Dispersion-reduction dyeing and finishing process of polyester-cotton fabric

Abstract

The invention discloses a dispersing, reducing, dyeing and finishing process of polyester-cotton fabric, which is characterized by comprising the following steps: padding in a reducing solution, reducing and steaming, washing with water, padding in an oxidation soaping solution, steaming with oxygen soap, and then sequentially washing with water, drying and cropping. The oxidized soaping liquid comprises the following components: 6-10g / L of hydrogen peroxide and 4-6g / L of soaping agent mj605; the steaming temperature of the oxygen soap is 98-102 DEG C. According to the oxidation soap steaming one-bath process and the preparation method thereof in the dyeing process, the consumption of hydrogen peroxide and soaping agent is reduced by 70% in the dyeing and finishing process, and compared with the previous process, the concentration of the hydrogen peroxide and soaping agent mixed solution in the production process is stable, the flooding phenomenon is basically avoided, reverse staining is not likely to happen, soaping is clean, and the dyeing process is simple. After dyeing, the color fastness index is improved by 0.5-1 level, and the color consistency is relatively good.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing of polyester-cotton fabrics, and in particular to a dispersion reduction dyeing and finishing process of polyester-cotton fabrics. Background Art

[0002] Polyester-cotton fabrics use the traditional disperse / reduced dyeing process: the fabric is dipped in dispersed and reduced dyes and then baked to make the disperse dyes develop color, then dipped in reduced solution, the reduced dye suspension becomes a leuco body, and then dyed on cellulose fibers through steaming, and then washed, oxidized, soaped, washed, neutralized, and dyed. However, this process has the following disadvantages: 1. In the oxidation process with hydrogen peroxide, the consumption of hydrogen peroxide is large, and the concentration of hydrogen peroxide is unstable. Inconsistent oxidation can easily produce color difference before and after. 2. In the soaping process, the consumption of soaping agent is large, the floating color is heavy during the production process, and it is easy to stain back, so the soaping is not clean, resulting in poor soaping fastness. Therefore, whether in terms of production cost or controllability of product quality, it is necessary to find a truly feasible method to seek improvement.

[0003] In view of this, this patent application is filed. Summary of the invention

[0004] The invention provides a dispersion reduction dyeing and finishing process for polyester-cotton fabrics, aiming to solve the technical problems of inconsistent oxidation and unclean soap washing in the dyeing and finishing process of polyester-cotton fabrics. By using the oxidation soap steaming one-bath process, the consumption of hydrogen peroxide and soaping agent is greatly reduced in the dyeing and finishing process, and basically no floating color phenomenon occurs, it is not easy to stain back, and the soap washing is clean, and the color consistency is good.

[0005] The object of the present invention is to provide a dispersion reduction dyeing and finishing process for polyester-cotton fabrics, comprising the following steps: padding with reduction solution, reduction steaming, washing with water, padding with oxidation soaping solution, oxygen soap steaming, and then washing with water, drying, and dropping the fabric in sequence;

[0006] The composition of the oxidizing soaping liquid is: 6-10 g / L hydrogen peroxide, 4-6 g / L soaping agent mj605;

[0007] The temperature of the oxygen soap steaming is 98-102°C.

[0008] In the dyeing and finishing process of polyester-cotton fabrics, the inherent practice for oxidation and soap washing is to directly add hydrogen peroxide concentration if oxidation is insufficient, and add a water washing box to the maximum extent for oxidation; if the soap fastness is poor, the soap detergent will be directly replaced or the water washing will be strengthened, or one soap washing will be added to extend the soap washing and water washing time. This practice requires a large amount of hydrogen peroxide and soap detergent, and the method of adding hydrogen peroxide is manually controlled, which is still easy to cause instability of hydrogen peroxide concentration, and still cannot solve the technical problem of inconsistent oxidation.

[0009] Similarly, for soaping agents, the inventors found that when performing three-grid soap boiling, the color concentration of the soaping liquid in the soap boiling box continued to increase as the amount of dyeing increased, which was the fundamental reason for the final poor color fastness. If the method of replacing the soaping agent or strengthening the water washing and extending the soap and water washing is still adopted, the technical difficulty of poor color fastness cannot be solved.

[0010] In the embodiment of the present invention, the oxidant soap boiling process is innovated, and the oxidation soap steaming one-bath method (dipping and rolling oxidation soaping liquid + oxidation soap steaming) is creatively adopted. The oxidation and soaping process parameters are stable during the dyeing and finishing process, and the consumption of hydrogen peroxide and soaping agent used is reduced by 70% year-on-year compared with that before the innovation. The composition of the oxidation soaping liquid is reasonably designed, and the concentration of the oxidation soaping liquid is stabilized by uniform padding. The oxidation consistency is good, no floating color phenomenon occurs, it is not easy to stain, and it can be soaped cleanly. The color fastness index after dyeing is improved by 0.5-1.0 level, and the color consistency before and after is good.

[0011] The present invention rationally designs the components of the oxidizing soaping solution. The hydrogen peroxide plays the role of an oxidant in reduction dyeing, accelerates the oxidation reaction, and improves the dyeing production efficiency. Since the temperature of the soap steamer is 98-102 DEG C, the hydrogen peroxide will decompose rapidly at 100 DEG C, so the usage of less than 6g / l or more than 10g / l will affect the uniformity and color depth of fabric dyeing.

[0012] A soaping agent dosage of less than 4 g / l will result in incomplete removal of residues, affecting color uniformity and color fastness; a soaping agent dosage of more than 6 g / l will result in over-cleaning, causing the color to become dull.

[0013] The inventors have verified that the temperature of the soap steamer is 98-102°C. Soap steaming in a high temperature environment helps the dye molecules to be better fixed on the fabric, while removing floating colors and excess chemicals to achieve better dyeing effects.

[0014] As a preferred design, the ingredients of the oxidizing soaping liquid are: 8 g / L hydrogen peroxide and 5 g / L soaping agent mj605.

[0015] As a preferred design, during the oxygen soap steaming process, the uniform padding liquid rate of the soap steaming box is 45-50%, and the cloth feeding speed is 60-70 m / min.

[0016] The inventors found through experiments that a liquid carrying rate of less than 45% will result in incomplete removal of residues, affecting color fastness; if it is higher than 50%, excessive working liquid will be wasted. If the vehicle speed is lower than 65m / min, the soap steaming time will be longer, cleaning will be excessive, and the color will be greatly affected; if it is higher than 70m / min, the soap steaming time will be shorter, cleaning will be insufficient, affecting color fastness.

[0017] As a preferred design, the uniform padding liquid rate at the cloth inlet of the soap steam box is 45%, the uniform padding liquid rate at the cloth outlet is 45%, and the cloth feeding speed is 65 m / min.

[0018] As a preferred design, padding the dye solution, pre-baking and baking are performed before padding the reducing solution;

[0019] The liquid carrying rate during the padding dyeing solution is 40-45%.

[0020] As a preferred design, the temperatures of the three air chambers for pre-baking and drying are 1# (100°C), 2# (140°C), and 3# (170°C); the temperature for high-temperature baking is 210°C.

[0021] As a preferred design, the dye components used in the padding dye solution are:

[0022] Disperse dark blue HGL 36g / L, disperse yellow brown S-2RFL 13.2g / L, disperse ruby ​​S-2GEL 2.3g / L, reduced dark blue VB22g / L, reduced olive T13.5g / L, reduced red 6B 1.7g / L, anti-migration agent ST-200A 5g / L, reducing liquid: caustic soda 30g / L, hydrosulfite 35g / L;

[0023] Or: Disperse black ECT47g / l, disperse yellow brown S-2RFL 3.2g / l, disperse red ruby ​​S-2GEL 0.3g / l, reduced gray M32g / l, reduced olive T 5g / l, reduced red 6B 0.1g / l, anti-migration agent ST-200A 5g / l, reducing liquid: caustic soda 35g / l, hydrosulfite 40g / l;

[0024] Or: Disperse Blue 2BF 30g / l, Disperse Gold SE-4RL 0.3g / l, Disperse Red 3B 2.7g / l, Vat Blue RSN 22.3g / l, Vat Olive T 0.1g / l, Vat Red 6B 1.2g / l, Anti-migration Agent ST-200A 5g / l, Reducing Liquid: Caustic Soda 30g / l, Hydrosulfite 35g / l.

[0025] As a preferred design, the temperature during the reduction steaming is 100-102°C.

[0026] As a preferred design, a four-compartment water tank is used for water washing after reduction steaming, and a six-compartment water tank is used for water washing after oxygen soap steaming.

[0027] As a preferred design, the water washing after reduction steaming is carried out at room temperature. In the six-grid water tank used for water washing after oxygen soap steaming, the water washing temperature of the first three water tanks is 80-90°C, the water washing temperature of the fourth to sixth water tanks is all at room temperature, and neutralization water washing is carried out in the fifth water tank.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] 1. The present invention reduces the consumption of hydrogen peroxide and soap detergent by 70% in the dyeing and finishing process through the oxidized soap steaming-bath process and the preparation method thereof. Compared with the previous process, the concentration of the hydrogen peroxide soap detergent mixed solution is stable during the production process, and basically no floating color phenomenon occurs. It is not easy to stain back and the soap is clean. The color fastness index after dyeing is improved by 0.5-1 level, and the color consistency is good.

[0030] 2. The present invention effectively reduces labor intensity, and the product quality is stable and controllable, which greatly reduces many man-made and uncontrollable factors in the production process, reduces the time for analyzing and troubleshooting key factors due to quality problems in production, and improves product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0032] Figure 1 It is a comparison chart of the washing fastness of each embodiment and the comparative example.

[0033] Figure 2 It is a comparison chart of the friction fastness of each embodiment and the comparative example.

[0034] Figure 3 It is a comparison chart of the water-scalding color fastness of each embodiment and the corresponding comparative example.

[0035] Figure 4 The following is a color consistency comparison chart of each embodiment and the corresponding comparative example before and after. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments. The illustrative embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0037] Example 1

[0038] A disperse reduction dyeing and finishing process for polyester-cotton fabric comprises the following steps:

[0039] (1) Equipment design: After reduction steaming, 1#-4# water tanks are washed with water at room temperature. 5#-6# use small steam boxes as modified oxygen soap steam boxes. The steam box temperature is 100°C, and the cloth inlet of the oxygen soap steam box is equipped with a liquid tank and a uniform padding liquid rate of 45%. The cloth outlet of the steam box is equipped with a normal temperature water washing tank, a normal temperature spray port and a uniform padding liquid rate of 45%. High temperature water washing is carried out in 7#, 8# and 9# water tanks, and the washing temperature is 90°C; 10# water tank is washed with water at room temperature, 11# water tank is washed with neutralization water at room temperature, and 12# water tank is washed with water at room temperature.

[0040] (2) Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 8 g / L hydrogen peroxide and 5 g / L soaping agent MJ605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 100°C, and adjust the steamer cloth feeding speed to 65 m / min.

[0041] (3) Dyeing: After step (2) is completed, the specification is: T65 / C35 14*12 82*48*63.5 2 / 1 left oblique large chemical fiber polyester-cotton semi-finished product, dyes: disperse dark blue HGL 36g / L, disperse yellow brown S-2RFL 13.2g / L, disperse red jade S-2GEL 2.3g / L, reduced dark blue VB 22g / L, reduced olive T13.5g / L, reduced red 6B 1.7g / L, anti-migration agent ST-200A 5g / L, reducing liquid: caustic soda 30g / L, hydrosulfite 35g / L as the basis, padding the dyeing liquid at room temperature, with a liquid rate of 45%; then pre-drying and hot air drying in sequence, the temperatures of the three air chambers during hot air drying are 1# (100℃), 2# (140℃), and 3# (170℃); high temperature baking temperature is 210℃, cold water rolling, padding reducing liquid;

[0042] Then, the fabric is reduced and steamed at 100°C, sprayed, washed with three grids at room temperature, squeezed, and immersed in an oxidative soaping agent mixture (the process is as follows: the polyester-cotton fabric is squeezed by a squeezing machine and then enters a squeezing tank through a cloth guide roller to immerse in the oxidative soaping mixture, and then immediately passes through a uniform squeezing machine with a liquid carrying rate of 45% and enters a soap steaming box), oxygen soap steaming is performed at 100°C (oxygen soap steaming is performed according to the preparatory work in step 2), and then washed (high-temperature washing is performed in 7#, 8#, and 9# water tanks, and the washing temperature is 90°C; washing is performed at room temperature in 10# water tank), neutralized washing (neutralized washing at room temperature in 11# water tank, and washing at room temperature in 12# water tank), dried, and dropped.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that the dyes used in padding the dyeing solution in step (3) of this embodiment are different, and other conditions remain unchanged. The specific dyes used are as follows:

[0045] Dyes: Disperse black ECT47g / l, Disperse yellow brown S-2RFL 3.2g / l, Disperse ruby ​​S-2GEL 0.3g / l, Vat gray M32g / l, Vat olive T 5g / l, Vat red 6B 0.1g / l, anti-migration agent ST-200A 5g / l, reducing liquid: caustic soda 35g / l, hydrosulfite 40g / l.

[0046] Example 3

[0047] The difference between this embodiment and embodiment 1 is that the dye used in padding the dye solution in step (3) of this embodiment is different, and other conditions remain unchanged, and the specific settings are as follows:

[0048] Dyes: Disperse Blue 2BF 30g / l, Disperse Gold SE-4RL 0.3g / l, Disperse Red 3B 2.7g / l, Vat Blue RSN 22.3g / l, Vat Olive T 0.1g / l, Vat Red 6B 1.2g / l, Anti-migration Agent ST-200A 5g / l, Reducing Solution: Caustic Soda 30g / l, Hydrosulfite 35g / l.

[0049] Comparative Example 1:

[0050] The existing conventional disperse reduction dyeing and finishing process includes the following steps:

[0051] (1) Equipment: After reducing steam, 1#-2# water tanks are washed with water at room temperature; 3#-4# water tanks are oxidized with hydrogen peroxide 8g / l; 5#-7# three-grid water tanks are soaped at 90℃, with soaping agent mj605 4g / l; 9# water tank is washed with water at room temperature; 10# water tank is washed with neutralization water at room temperature; 11# water tank is washed with water at room temperature, and 12# water tank is washed with water at room temperature.

[0052] (2) Preparation: In step (1), prepare for changing water and materials. First, drain the oxidation tank and prepare the liquid, hydrogen peroxide 8g / l, then change the water in the three-grid soap tank to prepare the soap liquid, soap agent mj605 5g / l, and then change the water in the latter stage.

[0053] (3) Dyeing: After step (2) is completed, the specification is: T65 / C35 14*12 82*48*63.5 2 / 1 left oblique large chemical fiber polyester-cotton semi-finished product, dyes: disperse dark blue HGL 36g / l, disperse yellow brown S-2RFL 13.2g / l, disperse red jade S-2GEL 2.3g / l, reduced dark blue VB 22g / l, reduced olive T13.5g / l, reduced red 6B 1.7g / l, anti-migration agent ST-200A 5g / l, reducing liquid: caustic soda 30g / l, insurance powder 35g / l as the basis, padding dye liquor at room temperature, liquid rate 40-45%, and then pre-drying and hot air drying in sequence, the temperatures of the three wind chambers during hot air drying are 1# (100℃), 2# (140℃), 3# (170℃); high temperature baking temperature is 210℃, cold water roll, padding reducing liquid, at 100℃ temperature, reduction steaming, squeezing, oxidation, soap boiling, then washing, neutralization washing, drying, and cloth dropping.

[0054] Comparative Example 2:

[0055] The difference between this comparative example and comparative example 1 is that the dye used in step (3) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0056] Dyes: Disperse black ECT47g / l, Disperse yellow brown S-2RFL 3.2g / l, Disperse ruby ​​S-2GEL 0.3g / l, Vat gray M32g / l, Vat olive T 5g / l, Vat red 6B 0.1g / l, anti-migration agent ST-200A 5g / l, reducing liquid: caustic soda 35g / l, hydrosulfite 40g / l.

[0057] Comparative Example 3:

[0058] The difference between this comparative example and comparative example 1 is that the dye used in step (3) of this comparative example is different, and other conditions remain unchanged. The specific settings are as follows:

[0059] Dye: Disperse Blue 2BF 30g / l, Disperse Golden Yellow SE-4RL 0.3g / l, Disperse Red 3B 2.7g / l, Vat Blue RSN 22.3g / l, Vat Olive T 0.1g / l, Vat Red 6B 1.2g / l, Anti-migration Agent ST-200A 5g / l, Reducing Liquid: Caustic Soda 30g / l, Hydrosulfite 35g / l Comparative Example 4:

[0060] The difference between this comparative example and Example 1 is that the concentration of hydrogen peroxide in the oxidizing soaping agent mixed solution used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0061] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 5g / L hydrogen peroxide and 5g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 100°C, and adjust the steamer cloth feeding speed to 65m / min.

[0062] Comparative Example 5:

[0063] The difference between this comparative example and Example 1 is that the concentration of hydrogen peroxide in the oxidizing soaping agent mixed solution used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0064] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 11g / L hydrogen peroxide and 5g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 100°C, and adjust the steamer cloth feeding speed to 65m / min.

[0065] Comparative Example 6:

[0066] The difference between this comparative example and Example 1 is that the concentration of soaping agent MJ605 in the oxidizing soaping agent mixed solution used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0067] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 8g / L hydrogen peroxide and 3g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 100°C, and adjust the steamer cloth feeding speed to 65m / min.

[0068] Comparative Example 7:

[0069] The difference between this comparative example and Example 1 is that the concentration of soaping agent MJ605 in the oxidizing soaping agent mixed solution used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0070] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 8g / L hydrogen peroxide and 7g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 100°C, and adjust the steamer cloth feeding speed to 65m / min.

[0071] Comparative Example 8:

[0072] The difference between this comparative example and Example 1 is that the temperature of the soap steamer used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0073] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 8g / L hydrogen peroxide and 5g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 90°C, and adjust the steamer cloth feeding speed to 65m / min.

[0074] Comparative Example 9:

[0075] The difference between this comparative example and Example 1 is that the temperature of the soap steamer used in step (2) of this comparative example is different, and other conditions remain unchanged, and the specific settings are as follows:

[0076] Preparation: The modified oxygen soap steamer in step (1) is prepared for soap steaming. First, prepare an oxidizing soaping agent mixture, the components of which are 8g / L hydrogen peroxide and 5g / L soaping agent mj605. Adjust the padding pressure to 45%, adjust the soap steamer temperature to 110°C, and adjust the steamer cloth feeding speed to 65m / min.

[0077] The color samples obtained by the oxidized soap steaming-bath process of Example 1, Example 2 and Example 3 were measured. The standards used and the test results of comparative examples 1 to 9 are shown in Table 1, Table 2, Table 3, Table 4, Table 5 and Table 6. Figure 1 , 2 , 3, and 4 respectively give the washing fastness (polyester-cotton multi-fiber staining), rubbing fastness (wet and dry rubbing), ironing color fastness, and color consistency comparison sample diagrams of each embodiment and comparative example.

[0078] Table 1 shows the test standards and comparative test results of the fabrics obtained in Example 1 and Comparative Example 1.

[0079] Table 1

[0080]

[0081] From Table 1 and combined Figure 1 , 2 3 It can be seen that the color fastness of the color sample obtained by the oxidation soap steaming one-bath process in Example 1 is significantly improved by 0.5 to 1.0 level compared with the comparative example 1, and no floating color is produced. Figure 4 It can be seen that the color consistency of Example 1 is better than that of Comparative Example 1.

[0082] Table 2 shows the test standards and comparative test results of the fabrics obtained in Example 2 and Comparative Example 2.

[0083] Table 2

[0084]

[0085]

[0086] From Table 2 and combined Figure 1 , 2 3. It can be seen that the color fastness of the color sample obtained by the oxidation soap steaming-bath process in Example 2 is significantly improved compared with that in Comparative Example 2, and no floating color occurs. Figure 4 It can be seen that the color consistency of Example 2 is better than that of Comparative Example 2.

[0087] Table 3 shows the test standards and comparative test results of the fabrics obtained in Example 3 and Comparative Example 3.

[0088] Table 3

[0089]

[0090] From Table 3 and combined Figure 1 , 2 3 It can be seen that the color fastness of the color sample obtained by the oxidation soap steaming-bath process in Example 3 is significantly improved compared with that in Comparative Example 3, and no floating color occurs. Figure 4 It can be seen that the color consistency of Example 3 is better than that of Comparative Example 3.

[0091] Table 4 shows the test standards and comparative test results of the fabrics obtained in Example 1, Comparative Example 4 and Comparative Example 5.

[0092] Table 4

[0093]

[0094] From Table 4 and combined Figure 1 , 2 It can be seen that the color sample obtained by the oxidized soap steaming-bath process in Example 1 has better color fastness indicators than those in Comparative Examples 4 and 5.

[0095] Table 5 shows the test standards and comparative test results of the fabrics obtained in Example 1, Comparative Example 6 and Comparative Example 7.

[0096] Table 5

[0097]

[0098]

[0099] From Table 5 and combined Figure 1 , 2 It can be seen that the color sample obtained by the oxidized soap steaming-bath process in Example 1 has better color fastness indicators than those in Comparative Examples 6 and 7.

[0100] Table 6 shows the test standards and comparative test results of the fabrics obtained in Example 1, Comparative Examples 8 and 9.

[0101] Table 6

[0102]

[0103] From Table 6 and combined Figure 1 , 2 It can be seen that the color sample obtained by the oxidized soap steaming-bath process in Example 1 has better color fastness indicators than those in Comparative Examples 8 and 9.

[0104] In the embodiment of the present invention, through the oxidation soap steaming one-bath process in the dyeing process, after the dyeing is reduced and steamed, the undyed and unfixed dyes, hydrolyzed dyes, alkali agents and other chemical substances in the dye liquor are stripped off at a high temperature of 98-102° C. in a soap steaming box by padding soaping agent MJ-605: 4-6 g / l; so as to achieve the purpose of improving the color brightness, color fastness and cleanliness of the fabric; and then the impurities are removed by multiple high-temperature water washing at 80-90° C. and normal-temperature water washing to ensure the dyeing quality.

[0105] Compared with the previous process flow, the process of the present invention has a stable concentration of the hydrogen peroxide soap detergent mixed solution during the production process, basically no floating color phenomenon occurs, it is not easy to stain back and the soap is clean, the color fastness index after dyeing is improved by 0.5-1 level, and the color consistency before and after is good.

[0106] The process of the present invention reduces the consumption of hydrogen peroxide and soaping agent by 70% during the dyeing and finishing process. There is no need to add or extend the oxidation or soaping and washing time during the dyeing and finishing process, so that the labor intensity can be effectively reduced, the product quality is stable and controllable, and many human uncontrollable factors in the production process are greatly reduced. The time for analyzing and checking key factors due to quality problems in production is reduced, and the product production efficiency is improved.

[0107] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A disperse reduction dyeing and finishing process for polyester-cotton fabric, characterized in that: The following steps are involved: After padding with reducing liquid, reducing steam, and washing with water, padding with oxidizing soap washing liquid, oxygen soap steaming, and then washing with water, drying, and dropping the cloth in sequence; The composition of the oxidizing soaping liquid is: 6-10 g / L hydrogen peroxide, 4-6 g / L soaping agent mj605; The temperature of the oxygen soap steaming is 98-102°C.

2. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 1, characterized in that: The ingredients of the oxidizing soaping liquid are: 8g / L hydrogen peroxide and 5g / L soaping agent mj605.

3. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 1, characterized in that: During the oxygen soap steaming process, the uniform padding liquid rate of the soap steaming box is 45-50%, and the cloth feeding speed is 60-70 m / min.

4. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 3, characterized in that: The uniform padding liquid rate at the cloth inlet of the soap steam box is 45%, and the cloth feeding speed is 65m / min.

5. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 1, characterized in that: Before padding the reducing solution, padding the dye solution, pre-drying and baking are also carried out; The liquid carrying rate during the padding dyeing solution is 40-45%.

6. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 5, characterized in that: The temperatures of the three air chambers for pre-drying are 100°C, 140°C, and 170°C respectively, and the temperature for high-temperature baking is 210°C.

7. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 5, characterized in that: When padding the dye solution, the dye components used are: Disperse dark blue HGL 36g / L, disperse yellow brown S-2RFL 13.2g / L, disperse ruby ​​S-2GEL 2.3g / L, reduced dark blue VB22g / L, reduced olive T13.5g / L, reduced red 6B 1.7g / L, anti-migration agent ST-200A 5g / L, reducing liquid: caustic soda 30g / L, hydrosulfite 35g / L; Or: Disperse black ECT47g / l, disperse yellow brown S-2RFL 3.2g / l, disperse red ruby ​​S-2GEL 0.3g / l, reduced gray M32g / l, reduced olive T 5g / l, reduced red 6B 0.1g / l, anti-migration agent ST-200A5g / l, reducing liquid: caustic soda 35g / l, hydrosulfite 40g / l; Or: Disperse Blue 2BF 30g / l, Disperse Gold SE-4RL 0.3g / l, Disperse Red 3B2.7g / l, Vat Blue RSN22.3g / l, Vat Olive T 0.1g / l, Vat Red 6B 1.2g / l, Anti-migration Agent ST-200A 5g / l, Reducing Liquid: Caustic Soda 30g / l, Hydrosulfite 35g / l.

8. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 1, characterized in that: The temperature during the reduction steaming is 100-102°C.

9. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 1, characterized in that: A four-compartment water tank is used for water washing after reduction steaming, and a six-compartment water tank is used for water washing after oxygen soap steaming.

10. The disperse reduction dyeing and finishing process for polyester-cotton fabric according to claim 9, characterized in that: The water washing after reduction steaming is carried out at room temperature. In the six-grid water tank used for water washing after oxygen soap steaming, the water washing temperature of the first three water tanks is 80-90℃, the water washing temperature of the fourth to sixth water tanks is all at room temperature, and neutralization water washing is carried out in the fifth water tank.

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