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
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/14—Wool
  • D06P3/20—Wool using mordant dyes using metallisable 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
  • 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
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/24—Polyamides; Polyurethanes
  • D06P3/241—Polyamides; Polyurethanes using acid 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
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/907—Nonionic emulsifiers for 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
  • Y10S8/92—Synthetic fiber dyeing
  • Y10S8/924—Polyamide fiber

Definitions

• the present invention relates to the dyeing of textile fabrics of polyamide fibers according to the dwelling process.
• non-woven articles have gained an ever-increasing importance. It is true that up to the present time predominantly cellulose fibers have been used as the basis for such fabrics, or at least those mixtures thereof in which only a comparatively small proportion consists of synthetic fibers. At present, this situation has changed in the sense that an increasing number of non-woven goods, especially fleeces, are sold in the market which consist entirely of synthetic fibers, predominantly of polyamide fibers. These goods may be dyed-the same as woven and knitted fabrics of polyamide material-according to the exhaust process either at the boil or under high temperature conditions.
• the said exhaust dyeing process is operated at temperatures within the range of from 90 to 135 C., preferably 95 to 130 C., the dyeing period depending on the polyamide source,'and on the aflinity as well as the diifusibility of the dyestulfs applied.
• the dyeing period generally ranges from 45 to 180 minutes.
• the dyeings so produced are after-treated in the conventional manner.
• dyeings which exhibit fast shades can be produced on textile fabrics of polyamide fibers by padding the said fibrous material with certain anionic dyestuffs, preferably selected 1:2-metal-complex dyestuffs, subsequently winding the material up and then allowing it to dwell for fixing the dyestulf.
• anionic dyestuffs preferably selected 1:2-metal-complex dyestuffs
• the dwelling process of the material padded with the dyestuffs is carried out according to the process of the invention at temperatures within the range of from 20 to 85 0., preferably at room temperature, for a period within the range of from 16 to 72 hours, peferably 16 to 24 hours.
• the dwelling time is increased by a fur- 3,788,807 Patented Jan. 29, 1974 ther 24 hours, the shade does not undergo any alteration.
• good color yields are obtained as well as normal fastness properties.
• an auxiliary agent for improving the solubility of the dyestuffs applied for example a mixture of a polyglycol, especially of a polyethylene glycol having a molecular weight ranging from to 1000, and a polyalkylene glycol monoalkyl ether of low molecular weight, depends in the process of the invention on the concentration of the coloring substance, and should be practiced at least in the case of amounts of from 10 grams of dyestuff/liter of padding liquor upward, preferably in a ratio of 1:1 (calculated on the weight of the dyestuif).
• the advantage of the process according to the invention resides in the insensitivity ,of the color yield with respect to alterations in the dwelling time.
• the said process can, therefore, be readily adapted to the sequence of operations of a textile finishing process. Largescale and expensive machinery can be dispensed with.
• the dyeing procedure according to the present invention is carried out as follows: The dyestuffs are made into a paste together with a mixture of a polyglycoland a polyglycol ether, then boiling water is poured over the paste to obtain an acceptable solution of the dyestuffs. Then auxiliary agents which act as thickeners for the padding liquor, for example on the basis of ethers derived from carob-bean flour, are added to this solution, and the padding liquor is made up with water to a total volume of 1 liter. The pH of the bath is adjusted to a value of approximately 6 to 7 by the addition of an organic or inorganic acid or by means of a buffer mixture.
• the fibrous material is padded using a goods-to-liquor ratio of from 120.1 to 1:3, normally 1:1, at a temperature within the range of from 20 to 65 C., and the material is wound up.
• the batched material is then covered with cotton cloths or plastic sheets to avoid local drying on the surface or along the lateral edges of the package.
• the moist material is stored in a room protected from draft of air, preferably at room temperature.
• the dwelling process may, of course, also be carried out at an elevated temperature in a padroll installation. However, in this case the expenditure on machinery and energy is higher. It is advantageous to rotate the package of the material during the fixing or dwelling period.
• 1:2-chromiumor lz2-cobalt-complex compounds of azo dyestuffs are advantageously used, that is to say complex compounds in which two molecules of an azo dyestuff or 1 molecule each of two azo dyestuffs which differ from one another are bound in complex form to a chromium or cobalt atom.
• the complex compound may contain, for example, a disazo dyestuff and a monoazo dyestuff or, preferably, two identical or different monoazo dyestuff molecules.
• groups forming metal complex compounds these azo dyestuffs preferably contain o,o'-dihydroxy azo groupings. Dyestuffs of said type are described in Colour Index, 2nd Ed. 1956, vol. 1.
• EXAMPLE 1 2.5 grams of the 1:2-chromium-complex compound of the dyestuff of formula C I. Acid Orange were made into a paste together with 2.5 grams of a mixture of 1 part of a polyethylene glycol having a molecular weight of approximately 400 and 1 part of ethyl diglycol, and hot water was poured over the mixture, in which proceeding an acceptable dyestuff solution must be formed. To this solution were added 100 to 150 grams of a thickener on the basis of ethers derived from carob-bean flour (in dilution with water of approximately 1:5).
• the starting solution was then made up with a warm water to a total volume of padding liquor of 1 liter, the heat content of the water being sufficient to adjust, the temperature of the liquor to 50 to 65 C.
• the temperature of the bath should not decrease to a value below 50 C. since otherwise there is a danger of the dyestuff precipitating.
• By means of addition of approximately 0.5 ml./l. of a 60% acetic acid in the course of formulating said bath it was possible to adjust the pH of the liquor to a value of 6 to 7.
• a polyamide spun fleece was padded on a padding machine (squeezing eflfect 80%, calculated on the weight of the dry textile material) at a goods-to-liquor ratio of 1:1 and at a temperature of the liquor of 50 C., and the material was then wound up.
• the material was then covered with plastics sheets (as is the usual procedure in any pad-bath process to prevent local drying on the surface and along the lateral edges of the package) and it was stored in this state at room temperature. Drafts of air should be avoided as far as possible.
• the dyed material was rinsed for 60 seconds with water having a temperature of 60 C., then it was soaped for minutes at approximately 85 C.
• EXAMPLE 3 grams of the 1:2-chromium-complex compound of the dyestuffs of formulae was made into a paste with denatured ethanol and dissolved in water. Using said padding liquor which was made up to 1 liter, in a manner analogous to Example 1, the pad-dyeing process was carried out in the manner as described in that example. In this manner a uniform dark anthracite was obtained on the polyamide fleece.
• a process for dyeing a bonded fleece of polyamide fibers to a uniform shade and depth of shade which comprises padding the fibers of said fleece with an aqueous liquor having a pH of 6 to 7 and which contains in solution a 1:2-chromiumor 1:2-cobaltcomplex compound of an anionic azo dyestutf or a mixture of such metal complex dyestuffs and an auxiliary agent consisting of a mixture of equal parts by weight of a polyethylene glycol having a molecular weight ranging from 150 to 1000 and a lower monoalkyl ether of a polyethylene glycol having 2 to 5 condensed ethylene oxide units, subsequently winding up the padded material and then allowing it in a moist state and in the wound-up condition to dwell at a temperature in the range of from 20 to 85 C. to fix the dyestuffs.

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=5778200

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (2)

• 1970
  • 1970-07-29 DE DE2037554A patent/DE2037554C3/de not_active Expired
• 1971
  • 1971-07-23 NL NL7110182A patent/NL7110182A/xx unknown
  • 1971-07-26 CH CH1097071D patent/CH1097071A4/xx unknown
  • 1971-07-26 CH CH1097071A patent/CH553277A/xx unknown
  • 1971-07-27 BE BE770549A patent/BE770549A/xx unknown
  • 1971-07-27 US US00166643A patent/US3788807A/en not_active Expired - Lifetime
  • 1971-07-28 FR FR7127665A patent/FR2099662A1/fr not_active Withdrawn
  • 1971-07-28 CA CA119,303A patent/CA964406A/en not_active Expired
  • 1971-07-29 GB GB3567171A patent/GB1361254A/en not_active Expired

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