Surface treatment process and equipment for high-solarization sunshade fabric with self-cleaning function

Abstract

The invention relates to the technical field of fabric treatment, in particular to a surface treatment process and equipment for a high-solarization sun-shading fabric with a self-cleaning function, and an integrated closed cavity is adopted for carrying out single-face full-process treatment on a circular sun-shading fabric base material. Comprising the following steps that S1, a base material is clamped and positioned, specifically, the circular sunshade fabric base material is placed on a rotary workbench at the bottom of a cavity, after the circle center is calibrated through a circle center positioning clamp, a vacuum adsorption device is started to flatly fix the base material, and the non-treatment face of the base material is attached and isolated through a sealing gasket; and S2, ultrasonic-assisted enzymolysis pretreatment: controlling an ultrasonic-assisted enzymolysis module to extend to a processing station, spraying an enzymolysis solution to the treated surface of the base material, and starting an ultrasonic vibrator array and a rotary worktable at the same time. The defects that in a traditional technology, the coating is weak in adhesive force and prone to falling off are effectively overcome, and the thickness uniformity of the coating is further guaranteed through the scraper of the double-layer composite coating and the spraying synergistic technology.

Description

TECHNICAL FIELD

[0001] The application relates to a surface treatment process and equipment for high-solar-shading sunshade fabric with self-cleaning function. BACKGROUND

[0002] With the rapid development of the outdoor leisure industry, the application scenarios of sunshade fabric are increasingly wide, especially the sunshade products with circular structures such as circular sunshades and outdoor pavilion roofs. Such circular sunshade fabric needs to have excellent self-cleaning performance and high-solar-stability.

[0003] At present, the surface treatment process of sunshade fabric is mainly designed for rectangular roll base materials, and adopts a linear continuous step-by-step processing mode. The functional modules of the existing linear equipment, such as scrapers and spray guns, are flatly designed and cannot adapt to the surface of circular base materials, which is prone to uneven coating thickness and spraying dead angles.

[0004] Therefore, the technical problem to be solved by the application is that the scrapers and spray guns are flatly designed and cannot adapt to the surface of circular base materials, which is prone to uneven coating thickness and spraying dead angles. SUMMARY

[0005] Therefore, the technical problem to be solved by the application is that the scrapers and spray guns are flatly designed and cannot adapt to the surface of circular base materials, which is prone to uneven coating thickness and spraying dead angles.

[0006] The above technical problem is solved by the following technical scheme: the application provides a surface treatment process for high-solar-shading sunshade fabric with self-cleaning function, which adopts an integrated sealed chamber to process the single surface of the circular sunshade fabric base material in a whole process, including the following steps:

[0007] S1, base material clamping and positioning: the circular sunshade fabric base material is placed on the rotary workbench at the bottom of the chamber, the center is calibrated by the center positioning clamp, the base material is fixed flat by starting the vacuum adsorption device, and the non-treatment surface of the base material is isolated by the sealing gasket;

[0008] S2, ultrasonic-assisted enzymatic pretreatment: the ultrasonic-assisted enzymatic module is controlled to extend to the processing station, the enzymatic solution is sprayed to the base material treatment surface, the ultrasonic transducer array and the rotary workbench are started at the same time, the ultrasonic frequency is 20-80 kHz, the enzymatic solution concentration is 1-3 wt%, the processing time is 10-15 min, and the residual moisture on the surface of the base material is removed by the drying module after enzymolysis;

[0009] S3, low temperature plasma pretreatment: control the low temperature plasma module to extend to the processing station, introduce Ar / O2 mixed gas into the chamber and start the electrode head discharge, the volume ratio of Ar to O2 is 3:1-5:1, the discharge power is 300-500W, the processing time is 30-60s, the chamber maintains a slight positive pressure during the processing, and the rotating worktable continues to rotate;

[0010] S4, bottom layer composite coating: control the single-sided scraper coating module to extend, coat the modified polyurethane emulsion containing nano ZnO / TiO2 particles on the substrate treatment surface, the coating thickness is controlled to be 10-20μm, the contact pressure of the scraper and the substrate is 0.1-0.3MPa, the rotating worktable rotates at a speed of 8r / min, after the coating is completed, it is pre-cured, then the single-sided spraying module is controlled to extend for supplementary coating, the spraying atomization particle size is 5-10μm, the spraying flow is 5-8mL / min, and the rotating worktable rotates at a speed of 15r / min;

[0011] S5, surface layer composite coating: switch to the surface layer slurry containing fluorine modified SiO2 nanoparticles, repeat the scraper coating and spraying supplementary coating process of step S4, and the surface layer coating thickness is controlled to be 5-10μm;

[0012] S6, final curing and product taking out: start the drying module for final curing, the final curing temperature is 120-150℃, the holding time is 5min, after the curing is completed, the chamber is naturally cooled to room temperature, and the vacuum suction device is closed to take out the product.

[0013] As a preferred scheme of the high-solar-shading fabric surface treatment process with self-cleaning, in the step S2, the enzyme solution is cellulase solution or protease solution, which is suitable for circular shading fabric substrates of cotton and hemp blended or polyester material, the drying module is an infrared radiation dryer, the drying temperature when removing residual moisture is 50-60℃, and the drying time is 2-3min.

[0014] As a preferred scheme of the high-solar-shading fabric surface treatment process with self-cleaning, in the step S4, the pre-curing temperature is 80-100℃, the holding time is 3-5min, and the switching time sequence of the ultrasonic-assisted enzyme module, the low temperature plasma module, the single-sided scraper coating module and the single-sided spraying module is preset to be linked by the PLC control system.

[0015] A high-solar-shading fabric surface treatment equipment with self-cleaning adopts the high-solar-shading fabric surface treatment process with self-cleaning, comprising:

[0016] A cylindrical box is provided with a gas inlet mechanism and a liquid inlet mechanism leading to the inside;

[0017] A storage mechanism is installed inside the cylindrical box, and the storage mechanism is equipped with an ultrasonic generator and multiple clamping mechanisms.

[0018] The spraying and scraping mechanism installed inside the cylindrical box includes a motor installed at the center of the inner wall of the top of the cylindrical box. An electric cylinder is installed at the bottom end of the output shaft of the motor, and a bushing is installed at the bottom end of the electric cylinder. An annular plate is sleeved on the outside of the bushing. Three scrapers are fixedly distributed at equal intervals on the outer circumference of the annular plate. A liquid storage bladder is provided on one side of each scraper. The three liquid storage bladders respectively store an enzymatic hydrolysate, a modified polyurethane emulsion containing nano-ZnO / TiO2 particles, and a surface slurry containing fluorine-modified SiO2 nanoparticles.

[0019] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, wherein: the scraper has a strip groove in the center, the scraper is hollow inside, a motor is fixed inside, one end of the motor output shaft is connected to the strip groove, and a diamond plate is sleeved on the outer wall of the motor output shaft.

[0020] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, wherein: multiple piston rods are inserted into the side of the liquid storage bladder near the diamond plate, multiple liquid inlet heads are provided at the top of the liquid storage bladder, and multiple liquid outlet heads are provided at the bottom of the liquid storage bladder.

[0021] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, the gas inlet mechanism includes an air pump and an annular pipe. The air pump is installed on the top outer wall of the cylindrical box, and the annular pipe is installed on the inner circumference of the cylindrical box near the top. The air pump is connected to the annular pipe, and multiple downwardly inclined air nozzles are evenly distributed on the inner circumference of the annular pipe.

[0022] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, the liquid inlet mechanism includes a liquid pump and an annular pipe II. The liquid pump is installed on the top outer wall of the cylindrical box, and the annular pipe II is installed on the inner circumference of the cylindrical box near the top. The liquid pump is connected to the annular pipe II, and multiple downwardly inclined liquid nozzles are installed at equal intervals on the inner circumference of the annular pipe II.

[0023] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, the placement mechanism includes a support column installed at the center of the inner wall of the bottom of a cylindrical box, a housing installed on the top of the support column, a second motor installed inside the housing, an adsorption pump installed at the top of the output shaft of the second motor, an air suction plate installed at one end of the adsorption pump, a circular plate fixed on the outer circumference of the air suction plate, an annular groove opened near the outer side of the surface of the circular plate, multiple vertical through holes opened on the surface of the annular groove, multiple clamping mechanisms equally distributed inside the annular groove, and an ultrasonic generator installed on the bottom outer wall of the circular plate.

[0024] As a preferred embodiment of the self-cleaning high-sunlight shading fabric surface treatment process and equipment of the present invention, the clamping mechanism includes a mounting plate fixed on the side wall of the annular groove, an electric telescopic rod fixed at one end of the mounting plate, and an arc-shaped clamping plate installed at one end of the electric telescopic rod.

[0025] The beneficial effects of the self-cleaning high-sunlight-shielding fabric surface treatment process and equipment of the present invention are as follows:

[0026] This invention achieves single-sided full-process processing of circular sunshade fabric substrates through an integrated sealed chamber design, effectively solving the problems of secondary pollution and positioning deviation caused by substrate transfer across equipment in the traditional linear step-by-step processing mode. Each functional module is adapted to the surface of the circular substrate, ensuring uniformity and no dead corners in each process such as ultrasonic-assisted enzymatic hydrolysis, low-temperature plasma pretreatment, and composite coating. Furthermore, the PLC control system enables precise linkage of module switching sequence, greatly improving processing efficiency while avoiding media contamination on non-treated surfaces, ensuring the accuracy of single-sided processing.

[0027] This invention significantly increases the amount of active groups introduced onto the substrate surface through a composite pretreatment process of ultrasound-assisted enzymatic hydrolysis and low-temperature plasma. This allows the subsequent modified polyurethane underlayer containing nano-ZnO / TiO2 particles and the surface layer containing fluorine-modified SiO2 nanoparticles to form a strong bond with the substrate, effectively solving the defects of weak coating adhesion and easy peeling in traditional processes. The combined scraping and spraying process of the double-layer composite coating further ensures the uniformity of coating thickness, giving the product excellent high sunlight stability and superhydrophobic self-cleaning properties, and extending the product's service life. At the same time, the single-sided treatment design reduces the loss of functional slurry and lowers production costs, combining excellent practicality and economy. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein:

[0029] Figure 1 A schematic diagram of the overall structure of a surface treatment device for high-sunlight shading fabrics with self-cleaning properties.

[0030] Figure 2 A schematic diagram of the storage and clamping mechanisms for a self-cleaning, high-sunlight-resistant sunshade fabric surface treatment device.

[0031] Figure 3 A schematic diagram of the structure of the storage mechanism and ultrasonic generator for a self-cleaning, high-sunlight-resistant sunshade fabric surface treatment device.

[0032] Figure 4 A schematic diagram of the spraying and scraping mechanism for a surface treatment equipment for high-sunlight shading fabrics with self-cleaning properties.

[0033] Figure 5 for Figure 4 A structural schematic diagram showing partial details.

[0034] Figure 6 A schematic diagram of the gas inlet mechanism and liquid inlet mechanism for a surface treatment device for self-cleaning high-sunlight shading fabric.

[0035] In the diagram: 1. Cylindrical box; 101. Box door; 2. Gas inlet mechanism; 201. Air pump; 202. Annular pipe one; 203. Gas outlet nozzle; 3. Liquid inlet mechanism; 301. Liquid pump; 302. Annular pipe two; 303. Liquid outlet nozzle; 4. Spraying and scraping mechanism; 401. Motor one; 402. Electric cylinder; 403. Bushing; 404. Annular plate; 405. Scraper; 406. Diamond plate; 407. Liquid reservoir; 408. Liquid inlet head; 409. Motor; 410. Piston rod; 411. Liquid outlet head; 5. Clamping mechanism; 501. Mounting plate; 502. Electric telescopic rod; 503. Arc-shaped clamping plate; 6. Storage mechanism; 601. Support column; 602. Chassis; 603. Circular plate; 604. Annular groove; 605. Through hole; 606. Air suction plate; 607. Adsorption pump; 7. Ultrasonic generator. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0037] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0038] This embodiment provides a surface treatment process for high-sunlight shading fabric with self-cleaning properties. It employs an integrated, sealed chamber to perform a single-sided, full-process treatment on a circular shading fabric substrate, including the following steps:

[0039] S1. Substrate clamping and positioning: Place the circular sunshade fabric substrate on the rotating worktable at the bottom of the chamber. After calibrating the center with the center positioning fixture, start the vacuum adsorption device to flatten and fix the substrate. The non-treated surface of the substrate is sealed and isolated by the sealing gasket.

[0040] S2. Ultrasonic-assisted enzymatic hydrolysis pretreatment: Control the ultrasonic-assisted enzymatic hydrolysis module to extend to the processing station and spray the enzymatic hydrolysate onto the substrate surface. At the same time, turn on the ultrasonic transducer array and the rotating worktable. The ultrasonic frequency is 20-80kHz, the concentration of the enzymatic hydrolysate is 1-3wt%, and the treatment time is 10-15min. After the enzymatic hydrolysis is completed, remove the residual moisture on the substrate surface through the drying module.

[0041] S3. Low-temperature plasma pretreatment: Control the low-temperature plasma module to extend to the processing station, introduce Ar / O2 mixed gas into the chamber and start the electrode head discharge. The volume ratio of Ar to O2 is 3:1-5:1, the discharge power is 300-500W, the processing time is 30-60s, the chamber is kept under a slight positive pressure during the processing, and the rotating table continues to rotate.

[0042] S4. Underlying Composite Coating: Control the extension of the single-sided scraper coating module to coat the substrate surface with a modified polyurethane emulsion containing nano-ZnO / TiO2 particles. The coating thickness is controlled at 10-20μm, the contact pressure between the scraper and the substrate is 0.1-0.3MPa, and the rotation speed of the rotary table is 8r / min. After the coating is completed, it is pre-cured, and then the single-sided spraying module is extended for touch-up coating. The spray atomization particle size is 5-10μm, the spray flow rate is 5-8mL / min, and the rotation speed of the rotary table is 15r / min.

[0043] S5. Surface composite coating: Switch to a surface slurry containing fluorine-modified SiO2 nanoparticles, and repeat the scraper coating and spraying touch-up process of step S4. The thickness of the surface coating is controlled to be 5-10μm.

[0044] S6. Final curing and finished product removal: Start the drying module for final curing. The final curing temperature is 120-150℃, and the holding time is 5 minutes. After curing, the chamber will naturally cool down to room temperature. Then, turn off the vacuum adsorption device and remove the finished product.

[0045] Specifically, the enzymatic hydrolysate in step S2 is a cellulase solution or a protease solution, which is suitable for round sunshade fabric substrates made of cotton-linen blend or polyester. The drying module is an infrared radiation dryer, and the drying temperature for removing residual moisture is 50-60℃, and the drying time is 2-3 minutes.

[0046] Furthermore, in step S4, the pre-curing temperature is 80-100℃ and the holding time is 3-5 minutes. The switching sequence of the ultrasonic-assisted enzymatic hydrolysis module, the low-temperature plasma module, the single-sided scraper coating module, and the single-sided spraying module is preset and linked by the PLC control system.

[0047] refer to Figures 1 to 6 This embodiment is one specific implementation of the above-described process. This embodiment provides a surface treatment device for high-sunlight shading fabric with self-cleaning capabilities, employing the above-described surface treatment process for high-sunlight shading fabric with self-cleaning capabilities, including:

[0048] Cylindrical box 1, with a gas inlet mechanism 2 and a liquid inlet mechanism 3 provided on top of cylindrical box 1;

[0049] The storage mechanism 6 is installed inside the cylindrical box 1. The storage mechanism 6 is equipped with an ultrasonic generator 7 and multiple clamping mechanisms 5.

[0050] The spraying and scraping mechanism 4 installed inside the cylindrical box 1 includes a motor 401 installed at the center of the inner wall of the top of the cylindrical box 1. An electric cylinder 402 is installed at the bottom end of the output shaft of the motor 401. A bushing 403 is installed at the bottom end of the electric cylinder 402. An annular plate 404 is sleeved on the outside of the bushing 403. Three scrapers 405 are fixedly distributed at equal intervals on the outer circumference of the annular plate 404. A liquid storage bladder 407 is provided on one side of each scraper 405. The three liquid storage bladders 407 respectively store enzymatic hydrolysate, modified polyurethane emulsion containing nano ZnO / TiO2 particles, and surface slurry containing fluorine-modified SiO2 nanoparticles.

[0051] A door 101 is installed on the front outer wall of the cylindrical box 1.

[0052] In use, this device employs specific components, representing a particular implementation method. This specific implementation method is described below: First, after opening the box door 101, place the circular sunshade fabric substrate in the center of the placement mechanism 6. Secure the substrate using the placement mechanism 6 and the clamping mechanism 5. Then close the box door 101 to begin substrate processing. Start the spraying and grooving mechanism 4, and use the electric cylinder 402 to adjust the scraper 405 to adhere to the substrate surface. Then, open the reservoir 407 containing the enzymatic hydrolysate, spraying the hydrolysate onto the substrate. Start the motor 401 to rotate it and evenly apply the hydrolysate. Then, start the ultrasonic generator 7 and the liquid inlet mechanism 3 for ultrasonic-assisted enzymatic hydrolysis pretreatment. After hydrolysis, remove residual moisture from the substrate surface. This gently and efficiently removes impurities, grease, and residual slurry from the circular substrate surface, avoiding damage to the substrate caused by traditional alkaline washing. Simultaneously, it initially improves the hydrophilicity of the substrate surface. Combined with the high-frequency action of the ultrasonic transducer, the cleaning and modification effects of the hydrolysate are more uniform, laying a good surface foundation for subsequent low-temperature plasma pretreatment.

[0053] After the ultrasound-assisted enzymatic hydrolysis pretreatment is completed, the gas introduction mechanism 2 is activated to perform low-temperature plasma pretreatment. High-energy particles generated by the discharge of Ar / O2 mixed gas are used to precisely bombard the surface of the circular substrate. At room temperature, the molecular bonds on the surface of the substrate can be broken, and active groups such as hydroxyl and carboxyl groups can be efficiently introduced. This solves the defects of weak coating adhesion and easy peeling after long-term sun exposure in traditional processes.

[0054] Then, the spraying and scraping mechanism 4 is restarted. This time, the reservoir 407 of the enzymatic hydrolysate is closed, and the reservoir 407 of the modified polyurethane emulsion containing nano ZnO / TiO2 particles is opened. The modified polyurethane emulsion can be chemically bonded to the surface of the pretreated substrate, providing a stable substrate for subsequent surface layers. It can efficiently absorb and scatter outdoor ultraviolet rays, improve the high sun protection stability of the fabric, and assist in the degradation of organic pollutants attached to the coating surface, forming a synergistic enhancement effect with the self-cleaning performance of the surface layer.

[0055] Then, the reservoir 407 of the fluorine-modified SiO2 nanoparticle surface slurry is opened. After the fluorine-modified SiO2 nanoparticles in the slurry are coated, a stable micro-nano rough structure will be formed on the surface of the bottom coating, thus constructing a superhydrophobic self-cleaning structure.

[0056] Then, curing is performed, which completes the addition of the fabric's self-cleaning function and enhances its sun-shading effect under high sunlight.

[0057] It should be noted that the scraper 405 has a strip groove in the center and the interior of the scraper 405 is hollow. A motor 409 is fixed inside. One end of the output shaft of the motor 409 is connected to the strip groove, and a diamond plate 406 is sleeved on the outer wall of the output shaft of the motor 409.

[0058] Specifically, multiple piston rods 410 are inserted into the side of the reservoir 407 near the rhomboid plate 406, multiple inlet heads 408 are provided on the top of the reservoir 407, and multiple outlet heads 411 are provided on the bottom of the reservoir 407.

[0059] The motor 409 is started, which drives the diamond plate 406 to rotate. On the one hand, it can scrape the coating of the substrate to make it evenly coated. On the other hand, the piston rod 410 presses the liquid reservoir 407, so that the liquid inside the liquid reservoir 407 flows out to the surface of the substrate, which is convenient for even coating.

[0060] Furthermore, the gas inlet mechanism 2 includes an air pump 201 and an annular pipe 202. The air pump 201 is installed on the top outer wall of the cylindrical box 1, and the annular pipe 202 is installed on the inner circumference of the cylindrical box 1 near the top. The air pump 201 is connected to the annular pipe 202, and multiple downwardly inclined air nozzles 203 are installed at equal intervals on the inner circumference of the annular pipe 202.

[0061] The liquid inlet mechanism 3 includes a liquid pump 301 and an annular pipe 302. The liquid pump 301 is installed on the top outer wall of the cylindrical box 1, and the annular pipe 302 is installed on the inner circumference of the cylindrical box 1 near the top. The liquid pump 301 is connected to the annular pipe 302. Multiple downwardly inclined liquid outlet nozzles 303 are installed at equal intervals on the inner circumference of the annular pipe 302.

[0062] The gas nozzle 203 is used to perform low-temperature plasma pretreatment, and the liquid nozzle 303 is used to perform ultrasound-assisted enzymatic hydrolysis pretreatment.

[0063] It should be noted that the storage mechanism 6 includes a support column 601 installed at the center of the inner wall of the bottom of the cylindrical box 1. A housing 602 is installed on the top of the support column 601. A second motor is installed inside the housing 602. An adsorption pump 607 is installed at the top of the output shaft of the second motor. An air suction plate 606 is installed at one end of the adsorption pump 607. A circular plate 603 is fixed on the outer circumference of the air suction plate 606. An annular groove 604 is opened on the surface of the circular plate 603 near the outer side. Multiple vertical through holes 605 are opened on the surface of the annular groove 604. Multiple clamping mechanisms 5 are equidistantly distributed inside the annular groove 604. An ultrasonic generator 7 is installed on the bottom outer wall of the circular plate 603.

[0064] The clamping mechanism 5 includes a mounting plate 501 fixed on the side wall of the annular groove 604. One end of the mounting plate 501 is fixed with an electric telescopic rod 502, and one end of the electric telescopic rod 502 is fitted with an arc-shaped clamping plate 503.

[0065] The substrate is fixed by the air suction plate 606 and the arc-shaped clamp 503 to prevent the substrate from moving during operation.

[0066] In use, after opening the box door 101, place the circular sunshade fabric substrate in the center of the placement mechanism 6, fix the substrate through the placement mechanism 6 and the clamping mechanism 5, and then close the box door 101 to start the substrate treatment. Start the spraying and grooving mechanism 4, and use the electric cylinder 402 to adjust the scraper 405 to fit the surface of the substrate. Then, open the reservoir 407 containing the enzymatic hydrolysate and spray the enzymatic hydrolysate onto the substrate. Then, start the motor 401 to rotate it and evenly spread the enzymatic hydrolysate. Then, start the ultrasonic generator 7 and the liquid inlet mechanism 3 to perform ultrasonic-assisted enzymatic hydrolysis pretreatment. After the enzymatic hydrolysis is completed, remove the residual moisture on the surface of the substrate. It can gently and efficiently remove impurities, grease and residual slurry from the surface of the circular substrate, avoiding the damage to the substrate caused by traditional alkaline washing. At the same time, it initially improves the hydrophilicity of the substrate surface. With the high-frequency action of the ultrasonic transducer, the cleaning and modification effect of the enzymatic hydrolysate is more uniform, laying a good surface foundation for subsequent low-temperature plasma pretreatment.

[0067] After the ultrasound-assisted enzymatic hydrolysis pretreatment is completed, the gas introduction mechanism 2 is activated to perform low-temperature plasma pretreatment. High-energy particles generated by the discharge of Ar / O2 mixed gas are used to precisely bombard the surface of the circular substrate. At room temperature, the molecular bonds on the surface of the substrate can be broken, and active groups such as hydroxyl and carboxyl groups can be efficiently introduced. This solves the defects of weak coating adhesion and easy peeling after long-term sun exposure in traditional processes.

[0068] Then, the spraying and scraping mechanism 4 is restarted. This time, the reservoir 407 of the enzymatic hydrolysate is closed, and the reservoir 407 of the modified polyurethane emulsion containing nano ZnO / TiO2 particles is opened. The modified polyurethane emulsion can be chemically bonded to the surface of the pretreated substrate, providing a stable substrate for subsequent surface layers. It can efficiently absorb and scatter outdoor ultraviolet rays, improve the high sun protection stability of the fabric, and assist in the degradation of organic pollutants attached to the coating surface, forming a synergistic enhancement effect with the self-cleaning performance of the surface layer.

[0069] Then, the reservoir 407 of the fluorine-modified SiO2 nanoparticle surface slurry is opened. After the fluorine-modified SiO2 nanoparticles in the slurry are coated, a stable micro-nano rough structure will be formed on the surface of the bottom coating, thus constructing a superhydrophobic self-cleaning structure.

[0070] Then, curing is performed, which completes the addition of the fabric's self-cleaning function and enhances its sun-shading effect under high sunlight.

[0071] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A surface treatment process for a high-sunlight-repellent shading fabric with self-cleaning properties, characterized in that: The circular sunshade fabric substrate is processed using an integrated sealed chamber, including the following steps: S1. Substrate clamping and positioning: Place the circular sunshade fabric substrate on the rotating worktable at the bottom of the chamber. After calibrating the center with the center positioning fixture, start the vacuum adsorption device to flatten and fix the substrate. The non-treated surface of the substrate is sealed and isolated by the sealing gasket. S2. Ultrasonic-assisted enzymatic hydrolysis pretreatment: Control the ultrasonic-assisted enzymatic hydrolysis module to extend to the processing station and spray the enzymatic hydrolysate onto the substrate surface. At the same time, turn on the ultrasonic transducer array and the rotating worktable. The ultrasonic frequency is 20-80kHz, the concentration of the enzymatic hydrolysate is 1-3wt%, and the treatment time is 10-15min. After the enzymatic hydrolysis is completed, remove the residual moisture on the substrate surface through the drying module. S3. Low-temperature plasma pretreatment: Control the low-temperature plasma module to extend to the processing station, introduce Ar / O2 mixed gas into the chamber and start the electrode head discharge. The volume ratio of Ar to O2 is 3:1-5:1, the discharge power is 300-500W, the processing time is 30-60s, the chamber is kept under a slight positive pressure during the processing, and the rotating table continues to rotate. S4. Underlying Composite Coating: Control the extension of the single-sided scraper coating module to coat the substrate surface with a modified polyurethane emulsion containing nano-ZnO / TiO2 particles. The coating thickness is controlled at 10-20μm, the contact pressure between the scraper and the substrate is 0.1-0.3MPa, and the rotation speed of the rotary table is 8r / min. After the coating is completed, it is pre-cured, and then the single-sided spraying module is extended for touch-up coating. The spray atomization particle size is 5-10μm, the spray flow rate is 5-8mL / min, and the rotation speed of the rotary table is 15r / min. S5. Surface composite coating: Switch to a surface slurry containing fluorine-modified SiO2 nanoparticles, and repeat the scraper coating and spraying touch-up process of step S4. The thickness of the surface coating is controlled to be 5-10μm. S6. Final curing and finished product removal: Start the drying module for final curing. The final curing temperature is 120-150℃, and the holding time is 5 minutes. After curing, the chamber will naturally cool down to room temperature. Then, turn off the vacuum adsorption device and remove the finished product.

2. The surface treatment process for self-cleaning, high-sunlight-repellent shading fabric as described in claim 1, characterized in that: The enzymatic hydrolysate mentioned in step S2 is a cellulase solution or a protease solution, which is suitable for round sunshade fabric substrates made of cotton-linen blend or polyester. The drying module is an infrared radiation dryer, and the drying temperature for removing residual moisture is 50-60℃, and the drying time is 2-3 minutes.

3. The surface treatment process for self-cleaning, high-sunlight-repellent shading fabric as described in claim 1, characterized in that: In step S4, the pre-curing temperature is 80-100℃ and the holding time is 3-5 minutes. The switching sequence of the ultrasonic-assisted enzymatic hydrolysis module, low-temperature plasma module, single-sided scraper coating module, and single-sided spraying module is preset and linked by the PLC control system.

4. A surface treatment device for high-sunlight shading fabric with self-cleaning capability, employing the surface treatment process for high-sunlight shading fabric with self-cleaning capability as described in any one of claims 1-3, characterized in that: include: A cylindrical box (1) is provided with a gas inlet mechanism (2) and a liquid inlet mechanism (3) above the cylindrical box (1). The storage mechanism (6) is installed inside the cylindrical box (1) and is equipped with an ultrasonic generator (7) and multiple clamping mechanisms (5). The spraying and scraping mechanism (4) installed inside the cylindrical box (1) includes a motor (401) installed at the center of the inner wall of the top of the cylindrical box (1). An electric cylinder (402) is installed at the bottom end of the output shaft of the motor (401). A bushing (403) is installed at the bottom end of the electric cylinder (402). An annular plate (404) is sleeved on the outside of the bushing (403). Three scrapers (405) are fixedly distributed at equal intervals on the outer circumference of the annular plate (404). A liquid storage bladder (407) is provided on one side of each scraper (405). The three liquid storage bladders (407) respectively store enzymatic hydrolysate, modified polyurethane emulsion containing nano ZnO / TiO2 particles, and surface slurry containing fluorine-modified SiO2 nanoparticles.

5. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 4, characterized in that: The scraper (405) has a strip groove in the center and the interior of the scraper (405) is hollow. A motor (409) is fixed inside. One end of the output shaft of the motor (409) is connected to the strip groove. A diamond plate (406) is sleeved on the outer wall of the output shaft of the motor (409).

6. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 5, characterized in that: Multiple piston rods (410) are inserted into the side of the reservoir (407) near the rhomboid plate (406). Multiple liquid inlet heads (408) are provided on the top of the reservoir (407), and multiple liquid outlet heads (411) are provided on the bottom of the reservoir (407).

7. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 4, characterized in that: The gas inlet mechanism (2) includes an air pump (201) and an annular pipe (202). The air pump (201) is installed on the top outer wall of the cylindrical box (1), and the annular pipe (202) is installed on the inner circumference of the cylindrical box (1) near the top. The air pump (201) is connected to the annular pipe (202). Multiple downwardly inclined air nozzles (203) are installed at equal intervals on the inner circumference of the annular pipe (202).

8. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 4, characterized in that: The liquid inlet mechanism (3) includes a liquid pump (301) and an annular pipe (302). The liquid pump (301) is installed on the top outer wall of the cylindrical box (1), and the annular pipe (302) is installed on the inner circumference of the cylindrical box (1) near the top. The liquid pump (301) is connected to the annular pipe (302). Multiple downwardly inclined liquid nozzles (303) are installed at equal intervals on the inner circumference of the annular pipe (302).

9. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 4, characterized in that: The placement mechanism (6) includes a support column (601) installed at the center of the inner wall of the bottom of the cylindrical box (1). A housing (602) is installed on the top of the support column (601). A motor is installed inside the housing (602). An adsorption pump (607) is installed at the top of the output shaft of the motor. An air suction plate (606) is installed at one end of the adsorption pump (607). A circular plate (603) is fixed on the outer circumference of the air suction plate (606). An annular groove (604) is opened on the surface of the circular plate (603) near the outer side. A plurality of vertical through holes (605) are opened on the surface of the annular groove (604). A plurality of clamping mechanisms (5) are equidistantly distributed inside the annular groove (604). An ultrasonic generator (7) is installed on the outer bottom wall of the circular plate (603).

10. The surface treatment equipment for high-sunlight shading fabric with self-cleaning function as described in claim 9, characterized in that: The clamping mechanism (5) includes a mounting plate (501) fixed on the side wall of the annular groove (604), an electric telescopic rod (502) fixed at one end of the mounting plate (501), and an arc-shaped clamping plate (503) installed at one end of the electric telescopic rod (502).

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