Printing process of polyester fabric

Abstract

The invention discloses a polyester fabric printing process, which relates to the technical field of printing processes, and is characterized by comprising the following steps: fabric impurity removal, modification treatment, corona punching, color paste preparation, printing preparation, fabric printing, steaming process, and drying and shaping. The printing process of the polyester fabric is simple and orderly in steps and high in production efficiency, thread knot impurities and fine particle impurities adhered to the surface of the polyester fabric can be removed, the surface of the polyester fabric is guaranteed to be smooth and clean, water is not needed for impurity removal, water-free cleaning is achieved, and the printing process is simple and convenient. The disperse dye can be more tightly wrapped on the surface of the fabric through the film-forming characteristic of the adhesive, the washing operation is avoided, the water consumption is reduced, and the dye utilization rate is high, so that the generation of printing wastewater is reduced, the environmental pollution is reduced, and the requirements of environmental protection and sustainability are met.

Description

Technical Field

[0001] The invention relates to the technical field of printing technology, in particular to a printing technology for polyester fabrics. Background Art

[0002] Printing is a comprehensive technology that integrates chemistry, physics and mechanics. Printing is the process of applying dyes or coatings into color pastes on textiles to print patterns. Printing, like dyeing, is also the process of dyeing on fibers, but printing is local coloring. In order to prevent the dye from seeping into the fiber and ensure that the pattern is clear and fine, it must be printed with color paste. Because the bath ratio is smaller than that of dyeing, printing should choose dyes with high solubility as much as possible, or increase the amount of co-solvent. In addition, due to the presence of paste in the color paste, the dyeing process of the dye on the fiber is more complicated than that of dyeing. Generally, after dye printing, a fixing method is required to promote the dyeing of the dye. Finally, the printed fabric should be fully washed and soaped to remove the paste and floating color, improve the feel, and increase the color brightness and fastness.

[0003] At present, the traditional disperse dye printing process is: screen printing, steaming (color development), water washing (removing paste and floating color), drying and finalizing. Among them, the sewage discharge in the water washing process is the main cause of printing sewage discharge. Since the printed products must go through multiple tanks of water washing after steam fixation, the products with dark colors need reduction washing, and the medium and light colors need soap washing, and finally need to be washed with water to be clean, so as to ensure the color fastness of the product. Therefore, a large amount of sewage will be generated during the entire production process, and the sewage has a large content of organic pollutants, deep color, and high alkalinity, which is difficult to treat and easily causes environmental pollution, and does not meet environmental protection requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a printing process for polyester fabric in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme, a printing process for polyester fabric comprises the following steps: 1) Fabric impurity removal: by setting up an impurity removal device, the polyester fabric is rolled up by the winding mechanism and wound into a tube. During this process, the polyester fabric needs to pass through the sticky component. Through the continuous feeding of the feeding mechanism, the impurities adhering to it can be removed and the surface impurities of the polyester fabric can be removed; 2) Modification treatment: using a pretreatment agent prepared in proportion by weak cationic organic matter, a small molecule cross-linking agent and an anti-precipitation agent to pre-treat the polyester fabric treated in step 1) to obtain a modified fabric; 3) Corona punching: placing the modified fabric treated in step 2) on a corona machine for corona treatment, punching micropores on the surface of the modified fabric; 4) Prepare color paste: Use disperse dye as main material and hollow nanospheres as auxiliary material, add original paste, adhesive, thickener, wetting agent, defoamer, acid release agent and stir evenly, then add organic solvent and continue stirring to make original color paste; 5) Printing preparation: Perform color analysis based on the monochrome image of the required printing pattern, then place the original color paste raw material in a beater and stir it evenly, then filter it through a screen to obtain the printing paste, then put the printing paste into the ink cartridge, and debug the various components of the printing machine, and prepare to start the machine after confirming that the temperature and humidity inside the printing room are appropriate; 6) Fabric printing: placing the modified fabric prepared in step 3) on a digital printing machine, applying color paste to the modified fabric through a nozzle, and performing inkjet printing on the modified fabric to obtain a printed fabric; 7) Steaming process: Place the printed fabric prepared in step 6) in a steaming box and fill it with saturated steam for 20 minutes, then cool it down and take out the fabric; 8) Drying and shaping: The printed fabric treated in step 7) is placed in a fabric shaping machine for drying and shaping, and is smoothed to obtain a finished fabric.

[0006] As a further configuration of the present invention, the hollow nanospheres are composed of the following components in parts by weight: 20-40 parts of sodium dihydrogen phosphate-citric acid buffer; 5-15 parts of pullulanase solution; Emulsifier 5-10 parts; 3-5 parts of starch.

[0007] As a further configuration of the present invention, the adhesive is a polyacrylate adhesive.

[0008] As a further configuration of the present invention, the impurity removal device includes a frame, a winding mechanism and a feeding mechanism are arranged on the frame, the feeding mechanism is arranged in front of the winding mechanism, the feeding mechanism includes a bracket fixed on the frame, a sticky component is arranged on the bracket, the sticky component includes an active sticky rubber roller and a driven sticky rubber roller, the active sticky rubber roller and the driven sticky rubber roller are both rotatably connected to the bracket, and the feeding mechanism includes a driving mechanism, which is connected to the active sticky rubber roller and is used to drive the active sticky rubber roller to rotate.

[0009] As a further configuration of the present invention, the active adhesive roller and the driven adhesive roller are detachably mounted on the bracket, and the active adhesive roller and the driven adhesive roller both include a roller body and an adhesive sleeve sleeved on the roller body.

[0010] As a further configuration of the present invention, a first connecting block and a second connecting block are provided on both sides of the bracket, the active adhesive roller is rotatably connected between the first connecting blocks, the driven adhesive roller is rotatably connected between the second connecting blocks, fastening bolts are connected between the first connecting block and the second connecting block, and threaded holes matching the fastening bolts are provided on both sides of the bracket.

[0011] As a further configuration of the present invention, the driving mechanism includes a driving motor, and a transmission component is connected between the output end of the driving motor and the active adhesive roller.

[0012] As a further configuration of the present invention, the transmission assembly includes a driving sprocket fixedly connected to the output end of the driving motor and a driven sprocket fixedly connected to the active adhesive roller, and a transmission chain is meshedly connected between the driving sprocket and the driven sprocket.

[0013] As a further configuration of the present invention, the winding mechanism includes a winding drum rotatably connected to the frame and a power motor for driving the winding drum to rotate.

[0014] As a further configuration of the present invention, a cloth supporting platform is provided on the frame.

[0015] In summary, the present invention has the following beneficial effects: The process steps of the invention are simple and orderly, and the production efficiency is high. The thread knot impurities and fine particle impurities adhered to the surface of the polyester fabric can be removed, and the surface of the polyester fabric can be ensured to be smooth and flat. No water is needed for impurity removal, and water-free cleaning is achieved. The adsorption capacity of the fabric for active dyes is significantly improved, so that the fabric has an extremely high dye uptake rate and a color fixation rate, and can be better combined with the dye, thereby reducing the effect of the water medium, thereby achieving the purpose of less water, reducing the generation of printing wastewater, and enabling the color paste to penetrate and adhere to the fabric surface more easily, thereby improving the dye uptake rate and the color fixation rate of the grey cloth, thereby effectively reducing the amount of dye, and thereby reducing printing wastewater. The disperse dye can be more tightly wrapped and coated on the fabric surface through the film-forming property of the adhesive, eliminating the operation of water washing, reducing water use, and having a high dye utilization rate, thereby reducing the generation of printing wastewater, reducing environmental pollution, and meeting the requirements of environmental protection and sustainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the impurity removal device in the present invention; Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 3 It is a structural schematic diagram of the feeding mechanism in the present invention.

[0017] Figure numerals: 1. frame; 2. bracket; 3. active adhesive roller; 4. driven adhesive roller; 5. roller body; 6. adhesive sleeve; 7. first connecting block; 8. second connecting block; 9. fastening bolt; 10. threaded hole; 11. driving motor; 12. driving sprocket; 13. driven sprocket; 14. transmission chain; 15. winding drum; 16. power motor; 17. cloth support table. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0019] A printing process for polyester fabric comprises the following steps: 1) Fabric impurity removal: by setting up an impurity removal device, the polyester fabric is rolled up by the winding mechanism and wound into a tube. During this process, the polyester fabric needs to pass through the sticky component. Through the continuous feeding of the feeding mechanism, the impurities adhering to it can be removed and the surface impurities of the polyester fabric can be removed; 2) Modification treatment: using a pretreatment agent prepared in proportion by weak cationic organic matter, a small molecule cross-linking agent and an anti-precipitation agent to pre-treat the polyester fabric treated in step 1) to obtain a modified fabric; 3) Corona punching: placing the modified fabric treated in step 2) on a corona machine for corona treatment, punching micropores on the surface of the modified fabric; 4) Preparing color paste: using disperse dye as main material and hollow nanospheres as auxiliary material, adding original paste, adhesive, thickener, wetting agent, defoamer, and acid release agent, stirring evenly, and then adding organic solvent and continuing stirring to prepare original color paste, wherein the hollow nanospheres are composed of the following components in parts by weight: 20-40 parts of sodium dihydrogen phosphate-citric acid buffer; 5-15 parts of pullulanase solution; 5-10 parts of emulsifier; 3-5 parts of starch, and the adhesive is polyacrylate adhesive; 5) Printing preparation: Perform color analysis based on the monochrome image of the required printing pattern, then place the original color paste raw material in a beater and stir it evenly, then filter it through a screen to obtain the printing paste, then put the printing paste into the ink cartridge, and debug the various components of the printing machine, and prepare to start the machine after confirming that the temperature and humidity inside the printing room are appropriate; 6) Fabric printing: placing the modified fabric prepared in step 3) on a digital printing machine, applying color paste to the modified fabric through a nozzle, and performing inkjet printing on the modified fabric to obtain a printed fabric; 7) Steaming process: Place the printed fabric prepared in step 6) in a steaming box and fill it with saturated steam for 20 minutes, then cool it down and take out the fabric; 8) Drying and shaping: The printed fabric treated in step 7) is placed in a fabric shaping machine for drying and shaping, and is smoothed to obtain a finished fabric.

[0020] The invention adopts a printing process flow of fabric impurity removal, modification treatment, corona punching, color paste preparation, printing preparation, fabric printing, steaming process, and drying and finalizing. The steps are simple and orderly, and the production efficiency is high. Through the fabric impurity removal step, the surface of the polyester fabric is preliminarily impurified by a sticking method, and the thread knot impurities and fine particle impurities adhered to the surface of the polyester fabric are removed, so that the surface of the polyester fabric is smooth and flat, and no water is needed for impurity removal, so that water-free cleaning is achieved. Through the modification treatment step, the negative charge effect on the fiber is effectively reduced and eliminated, thereby significantly improving the adsorption capacity of the fabric for active dyes, so that the fabric has an extremely high dyeing rate and fixation rate, can be better combined with the dye, thereby reducing the effect of the water medium, and then achieving the purpose of less water, reducing The generation of printing wastewater can be achieved by punching micropores on the surface of the fabric through the step of corona punching. When printing, the color paste can penetrate and adhere to the surface of the fabric more easily, thereby improving the dyeing rate and fixation rate of the grey cloth, thereby effectively reducing the amount of dye used, and further reducing printing wastewater. In the step of preparing the color paste, disperse dyes are used as the main material and hollow nanospheres are used as the auxiliary material, and the adhesive is used to carry and deliver the combination of the two to achieve fabric dyeing. The disperse dyes can be adsorbed on the surface of the hollow nanospheres, and the film-forming properties of the adhesive can wrap the disperse dyes more tightly on the surface of the fabric, eliminating the need for water washing, reducing water use, and achieving a high dye utilization rate, thereby reducing the generation of printing wastewater and reducing environmental pollution, meeting the requirements of environmental protection and sustainability.

[0021] See also Figure 1 , Figure 2As shown, the impurity removing device includes a frame 1, on which a cloth supporting platform 17 is arranged. In the process of winding the polyester fabric, the cloth supporting platform 17 can be used to place the tail end of the polyester fabric to prevent the tail end of the polyester fabric from falling to the ground, thereby preventing the polyester fabric from being soiled and ensuring the cleanliness of the polyester fabric. A winding mechanism and a feeding mechanism are arranged on the frame 1, and the feeding mechanism is arranged in front of the winding mechanism and directly facing the input end position of the winding mechanism. The winding mechanism includes a winding drum 15 rotatably connected to the frame 1 and a power motor 16 for driving the winding drum 15 to rotate. When it is necessary to wind the polyester fabric, the power motor 16 can be started to drive the winding drum 15 to rotate continuously, so that the polyester fabric can be wound into a tube shape, which is more convenient to operate. The feeding mechanism includes a bracket 2 fixed on the frame 1, and a sticky component is arranged on the bracket 2. The sticky component includes an active sticky roller 3 and a driven sticky roller 4, and The active viscose roller 3 and the driven viscose roller 4 are both rotatably connected to the bracket 2, and the feeding mechanism includes a driving mechanism, and the driving mechanism is connected to the active viscose roller 3 and is used to drive the active viscose roller 3 to rotate. In the process of the polyester fabric being rolled into a tube by the winding mechanism, it will first pass between the active viscose roller 3 and the driven viscose roller 4, and the active viscose roller 3 and the driven viscose roller 4 can produce friction with the surface of the polyester fabric. The active viscose roller 3 is driven by the driving mechanism to rotate, and the polyester fabric can be pulled, thereby driving the driven viscose roller 4 to rotate accordingly. Through the coordinated rotation of the active viscose roller 3 and the driven viscose, the polyester fabric can be continuously sent toward the winding mechanism, and the active viscose roller 3 and the driven viscose roller 4 can continuously rub the surface of the polyester fabric, remove impurities adhered to it, and realize surface impurity removal of the polyester fabric. The operation is relatively convenient and simple, and the impurity removal is relatively thorough and efficient.

[0022] See also Figure 1 , Figure 3As shown, the active viscose roller 3 and the driven viscose roller 4 are detachably mounted on the bracket 2, and both the active viscose roller 3 and the driven viscose roller 4 include a roller body 5 and a viscose sleeve 6 sleeved on the roller body 5. The viscose sleeve 6 can be used to remove impurities on the surface of the polyester fabric by self-adhesion, and when the viscose sleeve 6 loses its viscosity due to long-term use, the active viscose roller 3 and the driven viscose roller 4 can be removed from the bracket 2 in turn, and then the viscose sleeve 6 can be peeled off from the roller body 5 and replaced with a new viscose sleeve 6, so as to always ensure the viscosity of the active viscose roller 3 and the driven viscose roller 4, and ensure the impurity removal effect of the impurity removal device, wherein a first connecting block 7 and a second connecting block 8 are arranged on both sides of the bracket 2, and the active viscose roller 3 is rotatably connected between the first connecting block 7, and the driven viscose roller 4 is rotatably connected between the second connecting block 8, and the first connecting block 7 and the second connecting block 8 are connected to each other. The blocks 8 are connected with fastening bolts 9, and threaded holes 10 matching the fastening bolts 9 are opened on both sides of the bracket 2. When the active viscose roller 3 and the driven viscose roller 4 are installed on the bracket 2, the active viscose roller 3 can be installed between the first connecting blocks 7, and the driven viscose roller 4 can be installed between the second connecting blocks 8. Then, the first connecting block 7 and the second connecting block 8 are superimposed on the bracket 2, connected in series by the fastening bolts 9, and then the fastening bolts 9 are screwed into the threaded holes 10 for threaded connection to achieve installation. When the active viscose roller 3 and the driven viscose roller 4 need to be disassembled, it is only necessary to unscrew the fastening bolts 9 from the threaded holes 10, and then remove the first connecting block 7 and the second connecting block 8 in turn, and finally remove the active viscose roller 3 and the driven viscose roller 4, so that the disassembly and assembly of the active viscose roller 3 and the driven viscose roller 4 are relatively convenient, thereby facilitating replacement.

[0023] See also Figure 1 , Figure 2 As shown, the driving mechanism includes a driving motor 11, and a transmission component is connected between the output end of the driving motor 11 and the active adhesive roller 3. By starting the driving motor 11, the active adhesive roller 3 can be driven to rotate through the transmission component, and the operation is relatively convenient and simple. Among them, the transmission component includes a driving sprocket 12 fixedly connected to the output end of the driving motor 11 and a driven sprocket 13 fixedly connected to the active adhesive roller 3, and a transmission chain 14 is meshed and connected between the driving sprocket 12 and the driven sprocket 13. By starting the driving motor 11, the driving sprocket 12 is driven to rotate, and the driven sprocket 13 can be driven to rotate through the transmission chain 14, thereby driving the active adhesive roller 3 to rotate, and the transmission is stable and efficient.

[0024] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A printing process for polyester fabric, characterized in that: The steps include: 1) Fabric impurity removal: by setting up an impurity removal device, the polyester fabric is rolled up by the winding mechanism and wound into a tube. During this process, the polyester fabric needs to pass through the sticky component. Through the continuous feeding of the feeding mechanism, the impurities adhering to it can be removed and the surface impurities of the polyester fabric can be removed; 2) Modification treatment: using a pretreatment agent prepared in proportion by weak cationic organic matter, a small molecule cross-linking agent and an anti-precipitation agent to pre-treat the polyester fabric treated in step 1) to obtain a modified fabric; 3) Corona punching: placing the modified fabric treated in step 2) on a corona machine for corona treatment, punching micropores on the surface of the modified fabric; 4) Prepare color paste: Use disperse dye as main material and hollow nanospheres as auxiliary material, add original paste, adhesive, thickener, wetting agent, defoamer, acid release agent and stir evenly, then add organic solvent and continue stirring to make original color paste; 5) Printing preparation: Perform color analysis based on the monochrome image of the required printing pattern, then place the original color paste raw material in a beater and stir it evenly, then filter it through a screen to obtain the printing paste, then put the printing paste into the ink cartridge, and debug the various components of the printing machine, and prepare to start the machine after confirming that the temperature and humidity inside the printing room are appropriate; 6) Fabric printing: placing the modified fabric prepared in step 3) on a digital printing machine, applying color paste to the modified fabric through a nozzle, and performing inkjet printing on the modified fabric to obtain a printed fabric; 7) Steaming process: Place the printed fabric prepared in step 6) in a steaming box and fill it with saturated steam for 20 minutes, then cool it down and take out the fabric; 8) Drying and shaping: The printed fabric treated in step 7) is placed in a fabric shaping machine for drying and shaping, and is smoothed to obtain a finished fabric.

2. The printing process for polyester fabric according to claim 1, characterized in that: The hollow nanospheres are composed of the following components in parts by weight: 20-40 parts of sodium dihydrogen phosphate-citric acid buffer; 5-15 parts of pullulanase solution; Emulsifier 5-10 parts; 3-5 parts of starch.

3. The printing process for polyester fabric according to claim 1, characterized in that: The adhesive is a polyacrylate adhesive.

4. The printing process for polyester fabric according to claim 1, characterized in that: The impurity removal device comprises a frame (1), the frame (1) is provided with a winding mechanism and a feeding mechanism, the feeding mechanism is arranged in front of the winding mechanism, the feeding mechanism comprises a bracket (2) fixed on the frame (1), the bracket (2) is provided with a sticky component, the sticky component comprises an active sticky roller (3) and a driven sticky roller (4), the active sticky roller (3) and the driven sticky roller (4) are both rotatably connected to the bracket (2), and the feeding mechanism comprises a driving mechanism, the driving mechanism is connected to the active sticky roller (3) and is used to drive the active sticky roller (3) to rotate.

5. The printing process for polyester fabric according to claim 4, characterized in that: The active adhesive roller (3) and the driven adhesive roller (4) are detachably mounted on the bracket (2), and the active adhesive roller (3) and the driven adhesive roller (4) both comprise a roller body (5) and an adhesive sleeve (6) sleeved on the roller body (5).

6. The printing process for polyester fabric according to claim 5, characterized in that: A first connecting block (7) and a second connecting block (8) are provided on both sides of the bracket (2); the active adhesive roller (3) is rotatably connected between the first connecting blocks (7); the driven adhesive roller (4) is rotatably connected between the second connecting blocks (8); a fastening bolt (9) is connected between the first connecting block (7) and the second connecting block (8); and threaded holes (10) matching the fastening bolts (9) are provided on both sides of the bracket (2).

7. The printing process for polyester fabric according to claim 4, characterized in that: The driving mechanism comprises a driving motor (11), and a transmission component is connected between the output end of the driving motor (11) and the active adhesive roller (3).

8. The printing process for polyester fabric according to claim 7, characterized in that: The transmission assembly comprises a driving sprocket (12) fixedly connected to the output end of the driving motor (11) and a driven sprocket (13) fixedly connected to the driving adhesive roller (3), and a transmission chain (14) is meshedly connected between the driving sprocket (12) and the driven sprocket (13).

9. The printing process for polyester fabric according to claim 4, characterized in that: The winding mechanism comprises a winding drum (15) rotatably connected to the frame (1) and a power motor (16) for driving the winding drum (15) to rotate.

10. The printing process for polyester fabric according to claim 4, characterized in that: A cloth supporting platform (17) is provided on the frame (1).

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