Reactive dye ecological dyeing method of silk fabrics

Abstract

The invention provides a reactive dye ecological dyeing method of silk fabrics, which comprises the following steps of: (1) even dyeing: using reactive dye and decamethyl cyclopenta siloxane (D5) according to the mass ratio of 1:10 to 50 to prepare a reactive dye / D5 suspending dispersed liquid; padding the silk fabrics in 30 to 90 g / l of sodium bicarbonate solution; and dyeing the silk fabrics in the reactive dye / D5 suspending dispersed liquid with the rolling liquid rate of 160 to 200% at room temperature for 25 to 35 minutes, wherein the rolling liquid rate is used for ensuring even dyeing of the silk fabrics; and (2) color fixing: heating a mixture system obtained from the step (1) to 40 to 50 DEG C, and keeping the temperature for 20 to 30 minutes; then heating to 70 to 90 DEG C, and keeping the temperature for 20 to 30 minutes; and taking the silk fabrics out, and performing soap boiling. In the process of dyeing provided by the invention, an electrolyte is not added for dyeing acceleration, the dyeing rate of the dye is close to 100%, the fixing rate is higher than that of traditional bath dyeing, and the fastness of the fabrics is good after dyeing. Because the electrolyte is not needed for dyeing acceleration, the burden of treating dyeing waste water is effectively reduced, and the ecological environment is protected.

Description

technical field

[0001] The invention belongs to the technical field of dyeing and finishing, and in particular relates to an ecological dyeing method of reactive dyes using decamethylcyclopentasiloxane as a medium for silk fabrics. Background technique

[0002] For a long time, acid dyes and neutral dyes have been mainly used in silk fabric dyeing. Acid dyes have complete chromatograms and bright shades, but poor color fastness, especially poor fastness to wet treatment; neutral dyes have better color fastness than acid dyes, but there are fewer bright colors in their chromatograms. Reactive dyes have complete chromatograms, bright colors and low prices, and are increasingly valued by people for their excellent dyeing properties. The active groups in reactive dyes can undergo nucleophilic substitution or nucleophilic addition reaction with amino groups and imino groups in silk fibers to form covalent bonds, thus endowing dyed products with excellent wash fastness.

[0003] ...

Examples

Embodiment 1

[0029] Example 1 (C.I. Reactive Red 195):

[0030] 1. Dyeing formula:

[0031] Reactive dye (C.I. Reactive Red 195): 2% (o.w.f);

[0032] Silk fabric weight: 1g;

[0033]Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:30;

[0034] Squeezing rate: 160%;

[0035] Sodium bicarbonate concentration: 40g / l;

[0036] 2. Dyeing process:

[0037] (1) Level dyeing: According to the ratio, reactive dyes and decamethylcyclopentasiloxane (D5) are mixed to prepare reactive dyes / D5 suspension dispersions, and silk fabrics are padded in sodium bicarbonate solution, with 160% padding The liquid rate is placed in the reactive dye / D5 suspension dispersion at room temperature for 30 minutes;

[0038] (2) Color fixation: raise the temperature of the mixture system obtained in step (1) to 50°C, keep it warm for 20 minutes, then raise the temperature to 85°C, keep it warm for 20 minutes, the heating rate for both times is 4°C / min; take out the silk fabric , soaped, rinsed...

Embodiment 2

[0043] Example 2 (Anoxin Yellow L-H):

[0044] 1. Dyeing formula:

[0045] Reactive dye (Annuosu Yellow L-H): 2% (o.w.f);

[0046] Silk fabric weight: 1g;

[0047] Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:20;

[0048] Squeezing rate: 160%;

[0049] Sodium bicarbonate concentration: 30g / l;

[0050] 2. Dyeing process: The above dyeing formula is used, and the specific process is the same as in Example 1, except that in the color fixing step, the mixture system obtained in step (1) is heated to 50°C, kept for 20 minutes, and then heated to 70°C. ℃, keep warm for 30 minutes.

[0051] 3. See Table 3 and Table 4 for the performance test of the dyed silk fabric and the comparison results with the conventional water bath dyeing method.

[0052]

Embodiment 3

[0053] Example 3 (Annosol Red L-H):

[0054] 1. Dyeing formula:

[0055] Reactive dye (Annosal Red L-H): 2% (o.w.f);

[0056] Fabric weight: 1g;

[0057] Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:50;

[0058] Squeezing rate: 200%;

[0059] Sodium bicarbonate concentration: 80g / l;

[0060] 2. Dyeing process: The above dyeing formula is used, and the specific process is the same as in Example 1, except that in the color fixing step, the mixture system obtained in step (1) is heated to 50°C, kept for 20 minutes, and then heated to 70°C. ℃, keep warm for 20 minutes.

[0061] 3. See Table 5 and Table 6 for the performance test of the dyed silk fabric and the comparison results with the conventional water bath dyeing method.

[0062]

technical field

[0001] The invention belongs to the technical field of dyeing and finishing, and in particular relates to an ecological dyeing method of reactive dyes using decamethylcyclopentasiloxane as a medium for silk fabrics. Background technique

[0002] For a long time, acid dyes and neutral dyes have been mainly used in silk fabric dyeing. Acid dyes have complete chromatograms and bright shades, but poor color fastness, especially poor fastness to wet treatment; neutral dyes have better color fastness than acid dyes, but there are fewer bright colors in their chromatograms. Reactive dyes have complete chromatograms, bright colors and low prices, and are increasingly valued by people for their excellent dyeing properties. The active groups in reactive dyes can undergo nucleophilic substitution or nucleophilic addition reaction with amino groups and imino groups in silk fibers to form covalent bonds, thus endowing dyed products with excellent wash fastness.

[0003] ...

Examples

Embodiment 1

[0029] Example 1 (C.I. Reactive Red 195):

[0030] 1. Dyeing formula:

[0031] Reactive dye (C.I. Reactive Red 195): 2% (o.w.f);

[0032] Silk fabric weight: 1g;

[0033]Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:30;

[0034] Squeezing rate: 160%;

[0035] Sodium bicarbonate concentration: 40g / l;

[0036] 2. Dyeing process:

[0037] (1) Level dyeing: According to the ratio, reactive dyes and decamethylcyclopentasiloxane (D5) are mixed to prepare reactive dyes / D5 suspension dispersions, and silk fabrics are padded in sodium bicarbonate solution, with 160% padding The liquid rate is placed in the reactive dye / D5 suspension dispersion at room temperature for 30 minutes;

[0038] (2) Color fixation: raise the temperature of the mixture system obtained in step (1) to 50°C, keep it warm for 20 minutes, then raise the temperature to 85°C, keep it warm for 20 minutes, the heating rate for both times is 4°C / min; take out the silk fabric , soaped, rinsed...

Embodiment 2

[0043] Example 2 (Anoxin Yellow L-H):

[0044] 1. Dyeing formula:

[0045] Reactive dye (Annuosu Yellow L-H): 2% (o.w.f);

[0046] Silk fabric weight: 1g;

[0047] Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:20;

[0048] Squeezing rate: 160%;

[0049] Sodium bicarbonate concentration: 30g / l;

[0050] 2. Dyeing process: The above dyeing formula is used, and the specific process is the same as in Example 1, except that in the color fixing step, the mixture system obtained in step (1) is heated to 50°C, kept for 20 minutes, and then heated to 70°C. ℃, keep warm for 30 minutes.

[0051] 3. See Table 3 and Table 4 for the performance test of the dyed silk fabric and the comparison results with the conventional water bath dyeing method.

[0052]

Embodiment 3

[0053] Example 3 (Annosol Red L-H):

[0054] 1. Dyeing formula:

[0055] Reactive dye (Annosal Red L-H): 2% (o.w.f);

[0056] Fabric weight: 1g;

[0057] Mass ratio of reactive dye to decamethylcyclopentasiloxane (D5): 1:50;

[0058] Squeezing rate: 200%;

[0059] Sodium bicarbonate concentration: 80g / l;

[0060] 2. Dyeing process: The above dyeing formula is used, and the specific process is the same as in Example 1, except that in the color fixing step, the mixture system obtained in step (1) is heated to 50°C, kept for 20 minutes, and then heated to 70°C. ℃, keep warm for 20 minutes.

[0061] 3. See Table 5 and Table 6 for the performance test of the dyed silk fabric and the comparison results with the conventional water bath dyeing method.

[0062]

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