Novel dye liquor for polyester cotton one-bath and polyester cotton one-bath dyeing process

Abstract

The invention relates to the technical field of textile dyeing, in particular to novel polyester cotton one-bath dye liquor which comprises 10-15 parts of high-temperature reactive dye, 10-15 parts of salt-alkali-resistant low-temperature disperse dye, 1-5 parts of nano silicon oxide, 15-20 parts of alkaline agent and 50-60 parts of accelerating agent. The invention also provides a polyester-cotton one-bath dyeing process using the novel polyester-cotton one-bath dye liquor. Compared with the prior art, the novel polyester-cotton one-bath dye liquor contains the high-temperature reactive dye and the salt-alkali-resistant low-temperature disperse dye, and the nano silicon oxide is added, so that the novel polyester-cotton one-bath dye liquor is suitable for dyeing polyester-cotton fabrics at a relatively mild dyeing temperature in a one-bath one-step method.

Description

Technical Field

[0001] The invention relates to the technical field of textile dyeing, in particular to a novel polyester-cotton one-bath dyeing solution and a polyester-cotton one-bath dyeing process. Background Art

[0002] As people's demand for clothing changes, single-component fiber fabrics with single performance are gradually replaced by two-component or multi-component fiber fabrics, including polyester and cotton two-component blended fiber fabrics. This fabric has the moisture absorption and breathability of cotton fiber and the crispness and durability of polyester fiber, and thus has a huge market demand. In order to improve the aesthetics of the fabric, the fabric needs to be dyed. Since the chemical structures and chemical properties of cotton fibers and polyester fibers in polyester-cotton fabrics are different, there are obvious differences in the dyeing treatment between the two. For this reason, it is necessary to use reactive dyes and disperse dyes to dye the polyester-cotton fabrics respectively.

[0003] Existing fabric dyeing methods include one-bath one-step method, one-bath two-step method and two-bath method, among which the one-bath one-step method refers to putting the garment into a dye solution containing multiple dyes to dye multiple fibers of the garment at the same time; the one-bath two-step method refers to putting the garment into a dye solution containing one type of dye to dye one of the fiber components of the garment, and then putting another type of dye into the dye solution to dissolve it, and then heating it to allow the other type of dye to dye another fiber component of the garment; the two-bath method refers to putting the garment into a dye solution containing one type of dye to dye one of the fiber components of the garment, taking out the garment, and then putting the garment into a dye solution containing another type of dye to dye another fiber component of the garment. Existing polyester-cotton fabrics generally adopt the one-bath two-step method and the two-bath method, which leads to complicated dyeing steps for polyester-cotton fabrics. In addition, due to the different dyeing process temperature conditions of polyester and cotton (polyester dyeing temperature is 120-130℃, cotton dyeing temperature is 60-100℃), the energy consumption of the dyeing process of polyester-cotton fabrics is relatively large. Summary of the invention

[0004] The object of the present invention is to overcome the shortcomings of the prior art and provide a novel polyester-cotton dyeing solution, which comprises a high-temperature reactive dye and a salt-alkali-resistant low-temperature disperse dye, and is added with nano silicon oxide, so that the dyeing solution is suitable for dyeing polyester-cotton fabrics in a one-bath one-step process at a relatively mild dyeing temperature (below 100°C).

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] New polyester-cotton bath dye liquors include:

[0007] High temperature reactive dyes, 10-15 parts;

[0008] Salt-alkali-resistant low-temperature disperse dyes, 10-15 parts;

[0009] Nano silicon oxide, 1 to 5 parts;

[0010] Alkaline agent, 15-20 parts;

[0011] Dyeing accelerator, 50-60 parts;

[0012] The above materials are calculated by weight.

[0013] Compared with the prior art, the novel polyester-cotton one-bath dyeing solution of the present invention has the following beneficial effects:

[0014] (1) By selecting high temperature resistant reactive dyes to overcome the problem that common reactive dyes are easily hydrolyzed under alkaline and high temperature conditions, and selecting salt-alkali resistant low temperature disperse dyes to adapt to the limitations of dyeing temperature, salt and alkali conditions, a one-bath system capable of dyeing polyester-cotton fabrics under heating conditions of 80°C-100°C is formed. Compared with the dye liquor and dyeing conditions used in the existing polyester-cotton one-bath method, the dye liquor of the present invention can dye polyester-cotton fabrics without high temperature reaction (above 100°C), and the two dyes can dye the fabrics under the same temperature range, thereby achieving one-bath dyeing of polyester-cotton two-component fabrics containing polyester and cotton with two different chemical structures and chemical properties at below 100°C, so as to obtain polyester-cotton garment dyeing products with high water color fastness and high light fastness;

[0015] (2) The action mechanism of the novel polyester-cotton dyeing solution of the present invention is as follows: after heating, the polyester-cotton fabric is in a hot-melt state, the polyester fibers in the polyester-cotton fabric swell, the low-temperature disperse dye is dispersed in the aqueous solution and enters the polyester fibers to dye the polyester fibers, and in addition, the high-temperature resistant reactive dye can react with the hydroxyl groups on the cotton fibers under weak alkaline conditions (alkaline agent) to form covalent bonds, thereby achieving dyeing of the cotton fibers;

[0016] (3) The role of adding nano silicon oxide to the dye liquor is, on the one hand, to utilize the large amount of hydroxyl groups on the surface of nano silicon oxide to fully physically adsorb the disperse dye system after dispersion (disperse dyes contain polar groups such as hydroxyl groups and amino groups), so that the nano silicon oxide is completely adsorbed on the disperse dye, and then the three-dimensional network structure of nano silicon oxide exhibits great activity, so that the disperse dye forms a network structure in the process of dyeing polyester with polyester, effectively reducing the dyeing temperature of polyester in polyester-cotton fabric, and enhancing the water washing color fastness and light fastness of the dyed fabric. On the other hand, silicon oxide can reduce the repulsive force between cotton fiber and active dye, so that the cotton fiber surface carries more polar groups, increases the adsorption amount of active dye on the cotton fiber surface, improves the coloring depth of cotton fiber, and cooperates with the dyeing accelerator to improve the coloring efficiency. After the active dye is attached to the cotton fiber, the nano silicon oxide reacts chemically with the cotton fiber to form a film, thereby protecting the active dye and further improving the water washing color fastness and light fastness of the dyeing.

[0017] (4) Nano-scale silicon oxide (ultrafine nano-scale with a size range of 1 to 100 nm) has good optical properties against ultraviolet rays and chemical stability, and can effectively improve the anti-aging, strength and chemical resistance of dyes, while improving the brightness, hue and saturation of dyes, thereby improving the performance of dye liquor, and further improving the color depth of dyes and the fastness of dyed fibers;

[0018] (5) The new polyester-cotton dyeing solution is suitable for the one-bath process with a shorter process, and has the advantages of small restrictions on use, low reaction requirements, stable reaction effect, and less environmental pollution during the reaction process;

[0019] (6) Alkali agents are used as fixing agents. When reactive dyes react with cotton fibers under alkaline conditions, they can promote the formation of cellulose anions on cellulose, undergo nucleophilic substitution and addition reactions with the groups on the reactive dyes, and then form dye-fiber covalent bonds. Dyeing accelerators can increase the dyeing rate of reactive dyes on cotton fibers and accelerate the dyeing rate. At the same time, they can reduce the dye content in the residual liquid, thereby obtaining a cotton fiber product with a higher dyeing depth.

[0020] Furthermore, the high temperature reactive dye is at least one of reactive bright yellow H-E6G, bright yellow H-E4G, yellow H-E4R, reactive orange H-ER, reactive red H-E3G, reactive blue H-EGN, and turquoise blue HA.

[0021] Furthermore, the low-temperature disperse dye is at least one of low-temperature disperse black ECT, disperse yellow ALP, disperse red ALP, disperse orange ALD, disperse ruby ​​ALD and disperse blue ALD.

[0022] Furthermore, the nano silicon oxide is hydrophilic nano silicon dioxide.

[0023] Since nano silicon oxide can improve color fastness and has a color deepening effect, by selecting hydrophilic nano silicon dioxide, the use effect of nano silicon oxide can be maximized. On the one hand, nano silicon oxide has stable chemical properties, abundant free hydroxyl groups on the molecular surface, and a relatively large specific surface area, thereby improving the reaction efficiency. On the other hand, since the present invention uses water as a solvent and needs to be used in an aqueous environment (suitable for dyeing processes carried out in an aqueous environment), hydrophilic nano silicon oxide has a good dispersion effect in water, thereby further promoting the reaction.

[0024] Furthermore, the alkali agent is any one of sodium carbonate, sodium bicarbonate, a substitute alkali and alkali solution.

[0025] Furthermore, the dyeing accelerator is any one of glauber salt and sodium chloride.

[0026] Furthermore, the invention further comprises 1 to 5 parts of a dispersant, wherein the dispersant is one of dispersant NNO, dispersant MF, dispersant CNF and dispersant SS.

[0027] Dispersants can promote the dispersion of disperse dyes, thereby improving dyeing efficiency.

[0028] Further, each material is weighed according to its weight to form a mixture, and the mixture is added to water above 70° C. at a weight percentage of 1:25-35, stirred and mixed evenly, and then a dispersant is added to the water and stirred and mixed evenly to obtain a dye solution.

[0029] The novel polyester-cotton one-bath dyeing solution is formed by putting various materials into water with a temperature above 70° C. so that various materials are dissolved and dispersed in the hot water.

[0030] Another object of the present invention is to provide a polyester-cotton one-bath dyeing process using the novel polyester-cotton one-bath dyeing solution, comprising:

[0031] (1) Add the novel polyester-cotton dye liquor into a water bath;

[0032] (2) Wetting the white polyester-cotton garment and removing excess water, immersing the wetted polyester-cotton garment in a water bath, stirring, heating the water bath to 100° C. and keeping the temperature for 30-70 minutes;

[0033] (3) taking out the polyester-cotton garment and washing off the floating color of the polyester-cotton garment;

[0034] (4) Soak the polyester-cotton garment in the fixing agent solution for 20-30 minutes;

[0035] (5) taking out the polyester-cotton garment, washing off the floating color of the polyester-cotton garment, and obtaining the garment product.

[0036] Compared with the prior art, the polyester-cotton one-bath dyeing process of the present invention has the following beneficial effects:

[0037] (1) The present invention can dye polyester-cotton fabrics with a one-bath method (one-bath-one-step) and a relatively mild dyeing temperature (below 100° C.). Compared with the one-bath-two-step method and the two-bath method, the dyeing process is short and the operation is simple, thereby significantly shortening the dyeing time of polyester-cotton fabrics and significantly reducing the number of times the dye liquor is discharged (energy saving and emission reduction). Compared with the two-bath method, the need for strong alkali reduction cleaning is eliminated, making the dyeing process using the present invention more environmentally friendly;

[0038] (2) The present invention uses a novel polyester-cotton dyeing solution containing nano-silicon oxide to dye polyester-cotton fabrics, so that the produced polyester-cotton fabrics have high water color fastness and high light fastness, as well as good color brightness, hue and saturation;

[0039] (3) The present invention further adds a color fixing process after the polyester-cotton garment is dyed, thereby more effectively improving the color fastness to washing and the color fastness to sunlight of the dyed polyester-cotton fabric.

[0040] Furthermore, in step (2), the heating rate of the water bath is 2-3°C / min.

[0041] By adopting the above-mentioned water temperature heating rate parameters, the solubility of various dye molecules can be increased and the diffusion rate can be optimized, ensuring that various dyes can reach a predetermined penetration depth in the fiber to be adsorbed on the polyester-cotton garment, thereby improving dyeing efficiency, improving product color yield, and improving product color fastness, avoiding various dyes from being adsorbed on the fiber before being evenly diffused in the fiber and causing uneven dyeing. In addition, it can ensure that nano-silicon oxide has sufficient time to play a role in adsorbing dyes, and that nano-silicon oxide is evenly diffused to coat the fiber surface and enter the fiber interior. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the process of polyester-cotton one-bath dyeing. DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present invention in conjunction with the accompanying drawings:

[0044] Embodiment 1

[0045] This embodiment provides a novel polyester-cotton dyeing solution, comprising:

[0046] High temperature reactive dyes, 10-15 parts;

[0047] Salt-alkali-resistant low-temperature disperse dyes, 10-15 parts;

[0048] Nano silicon oxide, 1 to 5 parts;

[0049] Alkaline agent, 15-20 parts;

[0050] Dyeing accelerator, 50-60 parts;

[0051] Dispersant, 1-5 parts;

[0052] The above materials are calculated by weight.

[0053] The high temperature reactive dye is at least one of reactive light yellow H-E6G, light yellow H-E4G, yellow H-E4R, reactive orange H-ER, reactive red H-E3G, reactive blue H-EGN, and turquoise blue HA.

[0054] The low temperature disperse dye is at least one of low temperature disperse black ECT, disperse yellow ALP, disperse red ALP, disperse orange ALD, disperse ruby ​​ALD and disperse blue ALD.

[0055] Nano silicon oxide is hydrophilic nano silicon dioxide.

[0056] Since nano silicon oxide can improve color fastness and has a color deepening effect, by selecting hydrophilic nano silicon dioxide, the use effect of nano silicon oxide can be maximized. On the one hand, nano silicon oxide has stable chemical properties, abundant free hydroxyl groups on the molecular surface, and a relatively large specific surface area, thereby improving the reaction efficiency. On the other hand, since the present invention uses water as a solvent and needs to be used in an aqueous environment (suitable for dyeing processes carried out in an aqueous environment), hydrophilic nano silicon oxide has a good dispersion effect in water, thereby further promoting the reaction.

[0057] The alkali agent is any one of sodium carbonate, sodium bicarbonate, a substitute alkali and alkali solution.

[0058] The dyeing accelerator is any one of sodium sulfate and sodium chloride.

[0059] The dispersant is one of dispersant NNO, dispersant MF, dispersant CNF, and dispersant SS.

[0060] Dispersants can promote the dispersion of disperse dyes, thereby improving dyeing efficiency.

[0061] Weigh each material according to weight to form a mixture, add the mixture to water above 70° C. in a weight percentage of 1:25-35, stir and mix evenly, then add a dispersant into the water and stir and mix evenly to prepare a dye solution.

[0062] The novel polyester-cotton one-bath dyeing solution is formed by putting various materials into water with a temperature above 70° C. so that various materials are dissolved and dispersed in the hot water.

[0063] The pH value of the novel polyester-cotton dyeing solution is 6.5-7.5.

[0064] Compared with the prior art, the novel polyester-cotton one-bath dyeing solution of the present invention has the following beneficial effects:

[0065] (1) By selecting high temperature resistant reactive dyes to overcome the problem that common reactive dyes are easily hydrolyzed under alkaline and high temperature conditions, and selecting salt-alkali resistant low temperature disperse dyes to adapt to the limitations of dyeing temperature, salt and alkali conditions, a one-bath system capable of dyeing polyester-cotton fabrics under heating conditions of 80°C-100°C is formed. Compared with the dye liquor and dyeing conditions used in the existing polyester-cotton one-bath method, the dye liquor of the present invention can dye polyester-cotton fabrics without high temperature reaction (above 100°C), and the two dyes can dye the fabrics under the same temperature range, thereby achieving one-bath dyeing of polyester-cotton two-component fabrics containing polyester and cotton with two different chemical structures and chemical properties at below 100°C, so as to obtain polyester-cotton garment dyeing products with high water color fastness and high light fastness;

[0066] (2) The action mechanism of the novel polyester-cotton dyeing solution of the present invention is as follows: after heating, the polyester-cotton fabric is in a hot-melt state, the polyester fibers in the polyester-cotton fabric swell, the low-temperature disperse dye is dispersed in the aqueous solution and enters the polyester fibers to dye the polyester fibers, and in addition, the high-temperature resistant reactive dye can react with the hydroxyl groups on the cotton fibers under weak alkaline conditions (alkaline agent) to form covalent bonds, thereby achieving dyeing of the cotton fibers;

[0067] (3) The role of adding nano silicon oxide to the dye liquor is, on the one hand, to utilize the large amount of hydroxyl groups on the surface of nano silicon oxide to fully physically adsorb the disperse dye system after dispersion (disperse dyes contain polar groups such as hydroxyl groups and amino groups), so that the nano silicon oxide is completely adsorbed on the disperse dye, and then the three-dimensional network structure of nano silicon oxide exhibits great activity, so that the disperse dye forms a network structure in the process of dyeing polyester with polyester, effectively reducing the dyeing temperature of polyester in polyester-cotton fabric, and enhancing the water washing color fastness and light fastness of the dyed fabric. On the other hand, silicon oxide can reduce the repulsive force between cotton fiber and active dye, so that the cotton fiber surface carries more polar groups, increases the adsorption amount of active dye on the cotton fiber surface, improves the coloring depth of cotton fiber, and cooperates with the dyeing accelerator to improve the coloring efficiency. After the active dye is attached to the cotton fiber, the nano silicon oxide reacts chemically with the cotton fiber to form a film, thereby protecting the active dye and further improving the water washing color fastness and light fastness of the dyeing.

[0068] (4) Nano-scale silicon oxide (ultrafine nano-scale with a size range of 1 to 100 nm) has good optical properties against ultraviolet rays and chemical stability, and can effectively improve the anti-aging, strength and chemical resistance of dyes, while improving the brightness, hue and saturation of dyes, thereby improving the performance of dye liquor, and further improving the color depth of dyes and the fastness of dyed fibers;

[0069] (5) The new polyester-cotton dyeing solution is suitable for the one-bath process with a shorter process, and has the advantages of small restrictions on use, low reaction requirements, stable reaction effect, and less environmental pollution during the reaction process;

[0070] (6) Alkali agents are used as fixing agents. When reactive dyes react with cotton fibers under alkaline conditions, they can promote the formation of cellulose anions on cellulose, undergo nucleophilic substitution and addition reactions with the groups on the reactive dyes, and then form dye-fiber covalent bonds. Dyeing accelerators can increase the dyeing rate of reactive dyes on cotton fibers and accelerate the dyeing rate. At the same time, they can reduce the dye content in the residual liquid, thereby obtaining a cotton fiber product with a higher dyeing depth.

[0071] Embodiment 2

[0072] See also Figure 1 This embodiment provides a polyester-cotton one-bath dyeing process using the novel polyester-cotton one-bath dyeing solution of the first embodiment, comprising:

[0073] (1) Add the novel polyester-cotton dye liquor into a water bath;

[0074] (2) Wetting the white polyester-cotton garment and removing excess water, immersing the wetted polyester-cotton garment in a water bath, stirring, heating the water bath to 100° C. and keeping the temperature for 30-70 minutes;

[0075] (3) taking out the polyester-cotton garment and washing off the floating color of the polyester-cotton garment;

[0076] (4) Soak the polyester-cotton garment in the fixing agent solution for 20-30 minutes;

[0077] (5) taking out the polyester-cotton garment, washing off the floating color of the polyester-cotton garment, and obtaining the garment product.

[0078] Furthermore, in step (2), the heating rate of the water bath is 2-3°C / min.

[0079] By adopting the above-mentioned water temperature heating rate parameters, the solubility of various dye molecules can be increased and the diffusion rate can be optimized, ensuring that various dyes can reach a predetermined penetration depth in the fiber to be adsorbed on the polyester-cotton garment, thereby improving dyeing efficiency, improving product color yield, and improving product color fastness, avoiding various dyes from being adsorbed on the fiber before being evenly diffused in the fiber and causing uneven dyeing. In addition, it can ensure that nano-silicon oxide has sufficient time to play a role in adsorbing dyes, and that nano-silicon oxide is evenly diffused to coat the fiber surface and enter the fiber interior.

[0080] In step (4), the color fixing agent solution is prepared from water and a color fixing agent, wherein the color fixing agent is one of formaldehyde-free color fixing agent RG-906, polyester-cotton color fixing agent RG-H035, and polyester-cotton color fixing agent 624, and the weight ratio of water to color fixing agent is 2000-2500:50-60.

[0081] Compared with the prior art, the polyester-cotton one-bath dyeing process of the present invention has the following beneficial effects:

[0082] (1) The present invention can dye polyester-cotton fabrics with a one-bath method (one-bath-one-step) and a relatively mild dyeing temperature (below 100° C.). Compared with the one-bath-two-step method and the two-bath method, the dyeing process is short and the operation is simple, thereby significantly shortening the dyeing time of polyester-cotton fabrics and significantly reducing the number of times the dye liquor is discharged (energy saving and emission reduction). Compared with the two-bath method, the need for strong alkali reduction cleaning is eliminated, making the dyeing process using the present invention more environmentally friendly;

[0083] (2) The present invention uses a novel polyester-cotton dyeing solution containing nano-silicon oxide to dye polyester-cotton fabrics, so that the produced polyester-cotton fabrics have high water color fastness and high light fastness, as well as good color brightness, hue and saturation;

[0084] (3) The present invention further adds a color fixing process after the polyester-cotton garment is dyed, thereby more effectively improving the color fastness to washing and the color fastness to sunlight of the dyed polyester-cotton fabric.

[0085] The following provides a number of examples to illustrate the effects of the new polyester-cotton dyeing solution of Example 1:

[0086] Example 1

[0087] 8 parts of turquoise blue HA, 8 parts of active yellow H-E4G, 8 parts of disperse blue ALD, 8 parts of disperse yellow ALP, 1-5 parts of hydrophilic nano-silica, 1-5 parts of dispersant, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water.

[0088] Example 2

[0089] Reactive Red H-E3G 4 parts, Light Yellow H-E4G 8 parts, Disperse Red ALP 4 parts, Disperse Yellow ALP 8 parts, Hydrophilic Nano-Silica 1-5 parts, Dispersant 1-5 parts, Sodium Bicarbonate 15-20 parts, Sodium Sulfate 50-60 parts and 3L water.

[0090] Example 3

[0091] Reactive Red H-E3G 12 parts, Light Yellow H-E4G 3 parts, Disperse Red ALP 12 parts, Disperse Yellow ALP 3 parts, Hydrophilic Nano-Silica 1-5 parts, Dispersant 1-5 parts, Sodium Bicarbonate 15-20 parts, Sodium Sulfate 50-60 parts and 3L water.

[0092] Example 4

[0093] Reactive Red H-E3G 10 parts, Disperse Red ALP 10 parts, hydrophilic nano-silica 1-5 parts, dispersant 1-5 parts, sodium bicarbonate 15-20 parts, glauber salt 50-60 parts and 3L water.

[0094] Example 5

[0095] 12 parts of tender yellow H-E4G, 12 parts of disperse yellow ALP, 1-5 parts of hydrophilic nano-silicon dioxide, 1-5 parts of dispersant, 15-20 parts of sodium bicarbonate, 50-60 parts of glauber salt and 3L of water.

[0096] Example 6

[0097] 10 parts of reactive blue H-EGN, 10 parts of disperse blue ALD, 1-5 parts of hydrophilic nano-silica, 1-5 parts of dispersant, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water.

[0098] Comparative Example 1 (without hydrophilic nano-silica)

[0099] 8 parts of turquoise blue HA, 8 parts of active yellow H-E4G, 8 parts of disperse blue ALD, 8 parts of disperse yellow ALP, 1-5 parts of dispersant, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water.

[0100] Comparative Example 2 (without hydrophilic nano-silica)

[0101] Reactive Red H-E3G 4 parts, Light Yellow H-E4G 8 parts, Disperse Red ALP 4 parts, Disperse Yellow ALP 8 parts, Dispersant 1-5 parts, Sodium bicarbonate 15-20 parts, Sodium sulfate 50-60 parts and 3L water.

[0102] Comparative Example 3 (without hydrophilic nano-silica)

[0103] Reactive Red H-E3G 12 parts, Light Yellow H-E4G 3 parts, Disperse Red ALP 12 parts, Disperse Yellow ALP 3 parts, Dispersant 1-5 parts, Sodium bicarbonate 15-20 parts, Sodium sulfate 50-60 parts and 3L water.

[0104] Comparative Example 4 (without hydrophilic nano-silica)

[0105] Reactive Red H-E3G 10 parts, Disperse Red ALP 10 parts, dispersant 1-5 parts, sodium bicarbonate 15-20 parts, glauber salt 50-60 parts and 3L water.

[0106] Comparative Example 5 (without hydrophilic nano-silica)

[0107] 12 parts of light yellow H-E4G, 12 parts of disperse yellow ALP, 1-5 parts of dispersant, 15-20 parts of sodium bicarbonate, 50-60 parts of glauber powder and 3L of water.

[0108] Comparative Example 6 (without hydrophilic nano-silica)

[0109] Reactive blue H-EGN 10 parts, disperse blue ALD 10 parts, dispersant 1-5 parts, sodium bicarbonate 15-20 parts, sodium sulfate 50-60 parts and 3L water.

[0110] Compared with Example 1-6, Control Example 1-6 does not add hydrophilic nano-silica, and other conditions remain unchanged.

[0111] The polyester-cotton garments were dyed using Examples 1-6 and Comparative Examples 1-6, respectively, with the same dyeing process and process parameters.

[0112] The fastness performance test data is carried out according to the following standards: Washing fastness standard: GB / T 8426-1998; Light fastness standard: GB / T 8429-1998, where washing fastness is divided into grades 1-5 and light fastness is divided into grades 1-8.

[0113] Table 1: Test results of color fastness to light and washing1

[0114] Serial number name Light fastness Color fastness to washing 1 Comparative Example 1 Level 3 Level 2 2 Example 1 Level 4.5 Level 3-4 3 Comparative Example 2 Level 3 Level 2-3 4 Example 2 Level 5 Level 3-4 5 Comparative Example 3 Level 2-3 Level 2 6 Example 3 Level 4.5 Level 3-4 7 Comparative Example 4 Level 3 Level 2-3 8 Example 4 Level 5 Level 3-4 9 Comparative Example 5 Level 3 Level 2-3 10 Example 5 Level 5 Level 3-4 11 Comparative Example 6 Level 3 Level 2 12 Example 6 Level 5 Level 3-4

[0115] Conclusion: According to the data in Table 1, the color fastness to sunlight and color fastness to washing of the polyester-cotton fabric of the same specification treated with the novel polyester-cotton one-bath dye solution containing hydrophilic nano-silica of the present invention are significantly improved.

[0116] Comparative Example 01

[0117] Dye solution A is composed of 8 parts of turquoise blue HA, 8 parts of active yellow H-E4G, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water. Dye solution B is composed of 8 parts of disperse blue ALD, 8 parts of disperse yellow ALP and 1-5 parts of dispersant into dye solution A.

[0118] Comparative Example 02

[0119] 4 parts of Reactive Red H-E3G, 8 parts of Light Yellow H-E4G, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water are used to form dye solution A; 4 parts of Disperse Red ALP, 8 parts of Disperse Yellow ALP and 1-5 parts of dispersant are added to dye solution A to form dye solution B.

[0120] Comparative Example 03

[0121] Dye solution A is composed of 12 parts of reactive red H-E3G, 3 parts of light yellow H-E4G, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water; 12 parts of disperse red ALP, 3 parts of disperse yellow ALP and 1-5 parts of dispersant are added to dye solution A to form dye solution B.

[0122] Comparative Example 04

[0123] 10 parts of Reactive Red H-E3G, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water constitute dye solution A; 10 parts of Disperse Red ALP and 1-5 parts of dispersant are added to dye solution A to constitute dye solution B.

[0124] Comparative Example 05

[0125] 12 parts of light yellow H-E4G, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water are used to form dye solution A; 12 parts of disperse yellow ALP and 1-5 parts of dispersant are added to dye solution A to form dye solution B.

[0126] Comparative Example 06

[0127] 10 parts of reactive blue H-EGN, 15-20 parts of sodium bicarbonate, 50-60 parts of sodium sulfate and 3L of water form dye solution A; 10 parts of disperse blue ALD and 1-5 parts of dispersant are added to dye solution A to form dye solution B.

[0128] Comparative Examples 01 to 06 used a one-bath two-step process for fabric dyeing.

[0129] The polyester-cotton bath dyeing process of Comparative Examples 01 to 06 comprises:

[0130] (1) Add dye solution A into the water bath;

[0131] (2) Wetting the white polyester-cotton garment and removing excess water, immersing the wetted polyester-cotton garment in a water bath, stirring, heating the water bath to 80° C. and keeping the temperature for 15-35 minutes;

[0132] (3) Add disperse dye and dispersant to dye solution A to form dye solution B, stir, heat a water bath to 100° C. and keep warm for 15-35 minutes;

[0133] (4) taking out the polyester-cotton garment and washing off the floating color of the polyester-cotton garment;

[0134] (5) Soak the polyester-cotton garment in the fixing agent solution for 20-30 minutes;

[0135] (6) taking out the polyester-cotton garment, washing off the floating color of the polyester-cotton garment, and obtaining the garment product.

[0136] Table 2: Test results of color fastness to sunlight and washing

[0137] Serial number name Light fastness Color fastness to washing 01 Comparative Example 01 Level 4 Level 3 02 Comparative Example 02 Level 4 Level 2-3 03 Comparative Example 03 Level 3-4 Level 3 04 Comparative Example 04 Level 4 Level 2-3 05 Comparative Example 05 Level 4 Level 2-3 06 Comparative Example 06 Level 4 Level 3

[0138] Conclusion: According to the data in Tables 1 and 2, for polyester-cotton fabrics of the same specifications, compared with the existing polyester-cotton fabric dyeing method (one-bath two-step method), the light fastness and water washing fastness of the final product of the polyester-cotton fabric treated with the novel polyester-cotton one-bath dye solution of the present invention are significantly improved, and the trouble of preparing dye solution B is omitted.

[0139] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A new type of polyester-cotton dyeing solution, characterized in that: include: High temperature reactive dyes, 10-15 parts; Salt-alkali-resistant low-temperature disperse dyes, 10-15 parts; Nano silicon oxide, 1 to 5 parts; Alkaline agent, 15-20 parts; Dyeing accelerator, 50-60 parts; The above materials are calculated by weight.

2. The novel polyester-cotton dye liquor according to claim 1, characterized in that: The high temperature reactive dye is at least one of reactive light yellow H-E6G, light yellow H-E4G, yellow H-E4R, reactive orange H-ER, reactive red H-E3G, reactive blue H-EGN, and turquoise blue HA.

3. The novel polyester-cotton dye liquor according to claim 1, characterized in that: The low temperature disperse dye is at least one of low temperature disperse black ECT, disperse yellow ALP, disperse red ALP, disperse orange ALD, disperse ruby ​​ALD and disperse blue ALD.

4. The novel polyester-cotton dye liquor according to claim 1, characterized in that: Nano silicon oxide is hydrophilic nano silicon dioxide.

5. The novel polyester-cotton one-bath dye liquor according to claim 1 is characterized in that: The alkali agent is any one of sodium carbonate, sodium bicarbonate, a substitute alkali and alkali solution.

6. The novel polyester-cotton one-bath dye liquor according to claim 1, characterized in that: The dyeing accelerator is any one of sodium sulfate and sodium chloride.

7. The novel polyester-cotton dye liquor according to claim 1, characterized in that: The invention also includes 1 to 5 parts of a dispersant, which is one of dispersant NNO, dispersant MF, dispersant CNF and dispersant SS.

8. The novel polyester-cotton one-bath dye liquor according to claim 1 is characterized in that: Weigh each material according to weight to form a mixture, add the mixture to water above 70° C. in a weight percentage of 1:25-35, stir and mix evenly, then add a dispersant into the water and stir and mix evenly to prepare a dye solution.

9. A polyester-cotton one-bath dyeing process, characterized in that: include: (1) Add the novel polyester-cotton dye liquor according to any one of claims 1 to 8 into a water bath; (2) Wetting the white polyester-cotton garment and removing excess water, immersing the wetted polyester-cotton garment in a water bath, stirring, heating the water bath to 100° C. and keeping the temperature for 30-70 minutes; (3) taking out the polyester-cotton garment and washing off the floating color of the polyester-cotton garment; (4) Soak the polyester-cotton garment in the fixing agent solution for 20-30 minutes; (5) taking out the polyester-cotton garment, washing off the floating color of the polyester-cotton garment, and obtaining the garment product.

10. The polyester-cotton one-bath dyeing process according to claim 9, characterized in that: In step (2), the heating rate of the water bath is 2-3°C / min.

Images