Keywords: dye, fixing agent, cotton, reactive dye, colors, effects
0 Introduction reactive dyeing of cotton is the most commonly used dyes, the batch dyeing method is still the most widely used cotton knitwear) JnT method. Reactive dyes, based on the green, bright turquoise blue and black color is still the single ethylene sulfone reactive dyes, bifunctional reactive dyes are commonly used type.
In order to develop a color constant, that is, good reproducibility and to streamline the prescription of dyeing, dye suppliers for various light, medium and dark color recommended a different prescription. Dyeing workers can use the same manufacturer of two or three different color dyes into different prescriptions. These dyes are not necessarily a single dye, which can be a special mixture of dyes to get the exhaust rate, reproducible staining products.
As we all know, staining treatment is an important part of reactive dyeing to get the fastness properties. According to statistics, cotton knitwear dyeing dyeing process the total processing time of 30% to 35%, including a washing and a wash in a washing soap making a fixation of a post-processing. To meet the performance requirements of end-user fastness, dyeing products should not contain complete hydrolysis of not fixing dyes, but this may need to conduct additional soap making / leaching / washing treatment, which not only increases processing time but also increase water consumption.
Today, due to increasing water scarcity, therefore, addressed by increasing the washing process is actually not feasible, and this process there are drawbacks to increase the amount of sewage. To get the wet fastness, and optimize use of water, usually one or two after high-temperature cook-soap, dye fixing agent to "fixing" is not washed to remove the hydrolyzed dye, without affecting the wet fastness assessment. In addition, cationic dye fixing agent for post-processing, to prevent inappropriate storage of goods in the dyeing environment caused by the hydrolysis of dye contamination problems.
Cationic reactive dyes for dye fixing agent, is now considered to be eco-friendly products, they are not based on the reduction of formaldehyde products, and Formaldehyde products have different chemical properties. However, because each dye fixing agents of the formula change, their performance is also different. Dye fixing agent The main problem is stained by his treatment chemicals, causing the change in color and hue. Although the dye fixing agent vendor commitment to product impact on the color of a small, but the dye product by fixing treated shade is still difficult to predict.
India Sarex company researchers have conducted a study to examine the chemical dye fixative properties and the correlation between changes in shade. In this preliminary study, researchers conducted two sets of dark and color depth of color dyeing. There are dark blue dark purple dark reddish brown, dark green, the color gray, olive and brown, dyed products of the chemical by the four different types of dye fixing agent treated the impact of the color shade. =================@### Page ###@=================1 test method
1.1 fabrics were refined, bleached 100% cotton single jersey, the fabric samples from the production by the washing in the laboratory and then, in and to the pH value of 6.5.
1.2 dyes dark dye use Sumifix HF, Remazol RR, Remazol RGB; dye in the dye used Sumifix E-XF, Cibacron FN, Levailx CA. All dye samples by the dye manufacturer, for laboratory testing. Although the series of dyes with different colors of the stain, not entirely in the shade on the match, but the experimental manipulation to the color depth of dyed goods visual similarity as far as possible, to study the dye fixing agents on the impact of shade.
1.3 staining in the laboratory dyeing beaker dyeing machine dyeing, liquor ratio 1:10, according to manufacturers recommended standards dye staining technique.
1.4 soap making process by the alkali fixation after leaching with running water, 5 min, the middle with rolling liquid, with acetic acid to pH 6, at this pH value, temperature and washed 95 10 min. Re-flow of water washing 5 min, with 2% Kalium NNS and 2% Sarakol PS 98 in the temperature of boiling soap 10 min. Staining increased when a dark soap making, with the flowing water in the temperature
95 leaching 10 min, in and to the pH value of 6. Leaching and boiling water using soap soft water pH value of 6.5, liquor ratio 1:10 to keep. Soap-making efficiency by pre-test proved that to ensure hydrolysis dye fixing agent in the dye thoroughly before handling to remove.
1.5 dye fixing agent deal with use of four dye fixing agent, amount of 1% (owf), liquor ratio 1:10, pH value of 6,40 handling infected materials 15 min. Rolling car rolling to maintain uniform moisture content fluid, 100 drying and moisture content test.
1.6 the assessment of color computer and CIE LAB color measurement equation DA and DB assessed value, and products with no more dye fixing.
1.7 dye fixing agent fixing agent 1 #: Superfix AMGN Conc. Dicyandiamide Formaldehyde products; fixing agent 2 #: Sarafix NF 504 polyamine condensation product of epichlorohydrin; fixative 3 #: Sarafix. AP polyethylene polyamine condensation polymer; fixing agent 4 #: Sarafix. WP special formula, ultra-low formaldehyde type, at a temperature of 70 washing fastness (AATCC 61.3A) is stable. 2 Results and discussion The results shown in Table 1 to 6.
2.1 dye fixing agent of the dark green shade products affected
=================@### Page ###@=================spell color with Remazol RR stained dark green, the fixing agent shade # 1 biggest changes after treatment, while fixing the minimum dose of 4 # change. Four kinds of fixative treated dyed goods are so reddish and bluish color, but change to different degrees. Fight with Remazol RGB color, its color difference is much smaller than the Remazol RR, but the greenish color. When mixed colors with Sumifix HF, fixing agent 1 # fixing agent with the other three compared shade the greatest change. The dyes and Remazol RR, Remazol RGB comparison, color yellow, namely lack of Blu-ray.
2.2 The fixing agent of the purple shade of dark reddish brown dye products affect
Fight with Remazol RR purple dark reddish brown color, the shade serious bluish, which, to fixing agent 1 # most serious fixing agent 2 #, 3 # Second, fixing agent 4 # minimum; fight with Remazol RGB color, its color change is much smaller than the Remazol RR, but partial shade green. Among them, the fixing agent fixing agent # 1 and # 2 a great impact on the shade, while the fixing agent 4 # is the lowest impact on the shade; with Sumifix HF when mixed colors, fixing agent 4 # the greatest impact on the shade, and Reinazol RR and more dye Remazol RGB color, reddish yellow, fixing agent other three also have similar results.
2.3 The dark blue dye fixing agent of the impact of chemicals Shade
With Remazol I / I / mixed colors dark blue, the fixing agent # 1 greatest impact on the shade, its color becomes bluish and greenish three other fixing agent had a similar result, but the tone changes to different degrees. Fixative 3 # and 4 # to partial shade green, while fixing agent # 2 to partial shade more blue fight with Remazol RGB color, the fixing agent to shade # 1 become more green, the color looks so dyed goods some yellowing; the fixative on the dye 2 # Shade of goods and RR dyes with r totally lack, reddish and yellowish shade! the fixing agent 3 # and 4 # on the shade of more or less similar results.
Spell color with Sumifix HF, the fixing agent to shade # 1 become bluish and greenish, fixative 3 # make partial shade green, but the degree of bluish light. Fixing agent 4 # to make a more greenish hue. Very different, the fixing agent 2 # Queshi shade redder! Its shade of fixing agent and the other three treatment results to differ materially.
2.4 dye fixing agent of the brown shade of affected products
When using the Sumifix EXF dye, fixing agent # 2 to reddish yellowish hue serious, shade the greatest change. Fixative 3 # and 4 # enable color light yellow, while the DA value is not much change, while fixing agent 1 # make a slight shade of blue and green, and fixing the other three agents on the shade of different.
=================@### Page ###@=================when using the dye Cibacron FN fixing agent # 2 to shade redder, while the other three fixing agent to partial shade green. All of the dye fixing agent to shade bluish, DB is the highest value of fixing agent 1 #, the lowest fixing agent 4 #.
Use Levafix CA dyes, the four kinds of dye fixing agents are compiled to make shade of red. Which fixing agent 4 # on the shade of the lightest, but it is the only one to slightly yellowish shade dyed goods fixing agent.
2.5 dye fixing agent of the olive shade products affected
When using Sumitqx EXF dye, fixing agent # 2 to shade redder, while the other three fixing agent treatment, is so partial shade green. In addition to fixing agent # 1, the other three fixative little effect on the DB value. And the other three more fixing agent, fixing agent 1 # processed, more bluish shade.
For Cibacron FN dyes, fixing agents to shade red # 2, while the other three fixing agent to slightly greenish hue. Fixing agent 1 #, 3 # and 4 # enable color with yellow light, and only fixing agent # 2 to shade bluish.
Fight with Levafix CA dye color, in addition to fixing agent 4 #, the other three are so fixing agent reddish shade, and only fixing agent 4 # to partial shade green. In addition to fixing agent 3 #, the other three fixing agent DB value unchanged.
2.6 fixative shade of gray dye products affect
By Sumifix EXF dye, in addition to fixing agent 2 # make partial shade infrared, and other three-fixing agent to partial shade green. In addition, the fixing agent 2 # and 3 # to shade yellow, and the fixing agent 1 # ~ 13 to bluish shade. Fixing agent 4 # of DB values unchanged.
When using Cibacron FN dyes, and Sumitlx EXF dye similar fixative 2 # same to reddish shade, while the other three fixing agent to partial shade green. Here are four types of fixative so that the color bluish. Fixing Agent 3 # of DB values change smallest. Fight for Levafix CA series of gray color dye, in addition to fixing agent 4 # has no effect on the shade, the other three fixing agent to partial shade green.
For the color fixing agent DF 4 # of the lowest. This means: fixing agent 4 # on the impact of the lightest shade, which is olive, gray, and brown color is very important. But dark, does not have the conclusion.
=================@### Page ###@=================for the color of the dyes mixed colors, solid colors with 2 # to shade redder. The experiment, one can conclude that, for the color and dark, non-formaldehyde dye fixing agent is better than dicyandiamide Formaldehyde products, little effect on the shade. Based on these studies, workers can choose a suitable dyeing dye fixing agent to adjust the shade of the final product, in order to prevent staining by the dye fixative materials processed color changes caused by the problem of a different dye workers can self dyes prescription database study the various types of dye fixing agents of its shade.
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