Printing and dyeing method and ink supply system thereof

Abstract

The invention discloses a printing and dyeing method and an ink supply system thereof, and relates to the technical field of printing and dyeing, and the printing and dyeing method comprises the following steps: determining a fabric, testing the optimal liquid carrying rate of the fabric, obtaining the ink supply amount per square meter by using the optimal liquid carrying rate, measuring a Lab value or an HSB value, and carrying out color separation through RIP software to obtain the ink supply amount per square meter of each color, the measurement mode of the optimal liquid carrying rate is as follows: weighing the dry fabric and recording the weight m1; immersing the dry fabric into a dye, and fully stirring to enable the fabric to adsorb the dye liquor, so as to obtain a wet fabric; the wet fabric is attached to the surface of a rubber roller, a padder is started to run until no obvious color points or mottles exist on the surface of the fabric, and the treated wet fabric is obtained; weighing the treated wet fabric and recording the weight m2; the optimal liquid carrying rate is calculated according to the following formula: the optimal liquid carrying rate (%) is equal to (m2-m1) / m1 * 100%. According to the printing and dyeing method and the ink supply system thereof, the accurate mixing and uniform distribution of colors are realized while the dye consumption is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing, and in particular to a printing and dyeing method and an ink supply system thereof. Background Art

[0002] Dyeing in printing and dyeing refers to the process of transferring dyes from dye liquor to fibers to make the fibers present uniform, strong and bright colors. This is an important part of the processing of textile materials (such as fibers, yarns and fabrics), and together with printing, it constitutes the main part of printing and dyeing. In the current printing and dyeing technology, dye vat immersion dyeing and digital color separation printing are two commonly used methods, but they both have some disadvantages and usage problems.

[0003] Dyeing in a dye vat means placing the fabrics one by one in a dye vat with dyes prepared for dyeing, and then squeezing out the excess dyes in the fabrics through rollers to achieve the purpose of dyeing. Since the fabrics continuously take away the dyes in the dye vat, it is easy to cause the color of the fabrics to be inconsistent at the beginning and end, and there is a large waste of dyes, a large amount of water consumption, and high unit energy consumption.

[0004] Digital color separation printing, this equipment generally uses the CMYK color separation principle, and uses a nozzle to print ink onto the fabric. Since the more color separations, the more nozzles are used, and the high cost of the nozzles limits the use of 4-10 colors, the color gamut of digital printing and dyeing is far from the effect of pre-mixing and then printing and dyeing. Digital printing machines are expensive, and the maintenance costs, ink nozzles and other consumables are relatively high. Summary of the invention

[0005] In order to solve the technical problems existing in the above background technology, one of the objects of the present invention is to provide a printing and dyeing method, comprising the following steps:

[0006] S0, determine the fabrics that need to be printed and dyed;

[0007] S1, testing its optimal liquid carrying rate;

[0008] S2, using the optimal liquid carrying rate to obtain the ink supply per square meter of the fabric, wherein the ink supply per square meter = optimal liquid carrying rate * fabric weight per square meter;

[0009] S4, then by measuring the Lab value or HSB value of the color, and separating the colors through RIP software, the ink supply per square meter of each color is obtained;

[0010] Among them, the measurement method of the optimal liquid carrying rate is as follows:

[0011] S10, weigh the dry fabric and record the weight m1;

[0012] S11, immersing the dry fabric in the dye and stirring it fully to allow the fabric to absorb the dye solution, thereby obtaining a wet fabric;

[0013] S12, applying the wet fabric to the surface of the rubber roller and starting the padder until there are no obvious color spots or spots on the surface of the fabric, thereby obtaining the treated wet fabric;

[0014] S13, weigh the wet fabric after treatment and record the weight m2;

[0015] S14, use the following formula to calculate the optimal liquid carrying rate, optimal liquid carrying rate (%) = (m2-m1) / m1×100%.

[0016] The RIP software mentioned in the above technical solution is a raster image processor (Raster Image Processor), which is specially used for typesetting of digital graphics. The main functions of this software include image editing, typesetting and output, and it plays an important role in the preliminary processing of digital image output. The common RIP software on the market are Mengtai, Fiery, washci, ONYX, neoStampa, Ruiyin, etc. The proposal of the optimal liquid carrying rate is based on a deep understanding of the interaction mechanism between dyes and fabrics in the printing and dyeing process. In traditional printing and dyeing, the liquid carrying rate is only related to the content of dye absorbed by the fabric, and has not been clearly quantified and controlled, which leads to the printing and dyeing effect often being affected by multiple factors and difficult to achieve the ideal state. The inventor of this technical solution creatively proposed the concept of the optimal liquid carrying rate through systematic research and practical verification, and used it as a key parameter for optimizing the printing and dyeing effect. This innovation not only fills the technical gap, but also provides new ideas for the refined control of the printing and dyeing industry. Secondly, at the technical application level, the optimal liquid carrying rate brings significant optimization effects to the automatic color mixing ink supply system. By accurately measuring and controlling the liquid-carrying rate of the fabric, the system can more accurately calculate the ink supply per square meter of fabric, thereby achieving accurate mixing and uniform distribution of colors. This refined control not only improves the quality stability of printing and dyeing products, but also significantly improves the performance of the automatic color mixing and ink supply system. In addition, from the perspective of actual technical effects, the application of the optimal liquid-carrying rate also brings multiple practical benefits. On the one hand, due to the precise control of the liquid-carrying rate, the waste of dyes in the printing and dyeing process is effectively reduced, reducing production costs; on the other hand, the degree of automation and standardization of the printing and dyeing process is improved, the quality fluctuations caused by human factors are reduced, and production efficiency is improved. These practical effects fully demonstrate the application value of the optimal liquid-carrying rate in the automatic color mixing and ink supply system. The optimal liquid-carrying rate of this technical solution is the data obtained by testing after dyeing different fabrics through experiments. The evaluation standard is the uniformity of the dyeing effect. It is explained that the conventional liquid-carrying rate only refers to the water content (liquid content) of the fabric, and the optimal liquid-carrying rate is two different application concepts.

[0017] The preferred technical solution of the present invention is that in S0 and S2, the fabric is subjected to ultrasound-assisted bio-enzyme pretreatment.

[0018] The preferred technical solution of the present invention is that, in S2, the optimal liquid pick-up rate is repeatedly tested three times or more, and the average value is taken as the final optimal liquid pick-up rate, so as to improve the stability and repeatability of printing and dyeing.

[0019] The preferred technical solution of the present invention is that, in S12, the pressure of the rolling mill is set at 0.4-0.8 MPa, and the surface hardness of the rubber roller is 50-80 degrees Shore.

[0020] The preferred technical solution of the present invention is that in S12, the ambient temperature is 25-28°C and the humidity is 40%-55%.

[0021] The preferred technical solution of the present invention is that the fabric is milk silk.

[0022] In order to solve the above-mentioned technical problems, the second purpose of the present invention provides an ink supply system, including several dye storage units, a mixer, an ink barrel and a control unit. The control unit adjusts the usage of each dye storage unit through the printing and dyeing method of the above-mentioned technical solution. The outlets of the several dye storage units are respectively connected to the inlet pipes of the mixer. Weighing units for weighing are respectively arranged between the outlets of the dye storage units and the inlet of the mixer. The static mixer is used for fully mixing different inks. The outlet of the static mixer is connected to the inlet pipe of the ink barrel. The control unit and the weighing unit are electrically connected.

[0023] The preferred technical solution of the present invention is that the control unit also establishes a database of optimal liquid pick-up rates for fabrics to record the optimal liquid pick-up rates corresponding to different fabrics.

[0024] The preferred technical solution of the present invention is that it also includes a temperature sensor, a humidity sensor, a temperature adjustment unit and a humidity adjustment unit. The temperature sensor, the humidity sensor, the temperature adjustment unit and the humidity adjustment unit are electrically connected to the control unit respectively, and are used to detect and control the temperature and humidity in the printing and dyeing process.

[0025] The preferred technical solution of the present invention is that it also includes a spectrophotometer, which is electrically connected to the control unit and is used to feed back the color value of the sample to adjust the dosage of the dye storage unit.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) In terms of printing and dyeing methods, by determining the fabrics to be printed and dyed and testing their optimal liquid absorption rate, the maximum adsorption capacity of the fabrics for dyes can be accurately grasped to avoid waste caused by excessive use of dyes. Then, the ink supply per square meter is calculated using the optimal ink per square meter. This step not only ensures the accuracy of the dye dosage and achieves accurate mixing and uniform distribution of colors, but also has simple steps and a low application threshold, making it easy to promote and apply;

[0028] (2) In the ink supply system, the control unit adjusts the usage of each dye storage unit based on the printing and dyeing method of the present invention, reduces the amount of dye used and accurately controls the color ratio, improves production efficiency, and makes the entire printing and dyeing process more controllable, in line with the requirements of environmental protection and sustainable development. By optimizing the printing and dyeing process and improving product quality, it helps to improve the environmental protection level and sustainability of the entire industrial chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 is a schematic diagram of a printing and dyeing method in Example 1;

[0031] Figure 2 is a structural schematic diagram of an ink supply system in Example 1;

[0032] Figure 3 It is a schematic diagram of the structure of the static mixer in Example 1;

[0033] Figure 4 This is an electrical connection diagram of an ink supply system in Example 1.

[0034] In the figure:

[0035] 1-dye storage unit; 2-static mixer; 21-temperature sensor; 22-heater; 23-fin; 24-static mixing element; 25-housing; 3-ink barrel; 4-control unit; 5-weighing unit; 51-electronic scale; 52-flow meter; 6-solenoid valve; 71-first filter; 72-second filter; 8-ink pump. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with examples. These examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually carried out according to conventional conditions in the art or according to the conditions recommended by the manufacturer; the raw materials, reagents, etc. used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection claimed by the present invention.

[0037] Example 1

[0038] An ink supply system for color mixing provided in this embodiment includes four dye storage units 1, a static mixer 2, an ink barrel 3 and a control unit 4, the outlets of the four dye storage units 1 are respectively connected to the inlet end pipelines of the static mixer 2, the pipelines are pumped by the ink pump 8, and a weighing unit 5 for weighing is respectively arranged between the outlet of the dye storage unit 1 and the inlet end of the static mixer 2, the static mixer 2 is used for fully mixing different inks, the outlet end of the static mixer 2 is connected to the inlet end pipeline of the ink barrel 3, the pipeline is pumped by the ink pump 8, and the control unit 4 is electrically connected to the weighing unit 5. The mixed dye is stored in the ink barrel 3 to be dyed. The technical solution of this embodiment introduces a static mixer, and the adoption of this core component is an innovation in the traditional power stirring method used in the field of printing and dyeing. The static mixer does not require any external power, so it completely gets rid of the dependence of the traditional rotary agitator on electrical energy or mechanical energy. This change not only significantly reduces the energy consumption of the system, but also fundamentally eliminates the wear and maintenance problems of the power components, thereby greatly reducing the maintenance cost and the failure rate during use. Another major advantage of the static mixer is that it has a simple structure, no dead corners, a variety of design methods, easy assembly, and is not easy to accumulate impurities and residues. Compared with the complex rotating stirring structure, the static mixer performs well in cleaning, effectively solving the cleaning problem that has long plagued users. Users can more easily maintain the hygiene of the equipment and ensure the purity of the ink and the quality of printing and dyeing. In addition to the innovative application of the static mixer, this technical solution is also equipped with a high-precision weighing unit. This technical feature not only realizes the precise control of the flow rate of each ink, but also ensures the accuracy of the mixing ratio. During the mixing process, the weighing unit can monitor the flow rate of the ink in real time and feed the data back to the control unit to ensure that the mixed ink ratio strictly meets the preset requirements. This precise control not only improves the mixing quality, but also makes the entire ink supply process more reliable and stable. In addition, the electrical connection between the control unit and the weighing unit further enhances the intelligence and automation level of the system. The control unit can adjust the mixing process in real time according to the data provided by the weighing unit to ensure the uniformity and stability of the mixing. This intelligent management method not only improves production efficiency, but also reduces the risk of human operating errors, making the entire ink supply process more efficient and safe. In summary, this technical solution successfully solves the problems of difficult cleaning, high maintenance cost and high energy consumption in traditional ink supply systems through innovative static mixing methods, precise weighing control and intelligent management system. This innovative solution not only improves the overall performance of the ink supply system, but also brings more efficient, energy-saving and easy-to-maintain ink supply system options to related industries.

[0039] Preferably, the static mixer 2 and the ink barrel 3 are provided with two or more sets, and the static mixer 2 is respectively provided with a solenoid valve 6 on the pipes connected to the plurality of dye storage units 1, and the solenoid valve 6 is electrically connected to the control unit 4. The arrangement of two or more sets of static mixers and ink barrels significantly improves the redundancy and reliability of the system. During the dyeing process, when one set is working, the static mixer and the main ink barrel of the other set are cleaned, so that the color preparation work can be completed quickly, and the printing and dyeing of the next product can be carried out immediately after the printing and dyeing of the previous product is completed, thereby reducing downtime and improving production efficiency. In addition, if a set of static mixers or ink barrels fails, the other set can also take over the work immediately to ensure the continuity and stability of the production line. This design greatly reduces the risk of production stoppage due to equipment failure, which is particularly important for production environments that require high reliability. In this embodiment, the static mixer 2 and the ink barrel 3 are provided with two sets.

[0040] Preferably, a temperature sensor 21 and a heater 22 are provided in the static mixer 2 to stabilize the temperature in the static mixer 2, and the control unit 4 is electrically connected to the temperature sensor 21 and the heater 22. It solves the influence of temperature on the ink mixing effect. Temperature is an important factor affecting chemical reactions and physical mixing. Maintaining a stable temperature environment is crucial to ensuring the consistency and quality of ink mixing. By setting a temperature sensor, the system can monitor the temperature in the static mixer in real time and accurately control it through the heater to ensure temperature stability during the mixing process. In addition, the electrical connection between the control unit, the temperature sensor and the heater enables the system to automatically adjust according to temperature feedback, thereby improving the system's automation and mixing accuracy.

[0041] Preferably, the inner wall of the static mixer 2 is provided with fins 23. The presence of the fins increases the surface area of ​​the inner wall of the mixer, thereby providing more contact points, so that the ink can more fully contact the inner wall when flowing through the mixer, thereby improving the mixing effect. In addition, the fins may also induce more eddies and turbulence, and these changes in flow states help to quickly and evenly mix the ink. Therefore, by providing fins on the inner wall, the static mixer can complete the task more efficiently and improve the performance of the overall ink supply system.

[0042] Preferably, a plurality of static mixing elements 24 are provided in the static mixer 2, and the static mixing element 24 is one or more of a network, a spiral, and a staggered plate. The diversity and combination of static mixing elements can significantly improve the mixing effect and efficiency. The network, spiral, and staggered plate-shaped static mixing elements each have their own characteristics, and the network element can increase the contact area between the fluids, the spiral element can produce a rotating flow to enhance mixing, and the staggered plate-shaped element can induce shear force to promote dispersion. The combination of these elements of different forms can form a complex flow pattern and a strong turbulent effect inside the static mixer, so that different inks can be mixed together faster and more evenly. In addition, this diversified design of mixing elements also increases the flexibility and adjustability of the mixing process. According to different mixing requirements, the type and combination of elements can be adjusted to achieve the best mixing effect. In the present embodiment, the static mixer 2 is provided with a spiral static mixing element at the inlet end, and a network static mixing element is provided at the outlet end.

[0043] Preferably, the static mixing element 24 comprises a network-shaped static mixing element, and is made of an elastic material. The elastic material allows the element to deform to a certain extent under fluid pressure, which not only increases the contact area between the element and the fluid, but also can generate more eddies and turbulence through deformation, thereby improving mixing efficiency.

[0044] Preferably, the housing 25 of the static mixer 2 is made of a transparent material. The housing made of a transparent material allows the operator to directly observe the mixing process and state of the ink inside the static mixer, so as to adjust the operating parameters in time to obtain the best mixing effect. This instant feedback mechanism not only improves the convenience and accuracy of operation, but also helps to promptly discover and solve problems such as ink blockage, uneven mixing, etc. In addition, the transparent housing is also easy to clean and maintain, and the operator can clearly see the cleanliness of the inside of the mixer to ensure the hygiene and safety of the equipment. Therefore, the static mixer housing made of a transparent material has significant advantages in improving operating efficiency, ensuring mixing quality, and simplifying equipment maintenance.

[0045] Preferably, the weighing unit 5 comprises an electronic scale 51 and a flow meter 52, the dye storage unit 1 is arranged on the electronic scale 51, and is used to weigh the weight change of the dye storage unit 1, the flow meter 52 is arranged on the pipeline connecting the dye storage unit 1 and the static mixer 2, and the control unit 4 is electrically connected to the electronic scale 51 and the flow meter 52 respectively. First, by monitoring the weight change of the dye storage unit in real time through the electronic scale, the system can accurately grasp the consumption of the dye, so as to replenish it in time and ensure the continuity of production. This direct weight monitoring method is more accurate than the traditional liquid level sensor, because it is not affected by factors such as dye density and temperature, and provides more accurate data support for the ink supply system. Secondly, the setting of the flow meter enables the system to monitor the flow of the dye in real time, which is very important for controlling the mixing ratio and ensuring the mixing quality. Through the electrical connection with the control unit, the data of the flow meter can be fed back in real time, so that the system can quickly adjust the supply speed of the dye to meet the needs of different printing or dyeing tasks. Finally, the electrical connection of the control unit with the electronic scale and the flow meter realizes the automatic collection and processing of data, which greatly improves the automation level of the system. This not only reduces manual operation errors and labor intensity, but also enables the ink supply system to respond to various production scenarios more intelligently, improving production efficiency and product quality.

[0046] Preferably, a first filter 71 is also included, and the first filter 71 is arranged on the pipe connected between the outlet of the dye storage unit 1 and the inlet end of the static mixer 2. The first filter can effectively remove impurities and particulate matter in the dye, and ensure the quality of the dye entering the static mixer. This can not only prevent impurities from clogging or damaging the mixer, but also ensure the purity and stability of the mixed ink, thereby improving the quality of printing or dyeing. Secondly, by arranging a filter at the outlet of the dye storage unit, the service life of the static mixer and other downstream equipment can be extended. Because the filter can block most of the pollutants, the wear and corrosion of these equipment is reduced, and the maintenance cost and replacement frequency are reduced. Similarly, further, a second filter 72 is also included, and the second filter 72 is arranged at the outlet of the ink barrel 3. The second filter can further ensure the purity of the ink. The last filtration before the ink flows out of the ink barrel can effectively remove any impurities or particles that may be generated during the storage or transfer process, and ensure the quality of the output ink. Secondly, the existence of the filter is crucial to protecting downstream equipment, such as nozzles or print heads. These devices are usually very precise and have extremely high requirements for the purity of the ink. The second filter prevents the passage of any particles that could clog or damage these devices, thus extending their service life and reducing maintenance costs.

[0047] The control unit of the ink supply system adjusts the usage of each dye storage unit by the following printing and dyeing method:

[0048] The fabric used in this embodiment is satin chiffon (100% polyester with a fabric weight of 83g per square meter), and the dye storage unit is a four-color separation. The optimal liquid pick-up rate is tested according to the following method, which includes the following steps:

[0049] S10, weigh the dry fabric and record the weight m1;

[0050] S11, immersing the dry fabric in the dye and stirring it fully to allow the fabric to absorb the dye solution, thereby obtaining a wet fabric;

[0051] S12, applying the wet fabric to the surface of the rubber roller and starting the padder until there is no obvious color spot or mottle on the surface of the fabric, thereby obtaining the treated wet fabric; wherein the pressure of the padder is set at 0.45 MPa, the surface hardness of the rubber roller is 70 degrees Shore, the diameter of the rubber roller is 18 cm, and the thickness of the rubber coating is 1 cm; the ambient temperature is 25°C, and the humidity is 40%-55%;

[0052] S13, weigh the wet fabric after treatment and record the weight m2;

[0053] S14, use the following formula to calculate the optimal liquid carrying rate, optimal liquid carrying rate (%) = (m2-m1) / m1×100%.

[0054] Repeat the above steps to test the optimal liquid pick-up rate three times, and take the average value as the final optimal liquid pick-up rate to improve the stability and repeatability of printing and dyeing.

[0055] In this embodiment, the satin chiffon fabric is tested three times and its average best liquid pick-up rate (%) is 10.3%.

[0056] Combined with the above data, the fabric weight per square meter of satin chiffon is 83g, and the ink supply per square meter of the fabric is obtained using the optimal liquid pick-up rate, and the ink supply per square meter is calculated to be = optimal liquid pick-up rate * fabric weight per square meter = 8.55g.

[0057] According to the Lab value of the color, the ink supply per square meter of each color is obtained by color separation through RIP software and the calculated ink supply per square meter; the color of this embodiment is pink, and after testing, its Lab values ​​are L=65, a=37, b=-3, respectively. The ink supply system uses RIP software CMYK color separation to obtain the ink supply of each color and then dyes the fabric. The final dyeing effect of the fabric is shown in Table 1.

[0058] Example 2

[0059] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the fabric is milk silk (95% polyester 5% spandex fabric weight per square meter is 210g), and after three tests, its average optimal liquid carrying rate (%) = 42.6%, and the ink supply per square meter is calculated = the optimal liquid carrying rate per square meter fabric weight = 89.46g. The Lab value is the same as that of embodiment 1, which is L = 65, a = 37, b = -3 respectively. The ink supply system is separated by RIP software CMYK, and the fabric is dyed after the ink supply of each color is obtained. The dyeing effect of the final fabric is shown in Table 1.

[0060] Example 3

[0061] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the fabric is pretreated with ultrasonic-assisted biological enzymes. Specifically, the steps are as follows: place the fabric in an ultrasonic cleaning tank, add an appropriate amount of water, start the ultrasonic generator, and use the cavitation effect and vibration of the ultrasonic wave to perform preliminary physical cleaning on the fabric to remove large particles of impurities and loose dirt on the surface to avoid affecting the subsequent dyeing. Then add lipase in an amount of 0.2g / 1L, start the ultrasonic generator, control the temperature at 30-35°C, treat for 10 minutes, and use the promotion effect of ultrasonic waves to accelerate the penetration and reaction of lipase on the fabric fiber. Lipase can specifically decompose impurities such as grease on the surface of the fabric that are difficult to remove. After the enzyme treatment is completed, the fabric is thoroughly cleaned with clean water to remove the residual enzyme preparation and decomposition products, and the cleaned fabric is dried to prepare for the subsequent process. After three tests, the average optimal liquid carrying rate (%) = 10.4%, and the ink supply per square meter is calculated = the optimal liquid carrying rate per square meter. The fabric weight = 8.63g. The Lab values ​​are the same as those in Example 1, which are L=65, a=37, and b=-3. The ink supply system uses the RIP software CMYK color separation to obtain the ink supply amount of each color and then dyes the fabric. The final dyeing effect of the fabric is shown in Table 1.

[0062] Example 4

[0063] In this embodiment, the difference from the printing and dyeing method of Example 1 is that the pressure of the padder is set at 0.65 MPa, the surface hardness of the rubber roller is 60 degrees Shore, the diameter of the rubber roller is 18 cm, and the thickness of the rubber coating is 1 cm. After three tests, the average optimal liquid carrying rate (%) = 10.1%, and the ink supply per square meter is calculated = the optimal liquid carrying rate per square meter. The fabric weight = 8.38g. The Lab value is the same as that of Example 1, which is L = 65, a = 37, b = -3. The ink supply system is separated by RIP software CMYK, and the fabric is dyed after the ink supply of each color is obtained. The final fabric dyeing effect is shown in Table 1.

[0064] Example 5

[0065] The ink supply system for color mixing in this embodiment is different from the ink supply system in Embodiment 1 in that the control unit also establishes a database of optimal liquid carrying rate for fabrics to record the optimal liquid carrying rate corresponding to different fabrics. When printing and dyeing new fabrics, the control unit can automatically query the database to obtain the corresponding optimal liquid carrying rate, thereby more accurately controlling the amount of dye and the printing and dyeing effect. At the same time, the database can also record the process parameters and results of each printing and dyeing for subsequent analysis and optimization.

[0066] Specifically, first, collect various fabric samples commonly found in the market, and record in detail the material, structure, thickness, weight, purpose and other characteristics of each fabric; use professional equipment and methods to test the liquid pick-up rate of each fabric under different conditions. These conditions may include different ink types, colors, viscosities, temperatures, humidity, etc.; record process parameters related to the liquid pick-up rate test, such as printing speed, pressure, ink supply, etc. With the emergence of new materials and new processes and changes in market demand, continuously update and supplement the data in the database. Integrate the fabric optimal liquid pick-up rate database with the control unit to achieve automatic control and optimization. Automatically adjust the liquid pick-up rate according to the fabric type and process parameters to improve printing quality and efficiency.

[0067] Preferably, it also includes a humidity sensor and a humidity regulating unit; the humidity sensor and the humidity regulating unit are electrically connected to the control unit respectively, and are used to detect and control the humidity during the printing and dyeing process.

[0068] Specifically, according to the requirements of the printing and dyeing process and the on-site environment, select suitable sensors to ensure that their measurement range, accuracy and response time meet actual needs. Install the sensor in a location that can accurately reflect the parameters of the printing and dyeing environment, such as near the printing area or ink storage area. Furthermore, a temperature / humidity control strategy can be formulated, such as setting temperature / humidity thresholds, adjusting the power of the equipment, etc., to achieve stable control of temperature / humidity. The temperature / humidity of the printing and dyeing environment is monitored in real time through the temperature / humidity sensor, and the data is fed back to the control unit. When the temperature / humidity exceeds the preset range, the control unit should trigger the alarm mechanism so that the operator can detect and handle abnormal conditions in time.

[0069] Preferably, a spectrophotometer is further included, and the spectrophotometer is electrically connected to the control unit for feeding back the Lab value of the sample to adjust the dosage of the dye storage unit.

[0070] Specifically, select a suitable spectrophotometer according to the needs of the system to ensure that its measurement range, accuracy and stability meet the requirements. Integrate the spectrophotometer into the ink supply system and ensure that the electrical connection with the control unit is stable and reliable. Calibrate the spectrophotometer regularly to ensure the accuracy of its measurement results. At the same time, verify the reliability of the measurement results through verification experiments. The system can adaptively adjust the amount of dye based on historical data and real-time data. For example, when it is found that the usage of a certain dye frequently exceeds expectations, the system can automatically increase the storage of the dye or adjust its supply. The results of each adjustment and related data are recorded in the database. These data can be used for subsequent analysis and optimization work to improve the performance and accuracy of the system.

[0071] Comparative Example 1

[0072] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the liquid carrying rate is 11%, and the ink supply per square meter = liquid carrying rate * fabric weight per square meter = 9.13g, and the subsequent ink supply calculation for color separation is performed.

[0073] Comparative Example 2

[0074] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the liquid carrying rate is 9.5%, and the ink supply per square meter = liquid carrying rate * fabric weight per square meter = 7.89g, and the subsequent ink supply calculation for color separation is performed.

[0075] Comparative Example 3

[0076] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the liquid carrying rate is 15%, and the ink supply per square meter = liquid carrying rate * fabric weight per square meter = 12.45g, and the subsequent ink supply calculation for color separation is performed.

[0077] Comparative Example 4

[0078] In this embodiment, the difference from the printing and dyeing method of embodiment 1 is that the liquid carrying rate is 7%, and the ink supply per square meter = liquid carrying rate * fabric weight per square meter = 12.45g, and the subsequent ink supply calculation for color separation is performed.

[0079] The test results of the fabrics finally obtained from Examples 1-4 and Comparative Examples 1-4 are shown in Table 1

[0080] Table 1 - Performance test results of Examples 1-4 and Comparative Examples 1-4

[0081]

[0082]

[0083] It can be seen from the data results in Table 1 that the fabrics of Examples 1-4 can accurately grasp the maximum adsorption capacity of the fabrics for the dyes according to the printing and dyeing method proposed by the present invention, that is, by determining the dye dosage calculated by the optimal liquid carrying rate of the corresponding fabrics, to avoid waste caused by excessive use of dyes, and the printed and dyed fabrics have uniform appearance colors without obvious pitting, and the precise mixing and uniform distribution of the required colors are achieved, and the method steps are simple, the application threshold is low, and it is easy to promote and apply. It is noted that the Lab value is measured in this embodiment, and the HSB value can also be measured according to actual requirements. It is noted that the pressure of the padding car is set at 0.4-0.8mpa, and the surface hardness of the rubber roller is within the range of 50-80 degrees Shore, and the dyeing effect of the optimal liquid carrying rate value obtained meets the production requirements of actual high-quality products.

[0084] From the data comparison of Example 1 and Comparative Examples 1-4, it can be seen that for the same kind of fabric, the ink supply calculated by different liquid carrying rates is significantly different. When the liquid carrying rate used is too large or too small, it will also have a significant impact on the dyeing effect of the fabric. Even when the liquid carrying rate is only 1%, the resulting fabric has good and bad qualities. Therefore, testing and calculating the optimal liquid carrying rate of the fabric plays an important guiding role in the dyeing of the fabric.

[0085] The fibers of the milk silk fabric selected in Example 2 are relatively small, which increases the difficulty of dyeing and easily leads to uneven dyeing. The test calculation of the optimal liquid carrying rate can help determine the appropriate amount of dye, thereby ensuring that the dye can fully penetrate the amount required for the fiber interior and firmly bond with the fiber. This can not only reduce the risk of fading and discoloration, but also improve the uniformity and color saturation of dyeing.

[0086] From the comparison of the data of Example 1 and Example 3, it can be seen that the finished product obtained by the ultrasonic-assisted biological enzyme pretreatment of the fabric has a higher appearance quality. The inventors analyze the reasons as follows: the ultrasonic-assisted biological enzyme pretreatment can not only effectively remove impurities and residues on the surface of the fabric, improve the dyeing uniformity and fastness, and thus eliminate pitting. In addition, the ultrasonic treatment can also accelerate the reaction speed of the biological enzyme, shorten the processing time, and reduce energy consumption and cost.

[0087] From the data comparison of Example 1 and Example 4, it can be seen that the pressure of the padder is set at 0.65 MPa, the surface hardness of the rubber roller is 60 degrees Shore, the diameter of the rubber roller is 18 cm, and the thickness of the rubber coating is 1 cm. The liquid carrying rate obtained under this condition not only meets the appearance requirements, but also reduces the amount of dyes and wastewater discharge, and is more in line with environmental protection requirements.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A printing and dyeing method, characterized in that: The steps include: S0, determine the fabrics that need to be printed and dyed; S1, testing its optimal liquid carrying rate; S2, using the optimal liquid carrying rate to obtain the ink supply per square meter of the fabric, wherein the ink supply per square meter = optimal liquid carrying rate * fabric weight per square meter; S4, then by measuring the Lab value or HSB value of the color, and separating the colors through RIP software, the ink supply per square meter of each color is obtained; Among them, the measurement method of the optimal liquid carrying rate is as follows: S10, weigh the dry fabric and record the weight m1; S11, immersing the dry fabric in the dye and stirring it thoroughly to allow the fabric to absorb the dye solution to obtain a wet fabric S12, applying the wet fabric to the surface of a rubber roller and starting the padder until there are no obvious color spots or spots on the surface of the fabric, thereby obtaining a treated wet fabric; S13, weighing the treated wet fabric and recording the weight m2; S14, use the following formula to calculate the optimal liquid carrying rate, optimal liquid carrying rate (%) = (m2-m1) / m1×100%.

2. The printing and dyeing method according to claim 1, characterized in that: In S0 and S2, the fabrics were subjected to ultrasound-assisted bio-enzyme pretreatment.

3. The printing and dyeing method according to claim 1, characterized in that: In S2, the best liquid pick-up rate is tested repeatedly three times or more, and the average value is taken as the final best liquid pick-up rate to improve the stability and repeatability of printing and dyeing.

4. The printing and dyeing method according to claim 1, characterized in that: In S12, the pressure of the padder is set at 0.4-0.8 MPa, and the surface hardness of the rubber roller is 50-80 degrees Shore.

5. The printing and dyeing method according to claim 1, characterized in that: In S12, the ambient temperature is 25-28°C and the humidity is 40%-55%.

6. The printing and dyeing method according to claim 1, characterized in that: The fabric is milk silk.

7. An ink supply system, characterized in that: It comprises a plurality of dye storage units, a mixer and an ink barrel and a control unit, wherein the control unit adjusts the amount of each dye storage unit by the printing and dyeing method according to any one of claims 1 to 6; The outlets of several dye storage units are respectively connected to the inlet pipes of the mixer, and weighing units for weighing are respectively arranged between the outlets of the dye storage units and the inlet of the mixer. The mixer is used for fully mixing different inks, and the outlet of the mixer is connected to the inlet pipe of the ink barrel; The control unit is electrically connected to the weighing unit.

8. The ink supply system according to claim 7, characterized in that: The control unit also establishes a database of optimal liquid-carrying rates for fabrics, and records the optimal liquid-carrying rates corresponding to different fabrics.

9. The ink supply system according to claim 7, characterized in that: Also includes a temperature sensor, a humidity sensor, a temperature adjustment unit and a humidity adjustment unit; The temperature sensor, humidity sensor, temperature regulating unit and humidity regulating unit are respectively electrically connected to the control unit and are used to detect and control the temperature and humidity during the printing and dyeing process.

10. The ink supply system according to claim 7, characterized in that: Also included is a spectrophotometer; The spectrophotometer is electrically connected to the control unit and is used to feed back the color value of the sample to adjust the dosage of the dye storage unit.

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