The better dyeing process was obtained: dye concentration 1.0% (for fabric quality) fixation time 90min temperature 105C, bath ratio 1:50; the dyeing rate of disperse dyeable polypropylene filaments was higher than that of PP/PET fabrics Rate: Polypropylene fiber dyeing process disperse dye color rate Figure 6 can also be seen from the figure sample color rate with liquid concentration oil "see engaged in research common polypropylene (pp) filament molecular structure is tight, no room to contain dye molecules, Therefore, the dyeing is difficult, and the poor performance of fabrics makes use of the excellent dyeing property of the disperse dyes of the modifiers. The pp and a certain proportion of the modifiers are uniformly mixed and then melt-spun to obtain a polypropylene filament that can be directly dyed with the disperse dyes. The YBP test for the YBP dyeing process conditions were screened, and the dyeing rate of silk samples and cloth samples under different process conditions were compared, and the optimal dyeing process conditions were obtained.
1 Experiment 1.1 The amount of raw materials and test equipment were 4%, 6%, and 10%, respectively; Disperse dyes: SBML Disperse Blue (ZBLN), Fucron Yellow (SE-6GFL), Diffusion (NNO), Phosphoric Acid Dihydrogen ammonium (or sodium acetate) acetic acid, etc.
R-1180 type high temperature and high pressure dyeing machine, photoelectric balance.
1.2 Experimental method Weigh 3g sample wire into the dyeing machine (40C into the dye) to heat up, heating rate is Bu 2C/min, pH value is 4.5~5.0, rise to a certain temperature, hold for a certain time, and then naturally cooled to room temperature The sample is taken out and washed, and the volumes of the washing solution and the residual solution are measured respectively. The concentration of the washing solution and the residual solution are determined by the standard work curve of the dye. The results of the calculation of the color rate 2 and the effect of the 2.1 concentration of the dye solution on the coloring rate are different. Under the conditions of dye concentration, the coloration rate of YBP sample was increased, but the concentration was increased, the color became darker, the sample dyeing uniformity was better, no spots, stripes, etc. appeared, and the coloring rate and sample color were taken into consideration. Shallow depth, choose the concentration of dye solution 0.5%~2 off compared to the appropriate concentration of dyeing rate and dye concentration (time 120min, bath ratio 1:50, temperature 100t:, the dye is Fulong yellow.) 22 bath ratio When the bathing ratio is different, the YBP sample coloring rate is shown in Table 1. As can be seen from Table 1, when the bath ratio is increased, the coloring rate of the sample is slightly increased. In consideration of cost and operation, the general choice is 1:50. Appropriate fabric and silk sample uniformity, no color.
23 Fixing time influence on the coloring rate The coloring rate of the different fixing time shows the fixing time prolonged and the coloring rate increases. However, after 90 minutes, the coloring rate does not increase significantly. Therefore, the fixing time is selected at 90 minutes. Appropriately, silk samples without color difference Table 1 Coloration rate changes with dye bath ratio Coloring rate and temperature (dye concentration 1%, bath ratio 1:50, time 120 min, dye Fulong yellow.) Note : The dye is fulong yellow, fixing time is 120min, concentration is 1% (for fabric quality), temperature is 100° [, relationship between dyeing rate and fixing time (dyeing concentration 1%, bath ratio 1:50) ,Temperature 100°[ :,The dye is Fulong Brilliant Yellow.) 2.4 Effect of Temperature on Shading Rate At different temperatures, the colouring rate of the sample can be seen from the figure, the temperature rises, the colouring rate also rises, but the temperature After 120C, the feel of silk and fabric is obviously hardened. At the same time, energy and equipment factors are taken into account. Generally, the pressure is slightly increased. The temperature is about 105C. The dyeing uniformity is very good. There is no stain, and the color fastness is also relatively low. Well, the color rate is higher.
25 The coloring rate of different samples improved the dyeing performance, but the coloring rate when the amount of PET added was 6% was only about 50%. The coloring rates of PP/PET fabric YBP-R tow and fabric for different dyes are shown in Table 2. Table 2 The dye uptake rate of several kinds of fabrics under normal pressure boiling dyeing. Samples of red blue yellow yellow brown YBP seersucker fabrics reported that the concentration of dyeing solution was 1%. All higher than the PP/PET fabric dyeing rate. Conclusion YBP filaments Staining width, under normal temperature and pressure can be dyed, light color, slightly pressurized can be dyed dark; dyeing performance is better than under the same conditions using PP / PET blended modified polypropylene.
The best dyeing process conditions: dye bath concentration of 1% on the fabric quality, fixation time of 90min temperature 105C bath ratio of 150, under this condition, fiber coloration rate of 87. 65%, fabric feel soft, not hard
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