Two-bath dyeing method for superfine fiber synthetic leather

[0029] (1) Pretreatment process

[0030] Put the superfine fiber synthetic leather into the high temperature and high pressure overflow dyeing machine, add 6g / L scouring agent, the bath ratio is 1:10, the temperature is 70°C, and the liquid is drained after scouring for 30 minutes.

[0031] The scouring agent in the step (1) is a commercial product, the scouring agent DM-1324 of Demei Chemical.

[0032] (2) dyeing process

[0033] Sulfur dye dyeing: add sulfur dye 3% (o.w.f.) and caustic soda 1g / L at room temperature, liquor ratio 1:5, run for 15 minutes and then heat up, 1°C / min to 60°C, then add hydrosulfite 5g / L and caustic soda 1g / L The mixture was kept warm for 30min, drained and washed with 0.1g / L acetic acid and 1.5g / L H 2 o 2 (35%) Oxidation at 50°C for 30min, then soaping agent SN-S 0.5g / L, soaping at 90°C for 30min to drain.

[0034] Acid dye dyeing: Add 1% (o.w.f.) acid dye at room temperature, 1% (o.w.f.) leveling agent, 0.5g / L acetic acid, 0.1g

[0041] (1) Pretreatment process

[0042] Put the superfine fiber synthetic leather into the high temperature and high pressure overflow dyeing machine, add 9g / L scouring agent, the bath ratio is 1:40, the temperature is 80°C, and the liquid is drained after scouring for 60 minutes.

[0043] The scouring agent is DM-1324 from Demei Chemical.

[0044] (2) dyeing process

[0045] Sulfur dye dyeing: add sulfur dye 8% (o.w.f.) and caustic soda 3g / L at room temperature, bath ratio 1:15, run for 20 minutes and then heat up, 3°C / min to 85°C, then add hydrosulfite 15g / L and caustic soda 2g / L The mixture was kept warm for 60min, drained and washed with 1g / L acetic acid and 3.5g / L H 2 o 2 (35%) Oxidation at 70°C for 60min, then soaping agent SN-S 2g / L, soaping at 100°C for 60min to drain.

[0046] Acid dye dyeing: add acid dye 5% (o.w.f.) at room temperature, leveling agent dosage is 3% (o.w.f.), acetic acid dosage is 2g / L, defoamer dosage is 0.5g / L, bath ratio 1:15,

[0053] (1) Pretreatment process

[0054] Put the superfine fiber synthetic leather into the high temperature and high pressure overflow dyeing machine, add 8g / L scouring agent, the bath ratio is 1:20, the temperature is 75°C, and the liquid is drained after scouring for 45 minutes.

[0055] The scouring agent is DM-1324 from Demei Chemical.

[0056] (2) dyeing process

[0057]Sulfur dye dyeing: Add sulfur dye 6% (o.w.f.) and caustic soda 2g / L at room temperature, liquor ratio 1:10, run for 18 minutes and then heat up, 2°C / min to 70°C, then add hydrosulfite 10g / L and caustic soda 1.5g / L of mixed solution, keep warm for 50min, wash with 0.5g / L acetic acid and 2g / L H 2 o 2 (35%) Oxidation at 60°C for 45min, then soaping agent SN-S 1g / L, soaping at 95°C for 45min to drain.

[0058] Acid dye dyeing: Add acid dye 3% (o.w.f.) at room temperature, leveling agent dosage 2% (o.w.f.), acetic acid dosage 1g / L, defoamer dosage 0.3g / L, bath ratio 1:10, 100℃ After heat