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
  • D06P3/58—Material containing hydroxyl groups
  • D06P3/60—Natural or regenerated cellulose
  • D06P3/68—Preparing azo dyes on the 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
  • D06B11/00—Treatment of selected parts of textile materials, e.g. partial dyeing
• • 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
  • D06P1/0096—Multicolour dyeing
• • 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

Definitions

• the present invention relates to a process for the space-dyeing of cellulose fibers.
• German Patent No. 1,244,104 it is known to dye yarn containing cellulose fibers with reactive dyestuffs irregularly in such a manner that no repetition of pattern occurs on the finished textile materials after the yarn thus dyed has been woven or knitted.
• this dyeing method known as space-dyeing, an alkaline reactive dyestuff solution is injected into the wound-up fibrous material at different places and the wound package is then allowed to dwell until the dyestuff has reacted with the cellulose.
• the number of shades obtained in the bobbin depends on the number of injection locations chosen.
• pretreatment of the wound-up yarns with the impregnation baths containing the alkaline substances and the coupling components is advantageously carried out in a dyeing apparatus, for example a device for dyeing cross-wound bobbins.
• This process step ensures simultaneous impregnation of a large number of bobbins and thus does practically not reduce the production rate, especially since the second lot can be already impregnated while the bobbins of the first lot are injected with the solution of the diazo components.
• the wound packages pre-treated with alkali and coupling component can be stored and taken to use at any time and in any amount since the impregnated bobbins, after drying, are stable upon storage for an almost unlimited period of time if care is taken that any access of moisture is prevented.
• coupling components are used, preferably those of substantive nature toward the fibrous material.
• arylamides of aromatic or heterocyclic o-hydroxycarboxylic acids or of acylacetic acids are, for example, the arylamides of 2,3-hydroxy-naphthoic acid, 2-hydroxyanthracene-3- carboxylic acid, 4-hydroxy-diphenyl-3-carboxylic acid,
• 2-hydroxy-carbazole-3-carboxylic acid 3 -hydroxydiphenylene-oxide-Z-carboxylic acid 3-hydroxydiphenylenesulfide-2-carboxylic acid, aceto-acetic acid or of benzoylacetic acid.
• hydroxybenzenes, polyhydroxy-benzenes, hydroxynaphthalenes and pyrazo-lones have proved suitable among others, which may be substituted by non-ionic radicals.
• any inorganic alkaline substance may be used in the impregnation baths; preferably sodium hydroxide solution.
• These baths may also contain commercial-type non-ionic or anionic wetting agents for a better penetration of the yarn; for example wetting agents on the basis of the reaction products of alkylene oxides with alkyl phenols, of mixtures consisting of high-molecular oxyalkylation products of alkanols or alkyl-phenols and alkyl-sulfuric acid esters of alkaneor alkyl-aryl-sulfonic acids, or of naphthalene-sulfonic acid derivatives.
• the fibrous material is treated with the impregnation bath fo r 10 to 40 minutes, preferably for 30 minutes, at a temperature of from 20 to50C, preferably at room temperature.
• the bobbins After impregnation, the bobbins are centrifuged or sucked and can immediately be conducted to injection while still moist. Intermediate drying of the pre-treated goods is not necessary but it results in a higher liquor absorption during the subsequent injection since the fibrous material has a better absorptive power when dry.
• any primary aromatic amine may be used, which yields water-insoluble mono-, disor polyazo dyestuffs with the above-specified coupling components, thus the tetrazonium compounds of aromatic diamines and the fast color salts obtainable by stabilization from the corresponding amines, too.
• the said suitable amines among them amino-azo dyestuffs, have no ionic substituents.
• aqueous solutions are prepared from the substances chosen, a mixture is composed from at least two of these solutions and a small amount of each solution is applied in a drop to a filter paper that has been preliminarily impregnated with the alkaline solution of a coupling component and dried.
• this test demonstrates that a peripheral zone having a shade different from that of the center of the drop applied is obtained on the substrate.
• the acid solution of the diazonium compounds is injected under pressure into the package that has been pre-treated with the coupling component, at least at one selected portion of the wound material.
• the coloring liquid thus spreads out along the limited injection zone, so that along the length of the yarn of the wound package, dyed and undyed areas of varying lengths are produced at quite irregular intervals.
• the amount of the diazonium compounds injected may, of course, be varied. It depends on the desired ratio of dyed and undyed yarn.
• the injection of the dyeing liquor at several locations may be carried out separately or simultaneously. To obtain a definite non-repeating pattern the injection positions must, of course, be selected in a suitable manner.
• diazonium solutions that yield patterns of different shades upon development with the coupling component may also be injected into the package, either separately or simultaneously.
• the injection mechanism contains as the most essential element a hollow injection needle which has a perforated shaft (for more details see Astrodyed (registered trademark) Technical Manual, Astro Dye Works, lnc., Calhoun, Ga. 3070l/USA, page 12, FIG. 14).
• the length of the needle approximately corresponds to the thickness of the wound package to be treated.
• the position of the injection needle support can be rearranged so that the point of the injection needle can penetrate the package from the outside yarn layer to a desired position inside the thickness of the winding, whereupon the inflow of the dyeing liquor sets in. The flow of the liquor may be stopped again by a reversed motion of the needle support.
• aqueous solutions of the diazo components are injected into the wound-up fibrous material.
• the pH value of these solutions is adjusted to 4.5 6.9 by means of known buffer mixtures or weak acids, especially acetic acid.
• it is suitable to add commercial-type non-ionic dispersants, for example on the basis of the reaction products of alkylene oxides with cresol-camphor resins, or of mixtures consisting of oxyalkylated fatty alcohols and high-molecular-weight polyglycol ethers, to the injection solutions.
• the degree of diffusion of the individual components can be varied by a special selection of the acid or alkali-binder used in the diazonium salt solutions to be injected.
• the bobbins After injection of the diazo components, the bobbins are allowed to dwell for a short time, optionally for up to 5 minutes, and then after-treated as usual and dried.
• the dyeings produced according to the invention show the good fastness properties typical of the ice colors.
• the cellulose fibers may be present in natural or regenerated form. What has been said for the dyeing of yarn is also true for the dyeing of sliver.
• EXAMPLE Six hundred and fifty Grams of wound-up cotton yarn were treated at 20C for 30 minutes in a dyeing apparatus, at a goods-to-liquor ratio of l 25, with the impregnation bath hereinafter disclosed. The wound package was then sucked and dried. At different locations of the bobbin, the below-indicated injection solutions (1) and (2) were injected into the ball of yarn thus impregnated, the liquor absorption of the fibrous material being percent, calculated on the weight of the dry goods. The textile material dyed in this manner was then allowed to dwell for 5 minutes and then aftertreated, in a dyeing apparatus, as usual and dried. lmpregnation bath 3.5 Grams of the compound of the formula were dissolved in 3.5 cc.
• a bobbin was obtained, the yarn of which showed, in the core of the injection location, an intense brown red shade with mixed solution 1 and, at the corresponding peripheral zone, a yellow shade in a reduced breadth.
• the mixed solution 2 yielded, in the center of the injection location, a medium brown shade and, in the quite large peripheral zone, a bright brilliant golden yellow shade.

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=5788710

Family Applications (1)

Country Status (13)

Cited By (2)

Citations (4)

• 1970
  • 1970-11-20 DE DE2057230A patent/DE2057230C3/de not_active Expired
• 1971
  • 1971-11-15 NL NL7115668A patent/NL7115668A/xx unknown
  • 1971-11-15 ES ES397030A patent/ES397030A1/es not_active Expired
  • 1971-11-17 CH CH1671571A patent/CH554710A/xx unknown
  • 1971-11-17 CH CH1671571D patent/CH1671571A4/xx unknown
  • 1971-11-18 IT IT31289/71A patent/IT940683B/it active
  • 1971-11-18 AU AU35872/71A patent/AU3587271A/en not_active Expired
  • 1971-11-18 US US00200166A patent/US3787175A/en not_active Expired - Lifetime
  • 1971-11-18 ZA ZA717748A patent/ZA717748B/xx unknown
  • 1971-11-19 GB GB5383571A patent/GB1368129A/en not_active Expired
  • 1971-11-19 SE SE14812/71A patent/SE365265B/xx unknown
  • 1971-11-19 CA CA128,061A patent/CA962009A/en not_active Expired
  • 1971-11-19 FR FR7141497A patent/FR2115278B1/fr not_active Expired
  • 1971-11-19 BE BE775580A patent/BE775580A/xx unknown

Patent Citations (4)

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