Dyeing process of disperse dye dyeable polypropylene
A better dyeing process was obtained: dyeing solution concentration 1.0% (for fabric quality) fixing time 90min temperature 105C, bath ratio 1:50; disperse dye dyeable polypropylene filament coloring ratio higher than PP/PET fabric coloring Rate: Polypropylene fiber dyeing process Disperse dye coloring rate Figure 6 It can also be seen from the graph that the sample coloring rate varies with the liquid concentration. “See the scientific structure of ordinary polypropylene (pp) filaments. The molecular structure is tight and there is no space for dye molecules. Therefore, the dyeing is difficult, and the wearing performance of the fabric is poor. The excellent dyeing property of the disperse dye by the modifier is used. The pp is mixed with a certain proportion of the modifier and melt-spun to obtain a polypropylene filament which can be directly dyed with a disperse dye. The YBP test is used to screen the dyeing conditions of YBP, and the dyeing rates of silk and cloth samples under different process conditions are compared, and the optimal dyeing conditions are obtained. 1Experiment 1.1 The amount of raw materials and test equipment are 4%, 6%, 10%, respectively; disperse dye: disperse red (SBML) disperse blue (ZBLN), Fulong Yanhuang (SE~6GFL), diffusing agent (NNO), phosphoric acid Dihydrogen ammonium (or sodium acetate) acetic acid and the like. R-1180 high temperature and high pressure dyeing machine, photoelectric balance. 1.2 Experimental method Weigh 3g sample wire into the dyeing machine (40C dyeing), the heating rate is 2C / min, pH value is 4.5~5.0, rise to a certain temperature, keep warm for a certain time, then naturally cool to room temperature The sample is taken out and washed, and the volume of the washing liquid and the residual liquid are separately measured, and the concentration is determined by the standard working curve of the dye, and the coloring rate is calculated separately. 2 Results and discussion 2.1 The influence of the dyeing liquid concentration on the coloring rate is different Under the condition of dye solution concentration, the coloring rate of YBP sample is increased and decreased, but the concentration is increased, the color is deepened, the sample dyeing uniformity is good, no staining, streaking, etc. appear, and the coloring rate and sample color are considered. The relationship between the dyeing liquid concentration and the concentration of the dyeing solution is 5%~2 (the time is 120min, the bath ratio is 1:50, the temperature is 100t: the dye is Fulongyanhuang). 22 bath ratio The effect of the color ratio on different bath ratios, the YBP sample coloring rate is shown in Table 1. It can be seen from Table 1 that the bathing ratio is increased, the sample coloring rate is slightly increased, considering the cost and operation, generally choose 1:50 It is advisable that the fabric and the silk sample have good uniformity and no color difference. 23 The effect of fixing time on the coloring rate The coloring rate of the sample with different fixing time is prolonged, the coloring time is prolonged, and the coloring rate is increased. However, after more than 90 minutes, the coloring rate is not obvious, so the fixing time is selected at 90 minutes. Appropriate, silk-like colorless table 1 color rate with dye bath ratio change color rate and temperature relationship (dye concentration 1%, bath ratio 1:50, time 120min, dye is Fulong Yanhuang.) Note The dye is Fulong Yanhuang, the fixing time is 120min, the concentration is 1% (for fabric quality), the temperature is 100° [, the relationship between the coloring rate and the fixing time (dye concentration 1%, bath ratio 1:50) , the temperature is 100 ° [:, the dye is Fulong Yanhuang.) 2.4 The effect of temperature on the coloring rate At different temperatures, the coloring rate of the sample can be seen from the figure, the temperature rises, the coloring rate also rises, but the temperature After more than 120C, the feel of silk and fabric is obviously hard, and considering the factors of energy and equipment, it is generally slightly pressurized. The temperature is about 105C, the uniformity of silk dyeing is very good, no staining, and the color fastness is better. Ok, the coloring rate is higher. 25 The coloring rate of different samples improved the dyeing property, but the coloring rate of 6% of PET was only about 50%. The coloring rate of PP/PET fabric YBP-R tow and fabric for different dyes is shown in Table 2. Table 2 The dye uptake rate of several fabrics under normal pressure boiling dyeing, the sample red, yellow, yellow, yellow and brown YBP seersucker fabric data reported that the dyeing liquor concentration was 1%. Both were higher than the PP/PET fabric coloring rate. 3 Conclusion YBP filament The dyeing chromatogram is wide, can be dyed medium and light at normal temperature and pressure, and can be dyed dark with a little pressure; the dyeing performance is better than the dyeable polypropylene modified by PP/PET under the same conditions. The dyeing process is as follows: the dyeing bath concentration is 1% for the fabric quality), the fixing time is 90 minutes, the temperature is 105C, and the bath ratio is 150. 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