Textile digital disperse printing on-line color development system and process

Abstract

The invention provides a textile digital disperse printing online color development system and a textile digital disperse printing online color development process, the textile digital disperse printing online color development system comprises a cloth preprocessor, a digital disperse printing machine, a cloth storage device, a drying oven, a water washing machine and a shaping dryer which sequentially form a production line in the cloth conveying direction, the cloth storage device comprises a cloth storage rack, and the cloth storage rack is provided with an upper plane; a traction chain is installed on the upper plane of the cloth storage rack and surrounds the cloth storage rack to form a ring, a plurality of turning gears are installed on the cloth storage rack, a driving motor used for driving the traction chain to move is installed on the cloth storage rack, and a cloth inlet guide wheel and a cloth outlet guide wheel are arranged at the two ends of the cloth storage rack in the cloth conveying direction respectively. The traction chain is provided with a plurality of cloth guide rods which are arranged in parallel at intervals. Through the arrangement, the loss of printing processing 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 an online color development system and process for digital dispersed printing of textiles. Background Art

[0002] Digital printing technology is a printing processing method that can effectively improve printing efficiency. Because it does not require color separation and plate making, and has no restrictions on the number of colors and the size of pattern cycles, it has been greatly developed in recent years and has even replaced traditional screen printing in some subdivided printing fields.

[0003] Digital disperse printing is a type of mixed liquid obtained by compounding disperse dyes as the colorant component of ink. It is mainly used for digital printing processing of polyester, acetate fiber and some nylon fabrics. Since disperse dyes have poor water solubility, the content of co-solvent in the ink is relatively high. At present, the nozzles used in digital disperse printing are mainly piezoelectric nozzles with small nozzles. In order to ensure that the ink will not dry quickly in the ink path during the printing process and when the machine is stopped, a large amount of moisturizer is usually added to the ink. Moisturizers are generally alcohol substances, which have a higher boiling point than water and have extremely high hygroscopicity.

[0004] During the digital printing process, a large amount of moisturizer is sprayed onto the fabric surface, so a lot of moisturizer remains on the fabric surface. The moisturizer residue on the fabric surface can easily cause the fabric to absorb moisture after initial drying after printing, and the fabric surface will be scratched and stained during storage, before and during the subsequent color development process, which cannot be removed in the subsequent cleaning process, resulting in printing defects on the fabric surface.

[0005] To solve the above problems, the general solutions are: 1. Reduce the amount of moisturizer in the dispersed ink or use a low-boiling point moisturizer, so that the moisturizer residue can be removed as much as possible during the drying process to prevent the fabric from getting damp after drying; 2. Roll the fabric after printing and drying, and add backing paper during the rolling process to prevent color staining during storage and transfer; 3. Reduce the air volume or lower the loop height during the color development process to reduce the risk of scratches; 4. Use online continuous color development to directly color the printed fabric to solve the problem of color staining on the fabric caused by the moisture regain of the moisturizer on the fabric. However, the first three methods cannot fundamentally solve the problem of color staining of printed fabrics. The main reasons are: due to the structural limitations of the nozzle, the moisturizer in the dispersed ink cannot be significantly reduced, otherwise it will affect the state of the print nozzle and cause risks such as ink breakage and nozzle clogging; the moisturizing effect of low-boiling point moisturizers is poor and cannot effectively solve the problem of blockage caused by too fast drying of ink in the nozzle; after the printing is dried, the backing paper is added and rolled, and the backing paper can only be used once, which will increase the cost and reduce the efficiency; and reducing the air volume and loop height during the color development process will also reduce the processing efficiency. After digital printing, direct color development also has certain risks.

[0006] For example, CN 116901592 A discloses a one-step process of digital printing and hanging drying of fabrics, which can integrate sizing, digital printing, drying and color development. However, during the digital printing process, the fabric surface has poor adhesion to the guide belt, or there are problems with protrusions, seam head position or hairiness on the fabric surface, which will scratch the nozzle, affecting the printing effect and the service life of the equipment, and sudden abnormalities during the printing process, so there is a problem of printing downtime during the printing process. The suspension of printing will cause the fabric that has entered the oven to stay in the oven for an uncontrollable time, resulting in color abnormalities, which will cause great losses to the printing process. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention proposes an online color development system and process for digital dispersed printing of textiles, which is beneficial to reducing the loss of printing processing and improving the production efficiency of digital printing.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] In the first aspect, the present invention provides an online color development system for digital disperse printing of textiles, comprising a fabric preprocessor, a digital disperse printing machine, a fabric storage device, an oven, a washing machine and a shaping and drying machine which sequentially form a production line along the fabric transmission direction, the fabric storage device comprising a fabric storage rack, the fabric storage rack being provided with an upper plane, the upper plane of the fabric storage rack being provided with a traction chain, and the traction chain being looped around the fabric storage rack, the fabric storage rack being provided with a plurality of direction-changing gears for cooperating with the steering of the traction chain, the fabric storage rack being provided with a driving motor for driving the traction chain to move along the fabric transmission direction, the fabric storage rack being provided with a fabric inlet guide wheel and a fabric outlet guide wheel at both ends of the fabric storage rack along the fabric transmission direction, the traction chain being provided with a plurality of fabric guide rods for driving the fabric to move, and the plurality of fabric guide rods being arranged in parallel and at intervals.

[0010] With the above technical solution, first, the fabric enters the fabric preprocessor along the production line for fabric preprocessing, the pretreated fabric is printed by the digital disperse printing machine, and then the printed fabric enters the fabric guide rod of the fabric storage device from the fabric feed guide wheel, and the traction chain drives the fabric guide rod to move in the transmission direction of the fabric, so that the fabric guide rod drives the printed fabric to move in the transmission direction. At this time, the fabric between adjacent fabric guide rods falls into a loop under the action of gravity, so that the digitally printed fabric is stored in the fabric storage rack, and then the printed fabric enters the drying oven from the fabric storage device for color development, and the fabric after color development is washed by the washing machine, and finally the washed fabric enters the shaping drying oven The fabric is dried and shaped in the dryer to complete the printing process; when the digital dispersed printing machine suddenly stops abnormally, the fabric in the digital dispersed printing machine can be cut off in time, and the fabric storage device can continue to provide fabric to the oven, reducing the uncontrollable residence time of the fabric that has entered the oven due to the shutdown of the digital dispersed printing machine, thereby causing abnormal fabric color, which is beneficial to reduce the loss of printing processing; at the same time, through the use of the fabric storage device, the interruption of fabric transmission caused by the shutdown of the digital dispersed printing machine can be reduced, the continuous transmission of fabric is guaranteed, and the production efficiency is improved; in addition, the fabric storage device can temporarily store the printed fabric without scratching or staining the printed surface.

[0011] Preferably, the cloth storage rack is further provided with a bottom supporting guide belt for supporting the cloth, the bottom supporting guide belt is at the bottom of the inner part of the annular ring formed by the traction chain, the bottom supporting guide belt is used to support the bottom end of the cloth forming a loop between adjacent cloth guide rods, the bottom supporting guide belt has the same moving direction and moving speed as the cloth guide rod, and the moving speed of the cloth in the cloth storage device is consistent with the moving speed of the cloth in the oven.

[0012] By adopting the above technical scheme, the bottom support guide belt can support the bottom end of the looped fabric, so that the bottom end of the looped fabric between adjacent fabric guide rods maintains a certain distance from the bottom of the fabric storage frame, which can effectively reduce the situation where the bottom of the fabric is contaminated by contact with the frame, thereby ensuring the printing quality; at the same time, the travel direction and travel speed of the bottom support guide belt are consistent with those of the fabric guide rod, and the travel speed of the fabric in the fabric storage device is consistent with the travel speed of the fabric in the oven, so that the looped fabric can remain in a vertical downward state during the transmission process, reducing the situation where the adjacent looped fabrics are contaminated with each other due to the tilt of the looped fabric.

[0013] Preferably, the length of the cloth guide rod is 1.5m-4m, and the spacing between adjacent cloth guide rods is 0.1-1m; preferably, the length of the cloth guide rod is 1.6m-2m, and the spacing between adjacent cloth guide rods is 0.3-6m.

[0014] By adopting the above technical solution, by setting cloth guide rods of specific length and spacing, the transmission and position of the cloth can be effectively controlled, and the deviation or dislocation of the cloth during the printing process can be reduced.

[0015] Preferably, the surface of the cloth guide rod has a certain degree of roughness, and the surface of the cloth guide rod is coated with one or more of foam rubber, a brush, and a textile with a rough surface.

[0016] By adopting the above technical solution, the roughness of the surface of the cloth guide rod increases the friction between the cloth guide rod and the cloth, so as to ensure that the friction between the cloth guide rod and the cloth can peel the printed cloth from the guide belt in the digital disperse printing machine.

[0017] Preferably, the digital dispersed printing machine is one of a piezoelectric nozzle digital printing machine, a thermal foaming nozzle digital printing machine, and a needle nozzle digital printing machine.

[0018] By adopting the above technical solution, the type of setting of the digital disperse printing machine can achieve more efficient printing effect and better color fixing effect.

[0019] In a second aspect, the present invention provides a textile digital disperse printing online color development process based on a textile digital disperse printing online color development system, which adopts the following technical solution:

[0020] A textile digital disperse printing online color development process, comprising the following steps:

[0021] Step S1, placing the fabric into a fabric preprocessor for pretreatment such as sizing;

[0022] Step S2, the pretreated fabric enters a digital dispersed printing machine for direct inkjet printing, and the printed pattern is directly printed on the fabric surface;

[0023] Step S3, the printed fabric enters a fabric storage device for storage;

[0024] Step S4, the fabric enters the oven after passing through the fabric storage device and is placed flat in the oven, and then the fabric is subjected to heat-melting coloring to complete the coloring process;

[0025] Step S5, the colored cloth is put into a washing machine for washing;

[0026] Step S6, the cloth is washed and then put into a shaping dryer for shaping, thus completing the printing process;

[0027] In the steps S1 to S6, the fabric is a conventional dispersed printing base fabric, and the fabric is composed of one of polyester, acetate fabric, and blended or interwoven fabrics with other fibers;

[0028] In the step S1, the fabric preprocessor applies sizing to the fabric by one of the application methods selected from the group consisting of padding, coating and rotary screen.

[0029] By adopting the above technical scheme, the steps of the online color development process of digital disperse printing on textiles are planned and designed in detail, which ensures the smooth progress of the printing process and can effectively solve the color staining problem caused by the technical path of drying, evaporation, color development, washing and shaping after conventional disperse digital printing; the printed fabric stays in the fabric storage device, which can increase the penetration of ink in the fabric, thereby increasing the dye penetration of the print and making the printed color more saturated and transparent; in addition, the fabric pre-processor uses sizing treatment such as padding and coating to improve the printing effect and color fixing effect.

[0030] Preferably, in step S1, the printing base paste is one or more of a cationic polymer, a high molecular nonionic polymer, and an inorganic salt, and the printing base paste is used to prevent the ink printed on the cloth from bleeding; the amount of the printing base paste in the slurry is 0.2 to 8.0% wt, preferably, the amount of the printing base paste in the slurry is 1.0 to 5.0% wt.

[0031] By adopting the above technical solution, by using one or a combination of materials such as cationic polymers, high molecular nonionic polymers, inorganic salts, etc. as printing base paste, the printing effect and color fixing effect can be improved. In addition, controlling the amount of printing base paste within the range of 0.2 to 8.0%wt can ensure uniform coating and full penetration of the printing base paste, thereby improving the printing quality and color durability.

[0032] Preferably, in step S2, before the pretreated fabric enters the digital disperse printing machine for direct inkjet printing, the guide belt in the digital disperse printing machine is adjusted so that the pretreated fabric is closely attached to the guide belt in the digital disperse printing machine.

[0033] By adopting the above technical solution, the guide belt in the digital dispersed printing machine is adjusted to make the contact between the cloth and the guide belt closer, reducing the displacement or wrinkling of the color-producing cloth during the printing process, thereby ensuring the quality and accuracy of the printing effect.

[0034] Preferably, in step S4, the color development time and color development temperature of the oven are set according to the speed of the digital disperse printing machine, the color development temperature of the oven is 150-240°C, and the color development time of the oven is 2-10 minutes. Preferably, the color development temperature of the oven is 165-200°C, and the color development time of the oven is 3-8 minutes.

[0035] By adopting the above technical solution and setting the color development time and color development temperature of the oven according to the printing speed of the digital disperse printing machine, the color development speed and efficiency of the fabric during the printing process can be effectively improved, ensuring that the fabric is fully colored and quickly cured in the oven, thereby speeding up the production cycle and improving production efficiency; at the same time, by reasonably setting the color development parameters of the oven according to the printing speed of the digital disperse printing machine, such as the color development temperature and color development time, the color uniformity and color fastness of the fabric can be ensured, the occurrence of insufficient or excessive color development can be reduced, and the printing quality and consistency can be improved.

[0036] Preferably, in step S4, the cloth storage device is observed when the cloth is hot-melt coloring. When it is observed that the cloth in the cloth storage device is less than 50% of the cloth storage capacity of the cloth storage device, the coloring temperature of the oven is lowered, and the travel speed of the cloth storage device and the cloth in the oven is lowered so that the cloth in the cloth storage device is maintained at 50% to 80% of the cloth storage capacity of the cloth storage device; when it is observed that the cloth in the cloth storage device is greater than 80% of the cloth storage capacity of the cloth storage device, the travel speed of the cloth storage device and the cloth in the oven is adjusted to be consistent with the printing speed of the digital disperse printing machine, and the coloring temperature of the oven is increased.

[0037] By adopting the above technical solution, the amount of cloth in the cloth storage device is observed in real time, and the color development temperature of the oven and the cloth travel speed are adjusted according to the observation results, so that the cloth is kept within a certain capacity range of the cloth storage device, thereby reducing the occurrence of too little or too much cloth stored in the cloth storage device.

[0038] In summary, the device of the present invention has the following beneficial effects:

[0039] 1. It can effectively solve the color staining problem caused by the technical path of drying, evaporation, washing and shaping after conventional disperse digital printing, and also reduce the problem of color instability caused by downtime caused by online hot melt color development, which can greatly improve the quality and production efficiency of digital disperse printing products.

[0040] 2. The printed fabric stays in the fabric storage device, which can increase the penetration of ink into the fabric, thereby increasing the permeability of the printing and making the printed color more saturated and transparent.

[0041] 3. It solves the inefficiency caused by the need to pre-dry the printed fabrics before coloring in the traditional technical solution, and the quality problems caused by transfer and storage. It is easy to operate and practical, and is especially suitable for small-scale quick-reverse processing of digital printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the overall structure of an online color development system for digital disperse printing of textiles according to the present invention;

[0044] Figure 2 This is a schematic diagram of the internal structure of a cloth storage device in an online color development system for digital disperse printing of textiles according to the present invention;

[0045] Figure ID:

[0046] 1. Pre-processor; 11. Sizing machine; 12. Slurry drying machine; 2. Digital disperse printing machine; 3. Cloth storage device; 31. Cloth storage rack; 32. Cloth inlet guide wheel; 33. Cloth outlet guide wheel; 34. Traction chain; 35. Cloth guide rod; 36. Driving motor; 37. Bottom guide belt; 38. Reversing gear; 39. Motion motor; 4. Oven; 5. Washing machine; 6. Forming drying machine. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Example 1

[0051] See also Figure 1 as well as Figure 2 Embodiment 1 of the present invention discloses an online color development system for digital dispersed printing of textiles, comprising a fabric preprocessor 1, a digital dispersed printing machine 2, a fabric storage device 3, an oven 4, a washing machine 5, and a shaping and drying machine 6, which sequentially form a production line along the fabric transmission direction. The fabric storage device 3 comprises a fabric storage rack 31, and the fabric storage rack 31 is provided with an upper plane. A traction chain 34 is installed on the upper plane of the fabric storage rack 31, and the traction chain 34 surrounds the fabric storage rack 31 to form a ring. Specifically, the fabric storage rack 31 is a rectangular frame, and the traction chain 34 surrounds the outer periphery of the fabric storage rack 31, and the traction chain 34 is in the shape of a rectangular ring. In this embodiment, two traction chains 34 are provided, and the two traction chains are arranged in parallel.

[0052] The top of the cloth storage rack 31 is respectively provided with a cloth inlet guide wheel 32 and a cloth outlet guide wheel 33 at both ends along the cloth transmission direction, and the cloth inlet guide wheel 32 and the cloth outlet guide wheel 33 are used in conjunction with the cloth storage rack 31. A plurality of direction-changing gears 38 for cooperating with the turning direction of the traction chain 34 are installed in the cloth storage rack 31, and the cloth storage rack 31 is provided with a driving motor 36 for driving the traction chain 34 to move in a loop along the cloth transmission direction. Specifically, the direction-changing gears 38 are set to eight, and the eight direction-changing gears 38 are respectively installed at the turning points of the two traction chains 34, and the direction-changing gears 38 are all meshed with the traction chains 34, and the driving motor 36 is installed at the bottom of the cloth storage rack 31 near the cloth outlet guide wheel 33, and the output shaft of the driving motor 36 is fixedly connected to the shaft hole of one of the direction-changing gears 38 located at the bottom of the cloth storage rack 31 near the cloth outlet guide wheel 33. The traction chain 34 is equipped with multiple cloth guide rods 35 for driving the cloth to move, and the multiple cloth guide rods 35 are arranged in parallel and spaced apart. The cloth guide rod 35 is installed between two traction chains 34. The driving motor 36 drives the changing gear 38 to rotate, thereby driving the traction chain 34 and the cloth guide rod 35 to move.

[0053] The fabric is first pre-processed by the fabric preprocessor 1, and then the pre-processed fabric enters the digital disperse printing machine 2 for printing. The printed fabric enters the fabric storage device 3 from the fabric inlet guide wheel 32, and the driving motor 36 drives the traction chain 34 and the fabric guide rod 35 to move along the fabric conveying direction, and the fabric guide rod 35 drives the printed fabric to move along the fabric conveying direction. At this time, the fabric between adjacent fabric guide rods 35 falls into a loop due to gravity, so that the printed fabric is stored in the fabric storage rack 31, and then the printed fabric in the fabric storage device 3 enters the drying oven 4 through the fabric outlet guide wheel 33 for color development, and the fabric after color development enters the washing machine 5 for washing, and finally the fabric after washing enters the shaping dryer 6 for drying and shaping; the washing water after color development can wash away the unfixed dye, the slurry on the fabric surface and the excess components in the ink, so that the color fastness of the fabric meets the order requirements.

[0054] A bottom guide belt 37 for supporting fabric is installed in the fabric storage rack 31. The bottom guide belt 37 is located at the bottom of the inner ring formed by the traction chain 34. The bottom guide belt 37 is used to support the bottom end of the looped fabric between adjacent fabric guide rods 35. A motion motor 39 for driving the bottom guide belt 37 is also installed in the fabric storage rack 31. In this embodiment, the bottom guide belt 37 is a rubber blanket belt. The height of the looped fabric between adjacent fabric guide rods 35 is not greater than the vertical distance from the fabric guide rod 35 to the bottom guide belt 37. The travel speed of the bottom guide belt 37 is consistent with the travel direction and travel speed of the fabric guide rod 35, and the travel speed of the traction chain 34 is consistent with the travel speed of the fabric in the oven 4, that is, the travel speed of the fabric in the fabric storage device 3 is consistent with the travel speed of the fabric in the oven 4, so as to ensure that the fabric in the fabric storage device 3 does not produce color scratching and staining problems before coloring.

[0055] The length of the cloth guide rod 35 is 1.5m to 4m, and the spacing between adjacent cloth guide rods 35 is 0.1 to 1m; preferably, the length of the cloth guide rod 35 is 1.6m to 2m, and the spacing between adjacent cloth guide rods 35 is 0.3 to 6m. In this embodiment, the diameter of the cloth guide rod 35 is 4.2cm, the length of the cloth guide rod 35 is 1.85m, and the spacing between adjacent cloth guide rods 35 is 0.45m; the cloth storage capacity of the cloth storage device 3 is determined by the number of cloth guide rods 35, the spacing between the cloth guide rods 35, and the height of the cloth hanging down.

[0056] The surfaces of the cloth-in-feed guide wheel 32, the cloth-out-feed guide wheel 33 and the cloth-guide rod 35 all have a certain degree of roughness, which is achieved by coating the surfaces with one or more of foam rubber, brushes, and rough-surfaced textiles. In this embodiment, the surfaces of the cloth-in-feed guide wheel 32, the cloth-out-feed guide wheel 33 and the cloth-guide rod 35 are all coated with brushes. The surfaces of the cloth-in-feed guide wheel 32, the cloth-out-feed guide wheel 33 and the cloth-guide rod 35 are provided with materials that increase the friction between the cloth and the cloth, so as to ensure that the friction between the cloth-in-feed guide wheel 32 and the cloth-guide rod 35 and the cloth can peel the printed cloth from the guide belt of the digital dispersed printing machine 2, and also ensure that the friction between the cloth-out-feed guide wheel 33 and the cloth can bring the cloth from the cloth storage device 3 into the oven 4.

[0057] The fabric preprocessor 1 includes a sizing machine 11 and a slurry dryer 12 which are sequentially arranged along the fabric transmission direction. The sizing machine 11 is one of a padding machine, a coating machine and a rotary screen machine, and the three sizing machines 11 have different ways of sizing the fabric. When the sizing machine is used to pre-treat the fabric, the padding method is used; when the coating machine is used to pre-treat the fabric, the coating method is used; when the rotary screen machine is used to pre-treat the fabric, the rotary screen method is used. In this embodiment, the sizing machine 11 is a coating machine. The slurry dryer 12 is used to dry the fabric after sizing.

[0058] The digital disperse printing machine 2 is a type of piezoelectric nozzle digital printing machine, thermal foaming nozzle digital printing machine, and needle nozzle digital printing machine. In this embodiment, the digital disperse printing machine 2 is a piezoelectric nozzle digital printing machine, and the digital disperse printing machine 2 adopts scanning printing. In some embodiments, the digital disperse printing machine 2 can also adopt single-pass printing.

[0059] The oven 4 is a crawler-type oven and a pin-chain oven, and the oven 4 has a single-layer or multi-layer structure. In the present embodiment, the oven 4 is a crawler-type oven with a single-layer structure.

[0060] The implementation principle of Example 1 is:

[0061] First, the cloth is sizing by the sizing machine 11, and the sizing cloth enters the sizing dryer 12 for drying, completing the pretreatment of the cloth, and then the pretreated cloth is printed by the digital dispersed printing machine 2, and the printed cloth enters the cloth guide rod 35 of the cloth storage device 3 from the cloth feed guide wheel 32. Since the traction chain 34 drives the cloth guide rod 35 to move in the transmission direction of the cloth, the cloth guide rod 35 drives the printed cloth to move in the transmission direction. At this time, the cloth between adjacent cloth guide rods 35 falls into a ring due to the action of gravity, so that the digitally printed cloth is stored in the cloth storage rack 31, and then the printed cloth enters the drying oven 4 from the cloth storage device 3 for coloring, and the cloth after coloring is washed by the washing machine 5. Finally, the washed cloth enters the shaping dryer 6 for drying and shaping, completing the printing process.

[0062] Example 2

[0063] The invention discloses an online color development process for digital disperse printing of textiles, comprising the following steps:

[0064] Step S1, putting the cloth into the cloth preprocessor 1 for sizing preprocessing, the cloth first passes through the sizing machine 11 for sizing, and then the sizing cloth enters the sizing dryer 12 for drying to complete the cloth preprocessing; wherein the cloth is a conventional disperse printing base cloth, and the composition of the cloth is one of polyester, acetate fiber fabric and blended or interwoven fabric with other fibers; the printing base paste is one or more of cationic polymers, high molecular non-ionic polymers, and inorganic salts, and the printing base paste is used to prevent the ink printed on the cloth from penetrating; the amount of the printing base paste in the slurry is 0.2-8.0%wt, preferably, the amount of the printing base paste in the slurry is 1.0-5.0%wt; the cloth preprocessor 1 adopts one of the application methods of padding, coating and rotary screen;

[0065] Step S2, adjusting the guide belt in the digital dispersed printing machine 2 so that the fabric is closely attached to the guide belt in the digital dispersed printing machine 2, and then the pre-treated fabric enters the digital dispersed printing machine 2 for direct printing, and the digital dispersed printing machine 2 prints the printed pattern directly on the fabric surface of the fabric;

[0066] Step S3, the printed cloth enters the cloth storage device 3 for storage;

[0067] Step S4, the fabric enters the oven 4 after passing through the fabric storage device 3, and is placed flat in the oven 4, and then the coloring temperature and coloring time of the oven 4 are adjusted to perform heat-melting coloring on the fabric in the oven 4. The fabric storage device 3 is observed during the heat-melting coloring of the fabric. When it is observed that the fabric in the fabric storage device 3 is less than 50% of the fabric storage amount of the fabric storage device 3, the temperature of the oven 4 is reduced to a coloring temperature that matches the fabric and time corresponding to the oven 4, and the travel speed of the fabric storage device 3 and the oven 4 is reduced to maintain the fabric in the fabric storage device 3 at 50% of the fabric storage amount of the fabric storage device 3 ~80%; when it is observed that the cloth in the cloth storage device 3 is greater than 80% of the cloth storage capacity of the cloth storage device, the traveling speed of the cloth storage device 3 and the oven 4 is adjusted to be consistent with the speed of the digital disperse printing machine 2, and the coloring temperature of the oven 4 is increased to a coloring temperature that matches the cloth and time corresponding to the oven 4 to complete the coloring process; wherein, the coloring temperature of the oven 4 is 150~240℃, and the coloring time of the oven 4 is 2~10 minutes. Preferably, the coloring temperature of the oven 4 is 165~200℃, and the coloring time of the oven 4 is 3~8min.

[0068] Step S5, the colored cloth enters the washing machine 5 for washing;

[0069] Step S6, after washing, the cloth enters the shaping and drying machine 6 for shaping, completing the printing process.

[0070] Application Example 1

[0071] The textile digital disperse printing online color development system in Example 1 and the textile digital disperse printing online color development process in Example 2 are combined to print and color the fabric.

[0072] In this application example, the fabric used is printed white base fabric: 100D chiffon 24T, width 150cm, weight 100g / m 2 , Fabric Content: 100% Polyester.

[0073] The printing base paste is composed of carboxymethyl starch and sodium sulfate, and the slurry is composed of carboxymethyl starch, sodium sulfate and water in a mass ratio of 3:1:96. Carboxymethyl starch was purchased from Guangdong Hongxin Biotechnology Co., Ltd., and sodium sulfate was purchased from Weifang Dakang Chemical Co., Ltd.

[0074] The printing speed of the digital disperse printing machine is 120m / min. The color development temperature of the oven is 195℃, and the color development time of the oven is 4min.

[0075] Application Example 2

[0076] The difference from Application Example 1 is:

[0077] Printed white base fabric: 100D / 144F polyester + 75D spandex, width 165cm, weight 210g / m2, fabric composition: 92% polyester, 8% spandex.

[0078] The printing base paste is a cationic polymer DM-2518, and the paste is composed of a cationic polymer DM-2518 and water in a mass ratio of 4:96. The cationic polymer DM-2518 is purchased from Demei Fine Chemical Co., Ltd.

[0079] The printing speed of the digital disperse printing machine is 100m / min. The color development temperature of the oven is 190℃, and the color development time of the oven is 5min.

[0080] In this application example, the surfaces of the cloth inlet guide wheel, cloth outlet guide wheel and cloth guide rod in the cloth storage device are all covered with foam rubber, the cloth guide rod has a diameter of 5.0 cm, a length of 1.85 m, and a spacing between adjacent cloth guide rods of 0.6 m.

[0081] Comparative application example 1

[0082] The difference from Application Example 1 is that the fabric printed by the digital dispersed printing machine directly enters the oven for hot-melt color development without entering the fabric storage device.

[0083] Comparative Application Example 2

[0084] The difference from Application Example 1 is that the fabric printed by the digital dispersed printing machine directly enters the oven for drying without entering the fabric storage device, and the color development temperature of the oven is 180° C. and the color development time of the oven is 8 minutes.

[0085] Comparative Application Example 3

[0086] The difference from Application Example 2 is that the fabric printed by the digital disperse printing machine directly enters the oven for hot-melt color development without entering the fabric storage device.

[0087] Comparative Application Example 4

[0088] The difference from Application Example 2 is that the fabric printed by the digital dispersed printing machine directly enters the oven for drying without entering the fabric storage device, and the color development temperature of the oven is 185°C and the color development time of the oven is 9 minutes.

[0089] Detection 1

[0090] Color performance comparison test:

[0091] The four color blocks of cyan, red, yellow and black were printed on the fabrics processed by Application Examples 1-2 and Comparative Application Examples 1-4 and printed with prints, and the L, a and b values ​​of the four primary color blocks of cyan, red, yellow and black of Application Examples 1-2 and Comparative Application Examples 1-4 were tested. Then, using Application Example 1 or 2 as a standard, the color difference values ​​ΔE (CMC2:1) between Comparative Application Examples 1-2 and Application Example 1 and the color difference values ​​ΔE (CMC2:1) between Comparative Application Examples 3-4 and Application Example 2 were tested to characterize the difference in color performance between the scheme of the present invention and the conventional process. The test data of Test 1 are detailed in Table 1.

[0092] Detection 2

[0093] Comparative test of fabric staining:

[0094] Patterns of different color combinations were printed on the fabrics processed in Application Examples 1 to 2 and Comparative Application Examples 1 to 4 and printed in large quantities. Four different patterns were found on the finished fabrics after printing, and the same patterns on different fabrics were compared to observe the color staining on the fabrics. The test data of Test 2 is shown in Table 2.

[0095] Detection 3

[0096] Color fastness test:

[0097] ISO 105C06 was used to test the color fastness to washing of the fabrics processed by corresponding examples 1 to 2 and comparative application examples 1 to 4; ISO 105X12 was used to test the color fastness to rubbing of the fabrics processed by corresponding examples 1 to 2 and comparative application examples 1 to 4. The test data of test 3 are shown in Table 3. The results are divided into 5 levels, with level 1 being the worst and level 5 being the best.

[0098] Table 1

[0099]

[0100]

[0101] Table 2

[0102]

[0103] Table 3

[0104]

[0105]

[0106] From the test results in Table 1, it can be seen that the four primary colors obtained by this scheme are basically consistent with the colors obtained by the conventional process, the color value difference is small, and the overall color difference is not large, which shows that the scheme is feasible and the dye printed on the cloth surface is fully fixed to the fiber.

[0107] From the test results in Table 2, it can be seen that the printed fabric samples obtained by this scheme can significantly reduce the color staining of the fabric surface and effectively improve the fabric surface quality compared with the traditional technical scheme.

[0108] From the test results in Table 3, it can be seen that the color fastness of the finished printed fabric obtained by this scheme is basically consistent with that of the conventional process, and is slightly better than that of the conventional process, indicating that the color is fully developed, and the subsequent washing treatment can wash away the unreacted floating color, without affecting the subsequent wearing performance, and the quality is guaranteed.

Claims

1. A textile digital disperse printing online color development system, characterized in that: The invention comprises a fabric preprocessor (1), a digital dispersed printing machine (2), a fabric storage device (3), an oven (4), a washing machine (5) and a shaping and drying machine (6) which sequentially form a production line along the fabric transmission direction, wherein the fabric storage device (3) comprises a fabric storage rack (31), the fabric storage rack (31) is provided with an upper plane, a traction chain (34) is installed on the upper plane of the fabric storage rack (31), and the traction chain (34) surrounds the fabric storage rack (31) to form a ring, and the fabric storage rack (31) is provided with a plurality of traction chains (34). A plurality of direction-changing gears (38) are installed to cooperate with the traction chain (34) to turn the cloth. The cloth storage frame (31) is installed with a driving motor (36) for driving the traction chain (34) to move along the cloth transmission direction. The cloth storage frame (31) is provided with a cloth inlet guide wheel (32) and a cloth outlet guide wheel (33) at both ends along the cloth transmission direction. The traction chain (34) is installed with a plurality of cloth guide rods (35) for driving the cloth to move. The plurality of cloth guide rods (35) are arranged in parallel and at intervals.

2. The online color development system for digital disperse printing of textiles according to claim 1, characterized in that: The cloth storage frame (31) is also provided with a bottom guide belt (37) for supporting cloth. The bottom guide belt (37) is located at the bottom of the inner part of the annular ring formed by the traction chain (34). The bottom guide belt (37) is used to support the bottom end of the cloth formed in a loop between adjacent cloth guide rods (35). The travel direction and travel speed of the bottom guide belt (37) are consistent with those of the cloth guide rods (35). The travel speed of the cloth in the cloth storage device (3) is consistent with the travel speed of the cloth in the drying oven (4).

3. The online color development system for digital disperse printing of textiles according to claim 1, characterized in that: The length of the cloth guiding rod (35) is 1.5m to 4m, and the spacing between adjacent cloth guiding rods (35) is 0.1 to 1m; preferably, the length of the cloth guiding rod (35) is 1.6m to 2m, and the spacing between adjacent cloth guiding rods (35) is 0.3 to 6m.

4. The online color development system for digital disperse printing of textiles according to claim 1, characterized in that: The surface of the cloth guide rod (35) has a certain degree of roughness, and the surface of the cloth guide rod (35) is covered with one or more of foam rubber, a brush, and a textile with a rough surface.

5. The online color development system for digital disperse printing of textiles according to claim 1, characterized in that: The digital dispersed printing machine (2) is one of a piezoelectric nozzle digital printing machine, a thermal foaming nozzle digital printing machine, and a needle nozzle digital printing machine.

6. A textile digital disperse printing online color development process based on a textile digital disperse printing online color development system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, placing the fabric into a fabric preprocessor (1) for preprocessing such as sizing; Step S2, the pre-treated fabric enters the digital dispersed printing machine (2) for direct printing, and the printed pattern is directly printed on the fabric surface; Step S3, the printed cloth enters the cloth storage device (3) for storage; Step S4, the fabric passes through the fabric storage device (3) and enters the oven (4), and is placed flat in the oven (4), and then the oven (4) performs heat-melting coloring on the fabric to complete the coloring process; Step S5, the colored cloth enters the washing machine (5) for washing; Step S6, after washing, the cloth enters the shaping and drying machine (6) for shaping, completing the printing process; In the steps S1 to S6, the fabric is a conventional dispersed printing base fabric, and the fabric is composed of one of polyester, acetate fabric, and blended or interwoven fabrics with other fibers; In the step S1, the fabric preprocessor (1) applies sizing to the fabric by one of the following application methods: padding, coating and rotary screen.

7. The online color development process for digital disperse printing of textiles according to claim 6, characterized in that: In step S1, the printing base paste is one or more of a cationic polymer, a high molecular nonionic polymer, and an inorganic salt, and the printing base paste is used to prevent the ink printed on the cloth from bleeding; the amount of the printing base paste in the slurry is 0.2 to 8.0% wt, preferably, the amount of the printing base paste in the slurry is 1.0 to 5.0% wt.

8. The online color development process for digital disperse printing of textiles according to claim 6, characterized in that: In the step S2, before the pretreated fabric enters the digital disperse printing machine (2) for direct jet printing, the guide belt in the digital disperse printing machine (2) is adjusted so that the pretreated fabric is attached to the guide belt in the digital disperse printing machine (2).

9. The online color development process for digital disperse printing of textiles according to claim 6, characterized in that: In the step S4, the color development time and the color development temperature of the oven (4) are set according to the printing speed of the digital disperse printing machine (2). The color development temperature of the oven (4) is 150-240° C., and the color development time of the oven (4) is 2-10 minutes. Preferably, the color development temperature of the oven (4) is 165-200° C., and the color development time of the oven (4) is 3-8 minutes.

10. The online color development process for digital disperse printing of textiles according to claim 6, characterized in that: In the step S4, the cloth storage device (3) is observed when the cloth is hot-melt coloring. When it is observed that the cloth in the cloth storage device (3) is less than 50% of the cloth storage amount of the cloth storage device (3), the coloring temperature of the oven (4) is reduced, and the travel speed of the cloth in the cloth storage device (3) and the oven (4) is reduced, so that the cloth in the cloth storage device (3) is maintained at 50% to 80% of the cloth storage amount of the cloth storage device (3); when it is observed that the cloth in the cloth storage device (3) is greater than 80% of the cloth storage amount of the cloth storage device (3), the travel speed of the cloth in the cloth storage device (3) and the oven (4) is adjusted to be consistent with the printing speed of the digital disperse printing machine (2), and the coloring temperature of the oven (4) is increased.

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