Preparation process of swimsuit fabric

Abstract

The invention discloses a preparation process of a swimsuit fabric, belonging to the field of textile technology, and comprising a weaving process and a sunscreen treatment process. The invention adopts an emulsion interfacial polymerization method to transfer CeO2 particles into polyurethane shell microcapsules, thereby preparing microcapsules with anti-ultraviolet function; ultrasonic treatment is performed to allow fiber pores of the swimsuit fabric to accommodate the formed sol-gel, and the swimsuit fabric is filled with the sol-gel through ultrasonic penetration; formaldehyde is used to cause an acetalization reaction of the gel film layer under sulfuric acid, and acrylic acid is polymerized with acrolein dimethyl acetal during curing to form a dense cured film layer, thereby protecting CeO2 particles in the pores between fibers and providing a hydrophobic interface, preventing the swimsuit fabric from increasing light transmittance due to water adhesion, thereby improving the anti-ultraviolet performance; and the cured film layer protects the CeO2 particles so that they can still exist after multiple washings, thereby improving the durability of the anti-ultraviolet performance.

Description

Technical Field

[0001] The invention discloses a textile technology, in particular to a preparation process of swimsuit fabrics. Background Art

[0002] In order to reduce the resistance to water when swimming, the fabrics used in swimsuits are generally tight-fitting materials to reduce the contact area between water and the wearer. However, most of these clothes are not comfortable to wear and have limitations in terms of decorativeness.

[0003] Most swimsuits have average sun protection performance. For people who wear swimsuits outdoors, direct sunlight can easily cause skin damage. Conventional swimsuit fabrics mostly use fibers with high absorbance or coatings to achieve sun protection. However, when using fibers with high absorbance, when the swimsuit is soaked in water, the attached moisture increases the light transmittance, which reduces the anti-ultraviolet performance. In addition, most fibers with high absorbance can only absorb some wavelengths of ultraviolet rays and cannot cover most wavelengths of harmful ultraviolet rays. When using coatings, the sunscreen coating is easily degraded due to wear and tear from washing and other uses, and its service life cannot be extended. Therefore, a new swimsuit fabric is needed to achieve better anti-ultraviolet function. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation process of swimsuit fabric in order to solve the above problems.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a preparation process of a swimsuit fabric, comprising a weaving process and a sunscreen treatment process for the swimsuit fabric prepared by the weaving process, wherein the weaving process comprises the following steps:

[0006] The bottom knitting yarn is used to start the base, and the bottom knitting yarn is used to knit a false Siping structure. The front bed needle knitting and the back bed needle knitting are alternately arranged without connection. The first row is knitted on the front bed and the back bed with alternate needles, and the next two rows are knitted on the different needle beds of the previous row. The base fabric is used as the base fabric and a rib knitting method of alternating sesame point structure and air layer structure is used. The connecting part between the sesame point structure and the air layer structure is knitted with two rows of single-sided structure by alternate needle knitting. The two rows of single-sided structure in the connecting part are knitted with one row of front needle bed single-sided and one row of back needle bed single-sided. When closing the edges, one alternate vertical knitting is used at the edges of the base fabric and the surface layer.

[0007] The sunscreen treatment process includes the following steps:

[0008] A1. Mix the following anti-UV microcapsules, adhesive J-163, penetrant LM-1, softener polysiloxane, thickener FS-300H, and distilled water in a magnetic stirring kettle to prepare a slurry;

[0009] A2, immersing the swimsuit fabric in the slurry and padding it to a padding rate of 90%, and then repeating the padding, drying and baking steps at least twice to obtain a pre-treated swimsuit fabric;

[0010] A3, adding polyvinyl alcohol to a lithium chloride / dimethylacetamide solution system, mixing, heating and stirring, then cooling, sealing, and continuing to stir to obtain a polyvinyl alcohol-lithium chloride / dimethylacetamide solution, immersing swimwear fabric in the solution, adding borax, and forming a gel system, transferring the preliminarily treated swimwear fabric and the gel system to an ultrasonic machine, performing ultrasonic treatment, heating and increasing the pressure to continue the reaction, and evaporating the solvent to obtain a swimwear fabric with a gel film layer; immersing the swimwear fabric with the gel film layer in a formaldehyde solution, adding sulfuric acid for catalysis, clamping the swimwear fabric with a positioning frame, and repeatedly spraying the front and back surfaces of the swimwear fabric twice with a 30% acrylic acid solution mixed with 5wt% of an initiator, TPO, to obtain a spray-washed swimwear fabric;

[0011] A4, exposing the spray-washed swimsuit fabric to ultraviolet light, UV curing, and then drying in a drying drum to obtain the final treated swimsuit fabric;

[0012] The preparation of anti-ultraviolet microcapsules includes the following steps:

[0013] M1, dissolving CeO2 nanoparticles in anhydrous ethanol to form a CeO2-ethanol solution, placing the CeO2-ethanol solution in an ultrasonic machine for ultrasonic treatment, then stirring and heating it in a magnetic stirring kettle, adding 3-propylaminetriethoxysilane to the CeO2-ethanol solution, stirring again, and then adding triethylamine to the CeO2-ethanol solution to adjust the pH value and continue stirring to obtain a CeO2 dispersion;

[0014] M2, after the CeO2 dispersion is cooled by water isolation, the CeO2 dispersion is placed in a centrifuge to obtain a centrifugal dispersion, the centrifugal dispersion is washed three times with an ethanol solution and pure water, and the washed product is placed in a vacuum drying oven to dry to obtain a 3-propylaminetriethoxysilane-CeO2 complex;

[0015] M3, dissolving PVA in pure water as the aqueous phase, dividing the aqueous phase into two equal parts A and B, dissolving azole ether and isocyanate in butyl acetate solution as the oil phase, shearing the oil phase components in a shearing machine, and then dripping them into A to form emulsion C, transferring emulsion C into a magnetic stirring kettle for stirring, and adding polyethylene glycol. After stirring, the temperature is increased to carry out polymerization reaction, the temperature of the emulsion C reaction solution is increased, and 1,4-dihydroxybutane is added to the emulsion C reaction solution and stirred;

[0016] M4, after adding 3-propylamine triethoxysilane-CeO2 complex to B, ultrasonically treated it in an ultrasonic machine, and then added to the emulsion C reaction solution to form a mixed emulsion, the mixed emulsion was transferred to a magnetic stirring kettle for stirring, triethylenetetramine was added to the mixed emulsion, and stirring was continued to concentrate to obtain anti-UV microcapsules.

[0017] Preferably, the bottom braided yarn is prepared by melt spinning 98.5 parts by mass of PET powder and 1.5 parts of a mixed powder of TiO2 and CeO2 in a mass ratio of 1:1 as raw materials.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention increases the density coverage of swimsuit fabrics through a weft-knitted structure, compounds a silane coupling agent (3-propylamine triethoxysilane) with nano-CeO2 particles with UV shielding effect, and transfers the CeO2 particles into polyurethane shell microcapsules through emulsion interfacial polymerization, thereby preparing microcapsules with UV protection function;

[0020] Borax is added to a lithium chloride / dimethylacetamide solution to form a sol-gel system, and ultrasonic treatment is used to allow the fiber pores of the swimsuit fabric to accommodate the formed sol-gel, and ultrasonic penetration is used to fill the swimsuit fabric;

[0021] The gel film layer undergoes acetalization reaction in the presence of sulfuric acid using formaldehyde. The acrylic acid solution between the fibers of the swimsuit fabric then undergoes hydroxylation with the gel film layer, forming a layer of acrolein dimethyl acetal with hydrophobic groups on the swimsuit fabric. The layer of protection covers the upper and lower sides of the swimsuit.

[0022] The incompletely hydroxylated acrylic acid solution is cured under exposure to ultraviolet light through the initiator TPO, while the anti-ultraviolet microcapsules are broken, releasing the CeO2 particles into the pores between the fibers. At the same time, the acrylic acid polymerizes with acrolein dimethyl acetal during curing to form a dense cured film layer, thereby protecting the CeO2 particles in the pores between the fibers while having a hydrophobic interface, preventing the swimsuit fabric from increasing its light transmittance due to water adhesion, thereby improving the anti-ultraviolet performance. At the same time, the cured film layer protects the CeO2 particles so that they can still exist after multiple washings, thereby improving the durability of the anti-ultraviolet performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A simplified diagram of the knitting used on the needle bed for knitting false siping weave for the base yarn;

[0024] Figure 2 The sesame dot weave and air layer weave are used for the base yarn. Figure 1 ;

[0025] Figure 3The sesame dot weave and air layer weave are used for the base yarn. Figure 2 ;

[0026] Figure 4 is the absorbance of II and III with respect to ultraviolet light;

[0027] Figure 5 The UV transmittance corresponding to 6 different combination ratios of PET powder and mixed powder of TiO2 and CeO2;

[0028] Figure 6 The figure shows the uniformity and particle size of the slurry at the microscopic level using three amounts of anti-UV microcapsules. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] A preparation process for swimsuit fabrics includes a weaving process and a sunscreen treatment process for the swimsuit fabrics prepared by the weaving process. The weaving process includes the following steps:

[0031] The base fabric is woven with base yarn, such as Figure 1 As shown, the bottom knitting yarn is knitted into a false four-level weave, and the front bed needles are knitted without connection and the back bed needles are knitted without connection alternately. The first row is knitted on alternate needles on the front bed and the back bed, and the next two rows are knitted on different needle beds of the previous row. When the bottom knitting yarn is knitted, the needles are turned and knitted into a weft plain weave, and the needles are separated in the last row, thus completing the knitting of the bottom fabric.

[0032] The surface layer weaving and edge weaving are based on the base fabric and adopt rib weaving with alternating sesame point weave and air layer weave, such as Figure 2-Figure 3 As shown, the connecting part between the sesame point structure and the air layer structure is woven with 2 rows of single-sided structure by using alternate needle knitting. The 2 rows of single-sided structure in the connecting part are woven with 1 row of single-sided structure on the front needle bed and 1 row of single-sided structure on the back needle bed. When finishing, one-alternate vertical knitting is used at the edge of the base fabric and the surface layer. The density coverage of the swimsuit fabric is increased by using the weft knitting structure.

[0033] The bottom braided yarn is prepared by crushing PET slices with a crusher to obtain PET powder, drying it with TiO2 and CeO2 in a vacuum oven at a temperature of 100°C for 8 hours; mixing 98-100 parts by mass of PET powder with 0-2 parts of TiO2 and CeO2 in a mass ratio of 1:1 in a magnetic stirring kettle for 1 hour to obtain a mixed powder, feeding the mixed powder into a twin-screw extruder, and adopting multi-stage temperature control, with the temperatures of zone 1, zone 2, zone 3, zone 4, zone 5, die head and melt being 250°C, 275°C, 280°C, 280°C, 260°C, 260°C and 270°C respectively; the speed of the twin-screw extruder is 10 rpm, and the feeding speed is 5 rpm; after extrusion, the yarn is spun through a spinneret with an aperture of 0.2 mm and a hole number of 1200, and then cold-cut and hot-drawn to obtain the bottom braided yarn;

[0034] The mixed powder of TiO2 and CeO2 was added to PET for modification, and the UV-resistant modified PET fiber was prepared by a twin-screw melt blending method, and then melt-spinning was used to prepare the base braided yarn;

[0035] Among them, when preparing the bottom braided yarn, PET powder and TiO2 and CeO2 mixed powder adopt the following 6 combination ratios:

[0036] Ⅰ: 100 parts of PET powder;

[0037] II: 99.5 parts of PET powder, 0.5 parts of TiO2 powder;

[0038] III: 99.5 parts of PET powder, 0.5 parts of CeO2 powder;

[0039] IV: 99.5 parts of PET powder, 0.5 parts of TiO2 and CeO2 mixed powder;

[0040] V: 99 parts PET powder, 1 part TiO2 and CeO2 mixed powder;

[0041] VI: 98.5 parts of PET powder, 1.5 parts of TiO2 and CeO2 mixed powder;

[0042] The breaking strength was tested by standard tensile test, and the anti-ultraviolet performance was tested by UV spectrophotometer on 10×10cm samples of the above swimwear fabrics with different components. The UV wavelength was 250-400nm, barium sulfate was used as the bottom shield, the slit width was 20mm, the scanning interval was 0.5nm, and the UV transmittance was tested. Figure 4As shown in Figure 2, adding TiO2 powder and CeO2 powder separately to Ⅱ and Ⅲ can absorb ultraviolet rays and thus reduce the ultraviolet transmittance. Among them, TiO2 powder has a good absorption of ultraviolet rays in the range of 290-340nm, and when the wavelength exceeds 340nm, the absorption rate of TiO2 powder to ultraviolet rays decreases. At this time, the absorption rate of CeO2 powder to ultraviolet rays is greater than that of TiO2 powder. The reason is that TiO2 has a wider band gap energy and better absorption of medium and short ultraviolet rays. CeO2 has a large electronic layer structure and band gap width, and its shielding range for high-wavelength ultraviolet rays is also wider. Therefore, combining the two powders with TiO2 and CeO2 mixed powder as raw materials can improve the ultraviolet absorption rate of the bottom braided yarn in the UVA and UVB regions, as shown in Figure 2. Figure 5 As shown in Figures Ⅳ-VI, it can be seen that as the content of TiO2 and CeO2 mixed powder increases, the absorption rate of ultraviolet rays gradually increases, and the breaking strength is improved. However, when the TiO2 and CeO2 mixed powder reaches 1.5 parts, the breaking strength of the modified fiber begins to decrease. This is because the TiO2 and CeO2 mixed powder will increase the crystallinity of PET when the proportion is less than 1.5 parts, thereby playing a plasticizing effect, thereby improving the breaking strength of the bottom braided yarn. However, excessive TiO2 and CeO2 mixed powder will hinder the crystallization of polyester, resulting in an increase in impurities when the bottom braided yarn is spun, and reducing the breaking strength. In summary, 98.5 parts of PET powder and 1.5 parts of TiO2 and CeO2 mixed powder were selected as the ratio for preparing the bottom braided yarn.

[0043] The preparation of anti-ultraviolet microcapsules includes the following steps:

[0044] M1, dissolving CeO2 nanoparticles in anhydrous ethanol to form a 0.01 g / ml CeO2-ethanol solution, placing the CeO2-ethanol solution in an ultrasonic machine for ultrasonic treatment for 30 min, transferring it to an oil bath, stirring it in a magnetic stirring kettle and heating it to 70°C, adding 0.001 g / ml 3-propylaminetriethoxysilane to the CeO2-ethanol solution, stirring it again in a magnetic stirring kettle, and then adding triethylamine to the CeO2-ethanol solution to adjust the pH to 6, and stirring it at 70°C for 5 h to obtain a CeO2 dispersion;

[0045] M2, the CeO2 dispersion was cooled to 25°C in a water bath, and then the CeO2 dispersion was placed in a centrifuge and centrifuged at 3000 rpm for 30 min to obtain a centrifugal dispersion. The centrifugal dispersion was washed three times with ethanol solution and pure water, respectively, and the washed product was placed in a vacuum drying oven and dried at 60°C to obtain a 3-propylaminetriethoxysilane-CeO2 complex.

[0046] M3, dissolving 2 parts of the following PVA by mass in 100 parts of pure water as the aqueous phase, dividing the aqueous phase into two equal parts A and B, dissolving 6 parts of azole ether and 4 parts of isocyanate in 50 parts of butyl acetate solution as the oil phase, placing the oil phase component in a shearing machine and dripping it into A at a shear rate of 12000 rpm to form emulsion C, transferring emulsion C to a magnetic stirring kettle and stirring for 5 minutes, adding 2 parts of polyethylene glycol during stirring, and after stirring, heating to 40°C for 1 hour for polymerization reaction, raising the temperature of the emulsion C reaction solution to 60°C, adding 1 part of 1,4-dihydroxybutane to the emulsion C reaction solution, and stirring at 60°C for 1 hour;

[0047] M4, 0.1 parts of 3-propylamine triethoxysilane-CeO2 complex was added to B, and then ultrasonicated for 20 minutes in an ultrasonic machine. Then, the mixture was added to the reaction solution of emulsion C to form a mixed emulsion. The mixed emulsion was transferred to a magnetic stirring kettle and stirred at 60°C for 1 hour. 10 parts of triethylenetetramine was added to the mixed emulsion, and the mixture was stirred for another 1 hour and concentrated to obtain anti-UV microcapsules.

[0048] The silane coupling agent 3-propylamine triethoxysilane was selected to be compounded with nano-CeO2 particles with UV shielding effect, and the CeO2 particles were transferred into polyurethane shell microcapsules by emulsion interfacial polymerization to prepare microcapsules with UV protection function.

[0049] The sunscreen treatment process includes the following steps:

[0050] A1. Mix the following (by mass): 2-4 parts of anti-UV microcapsules, 4 parts of adhesive J-163, 0.3 parts of penetrant LM-1, 3 parts of softener polysiloxane, 0.9 parts of thickener FS-300H, and 20 parts of distilled water in a magnetic stirring kettle for 30 minutes to prepare a slurry.

[0051] like Figure 6 The figure shows the uniformity of the slurry at the microscopic level using three proportions (2, 3, and 4) of anti-UV microcapsules. When 2 proportions are used, the anti-UV microcapsules are relatively sparse and cannot cover the fibers of the swimsuit fabric in the subsequent process; when 3 proportions are used, the anti-UV microcapsules are evenly distributed, and the particle size of 900nm can better adhere to the fibers of the swimsuit fabric; when 4 proportions are used, the anti-UV microcapsules agglomerate, the particle size becomes larger, and cannot be dispersed on the fibers of the swimsuit fabric; in summary, 3 proportions of UV microcapsules are selected.

[0052] A2: Immerse the swimsuit fabric in the slurry and pad it for 1 hour, using a bath ratio of 1:20 and a padding speed of 3.8 r / min to obtain a swimsuit fabric with a liquid pick-up rate of 90%. Then, place the swimsuit fabric in a drying drum and dry it at 110°C for 20 minutes and bake it at 150°C for 2 minutes. Repeat the padding, drying, and baking steps at least twice to obtain a pre-treated swimsuit fabric.

[0053] A3: Add 10 parts of polyvinyl alcohol to 90 parts of a lithium chloride / dimethylacetamide solution system, with a mass ratio of lithium chloride / dimethylacetamide of 3:7. Heat the mixture to 70°C in a reactor and stir for 10 minutes. Cool to 25°C, seal the mixture for 3 hours, and continue stirring for 6 hours to obtain a lithium chloride / dimethylacetamide solution of polyvinyl alcohol. Immerse swimwear fabric in the lithium chloride / dimethylacetamide solution of polyvinyl alcohol. Add 0.1 g of borax to form a gel system. Transfer the preliminarily treated swimwear fabric and the lithium chloride / dimethylacetamide solution of polyvinyl alcohol to an ultrasonic machine for ultrasonic treatment for 30 minutes. Then, transfer the preliminarily treated swimwear fabric to an autoclave and heat to 100°C. Raise the pressure to 23 MPa and continue the reaction for 1 hour. After the solvent evaporates, a swimwear fabric with a gel film layer is obtained.

[0054] Borax is added to a lithium chloride / dimethylacetamide solution to form a sol-gel system, and ultrasonic treatment is used to allow the fiber pores of the swimsuit fabric to accommodate the formed sol-gel, and ultrasonic penetration is used to fill the swimsuit fabric;

[0055] A4: Immerse the swimsuit fabric with the gel film layer in a 35% formaldehyde solution at a bath ratio of 1:2, and add 0.1g / ml sulfuric acid to the solution for catalysis. After reacting at 70°C for 20 minutes, clamp the ends of the swimsuit fabric with a positioning frame. Then, spray-wash the swimsuit fabric twice on both sides with a 30% acrylic acid solution mixed with 5wt% initiator TPO. Spray-washed swimsuit fabric is obtained.

[0056] The gel film layer undergoes acetalization reaction in the presence of sulfuric acid through formaldehyde, and the acrylic acid solution between the fibers of the swimsuit fabric then undergoes hydroxylation with the gel film layer, forming a layer of acrolein dimethyl acetal with hydrophobic groups for protection of the swimsuit fabric.

[0057] A5: Expose the spray-washed swimsuit fabric to a UV lamp with a wavelength of 365 nm and an intensity of 80 mW / cm for 10 seconds. 2 After UV curing, the material is placed in a drying barrel and dried at 80°C for 30 minutes to obtain the final treated swimsuit fabric.

[0058] The incompletely hydroxylated acrylic acid solution is cured under exposure to ultraviolet light through the initiator TPO, while the anti-ultraviolet microcapsules are broken, releasing the CeO2 particles into the pores between the fibers. At the same time, the acrylic acid polymerizes with acrolein dimethyl acetal during curing to form a dense cured film layer, thereby protecting the CeO2 particles in the pores between the fibers while having a hydrophobic interface, preventing the swimsuit fabric from increasing its light transmittance due to water adhesion, thereby improving the anti-ultraviolet performance. At the same time, the cured film layer protects the CeO2 particles so that they can still exist after multiple washings, thereby improving the durability of the anti-ultraviolet performance.

[0059] 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 included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A process for preparing swimwear fabric, characterized in that: The invention comprises a weaving process and a sun protection treatment process for swimwear fabrics prepared by the weaving process, wherein the weaving process comprises the following steps: The bottom knitting yarn is used to start the base, and the bottom knitting yarn is used to knit a false Siping structure. The front bed needle knitting and the back bed needle knitting are alternately arranged without connection. The first row is knitted on the front bed and the back bed with alternate needles, and the next two rows are knitted on the different needle beds of the previous row. The base fabric is used as the base fabric and a rib knitting method of alternating sesame point structure and air layer structure is used. The connecting part between the sesame point structure and the air layer structure is knitted with two rows of single-sided structure by alternate needle knitting. The two rows of single-sided structure in the connecting part are knitted with one row of front needle bed single-sided and one row of back needle bed single-sided. When closing the edges, one alternate vertical knitting is used at the edges of the base fabric and the surface layer. The sunscreen treatment process includes the following steps: A1. Mix the following anti-UV microcapsules, adhesive J-163, penetrant LM-1, softener polysiloxane, thickener FS-300H, and distilled water in a magnetic stirring kettle to prepare a slurry; A2, immersing the swimsuit fabric in the slurry and padding it to a padding rate of 90%, and then repeating the padding, drying and baking steps at least twice to obtain a pre-treated swimsuit fabric; A3, adding polyvinyl alcohol to a lithium chloride / dimethylacetamide solution system, mixing, heating and stirring, then cooling, sealing, and continuing to stir to obtain a polyvinyl alcohol-lithium chloride / dimethylacetamide solution, immersing swimwear fabric in the solution, adding borax, and forming a gel system, transferring the preliminarily treated swimwear fabric and the gel system to an ultrasonic machine, performing ultrasonic treatment, heating and increasing the pressure to continue the reaction, and evaporating the solvent to obtain a swimwear fabric with a gel film layer; immersing the swimwear fabric with the gel film layer in a formaldehyde solution, adding sulfuric acid for catalysis, clamping the swimwear fabric with a positioning frame, and repeatedly spraying the front and back surfaces of the swimwear fabric twice with a 30% acrylic acid solution mixed with 5wt% of an initiator, TPO, to obtain a spray-washed swimwear fabric; A4, exposing the spray-washed swimsuit fabric to ultraviolet light, UV curing, and then drying in a drying drum to obtain the final treated swimsuit fabric; The preparation of anti-ultraviolet microcapsules includes the following steps: M1, dissolving CeO2 nanoparticles in anhydrous ethanol to form a CeO2-ethanol solution, placing the CeO2-ethanol solution in an ultrasonic machine for ultrasonic treatment, then stirring and heating it in a magnetic stirring kettle, adding 3-propylaminetriethoxysilane to the CeO2-ethanol solution, stirring again, and then adding triethylamine to the CeO2-ethanol solution to adjust the pH value and continue stirring to obtain a CeO2 dispersion; M2, after the CeO2 dispersion is cooled by water isolation, the CeO2 dispersion is placed in a centrifuge to obtain a centrifugal dispersion, the centrifugal dispersion is washed three times with an ethanol solution and pure water, and the washed product is placed in a vacuum drying oven to dry to obtain a 3-propylaminetriethoxysilane-CeO2 complex; M3, dissolving PVA in pure water as the aqueous phase, dividing the aqueous phase into two equal parts A and B, dissolving azole ether and isocyanate in butyl acetate solution as the oil phase, shearing the oil phase components in a shearing machine, and then dripping them into A to form emulsion C, transferring emulsion C into a magnetic stirring kettle for stirring, and adding polyethylene glycol. After stirring, the temperature is increased to carry out polymerization reaction, the temperature of the emulsion C reaction solution is increased, and 1,4-dihydroxybutane is added to the emulsion C reaction solution and stirred; M4, after adding 3-propylamine triethoxysilane-CeO2 complex to B, ultrasonically treated it in an ultrasonic machine, and then added to the emulsion C reaction solution to form a mixed emulsion, the mixed emulsion was transferred to a magnetic stirring kettle for stirring, triethylenetetramine was added to the mixed emulsion, and stirring was continued to concentrate to obtain anti-UV microcapsules.

2. The process for preparing a swimsuit fabric according to claim 1, wherein: The bottom braided yarn is prepared by melt spinning 98.5 parts by mass of PET powder and 1.5 parts of a mixed powder of TiO2 and CeO2 in a mass ratio of 1:1 as raw materials.

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