Liquid spraying and dyeing device and liquid spraying and dyeing process

Abstract

The invention relates to a liquid spraying and dyeing device and a liquid spraying and dyeing process. The liquid spraying and dyeing device comprises at least one group of liquid spraying parts, wherein each liquid spraying part comprises a spraying head, a protective cover and a needle plate; wherein the spray head is selected from an electromagnetic valve spray head and / or a pneumatic atomization spray head; the spray head is arranged at the top end in the protective cover; the protective cover is arranged outside the spray head in a covering manner; and the needle plate is positioned below the opening at the bottom end of the protective cover. The invention further provides a liquid spraying and dyeing process which is carried out by adopting the liquid spraying and dyeing device. According to the technical scheme, the amount of the dye liquor applied to the fabric can be accurately controlled, the liquor carrying rate is reduced, left-right forward and reverse spraying is uniform after the cloth cover is sprayed, and the fabric can be subjected to color fixing treatment after spraying. The color of the cloth cover does not have head-tail or left-middle-right color difference, the dye liquor permeability is excellent, and the dye utilization rate after color fixation is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textile dyeing, and relates to a liquid spraying dyeing device and a liquid spraying dyeing process. BACKGROUND

[0002] Printing and dyeing is an important process in textile fabric processing. The traditional dip dyeing processing mode has problems such as low utilization rate of dyeing dyes, long process flow, and a large amount of unused dyes and inorganic salts in dyeing residual liquid, and a large amount of washing is required to clean the unreacted dyes.

[0003] The traditional continuous cold pad dyeing process of reactive dyes is as follows: using an even padder to dip and roll the dyeing liquid (the fabric liquid rate is 80%-100%, and the dye concentration depends on the dyeing depth of the fabric, and the alkali agent for fixing the dye is contained in the dye), then rolling and stacking at room temperature for 24 hours, and finally washing and drying.

[0004] Compared with the traditional dip dyeing, the continuous cold pad dyeing method has less wastewater discharge, but because the fabric has different adsorption rates for different dyeing liquids during dyeing, the dyeing liquid concentration of the dyeing tank changes constantly, and the fabric produced by this processing method often has large head-tail and left-right color differences. Moreover, the padder cold pad dyeing method often has a high liquid rate (the liquid amount of knitted fabric is about 80-100%) and cannot be reduced, and the large amount of excess free water on the fabric surface will cause dye hydrolysis and reduce the utilization rate of dyes.

[0005] In order to solve the problem of fabric head-tail and left-right color difference caused by the change of dyeing liquid in the dyeing tank during cold pad dyeing processing, the current main method is to add dyes online according to personal experience. This method has too many human factors and is not accurate enough, and can only slow down the color difference and cannot completely solve the corresponding problem.

[0006] Therefore, one of the technical problems to be solved in the field is to research a process that can accurately and quantitatively apply dyeing liquid and auxiliaries. SUMMARY

[0007] To solve the above technical problems, the purpose of the present application is to provide a liquid spraying dyeing device and a liquid spraying dyeing process, which can realize uniform dyeing of fabric and avoid color difference.

[0008] To achieve the above purpose, the present application provides a liquid spraying dyeing device, which comprises at least one set of liquid spraying part, the liquid spraying part comprises a spray head, a protective cover and a needle plate.

[0009] The spray head is selected from an electromagnetic valve spray head and / or a pneumatic atomizing spray head.

[0010] The spray head is arranged at the inner top end of the protective cover.

[0011] The protective cover is arranged outside the nozzle.

[0012] The needle plate is located below the bottom opening of the protective cover.

[0013] In the above-mentioned liquid jet dyeing device, the protective cover is used to control the movement trajectory of the jet droplets, and the jet droplets present a state of being more concentrated in the middle and more divergent at the edge when jetted from the nozzle, and the overall jet cross section is circular or elliptical. By arranging the protective cover, the divergent jet droplet movement trajectory is blocked by the protective cover, thereby avoiding the direct mutual influence of different nozzles, so that the jet droplets can only be jetted in a fixed shape (such as a rectangle or a square) from the bottom end of the protective cover under the control of the protective cover, forming a corresponding shape of the dyeing area on the cloth. Preferably, the protective cover is a cuboid (including a square), and the size of the bottom opening of the protective cover is (12-15) cm x (12-15) cm.

[0014] In the above-mentioned liquid jet dyeing device, preferably, one nozzle is arranged in one liquid jet part.

[0015] In the above-mentioned liquid jet dyeing device, preferably, the vertical distance between the nozzle and the bottom opening of the protective cover is 20-25 cm.

[0016] In the above-mentioned liquid jet dyeing device, preferably, a liquid jet baffle recovery groove is arranged on the inside of the bottom opening of the protective cover, and the liquid jet baffle recovery groove is inclined upward. The liquid jet baffle recovery groove is used to collect the ink droplets in the divergent state to avoid the divergent ink droplets from flowing to the cloth along the protective cover wall after gathering. Preferably, the angle of the upward inclination of the liquid jet baffle recovery groove is 15°-30°. Preferably, the edge width of the liquid jet baffle recovery groove is 1-2 cm.

[0017] In the above-mentioned liquid jet dyeing device, preferably, the distance between the bottom opening of the protective cover and the needle plate is 1-5 mm. If the distance is less than 1 mm, the cloth hair is easy to directly contact the nozzle and has a certain friction risk. If the distance is more than 5 mm, the jet droplets are easy to be affected by the air after leaving the protective cover and change the trajectory, affecting the jet uniformity.

[0018] In the above-mentioned liquid jet dyeing device, the needle plate can partially penetrate the fabric to make the fabric structure more loose, which is beneficial to the diffusion of the dye jetted to the cloth to the back of the fabric. Preferably, the needle plate is provided with a needle-shaped structure with a height of 2-4 mm and a spacing of 1-2 mm.

[0019] In the liquid jet dyeing device, preferably, the liquid jet dyeing device comprises at least two rows of spaced-apart liquid jet portions. The at least two rows of spaced-apart liquid jet portions refer to that at least two rows of liquid jet portions are arranged along the running direction of the fabric, and two adjacent liquid jet portions in front and back are staggered with each other and are not aligned along the running direction of the fabric. When one row of liquid jet portions is used, if the spacing is too far, the junction of the dyeing areas corresponding to the left and right adjacent liquid jet portions may not be seamlessly spliced. By arranging the staggered liquid jet portions in front and back, the perfect splicing can be achieved. The joint of the conical jet trajectory of the conventional single-row arrangement of ordinary electromagnetic valves or pneumatic nozzles is prone to ink droplet overlap, thereby causing uneven color on the fabric. By using the at least two groups of spaced-apart arrangement, the above problems can be avoided, and the color of the dyed fabric is uniform, and there is no color difference in the head-tail, left-right and other directions.

[0020] In the liquid jet dyeing device, preferably, the transverse spacing (i.e. the spacing along the transverse direction of the fabric) between adjacent liquid jet portions is 10-20 cm, calculated based on the distance between the centers of the nozzles, more preferably 11-17 cm, and further preferably 11.5-15.5 cm.

[0021] In the liquid jet dyeing device, preferably, the longitudinal spacing (i.e. the spacing along the longitudinal direction or running direction of the fabric) between the two adjacent rows of liquid jet portions is 0.5-1 cm, calculated based on the distance of the opening edges of the bottom surfaces of the protective covers.

[0022] The application also provides a liquid jet dyeing process, which is carried out by using the liquid jet dyeing device.

[0023] According to a specific embodiment of the application, preferably, the liquid jet dyeing process comprises:

[0024] placing the fabric subjected to the graft modification treatment on the surface of the needle plate;

[0025] injecting the dyeing liquid to the surface of the fabric by using the nozzles to perform dyeing;

[0026] performing cold piling, washing and drying on the dyed fabric to complete the liquid jet dyeing process.

[0027] In the liquid jet dyeing process, preferably, the graft modification treatment agent used in the graft modification treatment is selected from one or a combination of two or more of a polyamine polymer, an amide polymer, an epoxy compound, a quaternary ammonium salt compound, a cationic propylene copolymer, a natural cationic modifier and a polymeric cationic compound; more preferably, the polyamine polymer comprises an azepine cationic compound; the amide polymer comprises a polyamide resin; and the quaternary ammonium salt compound comprises a s-triazine-based quaternary ammonium salt compound.

[0028] In the above liquid jet dyeing process, preferably, the graft modification treatment is performed by applying a graft modification treatment liquid.

[0029] The concentration of the graft modification treatment auxiliary is 30-70 g / L, based on the volume of the graft modification treatment liquid. The solvent of the graft modification treatment liquid can be water.

[0030] In the above liquid jet dyeing process, preferably, the liquid retention rate of the graft modification treatment is 80-100%.

[0031] In the above liquid jet dyeing process, preferably, the temperature of the graft modification treatment is 25-30℃.

[0032] In the above liquid jet dyeing process, preferably, the graft modification treatment is performed by applying a graft modification treatment liquid.

[0033] In the above liquid jet dyeing process, preferably, the liquid jet dyeing process further comprises a step of performing a hydrophilicity improvement treatment on the fabric subjected to the graft modification treatment.

[0034] In the above liquid jet dyeing process, preferably, the hydrophilicity improvement treatment uses a treatment agent containing an alkali agent 2-4 g / L and a penetrating agent 1-4 g / L. More preferably, the alkali agent is selected from one or more than two combinations of soda ash, 50% liquid alkali (NaOH), and baking soda, and the penetrating agent is selected from one or more than two combinations of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and sodium alkyl benzene sulfonate.

[0035] In the above liquid jet dyeing process, preferably, the hydrophilicity improvement treatment has a treatment temperature of 60-90℃, a treatment time of 30-60 min, and a treatment bath ratio of 1:5-20.

[0036] In the above liquid jet dyeing process, preferably, the hydrophilicity improvement treatment has a hydrophilicity treatment requirement of a water drop spreading time of less than or equal to 3 s.

[0037] By performing graft modification and hydrophilicity treatment on the fabric and controlling the hydrophilicity treatment requirement, the permeability of the fabric can be ensured.

[0038] In the above liquid jet dyeing process, preferably, the composition of the dyeing liquid contains reactive dyes 0.1-100 g / L, fixing alkali agent 1-30 g / L, and penetrating agent 1-10 g / L.

[0039] In the above liquid jet dyeing process, preferably, the fixing alkali agent is selected from carbonates and / or hydroxides.

[0040] In the above liquid jet dyeing process, preferably, the dyeing is performed by single-sided jet dyeing.

[0041] In the above-mentioned jet dyeing process, preferably, the liquid carrying rate of the dyeing is 30%-60%. Controlling the liquid carrying rate within the range of 30-60% can ensure that the fabric is fully penetrated, avoid the phenomenon of white core due to incomplete dyeing of the fabric, and at the same time avoid the existence of excessive moisture, which leads to dye hydrolysis and reduces the utilization rate of the dye.

[0042] In the above-mentioned jet dyeing process, preferably, the liquid carrying rate of the dyeing is 30%-60%. Controlling the liquid carrying rate within the range of 30-60% can ensure that the fabric is fully penetrated, avoid the phenomenon of white core due to incomplete dyeing of the fabric, and at the same time avoid the existence of excessive moisture, which leads to dye hydrolysis and reduces the utilization rate of the dye.

[0043] In the above-mentioned jet dyeing process, preferably, the total flow rate = fabric weight x fabric width x speed x liquid carrying rate x 6%, unit: L / h. The total flow rate refers to the total flow rate of the dyeing liquid sprayed by all the nozzles.

[0044] In the above-mentioned jet dyeing process, preferably, during the dyeing process of the jet dyeing liquid, the jet dyeing device is fixed and the fabric is running, and the lowest position of the jet dyeing device (i.e. the lower edge position of the lower end opening of the protective cover) is 1-5mm away from the fabric height.

[0045] In the above-mentioned jet dyeing process, preferably, the temperature of the cold piling fixation is 25-30℃, and the piling time is 12-24h.

[0046] In the above-mentioned jet dyeing process, after cold piling fixation, the alkali agent on the fabric surface can be washed with water, without the need for soaping. Preferably, the water washing is carried out in a continuous water washing manner, the water washing temperature is 60-90℃, and the water washing speed is 20-70m / min.

[0047] The technical scheme of the present application can accurately control the amount of dyeing liquid applied to the fabric, realize the reduction of the liquid carrying rate to 30%-60%, the uniformity of the left and right spraying of the fabric surface after spraying, and the fixation treatment of the fabric after spraying. The color of the fabric surface does not exist head and tail or left and right color difference, the dyeing liquid has excellent permeability, and the utilization rate of the dye after fixation reaches 99%.

[0048] The technical advantages of the present application are as follows:

[0049] (1) In the continuous dyeing process of textiles, the dye liquor is applied to the fabric by padding, which is a common technical means in the printing and dyeing industry. The present application uses electromagnetic valve nozzles or pneumatic atomizing nozzles with protective covers to spray the dye liquor on the front of the fabric instead of the traditional padder. The movement trajectory of the spray droplets can be controlled, and the shape formed by the droplets when they reach the fabric surface is a square. Further, by using a double-row spaced arrangement, the shape of the dye liquor can be better seamlessly spliced, avoiding the problem of overlapping of the joint between the circular columnar spray trajectories of multiple ordinary electromagnetic valve nozzles or pneumatic nozzles, which causes unevenness on the fabric surface. There is no color difference problem between the head and tail, left and right, and the fabric can be quantitatively fed. This method does not require the fabric to be immersed in the dye liquor first, the process is simpler, the liquid feed amount of the nozzle can be quantitatively controlled, the head and tail color difference is avoided from the source, and the fixation rate of reactive dyes can reach 99%. After dyeing, only washing is required, and no soaping is needed.

[0050] (2) By controlling the speed, flow rate, and liquid carrying rate, and fixing the fabric on the needle plate for spraying, the dye liquor penetration effect can be efficiently and accurately achieved, the dye liquor can be expanded, and color unevenness and white core phenomenon can be avoided.

[0051] (3) Controlling the contact height of the spraying element and the fabric can avoid ink flying and color difference caused by the interaction of the falling trajectory of the dye liquor. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 Figure 1 is a schematic diagram of the spraying of two groups of nozzles without protective covers.

[0053] Figure 2 Figure 2 is a schematic diagram of the spraying trajectory of a single nozzle with a protective cover, and the shaded part is the final spraying shape.

[0054] Figure 3 Figure 3 is a schematic diagram of the setting of the recovery tank.

[0055] Figure 4 Figure 4 is a schematic diagram of the first row of four groups of nozzles arranged in intervals, and the second row arranged in intervals.

[0056] Figure 5 Figure 5 is a schematic diagram of the overall spraying dyeing device. DETAILED DESCRIPTION

[0057] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present application, the technical solutions of the present application will be described in detail below, but it should not be understood as limiting the scope of the present application.

[0058] A typical structure of the spraying dyeing device provided by the present application is shown in Figures 3-5 Figure 1 (this device is used in Examples 1-5 and Comparative Examples 1-5):

[0059] The liquid jet dyeing device comprises two rows of 8 groups of liquid jet parts (as shown in Figure 4 、 Figure 5 ) arranged transversely and spaced apart, the liquid jet part comprising a spray head 1, a protective cover 2, and a needle plate 3.

[0060] The spray head 1 is an electromagnetic valve spray head.

[0061] The spray head 1 is arranged at the inner top end of the protective cover 2.

[0062] The protective cover 2 is arranged outside the spray head 1.

[0063] The needle plate 3 is arranged below the bottom opening of the protective cover 2, and the needle plate 3 is provided with a dense needle structure with a height of 2 mm and a spacing of 1 mm.

[0064] The protective cover 2 is a cuboid, and the size of the bottom opening of the protective cover 2 is 15 cm x 15 cm.

[0065] The vertical distance between the spray head 1 and the bottom opening of the protective cover 2 is 20 cm.

[0066] The transverse spacing (spacing along the transverse direction of the fabric) between adjacent liquid jet parts is 12 cm, calculated as the distance between the centers of the spray heads.

[0067] The longitudinal spacing (spacing along the longitudinal direction or running direction of the fabric) between the two adjacent rows of liquid jet parts is 1 cm, calculated as the distance between the edges of the bottom openings of the protective covers.

[0068] The inside of the bottom opening of the protective cover 2 is provided with a liquid jet baffle recovery groove 4 (as shown in Figure 3 ), which is inclined upward by 15° and has an edge width of 1 cm.

[0069] The distance between the bottom opening of the protective cover 2 and the needle plate 3 is adjusted according to the process requirements, i.e., the jet height in Table 1.

[0070] Figure 1 It is a schematic diagram of the jetting overlap of two groups of spray heads without protective covers. As can be seen from Figure 1 , the liquid droplets sprayed by the spray heads intersect and interfere with each other, and uniform dyeing effect cannot be obtained.

[0071] Figure 2 It is a schematic diagram of the jetting trajectory of a single spray head with a protective cover, wherein the shaded part is the final jet shape. Due to the protective cover, the liquid droplets sprayed by the spray head will form a regular shape, avoiding the problem of mutual interference of the spray heads.

[0072] Example 1

[0073] The present embodiment provides a liquid jet dyeing process, wherein:

[0074] Fabric: Cotton knitted double-sided fabric, DK INTERLOCK 50s 137 COMPACT YARN, 185g / m2 2 ;

[0075] Dye: Lihuang black LED, concentration of 30g / L;

[0076] Graft modification treatment solution: graft modification auxiliary is an azepine cationic compound (HW-168A of Suzhou Hengwang Chemical Co., Ltd.), concentration of 70g / L;

[0077] Alkali agent: 50% liquid alkali (NaOH), concentration of 15g / L.

[0078] The process comprises:

[0079] The fabric is made to pass through an even mangle to fully dip the graft modification treatment solution, the liquid retention rate is 100%, then it is stacked at 25℃ for 24h, after stacking, the fabric is made to enter the dyeing vat to wash 3 times, the bath ratio is 1:8, after washing, the fabric is dried at 135℃, to obtain the modified fabric;

[0080] The modified fabric is sprayed with dye by using the above-mentioned spraying dyeing device, the bottom of the protective cover 2 is 2mm away from the fabric surface, the dye application amount is 50% of the fabric weight, i.e. the liquid retention rate is 50%, when the dye liquor is applied, the fabric sample is fixed on the special needle plate 3, then the fabric is cold-stacked and sealed and rolled, the cold-stacking temperature is 25℃, the time is 24h, after treatment, water washing and neutralization are carried out.

[0081] Example 2

[0082] The difference between this example and example 1 is that the spraying height is set to 1mm, and the fabric is processed according to the method of example 1.

[0083] Example 3

[0084] The difference between this example and example 1 is that the spraying height is set to 5mm, and the fabric is processed according to the method of example 1.

[0085] Example 4

[0086] The difference between this example and example 1 is that the liquid retention rate is controlled to 30%, and the fabric is processed according to the method of example 1.

[0087] Example 5

[0088] The difference between this example and example 1 is that the liquid retention rate is controlled to 60%, and the fabric is processed according to the method of example 1.

[0089] Comparative Example 1

[0090] The difference between the present comparative example and Example 1 is that the spraying height is set to 7 mm, and the other processes are the same as those in Example 1.

[0091] Comparative Example 2

[0092] The difference between the present comparative example and Example 1 is that the belt liquid rate is controlled to 90%, and the other processes are the same as those in Example 1.

[0093] Comparative Example 3

[0094] The difference between the present comparative example and Example 1 is that the belt liquid rate is controlled to 20%, and the other processes are the same as those in Example 1.

[0095] Comparative Example 4

[0096] The difference between the present comparative example and Example 1 is that the fabric is placed on a flat plate without using a needle plate to support the fabric during spraying, and the other processes are the same as those in Example 1.

[0097] Comparative Example 5

[0098] The difference between the present comparative example and Example 1 is that the special protective cover is removed during spraying, and the other processes are the same as those in Example 1.

[0099] The fabrics obtained from the examples and comparative examples are tested according to the following standards:

[0100] GB / T 250-2008 "Textiles - Color fastness test - Evaluation of color change with gray scale";

[0101] GB / T 8424.3-2018 "Textiles - Color fastness test - Calculation of color difference".

[0102] The test results are shown in Table 1.

[0103] Table 1

[0104]

[0105] According to the above experimental results, it can be seen that:

[0106] Among them, the spraying height of Comparative Example 1 is higher, which results in a larger color difference at the seam of the dye area on the surface of the fabric, and a uniform fabric cannot be obtained.

[0107] The belt liquid rate of Comparative Example 2 is higher, and the obtained fabric has a relatively uniform color without obvious color difference, but the fixation rate decreases greatly.

[0108] The belt liquid rate of Comparative Example 3 is lower, and the dyeing liquid cannot fully penetrate the fabric, resulting in white spots on the reverse side.

[0109] The comparative example 4 does not use a needle plate when dyeing, resulting in a uniform color on the front of the fabric, but the dyeing solution cannot penetrate to the back of the fabric, and there is a serious color difference between the front and back, and the color fixing rate is also reduced.

[0110] The comparative example 5 does not use a protective cover when dyeing, resulting in splashing of the sprayed liquid, overlapping marks in some areas of the fabric, uneven color, and obvious color difference.

[0111] The fabric obtained by the embodiment of the present application has a uniform color, and there is no color difference at the head and tail and the entire fabric.

[0112] Compared with traditional cold pad-batch dyeing, the technical scheme of the present application avoids the problem of inconsistent fabric color caused by the constant change of dye tank concentration in the traditional cold pad-batch dyeing process. In addition, the liquid carrying rate of cold pad-batch is as high as 70-100%, and fluctuations in liquid carrying rate are also easy to occur during machine operation, thereby easily causing front and back color difference. The liquid spraying is a non-contact dyeing, and the liquid carrying rate is 30-60%, which can be accurately controlled by the flow meter. In addition, the protective cover designed in the present application can ensure that the liquid carrying rate of each part of the fabric remains uniform. Low liquid carrying rate saves chemicals and water, while also reducing the amount of free water on the fabric, reducing the risk of dye hydrolysis, and improving the dye fixing rate. In addition, the fabric sample is placed on a specific needle plate in the present application, which can increase the permeability of the dyeing solution without affecting the structure of the fabric itself, and can achieve uniform and penetrating dyeing effect without front and back color difference.

Claims

1. A liquid jet dyeing device comprising at least one set of liquid jet units, the liquid jet units comprising a nozzle, a protective cover, and a needle plate; the nozzle is selected from solenoid valve nozzles and / or pneumatic atomizing nozzles; the nozzle is arranged at the inner top end of the protective cover; the protective cover is arranged outside the nozzle; the needle plate is arranged below the bottom opening of the protective cover. wherein The protective cover is a cuboid, and the size of the bottom opening of the protective cover is (12-15) cm x (12-15) cm. The vertical distance between the nozzle and the bottom opening of the protective cover is 20-25 cm. The inside of the bottom opening of the protective cover is provided with a liquid jet baffle recovery groove, which is inclined upward; Preferably, the liquid jet baffle recovery groove is inclined upward at an angle of 15°-30°; 2. The jet dyeing apparatus according to claim 1, wherein Preferably, the edge width of the liquid jet baffle recovery groove is 1-2 cm.

3. The jet dyeing apparatus according to claim 1, wherein The distance between the bottom opening of the protective cover and the needle plate is 1-5 mm.

4. The jet dyeing apparatus according to claim 1, wherein The needle plate is provided with needle-shaped structures with a height of 2-4 mm and a spacing of 1-2 mm. The liquid jet dyeing device comprises at least two rows of liquid jet units arranged at intervals. 8.A liquid jet dyeing process using the liquid jet dyeing device of any one of claims 1-7.

5. The jet dyeing apparatus according to claim 1, wherein The liquid jet dyeing process comprises:

6. The jet dyeing apparatus according to claim 1, wherein placing the fabric subjected to graft modification treatment on the surface of the needle plate; 7. The jet dyeing apparatus according to claim 1, wherein injecting dyeing liquid to the surface of the fabric using the nozzle to perform dyeing; performing cold piling, washing, and drying on the dyed fabric to complete the liquid jet dyeing process.

9. The jet dyeing process according to claim 8, wherein, The graft modification treatment uses a graft modification treatment agent selected from one or more than two combinations of polyamine polymers, amide polymers, epoxy compounds, quaternary ammonium salt compounds, cationic propylene copolymers, natural cationic modifiers, and polymeric cationic compounds; Preferably, the polyamine polymer comprises an azepine cationic compound; the amide polymer comprises a polyamide resin; and the quaternary ammonium salt compound comprises a s-triazine-based quaternary ammonium salt compound. Preferably, the graft modification treatment is performed by applying a graft modification treatment liquid; the concentration of the graft modification treatment agent is 30-70 g / L, based on the volume of the graft modification treatment liquid. Preferably, the liquid retention rate of the graft modification treatment is 80-100%.

10. The jet dyeing process according to claim 9, wherein, Preferably, the temperature of the graft modification treatment is 25-30℃. Preferably, the graft modification treatment is performed by rolling and stacking, and the rolling and stacking time is 12-24 h. The liquid jet dyeing process further comprises a step of performing a hydrophilicity improvement treatment on the fabric subjected to graft modification treatment. Preferably, the hydrophilicity improvement treatment uses a treatment agent containing an alkali agent 2-4 g / L and a penetrating agent 1-4 g / L. Preferably, the treatment temperature of the hydrophilicity improvement treatment is 60-90℃, the treatment time is 30-60 min, and the treatment bath ratio is 1:5-20. Preferably, the hydrophilicity improvement treatment requires a water drop spreading time of less than or equal to 3 s.

11. The jet dyeing process according to claim 9, wherein, The composition of the dyeing liquid comprises reactive dyes 0.1-100 g / L, fixing alkali agents 1-30 g / L, and penetrating agents 1-10 g / L. ​ ​ ​ 12. The jet dyeing process according to claim 9, wherein, ​ Preferably, the fixing alkali agent is selected from carbonates and / or hydroxides.

13. The jet dyeing process according to claim 9, wherein, The liquid rate of the dyeing belt is 30%-60%; preferably, the liquid flow rate of a single nozzle is 14-70 L / h, and the fabric running speed is 20-70 m / min.

14. The jet dyeing process according to claim 9 or 13, wherein, Total flow = fabric weight × fabric width × vehicle speed × liquid rate × 6%, unit: L / h.

15. The jet dyeing process according to claim 8 or 9, wherein, During the dyeing process of the jet dyeing solution, the jet dyeing device is fixed and the fabric runs, and the lowest position of the jet dyeing device is 1-5 mm away from the fabric height.

16. The jet dyeing process according to claim 9, wherein, The temperature of the cold pad dyeing is 25-30℃, and the stacking time is 12-24 h.

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