A method for preparing a textile fiber fabric resistant to ultraviolet yellowing.

Abstract

This invention discloses a method for preparing a textile fiber fabric resistant to ultraviolet (UV) yellowing, relating to the field of textile technology. The textile fiber fabric, by weight, comprises the following raw materials: 60-80 parts polyester fiber chips, 2-5 parts nano-titanium dioxide, 0.8-1.5 parts silane coupling agent, 2-5 parts UV-resistant modifier, 0.5-1.5 parts antioxidant, 0.3-0.8 parts dispersant, 0.8-1.2 parts spinning oil, and 15-20 parts deionized water. This invention modifies nano-titanium dioxide using a specific silane coupling agent and combines it with an optimized preparation process, ensuring uniform dispersion of nanoparticles within the polyester fibers and effectively preventing nanoparticle aggregation. Simultaneously, the synergistic effect of the UV-resistant modifier and antioxidant constructs a dual UV-resistant system, significantly inhibiting the photo-oxidative degradation reaction of polyester fibers under UV irradiation, thereby effectively reducing fiber yellowing and improving the fabric's UV resistance.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a method for preparing a textile fiber fabric resistant to ultraviolet yellowing. Background Technology

[0002] With the widespread application of textile materials in outdoor clothing, sunshade products, automotive interiors, and home decoration, the weather resistance of textile fabrics under long-term sunlight exposure, especially their resistance to ultraviolet aging and yellowing, is receiving increasing attention. Polyester fibers are widely used in various textile fabrics due to their excellent mechanical properties, good abrasion resistance, high dimensional stability, and low cost. However, under long-term ultraviolet light exposure, the molecular chains of polyester fibers are prone to photo-oxidative degradation reactions, producing oxidation products such as carbonyl groups and peroxides. This leads to problems such as yellowing, decreased strength, and shortened service life of the fabric, seriously affecting its appearance and performance.

[0003] To improve the UV resistance of polyester fabrics, current technologies typically employ finishing processes or add functional auxiliaries such as UV absorbers and antioxidants during the spinning stage. For example, UV absorbers can be introduced through fabric padding, coating, or finishing solutions. While these processes are simple, the auxiliaries tend to concentrate on the fabric surface, making them prone to migration and loss during repeated washing, friction, or long-term use, resulting in poor durability. Furthermore, some finishing agents may affect the fabric's hand feel, breathability, and comfort. In addition, some technologies attempt to directly add UV absorbers or inorganic fillers during the melt spinning process of polyester fibers to improve UV resistance. However, conventional UV absorbers are prone to thermal decomposition or failure under high-temperature melt processing conditions, and their compatibility with the polyester matrix is ​​limited, easily leading to uneven dispersion and localized aggregation, thus affecting spinning stability and fiber mechanical properties. While inorganic nanofillers such as titanium dioxide possess excellent UV shielding capabilities, their high surface energy and tendency to agglomerate result in poor dispersibility within polyester systems. Without effective surface modification and dispersion methods, this can easily lead to increased fiber breakage rates and a stiffer fabric feel. Therefore, current technologies generally suffer from limitations such as unstable UV yellowing resistance, insufficient additive durability, decreased overall fiber performance, and complex or poorly controllable preparation processes. Consequently, they struggle to simultaneously meet the comprehensive requirements for UV aging resistance, anti-yellowing properties, fiber spinnability, and fabric performance.

[0004] Based on the above problems, there is an urgent need to provide a method for preparing textile fiber fabrics that is reasonable in process, has uniform dispersion of additives, excellent resistance to ultraviolet yellowing, and is suitable for industrial production, so as to effectively improve the long-term stability and application value of polyester fiber fabrics in ultraviolet environment. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a method for preparing a UV-resistant textile fiber fabric that features a reasonable process, uniform dispersion of additives, excellent resistance to UV yellowing, and balances fiber spinnability and fabric performance, making it suitable for industrial production. This method effectively solves the problems of unstable UV resistance, insufficient durability of functional additives, and easy decline in the overall performance of fibers in existing technologies, thereby improving the long-term stability and application value of polyester fiber fabrics under UV conditions.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A method for preparing a textile fiber fabric resistant to ultraviolet yellowing includes the following steps:

[0008] S1. Raw material pretreatment: The polyester fiber chips are dried at 120-140℃ for 4-6 hours to remove moisture; nano titanium dioxide, dispersant, and silane coupling agent are added to deionized water and dispersed under ultrasonic conditions to form a uniform modified nano dispersion; the modified nano dispersion is spray-dried to obtain modified nano titanium dioxide powder, which is then pulverized and passed through a 200-mesh sieve for later use.

[0009] S2. Melting and blending: The dried polyester fiber chips, modified nano titanium dioxide powder, UV-resistant modifier, and antioxidant are added to a high-speed mixer and stirred and mixed at 100-120℃ for 20-30 minutes. Then, the mixture is fed into a twin-screw extruder and melt-blended at 260-280℃ to obtain composite masterbatch.

[0010] S3. Melt spinning: The composite masterbatch is added to the hopper of the spinning machine, melted by screw extrusion, and then extruded by the spinneret to form nascent fibers. The extrusion temperature is controlled at 270-290℃, and the spinneret pressure is 5-8MPa. The nascent fibers are cooled by blowing air at a temperature of 20-25℃ and a speed of 0.5-1.2m / s. The cooled fibers are then evenly coated with spinning oil by an oiling device. The oiled fibers are then introduced into a drawing and texturing machine. The first draw ratio is controlled at 2.5-3.5 times, and the second draw ratio is controlled at 1.2-1.5 times. During the drawing process, the heating temperature is controlled at 80-90℃ in zone one, 120-130℃ in zone two, and the setting temperature is 130-140℃. The modified fibers are then wound to obtain the modified fibers.

[0011] S4. Weaving: The modified fibers are twisted and plyed to a twist rate of 80-150 twists / meter to form ply yarns. These ply yarns are used as warp and weft yarns respectively. The warp yarns are warped by a warping machine at a speed of 200-300 m / min and a warping tension of 5-15 cN. The weft yarns are wound by a winding machine at a speed of 400-600 m / min and a winding tension of 3-8 cN. An air-jet loom is used to weave the fabric, with a warp density of 100-300 ends / 10cm and a weft density of 80-180 ends / 10cm, at a weaving speed of 300-400 r / min, to obtain a textile fiber fabric resistant to UV yellowing.

[0012] The structure of the silane coupling agent is shown in Formula 1;

[0013] Formula 1: .

[0014] Furthermore, the fiber fabric is composed of the following raw materials by weight: 60-80 parts polyester fiber chips, 2-5 parts nano titanium dioxide, 0.8-1.5 parts silane coupling agent, 2-5 parts UV resistant modifier, 0.5-1.5 parts antioxidant, 0.3-0.8 parts dispersant, 0.8-1.2 parts spinning oil agent, and 15-20 parts deionized water.

[0015] Furthermore, in step S1, the ultrasonic power is 300-800W and the ultrasonic time is 15-30min.

[0016] Furthermore, in step S2, the screw speed of the twin-screw extruder is 200-300 r / min, and the temperature distribution of each section is as follows: feeding section 200-220℃, compression section 240-260℃, homogenization section 260-280℃, and die head 270-280℃.

[0017] Furthermore, the polyester fiber chips are polyethylene terephthalate chips with an intrinsic viscosity of 0.60-0.75 dL / g.

[0018] Furthermore, the average particle size of the nano-titanium dioxide is 10-100 nm.

[0019] Furthermore, the UV-resistant modifier is composed of UV absorber UV-P and HALS 622 in a mass ratio of 1:1.

[0020] Furthermore, the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1.

[0021] Furthermore, the dispersant is one or more of naphthalene sulfonate condensate or lignin sulfonate.

[0022] Furthermore, the spinning oil is a composite spinning oil containing antistatic and lubricating components, and its kinematic viscosity is 30-70 mm. 2 / s.

[0023] This invention, through precise compounding and synergistic effects of various raw material components combined with an optimized preparation process, fundamentally solves the technical problems of unstable UV resistance, insufficient durability of functional additives, and easy decline in overall fiber performance in existing polyester fiber fabrics. Using polyethylene terephthalate chips as the substrate ensures the basic mechanical properties of the fiber; nano-titanium dioxide is modified with a silane coupling agent and ultrasonically dispersed to form a uniform dispersion. The silane coupling agent effectively reduces the surface energy of the nanoparticles and improves their compatibility with the polyester matrix. Combined with dispersants such as polyoxyethylene ethers, it prevents nanoparticle aggregation and achieves physical shielding against UV light; the UV-resistant modifier is a compound of UV absorber UV-P and light stabilizer HALS 622. UV-P selectively absorbs UV light and converts it into heat energy, while HALS... 622 can capture free radicals generated by photo-oxidation and inhibit degradation chain reactions. The two work together to construct a dual anti-UV system of absorption and capture, making up for the limitations of single auxiliary agents in anti-aging. Antioxidants 1010 and 168 are compounded. The main antioxidant captures free radicals and the auxiliary antioxidant decomposes peroxides. Together with the UV-resistant modifier, they inhibit the photo-oxidative degradation of polyester molecular chains, reduce the generation of carbonyl groups and peroxides, and avoid fabric yellowing and strength reduction. The spinning oil contains antistatic and lubricating components, which improves fiber spinnability, reduces spinning breakage rate, and does not affect the breathability and hand feel of the fabric. All auxiliaries are fully integrated with the polyester matrix during the mixing and melting stage, forming a uniformly structured fabric through melt spinning and weaving. The auxiliaries are evenly embedded inside the fibers rather than just adhering to the surface, solving the problem of easy migration and loss of auxiliaries in the finishing process and improving durability. At the same time, the precise matching of the dosage of each component ensures both the anti-UV yellowing effect and avoids excessive auxiliaries from affecting the spinnability of the fibers and the wearability of the fabric. Ultimately, it achieves synergistic optimization of UV yellowing resistance, mechanical properties and wearability, meeting the long-term stability requirements of outdoor use and other scenarios.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. Significantly Improved UV Resistance to Yellowing: This invention modifies nano-titanium dioxide using a specific silane coupling agent and combines it with an optimized preparation process, ensuring uniform dispersion of nanoparticles within polyester fibers and effectively preventing nanoparticle aggregation. Simultaneously, the synergistic effect of the UV-resistant modifier and antioxidant constructs a dual UV-resistant system, which significantly inhibits the photo-oxidative degradation reaction of polyester fibers under UV irradiation, thereby effectively reducing fiber yellowing and improving the fabric's UV resistance to yellowing.

[0026] 2. Optimized Fiber Mechanical Property Stability: During the preparation process, this invention precisely blends the raw material components and optimizes the mixing, melting, melt spinning, and weaving process parameters to ensure the complete integration of auxiliaries with the polyester matrix. This optimized process not only improves the spinnability of the fiber and reduces the breakage rate during spinning, but also guarantees the stability of the fiber's mechanical properties. During long-term use, the fiber's breaking strength and elongation at break maintain a relatively stable and excellent trend, meeting the long-term stability requirements of fabric mechanical properties for outdoor applications and other scenarios.

[0027] 3. Enhanced Auxiliary Agent Durability and Fabric Wearability: Compared to traditional finishing processes, this invention embeds auxiliary agents uniformly into the fibers, rather than merely adhering to the fabric surface. This effectively solves the problem of auxiliary agents migrating and being lost during repeated washing, friction, or long-term use, significantly improving their durability. Furthermore, the auxiliary agents and optimized process parameters used in this invention improve UV resistance while avoiding negative impacts on fabric feel, breathability, and comfort, achieving synergistic optimization of UV resistance and fabric wearability. Attached Figure Description

[0028] Figure 1 This is the infrared spectrum of the silane coupling agent described in this invention. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Preparation Example

[0031] Preparation of silane coupling agents:

[0032] first step: ;

[0033] Under nitrogen protection, 60 mL of toluene was added to a dry flask. Then, 5.00 g of starter 1, 3.66 g of starter 2, 0.28 g of tris(dibenzylacetone)palladium, 0.29 g of XPOS, and 3.85 g of potassium carbonate were added sequentially. The reaction mixture was degassed by bubbling with nitrogen for 15 minutes, then heated to 100 °C and stirred at this temperature for 16 hours. After the reaction was complete, the mixture was cooled to room temperature and quenched with a saturated ammonium chloride aqueous solution. The aqueous phase was extracted with ethyl acetate, the organic phases were combined, washed with a saturated sodium chloride aqueous solution, dried over anhydrous sodium sulfate, filtered, and the solvent was concentrated under reduced pressure to obtain the crude product. The crude product was purified by silica gel column chromatography (eluent: petroleum ether / ethyl acetate mixture). The solvent was concentrated under reduced pressure to give 5.68 g of intermediate 1. The mass spectrometry (MS) of intermediate 1 was 458.

[0034] Step Two: ;

[0035] Under nitrogen protection, 5.68 g of intermediate 1 and 70 mL of anhydrous toluene were added sequentially to a flask. The mixture was heated to 60 °C to completely dissolve the solid. 0.08 g of tetrabutyl titanate was added, followed by the slow dropwise addition of 2.75 g of starting material 3. The reaction mixture was degassed by bubbling with nitrogen for 15 minutes, then heated to 110 °C and stirred at this temperature for 8 hours. After the reaction was complete, heating was stopped, and the mixture was cooled to room temperature under nitrogen protection. The reaction solution was transferred to a single-necked flask, and the solvent and unreacted starting material were removed by rotary evaporation under reduced pressure to obtain a crude product. Anhydrous n-heptane was added to the crude product, and the mixture was heated to reflux to dissolve. Crystals precipitated upon cooling. The crystals were rapidly filtered under nitrogen protection, washed with a small amount of cold anhydrous n-heptane, and dried under vacuum to obtain 6.71 g of silane coupling agent. The MS (M+1) mass spectrometry of the silane coupling agent was 647.

[0036] Example 1

[0037] Preparation of a textile fiber fabric resistant to ultraviolet yellowing:

[0038] 1. Raw material components:

[0039] Polyester fiber chips: 70 parts, which are polyethylene terephthalate chips with an intrinsic viscosity of 0.64 dL / g;

[0040] Nano titanium dioxide: 3.5 parts, average particle size 50nm;

[0041] Silane coupling agent: 1.2 parts, which is the silane coupling agent prepared in the preparation example;

[0042] UV-resistant modifier: 4 parts, which is composed of UV absorber UV-P and HALS 622 in a mass ratio of 1:1;

[0043] Antioxidant: 1.2 parts, which is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:1;

[0044] Dispersant: 0.6 parts; sodium dinaphthylmethane disulfonate;

[0045] Spinning oil: 1 part, polyester FDY oil, kinematic viscosity 30-60 mm. 2 / s (30℃);

[0046] Deionized water: 17 parts;

[0047] 2. Preparation method:

[0048] S1. Raw material pretreatment: 70 parts of polyethylene terephthalate (PET) chips were placed in a drying device and dried at 130℃ for 5 hours to fully remove moisture from the chips; 3.5 parts of nano titanium dioxide, 0.6 parts of dispersant, and 1.2 parts of silane coupling agent were added to 17 parts of deionized water. The mixture was placed in an ultrasonic dispersion device, and the ultrasonic power was set to 500W and the ultrasonic time to 20min for efficient dispersion treatment to form a uniform modified nano dispersion. The modified nano dispersion was spray-dried to obtain modified nano titanium dioxide powder, which was then pulverized and passed through a 200-mesh sieve for later use.

[0049] S2. Melting and Mixing: The dried polyester fiber chips, 3.5 parts of modified nano titanium dioxide powder, 4 parts of UV-resistant modifier, and 1.2 parts of antioxidant are sequentially added to a high-speed mixer. The mixing temperature is set to 110℃ and the stirring time is set to 25min. The equipment is started to thoroughly mix and ensure that the components are initially uniformly mixed. The mixture is then fed into a twin-screw extruder. The screw speed is set to 250r / min. The temperature distribution of each section of the extruder is as follows: feeding section 210℃, compression section 250℃, homogenization section 270℃, and die head 275℃. Melting and blending are carried out at 270℃. After extrusion and pelletizing, composite masterbatch is obtained.

[0050] S3. Melt spinning: The above-mentioned composite masterbatch is added to the hopper of the spinning machine, and after being melted by the screw extrusion, it is extruded by the spinneret to form nascent fibers. The extrusion temperature is controlled at 280℃ and the spinneret pressure is set at 6MPa. The extruded nascent fibers are sent to the air cooling device, and the air temperature is set at 22℃ and the air speed is 0.8m / s. After cooling, the fibers are evenly coated with spinning oil by the oiling device. The oiled fibers are introduced into the drawing and texturing machine, and the first drawing ratio is controlled at 3 times and the second drawing ratio is controlled at 1.3 times. During the drawing process, the heating temperature is controlled at 85℃ in zone 1 and 125℃ in zone 2, and the setting temperature is 135℃. The modified fibers are then wound.

[0051] S4. Weaving: The modified fibers are twisted and plyed to a twist rate of 110 twists / meter to form ply yarns. These ply yarns are used as warp and weft yarns respectively. The warp yarns are warped by a warping machine at a speed of 250 m / min and a warping tension of 10 cN. The weft yarns are wound by a winding machine at a speed of 500 m / min and a winding tension of 5 cN. An air-jet loom is used with a warp density of 200 ends / 10 cm and a weft density of 120 ends / 10 cm, and a weaving speed of 350 r / min to obtain a textile fiber fabric resistant to UV yellowing.

[0052] Example 2

[0053] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out by referring to the preparation method of Example 1, except that the mass part of polyester fiber chips is replaced with 60 parts, and other operations are kept the same as in Example 1.

[0054] Example 3

[0055] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out by referring to the preparation method of Example 1, except that the mass part of nano titanium dioxide is replaced with 5 parts, and other operations are kept the same as in Example 1.

[0056] Example 4

[0057] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out by referring to the preparation method of Example 1, except that the mass part of the dispersant is replaced with 0.3 parts, and other operations are the same as in Example 1.

[0058] Comparative Example 1

[0059] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out by referring to the preparation method of Example 1, except that the silane coupling agent is replaced with comparative compound 1, and other operations are the same as in Example 1.

[0060] Comparative compound 1: .

[0061] Comparative Example 2

[0062] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out by referring to the preparation method of Example 1, except that the silane coupling agent is replaced with KH-550, and other operations are the same as in Example 1.

[0063] Comparative Example 3

[0064] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out according to the preparation method of Example 1, without the addition of the silane coupling agent, and the other operations are the same as in Example 1.

[0065] Comparative Example 4

[0066] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out according to the preparation method of Example 1, without adding the ultraviolet-resistant modifier, and the other operations are the same as in Example 1.

[0067] Comparative Example 5

[0068] The preparation of a textile fiber fabric resistant to ultraviolet yellowing is carried out according to the preparation method of Example 1, without the addition of antioxidants, and the other operations are the same as in Example 1.

[0069] Performance testing

[0070] 1. Mechanical property testing: Referring to GB / T 3923.1-2013 standard, the breaking strength and breaking elongation of the fabrics in the example and comparative examples were tested, and the results are shown in the table below.

[0071] 2. UV resistance to yellowing test: Referring to GB / T 8427-2019 and GB / T 250-2008 standards, a xenon arc lamp was used to simulate UV irradiation in the natural environment. Test conditions were set as follows: Irradiation intensity: 1.10 W / (m²). 2 The irradiation time was 400 h, with a blackboard temperature of (63±3)℃, relative humidity of (50±2)%, and a total irradiation time of 340 nm. During this period, the samples were protected from rain and contamination. The resistance to UV yellowing was evaluated by comparing the color changes of the fabrics in the examples and comparative examples before and after irradiation, and the color change level was assessed using a gray scale. After UV yellowing, the tensile strength was tested using the same method, and the strength retention rate was calculated. The results are shown in the table below.

[0072] Table 1. Performance test results of the examples and comparative examples

[0073]

[0074] Table 1 shows that the examples using the silane coupling agent prepared according to the present invention exhibit a more stable and superior overall mechanical property trend, with better breakage-related characteristics. In contrast, the comparative examples using other types of coupling agents or without silane coupling agents all showed varying degrees of decline in mechanical properties. Regarding UV yellowing resistance, the fabrics using the silane coupling agent of the present invention showed a more gradual color change trend and a better tendency to retain breaking strength after UV irradiation. In contrast, the comparative examples without this coupling agent or using other coupling agents showed more pronounced yellowing and a more significant trend of strength loss. This fully demonstrates that the silane coupling agent of the present invention can effectively improve the compatibility between nanofillers and the polyester matrix, prevent nanoparticle aggregation, and work synergistically with UV-resistant modifiers, antioxidants, and other components. It not only ensures good mechanical property stability of the fabric but also significantly enhances its UV yellowing resistance, making it a key factor in improving the overall performance of the fabric.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a textile fiber fabric resistant to ultraviolet yellowing, characterized in that, Includes the following steps: S1. Raw material pretreatment: The polyester fiber chips are dried at 120-140℃ for 4-6 hours to remove moisture; nano titanium dioxide, dispersant, and silane coupling agent are added to deionized water and dispersed under ultrasonic conditions to form a uniform modified nano dispersion; the modified nano dispersion is spray-dried to obtain modified nano titanium dioxide powder, which is then pulverized and passed through a 200-mesh sieve for later use. S2. Melting and blending: The dried polyester fiber chips, modified nano titanium dioxide powder, UV-resistant modifier, and antioxidant are added to a high-speed mixer and stirred and mixed at 100-120℃ for 20-30 minutes. Then, the mixture is fed into a twin-screw extruder and melt-blended at 260-280℃ to obtain composite masterbatch. S3. Melt spinning: The composite masterbatch is added to the hopper of the spinning machine, melted by screw extrusion, and then extruded by the spinneret to form nascent fibers. The extrusion temperature is controlled at 270-290℃, and the spinneret pressure is 5-8MPa. The nascent fibers are cooled by blowing air at a temperature of 20-25℃ and a speed of 0.5-1.2m / s. The cooled fibers are then evenly coated with spinning oil by an oiling device. The oiled fibers are then introduced into a drawing and texturing machine. The first draw ratio is controlled at 2.5-3.5 times, and the second draw ratio is controlled at 1.2-1.5 times. During the drawing process, the heating temperature is controlled at 80-90℃ in zone one, 120-130℃ in zone two, and the setting temperature is 130-140℃. The modified fibers are then wound to obtain the modified fibers. S4. Weaving: The modified fibers are twisted and twisted to a twist rate of 80-150 twists / meter to form ply yarns. The ply yarns are used as warp and weft yarns respectively. The warp yarns are warped by a warping machine at a warping speed of 200-300m / min and a warping tension of 5-15cN. The weft yarn is wound by a winding machine at a speed of 400-600 m / min and a winding tension of 3-8 cN; an air-jet loom is used, with the warp density set at 100-300 ends / 10cm and the weft density at 80-180 ends / 10cm, and the weaving speed at 300-400 r / min, to obtain a textile fiber fabric resistant to UV yellowing. The structure of the silane coupling agent is shown in Formula 1; Formula 1: .

2. The method for preparing a UV-resistant textile fiber fabric according to claim 1, characterized in that, The textile fiber fabric is composed of the following raw materials by weight: 60-80 parts polyester fiber chips, 2-5 parts nano titanium dioxide, 0.8-1.5 parts silane coupling agent, 2-5 parts UV resistant modifier, 0.5-1.5 parts antioxidant, 0.3-0.8 parts dispersant, 0.8-1.2 parts spinning oil, and 15-20 parts deionized water.

3. The method for preparing a UV-resistant textile fiber fabric according to claim 1, characterized in that, In step S1, the ultrasonic power is 300-800W and the ultrasonic time is 15-30min.

4. The method for preparing a UV-resistant textile fiber fabric according to claim 1, characterized in that, In step S2, the screw speed of the twin-screw extruder is 200-300 r / min, and the temperature distribution of each section is as follows: feeding section 200-220℃, compression section 240-260℃, homogenization section 260-280℃, and die head 270-280℃.

5. The method for preparing a UV-resistant textile fiber fabric according to claim 2, characterized in that, The polyester fiber chips are polyethylene terephthalate chips with an intrinsic viscosity of 0.60-0.75 dL / g.

6. The method for preparing a UV-resistant textile fiber fabric according to claim 2, characterized in that, The average particle size of the nano-titanium dioxide is 10-100 nm.

7. The method for preparing a UV-resistant textile fiber fabric according to claim 2, characterized in that, The UV-resistant modifier is composed of UV absorber UV-P and HALS 622 in a mass ratio of 1:

1.

8. The method for preparing a textile fiber fabric resistant to ultraviolet yellowing according to claim 2, characterized in that, The antioxidant is composed of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:

1.

9. The method for preparing a UV-resistant textile fiber fabric according to claim 2, characterized in that, The dispersant is one or more of naphthalene sulfonate condensate or lignin sulfonate.

10. The method for preparing a UV-resistant textile fiber fabric according to claim 2, characterized in that, The spinning oil is a composite spinning oil containing antistatic and lubricating components, with a kinematic viscosity of 30-70 mm. 2 / s.

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