Highly resistant to hydrostatic pressure and durable anti-ultraviolet polyester fabric and preparation method thereof

Abstract

The application discloses a kind of high hydrostatic pressure and durable uv resistant polyester cloth and preparation method thereof.Prepare the polyurethane coating containing ultraviolet absorber on polyester cloth first, then make waterproof ultraviolet resistant layer to obtain high hydrostatic pressure and durable uv resistant polyester cloth, the polyester cloth prepared by the method of the application has higher hydrostatic pressure performance and better mechanical properties, ultraviolet resistance.The polyester cloth containing polyurethane coating is immersed into functional solution containing fluorine-containing acrylate, crosslinking agent, emulsifier, antibacterial agent and ultraviolet absorber, waterproof ultraviolet resistant coating is made on both sides of the polyester cloth containing polyurethane coating, under the synergistic effect of polyurethane coating and waterproof ultraviolet resistant coating, the hydrostatic pressure of polyester cloth is greatly improved, and the hydrostatic pressure can reach 1351mmH2O, after 1000h of ultraviolet irradiation, the breaking strength of polyester cloth can still reach 1468N, and the elongation at break can still reach 31.8%.

Description

Technical Field

[0001] This invention relates to the field of outdoor tarpaulin products, and in particular to a high hydrostatic pressure resistant and durable UV-resistant polyester fabric and its preparation method. Background Technology

[0002] With the improvement of people's living standards and health awareness, reducing environmental pollution has become an urgent problem to be solved. In recent years, the continuous depletion of the ozone layer has led to an increase in ultraviolet radiation reaching the earth, which has had a huge impact on people's health and accelerated the aging of materials.

[0003] Polyester (polyethylene terephthalate) fiber has been widely used in tents, canvas, ropes, fishing nets, curtains, and other fields due to its advantages such as low cost, good wrinkle resistance and recyclability, dimensional stability, high heat resistance, and high mechanical strength. However, as a polyester fiber, its main drawback is its sensitivity to ultraviolet (UV) radiation. Under UV exposure or prolonged sunlight, its mechanical properties deteriorate rapidly due to the breaking of molecular bonds. Furthermore, since polyester is primarily used in outdoor fabrics, it must possess high hydrostatic pressure resistance to prevent water seepage during use.

[0004] There is little research on simultaneously improving the hydrostatic pressure resistance of polyester fibers and providing durable UV protection, and related patents are rarely reported. Some existing literature on preparation methods includes: (1) L. Zhang et al. reported in *Composites Part A*, 2021, 164.106405, using a two-step spraying technique: spraying polypropylene microparticles as the base layer, and then spraying polystyrene nanoparticles onto the microparticles as the top layer; these are then firmly bonded together with a low surface energy polymer adhesive to prepare a hydrophobic fabric. This fabric maintains superhydrophobicity for more than a month under a hydrostatic pressure of 0.1 MPa, or for more than 12 hours within 12 hours. However, this method is extremely costly and difficult to apply in actual production. (2) H. Yang et al. used atomic deposition to deposit TiO2-Al2O3 onto silk fibers in the journal ACS Applied Materials & Interfaces 2019, 11, 27426-27434. In this system, TiO2 can effectively absorb ultraviolet light, and Al2O3 acts as a free radical barrier layer to prevent secondary damage caused by free radicals generated by TiO2. However, when inorganic coatings are prepared on fabrics by atomic deposition, the coatings are prone to peeling off under long-term water pressure, which is not conducive to the actual use of outdoor products.

[0005] With the continuous progress and development of the textile industry, people are paying more and more attention to the special functional finishing of outdoor fabrics, and various coated fabrics are also constantly developing. At present, outdoor fabric products face the problem of not being able to simultaneously achieve high hydrostatic pressure resistance and durable UV resistance. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a high hydrostatic pressure resistant and durable UV-resistant polyester fabric and its preparation method. The method involves first preparing a polyurethane coating containing a UV absorber onto the polyester fabric, and then applying a waterproof and UV-resistant additive layer onto the polyurethane-coated polyester fabric to obtain the high hydrostatic pressure resistant and durable UV-resistant polyester fabric. This invention features a simple process, high production efficiency, and ease of large-scale application. The prepared polyester fabric exhibits high hydrostatic pressure resistance and durable anti-aging properties, making it highly suitable for outdoor tent fabrics.

[0007] To achieve the above objectives, the present invention provides a method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the method comprising the following steps:

[0008] (1) Preparation of polyurethane coating: Add crosslinking agent to polyurethane solution and stir to obtain polyurethane adhesive; add ultraviolet absorber to polyurethane adhesive and stir to prepare polyurethane coating;

[0009] (2) Coating composite: The polyurethane coating prepared in step (1) is applied to the polyester fabric by using a scraper coating method and dried to obtain a polyester fabric with polyurethane coating.

[0010] (3) Preparation of functional solution: Fluorinated acrylate, modified resin, diisocyanate, emulsifier, antibacterial agent and ultraviolet absorber are added to softened water and stirred to obtain functional solution.

[0011] (4) Preparation of functional polyester fabric: The polyester fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3), and the immersed polyester fabric is dried to obtain a high hydrostatic pressure resistant and durable UV resistant polyester fabric.

[0012] The polyurethane solution involved in this invention was purchased from Rudolf Chemical Co., Ltd., model PUYD3, and the modified resin involved was purchased from Suzhou Liansheng Chemical Co., Ltd., model PM-130.

[0013] In one embodiment of the present invention, in step (1), by weight, the polyurethane adhesive contains 40-60 parts of polyurethane solution and 1-2 parts of crosslinking agent, wherein the crosslinking agent includes methacrylic acid or acrylic acid, preferably methacrylic acid. In one embodiment of the present invention, in step (1), by weight, the ultraviolet absorber contains 0.5-1 part of ultraviolet absorber, wherein the ultraviolet absorber is a triazine ultraviolet absorber, preferably 2-hydroxyphenyltriazine.

[0014] In one embodiment of the present invention, in step (1), the stirring time of the polyurethane solution and the crosslinking agent is 10-20 min.

[0015] In one embodiment of the present invention, in step (1), the stirring time of the ultraviolet absorber and the polyurethane adhesive is 20-30 min.

[0016] In one embodiment of the present invention, in step (1), the polyurethane solution and methacrylic acid are cross-linked at room temperature, which increases the viscosity of the polyurethane solution and is beneficial to the uniformity of the distribution of the polyurethane coating when it is applied to the polyester fabric. 2-hydroxyphenyltriazine has a good absorption effect on ultraviolet rays, which protects the anti-aging degree of the polyurethane coating and further enhances the UV resistance of the polyester fabric.

[0017] In one embodiment of the present invention, in step (2), the scraper pattern is adjusted to 0.35-0.37cm, the drying temperature is 100-130℃, the processing time is 80-100s, and after drying, the polyester fabric coated surface feels dry and elastic.

[0018] In one embodiment of the present invention, in step (3), the amount of each component used in the preparation of the functional solution by weight is as follows: 30-80 parts of fluorinated acrylate, 5-30 parts of modified resin, 2-6 parts of diisocyanate, 0.5-1 part of emulsifier, 0.5-1 part of antibacterial agent, 5-10 parts of ultraviolet absorber, and 800-1200 parts of softened water.

[0019] In one embodiment of the present invention, in step (3), the fluorinated acrylate includes any one of perfluorohexyl ethyl acrylate, perfluorohexyl ethyl methacrylate, perfluorooctyl ethyl acrylate, perfluorodecyl ethyl acrylate, perfluorooctyl ethyl methacrylate, and perfluorodecyl ethyl methacrylate, preferably perfluorohexyl ethyl methacrylate.

[0020] In one embodiment of the present invention, in step (3), the modified resin is a modified polyurethane, purchased from Suzhou Liansheng Chemical Co., Ltd., model PM-130.

[0021] In one embodiment of the present invention, in step (3), the emulsifier is a nonionic emulsifier, including fatty alcohol polyoxyethylene ether and / or isomeric alcohol polyoxyethylene ether.

[0022] In one embodiment of the present invention, in step (3), the antibacterial agent is tetrachloroisophthalonitrile, and the ultraviolet absorber is a triazine ultraviolet absorber, preferably 2-hydroxyphenyltriazine.

[0023] In one embodiment of the present invention, the mixing time of perfluorohexyl ethyl methacrylate, modified resin, diisocyanate, fatty alcohol polyoxyethylene ether, tetrachloroisophthalonitrile, 2-hydroxyphenyltriazine and softened water in step (3) is 10-20 min. Perfluorohexyl ethyl methacrylate has a good waterproof, oil-proof and stain-proof effect, blocking the contact between the fabric and water in the air, which is beneficial to reducing the aging and degradation of the fabric. Modified resin is used to improve the hand feel of polyester fabric and make it more elastic. Diisocyanate, as a crosslinking agent, can increase the bonding strength between the auxiliary agent and the fiber. Fatty alcohol polyoxyethylene ether, as a surfactant, can change the surface tension of the auxiliary agent, which is beneficial to the penetration of the auxiliary agent into the fiber. Tetrachloroisophthalonitrile, as a broad-spectrum antibacterial agent, can play an antibacterial and antifungal role. 2-hydroxyphenyltriazine, as an anti-ultraviolet agent, can absorb ultraviolet rays.

[0024] In one embodiment of the present invention, the drying conditions for the functional polyester fabric in step (4) are a temperature of 160-180°C and a treatment time of 90-130 seconds. The high temperature helps the additives to fully crosslink and fully combine with the polyester fibers.

[0025] The present invention also provides a high hydrostatic pressure resistant and durable UV-resistant polyester fabric prepared according to the above preparation method.

[0026] The present invention also provides an application of the above-mentioned high hydrostatic pressure resistant and durable UV-resistant polyester fabric in outdoor tents, canvas, curtains and other fields.

[0027] Beneficial effects of the present invention

[0028] (1) The present invention prepares a polyurethane coating containing a UV absorber on a polyester fabric first, and then prepares a waterproof and UV-resistant auxiliary layer on the polyester fabric with the polyurethane coating to obtain a high hydrostatic pressure resistant and durable UV-resistant polyester fabric. The polyester fabric prepared by the method of the present invention has high hydrostatic pressure resistant performance, and at the same time, the polyester fabric has good mechanical properties and UV resistance.

[0029] (2) By immersing a polyester fabric with a polyurethane coating into a functional solution containing fluorinated acrylate, crosslinking agent, emulsifier, antibacterial agent and ultraviolet absorber, a waterproof and UV-resistant coating is made on both sides of the polyester fabric with a polyurethane coating. Under the synergistic effect of the polyurethane coating and the waterproof and UV-resistant coating, the hydrostatic pressure resistance of the polyester fabric is greatly improved, and its UV resistance is also increased.

[0030] (3) The hydrostatic pressure of the high hydrostatic pressure resistant and durable UV-resistant polyester fabric prepared by the method of the present invention can reach 1351 mmH2O. After 1000 hours of UV irradiation, the tensile strength of the polyester fabric can still reach 1468 N and the elongation at break can still reach 31.8%.

[0031] (4) The method of the present invention is simple in terms of process equipment, highly repeatable, and uses affordable raw materials, making it very suitable for large-scale production.

[0032] (5) The polyester fabric prepared by the present invention has high hydrostatic pressure resistance and durable UV resistance, making it very suitable for outdoor tarpaulin fabric. Attached Figure Description

[0033] Figure 1 The diagram shows the structure of the high hydrostatic pressure resistant and durable UV-resistant polyester fabrics prepared in Examples 1-5, where 1 is the waterproof and UV-resistant layer; 2 is the polyester base fabric; 3 is the polyurethane coating; and 4 is the waterproof and UV-resistant layer. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] The invention will be further illustrated below through specific embodiments:

[0036] The polyurethane solution used in the examples was purchased from Rudolf Chemical Co., Ltd., model PUYD3, and the modified resin used was purchased from Suzhou Liansheng Chemical Co., Ltd., model PM-130.

[0037] Example 1

[0038] A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the specific steps of which are as follows:

[0039] (1) Preparation of polyurethane coating: Add 1 part of methacrylic acid to 40 parts of polyurethane solution and stir for 10 min to obtain polyurethane adhesive. Slowly add 0.5 parts of 2-hydroxyphenyltriazine to polyurethane adhesive and stir for 20 min to prepare polyurethane coating.

[0040] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.35cm, the drying temperature was 100℃, and the drying time was 80s.

[0041] (3) Preparation of functional solution: 30 parts of perfluorohexyl ethyl methacrylate, 5 parts of modified resin, 2 parts of diisocyanate, 0.5 parts of fatty alcohol polyoxyethylene ether, 0.5 parts of tetrachloroisophthalonitrile and 5 parts of 2-hydroxyphenyl triazine were added to 800 parts of softened water and stirred for 10 min to obtain functional solution.

[0042] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3). By adjusting the pressure of the rolling mill, the liquid content is 50%. The impregnated polyester fabric is baked at 160°C for 90s to obtain a high hydrostatic pressure resistant and durable UV resistant polyester fabric.

[0043] A high hydrostatic pressure resistant and durable UV-resistant polyester fabric includes a polyester base layer 2, a polyurethane coating 3 coated on one side of the polyester base layer 2, and waterproof and UV-resistant layers 1 and 4 coated on the other side of the polyester base layer 2 and the polyurethane coating, respectively. Its structural analysis diagram is shown below. Figure 1 As shown.

[0044] Example 2

[0045] A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the specific steps of which are as follows:

[0046] (1) Preparation of polyurethane coating: Add 1.5 parts of methacrylic acid to 50 parts of polyurethane solution and stir for 15 min to obtain polyurethane adhesive. Slowly add 0.7 parts of 2-hydroxyphenyltriazine to polyurethane adhesive and stir at high speed for 25 min to prepare polyurethane coating.

[0047] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.36 cm, the drying temperature was 115℃, and the drying time was 90 s.

[0048] (3) Preparation of functional solution: 30 parts of perfluorohexyl ethyl methacrylate, 5 parts of modified resin, 2 parts of diisocyanate, 0.5 parts of fatty alcohol polyoxyethylene ether, 0.5 parts of tetrachloroisophthalonitrile and 5 parts of 2-hydroxyphenyl triazine were added to 800 parts of softened water and stirred for 10 min to obtain functional solution.

[0049] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3), and the liquid content is adjusted to 50% by adjusting the rolling pressure. The impregnated polyester fabric is baked at 160℃ for 90s. High hydrostatic pressure resistance and durable UV resistant polyester fabric are obtained.

[0050] A high hydrostatic pressure resistant and durable UV-resistant polyester fabric includes a polyester base layer 2, a polyurethane coating 3 coated on one side of the polyester base layer 2, and waterproof and UV-resistant layers 1 and 4 coated on the other side of the polyester base layer 2 and the polyurethane coating, respectively. Its structural analysis diagram is shown below. Figure 1 As shown.

[0051] Example 3

[0052] A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the specific steps of which are as follows:

[0053] (1) Preparation of polyurethane coating: Add 1.5 parts of methacrylic acid to 50 parts of polyurethane solution and stir at high speed for 15 min to obtain polyurethane adhesive. Slowly add 0.7 parts of 2-hydroxyphenyltriazine to polyurethane adhesive and stir at high speed for 25 min to prepare polyurethane coating.

[0054] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.36 cm, the drying temperature was 115℃, and the drying time was 90 s.

[0055] (3) Preparation of functional solution: 55 parts of perfluorohexyl ethyl methacrylate, 17 parts of modified resin, 4 parts of diisocyanate, 0.7 parts of fatty alcohol polyoxyethylene ether, 0.7 parts of tetrachloroisophthalonitrile and 7 parts of 2-hydroxyphenyl triazine were added to 1000 parts of softened water and stirred for 15 min to obtain functional solution.

[0056] (4) Preparation of functional polyester fabric: The polyurethane-coated polyester fabric prepared in step (2) is immersed in the functional solution prepared in step (3), and the liquid content is adjusted to 55% by adjusting the rolling pressure. The impregnated polyester fabric is baked at 170°C for 120s. High hydrostatic pressure resistance and durable UV-resistant polyester fabric are obtained.

[0057] A high hydrostatic pressure resistant and durable UV-resistant polyester fabric includes a polyester base layer 2, a polyurethane coating 3 coated on one side of the polyester base layer 2, and waterproof and UV-resistant layers 1 and 4 coated on the other side of the polyester base layer 2 and the polyurethane coating, respectively. Its structural analysis diagram is shown below. Figure 1 As shown.

[0058] Example 4

[0059] A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the specific steps of which are as follows:

[0060] (1) Preparation of polyurethane coating: Add 2 parts of methacrylic acid to 60 parts of polyurethane solution and stir for 20 min to obtain polyurethane adhesive. Slowly add 1 part of 2-hydroxyphenyltriazine to polyurethane adhesive and stir for 30 min to prepare polyurethane coating.

[0061] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.37 cm, the drying temperature was 130℃, and the drying time was 100 s.

[0062] (3) Preparation of functional solution: 55 parts of perfluorohexyl ethyl methacrylate, 17 parts of modified resin, 4 parts of diisocyanate, 0.7 parts of fatty alcohol polyoxyethylene ether, 0.7 parts of tetrachloroisophthalonitrile and 7 parts of 2-hydroxyphenyl triazine are added to 1000 parts of softened water and stirred for 10 to 20 minutes to obtain functional solution.

[0063] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3). By adjusting the rolling pressure, the liquid content is made to 55%. The impregnated polyester fabric is baked at 170°C for 120s to obtain a polyester fabric with high hydrostatic pressure resistance and durable UV resistance.

[0064] A high hydrostatic pressure resistant and durable UV-resistant polyester fabric includes a polyester base layer 2, a polyurethane coating 3 coated on one side of the polyester base layer 2, and waterproof and UV-resistant layers 1 and 4 coated on the other side of the polyester base layer 2 and the polyurethane coating, respectively. Its structural analysis diagram is shown below. Figure 1 As shown.

[0065] Example 5

[0066] A method for preparing a polyester fabric with high hydrostatic pressure resistance and durable UV protection is described below:

[0067] (1) Preparation of polyurethane coating: Add 2 parts of methacrylic acid to 60 parts of polyurethane solution and stir at high speed for 20 min to obtain polyurethane adhesive. Slowly add 1 part of 2-hydroxyphenyltriazine to polyurethane adhesive and stir at high speed for 30 min to prepare polyurethane coating.

[0068] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.37 cm, the drying temperature was 130℃, and the drying time was 100 s.

[0069] (3) Preparation of functional solution: 80 parts of perfluorohexyl ethyl methacrylate, 30 parts of modified resin, 6 parts of diisocyanate, 1 part of fatty alcohol polyoxyethylene ether, 1 part of tetrachloroisophthalonitrile and 10 parts of 2-hydroxyphenyl triazine were added to 1200 parts of softened water and stirred for 20 min to obtain functional solution.

[0070] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3). By adjusting the rolling pressure, the liquid content is made to 60%. The impregnated polyester fabric is baked at 180°C for 130s to obtain a polyester fabric with high hydrostatic pressure resistance and durable UV resistance.

[0071] A high hydrostatic pressure resistant and durable UV-resistant polyester fabric includes a polyester base layer 2, a polyurethane coating 3 coated on one side of the polyester base layer 2, and waterproof and UV-resistant layers 1 and 4 coated on the other side of the polyester base layer 2 and the polyurethane coating, respectively. Its structural analysis diagram is shown below. Figure 1 As shown.

[0072] Comparative Example 1

[0073] The difference between Comparative Example 1 and Example 5 is that the preparation methods of the polyester fabric are different.

[0074] A method for preparing a hydrostatic pressure resistant and UV-resistant polyester fabric, the specific steps of which are as follows:

[0075] (1) Base fabric preparation: Prepare a fabric with a weight of 270g / m 2 Polyester sample fabric.

[0076] (2) Preparation of functional solution: 80 parts of perfluorohexyl ethyl methacrylate, 30 parts of modified resin, 6 parts of diisocyanate, 1 part of fatty alcohol polyoxyethylene ether, 1 part of tetrachloroisophthalonitrile and 10 parts of 2-hydroxyphenyl triazine were added to 1200 parts of softened water and stirred for 20 min to obtain functional solution.

[0077] (3) Preparation of functional polyester fabric: The base fabric in step (1) is immersed in the functional solution prepared in step (2), and the liquid content is adjusted to 60% by adjusting the rolling pressure. The impregnated polyester fabric is baked at 180°C for 130s to obtain functional polyester fabric.

[0078] Comparative Example 2

[0079] The difference between Comparative Example 2 and Example 5 is that the preparation methods of the polyester fabric are different.

[0080] A method for preparing a hydrostatic pressure resistant and UV-resistant polyester fabric, the specific steps of which are as follows:

[0081] (1) Preparation of polyurethane coating: Add 2 parts of methacrylic acid to 60 parts of polyurethane solution and stir at high speed for 20 min to obtain polyurethane adhesive. Slowly add 1 part of 2-hydroxyphenyltriazine to polyurethane adhesive and stir at high speed for 30 min to prepare polyurethane coating.

[0082] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.37 cm, the drying temperature was 130℃, and the drying time was 100 s.

[0083] (3) Preparation of functional solution: 10 parts of 2-hydroxyphenyltriazine were added to 1200 parts of softened water and stirred for 20 minutes to obtain functional solution.

[0084] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3). By adjusting the rolling pressure, the liquid content is made to 60%. The impregnated polyester fabric is baked at 180°C for 130s to obtain hydrostatic pressure resistant and durable UV resistant polyester fabric.

[0085] Comparative Example 3

[0086] The difference between Comparative Example 3 and Example 5 is that the preparation methods of the polyester fabric are different.

[0087] A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, the specific steps of which are as follows:

[0088] (1) Preparation of polyurethane coating: Add 2 parts of methacrylic acid to 60 parts of polyurethane solution and stir at high speed for 20 min to prepare polyurethane coating.

[0089] (2) Coating lamination: The polyurethane coating prepared in step (1) was applied using a doctor blade coating method to a coating with a basis weight of 270 g / m². 2 On the polyester sample fabric, a polyester sample fabric with polyurethane coating was obtained by drying. The doctor blade size was 0.37 cm, the drying temperature was 130℃, and the drying time was 100 s.

[0090] (3) Preparation of functional solution: 80 parts of perfluorohexyl ethyl methacrylate, 30 parts of modified resin, 6 parts of diisocyanate, 1 part of fatty alcohol polyoxyethylene ether, and 1 part of tetrachloroisophthalonitrile were added to 1200 parts of softened water and stirred for 20 minutes to obtain functional solution.

[0091] (4) Preparation of functional polyester fabric: The polyester sample fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3), and the liquid content is adjusted to 60% by adjusting the rolling pressure. The impregnated polyester fabric is baked at 180℃ for 130s. High hydrostatic pressure resistance and durable UV resistant polyester fabric are obtained.

[0092] Performance testing: The polyester fabrics prepared in Examples 1-5 and Comparative Examples 1-3 were tested for hydrostatic pressure resistance according to BS EN20811 standard; the fabric samples were irradiated with ultraviolet light for 1000 hours according to AATCC186 textile weather resistance test standard; the radial strength and elongation of the initial fabric samples and the fabric samples after 1000 hours of ultraviolet irradiation were tested according to ASTM D5034 textile fabric breaking strength and elongation.

[0093] Table 1 below shows the performance test results of Examples 1-5 and Comparative Examples 1-3 of the present invention.

[0094] Table 1 shows the hydrostatic pressure resistance, tensile strength, and elongation at break of the polyester fabrics in Examples 1-5 and Comparative Examples 1-3 before and after UV irradiation.

[0095]

[0096]

[0097] A comparison of the test data from the examples and comparative examples in Table 1 reveals that the polyurethane coating significantly improves the hydrostatic pressure resistance and tear strength of polyester fabric. The polyurethane coating fills the gaps between the fibers, making it more difficult for water droplets to penetrate the polyester fabric; simultaneously, the combination of polyurethane, as an elastic material, with polyester fabric further enhances its mechanical strength. The addition of perfluorohexyl ethyl methacrylate, modified resin, diisocyanate, fatty alcohol polyoxyethylene ether, and tetrachloroisophthalonitrile significantly improves the hydrostatic pressure resistance of polyester fabric and, to some extent, mitigates the degradation of its mechanical properties under ultraviolet radiation. 2-Hydroxyphenyltriazine, as an ultraviolet absorbing agent, when added to the polyurethane coating and functional solution, significantly reduces the degradation of the polyester fabric's mechanical properties under ultraviolet radiation, but causes a slight decrease in the hydrostatic pressure resistance of the polyester fabric. This may be because the addition of 2-hydroxyphenyltriazine reduces the waterproofing effect of the waterproof and UV-resistant additive layer on the polyester fabric. Comparing the results of Comparative Examples 1 and 2 and Example 5, it can be seen that the hydrostatic pressure resistance of polyester fabric is significantly improved under the synergistic effect of polyurethane coating and waterproof and UV-resistant coating. Its hydrostatic pressure resistance is increased by 285% and 704% compared with polyester fabric containing only polyurethane coating and only waterproof and UV-resistant coating, respectively.

[0098] Obviously, the above embodiments and comparative examples are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0099] The embodiments provided above are not intended to limit the scope of the invention, nor are the described steps intended to limit the order of execution. Any obvious modifications made to the invention by those skilled in the art based on existing common knowledge also fall within the scope of protection defined in the claims of this invention.

Claims

1. A method for preparing a high hydrostatic pressure resistant and durable UV-resistant polyester fabric, characterized in that, The method includes the following steps: (1) Preparation of polyurethane coating: Add crosslinking agent dropwise to polyurethane solution and stir to obtain polyurethane adhesive; add ultraviolet absorber to polyurethane adhesive and stir to prepare polyurethane coating. According to the weight parts, the polyurethane adhesive contains 50-60 parts of polyurethane solution, 1.5-2 parts of crosslinking agent, and 0.7-1 parts of ultraviolet absorber. The crosslinking agent includes methacrylic acid or acrylic acid, and the ultraviolet absorber is a triazine ultraviolet absorber. (2) Coating composite: The polyurethane coating prepared in step (1) is applied to the polyester fabric by using a scraper coating method and dried to obtain a polyester fabric with polyurethane coating. (3) Preparation of functional solution: Fluorinated acrylate, modified resin, diisocyanate, emulsifier, antibacterial agent and ultraviolet absorber are added to softened water and stirred to obtain functional solution. According to the weight parts, the amount of each component used in the preparation of functional solution is: 55~80 parts of fluorinated acrylate, 17~30 parts of modified resin, 4~6 parts of diisocyanate, 0.7~1 parts of emulsifier, 0.7~1 parts of antibacterial agent, 7~10 parts of ultraviolet absorber, and 800~1200 parts of softened water. The modified resin is modified polyurethane PM-130 and the ultraviolet absorber is triazine ultraviolet absorber. (4) Preparation of functional polyester fabric: The polyester fabric with polyurethane coating prepared in step (2) is immersed in the functional solution prepared in step (3), and the immersed polyester fabric is dried to obtain a high hydrostatic pressure resistant and durable UV resistant polyester fabric.

2. The method according to claim 1, characterized in that, In step (1), the stirring time of the polyurethane solution and crosslinking agent is 10-20 min, and the stirring time of the ultraviolet absorber and polyurethane adhesive is 20-30 min.

3. The method according to claim 1, characterized in that, Step (2): Adjust the scraper pattern to 0.35-0.37cm, dry at 100-130℃, and process for 80-100s.

4. The method according to claim 1, characterized in that, In step (3), the fluorinated acrylate includes any one of perfluorohexyl ethyl acrylate, perfluorohexyl ethyl methacrylate, perfluorooctyl ethyl acrylate, perfluorodecyl ethyl acrylate, perfluorooctyl ethyl methacrylate, and perfluorodecyl ethyl methacrylate.

5. The method according to claim 1, characterized in that, In step (3), the emulsifier is a nonionic emulsifier, including fatty alcohol polyoxyethylene ether and / or isomeric alcohol polyoxyethylene ether, and the antibacterial agent is tetrachloroisophthalonitrile.

6. The high hydrostatic pressure resistant and durable UV-resistant polyester fabric prepared by the preparation method according to any one of claims 1 to 5.

7. The application of the high hydrostatic pressure resistant and durable UV-resistant polyester fabric according to claim 6 in the fields of outdoor tents, canvas, and curtains.

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