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
  • D06P5/20—Physical treatments affecting dyeing, e.g. ultrasonic or electric
  • D06P5/2022—Textile treatments at reduced pression, i.e. lower than 1 atm
  • D06P5/2033—Textile treatments at reduced pression, i.e. lower than 1 atm during dyeing
• • 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
  • D06B19/00—Treatment of textile materials by liquids, gases or vapours, not provided for in groups D06B1/00 - D06B17/00
  • D06B19/0005—Fixing of chemicals, e.g. dyestuffs, on textile materials
  • D06B19/0064—Fixing of chemicals, e.g. dyestuffs, on textile materials by a fixing bath
• • 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
  • D06P1/44—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 using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/46—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 using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
• • 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
  • D06P3/34—Material containing ester groups
  • D06P3/52—Polyesters
  • D06P3/54—Polyesters using dispersed dyestuffs
• • 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 present invention relates to an improved process for the semi-continuous dyeing of flat structures made from high-quality synthetic fibers.
• knit fabrics preferably manufactured from texturized polyester fibers
• the material is dyed in open width or in the form of hanks. Both methods have in common to require a relatively long time for dyeing in order to afford a good color yield. levelness and dye penetration.
• this operation is performed on a beam.
• the goods are wound up on a perforated cloth beam and penetrated first by a cold dyeing liquor and then by a dyeliquor that has been heated to dyeing temperature.
• the pressure in the vessel is generally reduced to about 10 mm of mercury or less but it may also be atmospheric pressure. In this case, the extraordinarily short reaction time is increased to only a slight extent.
• the fixing medium that has been prepared in a pressurized container preferably water of to 135C, in particular of C
• a pressurereducing valve is introduced, optionally via a pressurereducing valve, into the pressure vessel so as first to penetrate the goods on the perforated cylinder in such a manner that it enters the vessel through the goods from the interior of the cylinder.
• the liquor may be allowed to enter the cylinder through the goods, coming from the vessel.
• the liquor that has entered the evacuated vessel and which may also contain dyestuffs and/or adjuvants can be pumped back again, thus causing it to circulate through the goods several times.
• a thin fabric for example a cotton (calico) cloth, is advantageously wound up together with the printed material so as to protect the prints.
• azeotropic mixtures with organic solvents, or organic solvents alone may also be used as fixing media, the temperatures being adjusted accordingly.
• the fixing medium brings about a very rapid fixation of the dyestuff applied by padding and prevents the dyestuff from migrating to an undesired extent as well as from being dissolved off and thus giving shade differences at the ends (tailing) and sides (edge-to-edge shading) of the fabric.
• migration of the dyestuff is not impeded entirely so that levelness and dye penetration of the fabrics are substantially better than those obtained according to conventional continuous methods.
• the period required for the treatment is substantially shortened.
• the total time required for the dyeing operation is also shortened and the amount of water spent is reduced, since the aqueous fixing liquor can be used several times, where required via an adsorption column and regeneration.
• the fixing liquors are contaminated but a little and therefore pose hardly any sewage water problems.
• the process of the invention permits rationalizing the dyeing operation by fixing the first padded lot at the same time as the following lot is padded and wound up.
• EXAMPLE 1 A stretch knit fabric made of texturized polyester fibers was padded via a broad-stretching device at room temperature and with a liquor pick-up of 70 percent in an aqueous liquor containing, per liter,
• the goods were wound up loosely on a perforated cylinder, without intermediate drying, and the cylinder was placed into a pressure vessel. After the vessel had been closed, the pressure was greatly reduced.
• a fixing liquor water of 130C, which had been prepared separately in a pressurized container, was allowed to enter the vessel so as first to penetrate the wound-up goods. After the treatment vessel had been filled, the liquor was pumped back into the container, and the pressure in the vessel was allowed to come to normal. The goods were then withdrawn and rinsed with warm and cold water.
• a red dyeing was obtained having very good levelness and dye penetration even inside the stretch knit fabric.
• the feel and structure of the goods were not deteriorated.
• the pH of the liquor was adjusted to 5 by means of acetic acid.
• the material was wound up loosely on a perforated cylinder, without intermediate drying, and the cylinder was placed in a pressure vessel which was closed. Pressure in the vessel was then greatly reduced and water of 130C was introduced, as a fixing liquor prepared in a separate pressurized container, into the pressure vessel so as first to penetrate the wound-up goods.
• the fixing liquor was forced to circulate in the indicated direction for a short time (1 to 2 minutes) and then pumped back into the container. After equalization of pressure the dyed goods were withdrawn and rinsed with warm and cold water.
• EXAMPLE 3 10 g of the dyestuff of the formula and 5 g of the dyestuff of the formula N11 O OH n I II I 011 N H were first pasted up with g of cold water, and the paste was then dispersed with 300 g of boiling water. This dispersion was then stirred through a fine-meshed sieve into 600 g of a thickening consisting of a mixture of 300 g of crystal gum (25 and a 12 percent aqueous solution of the addition product of 2000 mols of ethylene oxide on 1 mol of stearic acid.
• the printing paste thus obtained was printed on a knit fabric made from texturized polyester fibers, and the fabric was dried.
• the dried goods were then wound up on a perforated cylinder and placed in a pressure vessel which was closed.
• a fixing medium which had been prepared in a separate pressurized container, water of C was fed in the treatment vessel as quickly as possible so as first to penetrate the goods wound up on the cylinder.
• the fixing liquor was pumped back into the container, pressure was released, and the goods were withdrawn and rinsed with warm and cold water.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Coloring (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=5840518

Family Applications (1)

Country Status (13)

Families Citing this family (4)

Citations (5)

Family Cites Families (1)

• 1972
  • 1972-03-29 DE DE19722215297 patent/DE2215297B2/de active Granted
• 1973
  • 1973-03-16 ZA ZA731830A patent/ZA731830B/xx unknown
  • 1973-03-26 US US344968A patent/US3899291A/en not_active Expired - Lifetime
  • 1973-03-27 JP JP48034204A patent/JPS496277A/ja active Pending
  • 1973-03-27 IT IT22223/73A patent/IT981668B/it active
  • 1973-03-27 DD DD169747A patent/DD103938A5/xx unknown
  • 1973-03-27 CH CH441473A patent/CH573016B5/xx not_active IP Right Cessation
  • 1973-03-27 SE SE7304275A patent/SE391355B/xx unknown
  • 1973-03-27 CH CH441473D patent/CH441473A4/xx unknown
  • 1973-03-27 BR BR732175A patent/BR7302175D0/pt unknown
  • 1973-03-28 CA CA167,347A patent/CA995860A/en not_active Expired
  • 1973-03-28 GB GB1488273A patent/GB1420146A/en not_active Expired
  • 1973-03-29 FR FR7311297A patent/FR2178165B1/fr not_active Expired
  • 1973-03-29 BE BE129435A patent/BE797525A/xx unknown

Patent Citations (5)

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