A kind of printing and dyeing method of cotton fiber for infants and young children
A cotton fiber, infant technology, applied in the field of cotton fiber printing and dyeing for infants, can solve the problems of affecting the performance of cotton textiles, adverse effects of infants, cotton fiber strength reduction, etc., to improve dyeing performance, maintain strength, increase strong effect
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Embodiment 1
[0022] A printing and dyeing method of cotton fiber for infants and young children, comprising the following steps:
[0023] (1) Pretreatment: The cotton fiber was treated in a NaOH solution with a concentration of 15g / L at a temperature of 85 °C and a bath ratio of 1:20 for 2 hours, and then rinsed and washed in a hydrogen peroxide solution with a concentration of 5g / L. Under the conditions of pH 8, temperature 50°C, and bath ratio of 1:20, the medium was treated for 0.5h, then washed with water and dried to obtain pretreated cotton fibers;
[0024] (2) Dyeing: placing the pretreated cotton fiber obtained in step (1) in a natural dye, and dyeing for 1 hour under the conditions of pH 5.5, temperature 70°C, and bath ratio 1:20;
[0025] (3) vacuum pressurization: placing the dyed cotton fibers in step (2) in a vacuum pressurizing tank, first vacuuming to a degree of vacuum of 0.06MPa, holding for 5min and then pressurizing to 0.3MPa, and maintaining the pressure for 1h;
[002...
Embodiment 2
[0032] A printing and dyeing method of cotton fiber for infants and young children, comprising the following steps:
[0033] (1) Pretreatment: The cotton fiber was treated in a NaOH solution with a concentration of 25g / L at a temperature of 90 °C and a bath ratio of 1:30 for 3 hours, then rinsed, and treated in a hydrogen peroxide solution with a concentration of 10g / L The medium was treated for 1 h under the conditions of pH 9, temperature 60 °C, and bath ratio of 1:30, then washed with water and dried to obtain pretreated cotton fibers;
[0034] (2) Dyeing: placing the pretreated cotton fiber obtained in step (1) in a natural dye, and dyeing for 1.5h under the conditions of pH 6.5, temperature of 80°C, and bath ratio of 1:30;
[0035] (3) vacuum pressurization: place the dyed cotton fiber in step (2) in a vacuum pressurized tank, first vacuumize to a vacuum degree of 0.08MPa, hold for 10min, pressurize to 0.5MPa, and maintain pressure for 2h;
[0036] (4) Color fixation: th...
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