and with the fabric according to the present invention, there is no longer any concern for the washing waters used and the corrosive detergents employed. washing.
  • indigo is practically insoluble in water and can not be used as such for dyeing. It must be used first in a soluble form and then the dye is generated in an insoluble form in the fiber or yarn.
  • the operations usually carried out for dyeing the yarn in indigo blue are modified, by adding additional operations, both at the bath level and at the stage of oxidation and mercerization beforehand, in order to facilitate the capacity of the yarn. absorption and impregnation of the wire.
  • the yarn is then vaporized under conditions of defined temperature and pressure, before being washed and then mercerized again.
  • the second phase of the process is to form around the now dyed wire, an insulation to make it insensitive to washing, and it is then ready to be used.
  • the neutral wire must first be made by successive passages in acidic baths.
  • the yarn is then completely dried before being immersed in a bath which will definitively fix the indigo and which will give it the desired characteristics.
  • the yarn obtained by the methods known in the art consists of a white core core, i.e. untinted and externally impregnated with indigo dye.
  • the wire With the method according to the invention, the wire will be constituted by a much thinner central white core and the indigo penetrate much deeper into the outer part so that it will be tinted much deeper. Ideally the yarn will be tinted from side to side by indigo.
  • a prewashing step is first carried out by passing the wire F originating from a starting roll on which it is wound through a prewashing installation 1 constituted by two or more tanks 2 containing a prewash solution 10,15.
  • the wire is guided by rollers 3 and 4 in the first tank 2 containing the prewash solution, and then, coming out of this solution, it passes between two pressure rollers 5 to remove the excess liquid and then, guided by the roll 6, plunges back into the prewash solution.
  • the wire passes between two pressure rollers 7.
  • the guide rollers 8 and 9 the wire is immersed in the prewash solution 15 in the second tank 2.
  • the wire will move in the second tank in a path identical to that of the first tank passing successively between the two pressure rollers 12, below the guide roller 11 and between the pressure rollers 13.
  • the prewash solution contains a soaking product such as FINBIL AS (produced by Bozzetto) (trade designation) which is a phosphoric ester derivative of fatty alcohol. It is used in the aqueous solution in a concentration of 5 to 8 gr / liter. This prewash bath is used to impregnate the wire to promote the subsequent penetration of indigo.
  • a soaking product such as FINBIL AS (produced by Bozzetto) (trade designation) which is a phosphoric ester derivative of fatty alcohol. It is used in the aqueous solution in a concentration of 5 to 8 gr / liter. This prewash bath is used to impregnate the wire to promote the subsequent penetration of indigo.
  • the actual dyeing of the yarn is carried out by means of the dyeing plant 30 shown in FIG. figure 2 .
  • the dyebaths contain a reduced indigo solution containing 3 to 5% indigo powder, sodium hydrosulphite in an amount corresponding to 2/3 of the amount of indigo and caustic soda. Baumé en a quantity corresponding to twice the amount of indigo.
  • the wires pass through the baths at a speed of 20 to 60 m / minute depending on the type and quality of the wire.
  • the example shown in the figure 2 has 8 tanks but it goes without saying that the operation can be repeated 2, 3 or more times by using two, three or more sets of 8 tanks to obtain an increasing penetration of the indigo in the thread.
  • the washing and pre-wetting thereof is carried out using the installation 40 described in FIG. Fig. 3 .
  • the wire is successively passed through the tanks 41 to 45 by guiding it by means of the rollers 46, 47 and 48.
  • the tank 41 contains water and in the tanks 42, 43 and 44, acetic acid is introduced. (CH 3 -COOH) at 50% so that the tank 42 contains a proportion of 20 cc / l, the tank 43 contains 10 cc / l and the tank 44 contains 5 cc / l.
  • the tank 45 again contains water, the final pH being between 6 and 7, preferably 6.7.
  • the wire is pre-wiped by passing it around the rollers 50 as can be seen in FIG. figure 3 .
  • the indigo dye is sized on the yarn to increase the resistance to washing and rubbing of the fabrics that will be subsequently prepared by passing the yarn through the installation. sizing 60 described in the figure 4 .
  • the wire passes into a tank 62 containing a mixture of resins 63 and is guided through the tank by means of the guide rollers 64 and the pressure rollers 61.
  • the wire is dried using the installation 70 shown in FIG. figure 5 passing the yarns around the rollers 71. This drying is done at a temperature between 150-180 ° C.
  • the method according to the invention can be implemented with various types of son, for example cotton, cotton and nylon, cotton and polyester etc ....

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Coloring (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Dyeing of textile fibers with indigo comprises impregnation of the fabric with indigo in reduced form, in eight successive baths with intermediate air exposure to oxidize the indigo, and fixing the resulting dye by forming a transparent resin film on the fibers. Process for dyeing textile materials with indigo comprises: (A) prewashing a textile fabric web (F) by passage through a prewashing unit (1) comprising two or more baths (2) containing a prewashing solution; (B) subsequently dyeing the fabric by passage through a dyeing installation (30) comprising a series of eight baths (35) each containing a solution of indigo in reduced form, and during passage of the web from one bath to the next, subjecting the web to oxidation by exposure to the air to convert the reduced indigo to indigo which then colors the fabric by impregnation of the fibers, the air oxidation being conducted such that if the level of oxidation occurring upon passage between the first bath and the second = x, then the level of oxidation which occurs upon successive passage through the remaining dye baths is as follows: (i) between the 1st. and 2nd. baths, level of oxidation = x; (ii) between the 2nd. and 3rd. baths, level of oxidation = 2x; (iii) between the 3rd. and 4th. baths, level of oxidation = 3x; (iv) between the 4th. and 5th. baths, level of oxidation = 4x; (v) between the 5th. and 6th. baths, level of oxidation = 5x; (vi) between the 6th. and 7th. baths, level of oxidation = 6x; (vii) between the 7th. and 8th. baths, level of oxidation = 7x; and (viii) after the 8th. bath, the level of oxidation = 8x; (C) washing and pre-drying the web by passage through a washing and pre-drying unit (40) comprising a series of baths (41, 42, 43, 44, 45) of which the first bath (41) contains water, the baths (42, 43 and 44) contain acetic acid and the bath (45) contains water such that the pH in bath (45) is 6-7, and after bath (45) the web is pre-dried by passage through rollers (50); (D) fixing the indigo dye onto the fabric web by passage through sizing unit comprising a bath (62) containing a mixture of resins to form a transparent film on the fibers in the web; (E) drying the web by passage over drying rolls (70) and (F) recovering the dyed fabric by winding onto a drum. Independent claims are included covering the installation for carrying out the dyeing procedure.

Description

La présente invention concerne un procédé de teinture d'une matière textile avec de l'indigo selon le préambule de la revendication 1 et une installation pour la mise en oeuvre du procédé selon le préambule de la revendication 8.The present invention relates to a process for dyeing a textile material with indigo according to the preamble of claim 1 and an installation for carrying out the method according to the preamble of claim 8.

Par ce procédé on fabrique un fil textile teinté à l'indigo permettant ensuite de préparer un tissu appelé tissu denim avec lequel on réalise des articles tels que le blue jean, par exemple.By this method, an indigo-dyed textile yarn is produced, which then makes it possible to prepare a fabric called denim fabric with which articles such as blue jeans are made, for example.

L'indigo est un des colorants les plus anciens connus et est utilisé depuis des siècles pour teinter les textiles tels que le coton.Indigo is one of the oldest known dyes and has been used for centuries to tint textiles such as cotton.

Le brevet EP-B-0 692 042 décrit un procédé de teinture d'une matière textile contenant de la cellulose avec de l'indigo au cours duquel on utilise une solution aqueuse de leuco-indigo préparée par hydrogénation catalytique et on convertit ce dernier en la forme pigmentaire par oxydation à l'air après sa montée sur la matière textile.The patent EP-B-0 692 042 discloses a process for dyeing a cellulose-containing textile material with indigo in which an aqueous solution of leucoindigo prepared by catalytic hydrogenation is used and converted to the pigment form by air oxidation after its rise on the textile material.

Le brevet US-A-4 283 198 décrit un procédé continu de teinture de fibres cellulosiques avec de l'indigo où on fait passer les fibres au travers d'un train de cuves de trempage contenant un bain de liqueur comprenant du leuco-indigo, de l'hydrosulfite de sodium et de l'hydroxyde de sodium.The U.S. Patent No. 4,283,198 discloses a continuous process for dyeing cellulosic fibers with indigo where the fibers are passed through a quenching tank train containing a liquor bath comprising leuco-indigo, sodium hydrosulfite and sodium hydroxide.

Le brevet US-A-3 457 022 décrit un procédé de teinture de fibres de coton avec de l'indigo où on applique l'indigo à une température entre 65°C et 80°C sur les fils et ensuite on applique de l'indigo à des températures inférieures à 40°C.The US-A-3,457,022 describes a process for dyeing cotton fibers with indigo where indigo is applied at a temperature between 65 ° C and 80 ° C on the yarns and then indigo is applied at temperatures below 40 ° C .

Le blue-jean teinté à l'indigo présente le désavantage qu'il se décolore au lavage. Durant ces dernières années il a même existé une mode qui consistait à porter des blue-jeans décolorés et l'industrie a développé des procédés et des installations pour suivre cette mode, où on accentuait et favorisait la décoloration du tissu en facilitant la décoloration du fil de chaîne. La manière de mettre en oeuvre la teinture facilitait le délavage et le vieillissement. Mais toute mode est éphémère et ne dure qu'un temps.The indigo tinted blue jeans have the disadvantage that they fade when washed. In recent years there has even been a trend of wearing faded blue jeans, and the industry has developed processes and facilities to follow this fashion, where the fabric has been accentuated and faded by facilitating fading of the yarn. of chain. The manner in which the dye was used facilitated the washing and aging. But any mode is ephemeral and lasts only one time.

Le but de la présente invention est la réalisation d'un tissu denim qui résiste à l'usure et à la décoloration par lavage et avec le tissu selon la présente invention on ne se préoccupe plus des eaux de lavage utilisées ainsi que des détergents corrosifs employés au lavage.The object of the present invention is the production of a denim fabric which is resistant to wear and discoloration by washing and with the fabric according to the present invention, there is no longer any concern for the washing waters used and the corrosive detergents employed. washing.

Le procédé de teinture d'une matière textile selon l'invention est défini dans la partie caractérisante de revendication 1.The process for dyeing a textile material according to the invention is defined in the characterizing part of claim 1.

L'installation pour la mise en oeuvre du procédé de teinture selon l'invention est définie dans la partie caractérisante de la revendication 8.The installation for carrying out the dyeing process according to the invention is defined in the characterizing part of claim 8.

Il est connu que l'indigo est pratiquement insoluble dans l'eau et il ne peut donc être utilisé tel quel pour la teinture. Il doit être utilisé d'abord sous une forme soluble et ensuite on génère le colorant sous une forme insoluble dans la fibre ou le fil.It is known that indigo is practically insoluble in water and can not be used as such for dyeing. It must be used first in a soluble form and then the dye is generated in an insoluble form in the fiber or yarn.

Pour fixer l'indigo on oxyde le leuco-indigo selon la réaction:

Figure imgb0001
To fix the indigo the leucoindigo is oxidized according to the reaction:
Figure imgb0001

Par le procédé selon l'invention, on modifie les opérations habituellement effectuées pour teindre le fil en bleu indigo, en ajoutant des opérations supplémentaires, tant au niveau des bains qu'au stade de l'oxydation et du mercerisage préalable pour faciliter la capacité d'absorption et d'imprégnation du fil.By the process according to the invention, the operations usually carried out for dyeing the yarn in indigo blue are modified, by adding additional operations, both at the bath level and at the stage of oxidation and mercerization beforehand, in order to facilitate the capacity of the yarn. absorption and impregnation of the wire.

Au cours du processus d'oxydation, on commence par des expositions très rapides à l'air au début du processus dans les premiers bains de teinture et ensuite après chaque bain on augmente progressivement la durée d'exposition de manière à favoriser la pénétration de l'indigo dans le fil.During the oxidation process, very rapid exposure to air is initiated at the beginning of the process in the first dyeing baths and then after each bath the duration of exposure is gradually increased so as to favor the penetration of the water. indigo in the wire.

Le fil est ensuite vaporisé à des conditions de température et de pression définies, avant d'être lavé puis mercerisé de nouveau.The yarn is then vaporized under conditions of defined temperature and pressure, before being washed and then mercerized again.

La deuxième phase du procédé consiste à constituer autour du fil maintenant teint, une isolation pour le rendre insensible au lavage, et il est alors prêt à être utilisé. Pour ce faire il faut d'abord rendre le fil neutre par des passages successifs dans des bains acides.The second phase of the process is to form around the now dyed wire, an insulation to make it insensitive to washing, and it is then ready to be used. To do this, the neutral wire must first be made by successive passages in acidic baths.

Le fil est ensuite complètement séché avant d'être immergé dans un bain qui fixera définitivement l'indigo et qui lui donnera les caractéristiques souhaitées. Le fil obtenu par les procédés connus dans la technique est constitué par une âme centrale blanche, c.-à-d. non teintée et par une partie externe imprégnée par la teinture d'indigo. Grâce au procédé selon l'invention, le fil sera constitué par une âme centrale blanche beaucoup plus mince et l'indigo pénétrera beaucoup plus profondément dans la partie externe de sorte que celle-ci sera teintée beaucoup plus en profondeur. Idéalement le fil sera teinté de part en part par l'indigo.The yarn is then completely dried before being immersed in a bath which will definitively fix the indigo and which will give it the desired characteristics. The yarn obtained by the methods known in the art consists of a white core core, i.e. untinted and externally impregnated with indigo dye. With the method according to the invention, the wire will be constituted by a much thinner central white core and the indigo penetrate much deeper into the outer part so that it will be tinted much deeper. Ideally the yarn will be tinted from side to side by indigo.

Pour que l'invention soit mieux comprise, référence est faite aux figures accompagnantes dans lesquelles:

  • la fig. 1 représente une vue schématique de l'installation de prélavage utilisée au cours du procédé selon l'invention.
  • la fig. 2 représente une vue schématique de l'installation de teinture à l'indigo utilisée au cours du procédé selon l'invention.
  • la fig. 3 représente une vue schématique de l'installation de lavage et de préessuyage utilisée au cours du procédé selon l'invention.
  • la fig. 4 représente une vue schématique de l'installation d'encollage utilisée au cours du procédé selon l'invention.
  • la fig. 5 représente une vue schématique de l'installation de séchage et de formation du fil de chaîne selon l'invention.
For the invention to be better understood, reference is made to the accompanying figures in which:
  • the Fig. 1 represents a schematic view of the prewash plant used during the process according to the invention.
  • the Fig. 2 represents a schematic view of the indigo dyeing plant used during the process according to the invention.
  • the Fig. 3 represents a schematic view of the washing and pre-wetting installation used during the process according to the invention.
  • the Fig. 4 represents a schematic view of the sizing installation used during the process according to the invention.
  • the Fig. 5 is a schematic view of the drying installation and forming the warp according to the invention.

En se référant successivement aux figs. 1 à 5 le procédé selon l'invention sera maintenant décrit. Selon ce procédé on met d'abord en oeuvre une étape de prélavage en faisant passer le fil F provenant d'un rouleau de départ sur lequel il est enroulé au travers d'une installation de prélavage 1 constituée par deux ou plusieurs cuves 2 contenant une solution de prélavage 10,15. Le fil est guidé par des rouleaux 3 et 4 dans la première cuve 2 contenant la solution de prélavage puis en sortant de cette solution il passe entre deux rouleaux presseurs 5 pour enlever l'excès de liquide puis, guidé par le rouleau 6, replonge dans la solution de prélavage. A la sortie de ce bain, le fil passe entre deux rouleaux presseurs 7. Ensuite, guidé par les rouleaux de guidage 8 et 9, le fil plonge dans la solution de prélavage 15 se trouvant dans la deuxième cuve 2. Le fil se déplacera dans la deuxième cuve selon un parcours identique à celui de la première cuve en passant successivement entre les deux rouleaux presseurs 12, en-dessous du rouleau de guidage 11 puis entre les rouleaux presseurs 13.Referring successively to Figs. 1 to 5 the method according to the invention will now be described. According to this method, a prewashing step is first carried out by passing the wire F originating from a starting roll on which it is wound through a prewashing installation 1 constituted by two or more tanks 2 containing a prewash solution 10,15. The wire is guided by rollers 3 and 4 in the first tank 2 containing the prewash solution, and then, coming out of this solution, it passes between two pressure rollers 5 to remove the excess liquid and then, guided by the roll 6, plunges back into the prewash solution. At the exit of this bath, the wire passes between two pressure rollers 7. Then, guided by the guide rollers 8 and 9, the wire is immersed in the prewash solution 15 in the second tank 2. The wire will move in the second tank in a path identical to that of the first tank passing successively between the two pressure rollers 12, below the guide roller 11 and between the pressure rollers 13.

La solution de prélavage contient un produit imbibant tel que le FINBIL AS (produit par la société Bozzetto) (désignation commerciale) qui est un dérivé d'ester phosphorique d'alcool gras. Il est utilisé dans la solution aqueuse en une concentration de 5 à 8 gr/litre. Ce bain de prélavage est utilisé pour imprégner le fil afin de favoriser la pénétration ultérieure de l'indigo.The prewash solution contains a soaking product such as FINBIL AS (produced by Bozzetto) (trade designation) which is a phosphoric ester derivative of fatty alcohol. It is used in the aqueous solution in a concentration of 5 to 8 gr / liter. This prewash bath is used to impregnate the wire to promote the subsequent penetration of indigo.

Après cette étape de prélavage on passe à la teinture proprement dite du fil au moyen de l'installation de teinture 30 représentée dans la figure 2.After this prewashing step, the actual dyeing of the yarn is carried out by means of the dyeing plant 30 shown in FIG. figure 2 .

L'installation de teinture 30 est constituée par une série de 8 cuves 35 contenant une solution d'indigo réduit. Le fil F provenant de l'installation de prélavage est guidé par le rouleau de guidage 31 dans la solution de teinture se trouvant dans la première cuve 35, tourne autour du rouleau 32 et sort du bain pour passer entre les premiers rouleaux presseurs 34 de la première cuve 35, passe autour rouleau 33 et retourne dans le solution de teinture de la première cuve, passe autour du deuxième rouleau 32 de la première cuve pour ensuite sortir du bain, passe entre le deuxième jeu de rouleaux presseurs 34 de la première cuve. Ensuite le fil passe autour du rouleau 36. Sur le trajet entre le deuxième jeu de rouleaux presseurs 34 et le rouleau 36, le fil imprégné est oxydé et il se forme de l'indigo qui teinte le fil. Après avoir tourné autour du rouleau 36, le fil passera dans la solution de teinture de la deuxième cuve où il subit le même parcours que dans la première cuve aux moyens des rouleaux 31, 32 et 34 de cette deuxième cuve. A la sortie de la deuxième cuve le fil tournera non plus autour d'un rouleau 36, comme à la sortie de la première cuve, mais autour de deux rouleaux 36 et deux rouleaux 37 de sorte que le parcours à l'air, à la sortie de la deuxième cuve sera deux fois plus long qu'à la sortie de la première cuve et l'oxydation sera donc deux fois plus importante. Après avoir tourné autour des deux rouleaux 36 et 37 le fil pénétrera dans la troisième cuve et ainsi de suite jusqu'à la huitième cuve et à la sortie de chaque cuve le fil tournera autour de rouleaux 36. Il convient de remarquer comme il est montré dans la fig. 2 que entre la troisième et la quatrième cuve, il y a trois rouleaux 36, entre la quatrième et la cinquième cuve il y a quatre rouleaux 36 et ainsi de suite jusqu'à la sortie de la huitième cuve où il y aura 8 rouleaux 36. Il en résulte que le temps d'exposition à l'air est augmenté progressivement en passant de la première cuve à la huitième, de telle sorte que si on donne la valeur x à l'oxydation entre la première cuve et la deuxième, on aura successivement:

  • Entre les 1° et 2° cuves la valeur d'oxydation = x
  • Entre les 2° et 3° cuves la valeur d'oxydation = 2x
  • Entre les 3° et 4° cuves la valeur d'oxydation = 3x
  • Entre les 4° et 5° cuves la valeur d'oxydation = 4x
  • Entre les 5° et 6° cuves la valeur d'oxydation = 5x
  • Entre les 6° et 7° cuves la valeur d'oxydation = 6x
  • Entre les 7° et 8° cuves la valeur d'oxydation = 7x
  • Après la 8° cuve valeur d'oxydation = 8x
The dyeing plant 30 consists of a series of 8 tanks containing a reduced indigo solution. The wire F coming from the prewashing plant is guided by the guide roller 31 in the dyeing solution in the first tank 35, rotates around the roll 32 and leaves the bath to pass between the first pressure rollers 34 of the first tank 35, passes around roller 33 and returns to the dyeing solution of the first tank, passes around the second roller 32 of the first tank and then out of the bath, passes between the second set of pressure rollers 34 of the first tank. Then the thread passes around the roll 36. On the path between the second set of pressure rollers 34 and the roll 36, the impregnated thread is oxidized and indigo is formed which dyes the thread. After turning around the roller 36, the wire will pass into the dyeing solution of the second tank where it undergoes the same path as in the first tank by means of the rollers 31, 32 and 34 of the second tank. At the outlet of the second tank, the wire will no longer turn around a roller 36, as at the outlet of the first tank, but around two rollers 36 and two rollers 37 so that the air route, at the output of the second tank will be twice as long as the output of the first tank and oxidation will be twice as large. After turning around the two rollers 36 and 37 the wire will enter the third tank and so on until the eighth tank and at the outlet of each tank the wire will spin around rollers 36. It should be noted as shown in the Fig. 2 that between the third and the fourth tank, there are three rollers 36, between the fourth and the fifth tank there are four rollers 36 and so on until the outlet of the eighth tank where there will be 8 rollers 36. As a result, the time of exposure to air is increased progressively from the first tank to the eighth, so that if we give the value x to the oxidation between the first tank and the second, we will have successively:
  • Between 1 ° and 2 ° tanks the oxidation value = x
  • Between the 2 ° and 3 ° tanks the oxidation value = 2x
  • Between the 3 ° and 4 ° tanks the oxidation value = 3x
  • Between the 4 ° and 5 ° tanks the oxidation value = 4x
  • Between the 5 ° and 6 ° tanks the oxidation value = 5x
  • Between the 6 ° and 7 ° tanks the oxidation value = 6x
  • Between the 7 ° and 8 ° tanks the oxidation value = 7x
  • After 8 ° tank oxidation value = 8x

Les bains de teinture contiennent une solution d'indigo réduit contenant 3 à 5% d'indigo en poudre, de l'hydrosulfite de sodium en une quantité correspondant aux 2/3 de la quantité d'indigo et de la soude caustique 36 Baumé en une quantité correspondant au double de la quantité d'indigo.The dyebaths contain a reduced indigo solution containing 3 to 5% indigo powder, sodium hydrosulphite in an amount corresponding to 2/3 of the amount of indigo and caustic soda. Baumé en a quantity corresponding to twice the amount of indigo.

Les fils passent au travers des bains à une vitesse de 20 à 60 m/minute selon le type et la qualité du fil.The wires pass through the baths at a speed of 20 to 60 m / minute depending on the type and quality of the wire.

L'exemple représenté dans la figure 2 comporte 8 cuves mais il va de soi que l'opération peut être répétée 2, 3 ou davantage de fois en utilisant deux, trois ou davantage de jeux de 8 cuves pour ainsi obtenir une pénétration de plus en plus importante de l'indigo dans le fil.The example shown in the figure 2 has 8 tanks but it goes without saying that the operation can be repeated 2, 3 or more times by using two, three or more sets of 8 tanks to obtain an increasing penetration of the indigo in the thread.

Grâce à ce procédé de teinture on obtient une coloration indigo intense et foncée du fil.Thanks to this dyeing process, an intense and dark indigo coloration of the wire is obtained.

Lorsque le fil a été teint, on procède au lavage et au préessuyage de celui-ci au moyen de l'installation 40 décrite dans la fig. 3. On fait passer le fil successivement dans les cuves 41 à 45 en le guidant au moyen des rouleaux 46, 47 et 48. La cuve 41 contient de l'eau et dans les cuves 42, 43 et 44, on introduit de l'acide acétique (CH3-COOH) à 50% de telle façon que la cuve 42 contienne une proportion de 20 cc/l, la cuve 43 contienne 10 cc/l et la cuve 44 contienne 5 cc/l. La cuve 45 contient de nouveau de l'eau, le pH final étant entre 6 et 7 de préférence 6,7.When the yarn has been dyed, the washing and pre-wetting thereof is carried out using the installation 40 described in FIG. Fig. 3 . The wire is successively passed through the tanks 41 to 45 by guiding it by means of the rollers 46, 47 and 48. The tank 41 contains water and in the tanks 42, 43 and 44, acetic acid is introduced. (CH 3 -COOH) at 50% so that the tank 42 contains a proportion of 20 cc / l, the tank 43 contains 10 cc / l and the tank 44 contains 5 cc / l. The tank 45 again contains water, the final pH being between 6 and 7, preferably 6.7.

A la sortie de la cuve 45, on procède au préessuyage du fil en le faisant passer autour des rouleaux 50 comme on peut le voir dans la figure 3.At the outlet of the tank 45, the wire is pre-wiped by passing it around the rollers 50 as can be seen in FIG. figure 3 .

Après le lavage et le préssuyage du fil on procède à l'encollage de la teinture d'indigo sur le fil pour augmenter la résistance au lavage et au frottement des tissus qui seront ultérieurement préparés, en faisant passer le fil au travers de l'installation d'encollage 60 décrite dans la figure 4. Le fil passe dans une cuve 62 contenant un mélange de résines 63 et est guidé au travers de la cuve au moyen des rouleaux de guidage 64 et des rouleaux presseurs 61.After washing and preweaving the yarn, the indigo dye is sized on the yarn to increase the resistance to washing and rubbing of the fabrics that will be subsequently prepared by passing the yarn through the installation. sizing 60 described in the figure 4 . The wire passes into a tank 62 containing a mixture of resins 63 and is guided through the tank by means of the guide rollers 64 and the pressure rollers 61.

La composition du mélange de résines est comme suit:

  • 10 à 50 g/l de sels quaternaires de polyalkylamine
  • 10 à 50 g/l de résine fluorocarbonique
  • 10 à 200 g/l de résine acrylique
  • 1 à 20 g/l de polysiloxane autocatalysé
  • 10 à 200 g/l de résine polyurétanique
The composition of the resin mixture is as follows:
  • 10 to 50 g / l of polyalkylamine quaternary salts
  • 10 to 50 g / l of fluorocarbon resin
  • 10 to 200 g / l of acrylic resin
  • 1 to 20 g / l of autocatalyzed polysiloxane
  • 10 to 200 g / l of polyurethane resin

Au cours de cet encollage il se forme un film transparent sur les fibres du fil qui fixe l'indigo sur le fil et augmente ainsi sa résistance au lavage.During this sizing, a transparent film is formed on the fibers of the yarn which fixes the indigo on the yarn and thus increases its resistance to washing.

Après cette étape d'encollage on procède au séchage du fil au moyen de l'installation 70 représentée dans la figure 5 en faisant passer, les fils autour des rouleaux 71. Ce séchage se fait à une température entre 150-180°C.After this sizing step, the wire is dried using the installation 70 shown in FIG. figure 5 passing the yarns around the rollers 71. This drying is done at a temperature between 150-180 ° C.

Par la suite le fil de chaîne est enroulé autour du rouleau 72.Thereafter the warp is wrapped around the roller 72.

Le procédé selon l'invention peut être mis en oeuvre avec divers types de fils, par exemple du coton, du coton et de nylon, de coton et de polyester etc... .The method according to the invention can be implemented with various types of son, for example cotton, cotton and nylon, cotton and polyester etc ....

Le procédé et l'installation pour la mise en oeuvre du procédé sont des modes de réalisation préférés et il doit être compris que des modifications peuvent être faites et il est entendu que ces modifications sont également couvertes dans les limites des revendications suivantes.The method and the installation for carrying out the method are preferred embodiments and it should be understood that modifications can be made and it is understood that these modifications are also covered within the scope of the following claims.

Claims (16)

  1. A process for dyeing a textile material with indigo, characterised in that it comprises the following steps:
    a. prewashing a thread F by passing it through a prewash installation (1) formed by two or more tanks (2) containing a prewash solution (10, 15);
    b. then dyeing the thread by passing it through a dyeing installation (30);
    c. washing and predrying the thread by passing it through a washing and predrying installation (40) comprising a series of tanks (41, 42, 43, 44 and 45), the first tank (41) containing water, the tanks (42, 43 and 44) containing acetic acid and the tank (45) containing water, such that the pH-value in the last tank will be between 6 and 7 and at the exit from the tank (45) the thread is predried by passing it between the rollers (50);
    d. sizing the indigo dye on the thread by passing it through a sizing installation (60) comprising a tank (62) containing a mixture of resins to form a transparent film on the fibres of the thread;
    e. drying the thread by passing it through a drying installation (70) formed by rollers (71); and
    f. collecting the warp thread by rolling it on the drum (72),
    characterised in that step b) of dyeing the thread is carried out by passing it through a dyeing installation (30) formed by a series of eight tanks (35) each containing a solution of reduced indigo and, when passing from one tank (35) to another, the thread experiences oxidation by exposure to the air transforming the reduced indigo into indigo which then dyes the thread by impregnation, oxidation by exposure to the air being implemented in such a way that, on passing successively from the first tank (35) to the eighth, if the value x is given to oxidation between the first tank (35) and the second tank, the results will be in succession:
    between the 1st and 2nd tanks the oxidation value = x
    between the 2nd and 3rd tanks the oxidation value = 2x
    between the 3rd and 4th tanks the oxidation value = 3x
    between the 4th and 5th tanks the oxidation value = 4x
    between the 5th and 6th tanks the oxidation value = 5x
    between the 6th and 7th tanks the oxidation value = 6x
    between the 7th and 8th tanks the oxidation value = 7x
    after the 8th tank the oxidation value = 8x.
  2. A process according to claim 1 characterised by using in the course of step a) a prewash solution containing a derivative of fatty alcohol phosphoric ester such as FINBIL AS.
  3. A process according to claim 1 characterised in that the dyeing bath in the tanks (35) comprises a solution of reduced indigo containing 3 to 5% of indigo in powder form, sodium hydrosulphite in an amount corresponding to two-thirds of the amount of indigo and 36 Baumé caustic soda in an amount corresponding to double the amount of indigo.
  4. A process according to claim 1 characterised in that in step c) the solution of acetic acid in the tank (42) is obtained by adding 50% acetic acid to the tank (42) in an amount of 20 cc/l, the solution of acetic acid in the tank (43) is obtained by adding 50% acetic acid to the tank (43) in an amount of 10 cc/l and the solution of acetic acid in the tank (44) is obtained by adding 50% acetic acid to the tank (44) in an amount of 5 cc/l.
  5. A process according to claim 1 characterised in that the mixture of resins in the course of step d) comprises a mixture of:
    10 to 50 g/l of quaternary polyalkylamine salts,
    10 to 50 g/l of fluorocarbon resin,
    10 to 200 g/l of acrylic resin,
    1 to 20 g/l of autocatalysed polysiloxane, and
    10 to 200 g/l of polyurethane resin.
  6. A process according to claim 1 characterised in that step b) can be repeated several times using 16 or 24 dyeing tanks (35) instead of eight.
  7. A process according to claim 1 characterised in that the threads pass through the dyeing baths at a speed of 20 to 60 m/minute.
  8. An installation for carrying out the dyeing process according to claims 1 to 5 characterised in that it comprises:
    a) a prewash installation (1);
    b) a dyeing installation (30);
    c) a washing and predrying installation (40);
    d) a sizing installation (60); and
    e) a drying installation (70);
    characterised in that said dyeing installation (30) comprises a series of eight tanks (35) containing a bath of reduced indigo, a series of rollers (31, 32, 33, 34, 36 and 37) associated with each tank, the rollers (36) being disposed between each tank (35) in such a way that there is one roller (36) between the first and second tanks (35), two rollers (36) between the second and third tanks, three rollers (36) between the third and fourth tanks (35) and so forth to the eighth tank (35) and after same there are also eight rollers (36), that arrangement of rollers (36) thus making it possible to progressively increase the period for which the thread is exposed to the open air to thus cause oxidation of the thread in such a way that if the value x is given to oxidation between the first tank (35) and the second tank, the results will be in succession:
    between the 1st and 2nd tanks the oxidation value = x
    between the 2nd and 3rd tanks the oxidation value = 2x
    between the 3rd and 4th tanks the oxidation value = 3x
    between the 4th and 5th tanks the oxidation value = 4x
    between the 5th and 6th tanks the oxidation value = 5x
    between the 6th and 7th tanks the oxidation value = 6x
    between the 7th and 8th tanks the oxidation value = 7x
    after the 8th tank the oxidation value = 8x.
  9. An installation according to claim 8 characterised in that the prewash installation comprises:
    two or more tanks (2) containing a prewash solution (10, 15), a guide roller (3) for passing the thread into the prewash solution (10), a guide roller (4) for directing the thread between two pressing rollers (5) which guide the thread towards a guide roller (6), two pressing rollers (7) for removing the excess of liquid, a guide roller (8) directing the thread into the washing liquid (15) in the second tank (2), a guide roller (9) directing the thread towards two pressing rollers (12), a guide roller (11) passing the thread into the prewash solution (15) again, and two pressing rollers (13) for drying the thread as it leaves the second tank (2).
  10. An installation according to claim 8 characterised in that the washing and predrying installation (40) comprises a series of tanks (41, 42, 43, 44 and 45), and rollers (46, 47 and 48) associated with each tank, the first tank (41) containing water, the tanks (42, 43 and 44) containing acetic acid and the tank (45) containing water, such that the pH-value in the last tank will be between 6 and 7 and at the exit from the tank (45) there is a series of rollers (50) for drying the thread.
  11. An installation according to claim 8 characterised in that the sizing installation (60) comprises a tank containing a mixture of resins.
  12. An installation according to claim 8 characterised by using in the course of step a) a prewash solution containing a derivative of fatty alcohol phosphoric ester such as FINBIL AS.
  13. An installation according to claim 8 characterised in that the dyeing bath in the tanks (35) comprises a solution of reduced indigo containing 3 to 5% of reduced indigo in powder form, sodium hydrosulphite in an amount corresponding to two-thirds of the amount of indigo and 36 Baumé caustic soda in an amount corresponding to double the amount of indigo.
  14. An installation according to claim 8 characterised in that in step c) the solution of acetic acid in the tank (42) is obtained by adding 50% acetic acid to the tank (42) in an amount of 20 cc/l, the solution of acetic acid in the tank (43) is obtained by adding 50% acetic acid to the tank (43) in an amount of 10 cc/l and the solution of acetic acid in the tank (44) is obtained by adding 50% acetic acid to the tank (44) in an amount of 5 cc/l.
  15. An installation according to claim 8 characterised in that the mixture of resins in the course of step d) comprises a mixture of:
    10 to 50 g/l of quaternary polyalkylamine salts,
    10 to 50 g/l of fluorocarbon resin,
    10 to 200 g/l of acrylic resin,
    1 to 20 g/l of autocatalysed polysiloxane, and
    10 to 200 g/l of polyurethane resin.
  16. An installation according to claim 8 characterised in that step b) can be repeated several times using 16 or 24 dyeing tanks (35) instead of eight.
EP98630005A 1998-02-26 1998-02-26 Process for dyeing of textile materials with indigo and installation for carrying out the method Expired - Lifetime EP0939161B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES98630005T ES2218792T5 (en) 1998-02-26 1998-02-26 DYING PROCEDURE OF A TEXTILE MATTER WITH INDIGO, AND INSTALLATION FOR THE APPLICATION OF THE PROCEDURE.
EP98630005A EP0939161B2 (en) 1998-02-26 1998-02-26 Process for dyeing of textile materials with indigo and installation for carrying out the method
AT98630005T ATE264423T1 (en) 1998-02-26 1998-02-26 DYEING PROCESS FOR TEXTILE MATERIALS USING INDIGO AND DEVICE FOR CARRYING OUT THE DYEING PROCESS
DE69823161T DE69823161T2 (en) 1998-02-26 1998-02-26 Dyeing process for textile materials with indigo and device for carrying out the dyeing process
PT98630005T PT939161E (en) 1998-02-26 1998-02-26 DYEING PROCESS OF A TEXTILE MATERIAL WITH ANIL AND INSTALLATION TO CARRY OUT THE PROCESS
DK98630005T DK0939161T3 (en) 1998-02-26 1998-02-26 Method for dyeing textile fabrics with indigo and device for carrying out the process
SI9830663T SI0939161T1 (en) 1998-02-26 1998-02-26 Process for dyeing of textile materials with indigo and installation for carrying out the method
US09/334,549 US6123741A (en) 1998-02-26 1999-06-16 Process for dyeing a textile material with indigo and arrangement for conducting the process

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US6123741A (en) 2000-09-26
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