A mesh belt for high air permeability nonwoven fabric and a method for manufacturing the same
By employing a warp and weft weaving structure in the mesh belt and using modified polyester particles and polyolefin elastomers to prepare shaped polyester monofilament weft yarns, the production problem caused by the fixed air permeability of the mesh belt was solved, and stable air permeability and efficient production at different linear speeds were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI CHANGDA FABRICS CO LTD
- Filing Date
- 2023-06-05
- Publication Date
- 2026-06-26
AI Technical Summary
The air permeability of existing mesh belts is fixed and cannot be maintained at different production line speeds, resulting in fiber waste, machine wear, or increased production costs. Furthermore, the air permeability decreases at high speeds, affecting production efficiency.
It adopts a warp and weft weaving structure, with the warp being circular and the weft being right-angled trapezoids. By mixing modified polyester particles and polyolefin elastomers, irregularly shaped polyester monofilament wefts are prepared, which increases the contact area between the weft and the mesh belt and covers the gaps, increases the opening area, and improves air permeability.
Maintaining stable air permeability during high-speed operation reduces fiber waste and machine wear, lowers production costs, and improves the flatness and work efficiency of nonwoven fabrics.
Smart Images
Figure CN116752265B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of mesh belt technology, specifically relating to a high-breathability nonwoven mesh belt and its preparation method. Background Technology
[0002] Meltblown nonwoven fabric is made by melting polymer masterbatch or chips in a screw extruder, forming fibers through high-pressure spraying, stretching the short fibers with high-speed hot air, and bonding them together on a mesh belt to form a fiber web. Process parameters affecting the structure and properties of meltblown nonwoven fabric include extrusion rate, side air temperature, mesh belt speed, take-up distance, spinneret height, and seam spacing. During the production of meltblown nonwoven fabric, molten polymer is formed into ultrafine fibers through a meltblown nozzle, and these ultrafine fibers are adsorbed and laid flat on the surface of a mesh belt connected to an exhaust fan.
[0003] The air permeability of a mesh belt refers to the ability of air to pass through the fabric. The polyester monofilaments used to weave mesh belts are mostly circular or (almost) rectangular in cross-section. When weaving the mesh belt, a (diagonal) mesh is formed between the warp and weft threads. When the mesh belt conveyor is working, the negative pressure fan under the mesh belt will discharge the negative pressure stretching airflow on the mesh belt and make the fiber web adhere to the mesh belt under the negative pressure. As the mesh belt moves, it enters the next process, thus completing the nonwoven fabric production process.
[0004] When using polyester monofilaments to weave mesh belts, a twill mesh is formed between the warp and weft threads of the nonwoven fabric, giving the mesh belt a certain degree of air permeability. This facilitates the production process requirements of nonwoven fabrics. Once the mesh belt is produced, its air permeability is fixed and cannot be changed. Excessive air permeability causes microfibers to pass through the mesh, resulting in fiber waste and accelerated machine wear, making it difficult to separate the nonwoven fabric from the mesh belt. Conversely, insufficient air permeability requires a high-powered exhaust fan to adsorb and spread the microfibers on the mesh belt surface, but this increases friction between the mesh and the machine, increasing machine operating resistance and thus raising production and equipment maintenance costs.
[0005] When producing nonwoven fabrics of different weights, the speed of the conveyor belt varies. If normal production is achieved at low speeds, lateral airflow can be introduced from both sides of the conveyor belt when the production line needs to operate at high speeds, interfering with the belt's air permeability. Simultaneously, at high speeds, the lateral airflow interference increases, further affecting the belt's air permeability. To maintain normal production, it is generally necessary to increase the power of the exhaust fan or replace the mesh curtain, increasing workload and potentially damaging the equipment. Existing conveyor belts have fixed air permeability and are easily affected by the production line speed. There is no product that can change the air permeability while also providing good flatness. Therefore, a high-air-permeability conveyor belt for nonwoven fabrics and its preparation method are proposed. Summary of the Invention
[0006] The purpose of this invention is to provide a high-breathability nonwoven mesh belt and its preparation method to solve the problems in the background art.
[0007] The objective of this invention can be achieved through the following technical solutions:
[0008] A high-breathability nonwoven mesh belt is woven from warp and weft threads, with the warp threads having a circular cross-section and the weft threads having a right-angled trapezoidal cross-section.
[0009] The preparation method of this high-breathability nonwoven mesh belt includes the following steps:
[0010] Step 1: Mix modified polyester particles and polyolefin elastomer particles at a mass ratio of 19:1 to obtain a mixture. Add the mixture to a dryer and heat it to 105-110℃ at a rate of 0.65-0.7℃ / min at room temperature, hold for 5-6 hours, then heat it to 145-150℃ at a rate of 0.3-0.35℃ / min, hold for 10-12 hours, and then cool it to 60℃ at a rate of 0.5℃ / min to complete the drying and pre-crystallization of the mixture.
[0011] Step 2: Extrude the mixture using a twin-screw extruder, granulate it to obtain composite polyester granules; extrude the composite polyester granules using a monofilament extruder, wet and oil them, and wind them to prepare polyester monofilaments; the polyester monofilaments can be used to prepare warp and weft yarns with different cross-sectional shapes by setting different extrusion dies, and finally weave them into a high-breathability nonwoven fabric mesh belt using warp and weft weaving equipment.
[0012] Furthermore, the twin-screw extruder comprises five zones: zone one, zone two, zone three, zone four, and zone five, with the following operating parameters:
[0013] The temperature in zone 1 is 100℃, the temperature in zone 2 is 260-265℃, the temperature in zone 3 is 265-270℃, the temperature in zone 4 is 275-280℃, the temperature in zone 5 is 265-270℃, and the screw speed is 170-180 r / min.
[0014] Furthermore, the monofilament extruder includes three zones: Zone 1, Zone 2, and Zone 3. The operating parameters of the monofilament extruder are as follows:
[0015] The temperature in Zone 1 is 265-270℃, the temperature in Zone 2 is 295-300℃, and the temperature in Zone 3 is 295-300℃.
[0016] Furthermore, the modified polyester particles are prepared through the following steps:
[0017] Step 1: Dissolve phenylphosphonic acid in deionized water by stirring to obtain a 3% phenylphosphonic acid solution. Add sodium hydroxide to the phenylphosphonic acid solution and stir at 70-75℃ for 30-40 minutes. After cooling to room temperature, add a 1.7% zinc sulfate solution and continue stirring for 15-20 minutes. Filter and vacuum dry the filter residue at 60℃ to obtain zinc phenylphosphonate.
[0018] Step 2: Mix zinc phenylphosphonate and ethylene glycol under nitrogen protection and at 175-180℃ for 2.5-3 hours to obtain a pre-esterified liquid. Mix terephthalic acid and ethylene glycol under nitrogen protection, then add antimony trioxide and triphenyl phosphate, with antimony trioxide as a catalyst and triphenyl phosphate as a stabilizer. React under nitrogen protection and at 230-240℃ for 40-60 minutes. Then add the pre-esterified liquid and react directly at 270℃ for 2-3 hours via polycondensation. Then raise the temperature to 280℃ and continue the reaction for 30 minutes. Filter the product, wash it 2-3 times with deionized water, dry it, and pulverize it to obtain modified polyester particles.
[0019] Furthermore, the ratio of zinc phenylphosphonate to ethylene glycol is 6g:5g.
[0020] Furthermore, the ratio of terephthalic acid, ethylene glycol, antimony trioxide, triphenyl phosphate, and pre-esterification liquid is 15000g:7850g:5.5-6g:6g:2200g.
[0021] The beneficial effects of this invention are:
[0022] This invention relates to a high-breathability nonwoven fabric mesh belt. By incorporating irregularly shaped polyester monofilament weft yarns with a right-angled trapezoidal cross-section, and with the long base of the irregularly shaped monofilament weft yarns positioned at the top, the contact area between the microfiber and the mesh belt is increased. Simultaneously, the larger upper surface area of the face weft, resembling a brim, partially blocks the gaps in the mesh belt. When the mesh belt conveyor operates at high speed, lateral headwinds cannot pass through the gaps in the mesh belt but instead drift over the nonwoven fabric fiber web and the mesh belt itself, thus preventing the impact of lateral headwinds on the mesh belt's breathability during high-speed operation. Similarly, it also prevents some lateral airflow from entering the mesh belt, thereby solving the problem of reduced breathability of the mesh belt at high speeds.
[0023] Through structural design, the vertical edge of the weft yarn and the adjacent weft yarn increase the opening area without increasing the opening ratio. This increases the air permeability of the mesh belt while ensuring the high-speed stability of the mesh belt, improving the ventilation effect of the exhaust fan, and also giving the nonwoven fabric fibers a better laying effect. In the production process of nonwoven fabrics of different specifications, it is not necessary to replace the mesh belt, which helps to improve work efficiency.
[0024] The raw material for the mesh belt is modified by polymerizing zinc phenylphosphonate, which has flame-retardant properties, into the polyester molecules. This improves the compatibility of the flame-retardant material with other materials and promotes its uniform dispersion, thereby enhancing the density and flame-retardant effect of the polyester monofilament. Polyolefin elastomer particles are also incorporated during the preparation process. The modified polyester and polyolefin elastomer molecular chains become entangled, further improving the material's mechanical properties and meeting the requirements for preparing irregularly shaped polyester monofilament weft yarns. Attached Figure Description
[0025] The invention will now be further described with reference to the accompanying drawings.
[0026] Figure 1 This is a schematic diagram of the structure of the high-breathability nonwoven mesh belt of the present invention. Detailed Implementation
[0027] 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 some embodiments of the present invention, and not all 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.
[0028] Example 1
[0029] This embodiment provides a modified polyester particle, including the following implementation steps:
[0030] Step S1: Dissolve phenylphosphonic acid in deionized water by stirring to obtain a 3% phenylphosphonic acid solution. Add 0.7 kg sodium hydroxide to 100 L of phenylphosphonic acid solution and stir at 70 °C for 30 min. After cooling to room temperature, add 100 L of 1.7% zinc sulfate solution and continue stirring for 15 min. Filter and vacuum dry the filter residue at 60 °C to obtain zinc phenylphosphonate.
[0031] Step S2: Mix 3 kg of zinc phenylphosphonate and 2.5 kg of ethylene glycol and react under nitrogen protection and 175 °C for 2.5 h to obtain a pre-esterified liquid. Mix 37.5 kg of terephthalic acid and 19.625 kg of ethylene glycol, then add 13.75 g of antimony trioxide and 15 g of triphenyl phosphate, where antimony trioxide acts as a catalyst and triphenyl phosphate acts as a stabilizer. React under nitrogen protection and 230 °C for 40 min. Then add the above pre-esterified liquid and react at 270 °C for 2 h by direct polycondensation. Then raise the temperature to 280 °C and continue the reaction for 30 min. Filter the product, wash it twice with deionized water, dry it, and pulverize it to obtain modified polyester particles.
[0032] Example 2
[0033] This embodiment provides a modified polyester particle, including the following implementation steps:
[0034] Step S1: Dissolve phenylphosphonic acid in deionized water by stirring to obtain a 3% phenylphosphonic acid solution. Add 0.7 kg sodium hydroxide to 100 L of phenylphosphonic acid solution and stir at 72 °C for 35 min. After cooling to room temperature, add 100 L of 1.7% zinc sulfate solution and continue stirring for 18 min. Filter and vacuum dry the filter residue at 60 °C to obtain zinc phenylphosphonate.
[0035] Step S2: Mix 3 kg of zinc phenylphosphonate and 2.5 kg of ethylene glycol under nitrogen protection and at 178°C for 2.5-3 h to obtain a pre-esterified liquid; mix 37.5 kg of terephthalic acid and 19.625 kg of ethylene glycol under nitrogen protection, then add 14.5 g of antimony trioxide and 15 g of triphenyl phosphate, where antimony trioxide acts as a catalyst and triphenyl phosphate acts as a stabilizer, and react under nitrogen protection and at 235°C for 50 min. Then add the above pre-esterified liquid and react at 270°C for 2.5 h by direct polycondensation, then raise the temperature to 280°C and continue the reaction for 30 min. Filter the product, wash it twice with deionized water, dry it, and pulverize it to obtain modified polyester particles.
[0036] Example 3
[0037] This embodiment provides a modified polyester particle, including the following implementation steps:
[0038] Step S1: Dissolve phenylphosphonic acid in deionized water by stirring to obtain a 3% phenylphosphonic acid solution. Add 0.7 kg sodium hydroxide to 100 L of phenylphosphonic acid solution and stir at 75 °C for 40 min. After cooling to room temperature, add 100 L of 1.7% zinc sulfate solution and continue stirring for 20 min. Filter and vacuum dry the filter residue at 60 °C to obtain zinc phenylphosphonate.
[0039] Step S2: Mix 3 kg of zinc phenylphosphonate and 2.5 kg of ethylene glycol and react under nitrogen protection and at 180°C for 3 h to obtain a pre-esterified liquid. Mix 37.5 kg of terephthalic acid and 19.625 kg of ethylene glycol, then add 15 g of antimony trioxide and 15 g of triphenyl phosphate, where antimony trioxide acts as a catalyst and triphenyl phosphate acts as a stabilizer. React under nitrogen protection and at 240°C for 60 min. Then add the above pre-esterified liquid and react at 270°C for 3 h by direct polycondensation. Then raise the temperature to 280°C and continue the reaction for 30 min. Filter the product, wash it three times with deionized water, dry it, and pulverize it to obtain modified polyester particles.
[0040] Example 4
[0041] Please see Figure 1 This embodiment provides a mesh belt for high-breathability nonwoven fabric, including the following implementation steps:
[0042] The preparation method of this high-breathability nonwoven mesh belt includes the following steps:
[0043] Step 1: Mix the modified polyester particles and polyolefin elastomer particles from Example 1 by stirring to obtain a mixture. Add the mixture to a dryer and heat it to 105°C at room temperature at a rate of 0.65°C / min, hold it at that temperature for 5 hours, then heat it to 145°C at a rate of 0.3°C / min, hold it at that temperature for 10 hours, and then cool it down to 60°C at a rate of 0.5°C / min to complete the drying and pre-crystallization of the mixture.
[0044] Step 2: Extrude the mixture using a twin-screw extruder and granulate it to obtain composite polyester granules. The twin-screw extruder includes five zones: Zone 1, Zone 2, Zone 3, Zone 4, and Zone 5. The temperature of Zone 1 is 100℃, Zone 2 is 260℃, Zone 3 is 265℃, Zone 4 is 275℃, and Zone 5 is 265℃. The screw speed is 170 r / min.
[0045] Step 3: The composite polyester granules are extruded using a monofilament extruder. The monofilament extruder includes three zones: Zone 1 (265℃), Zone 2 (295℃), and Zone 3 (295℃). After wetting, oiling, and winding, polyester monofilaments are produced. Different warp and weft yarns with different cross-sectional shapes can be produced by setting different extrusion dies. The warp yarns have a circular cross-section, and the weft yarns have a right-angled trapezoidal cross-section. Finally, a high-permeability nonwoven fabric mesh belt is woven using a warp and weft weaving machine. After weaving, when viewed from the cross-section of the weft yarn, the long side is on top and the short side is on the bottom.
[0046] Example 5
[0047] Please see Figure 1 This embodiment provides a mesh belt for high-breathability nonwoven fabric, including the following implementation steps:
[0048] The preparation method of this high-breathability nonwoven mesh belt includes the following steps:
[0049] Step 1: Mix the modified polyester particles and polyolefin elastomer particles from Example 2 at a mass ratio of 19:1 to obtain a mixture. Add the mixture to a dryer and heat it to 108°C at a rate of 0.68°C / min at room temperature, hold it at that temperature for 5.5 hours, then heat it to 148°C at a rate of 0.32°C / min, hold it at that temperature for 11 hours, and then cool it down to 60°C at a rate of 0.5°C / min to complete the drying and pre-crystallization of the mixture.
[0050] Step 2: Extrude the mixture using a twin-screw extruder and granulate it to obtain composite polyester granules. The twin-screw extruder includes five zones: Zone 1, Zone 2, Zone 3, Zone 4, and Zone 5. The temperature of Zone 1 is 100℃, Zone 2 is 262℃, Zone 3 is 268℃, Zone 4 is 278℃, and Zone 5 is 268℃. The screw speed is 175 r / min.
[0051] Step 3: The composite polyester granules are extruded using a monofilament extruder. The monofilament extruder includes three zones: Zone 1 (268℃), Zone 2 (298℃), and Zone 3 (298℃). After wetting, oiling, and winding, polyester monofilaments are produced. Different warp and weft yarns with different cross-sectional shapes can be produced by setting different extrusion dies. The warp yarns have a circular cross-section, and the weft yarns have a right-angled trapezoidal cross-section. Finally, a high-permeability nonwoven fabric mesh belt is woven using a warp and weft weaving machine. After weaving, the long side is on top and the short side is on the bottom when viewed from the cross-section of the weft yarn.
[0052] Example 6
[0053] Please see Figure 1 This embodiment provides a mesh belt for high-breathability nonwoven fabric, including the following implementation steps:
[0054] The preparation method of this high-breathability nonwoven mesh belt includes the following steps:
[0055] Step 1: Mix the modified polyester particles and polyolefin elastomer particles from Example 3 at a mass ratio of 19:1 to obtain a mixture. Add the mixture to a dryer and heat it to 110°C at a rate of 0.7°C / min at room temperature, hold for 6 hours, then heat it to 150°C at a rate of 0.35°C / min, hold for 12 hours, and then cool it to 60°C at a rate of 0.5°C / min to complete the drying and pre-crystallization of the mixture.
[0056] Step 2: Extrude the mixture using a twin-screw extruder and granulate it to obtain composite polyester granules. The twin-screw extruder includes five zones: Zone 1, Zone 2, Zone 3, Zone 4, and Zone 5. The temperature of Zone 1 is 100℃, Zone 2 is 265℃, Zone 3 is 270℃, Zone 4 is 280℃, and Zone 5 is 270℃. The screw speed is 180 r / min.
[0057] Step 3: The composite polyester granules are extruded using a monofilament extruder. The monofilament extruder includes three zones: Zone 1 (270℃), Zone 2 (300℃), and Zone 3 (300℃). After wetting, oiling, and winding, polyester monofilaments are produced. Different warp and weft yarns with different cross-sectional shapes can be produced by setting different extrusion dies. The warp yarns have a circular cross-section, and the weft yarns have a right-angled trapezoidal cross-section. Finally, a high-permeability nonwoven fabric mesh belt is woven using a warp and weft weaving machine. After weaving, the long side is on top and the short side is on the bottom when viewed from the cross-section of the weft yarn.
[0058] Comparative Example 1: Based on Example 6, commercially available polyethylene terephthalate particles were used directly to replace the modified polyester particles in Example 3, while keeping the other steps unchanged, to prepare a mesh belt.
[0059] Comparative Example 2: Based on Example 6, without adding polyolefin elastomer particles, the remaining steps remained unchanged, and a mesh belt was prepared.
[0060] The polyolefin elastomer particles used in the examples and comparative examples were ExxonMobil 8230, the polyethylene terephthalate particles were purchased from Shanghai Yuanfang (brand name CB-602), and the spinning oil used for wetting was purchased from Nantong Hengrun New Material Technology Co., Ltd. (model UDY-2038).
[0061] To standardize testing, the diameter of the warp in the examples and comparative examples is 0.5 mm, the long side of the weft is 0.8 mm, the short side is 0.4 mm, and the height is 0.4 mm. However, actual applications are not limited to these specifications.
[0062] Performance tests were conducted on Examples 4-6 and Comparative Examples 1-2. The tensile strength and elongation at break of different weft yarns were tested using an engineering fiber tensile tester (the length inside the clamps at both ends of the weft yarn was 10 mm, the tensile speed was 20 mm / min, the test temperature was 25℃, and the ambient humidity was 50%). According to GB / T 2408-2008 "Test Methods for Flame Retardant Properties - Vertical Burning Method", samples with dimensions of 125 mm × 12 mm × 3 mm were prepared using the composite polyester particles from Examples 4-6 and Comparative Examples 1-2. Vertical burning tests were performed on different samples (flame retardant rating V0 > V1 > V2). The results are shown in Table 1.
[0063] Table 1
[0064]
[0065] As can be seen from Table 1, the polyester monofilaments prepared in Examples 4-6 have better mechanical properties and flame retardant effects.
[0066] Combining the practical application of high-breathability nonwoven mesh belts, by Figure 1 As can be seen, the hypotenuse of the weft thread is located in the forward direction of the conveyor belt, and the upper surface area of the face weft is relatively large, forming a brim shape, which partially blocks the gaps in the conveyor belt. When the conveyor belt is operating at high speed, lateral headwinds cannot pass through the gaps in the conveyor belt but instead drift over the nonwoven fiber web and the conveyor belt, thus avoiding the impact of lateral headwinds on the breathability of the conveyor belt during high-speed operation. Similarly, it also prevents some lateral airflow from entering the conveyor belt. This solves the problem of reduced breathability of the conveyor belt at high speeds.
[0067] Through structural design, the vertical edge of the weft yarn and the adjacent weft yarn increase the opening area without increasing the opening ratio. This increases the air permeability of the mesh belt while ensuring its high-speed stability, improves the ventilation effect of the exhaust fan, and also gives the nonwoven fabric fibers a better laying effect.
[0068] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A method for preparing a mesh belt for high air permeability nonwoven fabric, characterized in that, Includes the following steps: Step 1: Mix modified polyester granules and polyolefin elastomer granules at a mass ratio of 19:1 to obtain a mixture. Dry and pre-crystallize the mixture. The modified polyester particles are prepared through the following steps: Terephthalic acid and ethylene glycol were stirred and mixed, and then antimony trioxide and triphenyl phosphate were added. The mixture was reacted for 40-60 minutes under nitrogen protection and at 230-240℃. Then, pre-esterification liquid was added and the mixture was reacted for 2-3 hours at 270℃. The temperature was then raised to 280℃ and the reaction was continued for 30 minutes. The mixture was filtered, washed, dried, and pulverized to obtain modified polyester particles. Step 2: Extrude the mixture and cut it into pellets to obtain composite polyester granules; extrude the composite polyester granules, wet and oil them, and wind them to prepare polyester monofilaments; the polyester monofilaments are used to prepare warp yarns with circular cross-sections and weft yarns with right-angled trapezoidal cross-sections by setting different extrusion dies, and finally the warp and weft are woven into a mesh belt for high-breathability nonwoven fabric. After weaving, the long side is on top and the short side is on the bottom when viewed from the cross-section of the corresponding weft yarn.
2. The method for preparing a high-breathability nonwoven mesh belt according to claim 1, characterized in that, The specific method for drying and pre-crystallizing the mixture is as follows: add the mixture into a dryer, heat it to 105-110℃ at a rate of 0.65-0.7℃ / min, hold it at that temperature for 5-6 hours, then heat it to 145-150℃ at a rate of 0.3-0.35℃ / min, hold it at that temperature for 10-12 hours, and finally cool it down to 60℃ at a rate of 0.5℃ / min to complete the drying and pre-crystallization of the mixture.
3. The method for preparing a high-breathability nonwoven mesh belt according to claim 1, characterized in that, The ratio of terephthalic acid, ethylene glycol, antimony trioxide, triphenyl phosphate, and pre-esterification liquid is 15000g:7850g:5.5-6g:6g:2200g.
4. The method for preparing a high-breathability nonwoven mesh belt according to claim 1, characterized in that, The pre-esterified liquid is prepared by stirring and mixing zinc phenylphosphonate and ethylene glycol, and reacting them under nitrogen protection and at 175-180℃ for 2.5-3 hours to obtain the pre-esterified liquid.
5. The method for preparing a high-breathability nonwoven mesh belt according to claim 4, characterized in that, The ratio of zinc phenylphosphonate to ethylene glycol is 6g:5g.
6. The method for preparing a high-breathability nonwoven mesh belt according to claim 5, characterized in that, The zinc phenylphosphonate is prepared by the following steps: Sodium hydroxide was added to a 3% (w / w) phenylphosphonic acid solution, and the mixture was stirred at 70-75°C for 30-40 min. After cooling to room temperature, a 1.7% (w / w) zinc sulfate solution was added and the mixture was stirred for another 15-20 min. The mixture was then filtered and dried to obtain zinc phenylphosphonate.
7. A high-breathability nonwoven mesh belt, characterized in that, It is prepared by the preparation method described in any one of claims 1-6.