Classifications

• • 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
  • D06P1/44—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 insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/673—Inorganic compounds
• • 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
  • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
• • 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
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
  • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
  • D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
  • D06M11/61—Liquid ammonia
• • 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
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/22—Effecting variation of dye affinity on textile material by chemical means that react with the fibre
• • 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
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/02—Natural fibres, other than mineral fibres
  • D06M2101/04—Vegetal fibres
  • D06M2101/06—Vegetal fibres cellulosic

Definitions

• Dyeing is effected with the materials, which can be in any form, impregnated with liquid ammonia re- [30] Fm'e'gn Apphcamn Pnomy Data sulting from a treatment for improving the properties May 18, I972 France 72.17912 of the cellulosic materials,
• the dye-affinity of the materials treated by such a process is generally particu- [52] ⁇ 1.8. C] 8/82; 8/34 lafly good and uperior to that of imilar materials [51] Int. Cl D06p 3/60 which have been treated with liquid ammonia but [58] Fleld of Search 8/82, 34, 54.2 fr which the residual ammonia has beenremoved,
• treatment with liquid ammonia improves the dye-affinity of cellulosicfibres, and dyeing according to classical methods is more efficacious if it is effected on a product which has previously been treated with liquid ammonia.
• This dye-treatment is effected after the liquid ammonia treatment, all the residual ammonia having previously been removed from the product.
• a process for dyeing a cellulosic material which process comprises subjecting the material to the action of liquid ammonia to impregnate the material, and effecting dyeing of the liquid ammonia impregnated material.
• dyeing is effected without the simultaneous use of liquid ammonia and the residual ammonia introduced during a treatment with liquid ammonia is eliminated during the dyeing.
• the dye-affinity of the material for the coloring agent is noticeably improved using a process in accordance with the invention, as a result of its being impregnated with liquid ammonia, compared with that of materials after elimination of the residual ammonia.
• Dyeing of cellulosic products by a process in accordance with the invention is effected after'the product has been subjected to the action of liquid ammonia.
• the process of dyeing is, however, effected on a product which is still impregnated with liquid ammonia.
• the material is wrung before dyeing to pro- DESCRIPTION OF THE PREFERRED EMBODIMENTS
• the initial treatment of a cellulosic material for example a woven cotton cloth, with liquid ammonia can be effected according to a hitherto proposed method.
• One of the most simple methods is to pass the material through a bath of liquid ammonia maintained at a temperature below 35C at atmospheric pressure.
• the product After leaving the bath, the product, still impregnated with liquid ammonia, is preferably immediately treated with dye, for example by being plunged into abath of a coloring agent.
• dye for example by being plunged into abath of a coloring agent.
• the removal of excess coloring agent, as well as the fixing of the latter on the cellulosic material, can then be effected by known methods.
• the use of a process in accordance with the present invention generally serves to improve wetting of cellulosic fibres, and, as a result, their affinity for coloring agents. Penetration to the core of the fibers by the coloring agent can thereby be much more complete and be particularly fast.
• the coloring of a cellulosic material dyed under these conditions is generally more intense than that of a material dyed after the action of liquid ammonia and the complete elimination of the residual ammonia.
• a residual ammonia content of about 30% by weight of the product is sufficient to obtain a satisfactory coloring action. It is often preferred to wring the product between the treatment with liquid ammonia and the abovementioned dyeing in order to recover a part of the ammonia which can be directly recycled. By wringing, the excess ammonia mechanically retained by the product is removed. However, the chemically bound ammonia is not removed.
• the temperature of the dye bath will evidently be varied according to the coloring agent used but it will generally be above that of the liquid ammonia.
• a fiber impregnated with ammonia when plunged into such a bath of coloring agent is subjected to a sharp rise in temperature which results in a part of the ammonia retained by the material vaporising. This ammonia is released in the gaseous state and it provides an important agitation of the bath in contact with the fiber.
• the molecules of the coloring agent likely to be absorbed by the material are then constantly renewed at the surface of the material.
• a chemical reaction also occurs, bonds between the cellulose and the ammonia being broken. This produces reactive sites on the resulting celloglucane, these sites being capable of fixing of a molecule of coloring agent.
• Processes in accordance with the present invention can have numerous advantages. They generally do not require modification of conditions of the liquid ammonia treatment. This enables treatment apparatus already installed to be readily used. Wringing enables an important part of the entrained ammonia to be recovered and recycled, without problems of purification and pollution. The separate step of complete elimination of the residual ammonia is also avoided. This represents an economy and it provides an appreciable gain in time. It also avoids the use of washing with water, which necessitated a subsequent purification step in the hitherto proposed processes.
• the carrying out of the dyeing can be much easier and effective than hitherto since it can be effected very rapidly, and important gains in raw materials and time can be achieved in obtaining an improved product. Further, it is possible to use a wide range of coloring agents, since the two steps of liquid ammonia treatment and dyeing are effected successively. Such a process can be of particular interest in continuously treating cellulosic materials, such as filaments or weaves, since the number of stages is reduced and the speed of treatment can be noticeably increased.
• Sample A dyeing without pre-treatment
• Sample B pre-treatment in liquid ammonia, evaporation of the ammonia in a current of hot air, and
• Sample C pre-treatment with liquid ammonia, wringing until about 40% by weight of residual ammonia, and dyeing;
• Sample D pre-treatment with liquid ammonia, then dyeing without removal of any of the ammonia.
• Solane Blue R (powder) 7g/l sodium hydrosulphite ISg/l soda of 36 Be 30cc/l.
• Solane Blue R is a vat-dye of formula Subsequent removal of the product from the bath and oxidation in an oxygenated medium was effected. After rinsing, the product was washed by boiling with 2.5g/l of sodium carbonate and 2g/l of sodium lauryl sulfate.
• Blue dye S.B.A. conforms to a formula of the following chemical type In this case, oxidation had to be effected in a neutral medium in order to avoid changes in color. Processing was then by rinsing the product after dyeing and subsequent oxidation in a mixture of oxygenated water and acetic acid.
• a process for the dyeing of a material composed of cellulosic fibers deep colors which process comprises treating said material in a bath of liquid ammonia to impregnate the fibers of said material with said ammonia, and thereafter dyeing the ammoniaimpregnated fibers of said material in an aqueous dyebath containing a dyestuff for said cellulosic fibers.
• ammonia-impregnated cellulosic fibers of said material have up to about 40% of ammonia by weight of fiber.
• a process according to claim 2 which further comprises removing ammonia from said ammoniaimpregnated fibers prior to dyeing thereof to adjust the amount of ammonia.
• liquid ammonia is maintained at atmospheric pressure at a temperature below about -35C., and said dyebath is maintained at a temperature above about 20C. whereby ammonia is removed from said ammonia-impregnated fibers in said dyebath.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Coloring (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9098783

Family Applications (1)

Country Status (9)

Cited By (5)

Families Citing this family (1)

Citations (3)

Family Cites Families (2)

• 1972
  • 1972-05-18 FR FR727217922A patent/FR2184490B1/fr not_active Expired
• 1973
  • 1973-05-08 BE BE130878A patent/BE799251A/fr unknown
  • 1973-05-08 CH CH650273D patent/CH650273A4/xx unknown
  • 1973-05-08 CH CH650273A patent/CH550890A/xx unknown
  • 1973-05-10 GB GB2228273A patent/GB1388333A/en not_active Expired
  • 1973-05-14 DK DK264573AA patent/DK139036B/da not_active IP Right Cessation
  • 1973-05-16 DE DE2324687A patent/DE2324687C3/de not_active Expired
  • 1973-05-17 US US361255A patent/US3892521A/en not_active Expired - Lifetime
  • 1973-05-18 NL NL7307027A patent/NL7307027A/xx not_active Application Discontinuation
  • 1973-05-18 IT IT68459/73A patent/IT994542B/it active

Patent Citations (3)

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