A wash-free printing process for polyester fabric using liquid disperse dyes

Abstract

The invention discloses a polyester fabric liquid disperse dye wash-free printing process, specifically relates to the polyester fabric printing technology field, and comprises the following steps: S1, pre-treating the polyester fabric; S2, using a printing machine to spray the liquid disperse dye onto the polyester fabric; S3, drying the printed polyester fabric; S4, shaping the dried polyester fabric; S5, sorting and packaging the shaped polyester fabric. The invention can accelerate the solidification of the liquid disperse dye, prevent the liquid disperse dye from falling off after contacting the nip roller, and avoid the nip roller from affecting the printing effect of the polyester fabric, thereby reducing color difference and infiltration, improving the clarity of the printed pattern and the color saturation, and improving the printing quality.

Description

Technical Field

[0001] The invention relates to the technical field of polyester fabric printing, and more specifically to a wash-free printing process for polyester fabric using liquid disperse dyes. Background Art

[0002] Conventional disperse dye printing process for polyester fabrics: pre-treatment pre-forming → printing → pre-drying → high temperature and high pressure steaming / high temperature baking → washing, reduction washing → stenter drying → finishing / setting → finished product. Washing after the dispersed printing material is fixed is to wash away the floating color, printing paste and auxiliaries, etc., to improve the color and color fastness of the printed products. However, the color water, sewage and wastewater produced by washing are industrial wastewaters that are difficult and must be treated by printing and dyeing enterprises, otherwise it will directly cause ecological pollution, affect the environment, destroy vegetation, endanger and pollute groundwater resources, etc.

[0003] After the printing machine prints liquid disperse dye on polyester fabric, the liquid disperse dye on the polyester fabric cannot dry and solidify quickly, which will cause problems such as dye diffusion and color blur. In addition, the press roller on the printing device of the printing machine may cause the disperse dye to fall off after contacting the press roller during the process of smoothing the polyester fabric, thereby affecting the printing effect and reducing the printing quality.

[0004] The present invention provides a wash-free printing process for polyester fabric using liquid disperse dyes, aiming to solve the problem that the liquid disperse dyes on the polyester fabrics cannot be dried and solidified quickly, resulting in dye diffusion and color blurring, and the disperse dyes fall off after contacting with a nip roller, thereby affecting the printing effect and reducing the printing quality. Summary of the invention

[0005] The object of the present invention is to provide a wash-free printing process for liquid disperse dyes on polyester fabrics, so as to solve the problem proposed in the above-mentioned background technology that the liquid disperse dyes on the polyester fabrics cannot be dried and solidified quickly, resulting in dye diffusion, color blur, and the disperse dyes falling off after contacting the nip roller, thereby affecting the printing effect and reducing the printing quality.

[0006] To achieve the above object, the present invention provides the following technical solution: a polyester fabric liquid disperse dye wash-free printing process, comprising the following steps:

[0007] S1. Pre-treating polyester fabric;

[0008] S2, using a printing machine to spray liquid disperse dye onto polyester fabric;

[0009] S3, drying the printed polyester fabric;

[0010] S4, performing shaping treatment on the polyester fabric after drying treatment;

[0011] S5. Finish and pack the polyester fabric after shaping treatment.

[0012] Preferably, the printing machine includes a frame, a printing device and a conveying device, and also includes: a curing device, the curing device is divided into two groups, symmetrically arranged on both sides of the printing device along the moving direction, and is used to cooperate with the printing device to blow air on the printed polyester fabric during the printing process.

[0013] Preferably, the curing device includes a mounting block fixedly connected to the outer wall of the printing device, the bottom of the mounting block is rotatably connected to a pressure roller, both sides of the mounting block are fixedly connected to a rotating chamber, both ends of the pressure roller shaft are fixedly connected to a turntable, the two turntables are respectively rotatably connected in the two rotating chambers, and the two turntables are eccentrically arranged with the corresponding rotating chambers.

[0014] Preferably, the turntable is provided with a plurality of circumferentially equidistantly distributed limiting grooves, each of the limiting grooves is slidably connected with a rotary vane, an elastic member is connected between each rotary vane and the corresponding limiting groove, and each rotary vane can always be in contact with the inside of the rotating cavity under the support of the corresponding elastic member.

[0015] Preferably, an air collecting chamber is opened inside the mounting block, a connecting chamber is arranged on the top of the air collecting chamber, a piston plate is slidably connected to the inside of the air collecting chamber, a sealing slider slidably connected to the inside of the connecting chamber is fixedly connected to the top of the piston plate, and an air injection groove connected to the air collecting chamber is opened on the side of the bottom of the mounting block close to the printing device.

[0016] Preferably, an air inlet and an air outlet are respectively formed on the outer wall of each rotating chamber, and each of the air outlets is connected to the interior of the air collecting chamber through an air pipe.

[0017] Preferably, a communicating hole communicating with the communicating chamber is provided on the top of the mounting block, and the two communicating holes in the two groups of curing devices are connected through an external pipe.

[0018] Preferably, when the printing device moves to print the polyester fabric, the two pressing rollers in the two groups of curing devices can contact the polyester fabric and rotate synchronously following the movement of the printing device.

[0019] Preferably, when the rotating disk rotates, it can drive the plurality of rotating vanes to slide along the inner wall of the corresponding rotating chamber, and form one or more working chambers with variable volumes.

[0020] Preferably, when the turntable rotates, external air can be drawn into the rotating chamber through the air inlet, and the gas can be transported into the gas collecting chamber through the air outlet and the air pipe.

[0021] Technical effects and advantages of the present invention:

[0022] The present invention arranges a curing device. When the printing device moves left and right to print on the polyester fabric, the piston plate in the left curing device moves upward in the corresponding gas collecting chamber to collect gas, and the piston plate in the right curing device moves downward in the corresponding gas collecting chamber, so that the gas in the right gas collecting chamber is discharged downward through the corresponding air jet slot. Therefore, when the printing device moves left and right to print, one group of the two curing devices can collect gas and the other group can exhaust gas, thereby accelerating the curing of the liquid disperse dye, preventing the liquid disperse dye from falling off after contacting the pressing roller, and avoiding the pressing roller from affecting the printing effect of the polyester fabric, thereby reducing color difference and infiltration, improving the clarity of the printed pattern and the color saturation, and improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a process flow chart of the present invention.

[0024] Figure 2 It is a schematic diagram of the overall structure of the printing machine of the present invention.

[0025] Figure 3 The figure is a schematic diagram of the internal structure of the printing machine of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the curing device of the present invention.

[0027] Figure 5 It is a bottom view of the curing device of the present invention.

[0028] Figure 6 It is a cross-sectional view of the internal structure of the rotating chamber of the present invention.

[0029] Figure 7 For the present invention Figure 6 A-section structure enlarged view.

[0030] Figure 8 This is a cross-sectional view of the internal structure of the mounting block of the present invention.

[0031] Fig. 9 It is a schematic diagram of the cooperation between the pressing roller and the rotating disk of the present invention.

[0032] Fig.10 It is a schematic diagram of the cooperation between the turntable and the rotary vane of the present invention.

[0033] The accompanying drawings are marked as follows: 1, printing machine; 11, frame; 2, printing device; 3, conveying device; 4, curing device; 41, mounting block; 42, pressing roller; 43, rotating chamber; 44, turntable; 45, limiting groove; 46, rotary vane; 47, elastic member; 48, air collecting chamber; 49, connecting chamber; 410, piston plate; 411, sealing slider; 412, air inlet; 413, air outlet; 414, air pipe; 415, connecting hole; 416, jet slot. DETAILED DESCRIPTION

[0034] 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.

[0035] Embodiment 1

[0036] A polyester fabric liquid disperse dye wash-free printing process according to an embodiment of the present invention, such as Figure 1 As shown, the following steps are included:

[0037] S1. Pre-treat the polyester fabric to remove surface impurities and grease to ensure that the dye can be evenly colored;

[0038] S2, using the printing machine 1 to spray the liquid disperse dye onto the polyester fabric, the printing machine 1 sprays the liquid disperse dye onto the fabric through the nozzle to form the desired pattern and color;

[0039] S3, drying the printed polyester fabric to remove excess moisture and some unfixed dyes, which can be done by hot air drying or infrared drying;

[0040] S4. Perform shaping treatment on the polyester fabric after drying to ensure the stability of the pattern and the dimensional stability of the fabric. The shaping is usually carried out under high temperature and high pressure conditions to allow the dye molecules to better penetrate into the fiber;

[0041] S5. Finish and pack the polyester fabric after shaping treatment.

[0042] Embodiment 2

[0043] After the printing machine prints liquid disperse dye on polyester fabric, the liquid disperse dye on the polyester fabric cannot dry and solidify quickly, which will cause problems such as dye diffusion and color blur. In addition, the pressure roller on the printing device of the printing machine may cause the disperse dye to fall off after contacting the pressure roller during the process of smoothing the polyester fabric, thereby affecting the printing effect and reducing the printing quality. Therefore, this embodiment improves the device described in the above embodiment.

[0044] refer to Figure 2 and Figure 3 The printing machine 1 includes a frame 11, a printing device 2 and a conveying device 3.

[0045] refer to Figure 3 , and also includes a curing device 4, which consists of two groups and is symmetrically arranged on both sides of the printing device 2 along the moving direction, and is used to cooperate with the printing device 2 to blow air to the printed polyester fabric during the printing process.

[0046] refer to Figure 2-Figure 10 The curing device 4 includes a mounting block 41 fixedly connected to the outer wall of the printing device 2, a pressing roller 42 is rotatably connected to the bottom of the mounting block 41, a rotating cavity 43 is fixedly connected to both sides of the mounting block 41, and a rotating disk 44 is fixedly connected to both ends of the rotating shaft of the pressing roller 42. The two rotating disks 44 are rotatably connected in the two rotating cavities 43 respectively, and the two rotating disks 44 are eccentrically arranged with the corresponding rotating cavities 43.

[0047] refer to Figure 7 and Fig.10 A plurality of circumferentially equidistantly distributed limiting grooves 45 are provided on the turntable 44, each limiting groove 45 is slidably connected with a rotary vane 46, and an elastic member 47 is connected between each rotary vane 46 and the corresponding limiting groove 45. Each rotary vane 46 can always contact with the inside of the rotating cavity 43 under the support of the corresponding elastic member 47.

[0048] refer to Figure 5 and Figure 8 A gas collecting chamber 48 is provided inside the mounting block 41, a connecting chamber 49 is provided on the top of the gas collecting chamber 48, a piston plate 410 is slidably connected inside the gas collecting chamber 48, a sealing slider 411 slidably connected inside the connecting chamber 49 is fixedly connected to the top of the piston plate 410, an air injection groove 416 connected to the gas collecting chamber 48 is provided on the side of the bottom of the mounting block 41 close to the printing device 2, a connecting hole 415 connected to the connecting chamber 49 is provided on the top of the mounting block 41, and the two connecting holes 415 in the two groups of curing devices 4 are connected through an external pipeline.

[0049] refer to Figure 7The outer wall of each rotating chamber 43 is respectively provided with an air inlet 412 and an air outlet 413 , and each air outlet 413 is connected to the interior of the air collecting chamber 48 through an air pipe 414 .

[0050] When the printing device 2 moves to print the polyester fabric, the two pressing rollers 42 in the two sets of curing devices 4 can contact the polyester fabric and rotate synchronously following the movement of the printing device 2 .

[0051] When the turntable 44 rotates, it can drive multiple vanes 46 to slide along the inner wall of the corresponding rotating chamber 43 and form one or more working chambers with variable volumes. When the turntable 44 rotates, it can draw external gas into the rotating chamber 43 through the air inlet 412, and transport the gas to the gas collecting chamber 48 through the air outlet 413 and the air pipe 414 (the specific working principle can be referred to the vane pump).

[0052] In actual operation, the polyester fabric is first transported to the position to be printed by the conveying device 3, and then the printing device 2 is started to move from left to right to print the polyester fabric. After the printing is completed, the polyester fabric is moved forward again by the conveying device 3, and then the printing device 2 is started to move from right to left to print the polyester fabric again. In this way, the printing of the polyester fabric can be completed. During the reciprocating movement of the printing device 2, the two sets of symmetrically arranged curing devices 4 can be driven to move left and right, so that the two pressing rollers 42 can contact and rotate with the polyester fabric.

[0053] When the printing device 2 moves from left to right to print the polyester fabric, the pressing roller 42 in the curing device 4 on the right will preferentially contact the surface of the polyester fabric, so that the printing device 2 can smooth the polyester fabric through the pressing roller 42 before printing, thereby improving the uniformity of printing and avoiding uneven printing or pattern deformation caused by wrinkles or unevenness of the fabric.

[0054] The pressure roller 42 on the right side will drive the two turntables 44 on both sides to rotate during the rotation process. During the rotation of the two turntables 44, the corresponding multiple rotating vanes 46 will slide along the inner wall of the corresponding rotating chamber 43 under the action of the corresponding elastic parts 47 and centrifugal force, so that the gas in the gas collecting chamber 48 is drawn into the rotating chamber 43 through the air pipe 414 and the air outlet 413, and discharged through the air inlet 412, so that the piston plate 410 on the right side moves upward in the gas collecting chamber 48 to collect gas.

[0055] The pressing roller 42 located in the left curing device 4 will drive the two turntables 44 on both sides to rotate when it rotates. During the rotation of the two turntables 44, the corresponding multiple rotating blades 46 will be driven to slide along the inner wall of the corresponding rotating chamber 43 under the action of the corresponding elastic parts 47 and centrifugal force, so that the external gas is drawn into the rotating chamber 43 through the air inlet 412, and the gas is input into the gas collecting chamber 48 through the air outlet 413 and the air pipe 414, so that the piston plate 410 in the left gas collecting chamber 48 moves downward. During the downward movement of the piston plate 410 in the gas collecting chamber 48, the gas in the gas collecting chamber 48 will be discharged downward through the jet groove 416, thereby accelerating the curing of the liquid disperse dye, preventing the liquid disperse dye from falling off after contacting the pressing roller 42, and avoiding the pressing roller 42 from affecting the printing effect of the polyester fabric, thereby reducing color difference and infiltration, improving the clarity of the printed pattern and the color saturation, and improving the printing quality.

[0056] On the contrary, when the printing device 2 performs printing from right to left, the piston plate 410 located in the left curing device 4 will move upward in the corresponding gas collecting chamber 48 to collect gas, and the piston plate 410 located in the right curing device 4 will move downward in the corresponding gas collecting chamber 48, so that the gas in the right gas collecting chamber 48 is discharged downward through the corresponding jet slot 416, so that when the printing device 2 moves left and right to perform printing, the two groups of curing devices 4 can achieve one group to collect gas and the other group to exhaust gas.

[0057] It should be noted that when the piston plate 410 in one group of curing devices 4 moves upward, it will drive the sealing slider 411 to move upward in the corresponding connecting chamber 49, and squeeze the gas in the corresponding connecting chamber 49 into the connecting chamber 49 in the other group of curing devices 4 through the connecting hole 415 and the external pipeline. In the process of printing flowers to the left and right, the two connecting chambers 49 can achieve the effect of sucking air on one side and pushing air on the other side. On the one hand, the piston plate 410 in the curing device 4 is not affected by gas compression when moving upward, and gas can be collected faster. On the other hand, it can provide thrust for the piston plate 410 in the curing device 4 when moving downward, so that exhaust can be faster.

[0058] To sum up, through the setting of the curing device 4, when the printing device 2 moves left and right to print the polyester fabric, the piston plate 410 located in the left curing device 4 will move upward in the corresponding gas collecting chamber 48 to collect gas, and the piston plate 410 located in the right curing device 4 will move downward in the corresponding gas collecting chamber 48, so that the gas in the right gas collecting chamber 48 is discharged downward through the corresponding jet slot 416, so that when the printing device 2 moves left and right to print, the two groups of curing devices 4 can achieve one group to collect gas and the other group to exhaust gas, thereby accelerating the curing of the liquid disperse dye, preventing the liquid disperse dye from falling off after contacting the pressing roller 42, and avoiding the pressing roller 42 from affecting the printing effect of the polyester fabric, thereby reducing color difference and penetration, improving the clarity of the printed pattern and the color saturation, and improving the printing quality.

[0059] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wash-free printing process for polyester fabrics with liquid disperse dyes, characterized in that: The following steps are involved: S1. Pre-treating polyester fabric; S2, using a printing machine (1) to spray-print liquid disperse dye onto a polyester fabric; S3, drying the printed polyester fabric; S4, performing shaping treatment on the polyester fabric after drying; S5. Finishing and packaging the polyester fabric after shaping treatment; The printing machine (1) comprises a frame (11), a printing device (2) and a conveying device (3), and also comprises: A curing device (4), the curing device (4) comprising two groups, symmetrically arranged on both sides of the printing device (2) along the moving direction, and used to cooperate with the printing device (2) to blow air on the printed polyester fabric during the printing process; The curing device (4) comprises a mounting block (41) fixedly connected to the outer wall of the printing device (2); a pressing roller (42) is rotatably connected to the bottom of the mounting block (41); a rotating chamber (43) is fixedly connected to both sides of the mounting block (41); both ends of the rotating shaft of the pressing roller (42) are fixedly connected to a rotating disk (44); the two rotating disks (44) are respectively rotatably connected to the two rotating chambers (43); and the two rotating disks (44) are eccentrically arranged with respect to the corresponding rotating chambers (43); The rotating disk (44) is provided with a plurality of circumferentially equidistantly distributed limiting grooves (45), each limiting groove (45) is slidably connected with a rotary vane (46), each rotary vane (46) is connected to the corresponding limiting groove (45) with an elastic member (47), and each rotary vane (46) can always contact the inside of the rotating cavity (43) under the support of the corresponding elastic member (47); The mounting block (41) is provided with a gas collecting chamber (48) inside, a connecting chamber (49) is provided on the top of the gas collecting chamber (48), a piston plate (410) is slidably connected inside the gas collecting chamber (48), a sealing slider (411) is fixedly connected to the top of the piston plate (410) and is slidably connected to the inside of the connecting chamber (49), and a jetting groove (416) connected to the gas collecting chamber (48) is provided on the bottom of the mounting block (41) near the printing device (2); The outer wall of each rotating chamber (43) is provided with an air inlet (412) and an air outlet (413), and each air outlet (413) is connected to the interior of the air collecting chamber (48) through an air pipe (414).

2. The wash-free printing process for polyester fabrics with liquid disperse dyes according to claim 1, characterized in that: A connecting hole (415) communicating with the connecting chamber (49) is provided on the top of the mounting block (41), and the two connecting holes (415) in the two groups of curing devices (4) are connected via an external pipe.

3. The wash-free printing process for polyester fabrics with liquid disperse dyes according to claim 2, characterized in that: When the printing device (2) moves to print the polyester fabric, the two pressing rollers (42) in the two groups of curing devices (4) can contact the polyester fabric and rotate synchronously following the movement of the printing device (2).

4. The wash-free printing process for polyester fabric with liquid disperse dyes according to claim 3, characterized in that: When the rotating disk (44) rotates, it can drive the plurality of rotating blades (46) to slide along the inner wall of the corresponding rotating chamber (43), thereby forming one or more working chambers with variable volumes.

5. The wash-free printing process for polyester fabrics with liquid disperse dyes according to claim 4, characterized in that: When the rotating disk (44) rotates, external gas can be sucked into the rotating chamber (43) through the air inlet (412), and the gas can be transported to the gas collecting chamber (48) through the air outlet (413) and the air pipe (414).

Images