Medical washable high-temperature-resistant modified polyester fiber fabric and preparation method thereof

Abstract

The invention discloses a medical washable high-temperature-resistant modified polyester fiber fabric and a preparation method thereof, and relates to the technical field of fabrics. The medical washable high-temperature-resistant modified polyester fiber fabric prepared by the invention is obtained by blending, spinning and weaving modified polyester and modified mica and activating with sodium hypochlorite; the modified polyester is obtained by grafting organic silicon modified polyester with n-dodecanethiol and then reacting with bromooctylhydantoin; the modified mica is prepared by polymerizing diethyl phosphite and bisphenol S on the surface of the pretreated mica, grafting a vinyl monomer and then reducing; the vinyl monomer is obtained by carrying out a reaction on 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt, and the vinyl monomer is obtained by carrying out a reaction on 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt; the medical washable high-temperature-resistant modified polyester fiber fabric prepared by the invention has good antibacterial, anti-aging and flame-retardant properties.

Description

Technical Field

[0001] The present invention relates to the technical field of fabrics, in particular to a medical washable and high-temperature resistant modified polyester fiber fabric and a preparation method thereof. Background Art

[0002] As a synthetic fiber material, polyester fiber is widely used in the textile field due to its excellent physical and chemical properties. Its main advantages include high strength, abrasion resistance, wrinkle resistance, corrosion resistance, good dimensional stability and easy care properties. These properties make it an ideal choice for medical textiles such as medical protective clothing, surgical gowns, and bed sheets.

[0003] However, the inherent defects of polyester fiber also limit its further development in the medical field. The surface of polyester fiber is smooth and lacks antibacterial function, which makes it easy to adsorb bacteria and viruses. Especially in highly polluted environments, ordinary polyester fabrics cannot effectively inhibit the growth of microorganisms, increasing the risk of cross-infection; in addition, polyester fiber is prone to thermal degradation at high temperatures, resulting in reduced strength and structural damage, and medical disinfection often requires high-temperature and high-pressure sterilization (such as 121°C steam sterilization) or ultraviolet disinfection. Repeated washing, high-temperature treatment, and light exposure will significantly reduce the durability of the fabric and shorten its service life; more noteworthy is that ordinary polyester fiber is prone to melt and drip when encountering open flames, which may cause secondary damage or spread of fire. Therefore, it is urgent to improve its flame retardancy through modification technology.

[0004] In summary, the application of traditional polyester fibers in the medical field is subject to multiple limitations, such as insufficient antibacterial properties, poor washability and high-temperature resistance, and lack of flame retardancy. The strict requirements of the medical environment for hygiene and safety, repeated disinfection, and long-term performance have prompted researchers to use chemical modification methods to give polyester fibers composite functions such as long-lasting antibacterial, high-temperature sterilization resistance, and flame retardancy while retaining the original advantages of polyester fibers, so as to meet the dual needs of safety and practicality of medical textiles. Summary of the Invention

[0005] The purpose of the present invention is to provide a medical washable and high-temperature resistant modified polyester fiber fabric and a preparation method thereof, so as to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A method for preparing a medical washable and high-temperature resistant modified polyester fiber fabric comprises the following steps:

[0008] (1) reacting D4 and tetramethyltetravinylcyclotetrasiloxane to obtain terminal hydroxyl silicone oil; reacting dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil to obtain organosilicon-modified polyester;

[0009] (2) reacting organosilicon-modified polyester and n-dodecyl mercaptan to obtain thioether polyester;

[0010] (3) reacting thioether polyester and bromooctyl hydantoin to obtain modified polyester;

[0011] (4) reacting 2,4-dinitroaniline, hydrochloric acid, and sodium nitrite to obtain an azo salt; reacting 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt to obtain a vinyl monomer;

[0012] (5) reacting mica with vinyltrimethoxysilane to obtain vinyl mica; reacting vinyl mica with p-hydroxystyrene to obtain pretreated mica; reacting pretreated mica with diethyl phosphite and bisphenol S to obtain phosphate mica;

[0013] (6) reacting phosphate mica and vinyl monomer to obtain pre-modified mica; reducing the pre-modified mica to obtain modified mica;

[0014] (7) The modified polyester and modified mica are melt-blended and spun to obtain modified polyester, which is then woven and activated with sodium hypochlorite to obtain medical washable and high-temperature resistant modified polyester fiber fabric.

[0015] As an optimization, the preparation method of the organosilicon-modified polyester in step (1) is as follows: D4, tetramethyltetravinylcyclotetrasiloxane, and tetramethylammonium hydroxide are mixed in a mass ratio of (90-95): (5-10): (0.5-1.0), and saturated water vapor is introduced at a saturated water vapor flow rate of 0.005m 3 / h, heating to 150-180°C, stirring for reaction for 3-4h, and distilling under reduced pressure to obtain terminal hydroxyl silicone oil; dimethyl terephthalate, ethylene glycol, and zinc acetate are mixed, heated to 180-190°C under nitrogen protection, reacted for 3-4h, methanol is distilled off, terminal hydroxyl silicone oil and antimony trioxide are added, and the mixture is heated to 240-260°C under a vacuum of 100 Pa. After reacting for 2-3h, the mixture is dissolved in acetone, filtered, and concentrated under reduced pressure to obtain an organosilicon-modified polyester; the mass ratio of dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil is 100:(35-45):(1-3), the mass of zinc acetate is 0.2% of dimethyl terephthalate; the mass of antimony trioxide is 0.1% of dimethyl terephthalate; and the D4 is octamethylcyclotetrasiloxane.

[0016] As an optimization, the preparation method of the thioether polyester in step (2) is as follows: dissolving the organosilicon-modified polyester in toluene at 60-70° C., adding n-dodecanethiol and a photoinitiator 2,2-dimethoxy-2-phenylacetophenone, continuing to stir for 30-40 minutes to mix, and then performing the reaction at a wavelength of 365 nm and a power of 15-30 mW / cm 2Under ultraviolet light irradiation, the reaction system is 5-10 cm away from the light source, and the reaction is continuously stirred at 25-40°C for 1-3 hours. The ultraviolet lamp is turned off, and 0.1% antioxidant butylhydroxytoluene by mass of the silicone-modified polyester is added. Cold methanol at 0-5°C is used for precipitation, and the thioether polyester is obtained by filtration, washing with methanol, and drying. The mass ratio of the pre-modified polyester, n-dodecyl mercaptan, photoinitiator, toluene, and antioxidant is 10:(2-5):(0.1-0.2):(300-500):(0.001-0.002).

[0017] As an optimization, the preparation method of the modified polyester in step (3) is as follows: 5,5-dimethylhydantoin is added to an anhydrous potassium carbonate-acetone dispersion, refluxed for 30-50 minutes, and then 1,8-bromooctane is added, and refluxed for 20-24 hours to obtain bromooctylhydantoin; the mass ratio of 5,5-dimethylhydantoin, anhydrous potassium carbonate, acetone, and 1,8-bromooctane is 1:(4-5):(80-90):(6-7); the thioether polyester is dissolved in N,N-dimethylformamide at 60-70°C, bromooctylhydantoin and silver tetrafluoroborate are added, and the mixture is reacted under nitrogen protection for 10-12 hours, and the modified polyester is obtained by precipitation with cold methanol at 0-5°C, filtration, washing, and drying; the mass ratio of thioether polyester, N,N-dimethylformamide, bromooctylhydantoin, and silver tetrafluoroborate is 10:(200-300):(2-3):(0.1-0.2).

[0018] As an optimization, the preparation method of the vinyl monomer in step (4) is as follows: 2,4-dinitroaniline, pure water, and 4 mol / L hydrochloric acid are mixed in a mass ratio of 1: (30-40): (6-7), cooled to 0-5°C, 0.15 g / mL sodium nitrite aqueous solution of 5-6 times the mass of 2,4-dinitroaniline is added, stirring is continued for 40-50 minutes, and stored in the dark at 0-5°C to obtain an azo salt solution; 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone is dissolved in 0-5°C ice water to obtain pyridine The ketone solution is prepared by adding sodium carbonate to adjust the pH to 8-9; the azo salt solution is added dropwise to the pyridone solution at a dropping rate of 0.4-0.6 mL / min, and the reaction is stirred for 2-3 hours, while maintaining the temperature of the reaction system at 5-10°C. The pH is adjusted to 2-3 with concentrated hydrochloric acid, and the reaction is allowed to stand in an ice bath for 1-2 hours. The mixture is filtered, washed with ice water and 0-5°C cold ethanol, and recrystallized from an ethanol-water solution (ethanol: pure water volume ratio of 1:3) to obtain a vinyl monomer; the mass ratio of the pyridone solution, ice water, and azo salt solution is 1:(20-30):(0.5-0.6).

[0019] As an optimization, the preparation method of the phosphate mica in step (5) is as follows: mica, vinyl trimethoxysilane, ethanol, and pure water are mixed in a mass ratio of 1: (1.5-2.5): (5-6): (10-12), hydrochloric acid is used to adjust the pH to 4, the temperature is raised to 50-80 ° C. and the reaction is carried out for 7-8 hours, and the vinyl mica is obtained by filtering, washing, and drying. Under nitrogen protection, vinyl mica, p-hydroxystyrene, N, N-dimethylformamide, and azobisisobutyronitrile are mixed in a mass ratio of 1: (2-3): (2 0-30):(0.01-0.02), heated to 75-85 ° C for reaction 5-6h, filtered, washed and dried to obtain pretreated mica; pretreated mica, N, N-dimethylformamide, diethyl phosphite, bisphenol S and potassium carbonate were mixed in a mass ratio of 1:(20-30):(0.5-0.6):(0.8-1.0):(0.05-0.08), heated to 110-120 ° C under argon protection for reaction 5-6h, filtered, washed and dried to obtain phosphate mica.

[0020] As an optimization, the preparation method of the modified mica in step (6) is as follows: phosphate mica, vinyl monomer, cesium carbonate, and dimethyl sulfoxide are mixed in a mass ratio of 1: (0.8-1.0): (0.1-0.2): (20-30), heated to 50-60 ° C and reacted for 6-7 hours under nitrogen protection. After the reaction is completed, the pre-modified mica is obtained by filtering, washing, and drying; the pre-modified mica, tetrahydroxydiboron, 4,4'-bipyridine, and N,N-dimethylformamide are mixed in a mass ratio of 1: (3-4): (0.1-0.2): (20-30), reacted for 30-40 minutes under nitrogen protection, and filtered, washed, and dried to obtain the modified mica.

[0021] As an optimization, the preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric in step (7) is as follows: modified polyester, modified mica, and dibutyltin dilaurate are mixed in a mass ratio of 1: (0.03-0.05): (0.001-0.002), melt-blended in a twin-screw extruder, extruded into granules, melt-spun by a spinning machine to obtain modified polyester, and weaved and activated with sodium hypochlorite to obtain the medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature is 240-250°C, the winding speed is 700-800m / min, and the drafting ratio is 1.5-2.0 times; the activation process is: the active chlorine content of the sodium hypochlorite solution is 2500-4000mg / kg, the activation time is 15-30min, the drying temperature is 50-60°C, and the drying time is 15-25min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric is 150-180g / m 2 .

[0022] The present invention also provides a medical washable and high-temperature resistant modified polyester fiber fabric prepared according to the preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The medical washable and high-temperature resistant modified polyester fiber fabric prepared by the present invention is obtained by blending and spinning modified polyester and modified mica, and then activating them with sodium hypochlorite; the modified polyester is obtained by grafting n-dodecanethiol onto organosilicon-modified polyester, and then reacting with bromooctyl hydantoin; the modified mica is obtained by polymerizing diethyl phosphite and bisphenol S on the surface of pretreated mica, grafting a vinyl monomer, and then reducing it; the vinyl monomer is obtained by reacting 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone with an azo salt.

[0025] First, D4 and tetramethyltetravinylcyclotetrasiloxane are ring-opening polymerized to generate terminal hydroxyl silicone oil containing vinyl groups in the side chain; terminal hydroxyl silicone oil, dicarboxylic acid ester and diol are polycondensed to obtain silicone-modified polyester. The low glass transition temperature and molecular chain flexibility of the siloxane segment reduce the rigidity of the polyester fiber, making the fabric softer, and the high bond energy of the siloxane bond can enhance the thermal stability of the polyester fiber; the vinyl groups in the side chain and n-dodecyl mercaptan form thioether through a thiol-double bond click reaction, and the thioether reacts with bromooctyl hydantoin to generate a quaternary sulfonium salt, while introducing two long hydrophobic chains into the polyester. The hydrophobic long chains can further improve the hydrolysis resistance of the polyester; the quaternary The sulfonium salt cationic group effectively destroys the microbial cell membrane structure through electrostatic adsorption, giving the fabric long-lasting broad-spectrum antibacterial properties. Hydantoin, as a highly effective halamine precursor antibacterial agent, reacts with hypochlorite through a chlorination reaction between the active imine group in its molecule and the active imine group to generate a halamine compound with an N-Cl active structure. When the polyester fiber fabric comes into contact with microorganisms, the halamine group releases active chlorine free radicals to directly oxidize and destroy the bacterial cell membrane protein and nucleic acid structure, achieving rapid and broad-spectrum sterilization. At the same time, the chlorination reaction is highly reversible. Under conventional washing or ultraviolet irradiation, the N-Cl structure can be regenerated by chloride ions in water, giving the fabric long-lasting antibacterial properties.

[0026] Secondly, mica has a high thermal conductivity, is widely available, is inexpensive, and has excellent performance, and can be used to prepare fiber fabrics with a cool feel. The modified mica is a flame retardant system generated by an ester exchange reaction between diethyl phosphite and bisphenol S on the surface of pretreated mica, which gives the fabric good flame retardant properties. 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone reacts with an azo salt to obtain a vinyl monomer with good ultraviolet absorption properties. The azo salt and the active hydrogen on the pyridone undergo a coupling reaction and then cyclize to form a benzotriazole ring. The structure connected to the triazole enhances the absorption performance through intramolecular hydrogen bonding and conjugation, providing the fabric with good ultraviolet absorption properties. The double bond on the vinyl monomer and the phosphorus-hydrogen grafting on the diethyl phosphite introduce the functional group on the mica surface, and the nitro group on the functional group is reduced to an amino group by a reduction system.

[0027] The synthetic route of the vinyl monomer is as follows:

[0028]

[0029] The principle of ultraviolet absorption of vinyl monomers is shown as follows: Vinyl monomers exist in two tautomers: enol and keto.

[0030]

[0031] Finally, the modified polyester and modified mica are blended and spun, and then activated with sodium hypochlorite to obtain a fabric; the amino groups on the modified polyester and modified mica react with ester groups to generate amide bonds to form a cross-linked network, which can improve the mechanical properties of the fabric. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the following examples and comparative examples, D4 is octamethylcyclotetrasiloxane; and the mica particle size is 400 nm.

[0034] Example 1:

[0035] A method for preparing a medical washable and high-temperature resistant modified polyester fiber fabric, the method comprising the following steps:

[0036] (1) D4, tetramethyltetravinylcyclotetrasiloxane, and tetramethylammonium hydroxide were mixed in a mass ratio of 90:10:0.5, and saturated water vapor was introduced at a flow rate of 0.005 m 3 / h, heating to 180°C, stirring and reacting for 4h, and distilling under reduced pressure to obtain terminal hydroxyl silicone oil; mixing dimethyl terephthalate, ethylene glycol, and zinc acetate, heating to 190°C under nitrogen protection, reacting for 4h, distilling out methanol, adding terminal hydroxyl silicone oil and antimony trioxide, heating to 260°C under a vacuum degree of 100Pa, reacting for 3h, dissolving in acetone, filtering and concentrating under reduced pressure to obtain silicone modified polyester; the mass ratio of dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil is 100:35:1, the mass of zinc acetate is 0.2% of dimethyl terephthalate; the mass of antimony trioxide is 0.1% of dimethyl terephthalate;

[0037] (2) The organosilicon-modified polyester was dissolved in toluene at 70°C, and n-dodecyl mercaptan and photoinitiator 2,2-dimethoxy-2-phenylacetophenone were added. The mixture was stirred for 40 minutes and the wavelength was 365 nm and the power was 30 mW / cm 2 Under ultraviolet light irradiation, the reaction system was kept at a distance of 10 cm from the light source and stirred at 40°C for 3 hours. The ultraviolet light was turned off, and 0.1% antioxidant butylhydroxytoluene by mass of the silicone-modified polyester was added. Cold methanol at 5°C was used for precipitation, and the thioether polyester was obtained by filtration, washing with methanol, and drying. The mass ratio of the pre-modified polyester, n-dodecyl mercaptan, photoinitiator, toluene, and antioxidant was 10:2:0.1:300:0.001.

[0038] (3) 5,5-dimethylhydantoin was added to anhydrous potassium carbonate-acetone dispersion, and 1,8-bromooctane was added after refluxing for 50 minutes. After continuing to reflux for 24 hours, the mixture was subjected to reduced pressure distillation and ethyl acetate extraction. The organic phase was separated and collected, concentrated, and separated by silica gel chromatography. Ethyl acetate / petroleum ether was used as eluent to obtain bromooctylhydantoin. The mass ratio of 5,5-dimethylhydantoin, anhydrous potassium carbonate, acetone, and 1,8-bromooctane was 1:4:80:6, and the reflux temperature was 65°C. The thioether polyester was dissolved in N,N-dimethylformamide at 70°C, bromooctylhydantoin and silver tetrafluoroborate were added, and the mixture was reacted under nitrogen protection for 12 hours. The modified polyester was obtained by precipitation with cold methanol at 5°C, filtration, washing, and drying. The mass ratio of thioether polyester, N,N-dimethylformamide, bromooctylhydantoin, and silver tetrafluoroborate was 10:200:2:0.1.

[0039] (4) 2,4-dinitroaniline, pure water, and 4 mol / L hydrochloric acid were mixed in a mass ratio of 1:30:6, cooled to 5°C, and 0.15 g / mL sodium nitrite aqueous solution (5 times the mass of 2,4-dinitroaniline) was added, and stirring was continued for 50 min. The mixture was stored at 5°C in the dark to obtain an azo salt solution; 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone was dissolved in 0°C ice water to obtain a pyridone solution, and sodium carbonate was added to adjust the pH to 8; the azo salt solution was added dropwise to the pyridone solution at a drop rate of 0.6 mL / min, and the reaction was stirred for 3 h. The reaction system temperature was maintained at 10°C, and the pH was adjusted to 3 with concentrated hydrochloric acid. The mixture was placed in an ice bath for 2 h, filtered, washed with ice water, and washed with 5°C cold ethanol, and recrystallized from an ethanol-water solution (ethanol to pure water volume ratio of 1:3) to obtain a vinyl monomer; the mass ratio of pyridone solution, ice water, and azo salt solution was 1:20:0.5;

[0040] (5) Mix mica, vinyltrimethoxysilane, ethanol, and pure water in a mass ratio of 1:1.5:5:10, adjust the pH to 4 with hydrochloric acid, heat to 80°C and react for 8 hours, filter, wash, and dry to obtain vinyl mica; under nitrogen protection, mix vinyl mica, p-hydroxystyrene, N,N-dimethylformamide, and azobisisobutyronitrile in a mass ratio of 1:2:20:0.01, heat to 85°C and react for 6 hours, filter, wash, and dry to obtain pretreated mica; mix pretreated mica, N,N-dimethylformamide, diethyl phosphite, bisphenol S, and potassium carbonate in a mass ratio of 1:20:0.5:0.8:0.05, heat to 120°C and react for 6 hours under argon protection, filter, wash, and dry to obtain phosphate mica;

[0041] (6) Phosphate mica, vinyl monomer, cesium carbonate, and dimethyl sulfoxide were mixed in a mass ratio of 1:0.8:0.1:20, heated to 60°C under nitrogen protection for 7 hours, and filtered, washed, and dried to obtain pre-modified mica after the reaction was completed; pre-modified mica, tetrahydroxydiboron, 4,4'-bipyridine, and N,N-dimethylformamide were mixed in a mass ratio of 1:3:0.1:20, reacted under nitrogen protection for 40 minutes, and filtered, washed, and dried to obtain modified mica;

[0042] (7) Modified polyester, modified mica, and dibutyltin dilaurate were mixed in a mass ratio of 1:0.03:0.001, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun by a spinning machine to obtain modified polyester, which was then woven and activated with sodium hypochlorite to obtain a medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature was 250°C, the winding speed was 800m / min, and the draft ratio was 2.0 times; the activation process was: the active chlorine content of the sodium hypochlorite solution was 2500mg / kg, the activation time was 30min, the drying temperature was 60°C, and the drying time was 25min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric was 180g / m 2 .

[0043] Example 2:

[0044] A method for preparing a medical washable and high-temperature resistant modified polyester fiber fabric, the method comprising the following steps:

[0045] (1) D4, tetramethyltetravinylcyclotetrasiloxane, and tetramethylammonium hydroxide were mixed in a mass ratio of 93:7:0.7, and saturated water vapor was introduced at a flow rate of 0.005 m 3 / h, heating to 155°C, stirring for reaction for 3.5h, and distilling under reduced pressure to obtain terminal hydroxyl silicone oil; dimethyl terephthalate, ethylene glycol, and zinc acetate were mixed, heated to 185°C under nitrogen protection, reacted for 3.5h, methanol was distilled off, terminal hydroxyl silicone oil and antimony trioxide were added, and the mixture was heated to 250°C under a vacuum degree of 100Pa, reacted for 2.5h, dissolved in acetone, filtered, and concentrated under reduced pressure to obtain an organosilicon-modified polyester; the mass ratio of dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil was 100:40:1.5, the mass of zinc acetate was 0.2% of dimethyl terephthalate, and the mass of antimony trioxide was 0.1% of dimethyl terephthalate;

[0046] (2) The organosilicon-modified polyester was dissolved in toluene at 65°C, and n-dodecyl mercaptan and photoinitiator 2,2-dimethoxy-2-phenylacetophenone were added. The mixture was stirred for 35 minutes and the wavelength was 365 nm and the power was 24 mW / cm 2 Under ultraviolet light irradiation, the reaction system was 7 cm away from the light source and stirred at 30°C for 2 hours. The ultraviolet light was turned off, and 0.1% antioxidant butylhydroxytoluene by mass of the silicone-modified polyester was added. Cold methanol at 4°C was used for precipitation, and the thioether polyester was obtained by filtration, washing with methanol, and drying. The mass ratio of the pre-modified polyester, n-dodecyl mercaptan, photoinitiator, toluene, and antioxidant was 10:3:0.15:400:0.001.

[0047] (3) 5,5-dimethylhydantoin was added to anhydrous potassium carbonate-acetone dispersion, and 1,8-bromooctane was added after reflux for 40 minutes. After further reflux for 22 hours, the mixture was subjected to reduced pressure distillation and ethyl acetate extraction. The organic phase was separated and collected, concentrated, and separated by silica gel chromatography. Ethyl acetate / petroleum ether was used as eluent to obtain bromooctylhydantoin. The mass ratio of 5,5-dimethylhydantoin, anhydrous potassium carbonate, acetone, and 1,8-bromooctane was 1:4.5:85:6.5, and the reflux temperature was 60°C. The thioether polyester was dissolved in N,N-dimethylformamide at 65°C, bromooctylhydantoin and silver tetrafluoroborate were added, and the mixture was reacted under nitrogen for 11 hours. The modified polyester was obtained by precipitation with cold methanol at 3°C, filtration, washing, and drying. The mass ratio of thioether polyester, N,N-dimethylformamide, bromooctylhydantoin, and silver tetrafluoroborate was 10:250:2.5:0.15.

[0048] (4) 2,4-Dinitroaniline, pure water, and 4 mol / L hydrochloric acid were mixed in a mass ratio of 1:35:6.5, cooled to 4°C, and 0.15 g / mL sodium nitrite aqueous solution (5.5 times the mass of 2,4-Dinitroaniline) was added. Stirring was continued for 45 min, and the mixture was stored at 4°C in the dark to obtain an azo salt solution. 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone was dissolved in 3°C ice water to obtain a pyridone solution, and sodium carbonate was added. Adjust the pH to 8.5; add the azo salt solution dropwise to the pyridone solution at a rate of 0.5 mL / min, stir and react for 2.5 hours, maintain the temperature of the reaction system at 4°C, adjust the pH to 2.5 with concentrated hydrochloric acid, let stand in an ice bath for 1.5 hours, filter, wash with ice water, and wash with 4°C cold ethanol, and recrystallize from an ethanol-water solution (ethanol: pure water volume ratio of 1:3) to obtain a vinyl monomer; the mass ratio of pyridone solution, ice water, and azo salt solution is 1:25:0.55;

[0049] (5) Mix mica, vinyltrimethoxysilane, ethanol, and pure water in a mass ratio of 1:2:5.5:11, adjust the pH to 4 with hydrochloric acid, heat to 60°C and react for 7.5 hours, filter, wash, and dry to obtain vinyl mica; under nitrogen protection, mix vinyl mica, p-hydroxystyrene, N,N-dimethylformamide, and azobisisobutyronitrile in a mass ratio of 1:2.5:25:0.01, heat to 80°C and react for 5.5 hours, filter, wash, and dry to obtain pretreated mica; mix pretreated mica, N,N-dimethylformamide, diethyl phosphite, bisphenol S, and potassium carbonate in a mass ratio of 1:25:0.55:0.9:0.06, heat to 115°C and react for 5.5 hours under argon protection, filter, wash, and dry to obtain phosphate mica;

[0050] (6) Phosphate mica, vinyl monomer, cesium carbonate, and dimethyl sulfoxide were mixed in a mass ratio of 1:0.9:0.15:25, and the mixture was heated to 55°C for reaction for 6.5 hours under nitrogen protection. After the reaction, the mixture was filtered, washed, and dried to obtain pre-modified mica; pre-modified mica, tetrahydroxydiboron, 4,4'-bipyridine, and N,N-dimethylformamide were mixed in a mass ratio of 1:3.5:0.15:25, and the mixture was reacted for 35 minutes under nitrogen protection. The mixture was filtered, washed, and dried to obtain modified mica;

[0051] (7) Modified polyester, modified mica, and dibutyltin dilaurate were mixed in a mass ratio of 1:0.04:0.001, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun by a spinning machine to obtain modified polyester, which was then woven and activated with sodium hypochlorite to obtain medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature was 245°C, the winding speed was 850m / min, and the draft ratio was 1.7 times; the activation process was: the active chlorine content in the sodium hypochlorite solution was 3000mg / kg, the activation time was 20min, the drying temperature was 55°C, and the drying time was 20min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric was 160g / m 2 .

[0052] Example 3:

[0053] A method for preparing a medical washable and high-temperature resistant modified polyester fiber fabric, the method comprising the following steps:

[0054] (1) D4, tetramethyltetravinylcyclotetrasiloxane, and tetramethylammonium hydroxide were mixed in a mass ratio of 95:5:1.0, and saturated water vapor was introduced at a saturated water vapor flow rate of 0.005 m 3 / h, heating to 150°C, stirring and reacting for 3h, and distilling under reduced pressure to obtain terminal hydroxyl silicone oil; mixing dimethyl terephthalate, ethylene glycol, and zinc acetate, heating to 180°C under nitrogen protection, reacting for 3h, distilling out methanol, adding terminal hydroxyl silicone oil and antimony trioxide, heating to 240°C under a vacuum degree of 100Pa, reacting for 2h, dissolving in acetone, filtering and concentrating under reduced pressure to obtain silicone modified polyester; the mass ratio of dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil is 100:45:3, the mass of zinc acetate is 0.2% of dimethyl terephthalate; the mass of antimony trioxide is 0.1% of dimethyl terephthalate;

[0055] (2) The organosilicon-modified polyester was dissolved in toluene at 60°C, and n-dodecyl mercaptan and photoinitiator 2,2-dimethoxy-2-phenylacetophenone were added. The mixture was stirred for 30 minutes and the wavelength was 365 nm and the power was 15 mW / cm 2 Under ultraviolet light irradiation, the reaction system was 5 cm away from the light source and stirred at 25°C for 1 hour. The ultraviolet light was turned off, and 0.1% antioxidant butylhydroxytoluene by mass of the silicone-modified polyester was added. Cold methanol at 0°C was used for precipitation, and the thioether polyester was obtained by filtration, washing with methanol, and drying. The mass ratio of the pre-modified polyester, n-dodecyl mercaptan, photoinitiator, toluene, and antioxidant was 10:5:0.2:500:0.002.

[0056] (3) Add 5,5-dimethylhydantoin to anhydrous potassium carbonate-acetone dispersion, reflux for 30 minutes, then add 1,8-bromooctane, continue to reflux for 20 hours, perform vacuum distillation, extract with ethyl acetate, separate and collect the organic phase, concentrate and perform silica gel chromatography separation, use ethyl acetate / petroleum ether as eluent to obtain bromooctylhydantoin; the mass ratio of 5,5-dimethylhydantoin, anhydrous potassium carbonate, acetone and 1,8-bromooctane is 1:5:90:7, and the reflux temperature is 56°C; dissolve the thioether polyester in N,N-dimethylformamide at 60°C, add bromooctylhydantoin and silver tetrafluoroborate, react under nitrogen protection for 10 hours, precipitate with cold methanol at 0°C, filter, wash and dry to obtain the modified polyester; the mass ratio of thioether polyester, N,N-dimethylformamide, bromooctylhydantoin and silver tetrafluoroborate is 10:300:3:0.2;

[0057] (4) 2,4-dinitroaniline, pure water, and 4 mol / L hydrochloric acid were mixed in a mass ratio of 1:40:7, cooled to 0°C, and 0.15 g / mL sodium nitrite aqueous solution (6 times the mass of 2,4-dinitroaniline) was added, and stirring was continued for 40 min. The mixture was stored at 0°C in the dark to obtain an azo salt solution; 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone was dissolved in 0°C ice water to obtain a pyridone solution, and sodium carbonate was added to adjust the pH to 8; the azo salt solution was added dropwise to the pyridone solution at a drop rate of 0.4 mL / min, and the reaction was stirred for 2 h. The reaction system temperature was maintained at 5°C, and the pH was adjusted to 2 with concentrated hydrochloric acid. The mixture was placed in an ice bath for 1 h, filtered, washed with ice water, and washed with 0°C cold ethanol, and recrystallized from an ethanol-water solution (ethanol to pure water volume ratio of 1:3) to obtain a vinyl monomer; the mass ratio of pyridone solution, ice water, and azo salt solution was 1:30:0.6;

[0058] (5) Mix mica, vinyltrimethoxysilane, ethanol, and pure water in a mass ratio of 1:2.5:6:12, adjust the pH to 4 with hydrochloric acid, heat to 50°C and react for 7 hours, filter, wash, and dry to obtain vinyl mica; under nitrogen protection, mix vinyl mica, p-hydroxystyrene, N,N-dimethylformamide, and azobisisobutyronitrile in a mass ratio of 1:3:30:0.02, heat to 75°C and react for 5 hours, filter, wash, and dry to obtain pretreated mica; mix pretreated mica, N,N-dimethylformamide, diethyl phosphite, bisphenol S, and potassium carbonate in a mass ratio of 1:30:0.6:1.0:0.08, heat to 110°C and react for 5 hours under argon protection, filter, wash, and dry to obtain phosphate mica;

[0059] (6) Phosphate mica, vinyl monomer, cesium carbonate, and dimethyl sulfoxide were mixed in a mass ratio of 1:1.0:0.2:30, heated to 50°C under nitrogen protection for 6 hours, and filtered, washed, and dried to obtain pre-modified mica after the reaction was completed; pre-modified mica, tetrahydroxydiboron, 4,4'-bipyridine, and N,N-dimethylformamide were mixed in a mass ratio of 1:4:0.2:30, reacted under nitrogen protection for 30 minutes, and filtered, washed, and dried to obtain modified mica;

[0060] (7) Modified polyester, modified mica, and dibutyltin dilaurate were mixed in a mass ratio of 1:0.05:0.002, melt-blended in a twin-screw extruder, extruded into granules, and melt-spun by a spinning machine to obtain modified polyester, which was then woven and activated with sodium hypochlorite to obtain a medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature was 240°C, the winding speed was 700m / min, and the drafting ratio was 1.5 times; the activation process was: the active chlorine content of the sodium hypochlorite solution was 4000mg / kg, the activation time was 15min, the drying temperature was 50°C, and the drying time was 15min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric was 150g / m 2 .

[0061] Comparative Example 1:

[0062] The preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric of Comparative Example 1 is different from that of Example 2 in that the organosilicon-modified polyester is not modified, specifically, steps (2) to (3) are not included, and step (7) is modified as follows: the organosilicon-modified polyester and the modified mica are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, melt-spun by a spinning machine to obtain modified polyester, and woven and activated with sodium hypochlorite to obtain a medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature is 245°C, the winding speed is 850m / min, and the draft ratio is 1.7 times; the activation process is: the active chlorine content in the sodium hypochlorite solution is 3000mg / kg, the activation time is 20min, the drying temperature is 55°C, and the drying time is 20min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric is 160g / m 2 The remaining steps are the same as in Example 2.

[0063] Comparative Example 2:

[0064] The preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric of Comparative Example 2 is different from that of Example 2 in that the mica is not modified, specifically, steps (4) to (6) are not included, and step (7) is modified as follows: the modified polyester and mica are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, melt-spun by a spinning machine to obtain modified polyester, and woven and activated with sodium hypochlorite to obtain a medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature is 245°C, the winding speed is 850m / min, and the draft ratio is 1.7 times; the activation process is: the active chlorine content in the sodium hypochlorite solution is 3000mg / kg, the activation time is 20min, the drying temperature is 55°C, and the drying time is 20min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric is 160g / m 2 The remaining steps are the same as in Example 2.

[0065] Comparative Example 3:

[0066] The preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric of Comparative Example 3 is different from that of Example 2 in that the phosphate mica is not modified, specifically, step (6) is not included; step (7) is modified as follows: the modified polyester and the phosphate mica are mixed in a mass ratio of 1:0.04, melt-blended in a twin-screw extruder, extruded into granules, melt-spun by a spinning machine to obtain modified polyester, and woven and activated with sodium hypochlorite to obtain a medical washable and high-temperature resistant modified polyester fiber fabric; the spinning temperature is 245°C, the winding speed is 850m / min, and the draft ratio is 1.7 times; the activation process is: the active chlorine content in the sodium hypochlorite solution is 3000mg / kg, the activation time is 20min, the drying temperature is 55°C, and the drying time is 20min; the weight of the medical washable and high-temperature resistant modified polyester fiber fabric is 160g / m 2 The remaining steps are the same as in Example 2.

[0067] Test Example 1:

[0068] Flame retardant performance test:

[0069] Test method: The limiting oxygen index of the examples and comparative examples was tested according to GB / T5454. The results are shown in Table 1.

[0070] Table 1

[0071] Limiting oxygen index (%) Limiting oxygen index (%) Example 1 32.4 Comparative Example 1 30.14 Example 2 32.9 Comparative Example 2 27.36 Example 3 33.1 Comparative Example 3 31.02

[0072] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 1, it can be found that the fabric prepared by the present invention has good flame retardant properties.

[0073] The flame retardant properties of Examples 1 to 3 are better than those of Comparative Example 2, indicating that the modified mica is a flame retardant system generated by ester exchange reaction of diethyl phosphite and bisphenol S on the surface of pretreated mica, which gives the fabric good flame retardant properties.

[0074] Test Example 2:

[0075] Antibacterial performance test:

[0076] The antibacterial properties of the fabrics prepared in the examples and comparative examples were tested according to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles Part 3: Oscillation Method" using Escherichia coli as the test bacteria. The results are shown in Table 1.

[0077] Washing resistance test: The examples and comparative examples were washed according to the 3A washing method in AATCC 61-2006, with a washing temperature of 70° C. and a washing frequency of 30 times. The antibacterial properties were tested according to the antibacterial performance test method. The results are shown in Table 2.

[0078] Table 2

[0079]

[0080]

[0081] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 2, it can be found that the fabric prepared by the present invention has good antibacterial properties and water-resistant properties.

[0082] The antibacterial properties of Examples 1 to 3 are better than those of Comparative Example 1, indicating that first, D4 and tetramethyltetravinylcyclotetrasiloxane are ring-opening polymerized to generate a hydroxy-terminated silicone oil containing a vinyl group in the side chain; the hydroxy-terminated silicone oil, dicarboxylic acid ester, and diol are polycondensed to obtain a silicone-modified polyester; the vinyl group in the side chain and n-dodecanethiol form a thioether through a thiol-double bond click reaction; the thioether reacts with bromooctyl hydantoin to form a quaternary sulfonium salt; the quaternary sulfonium salt cationic group effectively destroys the microbial cell membrane structure through electrostatic adsorption, giving the fabric long-lasting broad-spectrum antibacterial properties; hydantoin, as a highly efficient halamine precursor antibacterial agent, reacts with hypochlorite through a chlorination reaction of the active imine group in its molecule to generate a halamine compound with an N-Cl active structure. When the polyester fiber fabric contacts microorganisms, the halamine group directly oxidizes and destroys the bacterial cell membrane protein and nucleic acid structure by releasing active chlorine free radicals, achieving rapid and broad-spectrum sterilization. At the same time, the chlorination reaction is highly reversible. Under conventional washing or ultraviolet irradiation, the N-Cl structure can be regenerated by chloride ions in water, giving the fabric long-lasting antibacterial properties;

[0083] Test Example 3:

[0084] Test of anti-ultraviolet aging performance:

[0085] Test method: Fabrics were aged according to GB / T 16422.3-2022. UVA-340 was used to age the fabrics at 80°C for 7 days. After aging, the breaking strength was tested and the breaking strength retention was calculated. The breaking strength was tested according to ASTM D5035-11 (2024). The results are shown in Table 3.

[0086] Table 3

[0087] Breaking strength retention rate (%) Breaking strength retention rate (%) Example 1 95.67 Comparative Example 1 90.36 Example 2 96.04 Comparative Example 2 84.15 Example 3 96.31 Comparative Example 3 73.81

[0088] From the comparison of the experimental data of Examples 1 to 3 and Comparative Examples 1 to 3 in Table 3, it can be found that the fabric prepared by the present invention has good anti-aging performance.

[0089] The anti-aging performance of Examples 1 to 3 is better than that of Comparative Examples 2 to 3, indicating that the vinyl monomer obtained by the reaction of 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and azo salt has good ultraviolet absorption performance, and the active hydrogen on the azo salt and pyridone undergoes a coupling reaction and then cyclization to form a benzotriazole ring. The structure connected to the triazole enhances the absorption performance through intramolecular hydrogen bonding and conjugation, thereby providing good ultraviolet absorption performance for the fabric.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a medical washable and high temperature resistant modified polyester fiber fabric, characterized in that: The method comprises the following preparation steps: (1) reacting D4 and tetramethyltetravinylcyclotetrasiloxane to obtain terminal hydroxyl silicone oil; reacting dimethyl terephthalate, ethylene glycol, and terminal hydroxyl silicone oil to obtain organosilicon-modified polyester; (2) reacting organosilicon-modified polyester and n-dodecyl mercaptan to obtain thioether polyester; (3) reacting thioether polyester and bromooctyl hydantoin to obtain modified polyester; (4) reacting 2,4-dinitroaniline, hydrochloric acid, and sodium nitrite to obtain an azo salt; reacting 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone and an azo salt to obtain a vinyl monomer; (5) reacting mica with vinyltrimethoxysilane to obtain vinyl mica; reacting vinyl mica with p-hydroxystyrene to obtain pretreated mica; reacting pretreated mica with diethyl phosphite and bisphenol S to obtain phosphate mica; (6) reacting phosphate mica and vinyl monomer to obtain pre-modified mica; reducing the pre-modified mica to obtain the modified mica; (7) The modified polyester and modified mica are melt-blended and spun to obtain modified polyester, which is then woven and activated with sodium hypochlorite to obtain medical washable and high-temperature resistant modified polyester fiber fabric.

2. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the organosilicon-modified polyester in step (1) is as follows: D4, tetramethyltetravinylcyclotetrasiloxane and tetramethylammonium hydroxide are mixed in a mass ratio of (90-95): (5-10): (0.5-1.0), saturated water vapor is introduced, the temperature is raised to 150-180° C., and the reaction is stirred for 3-4 hours to obtain terminal hydroxyl silicone oil; dimethyl terephthalate, ethylene glycol and zinc acetate are heated to 180-190° C. under nitrogen protection, and the reaction is carried out for 3 hours. -4h, end-hydroxy silicone oil and antimony trioxide are added, the temperature is raised to 240-260°C under vacuum, and the reaction is carried out for 2-3h to obtain a silicone-modified polyester; the mass ratio of dimethyl terephthalate, ethylene glycol, and end-hydroxy silicone oil is 100:(35-45):(1-3), the mass of zinc acetate is 0.2% of dimethyl terephthalate; the mass of antimony trioxide is 0.1% of dimethyl terephthalate; and the D4 is octamethylcyclotetrasiloxane.

3. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the thioether polyester in step (2) is as follows: mixing the organosilicon-modified polyester, toluene, n-dodecyl mercaptan and a photoinitiator, stirring and reacting at 25-40° C. for 1-3 hours under ultraviolet light, adding an antioxidant to obtain the thioether polyester; the mass ratio of the pre-modified polyester, n-dodecyl mercaptan, photoinitiator, toluene and antioxidant is 10:(2-5):(0.1-0.2):(300-500):(0.001-0.002).

4. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the modified polyester in step (3) is as follows: 5,5-dimethylhydantoin is added to an anhydrous potassium carbonate-acetone dispersion, refluxed for 30-50 minutes, and then 1,8-bromooctane is added, and refluxed for 20-24 hours to obtain bromooctylhydantoin; the mass ratio of 5,5-dimethylhydantoin, anhydrous potassium carbonate, acetone, and 1,8-bromooctane is 1:(4-5):(80-90):(6-7); thioether polyester, N,N-dimethylformamide, bromooctylhydantoin, and silver tetrafluoroborate are reacted for 10-12 hours to obtain the modified polyester; the mass ratio of thioether polyester, N,N-dimethylformamide, bromooctylhydantoin, and silver tetrafluoroborate is 10:(200-300):(2-3):(0.1-0.2).

5. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the vinyl monomer in step (4) is as follows: 2,4-dinitroaniline, pure water, and 4 mol / L hydrochloric acid are mixed in a mass ratio of 1:(30-40):(6-7), cooled to 0-5°C, 0.15 g / mL sodium nitrite aqueous solution 5-6 times the mass of 2,4-dinitroaniline is added, and stirring is continued for 40-50 minutes to obtain an azo salt solution; 1-allyl-3-cyano-6-hydroxy-4-methyl-2-pyridone is dissolved in 0-5°C ice water to obtain a pyridone solution, and the pH is adjusted to 8-9; the azo salt solution and the pyridone solution are reacted to obtain the vinyl monomer; the mass ratio of the pyridone solution, ice water, and the azo salt solution is 1:(20-30):(0.5-0.6).

6. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the phosphate mica in step (5) is as follows: mica, vinyl trimethoxysilane, ethanol, and pure water are mixed in a mass ratio of 1: (1.5-2.5): (5-6): (10-12), the pH is adjusted to 4, the temperature is raised to 50-80 ° C, and the reaction is carried out for 7-8 hours to obtain vinyl mica; vinyl mica, p-hydroxystyrene, N, N-dimethylformamide, and azobisisobutyronitrile are mixed in a mass ratio of 1: (1.5-2.5): (5-6): (10-12) under nitrogen protection. 1:(2-3):(20-30):(0.01-0.02), heat to 75-85°C and react for 5-6h to obtain pretreated mica; pretreated mica, N,N-dimethylformamide, diethyl phosphite, bisphenol S, and potassium carbonate are mixed in a mass ratio of 1:(20-30):(0.5-0.6):(0.8-1.0):(0.05-0.08), heat to 110-120°C and react for 5-6h to obtain phosphate mica.

7. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the modified mica in step (6) is as follows: phosphate mica, vinyl monomer, cesium carbonate, and dimethyl sulfoxide are mixed in a mass ratio of 1: (0.8-1.0): (0.1-0.2): (20-30), and the mixture is heated to 50-60° C. and reacted for 6-7 hours to obtain pre-modified mica; pre-modified mica, tetrahydroxydiboron, 4,4'-bipyridine, and N,N-dimethylformamide are mixed in a mass ratio of 1: (3-4): (0.1-0.2): (20-30), and the mixture is reacted for 30-40 minutes to obtain modified mica.

8. The method for preparing a medical washable and high temperature resistant modified polyester fiber fabric according to claim 1, characterized in that: The preparation method of the medical washable and high-temperature resistant modified polyester fiber fabric described in step (7) is as follows: modified polyester, modified mica, and dibutyltin dilaurate are mixed in a mass ratio of 1: (0.03-0.05): (0.001-0.002), melt-blended in a twin-screw extruder, extruded into granules, melt-spun through a spinning machine to obtain modified polyester, and weaved and activated with sodium hypochlorite to obtain the medical washable and high-temperature resistant modified polyester fiber fabric.

9. A medical washable and high-temperature resistant modified polyester fiber fabric prepared according to the preparation method of medical washable and high-temperature resistant modified polyester fiber fabric according to any one of claims 1 to 8.

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