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
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/82—Textiles which contain different kinds of fibres
  • D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
  • D06P3/8223—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups
  • D06P3/8238—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using different kinds of dye
  • D06P3/8252—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using different kinds of dye using dispersed and reactive dyes
• • 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
  • Y10S534/00—Organic compounds -- part of the class 532-570 series
  • Y10S534/01—Mixtures of azo compounds
• • 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
  • Y10S8/92—Synthetic fiber dyeing
  • Y10S8/922—Polyester fiber

Definitions

• the dispersion dyestuffs are applied as far as possible in an acid medium, because the dyestuff dispersions have partly a low stability in the alkaline range and, additionally, at such high temperatures the action of the alkalis causes some of the dyestuffs to undergo chemical modifications which entail changes of the shade and loss of color yield as well as impairment of the fastness properties of the dyeings.
• Reactive dyestuffs require alkaline conditions in order to render possible the reaction with the hydroxyl groups of cellulose.
• a prolonged dyeing period however, especially at temperatures of more than 95 C, entails splitting of the dyestuff-fiber linkage which thus reduces the color yield on the goods.
• mixtures of cellulose fibers and fibrous materials of linear polyesters can be dyed in a single bath with reactive dyestuffs and dispersion dyestuffs by treating these materials at temperatures in the range of from about 20 to 80 C. with a bath which contains, in addition to the aforesaid dyestuffs, alkaline agents, then adjusting the pH of the bath to a value in the range of from 3.5 to 6 by the addition of a free acid and, finally, completing the dyeing at temperatures in the range of from about 95 to 140 C.
• the process of the present invention permits adjusting the pHvalue of the dyebath in such a manner that it corresponds to the respective fixing conditions of the reactive dyestuffs and dispersion dyestuffs, thus making the use of separate baths unnecessary. It is very surprising that hydrolysis of the linkage between the reactive dyestuff and the fiber does not take place at these high temperatures in the acid medium and that thus no loss of color yield occurs.
• the textile materials are treated with a bath which is kept at temperatures of about 20 to 80 C, preferably about 40 to 60 C, and which contains the dissolved reactive dyestuff, the dispersion dyestuff and the alkaline agents, for a period of time of 10 to 60 minutes, preferably to minutes; during this time the reactive dyestuff is fixed on the cellulose fiber.
• free acid is added to the dyebath until it shows a pl-l-value in the range of from 3.5 to 6.0, preferably 4.5 to 5.5.
• the dyebath is then heated to about 95 to 140 C. and kept for about 30 minutes to 3 hours, preferably 45 to 90 minutes, at this temperature.
• the dispersion dyestuff is fixed on the polyester fiber. If the fixation of the dispersion dye-stuff is effected at a temperature of about 95 to 110 C. it is of advantage to add a so-called carrier, either after the acidification or at the same time as the acid, to the dyebath. It is also possible to add the carrier already to the alkaline bath. After dyeing, the goods are rinsed and soaped and finished in the usual manner.
• the process of the present invention for the dyeing of mixtures of cellulose fibers and fibrous materials of linear polyesters in a single bath has the advantage over the hitherto .used two-bath process that by it the dyeing time is reduced by about 25 to percent.
• program controlled dyeing apparatuses it also offers another advantage: after the charging of the dyeing apparatus and filling of the required acid into the additional container connected with the dyeing apparatus, the dyeing program can proceed automatically, without operator, when using the process of the present invention. In the conventional two-bath process, the dyeing apparatus has to be charged twice.
• reactive dyestuffs there may be used in the process of the present invention organic dyestuffs which contain, as the reactive moiety, at least one vinylsulfone group or at least one group which during dyeing forms a vinylsulfone group by the action of the alkaline agerfts.
• organic dyestuffs those of the anthraquinone, azo and phthalocyanine series may be used; the azo and phthalocyanine dyestuffs may be metal-free or metallized.
• dispersion dyestuffs there may be used the dyestuffs well known for the dyeing of fibrous materials of linear polyesters, for example those of the series of azo or anthraquinone dyestuffs.
• the alkaline agents to be added to the dyebaths according to the process of the present invention may be applied in the quantities commonly used in the dyeing with reactivedyestuffs.
• the baths should contain the alkaline agents in such a quantity that their pH is adjusted to a value in the range of from 9 to 12 and maintained during fixation of the reactive dyestuffs.
• alkaline agents there may be used inorganic compounds having an alkaline action, for example sodium carbonate, sodium bicarbonate, trisodium phosphate, disodium phosphate, sodium hydroxide, sodium silicates, the corresponding potassium compounds or mixtures of these alkaline agents, preferably mixtures of sodium hydroxide solution and sodium carbonate.
• the free acid which is used according to the present invention for adjusting acid fixing conditions required for the application of the dispersion dyestuffs there may be used an inorganic acid such as hydrochloric acid, sulfuric acid or phosphoric acid, or an organic acid such, for example, as acetic acid or formic acid. Mixtures of these acids may also be used. Acetic acid is preferably used.
• the quantity of the free acid to be added to the dye baths after fixation of the reactive dyestuffs depends in the first instance on the alkali content of the bath and therewith indirectly on the quantity of reactive dyestuffs used, which again depends on the mixing ratio of the portions of cellulose and polyester fibers in the textile materi' als to be dyed.
• auxiliary agents known in the dyeing of polyester fibers, for example. o-phenylphenol, p-phenyl-phenol, benzoic acid alkyl esters and salicylic acid alkyl esters.
• the dyebaths may furthermore contain the usual adjuvants, for example electrolytes, wetting or dispersing agents.
• the textile materials to be dyed according to the process of the present invention which consist of mixtures of native or regenerated cellulose fibers and fibrous materials of linear polyesters, preferably polyethylene glycol terephthalate. may be present in the various forms ofmanufacturing, for example the form offlocks, bands, yarns, tissues or knit tissues.
• EXAMPLE l A mixture of polyester fibers and staple fibers, in a mixing ratio of 70:30, in the form of a yarn wound on taper bobbins, was dyed at a goods-to-liquor ratio of H5, for 30 minutes in a high-temperature dyeing apparatus at 60 C. with a bath containing, per litre of water, the following dyestuffs in commercial form and constitution:
• polyester portion of the fabric had an orange shade and the cellulose fiber portion a blue shade.
• a process for exhaust dyeing of a fibrous material composed of a mixture of cellulose fibers and linear polyester fibers in a single aqueous dyebath containing a reactive dyestuff and a disperse dyestuff which comprises treating said fibrous material at a temperature of about 20 C. to about 80 C. in an aqueous dyesbath that contains said reactive dyestuff. said disperse dyestuff and an alkaline agent to adjust the pH of said dyebath to between about 9 and about 12 until said cellulose fibers are dyed with said reactive dyestuff. adding a free The bath additionally contained, per liter of water:
• a navy blue dyeing was obtained in which the polyester and staple fiber portions of the mixed yarn were well dyed tone-ininorganic acid or a free organic acid to said dyebath to adjust AM 2 said pH to between about 3.5 and about 6, and completing the dyeing of a temperature of about 95 C. to about 140 C. until Dyeing was effected a manner analogous to that said polyester fibers are dyed with said disperse dyestuff.
• Said cellulose followmg dyestuffs fibers are dyed at a temperature of about 40 C. to about 60 CN C. l Hzz- Ha 3.

Landscapes

• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7104832

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (1)

Citations (3)

• 1967
  • 1967-03-03 DE DE19671619513 patent/DE1619513A1/de not_active Withdrawn
• 1968
  • 1968-02-27 US US708510A patent/US3617169A/en not_active Expired - Lifetime
  • 1968-02-29 CH CH296168D patent/CH296168A4/xx unknown
  • 1968-02-29 CH CH296168A patent/CH488857A/de not_active IP Right Cessation
  • 1968-03-01 SE SE02678/68A patent/SE329378B/xx unknown
  • 1968-03-01 AT AT200568A patent/AT282537B/de not_active IP Right Cessation
  • 1968-03-04 GB GB00361/68A patent/GB1187354A/en not_active Expired
  • 1968-03-04 BE BE711620D patent/BE711620A/xx unknown
  • 1968-03-04 FR FR1561507D patent/FR1561507A/fr not_active Expired

Patent Citations (3)

Non-Patent Citations (3)

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