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
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/15—Locally discharging the dyes
  • D06P5/155—Locally discharging the dyes with reductants
• • 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
  • D06P5/12—Reserving parts of the material before dyeing or printing ; Locally decreasing dye affinity by chemical means

Definitions

• the invention relates to two-phase printing processes for the production of conversion articles with reactive and vat dyes and of etching reserve articles with reactive and optionally vat dyes on cellulosic fiber materials, the reactive dye or a mixture of reactive and vat dye being printed or padded in a weakly acidic medium neutral, a stable reducing agent based on a sulfinic acid and optionally a vat dye containing overprinted, after an intermediate drying brings the pressure into contact with an aqueous / strongly alkaline liquor and dampens.
• the fiber materials to be dyed are printed with mixtures of reactive and vat dyes set to be slightly acidic, and these prints, after intermediate drying or advantageously in the same operation, overprinted with printing inks which contain stable reducing agents, for example sodium, in the neutral medium even under customary drying conditions - Formaldehyde sulfoxylate, contained in amounts of 100 to 200 g per kg of printing paste.
• the printed goods are passed through a strongly alkaline pad bath with about 100 to 200 g 32.5% sodium hydroxide solution per liter of liquor or equivalent amounts of sodium or potassium carbonate or water glass and then treated for about 5 to 30 seconds, preferably 10 to 20 seconds, with saturated steam or superheated steam.
• the dyes can also be used in other ways, e.g. by padding or splashing.
• the alkali can also be prepared by other methods, e.g. by splashing or spraying, are brought into contact with the coloring.
• Alkali or alkaline earth metal salts of sulfinic acids which resulted from a reaction with aldehydes or amines and were thereby stabilized, are considered as reducing agents, in particular sodium formaldehyde sulfoxylate.
• Formamidine sulfinic acid thiourea dioxide is also particularly advantageous.
• locust bean gum derivatives instead of the alginates usually used in combination with starch ethers when adding the printing inks, or to cause the pH to shift towards the neutral point by adding alkali.
• the technique described can now be transferred to the etched article by splitting the original dye application into two steps, i.e. the cellulosic fiber structure is printed with a printing paste or the reactive dyes or padded liquor (or splashed), then dried and then, as described for the conversion article, printed with a printing paste that contains a stable reducing agent and possibly one or more vat dye (e ) were incorporated.
• the process then continues as shown above. Background and possibly colored etching colors are fixed after the alkali passage during the short steaming operation.
• etching printing pastes such as the classic sulfoxylate process
• hygroscopic substances e.g. Glycerine, which had to be added, can be dispensed with in the process according to the invention because of the sufficient moisture absorption in the course of the alkaline block passage before steaming.
• etching prints do not need to be stored after steaming and, if appropriate, need to be cooled, which cannot be avoided in the traditional single-stage etching printing method for safety reasons, but can be further processed continuously.
• the durability of the printing inks and the prints before steaming is significantly better with a number of vat dyes than with the old etching printing processes with printing inks containing alkali and reducing agents.
• the reactive dyes which can be used in the process according to the invention both in the case of the conversion article and the etching article can be obtained from various organic base bodies, such as, for example, azo, anthraquinone or Phthalocyanine compounds, should be built up and should have at least one ß-hydroxyethylsulfonic sulfuric acid ester group, vinylsulfonyl group, monochlorotriazine group, dichlorotriazine group, 2,2,3,3-tetrafluorocyclobutane-1-acryloylamino group, vinylsulfonylamino group, ß-hydroxyethylsulfonylpylsulfonyl group, ß-hydroxyethylsulfonylylaminosylponylsulfonyl group, -, monofluorotriazine, 2,4-dichloroquinazoline, 1,4-dichlorophthalazine, alkylsulfon
• Suitable vat dyes include representatives with anthraquinone, indigoider and naphthoquinoid structure as well as naphthalene tetracarboxylic acid derivatives.
• All substrates of cellulosic origin are suitable for the process according to the invention, that is to say both native products such as cotton or linen, and also regenerated cellulose such as cellulose or viscose and their highly wet-strength variants.
• a cotton fabric is printed in a specific design with a printing ink of the following composition:
• the printed fabric is overprinted wet-on-wet in a different design with a printing ink containing 200 g / kg sodium formaldehyde sulfoxylate in the same thickening.
• the subsequently dried goods subsequently pass through an immersion bath with 100 g / l of 32.5% sodium hydroxide solution and 100 g / 1 of sodium carbonate and are then steamed in saturated steam for 20 seconds.
• the pressure is thoroughly rinsed with cold water, treated at 40-50 ° C with 2 g / l hydrogen peroxide and 5 ml / l acetic acid, rinsed again and finally with 0.5 g / l of a sodium oleic acid N-methyl taurides washed at 90 ° C, rinsed and dried.
• a print sample is obtained in red and golden yellow color with good fastness properties.
• the printed goods are processed and finished as in Example 1.
• the printed goods are processed and finished as in Example 1.
• a cotton fabric is padded on a foulard with a dye liquor with a squeezing effect of 100%, that per liter
• the padded and dried fabric is printed with a printing ink of the following composition:
• the printed and dried fabric is padded with a liquor absorption of 100% with an alkaline liquor, per liter contains and then steamed in saturated steam for 20 seconds. Then the goods are rinsed thoroughly with cold water, at 40 -50 ° C with 2 g / 1 hydrogen peroxide and Treated 5 ml / l acetic acid, rinsed again and finally washed with 0.5 g / 1 of a sodium oleic acid-N-methyl tauride at 90 ° C, rinsed and dried.
• the result is a scarlet-colored print on a brilliant blue background with good fastness properties.
• a cellular wool fabric which had been leached without tension with 4.5% sodium hydroxide solution is, as in Example 4, with a liquor per liter otherwise contains the same ingredients as in Example 4.
• a knitted cotton fabric is splashed with a dye liquor, which is washed with as set out in Example 4.
• the dried goods are printed with a printing ink per kg and after drying padded with an alkaline liquor (liquor absorption 100%), that per liter
• the goods are steamed for 15 seconds in saturated steam and then treated and finished as in Example 4.
• the result is a yellow print on a black background with good fastness properties.
• the padded and dried fabric is printed with a printing ink that comes out
• the printed goods After drying, the printed goods are passed through an alkaline liquor (squeezing effect 90%), which is per liter and then steamed in saturated steam for 20 seconds.
• alkaline liquor squeezing effect 90%
• the printed fabric is steamed for 8 minutes in saturated steam and then rinsed, reoxidized and washed as described in Example 4.
• the printed fabric is overprinted wet-on-wet in the same operation with a printing ink which contains 160 g of formamidine sulfinic acid in 600 g of a 5% aqueous solution of locust bean gum glycolate.
• the mildly dried product then passes through an immersion bath with 100 g / 1 32.5% sodium hydroxide solution and immediately afterwards a steamer in which it is steamed for 10 seconds in saturated steam.
• the pressure is then rinsed thoroughly with cold water, treated at 40-50 ° C with 2 g / 1 hydrogen peroxide and 5 cm 3 / l acetic acid, rinsed again and finally with 0.5 g / 1 of a sodium oleic acid N-methyl tauride at 90 ° C washed, rinsed and dried.
• the result is a print pattern with dark brown and yellow-green tones and good fastness properties.
• the printed goods are processed and finished as in Example 9.
• the result is a print pattern with red and blue colors and good fastness properties.
• a cotton cretonne is padded with a dye liquor at a squeezing effect of 100% on a pad, which per liter
• the padded and dried fabric is printed with a printing ink of the following composition, which has a pH of 6-7.
• the printed and mildly dried product is padded with a liquor containing 100% 32.5% sodium hydroxide solution per liter and immediately afterwards steamed for 10 seconds in saturated steam.
• the goods are then rinsed with cold water, treated at 40-50 ° C with 2 g / 1 hydrogen peroxide and 5 cm3 / 1 acetic acid, rinsed again and finally with 0.5 g / l of a sodium oleic acid-N-methyl tauride at 90 ° C washed, rinsed and dried.
• the result is a golden yellow print on a black background with good fastness properties.
• a fabric made of highly wet-strength regenerated cellulose fibers is padded, as in Example 11 , with a liquor containing 40 g of the commercial powder setting of the reactive dye of the formula per liter contains, in addition to the other ingredients described there, and after the subsequent drying is printed with a printing ink of the following composition:
• the fabric is further treated as in Example 11 .
• a cell wool fabric is, according to Example 11, splashed with a liquor per liter
• the dried fabric is printed with a printing ink which is constructed as in Example 11, but instead of the dye mentioned there
• the printed and mildly dried cellulose fabric is padded with a liquor absorption of 90% with a liquor containing 100 g 32.5% sodium hydroxide solution and 150 g sodium carbonate per liter, and then steamed for 10 seconds in saturated steam.
• the further treatment is carried out as in Example 11.
• the result is a yellow print on a brilliant red background with good fastness properties.

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

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Cited By (3)

Citations (4)

• 1980
  • 1980-06-26 DE DE8080103620T patent/DE3065361D1/de not_active Expired
  • 1980-06-26 EP EP80103620A patent/EP0021432B1/fr not_active Expired
  • 1980-06-30 BR BR8004086A patent/BR8004086A/pt unknown
  • 1980-06-30 AR AR281590A patent/AR222231A1/es active

Patent Citations (4)

Non-Patent Citations (2)

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