Process of fixation in two stages of reactive dyes on textile matters.
The present invention relates to a fixing method in two stages of reactive dyes on textile materials. To secure impressions have been performed with reactive dyes were used either methods in a single step, in which case the alkali compound is contained in the printing inks, either methods called "two-step". In the latter is applied over the material, in a separate process step, after printing and, optionally, drying, the alkaline compound required. for fixing the dye and is secured either with saturated steam or by standing for several hours. The dyes can also be attached by treatment with an alkaline bath of electrolytes, hot. Gold, the applicant has found a method for printing on textile materials with reactive dyes on printing machines, in which is dispersed, on the printed material, a fixing bath alkali using knife-over-roll or a doctor blade and the dyes are fixed according to a two-step process. In a preferred embodiment of the invention is selected as a printing machine screen printing machine on rotary and is brought by pumping the fixing bath alkali, in front of the doctor blade, through a perforated distributor pipe. It is particularly advantageous that the perforated tube is placed at 1 a-'intérieur round without etching of a stencil, coaxially with respect thereto. The alkaline bath is then fed continuously by pumping, through a perforated distributor pipe positioned in front of the doctor blade, directly on the material and spread evenly by the doctor blade. In the case of goods dense or low absorption capacity it may be has boasted XU - work with two doctor blades mounted in series. It can be accomplished with either a doctor roll which is supported on a rubber support continuously transported and held of magnetic bars located below, either with a doctor blade. According to another advantageous embodiment of the invention worked with a printing machine roller. Is limited analytical also * and it is good D mode1 execution of the invention, omit the dispensing tube perforated and fixing bath effect feed alkali directly on the scraping device. An advantageous embodiment of the method is illustrated by Figure 1 of the attached drawing. 1 Yy.voit is in the printing cylinder center, in the embossing rollers 2, 3 in the sheet-like material, the dispensing tube 4 in perforated, in the doctor blade 5, 6 in the guide device and 7 the forerunner (band accompanying). The commodity is printed as usual, and then, after leaving, last roll having served in the printing, it is conducted, horizontally, to the doctor blade by means of a guiding device. On this step horizontal the commodity is possibly slightly dried (for example by infrared rays), and then the fixing bath is applied - either using the dispenser tube (4) which is just upstream of the doctor blade, either, without dispensing tube, directly on the doctor blade. When using a doctor blade dual this should cause the bath in the interval separating the two doctor blades. When it is not possible, for example of room, to drive the the web a horizontal path or when it is necessary to use all the rolls of scooters, advantageously a device is selected as shown in Figure 2 of the attached drawing. In all cases the fixing bath is applied immediately after the printing operation, an intermediate drying is not required. ' As alkali compounds, preferred are a mixture of sodium silicate and sodium hydroxide. Due to the high viscosity of the sodium silicate is the n1 ' need not be added to the admixture of thickener. When working with mixtures of alkali metal carbonates and hydroxides of alkali metals there is advantage to be added to the baths a thickener alkali-resistant, such as hydroxyethyl-cellulose, starch ether or thickeners of natural gums. After the application of the alkaline compound is allowed commodity, without intermediate drying, for several hours, preferably overnight, dyes then being attached. When the engineering equipment allows the enterprise, can also vaporize in a two-phase, during 10 to 60 seconds to 105 and 115 °, for example in a vaporizer arc. The method is suitable for a textile material of any type of preparation, for example a woven fabric, a knitted fabric or a fibrous web (nonwoven) cellulose alone or in blended cellulose with a polyester. As reactive dyes could be those containing β - ε υ ^ ^ θ ΐο - ℮Η groups 1 - 3 3 1 1 η ΐοην ℮, the P-phosphato-ethyl-sulfonyl, n-methyl-n - (3 a-sulfatoethyl) sulphonylamino, p sulfatoéthylamino alkylsulphonic, chloropropionylamino, the P-sulfatoethyl-to-carbonylamino-, phénylpropionylaminosulfonyles or 2, 2, 3, 3-tetrafluoro cyclobutane L-acryloylamino. By taking certain precautions, tending to decrease the sensitivity with regard to acid hydrolysis, for example by adding sodium acetate to print ink, may also be used, in the method of the invention, a series of reactive dyes responsive manner with cellulose esters, for example those bearing mono or dichlorotriazinyl or dichloropyridazinyl. When printing mixed fabrics made of cellulose fibers and polyester; printing pastes contain further disperse dyes of necessary for dyeing of the polyester portion as well as other auxiliaries. Reactive dyes has side printing pastes can also include salts of fast, in which case material is printed previously piétée. The method of the invention offers in particular the following advantages: an intermediate drying after printing is not necessary, it is not necessary additional machine for applying the fixing solution is suppressed and alkaline process step would have required this application. The finishing of the material is effected in the usual manner, by rinsing, washing and drying. The following examples illustrate the present invention. The numbers of dyes given in these examples were taken in the 3ème editing, the 1971 > "Color of indexes". EXAMPLE 1: 40 G of reagent is dissolved Chromophthal 13 (C.I. ID No. 18880) in 4 - 30 g of hot water and introducing the solution, while stirring, in 520 g of a thickening aqueous alginate to 4 Excellent sensation yellow color with good yield. EXAMPLE 2: Printed tissue regenerated cellulose is leached with a printing paste having the composition described in the example 1 and which contains as dye 40 g of c. i.. Red 22 (ci NO 14824). At the end of the printing machine there is a doctor blade in front of which projects, directly over the material, through a perforated tube, a solution of 200 g of sodium hydroxide to 38° Be, 400 g of water and 400 g of an aqueous solution to 3 Excellent sensation with a red color, EXAMPLE 3: Size is a mercerized cotton fabric with a solution of 20 g of the dye C.I. AzoicCoupl 37,505 NO. The COMP, 2, 954 CRAs ^ water heated to 90 and 95 °, 20 Cntf * sodium hydroxide and 6 cm. 38° Be ^ business of a dispersing agent and dried. It is then prints, using a machine sérigraphlque rotary, first with the printing paste to the example 1 and second with a printing paste prepared as described in the next paragraph. Is introduced, by dusting, 50 g of c. i.. NO 37005 diazotized and stabilized commercial, Azoic diazo based optoelectronic components. 2, and 20 g of I. Reactive Black 5 (C.I.No. 20505), while stirring rapidly, in a thickener master containing 860 g of water, 20 g of monosodium phosphate, 20 g of acetic acid to 50 At the end of the printing machine is arranged in front of which a knife over roll1 is projected, directly over the material, by a perforated tube, a solution comprised of 850 g of sodium silicate to 50° Be and 150 g of sodium hydroxide to 50 °bé. The material is then passed through a refrigeration evaporator and allowed to stand overnight. It is rinsed, washed and dried, as usual. Obtained side by side a yellow shade and shade dark brown with good fastnesses. EXAMPLE 4: 60 G of the dye is dissolved with blue Reactive 19 (ci NO 61200) in 430 g of hot water and is introduced, the solution in 500 g of a thickening aqueous alginate to 4 Then, at the end of the machine sérigraphlque rotary, is brought by pumping directly on the commodity, by a perforated tube before a doctor blade, a solution consisting of 750 recorded therein5 water, 10 g of starch ether alkali-resistant, 150 g of sodium carbonate, 150 g of sodium sulfate, 50 g of potassium carbonate and 100 recorded therein5 sodium hydroxide 58° Be, is drained and allowed to stand overnight. Rinsed, washed and dried as usual. Excellent sensation blue with good fastnesses. EXAMPLE 5: 60 G of reagent is dissolved Chromophthal 13 (c. i.. NO ΐ 888 θ) in 430 g of hot water and the solution is introduced, while stirring, in 500 g of 4 to aqueous alginate thickener With this printing paste is printed. mercerized cotton fabric on a printing machine roller. Immediately after printing, the web is deflected, as shown in Figure 1, so that it travels along a horizontal path. In front of the doctor blade is projected on to the material, through a perforated tube, a solution consisting of 900 cm in ^ sodium silicate to 58 - 60° Be and 2■ 100 cm of water. The solution thus applied is spread by the doctor blade. The material is then passed through a drier cold or slightly heated and allowed to stand for 24 hours to 6, advantageously covered with a plastic sheet. Rinsed, washed and dried as usual. Excellent sensation yellow color with good yield. When the sodium silicate solution is applied directly by a doctor blade proper, the same result is reached. EXAMPLE 6; 80 G of dissolved Reactive Black 5 (c. i.. NO 20505) in 410 g of hot water and introducing said solution into 500 g of 4 to aqueous alginate thickener With this paste is printed leached regenerated cellulose tissue. Is then applied, as in the example 5, a solution comprised of sodium silicate to 900 cm 55° Be ^ and 100 cm in sodium hydroxide 38° Be, directly by a doctor or by a perforated tube preceding the doctor. After an air passage for about 60 seconds is deposited the commodity without passing it through the dryer, is then covered and allowed to stand overnight. It is rinsed, washed and dried as usual. Black printing is achieved efficiently by color. Prepared, according to the example 5 given prescription Printing paste 1:60 gm/kg body weight. of rective Chromophthal 13 (c. i.. NO ΐ 888 θ) Printing paste 2:60 gm/kg Red 22 (c. i.. NO 14824) Printing paste 3:60 gm/kg of 19 with blue reagent (c. i.. NO 61200) Printing paste 4:60 gm/kg of I. Reactive Black 5 (c. i.. NO 20505) With these printing pastes, printed fabric mercerized cotton on a printing machine roller. Immediately after printing, the commodity is guided as shown in Figure 2. Applying a solution consisting of 950 CNRs silicate sodium 58° Be^50 centimeters and water, directly by a doctor or by a perforated tube preceding the doctor. The material is then passed through the drier cold or slightly heated and allowed to rest in a wet state during 6 to 24 hours, preferably covered with a plastic sheet. It is rinsed, washed and dried as usual. Drawing is achieved four color with .1 in color. 1459959 Printing with reactive dyes HOECHST AG 27 Oct 1975 [26 Oct 1974 6 Sept 1975] 44192/75 Headings D1B and D1L Textile materials e.g. mercerised cellulose are printed with reactive-dyes, the alkali necessary for dye fixation being applied by a doctor. Screen printing and roller printing machines may be used the alkali being applied via a perforated tube positioned in front of the doctor with respect to the direction of movement of the material. Fixation may be by cold dwelling or steaming. In Figs. 1 and 2 material web 3 is fed to a printing roller machine having printing cylinder 1 and printing rolls 2. The material passes around the cylinder on top of a backcloth 7 and is transported by rolls 6 at one of which the doctor 5 is provided, aqueous alkali being supplied by perforated distribution tube 4. 1. - Fixing method of reactive dyestuffs to des-textile materials, characterized in that, on printing machines, is distributed the fixing bath alkali using knife-over-roll or a doctor blade on the printed material and the dyes are fixed by a two-step method 2. The method according to paragraph 1 -, characterized in that the machine used to rotary screen. 3. Method according to paragraph 1 -, characterized in that there is used a roller printing machine.EXAMPLE THEREIN:
