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
  • D06P3/66—Natural or regenerated cellulose using reactive dyes
• • 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
  • D06P1/0004—General aspects of 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
• • 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 invention relates to a process for dyeing cellulose fiber materials with water-soluble reactive dyes in the presence of salt and alkalis by the exhaust process, for example on reel runners, jet dyeing systems, strand dyeing machines and apparatus.
• the process is characterized in that dye liquors are used, the respective dye content of which is not higher than the amount of dye required to produce a color depth difference visible on the fiber as unegality.
• the fiber is in each case ⁇ t in the form of small steps ⁇ s are only offered as much dye as can be chemically fixed by the fiber during this time under the given pH, salt and temperature conditions.
• the process according to the invention thus stands in contrast to the existing view that the higher the dye concentration in the dyebath, the easier it is to achieve level dyeing and that dye liquors with a low dye content are more likely to result in uneven dyeing than dye liquors with a high dye content.
• the amount of dye which produces a color difference which is still visible is ⁇ 10%, preferably 3-8%, preferably 4-6% of the total dye consumption of the dyeing.
• dyeing cellulose fibers with dye liquors containing reactive dye which do not contain the total amount of reactive dye required to achieve the desired depth of color at the same time, but are metered in in small increments over the entire dyeing time, can achieve better levelness than at the usual procedure in which the dye is added to the bath before the fixing conditions are reached and is then fixed on the fiber in the manner customary for reactive dyes by increasing the pH, by increasing the temperature or by adding salt.
• the process is carried out in such a way that the dye liquor is charged in the usual manner with salt and over alkali and then the dye is introduced into the main stream of the circulating dye liquor at least 2/3 of the total dyeing time.
• the process can also be carried out in such a way that not only the dye, but also the alkali required for carrying out the fixing reaction is fed into the bath continuously or independently, or that the dye is present during the first half of the dyeing period and then thereafter Alkali is continuously fed to the bath during the second half of the dyeing period.
• Suitable reel runners suitable for the method according to the invention are those which have a fleet circulation which is independent of the movement of the goods, as is the case with jet dyeing systems and apparatus.
• Suitable reactive dyes for the process according to the invention are at least one fiber-reactive group containing sulfo-containing dyes of the azo, anthraquinone and phthalocyanine series. It is particularly advantageous to use the method be 4 i dyes, which have a high substantivity and tend to irregularities under the usual dyeing conditions due to insufficient migration.
• Migration is understood to mean the ability of a reactive dye to migrate during the dyeing process from areas with a higher dye concentration on the fiber to areas with a lower dye concentration on the fiber, as described by M.Aoyagi and E.Ogawa. In Japan Textile News, July 1977, Pp. 95-98.
• Reactive dyes with high substantivity are understood to mean those which, in the presence of 50 g / 1 sodium sulfate on bleached cotton at 40 ° in equilibrium, have a substantial bath exhaustion of at least 50%.
• Suitable dyes are for example those with at least one mono-, dichlorotriazinyl, monofluorotriazinyl or at least one mono- or difluoro-pyrimidine, sulfatoethylsulfonyl, Ethylsulfonylbenzothiazoluite or 2,3-D ichlorchinoxalincarbonylou to call, which in the temperature range 30-100 ° and a pH of 9-12 and in the presence of 10-100 g / 1 salt can be dyed by the exhaust process.
• Suitable fiber materials for the claimed process are in particular those which, owing to their high affinity according to conventional processes in which the dye of the goods is offered at a high initial concentration, cannot be dyed safely and reproducibly.
• Such fiber materials preferably consist of in the yarn or in one piece mercerized cotton or rayon.
• Another advantage of the process according to the invention is that reactive dyes can also be used which, owing to the inadequate maximum solubility in the presence of table salt, cannot normally be used or can only be used for light tones.
• higher salt concentrations than usual can also be used without the dye precipitating out, and thus staining the goods, i.e. leads to unusable stains. In this way, a higher utilization of the dye used and thus a better economy are obtained with the same dye use.
• a surprising advantage of the method is the improvement in the simultaneous absorption of reactive dyes of different substantivity. While in conventional dyeing processes the substantive dye prefers and thus leads to an uneven product appearance on highly affine material, level dyeings can be achieved with the dyes according to the invention which, due to different mounting, tend not only to color depth differences, but also to color differences.
• the mixture is left to run for a further 10 minutes at the set temperature and then, after draining off the remaining liquor, rinsed cold and warm in the usual manner and soaped at the boil.
• the second solution consists of 99.7 parts water and 0.3 parts sodium hydroxide. After the dropping process has ended, the goods are treated for a further 10 minutes at 80 °, then the liquor is drained off and the dyeing obtained is rinsed cold and warm as usual and soaped at the boil. A level brown coloration is obtained.
• 100 parts of a piece of knitted cotton fabric are drawn into a commercially available jet dyeing machine and this is charged with 1400 parts of water at 25 °, 1.5 parts of 1,3-bis (ethylhexyl) glycerol ether 2-sulfate and 0.8 part of sodium bisulfate.
• the fleet is then at 70 0 with good goods and fleet circulation ; heated and 140 parts of sodium chloride in solid form added during the heating.
• the mixture After the temperature of 70 ° has been reached, the mixture is left to run at this temperature for 10 minutes and then gradually cooled to 45 ° in 120 minutes.
• 2 solutions are injected continuously and independently of one another at a slowly increasing feed rate into the rapidly circulating liquor.
• One solution consists of 2 parts of dye IV, 0.2 parts of sodium dihydrogen phosphate and 50 parts of water, the other solution of 1 part of sodium hydroxide in 50 parts of water.
• the mixture is treated for a further 20 minutes at 45 ° and then rinsed and soaped at the boil as usual. A level red coloration is obtained.
• 100 parts of a cotton yarn are treated on a commercial yarn dyeing machine for 15 minutes with 1000 parts of an 80 ° warm aqueous liquor which contain 50 parts of common salt. Subsequently, 100 parts of a solution containing 3.5 parts of the dye V and c, 5 parts of sodium bicarbonate are pumped in continuously at this temperature for 2 hours with the aid of a commercially available metering pump. After this time, the mixture is left to run for a further 5 minutes and then rinsed cold and warm as usual and soaped at the boil. A level green coloration is obtained.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6067746

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (8)

Citations (5)

Family Cites Families (3)

• 1979
  • 1979-04-07 DE DE19792914111 patent/DE2914111A1/de active Granted
• 1980
  • 1980-03-20 US US06/132,053 patent/US4372744A/en not_active Expired - Lifetime
  • 1980-03-25 EP EP80101555A patent/EP0017805B1/fr not_active Expired
  • 1980-03-25 DE DE8080101555T patent/DE3061395D1/de not_active Expired
  • 1980-03-25 AT AT80101555T patent/ATE2093T1/de active
  • 1980-04-04 JP JP4368680A patent/JPS55137281A/ja active Pending

Patent Citations (5)

Also Published As

Similar Documents

Legal Events