Intelligent printing and dyeing method for fabrics of different thicknesses and fabrics

Abstract

The present invention belongs to the field of fabric printing and dyeing, and discloses an intelligent printing and dyeing method for fabrics of different thicknesses and fabrics, which can realize complete printing and dyeing of the same fabric of different thicknesses. The method comprises the following steps: step 10, using a first jetting assembly to spray dye liquid on the first side of the fabric; step 20, using a color sensor to collect color data of the second side of the fabric; the color sensor is located downstream of the first jetting assembly; step 30, according to the color data, controlling the second jetting assembly to dye the second side of the fabric; the second jetting assembly is located downstream of the color sensor.

Description

Technical Field

[0001] The present invention relates to the field of fabric printing and dyeing, and in particular to an intelligent printing and dyeing method for fabrics of different thicknesses and fabrics. Background Art

[0002] In the field of textiles, existing dyeing methods, whether it is immersion dyeing, spray dyeing, or so-called non-aqueous medium dyeing such as supercritical carbon dioxide dyeing, do not consider the thickness difference of fabrics. Various current dyeing methods all consider how to improve the dyeing effect of the head and tail of the fabric, and how to keep it consistent with the dyeing effect in the middle part, that is, the dyeing effect is often kept consistent from beginning to end, without the so-called head-to-tail difference. The second consideration is how to reduce the amount of dyes, water, additives, electricity, and gas, to achieve recycling, reduce pollution, and save energy and reduce emissions. Existing dyeing methods basically do not consider the thickness difference of different parts of the same fabric. This results in the use of the same spray dyeing amount, and the color of different thickness parts of the fabric is different. Summary of the invention

[0003] Based on this, the present invention provides an intelligent printing and dyeing method for fabrics of different thicknesses and fabrics, which can achieve complete printing and dyeing of the same fabric of different thicknesses.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides an intelligent printing and dyeing method for fabrics of different thicknesses, wherein the fabric has a first surface and a second surface opposite to the first surface; the fabric is formed by sequentially connecting fabric blocks with different thicknesses; the same fabric block has the same thickness; and all fabric blocks have the same width; the method comprises the following steps:

[0006] Step 10: Use the first spraying assembly to spray the dye solution onto the first side of the fabric;

[0007] Step 20: using a color sensor to collect color data of the second side of the fabric; the color sensor is located downstream of the first injection assembly;

[0008] Step 30: Control the second jetting assembly to dye the second side of the fabric according to the color data; the second jetting assembly is located downstream of the color sensor.

[0009] As a preferred example, the fabric is conveyed horizontally at a uniform speed under the drive of rollers.

[0010] As a preferred example, the step 30 includes:

[0011] Step 301, establishing a printing and dyeing jet model;

[0012] Step 302, according to the printing and dyeing jet model and the second side color data of the fabric, the jet amount of the second jet component is obtained; if the jet amount is greater than 0, the process proceeds to step 303; if the jet amount is equal to 0, the second jet component is not started;

[0013] Step 303: start the second spraying assembly to spray the dye solution onto the second side of the fabric.

[0014] As a preferred example, the positions of the first spray assembly and the second spray assembly are fixed; the first spray assembly and the second spray assembly share a dye liquid conveying pipeline; and the spraying rate of the first spray assembly is constant.

[0015] As a preferred example, the printing and dyeing jet model is as shown in formula (1):

[0016] Formula (1)

[0017] in, Indicates the injection volume of the second injection assembly, unit: ml; Indicates the preset fabric color depth value; Indicates the color depth value of the fabric block collected by the color sensor; Indicates the thickness of the fabric piece collected by the color sensor, in centimeters; Indicates the length of the fabric piece collected by the color sensor, in centimeters; Indicates the width of the fabric piece collected by the color sensor, in centimeters; Indicates the standard spray volume per unit volume of fabric block, unit: ml / cubic centimeter; .

[0018] As a preferred example, step 10 also includes: using a first roller group to extrude the fabric after the dye is sprayed; the color sensor is located downstream of the first roller group; step 30 also includes: using a second roller group to extrude the fabric after the dye is sprayed; the second roller group is located downstream of the second spraying assembly.

[0019] As a preferred example, the method further comprises a modification treatment: using a third spraying assembly to spray a cationic modifier on the fabric; and then performing a drying treatment; and the fabric washing is omitted in the modification treatment.

[0020] As a preferred example, the method further includes a coloring process: using a fourth spraying assembly to spray a paint diluent on the fabric; then performing a drying process; and omitting washing of the fabric in the coloring process.

[0021] As a preferred example, the modification treatment is performed before step 10 , and the coloring treatment is performed after step 30 .

[0022] In a second aspect, the present invention also provides a fabric treated by any of the above methods.

[0023] Compared with the prior art, the intelligent printing and dyeing method and fabric of the present invention can realize the complete printing and dyeing of the same fabric of different thicknesses, saving dyes. The fabric is formed by connecting fabric blocks of different thicknesses in sequence. The intelligent printing and dyeing method comprises: using a first jet assembly to spray dye liquid on the first side of the fabric; using a color sensor to collect color data of the second side of the fabric; and according to the color data, controlling the second jet assembly to dye the second side of the fabric. Compare the color of the second side of the fabric block collected by the color sensor with the predetermined color to determine whether the fabric block is completely printed and dyed. When the fabric block is not completely printed and dyed, control the second jet assembly to dye the second side of the fabric. The fabric is completely printed and dyed by dyeing the first side of the fabric through the first jet assembly and supplementing the second side of the fabric with the second jet assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0026] The thickness of the same fabric to be printed and dyed is usually the same, but there are also fabrics with different thicknesses. The object of the present invention is the same fabric with different thicknesses. The fabric has a first side and a second side opposite to the first side. The first side is the front side of the fabric, and the second side is the back side of the fabric; or the first side is the back side of the fabric, and the second side is the front side of the fabric. The fabric is formed by connecting fabric blocks with different thicknesses in sequence. The same fabric block has the same thickness and the top surface is rectangular. The width of all fabric blocks is equal.

[0027] like Figure 1 As shown, an embodiment of the present invention provides an intelligent printing and dyeing method for fabrics of different thicknesses, comprising the following steps:

[0028] Step 10: Use the first spraying assembly to spray the dye solution onto the first side of the fabric;

[0029] Step 20: using a color sensor to collect color data of the second side of the fabric; the color sensor is located downstream of the first injection assembly;

[0030] Step 30: Control the second jetting assembly to dye the second side of the fabric according to the color data; the second jetting assembly is located downstream of the color sensor.

[0031] In this embodiment, the fabric to be printed and dyed has different thicknesses at different parts. The dye liquid is sprayed on the first side of the fabric by the first jet assembly. If the thickness of the fabric block is thin, the first jet assembly can complete the complete printing and dyeing of the fabric block. If the thickness of the fabric block is thick, the first jet assembly cannot complete the complete printing and dyeing of the fabric block. To determine whether the fabric block is completely printed and dyed, a color sensor is used for determination. After the first jet assembly sprays the dye liquid on the first side of the fabric block, if it is completely printed and dyed, the color of the second side of the fabric block is the same as the color of the first side, and both are the same as the predetermined color, which meets the printing and dyeing requirements; if it is not completely printed and dyed, the color of the second side of the fabric block is the same as the color of the first side, which does not meet the printing and dyeing requirements. In advance, a predetermined color is set. The predetermined color is the surface color of the fabric block after it is completely printed and dyed. The color of the second side of the fabric block collected by the color sensor is compared with the predetermined color to determine whether the fabric block is completely printed and dyed. When the fabric block is not completely printed and dyed, the second jet assembly is controlled to dye the second side of the fabric. The second jet assembly is used to supplement the dyeing of the second side of the fabric so that the fabric is completely printed and dyed.

[0032] In this embodiment, the injection rate of the first injection assembly is a constant value. In order to save the amount of dye, the amount of dye injected by the first injection assembly allows the thinnest fabric piece to be completely printed and dyed. The thicker fabric piece is completely printed and dyed based on the injection of the first injection assembly and the supplementary injection of the second injection assembly. The amount of dye injected by the second injection assembly can be adjusted according to the thickness of the fabric piece.

[0033] Preferably, the fabric is conveyed horizontally at a uniform speed under the drive of the roller. Preferably, the first injection assembly is located below the fabric; and the second injection assembly is located above the fabric. The rollers include at least a first roller and a second roller, and the fabric is wound around the first roller and the second roller. Driven by the second roller, the fabric is unwound from the first roller and gradually wound around the second roller. In the process of the fabric being unwound from the first roller and wound around the second roller, printing and dyeing of the fabric is achieved. The fabric is conveyed at a uniform speed, which is conducive to controlling the injection of the first injection assembly and the second injection assembly. In the process of fabric printing and dyeing, this embodiment automatically changes the injection amount of the second injection assembly according to the thickness of the fabric, so as to achieve complete and sufficient printing and dyeing of the fabric and avoid the phenomenon of insufficient local printing and dyeing of the fabric.

[0034] Preferably, the step 30 comprises:

[0035] Step 301, establish a printing and dyeing jet model. The printing and dyeing jet model is used to control the jet amount of the second jet assembly. Since the thickness of the fabric blocks in this embodiment is inconsistent, in order to achieve complete printing and dyeing of fabric blocks of different thicknesses, the printing and dyeing jet model is set to achieve complete printing and dyeing of the fabric blocks using the second jet assembly. The printing and dyeing jet model is shown in formula (1):

[0036] Formula (1)

[0037] in, Indicates the injection volume of the second injection assembly, unit: ml; Indicates the preset fabric color depth value, without unit; Indicates the color depth value of the fabric block collected by the color sensor, without unit; Indicates the thickness of the fabric piece collected by the color sensor, in centimeters; Indicates the length of the fabric piece collected by the color sensor, in centimeters; Indicates the width of the fabric piece collected by the color sensor, in centimeters; Indicates the standard spray volume per unit volume of fabric block, unit: ml / cubic centimeter; . The standard injection amount per unit volume of the fabric block is the injection amount per unit volume of the fabric block when the preset fabric color depth value is reached. The fabric block color depth value refers to the depth of the same color of the fabric block represented by a numerical value. Generally, the larger the value, the darker the color. According to the process requirements, the fabric block color depth value is preset. For example, the preset fabric color is red. The red color is set to 10 levels from light to dark, and each level corresponds to a color depth value, which are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 respectively. The color depth value and the corresponding color information are stored in the system. The thickness of the fabric block is 0.1 cm, the length is 100 cm, and the width is 80 cm. The preset fabric color depth value is 8, the fabric block color depth value collected by the color sensor is 4, and the standard injection amount per unit volume of the fabric block is 1 ml / cm3. It can be seen from formula (1) that the injection amount of the second injection component to the fabric block is 400 ml.

[0038] For the same fabric, the preset fabric color depth value is fixed. Preferably, the preset fabric color depth values ​​of different fabric blocks are the same. Since the thickness of different fabric blocks is different, the color depth values ​​of each fabric block collected by the color sensor are different.

[0039] In this embodiment, the preset fabric color depth value is greater than or equal to the fabric block color depth value collected by the color sensor. When the preset fabric color depth value is equal to the fabric block color depth value collected by the color sensor, the injection amount of the second injection assembly is 0, the color depth value of the second side of the fabric meets the requirements, and the second injection assembly does not need to be started. When the preset fabric color depth value is greater than the fabric block color depth value collected by the color sensor, the injection amount of the second injection assembly is greater than 0, the color depth value of the second side of the fabric does not reach the preset fabric color depth value, and the second injection assembly needs to be started to supplement the second side of the fabric with dye liquid so that it reaches the preset fabric color depth value. In this embodiment, the second injection assembly supplements the second side of the fabric block with dye liquid to achieve complete printing and dyeing of the fabric block and reach the preset fabric color depth value.

[0040] Step 302, according to the printing and dyeing jet model and the second side color data of the fabric, the jet amount of the second jet component is obtained; if the jet amount is greater than 0, the process proceeds to step 303; if the jet amount is equal to 0, the second jet component is not started.

[0041] Step 303: start the second spraying assembly to spray the dye solution onto the second side of the fabric.

[0042] Due to the inconsistent thickness of the fabric, the color depth of the second side of the fabric is inconsistent after the first side of the fabric is printed and dyed by the first jet assembly. Based on the different thicknesses of different fabric blocks, the colors of the first sides of different fabric blocks are basically the same, but the colors of the second sides of different fabric blocks are different. The color depth value of the second side of the fabric is collected by a color sensor. By identifying the color depth value of the second side of the fabric block, the amount of additional spraying of the fabric block by the second jet assembly is obtained, so that after the second jet assembly supplements the spraying of the second side of the fabric block, the fabric block can be completely printed and dyed.

[0043] In this preferred example, the jetting amount of the second jetting component is obtained according to the printing and dyeing jetting model and the color data of the second side of the fabric. The second jetting component prints and dyes the second side of the fabric according to the jetting amount. This method sprays dyes on demand, which can save dye usage, avoid wasting dyes, and cause environmental pollution.

[0044] In this preferred example, the thickness of the same fabric block is the same, so after the first injection assembly sprays the dye, the color of the second surface of the fabric block is basically the same. The color sensor only needs to collect the color of any point position on the second surface of the fabric block. Preferably, to improve the accuracy, the color sensor collects the color of any point position in the upstream, midstream and downstream parts of the second surface of the same fabric block, and takes the average as the color depth value. Preferably, to improve the work efficiency, the color sensor collects the color of any point position in the upstream of the second surface of the same fabric block, and takes the average as the color depth value. The color sensor first collects the color of the upstream part of the same fabric block. Based on the similar colors on the second surface of the same fabric block, the color sensor only collects the color of any point position in the upstream part of the second surface of the same fabric block, and takes the average as the color depth value, and does not collect the color of any point in the midstream and downstream parts of the same fabric block, thereby improving the work efficiency. Preferably, the first surfaces of all fabric blocks are located on the same plane. The distance between the first injection assembly and the first surfaces of all fabric blocks is equal, so that after spraying, the first surface of the fabric keeps the same color. There are color differences on the second surfaces of different fabric blocks.

[0045] Preferably, the first jet assembly and the second jet assembly are fixed in position. During operation, only the jetting rates of the first jet assembly and the second jet assembly need to be adjusted, and their positions do not need to be adjusted. This facilitates the control of the operation of the first jet assembly and the second jet assembly. The first jet assembly and the second jet assembly share a dye delivery pipeline. The second jet assembly is used to supplement the second side of the fabric with dye. When the first jet assembly and the second jet assembly share a dye delivery pipeline, the dye sources of the first jet assembly and the second jet assembly are consistent, so that the dye components sprayed by the two are consistent, the printing and dyeing effects are the same, and the color difference between the first side and the second side of the fabric is avoided. Preferably, the jetting rate of the first jet assembly is constant. The preset jetting rate of the first jet assembly can make the thinnest fabric block in the same fabric be completely printed and dyed, and the color depth value of the thinnest fabric block is the preset fabric color depth value. In this way, for the thinnest fabric block, there is no need to start the second jet assembly. For a fabric block with a thickness greater than the thinnest fabric block, the second jet assembly is started to supplement the dyeing liquid to achieve complete printing and dyeing of the fabric block. This process minimizes the amount of dye liquid used. In this process, the preset fabric color depth value will not be less than the fabric block color depth value collected by the color sensor.

[0046] Preferably, step 10 further comprises: using a first roller group to squeeze the fabric after the dye liquid is sprayed. By squeezing the fabric after the dye liquid is sprayed, the dye liquid flows in the fabric and the printing and dyeing efficiency is accelerated. The color sensor is located downstream of the first roller group. Due to the provision of the first roller group, the fabric after the dye liquid is sprayed is squeezed, so that the color data of the second surface of the fabric block collected by the color sensor is more accurate.

[0047] Preferably, step 30 further comprises: using a second roller group to squeeze the fabric after the dye liquid is sprayed; the second roller group is located downstream of the second spraying assembly. By squeezing the fabric after the dye liquid is sprayed, the dye liquid flows in the fabric and the printing and dyeing efficiency is increased.

[0048] Preferably, the method further comprises a modification treatment: using a third spray assembly to spray a cationic modifier on the fabric; and then performing a drying treatment. Cationic modifiers are prior art, for example, quaternary ammonium salts, fatty amines, ureas, acetals and other cationic modifiers can be used. The fabric is modified by spraying a cationic modifier on the fabric. Preferably, the front of the fabric is sprayed with a cationic modifier. Of course, the front and back of the fabric can also be sprayed with a cationic modifier. Spraying and dyeing the modified fabric can improve color fastness and improve the adhesion between the fabric and the coating. Specifically speaking of the printing and dyeing effect, the dyeing effect will be improved. By modifying the fabric, functional groups are added to the fabric, which is similar to increasing the roughness of the fabric, so that the color fastness and the adhesion between the fabric and the coating are increased during the subsequent dyeing or coloring steps.

[0049] The fabric washing is omitted during the modification process. The traditional modification method is to soak the fabric in a modification solution, and modify the fabric under a certain temperature and time, as well as the synergistic effect of other conditions. However, after the fabric is taken out of the modification solution, there will be excess modifier on the fabric. Generally, it is necessary to squeeze the excess modifier out of the fabric through a roller, and then go through a water washing process to clean the fiber debris or other reagents remaining on the surface of the fabric to keep the fabric clean, and then dry it for the next step of processing. The method of the present application omits the water washing step during the modification process. This is because the present application utilizes a third spray assembly to spray the cationic modifier on the fabric, and supplies the cationic modifier in quantity to avoid excess cationic modifier on the fabric.

[0050] The modification treatment can be performed after step 30. Preferably, the modification treatment is performed before step 10. Modifying the fabric before printing and dyeing is beneficial to improving the dyeing effect. After modification, the surface physical morphology of the components of the fabric will change, and new functional groups will be generated, so that the fabric will have new functions, such as hydrophilic or lipophilic. After modification, spraying the dye will increase the connection between the dye and the fabric surface, as well as the functional groups on the molecular chain inside the fiber, improving the dyeing effect and color fastness.

[0051] The method further comprises a coloring process: using the fourth spraying assembly to spray the coating dilution on the fabric; and then performing a drying process. Preferably, the coating dilution is sprayed on the front side of the fabric. Of course, the coating dilution can also be sprayed on both the front side and the back side of the fabric.

[0052] The fabric washing is omitted in the coloring process. The prior art uses the method of dipping or soaking the fabric in the paint diluent, or rolling the paint diluent with a roller brush to achieve coloring. Regardless of the method, there will be residual paint diluent on the surface of the fabric, including some solid paint, fiber debris and other impurities. In the subsequent process, these excess paints and various impurities must be washed away by water to keep the surface of the fabric clean. The method of the present application omits the water washing step during the coloring process. This is because the present application uses the fourth spray component to spray the paint diluent on the fabric, and the paint diluent is supplied in quantity to avoid excess paint diluent on the fabric. The mass concentration of the paint diluent is 0.5-20%. The paint is sprayed on the fabric and dried to form a paint layer. A physical and chemical bond is formed between the paint layer and the fabric. The modification treatment is a pretreatment of the fabric to increase the specific surface area of ​​the fabric. Generally speaking, the larger the specific surface area, the larger the contact surface between the fabric and the paint, thereby achieving an improved bonding effect between the paint and the fabric. This bonding effect can be physical bonding or chemical bonding, such as interaction between functional groups.

[0053] In the above steps, the drying process is: using a nozzle to spray air toward the first side and the second side of the fabric to dry. Preferably, the nozzle is relatively arranged on both sides of the fabric. Using the nozzle to spray air toward the first side and the second side of the fabric at the same time to dry. This greatly improves the drying efficiency.

[0054] In the above method, the cationic modifier does not contain an adhesive, and the paint diluent does not contain an adhesive. When the fabric is being painted, if no adhesive is added, the paint layer on the surface of the fabric and the fabric will be delaminated and peeled off over time. However, after the cationic modification, it is equivalent to roughening the fabric, which increases the adhesion between the paint layer and the fabric. This eliminates the need to use an adhesive. In addition, during the modification treatment, new functional groups are added to the fabric; during the coloring treatment, the new functional groups and the functional groups of the paint produce an interactive force. These will improve the adhesion between the paint layer and the fabric. Therefore, without using an adhesive, this embodiment can still achieve a good adhesion effect.

[0055] The above-mentioned modification treatment and coloring treatment can be carried out before step 10, or after step 30. Preferably, the modification treatment is carried out before step 10, and the coloring treatment is carried out after step 30. The modification treatment is first carried out, then the jet dyeing is carried out, and finally the coloring treatment is carried out. After the modification treatment, the specific surface area of ​​the fabric increases, or the fabric produces the required functional groups after the modification. In this way, after the subsequent dyeing treatment, the dyeing effect is improved. In particular, by adopting the spraying method, whether it is a cationic modifier, a coating or a dye, it can be quantitatively supplied according to the demand, so as to make the best use of materials without waste, realize low-carbon production, and save energy and increase efficiency. In theory, this embodiment can achieve zero loss and zero pollution.

[0056] The embodiment of the present invention also provides a fabric treated by the above method. The fabric is formed by sequentially connecting fabric blocks with different thicknesses. The same fabric block has the same thickness and the top surface is rectangular. The widths of all fabric blocks are equal. After the fabric is treated by the above method, there is no color difference between the first surface and the second surface.

[0057] The above is only a preferred embodiment of the present invention. It should be noted that those skilled in the art will realize that the above specific embodiments are only illustrative and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made by those skilled in the art under the guidance of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent printing and dyeing method for fabrics of different thicknesses, characterized in that: The fabric has a first surface and a second surface opposite to the first surface; the fabric is formed by sequentially connecting fabric blocks with different thicknesses; the same fabric block has the same thickness; all fabric blocks have the same width; the method comprises the following steps: Step 10: Use the first spraying assembly to spray the dye solution onto the first side of the fabric; Step 20: using a color sensor to collect color data of the second side of the fabric; the color sensor is located downstream of the first injection assembly; Step 30: Control the second jetting assembly to dye the second side of the fabric according to the color data; the second jetting assembly is located downstream of the color sensor; The step 30 comprises: Step 301, establish a printing and dyeing jet model; the printing and dyeing jet model is shown in formula (1): Formula (1) in, Indicates the injection volume of the second injection assembly, unit: ml; Indicates the preset fabric color depth value; Indicates the color depth value of the fabric block collected by the color sensor; Indicates the thickness of the fabric piece collected by the color sensor, in centimeters; Indicates the length of the fabric piece collected by the color sensor, in centimeters; Indicates the width of the fabric piece collected by the color sensor, in centimeters; Indicates the standard spray volume per unit volume of fabric block, unit: ml / cubic centimeter; ; Step 302, according to the printing and dyeing jet model and the second side color data of the fabric, the jet amount of the second jet component is obtained; if the jet amount is greater than 0, the process proceeds to step 303; if the jet amount is equal to 0, the second jet component is not started; Step 303: start the second spraying assembly to spray the dye solution onto the second side of the fabric.

2. The method according to claim 1, characterized in that The fabric is conveyed horizontally at a uniform speed under the drive of rollers.

3. The method according to claim 1, characterized in that The positions of the first spray assembly and the second spray assembly are fixed; the first spray assembly and the second spray assembly share a dye liquid conveying pipeline; and the spraying rate of the first spray assembly is constant.

4. The method according to claim 1, characterized in that The step 10 also includes: using a first roller group to squeeze the fabric after the dye solution is sprayed; The color sensor is located downstream of the first roller group; The step 30 also includes: using a second roller group to extrude the fabric after the dye solution is sprayed; the second roller group is located downstream of the second spraying assembly.

5. The method according to claim 1, characterized in that Also includes modification processing: The cationic modifier is sprayed on the fabric by using the third spraying assembly, and then a drying treatment is performed; and water washing of the fabric is omitted in the modification treatment.

6. The method according to claim 5, characterized in that Also includes coloring: The fourth spraying assembly is used to spray the coating dilution liquid on the fabric, and then a drying process is performed; and the fabric washing is omitted in the coloring process.

7. The method according to claim 6, characterized in that The modification treatment is performed before step 10 , and the coloring treatment is performed after step 30 .

8. A fabric treated by the method according to any one of claims 1 to 7.

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