Cleaning method of polyester fabric

Abstract

The invention provides a polyester fabric cleaning method, and relates to the technical field of textile cleaning, the method comprises the following steps: placing a to-be-cleaned polyester fabric in a cleaning device, heating to a first preset temperature, introducing cleaning water for cleaning, dewatering and drying; the cleaning water is micro-nano bubble water; in the cleaning process, the advantages of small size, high specific surface area, high surface activity and the like of the micro-nano bubbles are utilized, and the micro-nano bubbles can generate a strong cavitation effect and an oxidation effect in water, so that oil stains and impurities on the surfaces of the fibers are effectively decomposed and removed, and the oil impurities can be efficiently removed from internal pores of the fibers of the polyester fabric; and meanwhile, the use of chemical agents is avoided or the use amount of the chemical agents is reduced, and the water consumption is reduced, so that high-quality polyester is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of textile cleaning, and particularly to a method for cleaning polyester fabrics. Background Art

[0002] As an important synthetic fiber, polyester is widely used in the fields of textiles, clothing, home furnishings, etc. In the production process of polyester, rinsing is one of the key steps to ensure the fiber quality. The main purpose of rinsing is to remove the residual oils, additives and other impurities in the spinning process to improve the purity, mechanical properties and dyeing properties of the fiber. The traditional polyester rinsing process mainly relies on water cleaning or chemical cleaning methods, but these methods have certain limitations.

[0003] Although the traditional water cleaning process is simple to operate, it has a large water consumption and limited removal effect on stubborn oil stains and impurities, making it difficult to meet the requirements of high-quality polyester production. In addition, the discharge of a large amount of wastewater also increases the environmental protection pressure and treatment cost. Although the chemical cleaning process can effectively remove oil stains and impurities, the chemicals such as acids, alkalis or oxidants used may cause fiber damage, and the residual chemical substances may affect the subsequent processing performance. At the same time, the wastewater generated by chemical cleaning contains harmful substances, which is difficult to treat and poses a potential hazard to the environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for cleaning polyester fabrics to improve the cleaning efficiency of polyester, obtain high-quality polyester, and at the same time reduce the usage amount of chemical agents and the amount of cleaning water.

[0005] To solve the above technical problem, in a first aspect, an embodiment of the present invention provides a method for cleaning polyester fabrics, including the following steps:

[0006] Place the polyester fabric to be cleaned in a cleaning device, and after heating to a first preset temperature, introduce cleaning water and perform cleaning, dehydration and drying treatments, wherein the cleaning water is micro-nano bubble water.

[0007] In a second aspect, an embodiment of the present invention provides a method for cleaning polyester fabrics, including the following steps:

[0008] Place the polyester fabric to be cleaned in a cleaning device, and after heating to a second preset temperature, introduce cleaning water and a preset chemical agent and perform chemical agent cleaning treatment;

[0009] Place the polyester fabric after chemical agent cleaning in a cleaning device, and after heating to a third preset temperature, introduce cleaning water and a preset acid solution and perform acid cleaning, dehydration and drying treatments; wherein, the cleaning water introduced in the chemical agent cleaning and the acid cleaning is micro-nano bubble water.

[0010] In a third aspect, an embodiment of the present invention provides a method for cleaning polyester fabric, comprising the following steps:

[0011] Place the polyester fabric to be cleaned in a cleaning device. After heating to a fourth preset temperature, introduce cleaning water and perform a first cleaning treatment.

[0012] Place the polyester fabric after the first cleaning in a cleaning device. After heating to a fifth preset temperature, introduce cleaning water and a preset chemical agent and perform a chemical agent cleaning treatment.

[0013] Place the polyester fabric after the chemical agent cleaning in a cleaning device. After heating to a sixth preset temperature, introduce cleaning water and a preset acid solution and perform acid cleaning, dehydration, and drying treatments. The cleaning water introduced in the first cleaning, the chemical agent cleaning, and the acid cleaning is all micro-nano bubble water.

[0014] In one embodiment, after the chemical agent cleaning, it further includes:

[0015] Place the polyester fabric after the chemical agent cleaning in a cleaning device. After heating to a first set temperature, introduce cleaning water and perform a cleaning treatment; wherein, the cleaning water introduced during the cleaning process is micro-nano bubble water.

[0016] In one embodiment, after the acid cleaning, it further includes:

[0017] Place the polyester fabric after the acid cleaning in a cleaning device. After heating to a second set temperature, introduce cleaning water and perform a cleaning treatment, wherein the cleaning water introduced during the cleaning process is micro-nano bubble water.

[0018] In one embodiment, the preset chemical agent includes a cylinder cleaner, a penetrant, and sodium carbonate; the preset acid solution is an acetic acid solution;

[0019] Optionally, the mixing concentration of the acetic acid solution is 1.0 - 1.5 g / L.

[0020] In one embodiment, the mass ratio of the polyester fabric to be cleaned to the cleaning water is 1:20.

[0021] In one embodiment, the micro-nano bubble water is formed by combining micro-nano bubbles entering the cleaning device in a continuous flow manner with cleaning water, and the micro-nano bubbles are generated by a micro-nano bubble generating device;

[0022] Optionally, the micro-nano bubbles include microbubbles and / or nanobubbles;

[0023] Optionally, the cleaning device used during the cleaning process includes:

[0024] A water bath device, in which a cleaning component for placing polyester fabrics to be cleaned is placed;

[0025] A micro-nano bubble generating device, the micro-nano bubble generating device and the cleaning component are respectively communicated through a water inlet pipe and a water outlet pipe, and the micro-nano bubble generating device is used to generate and supply micro-nano bubbles to the cleaning component; and

[0026] A temperature control system, the temperature control system is arranged at the bottom of the water bath device and is used to control the temperature in the water bath device;

[0027] Optionally, a shaking component and a porous plate are arranged in the cleaning component; wherein, the porous plate is used to place the polyester fabrics to be cleaned, and the shaking component is used to stir and oscillate the cleaning water;

[0028] Optionally, during the cleaning process, the oscillation rate of the shaking component is 200 revolutions per minute.

[0029] In one embodiment, the number of micron bubbles generated by the micro-nano bubble generating device is 1×10 5 ~8×10 6 per milliliter, and the particle size of the micron bubbles is 20~80μm.

[0030] In one embodiment, the number of nano bubbles generated by the micro-nano bubble generating device is 1×10 7 ~5×10 8 per milliliter, and the particle size of the nano bubbles is 100~200 nanometers.

[0031] The above scheme of the present invention has at least the following beneficial effects:

[0032] The cleaning method of polyester fabrics provided by the above scheme of the present invention specifically includes the following cleaning steps: placing the polyester fabrics to be cleaned in a cleaning device, after heating to a first preset temperature, introducing cleaning water and performing a first cleaning, dehydration and drying treatment, and the cleaning water is micro-nano bubble water; by utilizing the advantages of small size, high specific surface area and high surface activity of micro-nano bubbles themselves, and being able to generate strong cavitation effects and oxidation effects in water, thereby effectively decomposing and removing the oil stains and impurities on the fiber surface, the oil and impurity components can be efficiently removed from the internal pores of the fibers of the polyester fabrics, thereby improving the cleaning efficiency of the polyester fabrics, and at the same time avoiding using chemical agents or reducing the usage amount of chemical agents and reducing the water consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the process route diagram of the cleaning method of polyester fabrics provided by the embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of a cleaning device provided by an alternative embodiment of the present invention.

[0035] Explanation of the reference numerals in the drawings:

[0036] 1. Water bath device; 2. Cleaning component; 3. Stirring component; 4. Micro-nano bubble generating device; 5. Water inlet pipe; 6. Water outlet pipe; 7. Perforated plate; 8. Temperature control system. Specific embodiments

[0037] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully communicated to those skilled in the art.

[0038] In the following description, certain specific details are set forth for the purpose of explaining various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0039] References to "an embodiment" or "one embodiment" throughout the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in an embodiment" or "in one embodiment" throughout the specification need not all refer to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0040] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, terms such as "front", "rear", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as limiting terms.

[0041] An embodiment of the present invention provides a method for cleaning polyester fabrics, the method comprising the following steps:

[0042] Step 11, placing the polyester fabric to be cleaned in a cleaning device, after heating to a first preset temperature, introducing cleaning water and performing cleaning, dehydration, and drying treatments, where the cleaning water is micro-nano bubble water.

[0043] In this embodiment, micro-nano bubble water (dissolving micro-nano bubbles into the cleaning water) is introduced into the polyester fabric to be cleaned for cleaning. Utilizing the advantages of small size, high specific surface area, and high surface activity of micro-nano bubbles, and being able to generate strong cavitation effects and oxidation effects in water, it can effectively decompose and remove the oil stains and impurities on the fiber surface, efficiently remove the oil and impurity components from the internal pores of the polyester fabric fibers, further improve the cleaning efficiency, and obtain high-quality polyester; at the same time, various cleaning reagents can be avoided to reduce water pollution.

[0044] During this cleaning process, preferably, the first preset temperature can be set to 60°C, and the cleaning duration can be set to 10 minutes to ensure sufficient soaking of the fabric.

[0045] In an alternative embodiment of the present invention, the ratio of the polyester fabric to be cleaned to the cleaning water is 1:20 to ensure the cleaning efficiency.

[0046] During the cleaning process provided in the above embodiment, the micro-nano bubble water is formed by combining micro-nano bubbles entering the cleaning device in a continuous flow manner with the cleaning water, and the micro-nano bubbles are generated by a micro-nano bubble generating device; preferably, the air inlet source of the micro-nano bubble generating device is air, oxygen, nitrogen, etc.

[0047] The micro-nano bubble generating device can generate micro-nano bubbles through the principle of pressurized dissolved gas decompression release. Specifically: the water and gas are mixed by a pressurized dissolved gas pump and decompressed and released, and the gas precipitates to form a large number of uniform micro-nano bubbles; here, the number and particle size of the generated micro-nano bubbles can be controlled by adjusting the gas flow rate and release pressure.

[0048] The micro-nano bubble generating device can also generate micro-nano bubbles by a jet flow method. Specifically: high-speed water flow forms a negative pressure in the ejector to suck in air, and the gas is broken into micro-nano bubbles by the shear force; here, the number and particle size of the generated micro-nano bubbles can be controlled by adjusting the ejector structure and operating conditions.

[0049] Preferably, the micro-nano bubbles include micro-bubbles and / or nano-bubbles; as Figure 2 shown, during the cleaning process, the micro-nano bubble generating device 4 is connected to the cleaning device 1, and micro-bubbles and / or nano-bubbles are continuously introduced into the cleaning device 1 through the micro-nano bubble generating device 4; preferably, the number of micro-bubbles generated by the micro-nano bubble generating device is 1×10 5 ~8×10 6 per milliliter, and the particle size of the micro-bubbles is 20 - 80 μm; the number of nano-bubbles generated by the micro-nano bubble generating device is 1×10 7 ~5×10 8per milliliter, and the particle size of the nano-bubbles is 100 to 200 nanometers to ensure the cleaning efficiency. It should be noted that during the above cleaning process, the particle size and quantity of the micro-nano bubbles generated can be controlled according to the actual cleaning requirements.

[0050] Another embodiment of the present invention provides a method for cleaning polyester fabrics, which includes the following steps:

[0051] Step 21, place the polyester fabric to be cleaned in a cleaning device, after heating to a second preset temperature, introduce cleaning water and a preset chemical agent and perform chemical agent cleaning treatment;

[0052] Step 22, place the polyester fabric after chemical agent cleaning in a cleaning device, after heating to a third preset temperature, introduce cleaning water and a preset acid solution and perform acid cleaning, dehydration and drying treatment; wherein, the cleaning water introduced during chemical agent cleaning and acid cleaning is micro-nano bubble water.

[0053] In this embodiment, the polyester fabric to be cleaned is cleaned twice differently, and different cleaning parameters (cleaning time, temperature, etc.) and cleaning agents (preset chemical agent, preset acid solution, etc.) are set during the cleaning process at different stages to improve the cleaning efficiency;

[0054] Here, the cleaning water introduced during chemical agent cleaning and acid cleaning is micro-nano bubble water (dissolving micro-nano bubbles into the cleaning water). Utilizing the advantages of the micro-nano bubbles themselves, such as small size, high specific surface area and high surface activity, and being able to generate strong cavitation effects and oxidation effects in water, the oil stains and impurities on the fiber surface can be effectively decomposed and removed, and the oil and impurities can be efficiently removed from the internal pores of the polyester fabric fibers, further improving the cleaning efficiency and obtaining high-quality polyester;

[0055] Here, the preset chemical agent is put into the cleaning water, and the preset chemical agent is combined with the micro-nano bubble water to fully remove the oil stains and other stains on the fabric and improve the cleaning efficiency; since the chemical agent is combined with the micro-nano bubble water, compared with traditional cleaning (relying only on chemical reagents or only on micro-nano bubble water), the amount of chemical agent used can be reduced while the cleaning efficiency can be improved during this chemical agent cleaning process; here, the second preset temperature can be 95°, preferably, the cleaning duration can be set to 30 min; by heating and controlling the cleaning duration, the efficiency of chemical agent cleaning is further improved.

[0056] In an optional embodiment of the present invention, the ratio of the polyester fabric to be cleaned to the cleaning water is 1:20; here, it should be noted that the mass ratio of the cleaning water to the polyester fabric during the cleaning process at different stages is 1:20 to ensure the cleaning efficiency.

[0057] In an alternative embodiment of the present invention, the preset chemical agent includes a cylinder cleaning agent, a penetrant, and sodium carbonate. Here, the concentration of the preset chemical agent can be determined based on the sample mass of the polyester fabric to be cleaned; preferably, the ratio concentrations of the cylinder cleaning agent, the penetrant, and sodium carbonate can be 2 g / L, 1 g / L, and 2 g / L, respectively.

[0058] Furthermore, the polyester fabric after chemical agent cleaning is subjected to acid cleaning; a preset acid solution is added to the cleaning water to remove the residual chemical agent on the fabric, and at the same time neutralize the alkaline agent in the chemical agent to avoid damaging the fabric, thereby ensuring the quality of the polyester fabric after cleaning; the preset acid solution is combined with micro-nano bubble water to fully remove the chemical agent on the fabric and improve the cleaning efficiency; here, the third preset temperature can be 50 °C, preferably, the cleaning duration can be set to 10 min; by heating and controlling the cleaning duration, the efficiency of acid cleaning is further improved.

[0059] In an alternative embodiment of the present invention, the preset acid solution is an acetic acid solution; here, the concentration of acetic acid can be prepared according to the pH of the cleaning solution after chemical agent cleaning to neutralize the chemical cleaning agent and keep the pH of the cleaning solution neutral to avoid damaging the fabric; preferably, in an achievable example, the ratio concentration of the acetic acid solution can be 1.0 - 1.5 g / L; here, using acetic acid can not only effectively remove the residual agent, other stains, and neutralize the alkaline agent, but also improve the dyeing performance of the polyester fabric, enhance the wrinkle resistance and washability of the polyester fabric, thereby improving the quality of the polyester fabric after cleaning.

[0060] During the cleaning process of the embodiment provided in the second aspect above, the micro-nano bubble water is formed by combining the micro-nano bubbles entering the cleaning device in a continuous flow manner with the cleaning water, and the micro-nano bubbles are generated by a micro-nano bubble generating device; preferably, the air inlet source of the micro-nano bubble generating device is air, oxygen, nitrogen, etc.

[0061] The micro-nano bubble generating device can generate micro-nano bubbles through the principle of pressurized dissolved gas decompression release. Specifically: the water and gas are mixed by a pressurized dissolved gas pump and decompressed and released, and the gas precipitates to form a large number of uniform micro-nano bubbles; here, the number and particle size of the micro-nano bubbles generated can be controlled by adjusting the gas flow rate and release pressure.

[0062] The micro-nano bubble generating device can also generate micro-nano bubbles by a jet flow method. Specifically: high-speed water flow is used to form a negative pressure in the jet injector to suck in air, and the gas is broken into micro-nano bubbles by the shear force; here, the number and particle size of the micro-nano bubbles generated can be controlled by adjusting the structure of the jet injector and the operating conditions.

[0063] Preferably, the micro-nano bubbles include micro-bubbles and / or nano-bubbles; such asFigure 2 As shown, during the cleaning process, the micro-nano bubble generating device 4 is connected to the cleaning device 1, and micron bubbles and / or nano bubbles are continuously introduced into the cleaning device 1 through the micro-nano bubble generating device 4; preferably, the number of micron bubbles generated by the micro-nano bubble generating device is 1×10 5 ~8×10 6 ~ per milliliter, and the particle size of the micron bubbles is 20~80μm; the number of nano bubbles generated by the micro-nano bubble generating device is 1×10 7 ~5×10 8 per milliliter, and the particle size of the nano bubbles is 100~200 nanometers to ensure the cleaning efficiency. It should be noted that during the above cleaning process, the particle size and quantity of the micro-nano bubbles generated can be controlled according to the actual cleaning requirements.

[0064] In an alternative embodiment of the present invention, after the chemical agent cleaning, it may further include:

[0065] Step 21-1, placing the polyester fabric after chemical agent cleaning in the cleaning device, and after heating to the first set temperature, introducing cleaning water and performing a cleaning process; the cleaning water here is also micro-nano bubble water.

[0066] In this embodiment, only micro-nano bubble water is introduced for cleaning the polyester fabric after chemical agent cleaning. On the one hand, it is to remove the excess chemical agent to ensure the efficiency of subsequent acid cleaning. On the other hand, the inherent properties of the micro-nano bubbles are utilized to consolidate the chemical agent cleaning process and improve the efficiency of oil stain removal; here, the first set temperature can be 60°~80°, preferably, the cleaning duration can be set to 10 minutes to ensure the cleaning efficiency.

[0067] In an alternative embodiment of the present invention, after the acid cleaning, it may further include:

[0068] Step 22-1, placing the polyester fabric after acid cleaning in the cleaning device, and after heating to the second set temperature, introducing cleaning water and performing a cleaning process; the cleaning water here is also micro-nano bubble water.

[0069] In this embodiment, only micro-nano bubble water is introduced for the polyester fabric after acid cleaning. On the one hand, it removes the excess acid solution, and on the other hand, it can also consolidate the acid cleaning process, thereby ensuring the quality of the polyester fabric after cleaning; here, the second set temperature can be 60°, and the cleaning duration can be set to 10 minutes to ensure the cleaning efficiency.

[0070] Please refer to Figure 1 , yet another embodiment of the present invention provides a cleaning method for polyester fabric, including the following steps:

[0071] Step 31: Place the polyester fabric to be cleaned in the cleaning device. After heating to the fourth preset temperature, introduce cleaning water and perform a primary cleaning process.

[0072] Step 33: Place the polyester fabric to be cleaned in the cleaning device. After heating to the fifth preset temperature, introduce cleaning water and a preset chemical agent and perform a chemical agent cleaning process.

[0073] Step 33: Place the polyester fabric after chemical agent cleaning in the cleaning device. After heating to the sixth preset temperature, introduce cleaning water and a preset acid solution and perform acid cleaning, dehydration, and drying processes; wherein, the cleaning water introduced in the primary cleaning, chemical agent cleaning, and acid cleaning is all micro-nano bubble water.

[0074] In this embodiment, the polyester fabric to be cleaned is subjected to three different cleanings, and different cleaning parameters (cleaning time, temperature, etc.) and cleaning agents (preset chemical agent, preset acid solution, etc.) are set during the cleaning processes at different stages to improve the cleaning efficiency.

[0075] Here, the cleaning water introduced in the primary cleaning, chemical agent cleaning, and acid cleaning is all micro-nano bubble water (dissolve micro-nano bubbles into the cleaning water). Utilize the advantages of small size, high specific surface area, and high surface activity of micro-nano bubbles, and they can produce strong cavitation effects and oxidation effects in water, thereby effectively decomposing and removing the oil stains and impurities on the fiber surface, efficiently removing the oil and impurity components from the internal pores of the polyester fabric fibers, further improving the cleaning efficiency, and obtaining high-quality polyester.

[0076] During the primary cleaning, only introduce micro-nano bubble water for cleaning to fully dissolve the oil stains in the polyester fabric through the micro-nano bubble water to ensure the efficiency of subsequent cleaning steps; here, the fourth preset temperature can be 60 °C, and preferably, the cleaning duration can be set to 10 min to ensure sufficient soaking of the fabric.

[0077] Furthermore, perform chemical agent cleaning on the polyester fabric after the primary cleaning; put the preset chemical agent into the cleaning water, and the preset chemical agent combines with the micro-nano bubble water to fully remove the oil stains on the fabric and improve the cleaning efficiency; since the fabric has been cleaned with micro-nano bubble water once, compared with traditional cleaning, the use of chemical agents can be reduced during this chemical agent cleaning process, and the cleaning efficiency can be improved; here, the fifth preset temperature can be 95 °C, and preferably, the cleaning duration can be set to 30 min; by controlling heating and cleaning duration, further improve the efficiency of chemical agent cleaning.

[0078] In an alternative embodiment of the present invention, the preset chemical agents include a cylinder cleaner, a penetrant, and sodium carbonate. Here, the concentration of the preset chemical agents can be determined based on the sample mass of the polyester fabric to be cleaned; preferably, in an achievable example, the concentration ratios of the cylinder cleaner, the penetrant, and sodium carbonate can be 2 g / L, 1 g / L, and 2 g / L respectively to ensure that the oil stains on the fabric can be fully removed.

[0079] Further, the polyester fabric after chemical agent cleaning is subjected to acid cleaning; the preset acid solution is added to the cleaning water to remove the residual chemical agents on the fabric and at the same time neutralize the alkaline agents in the chemical agents to avoid damaging the fabric, thereby ensuring the quality of the polyester fabric after cleaning; the preset acid solution is combined with micro-nano bubble water to fully remove the chemical agents on the fabric and improve the cleaning efficiency; here, the sixth preset temperature can be 50 °C, preferably, the cleaning duration can be set to 10 min; through heating and cleaning duration control, the acid cleaning efficiency is further improved.

[0080] In an alternative embodiment of the present invention, the preset acid solution is an acetic acid solution; here, the concentration of acetic acid can be formulated according to the pH of the cleaning solution after chemical agent cleaning to neutralize the chemical cleaning agents and keep the pH of the cleaning solution neutral to avoid damaging the fabric; preferably, in an achievable example, the concentration ratio of the acetic acid solution can be 1.0 - 1.5 g / L; here, using acetic acid can not only effectively remove the residual agents, other stains, and neutralize the alkaline agents, but also improve the dyeing performance of the polyester fabric, enhance the wrinkle resistance and washability of the polyester fabric, and thereby improve the quality of the polyester fabric after cleaning.

[0081] In an alternative embodiment of the present invention, the ratio of the polyester fabric to be cleaned to the cleaning water is 1:20; here, it should be noted that the mass ratio of the cleaning water to the polyester fabric in the cleaning process at different stages is 1:20 to ensure the cleaning efficiency.

[0082] In the above cleaning process, the micro-nano bubble water is formed by combining the micro-nano bubbles entering the cleaning device in a continuous flow manner with the cleaning water, and the micro-nano bubbles are generated by a micro-nano bubble generating device; preferably, the air inlet source of the micro-nano bubble generating device is air, oxygen, nitrogen, etc.

[0083] The micro-nano bubble generating device can generate micro-nano bubbles through the principle of pressurized dissolved gas decompression release. Specifically: the water and gas are mixed by a pressurized dissolved gas pump and decompressed and released, and the gas precipitates to form a large number of uniform micro-nano bubbles; here, the number and particle size of the micro-nano bubbles generated can be controlled by adjusting the gas flow rate and release pressure.

[0084] The micro-nano bubble generating device can also generate micro-nano bubbles by jetting. Specifically: high-speed water flow is used to form negative pressure in the jet device to suck in air, and the gas is broken into micro-nano bubbles by shear force; here, the number and particle size of the generated micro-nano bubbles can be controlled by adjusting the structure and operating conditions of the jet device.

[0085] Preferably, the micro-nano bubbles include micro-bubbles and / or nano-bubbles; as Figure 2 shown, during the cleaning process, the micro-nano bubble generating device 4 is connected to the cleaning device 1, and micro-bubbles and / or nano-bubbles are continuously introduced into the cleaning device 1 through the micro-nano bubble generating device 4; preferably, the number of micro-bubbles generated by the micro-nano bubble generating device is 1×10 5 ~8×10 6 bubbles per milliliter, and the particle size of the micro-bubbles is 20~80μm; the number of nano-bubbles generated by the micro-nano bubble generating device is 1×10 7 ~5×10 8 bubbles per milliliter, and the particle size of the nano-bubbles is 100~200 nanometers to ensure the cleaning efficiency. It should be noted that during the above cleaning process, the particle size and number of the generated micro-nano bubbles can be controlled according to the actual cleaning requirements.

[0086] The cleaning method provided by the above embodiments of the present invention, compared with traditional clean water cleaning and chemical cleaning, adding micro-nano bubbles in chemical cleaning and acid cleaning can not only significantly improve the cleaning efficiency, but also reduce water resource consumption and chemical agent use, thereby reducing the environmental pollution risk. This technology can not only meet the needs of high-quality polyester production, but also promote the development of the polyester manufacturing industry towards the green and sustainable direction, and has broad application prospects.

[0087] In an alternative embodiment of the present invention, after the chemical agent cleaning, it may further include:

[0088] Step 32-1, placing the polyester fabric after chemical agent cleaning in the cleaning device, and after heating to the first set temperature, introducing cleaning water and performing cleaning treatment; the cleaning water here is also micro-nano bubble water.

[0089] In this embodiment, only micro-nano bubble water is introduced for cleaning the polyester fabric after chemical agent cleaning. On the one hand, it is to remove the excess chemical agent to ensure the efficiency of subsequent acid cleaning. On the other hand, the self-properties of micro-nano bubbles are used to consolidate the chemical agent cleaning process and improve the efficiency of oil stain removal; here, the first set temperature can be 60°~80°, and preferably, the cleaning duration can be set to 10 minutes to ensure the cleaning efficiency.

[0090] In an alternative embodiment of the present invention, after the acid cleaning, it may further include:

[0091] Step 33-1: Place the acid-cleaned polyester fabric in a cleaning device, and after heating to a second set temperature, introduce cleaning water and perform a cleaning process; the cleaning water here is also micro-nano bubble water.

[0092] In this embodiment, only micro-nano bubble water is introduced into the acid-cleaned polyester fabric. On the one hand, it removes the excess acid solution, and on the other hand, it can consolidate the acid cleaning process, thereby ensuring the quality of the polyester fabric after cleaning; here, the second set temperature can be 60°, and the cleaning duration can be set to 10 minutes to ensure the cleaning efficiency.

[0093] As Figure 2 shown, in an alternative embodiment of the present invention, the cleaning device used in the above cleaning process includes a water bath device 1, a micro-nano bubble generating device 4, and a temperature control system 8. Among them, a cleaning component 2 for holding the polyester fabric to be cleaned is placed in the water bath device 1; the micro-nano bubble generating device 4 and the cleaning component 2 are respectively connected through a water inlet pipe 5 and a water outlet pipe 6, and the micro-nano bubble generating device 4 is used to generate and supply micro-nano bubbles to the cleaning component 2; the temperature control system 8 is arranged at the bottom of the water bath device 1 and is used to control the temperature inside the water bath device 1.

[0094] In this embodiment, the micro-nano bubble generating device 4 is connected to the cleaning component 2 in the water bath device 1 to provide micro-nano bubbles at different cleaning stages; here, the water bath device 1 can be a water bath pot; the micro-nano bubble generating device 4 can be a pressurized dissolved air device that generates micro-nano bubbles by the method of pressurized dissolved air decompression, or a jet device that generates micro-nano bubbles by the hydraulic shearing action;

[0095] Here, the cleaning component 2 is fixedly connected to the bottom of the water bath device 1, and an open-hole lid is provided at its top to facilitate connection with the micro-nano bubble generating device 4 through the water inlet pipe 5 and the water outlet pipe 6. Preferably, the cleaning component 2 can be a customized stainless steel container; more preferably, the cleaning component 2 can be set as a cylinder with a height of 14 cm, an inner diameter of 12 cm, and a wall thickness of 3 mm;

[0096] The temperature control system 8 is arranged at the bottom of the water bath device 1. Preferably, the temperature control system 8 can include a temperature sensor and a heating coil, and the temperature sensor and the heating coil jointly realize the control of the temperature inside the water bath device 1; preferably, during the cleaning process, the heating rate of the water bath device 1 can be set to 3°C / min.

[0097] In an alternative embodiment of the present invention, a perforated plate 7 is arranged in the cleaning component 2; among them, the perforated plate 7 is used to place the polyester fabric to be cleaned, and the stirring component 3 is used to stir and oscillate the cleaning water.

[0098] In this embodiment, a plurality of holes are evenly formed in the porous plate 7, and the porous plate 7 is fixed at the middle position of the cleaning assembly 2. Preferably, the porous plate 7 can be fixed 5 cm away from the bottom of the cleaning assembly 2. Here, the inner diameter of the porous plate 7 is the same as that of the cleaning assembly 2 to prevent the polyester fabric from sliding down to the bottom of the cleaning assembly along the gap between the porous plate 7 and the cleaning assembly 2 during the cleaning process.

[0099] The holes provided on the porous plate 7 can penetrate the water inlet pipe 5 and the water outlet pipe 6. One end of the water inlet pipe 5 passes through the porous plate 7 from below the porous plate 7 in the cleaning assembly 2 and is connected to the micro-nano bubble generating device 4 through the opening lid at the top of the cleaning assembly 2. The water outlet pipe 6 passes through the opening lid and the porous plate 7 from the micro-nano bubble generating device 4 and is connected to the inside of the cleaning assembly 2.

[0100] During the actual cleaning process, the micro-nano bubble generating device 4 can operate in a continuous mode (continuously generating micro-nano bubbles) or in an intermittent mode (intermittently generating micro-nano bubbles), such as operating for 5 minutes and then stopping for 5 minutes. Here, continuous operation or intermittent operation can be selected according to the actual cleaning requirements.

[0101] The above cleaning device further includes a shaking assembly 3 disposed on one side of the water bath device 1. The shaking assembly 3 can be an electric stirring blade. One end of the shaking assembly 3 is fixedly connected to the lid at the top of the cleaning assembly 2, and the other end passes through the lower part of the porous plate 7 to stir the cleaning water in the cleaning assembly 2 by oscillation to improve the cleaning efficiency and avoid damaging the polyester fabric. Optionally, during the cleaning process, the oscillation rate of the shaking assembly 3 can be set to 200 revolutions per minute.

[0102] The following will specifically illustrate the cleaning method provided in the above embodiment with specific comparative examples. In the following examples, the polyester fabrics to be cleaned are all 10 g, and are all treated with Klüber knitting machine oil and placed for 24 hours under standard environmental relative humidity (65 ± 2%) and temperature (27 ± 20°C). Specifically:

[0103] Comparative Example 1, the cleaning process is as follows:

[0104] 1) Put the polyester fabric to be cleaned into the cleaning assembly 2. The cleaning assembly 2 is placed in the water bath device 1, and water is added according to a bath ratio of 1:20. The water bath is heated to 60°C and oscillated for cleaning for 10 minutes. Then the polyester fabric is taken out to prepare for the next stage of cleaning.

[0105] 2) Put the polyester fabric after being cleaned in step 1) into the cleaning component 2 again, add three kinds of mixed chemical agents according to a bath ratio of 1:20. Place the cleaning component 2 in the water bath device 1, heat the water bath to 95 °C, and oscillate and clean for 30 minutes; then take out the polyester fabric to prepare for the next stage of cleaning.

[0106] 3) Put the polyester fabric after chemical cleaning in step 2) into the cleaning component 2 again, add glacial acetic acid solution according to a bath ratio of 1:20. Heat the water bath to 50 °C, and oscillate and clean for 10 minutes; then take out the polyester fabric to prepare for the next stage of cleaning.

[0107] 4) Put the polyester fabric after acid cleaning in step 3) into the cleaning component 2 again, add water according to a bath ratio of 1:20. Heat the water bath to 60 °C, and oscillate and clean for 10 minutes; then take out the polyester fabric and dehydrate and dry it to obtain the completely cleaned polyester fabric.

[0108] In each of the above steps, the shaking component 3 runs continuously and oscillates at a rate of 200 revolutions per minute to perform sufficient oscillating cleaning; the micro-nano bubble release pressure of the micro-nano bubble generating device is 0.6 MPa, and the micro-nano bubble flow rate is 20 mL / min to generate stable micro-nano bubble water; here, the micro-nano bubble generating device adopts a continuous operation mode to generate micro-nano bubbles during the oscillating cleaning process;

[0109] For Comparative Example 2, the cleaning process is as follows:

[0110] 1) Put the polyester fabric to be cleaned into the cleaning component 2. Place the cleaning component 2 in the water bath device 1, add water according to a bath ratio of 1:20, heat the water bath to 60 °C, and oscillate and clean for 10 minutes; then take out the polyester fabric to prepare for the next stage of cleaning.

[0111] 2) Put the polyester fabric after being cleaned in step 1) into the cleaning component 2 again. Place the cleaning component 2 in the water bath device 1, add three kinds of mixed agents according to a bath ratio of 1:20, heat the water bath to 95 °C, and oscillate and clean for 30 minutes; then take out the polyester fabric to prepare for the next stage of cleaning.

[0112] 3) Put the polyester fabric after chemical cleaning in step 2) into the cleaning component 2 again, add glacial acetic acid solution according to a bath ratio of 1:20. Heat the water bath to 50 °C, and oscillate and clean for 10 minutes; then take out the polyester fabric to prepare for the next stage of cleaning.

[0113] 4) Put the polyester fabric after acid cleaning in step 3) into the cleaning component 2 again, add water according to a bath ratio of 1:20. Heat the water bath to 60 °C, and oscillate and clean for 10 minutes; then take out the polyester fabric and dehydrate and dry it to obtain the completely cleaned polyester fabric.

[0114] In each of the above steps, the shaking component 3 continuously operates and oscillates at a rate of 200 revolutions per minute for sufficient oscillating cleaning; the micro-nano bubble release pressure of the micro-nano bubble generating device is 0.6 MPa and the micro-nano bubble flow rate is 20 mL / min to generate stable micro-nano bubble water; here, the micro-nano bubble generating device adopts an intermittent operation mode of 5 minutes on / 5 minutes off during the oscillating cleaning process to generate micro-nano bubbles.

[0115] For Comparative Example 3, the cleaning process is as follows:

[0116] 1) Place the polyester fabric to be cleaned into the cleaning component 2. The cleaning component 2 is placed in the water bath device 1 and water is added according to a bath ratio of 1:10. The water bath is heated to 60 °C and oscillating cleaning is carried out for 5 minutes. Then take out the polyester fabric to prepare for the next stage of cleaning.

[0117] 2) Place the polyester fabric cleaned in step 1) into the cleaning component 2, add three kinds of mixed agents according to a bath ratio of 1:10. The cleaning component 2 is placed in the water bath device 1, heated to 95 °C, and oscillating cleaning is carried out for 15 minutes. Then take out the polyester fabric to prepare for the next stage of cleaning.

[0118] 3) Place the polyester fabric chemically cleaned in step 2) into the cleaning component 2 again, add glacial acetic acid solution according to a bath ratio of 1:10, heat to 50 °C, and oscillating cleaning is carried out for 5 minutes. Then take out the polyester fabric to prepare for the next stage of cleaning.

[0119] 4) Place the polyester fabric acid-cleaned in step 3) into the cleaning component 2 again, add water according to a bath ratio of 1:10, heat the water bath to 60 °C, and oscillating cleaning is carried out for 5 minutes. Then take out the polyester fabric and dehydrate and dry it to obtain the completely cleaned polyester fabric.

[0120] In each of the above steps, the stirring component 3 continuously operates and oscillates at a rate of 200 revolutions per minute for sufficient oscillating cleaning; the micro-nano bubble release pressure of the micro-nano bubble generating device is 0.6 MPa and the micro-nano bubble flow rate is 20 mL / min to generate stable micro-nano bubble water; here, the micro-nano bubble generating device adopts a continuous operation mode during the oscillating cleaning process.

[0121] The following Table 1 shows the comparison of the oil cleaning results of the above different comparative examples and the conventional clean water cleaning process for polyester fabrics:

[0122] Table 1. Comparison table of cleaning results of different cleaning processes

[0123]

[0124]

[0125] It can be seen from the data in Table 1 that compared with the conventional method, the mass loss rate of the sample in the micro-nano bubble polyester cleaning method provided by the present invention is significantly increased, and the oil removal rate is significantly increased, which proves that the micro-nano bubble cleaning method for polyester has better cleaning efficiency for oil stains; while using the intermittent mode of micro-nano bubbles for cleaning, the cleaning effect is not as good as that of the continuous mode; shortening the cleaning process by 50% is based on the continuous mode of micro-nano bubbles, and the cleaning water consumption, chemical dosage, and cleaning time are all reduced by half, but still achieve good oil stain removal effect, which proves that micro-nano bubble cleaning has very good application prospects in terms of energy consumption saving and green low-carbon.

[0126] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for cleaning polyester fabric, characterized in that: The following steps are involved: The polyester fabric to be cleaned is placed in a cleaning device, and after the temperature is raised to a first preset temperature, cleaning water is introduced and cleaning, dehydration and drying are performed, wherein the cleaning water is micro-nano bubble water.

2. A method for cleaning polyester fabric, characterized in that: The following steps are involved: Placing the polyester fabric to be cleaned in the cleaning device, and after heating to a second preset temperature, introducing cleaning water and preset chemical agents and performing chemical cleaning treatment; The polyester fabric after the chemical cleaning is placed in a cleaning device, and after the temperature is raised to a third preset temperature, cleaning water and a preset acid solution are introduced to perform acid cleaning, dehydration and drying treatments; wherein the cleaning water introduced in the chemical cleaning and the acid cleaning is micro-nano bubble water.

3. A method for cleaning polyester fabric, characterized in that: The following steps are involved: Placing the polyester fabric to be cleaned in the cleaning device, and after heating to a fourth preset temperature, introducing cleaning water and performing a cleaning process; Placing the polyester fabric after the primary cleaning in a cleaning device, and after heating to a fifth preset temperature, introducing cleaning water and preset chemical agents and performing chemical cleaning treatment; The polyester fabric after the chemical cleaning is placed in a cleaning device, and after the temperature is raised to a sixth preset temperature, cleaning water and a preset acid solution are introduced and acid cleaning, dehydration and drying are performed. The cleaning water introduced in the primary cleaning, the chemical cleaning and the acid cleaning is all micro-nano bubble water.

4. The method for cleaning polyester fabric according to claim 2 or 3, characterized in that: After the chemical cleaning, the method further comprises: The polyester fabric cleaned with the chemical agent is placed in a cleaning device, and after the temperature is raised to a first set temperature, cleaning water is introduced and the cleaning process is performed; wherein the cleaning water introduced during the cleaning process is micro-nano bubble water.

5. The method for cleaning polyester fabric according to claim 2 or 3, characterized in that: After the acid cleaning, the method further comprises: The acid-cleaned polyester fabric is placed in a cleaning device, and after the temperature is raised to a second set temperature, cleaning water is introduced and cleaning treatment is performed, wherein the cleaning water introduced during the cleaning process is micro-nano bubble water.

6. The method for cleaning polyester fabric according to claim 2 or 3, characterized in that: The preset chemical agents include a cleaning agent, a penetrant and sodium carbonate; the preset acid solution is a glacial acetic acid solution; Optionally, the ratio concentration of the glacial acetic acid solution is 1.0-1.5 g / L.

7. The method for cleaning polyester fabric according to any one of claims 1 to 3, characterized in that: The mass ratio of the polyester fabric to be cleaned to the cleaning water is 1:

20.

8. The method for cleaning polyester fabric according to any one of claims 1 to 7, characterized in that: The micro-nano bubble water is formed by combining micro-nano bubbles entering the cleaning device in a continuous flow manner with cleaning water, and the micro-nano bubbles are generated by a micro-nano bubble generating device; Optionally, the micro-nano bubbles include micron bubbles and / or nano bubbles; Optionally, the cleaning device used in the cleaning process includes: A water bath device (1), wherein a cleaning component (2) for holding polyester fabric to be cleaned is placed in the water bath device (1); a micro-nano bubble generating device (4), the micro-nano bubble generating device (4) being connected to the cleaning component (2) via a water inlet pipe (5) and a water outlet pipe (6), respectively, and the micro-nano bubble generating device (4) being used to generate and provide micro-nano bubbles to the cleaning component (2); and A temperature control system (8), the temperature control system (8) being arranged at the bottom of the water bath device (1) and being used for controlling the temperature in the water bath device (1); Optionally, the cleaning component (2) is provided with a shaking component (3) and a porous plate (7); wherein the porous plate (7) is used to place the polyester fabric to be cleaned, and the shaking component (3) is used to stir and oscillate the cleaning water; Optionally, during the cleaning process, the shaking assembly (3) has an oscillation rate of 200 revolutions per minute.

9. The method for cleaning polyester fabric according to claim 8, characterized in that: The number of micron bubbles generated by the micro-nano bubble generating device is 1×10 5 ~8×10 6 / ml, and the particle size of the micron bubbles is 20-80 μm.

10. The method for cleaning polyester fabric according to claim 8, characterized in that: The number of nanobubbles generated by the micro-nano bubble generating device is 1×10 7 ~5×10 8 The nanobubbles have a particle size of 100 to 200 nanometers.

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