Modified cation edible pigment cotton dyeing technique
A cationic modifier and food coloring technology, which is applied in dyeing, textile and papermaking, fiber treatment, etc., can solve the problems of low tinting strength, high cost, toxicity, etc., and achieve good modification effect, enhanced reactivity, and reaction strong effect
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[0040] Example one
[0041] A cationic modified food dye cotton dyeing process, which includes: cationic modification treatment → hot water washing → cold water washing ((3 times) → squeezing → drying → dyeing → water washing → soaping → water washing → drying;
[0042] The cationic modification prescription is: cationic modifier 4% owf; NaOH 2g / L; temperature 60℃; time 20min; bath ratio 20:1.
[0043] The dyeing prescription is: food coloring 5% owf; sodium sulfate 10g / L; pH 7; temperature 70℃; time 30min; bath ratio 20:1.
[0044] The preparation method of the cationic modifier includes the following steps in sequence: (1) Intermediate trimethylamine hydrochloride is generated by the reaction of concentrated hydrochloric acid and trimethylamine aqueous solution; (2) Trimethylamine hydrochloride is used as a solvent in ethanol React with epichlorohydrin to make the product. The mass fraction of concentrated hydrochloric acid in step (1) is 36% to 38%, and the mass fraction of trimet...
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[0045] Example two
[0046] A cationic modified food dye cotton dyeing process, which includes: cationic modification treatment → hot water washing → cold water washing ((3 times) → squeezing → drying → dyeing → water washing → soaping → water washing → drying;
[0047] Cationic modification prescription: cationic modifier 3% owf; NaOH is 1.5g / L; temperature is 50℃; time is 15min; bath ratio is 18:1;
[0048] Dyeing prescription: food coloring 4% owf; sodium sulfate 8g / L; pH 6; temperature 60℃; time 25min; bath ratio 18:1.
[0049] Among them, the preparation method of the cationic modifier includes the following steps in sequence: (1) Intermediate trimethylamine hydrochloride is generated by the reaction of concentrated hydrochloric acid and trimethylamine aqueous solution; (2) The trimethylamine salt is combined with ethanol as a solvent. The acid salt reacts with epichlorohydrin to obtain the product. The mass fraction of concentrated hydrochloric acid in step (1) is 36% to 38%, a...
Example Embodiment
[0050] Example three
[0051] A cationic modified food dye cotton dyeing process, which includes: cationic modification treatment → hot water washing → cold water washing ((3 times) → squeezing → drying → dyeing → water washing → soaping → water washing → drying;
[0052] Cationic modification prescription: cationic modifier 5% owf; NaOH 2.5g / L; temperature 70℃; time 25min; bath ratio 22:1;
[0053] Dyeing prescription: food coloring 6%owf; sodium sulfate 12g / L; pH value 8; temperature 80℃; time 35min; liquor ratio 22:1.
[0054] Among them, the preparation method of the cationic modifier includes the following steps in sequence: (1) Intermediate trimethylamine hydrochloride is generated by the reaction of concentrated hydrochloric acid and trimethylamine aqueous solution; (2) The trimethylamine salt is combined with ethanol as a solvent. The acid salt reacts with epichlorohydrin to obtain the product. The mass fraction of concentrated hydrochloric acid in step (1) is 36% to 38%, and...
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