Textile dyeing technology
A textile and process technology, applied in the field of textile dyeing technology, can solve the problems of complex pretreatment modification method and affect the stability of dyeing solution, and achieve the effects of improving color fastness, color stability, and increasing stability
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Embodiment 1
[0033] Preparation of hematoxylin vegetable dye:
[0034] 1) After the hematoxylin is cut into pieces, it is subjected to vacuum freeze-drying treatment at -50°C for 10 hours, and then the dried aloe leaves are pulverized and passed through a 50-mesh sieve to obtain dry aloe powder.
[0035] Put the sumac dry powder into the extraction kettle, pass through supercritical methanol as the extractant, add ammonia water as the entrainer, the extraction temperature is 25°C, the extraction pressure is 7MPa, the extraction time is 10 minutes, the flow rate of methanol is 5L / h, and the entrainment Agent flow rate 0.1ml / min;
[0036] 2) decompress the supercritical methanol containing the extract to separate the extracted product, the separation temperature is 10°C, the separation pressure is 1MPa, and the obtained extract is collected;
[0037] 4) Concentrate to a creamy state, apply D-101 macroporous resin, wash with water and 10% ethanol in turn until the water is clear, and finally...
Embodiment 2
[0040] Preparation of hematoxylin vegetable dye:
[0041] Cut the hematoxylin into pieces and perform vacuum freeze-drying treatment at -50° C. for 10 hours, then crush the dried aloe leaves and pass through a 50-mesh sieve to obtain dry aloe powder.
[0042]1) Put the sumac dry powder into the extraction kettle, pass through supercritical methanol as the extraction agent, add ammonia water as the entrainer, the extraction temperature is 25°C, the extraction pressure is 6MPa, the extraction time is 15 minutes, and the methanol flow rate is 10L / h , entrainer flow rate 0.1ml / min;
[0043] 2) depressurize the supercritical methanol containing the extract to separate the extracted product, the separation temperature is 20°C, the separation pressure is 5MPa, and the obtained extract is collected;
[0044] 4) Concentrate to a paste, apply D-101 macroporous resin, wash with water and 10% ethanol in turn until the water is clear, and finally elute with 80% ethanol, remove the eluate ...
Embodiment 3
[0047] Textile dyeing process:
[0048] Step 1: Add dye and water into the dyeing vat, stir evenly, raise the temperature to 60°C at a heating rate of 4°C, keep it for 1.5h, add carbonic acid to adjust the pH of the dyeing solution to 5;
[0049] Step 2: Soak the textile raw material in the dyeing vat for 1.5-3.5 hours, then raise the temperature at a rate of 2-3°C / min, raise the temperature to 96°C and keep it for 2.5h; the bath ratio of the textile raw material is 1:18;
[0050] Step 3: drying, drying the soaked textile raw materials at 90°C;
[0051] Step 4: Fixing the color, immersing the raw material dried in step 3 in the fixing solution for 1-3 hours, and then drying at 90°C.
[0052] Step 5: Rinse, take out the textile raw material dried in step 4, immerse in clean water and rinse for 50 minutes, and add rinse agent;
[0053] Step 6: Dry, take out the rinsed textile raw materials and let them dry naturally.
[0054] Described fixative is the aqueous solution that gl...
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