Manufacturing method of wear-resistant waterproof PU (polyurethane) football skin

Abstract

The invention discloses a manufacturing method of a wear-resistant waterproof PU material football skin, and relates to the technical field of football skin manufacturing, and the manufacturing method comprises the following steps: step 1, preparing a nano-reinforced wear-resistant waterproof PU outer layer material; step 2, preparing a soft elastic PU inner layer material; step 3, preparing a skin: performing co-extrusion molding on an inner layer material and an outer layer material by using multi-layer co-extrusion equipment, and performing drying and curing; fourthly, a 3D woven reinforcing structure is fused into the formed skin; 5, the surface of the skin is subjected to super-hydrophobic coating treatment, and wear-resistant particles are embedded; and step 6, carrying out pattern and pattern printing treatment on the skin by adopting silk-screen printing equipment, carrying out segmentation treatment on the PU leather by adopting die cutting equipment, and segmenting the PU leather into the skin with the same shape or different shapes, so that the problems of poor wear resistance and water resistance of the football skin are solved.

Description

Technical Field

[0001] The invention relates to the technical field of football surface cover manufacturing, and in particular to a method for manufacturing a football surface cover made of wear-resistant and waterproof PU material. Background Art

[0002] The surface of a football is usually made of multiple layers of material sewn or thermally bonded. Each piece of leather is screened to ensure that it is durable, has a good touch and elasticity. During the manufacturing process, synthetic materials such as polyurethane or polyvinyl chloride are selected. These materials are not only waterproof and wear-resistant, but also can maintain stable performance in various weather conditions. Through cutting technology, the material is cut into pentagonal and hexagonal small pieces that meet FIFA standards. Using sewing machines or thermal bonding technology, the small pieces are spliced ​​together to form a sphere. Finally, after quality inspection and air pressure testing, it is ensured that each football meets the requirements of the game and provides athletes with the best game experience.

[0003] For example, the Chinese authorized patent "A method for manufacturing highly elastic PVC football cover" with announcement number CN116808541A ​​includes the following steps: S1. Raw material preparation, weighing and preparing the PVC football cover; S2. Mixing, mixing the materials for preparing the PVC football cover at high speed, and kneading to obtain the PVC football cover base material; S3. Calendering, calendering the PVC football cover base material on the base cloth to form a PVC football cover semi-finished product; S4. Printing, printing the required pattern on the PVC football cover semi-finished product; S5. Molding, die-cutting with a die-cutting device to obtain a PVC football cover leather sheet, which contains 50 parts of PVC, 40-45 parts of plasticizer, 1.5-3 parts of polyvinyl chloride stabilizer, 4.5-8 parts of PVC multifunctional elastic additive, 15-20 parts of nitrile resin, 40-45 parts of filler, and 4-8 parts of color powder.

[0004] Although the above-mentioned existing technology can realize the production of football surface, since the football frequently touches the ground during use, it is prone to deformation, blistering or even rupture. At the same time, it is easy to absorb water in rain or humid weather, which causes the weight of the football to increase, further affecting the player's touch feeling and technical movements. Therefore, it does not meet the existing needs. In this regard, we propose a method for manufacturing a football surface made of wear-resistant and waterproof PU material. Summary of the invention

[0005] The purpose of the present invention is to provide a method for manufacturing a football surface made of wear-resistant and waterproof PU material, so as to solve the problem of poor wear resistance and waterproofness of the football surface mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a wear-resistant and waterproof PU material football surface, comprising the following steps:

[0007] Step 1: Preparation of nano-enhanced wear-resistant and waterproof PU outer layer material: disperse the nano-enhancer in water, add water-based polyurethane prepolymer, heat and stir evenly, add cross-linking agent and catalyst, adjust pH value, dry and solidify to obtain the outer layer material;

[0008] Step 2, preparation of soft elastic PU inner layer material: dissolving soft waterborne polyurethane prepolymer at a low speed, adding a cross-linking agent, stirring at a medium speed, filtering and degassing to obtain the inner layer material;

[0009] Step 3: Preparation of the skin: co-extrude the inner and outer layer materials using a multi-layer co-extrusion device, and dry and solidify;

[0010] Step 4: Integrate the 3D woven reinforcement structure into the formed skin: weave the fiber material, apply adhesive, fit the woven structure to the skin, and solidify;

[0011] Step 5: Treat the surface of the epidermis with a super-hydrophobic coating and embed wear-resistant particles;

[0012] Step 6: Use screen printing equipment to print patterns and designs on the surface, and use die-cutting equipment to split the PU leather into surfaces of the same or different shapes.

[0013] Preferably, the raw materials in step 1 include the following components in parts by weight: 100 parts of waterborne polyurethane prepolymer, 2-10 parts of nano-enhancer, 0.5-2 parts of dispersant, 1-5 parts of cross-linking agent, 0.1-0.5 parts of catalyst, appropriate amount of deionized water and appropriate amount of pH regulator.

[0014] Preferably, the solid content of the waterborne polyurethane prepolymer is 30%-50%, the nano-enhancer is surface-treated nanocellulose, and the particle size is controlled at 10-100 nm, wherein the surface treatment agent is a silane coupling agent, the dispersant is a polycarboxylate dispersant, the cross-linking agent is one or more of a polyamine and a carbodiimide, the catalyst is dibutyltin dilaurate, and the pH adjuster is ammonia water or acetic acid.

[0015] Preferably, in step 1, the dispersion time is 10-30 minutes; the heating and stirring temperature is 40-60°C; the stirring speed is 1000-3000rpm, and the stirring time is 10-20 minutes; the drying temperature is 60-80°C, and the drying and curing temperature is 2-4 hours.

[0016] Preferably, the raw materials in step 2 include the following components in parts by weight: 100 parts of soft water-based polyurethane prepolymer, 1.5-2.5 parts of cross-linking agent and an appropriate amount of deionized water.

[0017] Preferably, the solid content of the soft waterborne polyurethane prepolymer is 30%-40%, and the crosslinking agent is selected from one or more of a polyol crosslinking agent or a carbodiimide crosslinking agent.

[0018] Preferably, the stirring speed for dissolving the soft waterborne polyurethane prepolymer in step 2 is 200-400 rpm; the stirring speed after adding the crosslinking agent is 600-800 rpm, and the stirring time is 5-10 minutes; the filter mesh number for filtering the soft waterborne polyurethane solution is 100-200 mesh.

[0019] Preferably, in step three, the thickness of the inner layer material is set to 30%-50% of the total thickness, and the thickness of the outer layer material is correspondingly set to 50%-70%, the drying and curing temperature is 65±5° C., and the drying and curing time is 3-4 hours.

[0020] Preferably, the fiber material in step 4 is one of polyester fiber, aramid fiber and carbon fiber, and the fiber diameter is 0.1-0.5 mm; the thickness of the woven structure is 10%-30% of the total thickness of the epidermis; the curing temperature is 60-70°C, and the curing time is 1-2 hours.

[0021] Preferably, in the step 5, the super-hydrophobic coating material is one of a fluorine-containing polymer and a silane coupling agent; the wear-resistant particles are one of nano-silicon dioxide, alumina or silicon carbide, with a particle size of 10-100 nm; during the application of the super-hydrophobic coating, the coating thickness is maintained at 6-25 microns; the drying and curing temperature is 80-100°C, and the curing time is 1-2 hours; 7. The drying and curing temperature is 80-100°C, and the curing time is 0.5-1 hour.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention uses nano-enhancement technology to evenly disperse surface-treated nanocellulose in a PU matrix, significantly enhancing the wear resistance of the material. The small size and high specific surface area of ​​the nanoparticles enhance the interaction between them and the PU matrix, effectively resisting external friction and wear, and the treatment of the super-hydrophobic coating further improves the waterproofness of the football surface. Super-hydrophobic materials such as fluorinated polymers or silane coupling agents form a dense hydrophobic layer on the surface of the surface, effectively preventing water penetration, so that the football can maintain good performance in a humid environment.

[0024] 2. The soft elastic PU inner layer material of the present invention provides the softness and elasticity of the football surface, making the football have a good feel when touched. At the same time, the cross-linked structure of the inner layer material enhances its mechanical properties and durability. The integration of the 3D three-dimensional woven reinforcement structure enables the football surface to better disperse and withstand pressure when subjected to external forces, thereby enhancing the structural strength and stability of the surface. This woven structure can also effectively prevent the surface from being deformed or damaged after long-term use.

[0025] 3. The embedding of wear-resistant particles of the present invention further improves the wear resistance of the football surface. These particles form a hard protective layer on the surface of the surface, which effectively resists scratches and wear from sharp objects outside. The inner and outer layer materials are tightly combined through multi-layer co-extrusion technology to form a composite structure with excellent performance. This composite structure not only improves the overall performance of the football surface, but also makes it more durable during use and prolongs its service life.

[0026] 4. The materials used in the present invention are all environmentally friendly materials, such as water-based polyurethane prepolymer, nanocellulose, fluorine-containing polymers, etc. These materials will not cause pollution to the environment during use and meet environmental protection requirements. The durability and long service life of the football surface reduce the waste of resources and the burden on the environment. By improving the durability of the product, the need for frequent replacement is reduced, thereby reducing the consumption of raw materials and energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a flowchart of manufacturing a soccer ball surface. DETAILED DESCRIPTION

[0028] 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. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Embodiment 1:

[0030] A method for manufacturing a wear-resistant and waterproof PU material football surface, comprising the following steps:

[0031] Step 1, preparation of nano-enhanced wear-resistant and waterproof PU outer layer material: add 5 parts of surface-treated nanocellulose (particle size controlled at 50nm, surface treatment agent is silane coupling agent) to an appropriate amount of deionized water, use an ultrasonic disperser to disperse for 20 minutes to form a stable suspension; heat 100 parts of water-based polyurethane prepolymer (solid content of 40%) to 50°C, dissolve it in an appropriate amount of deionized water, and form a uniform aqueous polyurethane solution; slowly add the pretreated nano-enhancer suspension to the aqueous polyurethane solution while stirring, and add 1 part of polycarboxylate dispersant, use a high-speed stirrer to fully stir, so that the nanoparticles are evenly dispersed in the polyurethane matrix; add 3 parts of polyamine cross-linking agent, continue to stir until uniform, use ammonia water to adjust the pH value of the mixed solution to 8, add 0.3 parts of dibutyltin dilaurate catalyst to form an outer layer of nano-enhanced wear-resistant and waterproof PU; dry and cure the prepared outer layer material at 70°C for 3 hours;

[0032] Step 2, preparation of soft elastic PU inner layer material: 100 parts of soft water-based polyurethane prepolymer (solid content of 35%) are placed in a clean container, 25% of deionized water is slowly added, and agitation is performed at a low speed of 300 rpm with a stirrer to gradually dissolve the prepolymer in water, and stirring is continued until the prepolymer is completely dissolved. Under stirring, 2 parts of polyol cross-linking agent are slowly added to the soft water-based polyurethane solution, and the stirring speed is increased to 700 rpm to dissolve the cross-linking agent and fully mix with the soft water-based polyurethane solution. The adjusted soft water-based polyurethane solution is filtered through a 150-mesh filter to remove impurities and particles, and a vacuum degassing machine is used for degassing;

[0033] Step 3, preparation of the epidermis: the soft elastic PU inner layer material is loaded into different barrels of the multi-layer co-extrusion equipment respectively, and the prepared nano-enhanced wear-resistant and waterproof PU outer layer material is loaded into another barrel, and the multi-layer co-extrusion equipment is started, and the extrusion speed of each barrel is adjusted to the set value to ensure that the inner and outer layer materials can be extruded simultaneously and evenly. Through the co-extrusion die head, the inner and outer layer materials are extruded simultaneously to form a multi-layer composite structure. At this time, the thickness of the inner layer material as the core layer is controlled at 70%, and the outer layer material is wrapped on the outside of the inner layer material, and the thickness is controlled at 30%. The extruded multi-layer composite structure is guided to the molding mold and molded according to the design requirements of the football. During the molding process, the appropriate traction speed and pressure are maintained to make the multi-layer composite structure fit closely to the mold surface. The molded multi-layer composite structure is placed in an oven and dried and cured at 65°C for 4 hours;

[0034] Step 4: Select high-strength polyester fiber with a fiber diameter of 0.3mm and a braided structure thickness of 20% of the total thickness of the epidermis. Set the braiding size of the 3D braiding machine according to the size and shape of the epidermis, and use the 3D braiding machine to weave the fiber material. After weaving, apply polyurethane adhesive to the position where the epidermis needs to be integrated into the braided reinforcement structure, place the braided 3D braided reinforcement structure on the inner wall of the epidermis according to the designed position, use a pressure roller to fit the braided structure to the epidermis tightly, wait for enough time to allow the braided structure to be firmly bonded to the epidermis according to the curing time of the adhesive, and place the fused epidermis in an oven at a curing temperature of 65°C for 1.5 hours.

[0035] Step 5, select a fluorine-containing polymer, prepare a coating solution, select nano-silica as wear-resistant particles, wipe the surface of the epidermis with ethanol, and use a dip coating method to evenly apply the super-hydrophobic coating solution to the surface of the epidermis. The coating thickness is 15 microns. The coated epidermis is placed in an oven for drying and curing. The drying and curing temperature is 90°C and the curing time is 1.5 hours. After curing, the epidermis is removed and allowed to cool naturally to room temperature. The wear-resistant particles are added to ethanol and dispersed using an ultrasonic disperser to ensure that the particles are evenly dispersed in the solvent. After the super-hydrophobic coating is dried and cured, the particle dispersion is evenly applied to the surface of the epidermis using a brush coating method. Secondary drying and curing, the epidermis embedded with the particles is placed in an oven again. The secondary drying and curing time is 0.75 hours. After curing, the epidermis is removed and allowed to cool naturally to room temperature.

[0036] Step 6. Fix the prepared skin on the printing table, apply the ink evenly on the screen, and then use a scraper to scrape the screen at a certain speed and pressure to make the ink pass through the mesh and print on the skin. According to the complexity of the pattern, perform multiple printings. After each printing, wait for the ink to dry completely before the next printing. After printing, put the skin into the drying equipment for drying to ensure that the ink is completely cured. Fix the printed skin on the workbench of the die-cutting equipment, start the die-cutting equipment, and use the die-cutting knife to cut the skin according to the shape and size on the drawing. After cutting, remove the waste on the skin to obtain the ball skin pieces that meet the requirements. Arrange the cut ball skin pieces as required and set them aside. Finally, sew to complete the production of the football.

[0037] Embodiment 2:

[0038] A method for manufacturing a wear-resistant and waterproof PU material football surface, comprising the following steps:

[0039] Step 1, preparation of nano-enhanced wear-resistant and waterproof PU outer layer material: add 8 parts of surface-treated nanocellulose (particle size controlled at 80nm, surface treatment agent is silane coupling agent) into an appropriate amount of deionized water, and use an ultrasonic disperser to disperse for 15 minutes to form a stable suspension; heat 100 parts of water-based polyurethane prepolymer (solid content is 35%) to 45°C, dissolve it in an appropriate amount of deionized water, and form a uniform aqueous polyurethane solution; slowly add the pretreated nano-enhancer suspension to the aqueous polyurethane solution while stirring, and add 1.5 parts of polycarboxylate dispersant, use a high-speed stirrer to fully stir, so that the nanoparticles are evenly dispersed in the polyurethane matrix; add 4 parts of carbodiimide cross-linking agent, continue to stir until uniform, use acetic acid to adjust the pH value of the mixed solution to 7.5, add 0.4 parts of dibutyltin dilaurate catalyst to form an outer layer of nano-enhanced wear-resistant and waterproof PU; dry and cure the prepared outer layer material at 65°C for 4 hours;

[0040] Step 2, preparation of soft elastic PU inner layer material: 100 parts of soft water-based polyurethane prepolymer (solid content of 30%) are placed in a clean container, 20% of deionized water is slowly added, and agitation is performed at a low speed of 250 rpm with a stirrer to gradually dissolve the prepolymer in water, and stirring is continued until the prepolymer is completely dissolved. Under stirring, 2.5 parts of carbodiimide crosslinking agent are slowly added to the soft water-based polyurethane solution, and the stirring speed is increased to 650 rpm to dissolve the crosslinking agent and fully mix the soft water-based polyurethane solution. The adjusted soft water-based polyurethane solution is filtered through a 120-mesh filter to remove impurities and particles, and a vacuum degassing machine is used for degassing;

[0041] Step 3, preparation of the epidermis: the soft elastic PU inner layer material is loaded into different barrels of the multi-layer co-extrusion equipment respectively, and the prepared nano-enhanced wear-resistant and waterproof PU outer layer material is loaded into another barrel, and the multi-layer co-extrusion equipment is started, and the extrusion speed of each barrel is adjusted to the set value to ensure that the inner and outer layer materials can be extruded simultaneously and evenly. Through the co-extrusion die head, the inner and outer layer materials are extruded simultaneously to form a multi-layer composite structure. At this time, the thickness of the inner layer material as the core layer is controlled at 60%, and the outer layer material is wrapped on the outside of the inner layer material, and the thickness is controlled at 40%. The extruded multi-layer composite structure is guided to the molding mold and molded according to the design requirements of the football. During the molding process, the appropriate traction speed and pressure are maintained to make the multi-layer composite structure fit tightly to the mold surface. The molded multi-layer composite structure is placed in an oven and dried and cured at 70°C for 3 hours;

[0042] Step 4: Select aramid fiber with a fiber diameter of 0.4 mm and a braided structure thickness of 25% of the total thickness of the epidermis. Set the braiding size of the 3D braiding machine according to the size and shape of the epidermis, and use the 3D braiding machine to weave the fiber material. After weaving, apply polyurethane adhesive to the position where the epidermis needs to be integrated into the braided reinforcement structure, and place the braided 3D braided reinforcement structure on the inner wall of the epidermis according to the designed position. Use a pressure roller to fit the braided structure to the epidermis tightly. According to the curing time of the adhesive, wait for enough time for the braided structure to be firmly bonded to the epidermis, and place the fused epidermis in an oven at a curing temperature of 65°C for 1.5 hours.

[0043] Step 5, select a silane coupling agent, and prepare a coating solution, and select alumina as wear-resistant particles. Use ethanol to wipe the surface of the epidermis, and use a dip coating method to evenly apply the super-hydrophobic coating solution to the surface of the epidermis. The coating thickness is 10 microns. The epidermis after the coating is placed in an oven for drying and curing. The drying and curing temperature is 85°C and the curing time is 2 hours. After the curing is completed, the epidermis is taken out and allowed to cool naturally to room temperature. The wear-resistant particles are added to ethanol, and an ultrasonic disperser is used for dispersion treatment to ensure that the particles are evenly dispersed in the solvent. After the super-hydrophobic coating is dried and cured, the particle dispersion is evenly applied to the surface of the epidermis by a brushing method, and secondary drying and curing is performed. The epidermis embedded with the particles is placed in an oven again, and the secondary drying and curing time is 0.5 hours. After the curing is completed, the epidermis is taken out and allowed to cool naturally to room temperature;

[0044] Step 6. Fix the prepared skin on the printing table, apply the ink evenly on the screen, and then use a scraper to scrape the screen at a certain speed and pressure to make the ink pass through the mesh and print on the skin. According to the complexity of the pattern, perform multiple printings. After each printing, wait for the ink to dry completely before the next printing. After printing, put the skin into the drying equipment for drying to ensure that the ink is completely cured. Fix the printed skin on the workbench of the die-cutting equipment, start the die-cutting equipment, and use the die-cutting knife to cut the skin according to the shape and size on the drawing. After cutting, remove the waste on the skin to obtain the ball skin pieces that meet the requirements. Arrange the cut ball skin pieces as required and set them aside. Finally, sew to complete the production of the football.

[0045] Comparative Example 1:

[0046] Step 1: Preparation of ordinary PU outer layer material: Heat 100 parts of water-based polyurethane prepolymer (solid content of 40%) to 50°C, dissolve it in an appropriate amount of deionized water to form a uniform water-based polyurethane solution, add 3 parts of polyamine cross-linking agent, continue stirring until uniform, use ammonia water to adjust the pH value of the mixture to 8, add 0.3 parts of dibutyltin dilaurate catalyst to form an outer layer of PU, and dry and cure the prepared outer layer material at 70°C for 3 hours.

[0047] Step 2: The preparation of the soft elastic PU inner layer material is the same as that in Example 1.

[0048] Steps 3 to 6: Preparation of the epidermis, no 3D woven reinforcement structure, no super-hydrophobic coating treatment, printing and cutting. The epidermis is prepared according to step 3 in the original method (no 3D woven reinforcement structure step), and then printing and cutting are directly performed, and finally sewing is performed to complete the production of the football (no super-hydrophobic coating treatment step).

[0049] Abrasion resistance and hydrophobicity data sheet

[0050]

[0051] 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.

Claims

1. A method for manufacturing a wear-resistant and waterproof PU material football surface, characterized in that: The following steps are involved: Step 1: Preparation of nano-enhanced wear-resistant and waterproof PU outer layer material: disperse the nano-enhancer in water, add water-based polyurethane prepolymer, heat and stir evenly, add cross-linking agent and catalyst, adjust pH value, dry and solidify to obtain the outer layer material; Step 2, preparation of soft elastic PU inner layer material: dissolving soft waterborne polyurethane prepolymer at a low speed, adding a cross-linking agent, stirring at a medium speed, filtering and degassing to obtain the inner layer material; Step 3: Preparation of the skin: co-extrude the inner and outer layer materials using a multi-layer co-extrusion device, and dry and solidify; Step 4: Integrate the 3D woven reinforcement structure into the formed skin: weave the fiber material, apply adhesive, fit the woven structure to the skin, and solidify; Step 5: Treat the surface of the epidermis with a super-hydrophobic coating and embed wear-resistant particles; Step 6: Use screen printing equipment to print patterns and designs on the surface, and use die-cutting equipment to split the PU leather into surfaces of the same or different shapes.

2. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 1, characterized in that: The raw materials in step 1 include the following components in parts by weight: 100 parts of waterborne polyurethane prepolymer, 2-10 parts of nano-enhancer, 0.5-2 parts of dispersant, 1-5 parts of cross-linking agent, 0.1-0.5 parts of catalyst, appropriate amount of deionized water and appropriate amount of pH regulator.

3. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 2, characterized in that: The solid content of the waterborne polyurethane prepolymer is 30%-50%, the nano-enhancer is surface-treated nano-cellulose, and the particle size is controlled at 10-100nm, wherein the surface treatment agent is a silane coupling agent, the dispersant is a polycarboxylate dispersant, the cross-linking agent is one or more of polyamine and carbodiimide, the catalyst is dibutyltin dilaurate, and the pH adjuster is ammonia water or acetic acid.

4. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 3, characterized in that: In the step 1, the dispersion time is 10-30 minutes; the heating and stirring temperature is 40-60° C.; the stirring speed is 1000-3000 rpm, and the stirring time is 10-20 minutes; the drying temperature is 60-80° C., and the drying and curing temperature is 2-4 hours.

5. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 1, characterized in that: The raw materials in step 2 include the following components in parts by weight: 100 parts of soft water-based polyurethane prepolymer, 1.5-2.5 parts of a cross-linking agent, and an appropriate amount of deionized water.

6. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 5, characterized in that: The soft waterborne polyurethane prepolymer has a solid content of 30%-40%, and the crosslinking agent is selected from one or more of a polyol crosslinking agent and a carbodiimide crosslinking agent.

7. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 6, characterized in that: The stirring speed for dissolving the soft waterborne polyurethane prepolymer in step 2 is 200-400 rpm; the stirring speed after adding the crosslinking agent is 600-800 rpm, and the stirring time is 5-10 minutes; the filter mesh number for filtering the soft waterborne polyurethane solution is 100-200 meshes.

8. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 1, characterized in that: In step 3, the thickness of the inner layer material is set to 30%-50% of the total thickness, and the thickness of the outer layer material is correspondingly set to 50%-70%. The drying and curing temperature is 65±5° C., and the drying and curing time is 3-4 hours.

9. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 1, characterized in that: In the step 4, the fiber material is one of polyester fiber, aramid fiber and carbon fiber, and the fiber diameter is 0.1-0.5 mm; the thickness of the woven structure is 10%-30% of the total thickness of the epidermis; the curing temperature is 60-70° C., and the curing time is 1-2 hours.

10. The method for manufacturing a wear-resistant and waterproof PU material football surface according to claim 1, characterized in that: In the step 5, the super-hydrophobic coating material is one of a fluorine-containing polymer and a silane coupling agent; the wear-resistant particles are one of nano-silicon dioxide, alumina or silicon carbide, and the particle size is 10-100 nm; during the application of the super-hydrophobic coating, the coating thickness is maintained at 6-25 microns; the drying and curing temperature is 80-100° C., and the curing time is 1-2 hours; 7. The drying and curing temperature is 80-100℃, and the curing time is 0.5-1 hour.

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