A process for printing and dyeing animal skins with dragon fruit juice
A technology of dragon fruit juice and animal skin, applied in dyeing, azo dyes, organic dyes, etc., to achieve the effect of improving utilization rate, not easy to break, and high toughness
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Embodiment 1
[0032] This embodiment discloses a process for printing and dyeing animal skins using pitaya fruit juice, comprising the following steps:
[0033] 1) Extraction of dye:
[0034] a) take pitaya peel, crush and beat to obtain fruit pulp;
[0035] b) The fruit pulp obtained in step a) was subjected to wall-breaking treatment for 8 minutes under the condition of ultrasonic power of 500W to obtain a crude extract;
[0036] c) adding NaCl with a mass of 0.06% of the mass of the crude extract to the crude extract obtained in step b), and adding water 3 times the volume of the crude extract to obtain a dilution;
[0037] d) the dilution obtained in step c) was washed with Na 2 CO 3 Adjusting the pH of the solution to 6.5, leaching at a temperature of 38° C. for 1 hour to obtain an extract;
[0038] e) filtering the extract obtained in step d), and taking the filtrate to obtain a dye;
[0039] 2) Printing and dyeing of leather:
[0040] a) adding rare earth chloride to a hydrochl...
Embodiment 2
[0044] Present embodiment step 1) the extraction process of dyestuff is identical with embodiment 1, and the feature of present embodiment is: described step 2) in the printing and dyeing process of leather as follows:
[0045] a) Add cerium trichloride and lanthanum chloride in the hydrochloric acid solution that pH value is 4, wherein the mass ratio of cerium trichloride and lanthanum chloride is 1:2, and cerium chloride and lanthanum chloride account for 2% in the hydrochloric acid solution The concentration is 0.5%, to obtain hydrochloric acid-cerium trichloride-lanthanum chloride solution;
[0046] b) soaking the tanned leather in the hydrochloric acid-cerium trichloride-lanthanum chloride solution obtained in step a) at a temperature of 30° C. for 1.5 hours to obtain prefabricated leather;
[0047] c) immersing the prefabricated leather obtained in step b) in a dyeing agent, dyeing at a temperature of 45° C. for 1.5 h, and then washing and drying to obtain a finished lea...
Embodiment 3
[0049] Present embodiment step 1) the extraction process of dyestuff is identical with embodiment 1, and the feature of present embodiment is: described step 2) in the printing and dyeing process of leather as follows:
[0050] a) adding rare earth chloride to a hydrochloric acid solution with a pH value of 4, wherein the concentration of rare earth chloride is 0.4%, to obtain a hydrochloric acid-rare earth solution;
[0051] b) Soaking the tanned leather in the hydrochloric acid-rare earth solution obtained in step a) at a temperature of 25° C. for 2 hours to obtain prefabricated leather;
[0052] c) immersing the prefabricated leather obtained in step b) in a dyeing agent, dyeing at a temperature of 40° C. for 1 hour, and then washing and drying to obtain a finished leather.
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