High-sunlight-resistant outdoor fabric and preparation process thereof

Abstract

The application relates to the field of outdoor fabrics, and particularly discloses a high-sunlight-resistant outdoor fabric and a preparation process thereof. The high-sunlight-resistant outdoor fabric comprises the following raw materials in mass percentage: BP-3 modified polyester particles 85-90%, an ultraviolet resistance agent 9-14% and an antioxidant 0.7-1%. The preparation method of the ultraviolet resistance agent comprises the following steps: (1) dispersing titanium dioxide in anhydrous ethanol, performing ultrasonic treatment, adding a silane coupling agent dropwise, adjusting the pH to 4-5, stirring and reacting at 50-55 DEG C for 1.5-2 h, and then washing and drying to obtain modified titanium dioxide; and (2) adding sodium carboxymethylcellulose into water, stirring and dissolving at 50-60 DEG C, adding the modified titanium dioxide, sorbitol and polyvinyl alcohol, performing ultrasonic treatment, and then drying to obtain the ultraviolet resistance agent. The application improves the high-sunlight-resistant performance of the outdoor fabric and maintains the softness of the fabric.

Description

Technical Field

[0001] This application relates to the field of outdoor fabrics, and more specifically, to an outdoor fabric resistant to high sunlight and its manufacturing process. Background Technology

[0002] Currently, the outdoor textile market is seeing a growing demand for weather resistance, especially resistance to high levels of sunlight. Existing outdoor fabrics primarily use polyester or nylon as the base material. While these offer some weather resistance and water resistance, traditional outdoor fabrics are prone to fading and becoming brittle after prolonged sun exposure, reducing product durability and aesthetics. Some products on the market improve their resistance to high levels of sunlight by adding UV absorbers or UV-protective coatings, but these methods often increase production costs and have limited effectiveness, failing to achieve long-lasting protection. Furthermore, excessive stiffness can negatively impact the fabric's feel.

[0003] Therefore, there is a need for an outdoor fabric with high sun resistance, which can maintain stable color and prevent significant fading or embrittlement after prolonged sun exposure, while also maintaining the fabric's softness. Summary of the Invention

[0004] In order to improve the high sun resistance of outdoor fabrics and maintain the softness of the fabrics, this application provides a high sun resistance outdoor fabric and its preparation process.

[0005] Firstly, this application provides an outdoor fabric resistant to high sunlight exposure, employing the following technical solution: A high-sunlight-resistant outdoor fabric comprises the following raw materials in weight percentages: 85-90% BP-3 modified polyester particles, 9-14% UV absorber, and 0.7-1% antioxidant; the method for preparing the UV absorber includes the following steps: (1) Disperse titanium dioxide in anhydrous ethanol, sonicate, add silane coupling agent dropwise, adjust pH to 4-5, stir reaction at 50-55℃ for 1.5-2h, wash and dry to obtain modified titanium dioxide; (2) Sodium carboxymethyl cellulose is added to water and stirred at 50-60℃ to dissolve. Modified titanium dioxide, sorbitol and polyvinyl alcohol are added, ultrasonically treated and dried to obtain an anti-ultraviolet agent.

[0006] By adopting the above technical solution, BP-3 modified polyester particles can absorb ultraviolet rays and convert light energy into heat energy, avoiding oxidative degradation of polyester particles and increasing the fabric's resistance to high sunlight. The UV-resistant agent uses a silane coupling agent to connect sodium carboxymethyl cellulose and titanium dioxide, which achieves refraction and efficient shielding of ultraviolet rays while maintaining the fabric's softness. Furthermore, the UV-resistant agent interacts with BP-3 modified polyester particles to further enhance the overall softness without affecting the light refraction and shielding effect of titanium dioxide.

[0007] Optionally, the mass ratio of sodium carboxymethyl cellulose to titanium dioxide is 1:1-2.

[0008] Optionally, the particle size of the titanium dioxide is in the range of 20-50 nm.

[0009] By employing the above technical solution, after the silane coupling agent is hydrolyzed, its silanol groups undergo a condensation reaction with the hydroxyl groups on the surface of titanium dioxide particles to form chemical bonds. Meanwhile, the organic functional groups at the other end form strong hydrogen bonds with the hydroxyl and carboxyl groups of sodium carboxymethyl cellulose molecules, creating a strong bridge between the titanium dioxide and sodium carboxymethyl cellulose matrix. This enhances the interfacial bonding force between titanium dioxide and sodium carboxymethyl cellulose, preventing titanium dioxide agglomeration. Furthermore, the hydroxyl groups of sorbitol form competitive hydrogen bonds with the sodium carboxymethyl cellulose molecular chains, weakening the interaction between the chains, increasing chain mobility, and preventing agglomeration due to the addition of titanium dioxide. This leads to embrittlement, but increases the softness and comfort of the fabric. The flexible segments of polyvinyl alcohol are interspersed between the sodium carboxymethyl cellulose molecular network, which can further buffer the rigidity effect of titanium dioxide. At the same time, sodium carboxymethyl cellulose molecules and the surface of modified polyester particles form a uniform and stable flexible adhesion layer on the particle surface through intermolecular hydrogen bonds and chain entanglement. This adhesion layer has good compatibility with the surface of modified polyester particles and effectively buffers stress, reduces the modulus gradient between titanium dioxide and BP-3 modified polyester particles, enhances the softness of the fabric, and does not affect the light refraction and shielding effect of titanium dioxide.

[0010] Optionally, the raw materials for the BP-3 modified polyester particles include polyester fibers and BP-3 in a mass ratio of 10:1-1.2.

[0011] Optionally, the preparation method of the BP-3 modified polyester particles includes the following steps: (1) Add BP-3 to DMSO, heat and stir until completely dissolved, add p-toluenesulfonic acid at standard temperature, stir and dissolve evenly to obtain BP-3 solution; (2) Add the polyester fiber to the potassium permanganate solution, stir evenly at 45-50℃ in an inert gas atmosphere, slowly add sulfuric acid solution, raise the temperature to 60-65℃, react for 1-2h, lower the temperature to 50-55℃, slowly add BP-3 solution, stir and react in the dark for 2-2.5h, filter, wash the fiber in a water bath at 65-70℃ for 1-2h, dry, crush and sieve to obtain BP-3 modified polyester particles.

[0012] Optionally, the BP-3 modified polyester particles undergo the following pretreatment: Dissolve 10-12 parts of sodium alginate in water by weight, add 1-3 parts of graphene, mix well to obtain a mixture, immerse 4-6 parts of BP-3 modified polyester particles in the mixture, stir well, dry, immerse in calcium chloride solution, wash and dry.

[0013] By adopting the above technical solution, sodium alginate and graphene are used to form a film to encapsulate BP-3 modified polyester particles. Potassium permanganate and sulfuric acid are used to oxidize and etch the surface of the polyester fiber to form a micro-nano rough structure, increasing the loading area of ​​BP-3. The benzophenone structure in BP-3 can absorb ultraviolet light and convert light energy into heat energy through intramolecular proton transfer. Graphene further quickly conducts the heat energy to the surface of the polyester particles and releases it into the air, avoiding photo-oxidative degradation reactions that cause ester bond breakage, preventing the fabric from fading or becoming brittle, improving the fabric's resistance to high sunlight and delaying the action time.

[0014] Optionally, the antioxidant is selected from at least one of EDTA, ascorbic acid, and vitamin E.

[0015] Secondly, this application provides a method for preparing an outdoor fabric resistant to high sunlight exposure, using the following technical solution: A method for preparing an outdoor fabric resistant to high sunlight exposure includes the following steps: Modified polyester particles, UV stabilizers, and antioxidants are mixed evenly, melt-spun, cooled, oiled, stretched, and heat-set to obtain polyester filaments, which can then be used to weave fabric.

[0016] By adopting the above technical solution, using modified polyester particles as the matrix, melt spinning combined with UV stabilizers, and using antioxidants to prevent oxidative degradation, the preparation process is simple and suitable for industrial production.

[0017] In summary, this application has the following beneficial effects: This application uses BP-3 modified polyester particles and UV stabilizers to produce outdoor fabrics resistant to high sunlight. The BP-3 modified polyester particles absorb and convert ultraviolet rays, while the UV stabilizers effectively reflect and shield ultraviolet rays. Furthermore, the UV stabilizers and BP-3 modified polyester particles form a uniform and stable flexible adhesive layer on the particle surface through intermolecular hydrogen bonds and chain entanglement, which effectively enhances the softness of the fabric without affecting the light refraction and shielding effect of the UV stabilizers, thus achieving high sunlight resistance and comfort of the fabric.

[0018] 2. This application uses a silane coupling agent to connect titanium dioxide and sodium carboxymethyl cellulose, which enhances the interfacial bonding force between titanium dioxide and sodium carboxymethyl cellulose, prevents titanium dioxide agglomeration, and improves high sun exposure resistance; sorbitol, polyvinyl alcohol and sodium carboxymethyl cellulose are used in combination to increase the softness of the fabric; sodium carboxymethyl cellulose forms a flexible adhesion layer with sodium alginate on the surface of polyester particles, which further improves the softness of the fabric.

[0019] 3. In this application, modified polyester particles are obtained by oxidative etching of polyester fibers and grafting BP-3. Sodium alginate and graphene form a film to encapsulate the modified polyester particles. BP-3 absorbs ultraviolet light and converts it into heat energy, which is then rapidly released into the air through graphene, thus avoiding the oxidative degradation of the polyester particles and improving the fabric's resistance to high sunlight. Detailed Implementation

[0020] The following embodiments provide a further detailed description of this application. Example of preparation of UV protectant

[0021] Titanium dioxide was purchased from Beasley New Materials (Suzhou) Co., Ltd., anatase, with particle sizes of 10nm, 20nm, and 50nm; silane coupling agent was purchased from Shandong Yifei Science and Trade Co., Ltd., model KH550.

[0022] Preparation Example 1 (1) 2g of titanium dioxide with a particle size of 20nm was dispersed in 100g of anhydrous ethanol, ultrasonically treated for 30min, 0.8g of silane coupling agent was added dropwise, the pH was adjusted to 4, the reaction was stirred at 55℃ for 2h, washed with water and dried at 60℃ for 12h to obtain modified titanium dioxide. (2) Add 2g of sodium carboxymethyl cellulose to 85g of water, stir and dissolve at 50°C, add 3g of modified titanium dioxide, 1.5g of sorbitol and 3g of polyvinyl alcohol, sonicate for 50min, and dry at 38°C for 6h to obtain an anti-ultraviolet agent.

[0023] Preparation Example 2 (1) 4g of titanium dioxide with a particle size of 50nm was dispersed in 200g of anhydrous ethanol, ultrasonically treated for 30min, 1.2g of silane coupling agent was added dropwise, the pH was adjusted to 5, the reaction was stirred at 50℃ for 1.5h, washed with water and dried at 60℃ for 12h to obtain modified titanium dioxide. (2) Add 2g sodium carboxymethyl cellulose to 85g water, stir and dissolve at 60℃, add 3g modified titanium dioxide, 1.5g sorbitol and 3g polyvinyl alcohol, sonicate for 50min, dry at 38℃ for 6h to obtain the UV protectant.

[0024] Preparation Example 3 The difference from Preparation Example 1 is that sorbitol is replaced by an equal amount of polyvinyl alcohol.

[0025] Preparation Example 4 The difference from Preparation Example 1 is that sorbitol and polyvinyl alcohol were not added.

[0026] Preparation Example 5 The difference from Preparation Example 1 is that the titanium dioxide with a particle size of 20 nm is replaced by an equal amount of titanium dioxide with a particle size of 10 nm. Preparation example of BP-3 modified polyester particles

[0027] BP-3 was purchased from Hubei Qifei Pharmaceutical Chemical Co., Ltd., with a purity of 99%; polyester fiber was purchased from Dongguan Jinshixiang Plastic Raw Materials Co., Ltd., with a purity of 99%.

[0028] Preparation Example 1 (1) Add 10g of BP-3 to 200g of DMSO and stir at 60℃ until completely dissolved. Add 1g of p-toluenesulfonic acid at standard temperature and stir until dissolved evenly to obtain a BP-3 solution. (2) Add 100g of polyester fiber to 1000g of potassium permanganate solution with a mass fraction of 5%, stir evenly at 50°C under nitrogen atmosphere, slowly add 150g of sulfuric acid solution with a mass fraction of 20%, heat to 60°C, react for 1h, cool down to 55°C, slowly add BP-3 solution obtained in step (1), stir and react in the dark for 2.5h, filter, boil and wash the fiber in a 65°C water bath for 2h, dry at 80°C for 6h, crush, and sieve through an 80-mesh sieve to obtain BP-3 modified polyester particles.

[0029] Preparation Example 2 (1) Add 12g of BP-3 to 200g of DMSO and stir at 60℃ until completely dissolved. Add 1g of p-toluenesulfonic acid at standard temperature and stir until dissolved evenly to obtain a BP-3 solution. (2) Add 100g of polyester fiber to 1000g of potassium permanganate solution with a mass fraction of 5%, stir evenly at 45°C under nitrogen atmosphere, slowly add 150g of sulfuric acid solution with a mass fraction of 20%, heat to 65°C, react for 2h, cool down to 50°C, slowly add BP-3 solution obtained in step (1), stir and react in the dark for 2h, filter, wash the fiber in a 70°C water bath for 1h, dry at 80°C for 6h, crush, and sieve through 80 mesh to obtain BP-3 modified polyester particles. Example

[0030] The polyester fiber was purchased from Dongguan Jinshixiang Plastic Raw Materials Co., Ltd., with a purity of 99%; the graphene was purchased from Shanghai Zhenzhun Biotechnology Co., Ltd., and was single-layer graphene.

[0031] Example 1: An outdoor fabric resistant to high sunlight, the raw material dosage is shown in Table 1, BP-3 modified polyester particles are prepared by the method in Example 1 of BP-3 modified polyester particle preparation; UV stabilizer is prepared by the method in Example 1 of UV stabilizer preparation; antioxidant is vitamin E.

[0032] The preparation method of the above-mentioned outdoor fabric resistant to high sunlight includes the following steps: Modified polyester particles, UV stabilizers, and antioxidants are mixed evenly and melt-spun (265℃, 1200m / min). The mixture is cooled by a ring blower (20℃, 0.6m / s), oiled with polyester oil, stretched on an 80℃ hot roller, and set at 160℃ for 1s to obtain polyester filaments. The polyester filaments are then used to weave fabric to produce outdoor fabric resistant to high sunlight exposure.

[0033] Table 1. Raw material usage of outdoor fabrics resistant to high sunlight in Examples 1-3. Raw materials / kg Example 1 Example 2 Example 3 Modified polyester particles 90 87 85 UV protectant 14 9 10 antioxidants 0.8 1 0.7 Example 2: An outdoor fabric resistant to high sunlight, the raw material dosage is shown in Table 1, BP-3 modified polyester particles are prepared by the method in Example 2 of BP-3 modified polyester particle preparation; UV stabilizer is prepared by the method in Example 2 of UV stabilizer preparation; antioxidant is vitamin E.

[0034] Example 3: An outdoor fabric resistant to high sunlight, the raw material dosage is shown in Table 1, BP-3 modified polyester particles are prepared by the method in Example 1 of BP-3 modified polyester particle preparation; UV stabilizer is prepared by the method in Example 2 of UV stabilizer preparation; antioxidant is vitamin E.

[0035] Example 4: An outdoor fabric resistant to high sunlight, which differs from Example 1 in that the UV-resistant agent is prepared using the method in Example 5 of UV-resistant agent preparation.

[0036] Example 5: An outdoor fabric resistant to high sunlight, differing from Example 1 in that the BP-3 modified polyester particles are pretreated using the following method: Dissolve 12g of sodium alginate in 488g of water, add 3g of graphene, mix well to obtain a mixture, immerse 6g of BP-3 modified polyester particles in the mixture, stir well, dry at 60℃ for 4h, immerse in 200g of 5% calcium chloride solution, wash with water, and dry at 80℃ for 6h.

[0037] Example 6: An outdoor fabric resistant to high sunlight, differing from Example 1 in that the BP-3 modified polyester particles are pretreated using the following method: Dissolve 10g of sodium alginate in 488g of water, add 1g of graphene, mix well to obtain a mixture, immerse 4g of BP-3 modified polyester particles in the mixture, stir well, dry at 60℃ for 4h, immerse in 200g of 5% calcium chloride solution, wash with water, and dry at 80℃ for 6h.

[0038] Example 7: An outdoor fabric resistant to high sunlight, the difference from Example 1 is that BP-3 modified polyester particles are replaced by an equal amount of polyester particles. The preparation method of polyester particles is: crush the polyester fiber and sieve it through an 80-mesh sieve. Comparative Example

[0039] Comparative Example 1: An outdoor fabric resistant to high sunlight, which differs from Example 1 in that the UV protectant is prepared using the method in UV protectant preparation Example 3.

[0040] Comparative Example 2: An outdoor fabric resistant to high sunlight, which differs from Example 1 in that the UV protectant is prepared using the method in UV protectant preparation Example 4. Performance testing

[0041] Outdoor fabrics resistant to high sunlight were prepared according to the methods in the examples and comparative examples, and their performance was tested according to the following methods. The test results are recorded in Table 2.

[0042]

[0043] 1. Sunlight fastness test: The outdoor fabrics with high sunlight fastness prepared in the examples and comparative examples were dyed at 130℃ using Disperse Yellow 163 at high temperature and pressure. 3cm × 10cm samples were cut from each fabric as test specimens, and 3cm × 10cm samples were cut from each fabric prepared in the examples and comparative examples as control specimens. Each sample was placed in a dark room, surrounded by opaque black cardstock, and then placed 60cm below a 40W ultraviolet lamp with the light source turned on. After 16 hours of irradiation by the 40W ultraviolet lamp, the samples were placed in the dark and allowed to stand for 2 hours. After standing, the samples and control specimens were then placed in a spectrophotometer. The color difference values ​​were measured using a photometric colorimeter, and the correlation between the samples and comparison samples in the examples and comparative examples was obtained. According to the CIE colorimetric system recommended by the International Commission on Illumination, the most commonly used is the CIE1967 (L*a*b*) uniform color space. Where L* indicates chromaticity, and a* and b* are chromaticity indices. The color difference formula is: △Emn=(△L*+△a*+△b*)1 / 2, where △Emn is the color difference value obtained by comparing the sample with the comparison sample. Therefore, when calculating the △L*, △a*, and △b* values, the sample test value is subtracted from the comparison sample test value, respectively.

[0044] 2. Bending stiffness: Tested using the KES weaving method, denoted as bending stiffness B.

[0045] Table 2 shows the test results of the outdoor fabrics with high sun resistance prepared in the examples and comparative examples. As shown in Table 2, the outdoor fabrics prepared in Examples 1-3 of this application exhibit good high-sunlight resistance and softness. Compared with Example 1, Example 4 shows a decrease in high-sunlight resistance, indicating that titanium dioxide with a particle size of 10nm is more prone to agglomeration than that with 20nm, resulting in a reduced UV shielding effect. Compared with Example 1, Examples 5 and 6 show an increase in high-sunlight resistance and softness, indicating that compared with directly using BP-3 modified polyester particles, graphene and sodium alginate coating of BP-3 modified polyester particles has a better effect on inhibiting oxidative degradation and increasing softness. Compared with Example 1, Example 7 shows that the lack of BP-3 leads to a decrease in the absorption of ultraviolet rays by the outdoor fabric, resulting in a significant decrease in high-sunlight resistance. Compared with Example 1, Comparative Examples 1 and 2 show a decrease in softness, which may be because the use of sorbitol alone or without sorbitol and polyvinyl alcohol cannot achieve synergistic toughening between components, leading to brittleness and reduced softness of the outdoor fabric.

[0046] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An outdoor fabric resistant to high sunlight exposure, characterized in that, The raw materials include the following percentages by weight: 85-90% BP-3 modified polyester granules, 9-14% UV stabilizer, and 0.7-1% antioxidant; the preparation method of the UV stabilizer includes the following steps: (1) Disperse titanium dioxide in anhydrous ethanol, sonicate, add silane coupling agent dropwise, adjust pH to 4-5, stir reaction at 50-55℃ for 1.5-2h, wash and dry to obtain modified titanium dioxide; (2) Sodium carboxymethyl cellulose is added to water and stirred at 50-60℃ to dissolve. Modified titanium dioxide, sorbitol and polyvinyl alcohol are added, ultrasonically treated and dried to obtain an anti-ultraviolet agent.

2. The outdoor fabric resistant to high sunlight according to claim 1, characterized in that, The mass ratio of sodium carboxymethyl cellulose to titanium dioxide is 1:1-2.

3. The outdoor fabric resistant to high sunlight according to claim 1, characterized in that, The particle size range of the titanium dioxide is 20-50 nm.

4. The outdoor fabric resistant to high sunlight according to claim 1, characterized in that, The raw materials for the BP-3 modified polyester particles include polyester fibers and BP-3 in a mass ratio of 10:1-1.

2.

5. The outdoor fabric resistant to high sunlight according to claim 4, characterized in that, The preparation method of the BP-3 modified polyester particles includes the following steps: (1) Add BP-3 to DMSO, heat and stir until completely dissolved, add p-toluenesulfonic acid at standard temperature, stir and dissolve evenly to obtain BP-3 solution; (2) Add the polyester fiber to the potassium permanganate solution, stir evenly at 45-50℃ in an inert gas atmosphere, slowly add sulfuric acid solution, raise the temperature to 60-65℃, react for 1-2h, lower the temperature to 50-55℃, slowly add BP-3 solution, stir and react in the dark for 2-2.5h, filter, wash the fiber in a water bath at 65-70℃ for 1-2h, dry, crush and sieve to obtain BP-3 modified polyester particles.

6. The outdoor fabric resistant to high sunlight according to claim 5, characterized in that, The BP-3 modified polyester particles undergo the following pretreatment: Dissolve 10-12 parts of sodium alginate in water by weight, add 1-3 parts of graphene, mix well to obtain a mixture, immerse 4-6 parts of BP-3 modified polyester particles in the mixture, stir well, dry, immerse in calcium chloride solution, wash and dry.

7. The outdoor fabric resistant to high sunlight according to claim 1, characterized in that, The antioxidant is selected from at least one of EDTA, ascorbic acid, and vitamin E.

8. A method for preparing the high-sunlight-resistant outdoor fabric according to any one of claims 1-7, characterized in that, Includes the following steps: Modified polyester particles, UV stabilizers, and antioxidants are mixed evenly, melt-spun, cooled, oiled, stretched, and heat-set to obtain polyester filaments, which can then be used to weave fabric.

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