Multifunctional sun-proof fabric and processing technology thereof

Abstract

The invention discloses a multifunctional sunscreen fabric and a processing technology thereof, belonging to the field of textile technology. The surface of the sunscreen fabric is subjected to water-repellent treatment and a hydrophobic structure is molded by rolling with an embossing roller to reduce the contact area with a liquid medium through the synergistic effect of the microscopic hydrophobic structure and the hydrophobic finishing; the hydrophobic structure is mechanically balanced in the liquid medium to prevent the liquid medium from invading the recessed part between the hydrophobic structure, thereby further reducing the contact area between the sunscreen fabric and the liquid medium, and the function of hydrophobic drag reduction is achieved by reducing the contact area of ​​the solid-liquid interface; and the printing emulsion is subjected to printing film formation before reinforcing the water-repellent finishing and water-repellent re-strengthening, which does not affect the subsequent hydrophobic structure and water-repellent finishing of the sunscreen fabric, thereby improving the wearing appearance of the sunscreen fabric with the hydrophobic drag reduction function.

Description

Technical Field

[0001] The invention discloses a textile technology, in particular to a multifunctional sun-proof fabric and a processing technology thereof. Background Art

[0002] In swimming competitions, the improvement of swimming skills and physical strength is the most important factor in order to break the speed record. However, reducing the resistance of swimming suits to water has also become an important issue. Therefore, the fabrics used in swimsuits have been improved.

[0003] 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 are limited in decorativeness. In addition, the sun protection performance of swimsuits is average. For athletes who need to wear swimsuits for a long time to participate in training, long-term exposure to direct sunlight can easily cause skin damage and even cause redness, swelling, burning, pain, and even blisters, burning pain, skin desquamation and other symptoms that affect the health of athletes. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional sun-proof fabric and a processing technology thereof in order to solve the above-mentioned problems.

[0005] To achieve the above object, the present invention provides the following technical solution: a multifunctional sunscreen fabric, comprising a tissue structure:

[0006] GB1:23 / 21 / 10 / 12 / / ;

[0007] GB2:32 / 12 / 01 / 21 / / ;

[0008] The GB1 and GB2 are respectively made of open weave and closed weave, the transverse density of the weave structure is 30 yarns / cm, and the longitudinal density is 58 pattern cycles / cm, and the yarn of the weave structure is 40D / 12F full-dull nylon filament FDY and PA6 DTY 30D / 12F FD+40D spandex elastic fiber yarn;

[0009] The multifunctional sun-proof fabric is subjected to preliminary sun-proof composite treatment, including the following steps:

[0010] S1, preparation of water-repellent finishing agent: add 100g / L fluorine-based water-repellent finishing agent FP-01 and water enough to immerse the sunscreen fabric into a mixing bucket, then adjust the pH to 5 with 1g / L acetic acid solution, add 5g / L water-repellent synergist FP-11 and 4g / L penetrant , stirring the solution in a stirring barrel at 150 r / min for 5 min to obtain a water-repellent finishing agent;

[0011] S2, composite pretreatment of sunscreen fabrics, spraying titanium dioxide ceramic powder-polyurethane on the sunscreen fabric at a mass fraction of 5%, titanium dioxide ceramic powder is pre-dispersed in polyurethane melt and maintained at 170°C by ultrasonic heating, sprayed on the sunscreen fabric through a spinner, and then cooled to 100°C by a cold air gun, and finally the sunscreen fabric is immersed in an acetic acid solution with a pH of 5 for 1 hour, and then ventilated and dried for 2 hours after the immersion;

[0012] S3, water-repellent treatment of sunscreen fabrics, the sunscreen fabrics dried in S2 are placed in the water-repellent finishing agent prepared in S1 for 1 hour, then the treated sunscreen fabrics are placed in a drying barrel and dried at 110°C for 20 minutes, and baked at 150°C for 2 minutes, and the water-repellent treatment, padding, drying and baking are repeated at least 3 times to obtain the sunscreen fabrics with preliminary water-repellent treatment;

[0013] A multifunctional sun-proof fabric treatment process, using a sun-proof fabric with a preliminary water-repellent treatment, comprises the following steps:

[0014] S4, printing emulsion preparation, adding polytetrahydrofuran ether diol and polycaprolactone diol into a reaction kettle and vacuum dehydrating for 60 minutes at 105°C, and mixing the dehydrated polytetrahydrofuran ether diol and polycaprolactone diol according to the metering ratio. After cooling to 75°C, isophorone diisocyanate and hexamethylene diisocyanate were added, the temperature was raised to 90°C, and the reaction was continued for 2 hours. Then, diethylpentanediol and dimethylol propionic acid were added until the R value reached 1.7 to obtain a printing emulsion.

[0015] S5, preparing the adhesive paste, mixing the printing emulsion with the wetting and leveling agent polyethylene glycol, the defoaming agent polyether-modified polysiloxane, the thickening agent methyl cellulose and the color paste to prepare the printing adhesive paste;

[0016] S6, screen printing, printing the sunscreen fabric obtained by preliminary water repellent treatment in S3 by using a 160 mesh screen machine to control the printing paste thickness to be 3 mm, drying at 20° C. and then drying in a drying barrel at 130° C. for 2 min;

[0017] S7, reinforce water repellent finishing, soak the printed sunscreen fabric in 0.5% FAS / ethanol solution

[0018] The mixture was placed in a liquid and treated with ultrasound for 30 min, dried at 20 °C and then baked in a drying barrel at 130 °C for 2 h.

[0019] S8, water repellency is further enhanced, 50 mL / L of tetraethyl silicate and 105.6 g / L of FAS are added to 250 mL / L of ethanol and mixed evenly, then 80 mL / L of ammonia water / ethanol solution with a volume ratio of 1:25 is added and stirred in a reactor at 20°C for 12 hours to obtain a gel system solution, the sunscreen fabric is placed in the gel system solution and ultrasonically treated for 30 minutes, then dried at 20°C and placed in a drying barrel at 130°C for 1 hour to obtain the hydrophobic and drag-reducing sunscreen fabric.

[0020] Preferably, in S6, a hydrophobic structure is molded on the printed sunscreen fabric by rolling with an embossing roller.

[0021] Preferably, the hydrophobic structure is a uniformly distributed parabolic cone.

[0022] Preferably, in S4, the molar ratio of isophorone diisocyanate to hexamethylene diisocyanate is 2:1.

[0023] Preferably, in S4, the mass fractions of dimethylolpropionic acid and diethylpentanediol are 2% and 1.5%.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The surface of the sunscreen fabric is treated with water repellent and the hydrophobic structure is shaped by rolling with an embossing roller to reduce the contact area with the liquid medium through the synergistic effect of the microscopic hydrophobic structure and the hydrophobic finishing;

[0026] By using the mechanical balance of the hydrophobic structure in the liquid medium, the liquid medium is prevented from invading the recessed part between the hydrophobic structures, thereby further reducing the contact area between the sunscreen fabric and the liquid medium, and achieving the function of hydrophobic drag reduction by reducing the contact area of ​​the solid-liquid interface;

[0027] In addition, the printing emulsion is used for printing and film formation before reinforcing the water-repellent finishing and water-repellent re-strengthening, which does not affect the subsequent hydrophobic structure and water-repellent finishing of the sunscreen fabric, thereby improving the wearing appearance of the hydrophobic and drag-reducing functional sunscreen fabric;

[0028] When the gel hydrophobic film is formed, a fine raised air layer will be formed above the printed area. The air layer can isolate the external water from invading the printed area, thus playing a better protective role.

[0029] The combination of full-dull nylon filament and spandex elastic fiber yarn makes the fabric tighter due to the shrinkage of spandex. The gram weight of the fabric per square meter reaches 155g / m², which is much higher than the woven fabric of less than 100 grams. The increase in gram weight increases the thickness of the fabric. By spraying titanium dioxide ceramic powder-polyurethane composite sunscreen fabric, the polyurethane melt is cooled to compound the titanium dioxide ceramic powder onto the sunscreen fabric, which greatly increases the effect of shielding ultraviolet rays. The subsequent water-repellent treatment process forms a stable film structure on the surface, thereby ensuring both the sunscreen function and the waterproof performance of the sunscreen fabric. The film structure ensures that the titanium dioxide ceramic powder will not peel off under long-term use, thereby improving the durability of the sunscreen performance of the sunscreen fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a chart showing the effect of the molar ratio of isophorone diisocyanate and hexamethylene diisocyanate on the performance of printing emulsion;

[0031] Figure 2 This is a chart showing the effect of the mass fraction of diethylpentanediol on the performance of printing emulsion;

[0032] Figure 3 This is a chart showing the effect of the mass fraction of dimethylolpropionic acid on the performance of printing emulsion;

[0033] Figure 4 This is a chart showing the effect of R value on the performance of printing emulsion;

[0034] Figure 5 It is the appearance diagram of the hydrophobic structure with uniformly distributed parabolic cone shape;

[0035] Figure 6 This is a microscopic diagram of the hydrophobic structure in contact with the liquid medium;

[0036] Figure 7 Organization chart for sun protection fabrics. DETAILED DESCRIPTION

[0037] 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, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than 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.

[0038] A multifunctional sun-protective fabric, such as Figure 7 As shown, including the organizational structure:

[0039] GB1:23 / 21 / 10 / 12 / / ;

[0040] GB2:32 / 12 / 01 / 21 / / ;

[0041] GB1 and GB2 use open weave and closed weave respectively. The transverse density of the weave structure is 30 yarns / cm, and the longitudinal density is 58 pattern cycles / cm. The yarn of the weave structure is 40D / 12F full-dull nylon filament FDY and PA6 DTY 30D / 12F FD+40D spandex elastic fiber yarn;

[0042] Firstly, we use high-needle-number and high-density equipment and technology. There are 36 needles per inch involved in the weaving operation, and the lateral density is as high as 30 yarns / cm. The organization structure is:

[0043] GB1:23 / 21 / 10 / 12 / / ;

[0044] GB2:32 / 12 / 01 / 21 / / ;

[0045] Makes the fabric more compact and textured, with a vertical density of up to 58 pattern cycles / cm;

[0046] The combination of full-dull nylon filament and spandex elastic fiber yarn makes the fabric more compact due to the shrinkage of spandex. The fabric weight per square meter reaches 155g / m², which is much higher than the woven fabric of less than 100g. The increase in weight also increases the thickness of the fabric, greatly increasing the effect of shielding against ultraviolet rays.

[0047] A processing technology for multifunctional sun-proof fabric comprises the following steps:

[0048] S1, preparation of water-repellent finishing agent: add 100g / L fluorine-based water-repellent finishing agent FP-01 and water enough to immerse the sunscreen fabric into a mixing bucket, then adjust the pH to 5 with 1g / L acetic acid solution, add 5g / L water-repellent synergist FP-11 and 4g / L penetrant , stirring the solution in a stirring barrel at 150 r / min for 5 min to obtain a water-repellent finishing agent;

[0049] S2, composite pretreatment of sunscreen fabrics, spraying titanium dioxide ceramic powder in the tissue structure at a mass fraction of 5%, soaking the sunscreen fabric in an acetic acid solution with a pH of 5 for 1 hour, and then ventilating and drying it for 2 hours after the soaking;

[0050] S3, water-repellent treatment of sunscreen fabrics, the sunscreen fabrics dried in S2 are placed in the water-repellent finishing agent prepared in S1 for 1 hour, then the treated sunscreen fabrics are placed in a drying barrel and dried at 110°C for 20 minutes, and baked at 150°C for 2 minutes, and the water-repellent treatment, padding, drying and baking are repeated at least 3 times to obtain the sunscreen fabrics with preliminary water-repellent treatment;

[0051] A multifunctional sun-proof fabric treatment process, using a sun-proof fabric with a preliminary water-repellent treatment, comprises the following steps:

[0052] S4, printing emulsion preparation, adding polytetrahydrofuran ether diol and polycaprolactone diol into a reaction kettle and vacuum dehydrating for 60 minutes at 105°C, and mixing the dehydrated polytetrahydrofuran ether diol and polycaprolactone diol according to the metering ratio. After cooling to 75°C, isophorone diisocyanate and hexamethylene diisocyanate were added, the temperature was raised to 90°C, and the reaction was continued for 2 hours. Then, diethylpentanediol and dimethylol propionic acid were added until the R value reached 1.7 to obtain a printing emulsion.

[0053] In S4, the molar ratio of isophorone diisocyanate to hexamethylene diisocyanate is 2:1, such as Figure 1The figure shows the effect of the molar ratio of isophorone diisocyanate and hexamethylene diisocyanate on the performance of printing emulsion. When the molar ratio is small, due to the symmetrical linear structure of hexamethylene diisocyanate, the cross-linking property of the physical cross-linking point is enhanced, thereby increasing the elongation at break and reducing the breaking strength; when the molar ratio is large, the rigid structure of isophorone diisocyanate increases the gap between the molecular chains, the elongation at break decreases accordingly, and the breaking strength increases; by using isophorone diisocyanate and hexamethylene diisocyanate The two active isocyanate groups of isophorone diisocyanate synergistically improve the water-resistant performance of the emulsion. Among them, the side methyl group on the ring structure of isophorone diisocyanate produces a steric effect, which creates gaps between molecules and can improve the thickness of the printed film on the sunscreen fabric. Hexamethylene diisocyanate is a long straight chain structure, which can reduce the rigidity of the ring structure of isophorone diisocyanate. When the two are combined in a 2:1 molar ratio, they can cross-react in the macromolecule, reduce the low-temperature condensation effect, and improve the compatibility of the printed film with the sunscreen fabric.

[0054] The mass fractions of dimethylolpropionic acid and diethylpentanediol are 2% and 1.5%, respectively. As a small molecule chain extender, diethylpentanediol has a symmetrical molecular structure and two ethyl groups in the side chain, which increases the intermolecular repulsion and increases the steric hindrance, improves the solvent resistance after film formation, and improves the subsequent penetration performance of the printing emulsion. The printing film on the sunscreen fabric is more stable and has a higher bonding strength. The subsequent reinforcement of water-repellent finishing and water-repellent reinforcement will not affect the printing film. Figure 2 The figure shows the effect of the mass fraction of diethyl pentanediol on the performance of printing emulsion. As the mass fraction increases, the viscosity increases. As the hydrophilic groups of diethyl pentanediol increase, the intermolecular steric hindrance increases, the viscosity effect increases, and the viscosity increases. However, after reaching 2%, the viscosity is too high and is not suitable for printing. Therefore, diethyl pentanediol with a mass fraction of 1.5% is selected; the combination of dimethylol propionic acid and diethyl pentanediol can effectively improve the permeability of the film by virtue of the synergistic effect of the anionic hydrophilic group and the non-ionic hydrophilic group, thereby improving the bonding strength between the polyurethane emulsion and the substrate. Figure 3 The figure shows the effect of the mass fraction of dimethylolpropionic acid on the performance of printing emulsion. In order to ensure the actual production and stability of printing emulsion, dimethylolpropionic acid with a mass fraction of 2% is selected;

[0055] The R value is used to ensure the balance between the rigidity and elasticity of the printing emulsion. If the molecular weight is too large, the particle size in the printing emulsion will increase, resulting in a decrease in the stability of the printing emulsion. Figure 4 The figure shows the effect of R value on the performance of printing emulsion. After the printing film is formed, as the R value increases, the -NCO groups in the prepolymer increase, forming urea bonds CONH, increasing the intermolecular force, resulting in increased film hardness, reduced elongation at break, and increased breaking strength. When the R value is selected to be 1.7, the comprehensive performance of the printing emulsion is the best.

[0056] S5, preparing the adhesive paste, mixing the printing emulsion with the wetting and leveling agent polyethylene glycol, the defoaming agent polyether-modified polysiloxane, the thickening agent methyl cellulose and the color paste to prepare the printing adhesive paste;

[0057] S6, screen printing, printing the sunscreen fabric obtained by preliminary water repellent treatment in S3 by using a 160 mesh screen machine to control the printing paste thickness to be 3 mm, drying at 20° C. and then drying in a drying barrel at 130° C. for 2 min;

[0058] S7, reinforce water repellent finishing, soak the printed sunscreen fabric in 0.5% FAS / ethanol solution

[0059] The printed sunscreen fabric is placed in a water-repellent solution and treated with ultrasonic waves for 30 minutes, dried at 20°C, and then placed in a drying barrel at 130°C for 2 hours. When the printed sunscreen fabric is subjected to a reinforcing and water-repellent finishing in this way, since the printing paste component will not react with the FAS / ethanol solution, the reinforcing and water-repellent additive will adhere to the sunscreen fabric except the printed area during finishing. However, due to the difference in adhesion, a dense adhesion layer will be formed on the outer circle of the edge of the printed area, thereby further improving the firmness of the printing.

[0060] S8, water repellency is further enhanced, 50 mL / L of tetraethyl silicate and 105.6 g / L of FAS are added to 250 mL / L of ethanol and mixed evenly, and then 80 mL / L of ammonia water / ethanol solution with a volume ratio of 1:25 is added and stirred in a reactor at 20°C for 12 hours to obtain a gel system solution, and the sunscreen fabric is placed in the gel system solution and ultrasonically treated for 30 minutes, and then dried at 20°C and placed in a drying barrel at 130°C for 1 hour to obtain a hydrophobic drag reduction sunscreen fabric;

[0061] When the sunscreen fabric after the reinforced water-repellent finishing is put into the gel system, the gel forms a film on the sunscreen fabric under ultrasonic treatment, adheres to the surface of the sunscreen fabric to form a hydrophobic film, and the hydrophobic film continues to adhere to the hydrophobic structure shaped by the rolling method of the embossing roller, and because the outer ring of the edge of the printed area of ​​the sunscreen fabric has a dense adhesion layer formed by the reinforced water-repellent additive, due to the difference in adhesion, a fine raised air layer will be formed above the printed area when the hydrophobic film is formed, and the air layer can isolate the external water from invading the printed area, thereby playing a better protective role;

[0062] In S6, a hydrophobic structure is formed on the sunscreen fabric after printing by rolling with an embossing roller, and the hydrophobic structure is a uniformly distributed parabolic cone. After the hydrophobic structure is formed by rolling with the embossing roller, S7 is used for reinforcing water-repellent finishing and S8 is used for water-repellent re-strengthening to supplement the water-repellent performance of the sunscreen fabric after rolling and shaping to obtain a hydrophobic drag-reducing sunscreen fabric.

[0063] like Figure 5 and Figure 6 The figure shows the appearance of the uniformly distributed parabolic cone-shaped hydrophobic structure and a microscopic diagram after contacting with a liquid medium. When the group of hydrophobic structures contacts the liquid medium, the wetted part is subjected to four forces, namely gravity, liquid surface tension, liquid pressure and gas pressure. When the structure is adopted, the sunscreen fabric has a hydrophobic surface after water-repellent finishing, and when the liquid medium flows through the uniformly distributed parabolic cone shape, the four forces of the wetted part will balance each other, especially the gas pressure in the recessed part between the hydrophobic structure and the liquid surface tension in the papillary part constrain the liquid pressure, making it difficult for water molecules to invade the recessed part, resulting in a greatly reduced contact area between the liquid medium and the sunscreen fabric at the microscopic level. As shown in the figure, the contact inclination angle θ between the liquid medium and the hydrophobic structure is between 90° and 114°, thereby reducing the friction force when the liquid medium contacts the sunscreen fabric and reducing the resistance of the sunscreen fabric in water.

[0064] The reinforced water-repellent finishing and water-repellent reinforcing finishing of the gel system in S7 and S8 utilizes the combined effect of the micro-nano structure and the hydrophobic structure formed by the gel water-repellent process to increase the water flow velocity and sliding length of the sunscreen fabric in the liquid medium.

[0065] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multifunctional sun-proof fabric, characterized in that: Including organizational structure: GB1:23 / 21 / 10 / 12 / / ; GB2:32 / 12 / 01 / 21 / / ; The GB1 and GB2 are respectively made of open weave and closed weave, the transverse density of the weave structure is 30 yarns / cm, and the longitudinal density is 58 pattern cycles / cm, and the yarn of the weave structure is 40D / 12F full-dull nylon filament FDY and PA6 DTY 30D / 12F FD+40D spandex elastic fiber yarn; The multifunctional sun-proof fabric is subjected to preliminary sun-proof composite treatment, including the following steps: S1, preparation of water-repellent finishing agent: add 100g / L fluorine-based water-repellent finishing agent FP-01 and water enough to immerse the sunscreen fabric into a mixing bucket, then adjust the pH to 5 with 1g / L acetic acid solution, add 5g / L water-repellent synergist FP-11 and 4g / L penetrant , stirring the solution in a stirring barrel at 150 r / min for 5 min to obtain a water-repellent finishing agent; S2, composite pretreatment of sunscreen fabrics, spraying titanium dioxide ceramic powder-polyurethane on the sunscreen fabric at a mass fraction of 5%, titanium dioxide ceramic powder is pre-dispersed in polyurethane melt and maintained at 170°C by ultrasonic heating, sprayed on the sunscreen fabric through a spinner, and then cooled to 100°C by a cold air gun, and finally the sunscreen fabric is immersed in an acetic acid solution with a pH of 5 for 1 hour, and then ventilated and dried for 2 hours after the immersion; S3, water-repellent treatment of sunscreen fabrics, the sunscreen fabrics dried in S2 are placed in the water-repellent finishing agent prepared in S1 for 1 hour, then the treated sunscreen fabrics are placed in a drying barrel and dried at 110°C for 20 minutes, and baked at 150°C for 2 minutes, and the water-repellent treatment, padding, drying and baking are repeated at least 3 times to obtain the sunscreen fabrics with preliminary water-repellent treatment; The sunscreen fabric with preliminary water repellent treatment is treated, including the following steps: S4, printing emulsion preparation, adding polytetrahydrofuran ether diol and polycaprolactone diol into a reaction kettle and vacuum dehydrating for 60 minutes at 105°C, and mixing the dehydrated polytetrahydrofuran ether diol and polycaprolactone diol according to the metering ratio. After cooling to 75°C, isophorone diisocyanate and hexamethylene diisocyanate were added, the temperature was raised to 90°C, and the reaction was continued for 2 hours. Then, diethylpentanediol and dimethylol propionic acid were added until the R value reached 1.7 to obtain a printing emulsion. S5, preparing the adhesive paste, mixing the printing emulsion with the wetting and leveling agent polyethylene glycol, the defoaming agent polyether-modified polysiloxane, the thickening agent methyl cellulose and the color paste to prepare the printing adhesive paste; S6, screen printing, printing the sunscreen fabric obtained by preliminary water repellent treatment in S3 by using a 160 mesh screen machine to control the printing paste thickness to be 3 mm, drying at 20° C. and then drying in a drying barrel at 130° C. for 2 min; S7, reinforcement water repellent finishing, soaking the printed sunscreen fabric in 0.5% FAS / ethanol solution, and ultrasonically treating it for 30 min, drying it at 20 °C, and then baking it in a drying barrel at 130 °C for 2 h; S8, water repellency is further enhanced, 50 mL / L of tetraethyl silicate and 105.6 g / L of FAS are added to 250 mL / L of ethanol and mixed evenly, then 80 mL / L of ammonia water / ethanol solution with a volume ratio of 1:25 is added and stirred in a reactor at 20°C for 12 hours to obtain a gel system solution, the sunscreen fabric is placed in the gel system solution and ultrasonically treated for 30 minutes, then dried at 20°C and placed in a drying barrel at 130°C for 1 hour to obtain the hydrophobic and drag-reducing sunscreen fabric.

2. A multifunctional sunscreen fabric processing process, using the hydrophobic drag-reducing sunscreen fabric prepared in claim 1, characterized in that: In S6, a hydrophobic structure is molded on the printed sunscreen fabric by rolling with an embossing roller.

3. The processing technology of a multifunctional sun-proof fabric according to claim 2 is characterized in that: The hydrophobic structure is a uniformly distributed parabolic cone.

4. The processing technology of a multifunctional sun-proof fabric according to claim 3 is characterized in that: In S4, the molar ratio of isophorone diisocyanate to hexamethylene diisocyanate is 2:

1.

5. The processing technology of a multifunctional sun-proof fabric according to claim 4 is characterized in that: In S4, the mass fractions of the dimethylolpropionic acid and diethylpentanediol are 2% and 1.5%.

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