Ball structure with high elasticity and high restorability

Abstract

The utility model relates to the field of sports goods, in particular to a ball structure with high elasticity and high restorability, which comprises a foaming ball center, the foaming ball center is provided with a reinforcing layer, and a plurality of patch ball surfaces are attached to the periphery of the foaming ball center. The foaming sphere center or / and the patch sphere surface can be prepared by adopting a supercritical foaming process. According to the process, the uniformity of roundness and excellent elasticity and restorability are achieved during machining, and the uniformity of the roundness is better guaranteed after external force impact.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sports goods, especially a ball structure with high elasticity and high recovery. BACKGROUND

[0002] In the prior art, the structure and material of the balls used for competition and training are various. Generally speaking, these balls are mainly prepared from polyvinyl chloride (PVC) or rubber or rubber-plastic copolymer materials. Although these materials have certain elasticity, they have many shortcomings in actual use.

[0003] For example, the existing inflatable ball is wrapped by a plurality of rubber vulcanization layers, which has the disadvantage that the ball cavity is easy to leak due to aging of the rubber, or the rubber itself is aged due to the environment after vulcanization, thereby causing the ball cavity wrapping layer to change in shape and unable to maintain the cavity in good condition and consistent roundness.

[0004] Secondly, due to the performance limitation of the material itself and the limitation of the preparation process, the service life of these balls is relatively short. In actual use, due to the lack of material protection, aging resistance and other aspects, the ball is easy to deform and the elasticity is weakened, thereby reducing the service life and increasing the cost of use and maintenance.

[0005] In addition, the manufacturing process of the traditional ball usually includes multiple complex steps, such as material preparation, molding, inflation, sealing, testing and other links. Each step needs to be accurately controlled, and the connection between the processes is close. Once a link is wrong, it may need to be done again, resulting in low overall production efficiency.

[0006] For example, the inflation link and the subsequent deflation test are indispensable parts of ball manufacturing, but these steps are relatively time-consuming. Inflation needs to ensure that the internal pressure of the ball reaches the standard, and deflation test is to verify the sealing performance of the ball, which increases the overall manufacturing time. In addition, due to the complicated preparation process and long manufacturing time, traditional ball manufacturing often needs more workers to work together to ensure the smooth operation of the production line. In the traditional ball manufacturing process, each link needs to consume energy, such as material heating, operation of molding equipment, energy consumption of inflation equipment, etc. Long-term and large-scale production will lead to a large amount of energy consumption, which is not conducive to energy saving and environmental protection.

[0007] In addition, the ball for competition and training in the prior art is generally not coated with other materials. Although this design simplifies the structure of the ball, it also affects the performance of the ball to some extent. For example, the ball without outer protection is more easily damaged by the external environment, such as ultraviolet rays, moisture, etc., thereby accelerating the aging process of the ball. Utility Model Content

[0008] To address the aforementioned issues, this invention provides a spherical structure with high elasticity and resilience. By employing a supercritical foaming process to prepare the foamed core and patch spherical surface, the unique properties of the supercritical process endow the sphere with excellent elasticity and resilience. Compared to traditional inflatable spheres, the sphere in this design can more quickly return to its original shape after being impacted by external forces, significantly improving the user experience and ensuring consistent spherical roundness.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is: a spherical structure with high elasticity and high resilience, comprising a foamed spherical core, wherein a reinforcing layer is provided around the periphery of the foamed spherical core, and a plurality of patch spherical surfaces are attached to the periphery of the reinforcing layer; the foamed spherical core and / or the patch spherical surfaces are prepared by supercritical foaming process.

[0010] As a further optimization, the foam core is at least one of polyurethane foam core, EVA foam core, TPE foam core, SBR foam core, NBR foam core, EPDM foam core, SBL foam core, POE foam core, PE foam core, TPR foam core, TPU foam core, and TPEE foam core.

[0011] As a further optimization, the diameter of the foamed core is 8cm-25cm.

[0012] As a further optimization, the reinforcing layer is made of non-woven or woven fabric, which is then bonded to the periphery of the foamed core by hot pressing or adhesive bonding.

[0013] As a further optimization, the reinforcing layer is a winding layer, which is bonded to the periphery of the foamed core by adhesive or latex.

[0014] As a further optimization, the winding layer is made of at least one of polyester-cotton yarn, pure cotton yarn, polyester yarn, and nylon yarn.

[0015] As a further optimization, the patch spherical surface includes a foamed spherical layer and a film layer that are sequentially bonded together, wherein the foamed spherical layer is bonded to the surface of the reinforcing layer, and the thickness of the foamed spherical layer is 1mm-20mm, and the thickness of the film layer is 0.1mm-5mm.

[0016] As a further optimization, the foamed spherical surface layer is made of at least one material selected from polyurethane, EVA, TPE, SBR, NBR, EPDM, SBL, POE, PE, TPR, TPU, and TPEE, and is prepared by a supercritical foaming process.

[0017] As a further optimization, the inner or outer layer of the film layer is provided with a printed layer by means of spray painting or printing or heat transfer printing or water transfer printing or cold transfer printing or pad printing.

[0018] As a further optimization, the surface of the foamed spherical layer is also provided with grooves.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. By using the supercritical foaming process to prepare the foamed spherical core and the patch spherical surface, the supercritical process is used to form the irregular fine multi-cell structure in the foaming process, thereby giving the spherical body excellent elasticity and recovery. Compared with the traditional inflatable spherical body, the foamed spherical core and the patch spherical surface prepared based on the supercritical foaming process in the present application can still maintain excellent elasticity, recovery and roundness consistency even after long-term use.

[0021] 2. The present application provides a reinforcing layer around the foamed spherical core, which not only enhances the overall stability of the spherical body, but also enables the spherical body to better disperse and resist impact force when subjected to external force, thereby ensuring the roundness consistency of the spherical body during use and effectively prolonging the service life of the spherical body. At the same time, the use of the reinforcing layer also reduces the performance degradation caused by impact, further improving the roundness consistency of the spherical body.

[0022] 3. A plurality of patch spherical surfaces are attached around the reinforcing layer, wherein the patch spherical surface comprises a foamed spherical layer and a film layer. The film layer is made of a variety of high-performance materials, such as polyurethane, TPU, PVC, etc., which has good flexibility, protection and chemical corrosion resistance, wear resistance. This design not only protects the foamed spherical layer from damage from the external environment, but also gives the spherical body better waterproof, dustproof and antifouling properties, so that the spherical body can still maintain stable performance in harsh use environment, and also can ensure that the spherical body can maintain clean spherical surface after long-term use and improve the aesthetic appearance.

[0023] 4. The present application uses supercritical foaming process to prepare the foamed spherical core and the patch spherical surface, which greatly simplifies the process compared with the manufacturing process of traditional inflatable spherical body. The supercritical foaming process can complete the foaming and molding of the material in a short time without going through complex inflation, deflation test and other links, thereby significantly improving the production efficiency, reducing energy consumption and waste. Moreover, the simplification of the manufacturing process and the shortening of the manufacturing time directly lead to the reduction of the required workers, and the supercritical foaming process with higher automation degree can reduce the dependence on manual operation, thereby reducing the labor cost and improving the stability and reliability of the production line.

[0024] 5. The ball prepared by the scheme has fixity (quantitative data), which means that the size, shape, performance and other parameters of the ball can be accurately controlled, which is more in line with the requirements of automatic process, so that the whole production process is more smooth and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a cross-sectional structure diagram of a ball structure.

[0026] Figure 2 is an embodiment diagram using one of the patch spherical surfaces.

[0027] Figure 3 is an embodiment diagram using another patch spherical surface.

[0028] Figure 4 is a diagram of a ball structure as a rugby ball structure.

[0029] BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION

[0030] Please refer to Figure 1 The utility model discloses a ball structure with high elasticity and high recovery, which comprises a foamed ball core 1, wherein the foamed ball core 1 is provided with a reinforcing layer 2 on the periphery, and the periphery of the reinforcing layer 2 is attached to a plurality of patch spherical surfaces 3; wherein the foamed ball core 1 or / and the patch spherical surface 3 are prepared by using a supercritical foaming process.

[0031] The foamed ball core 1, as the internal core component of the ball structure, is prepared by using a supercritical foaming process. During the foaming process, the temperature and pressure conditions are accurately controlled, so that a large number of irregular small bubble pore structures are formed inside the material. These bubble pore structures endow the foamed ball core with excellent elastic properties, so that the ball core can quickly recover to the original shape after being impacted by external force, providing excellent use experience and effect. It is worth noting that although the foamed ball core 1 has the word "ball core" in its name, it is not limited to the traditional ball structure. According to the specific design requirements and application scenarios, the foamed ball core 1 can be designed into various irregular shapes to adapt to different ball sports and performance requirements. This flexibility enables the ball core to better match the external structure, ensuring the stability and consistency of the entire ball.

[0032] And in the embodiment, the aforementioned foamed sphere core 1 is an EVA foamed sphere core 1, a TPE foamed sphere core 1, an SBR foamed sphere core 1, an NBR foamed sphere core 1, an EPDM foamed sphere core 1, an SBL foamed sphere core 1, a POE foamed sphere core 1, a PE foamed sphere core 1 or a TPR foamed sphere core 1, a TPU foamed sphere core 1, a TPEE foamed sphere core 1, a polyurethane foamed sphere core 1.

[0033] The following list focuses on the characteristics of different materials:

[0034] TPU (thermoplastic polyurethane elastomer), which is characterized by wear resistance, oil resistance, low temperature resistance, excellent resilience, and strong durability.

[0035] TPEE (thermoplastic polyester elastomer), which is characterized by being an upgraded version of TPU, similar to TPU in terms of resilience and durability, but with significant improvements in lightweight. It is suitable for the production of sports balls that require high lightness.

[0036] EVA (ethylene-vinyl acetate copolymer), which is characterized by good elasticity and flexibility after foaming, although its durability is relatively ordinary. It is also suitable for the production of sports balls that have certain cost requirements.

[0037] In this specific embodiment, polyurethane / TPU / TPEE materials are preferred for supercritical foaming process.

[0038] Further discussion, the reinforcing layer 2 is a non-woven fabric or woven fabric, which is hot-pressed or glued to the periphery of the foamed sphere core 1. The woven fabric uses 20 or 30 or 40 yarns.

[0039] In this specific embodiment, the foamed sphere core 1 is provided with a reinforcing layer 2, which not only enhances the overall stability of the ball, but also allows the ball to better disperse and resist impact force when subjected to external force, thereby effectively prolonging the service life of the ball and ensuring the consistency of the ball during use. At the same time, the use of the reinforcing layer 2 also reduces the performance decline caused by impact, further improving the consistency of the roundness of the ball.

[0040] As another embodiment, the reinforcing layer 2 can be selected as a winding layer, which is provided with adhesive or latex, and the patch sphere 3 is bonded to the winding layer by the adhesive or latex. The further limited technical solution of the utility model is that the winding layer is made of polyester cotton yarn, pure cotton yarn, polyester yarn or nylon yarn.

[0041] Specific analysis: The winding layer is formed by winding yarns, which can form a tight and strong structure around the foamed sphere core 1. This structure not only enhances the overall stability of the sphere, but also enables the sphere to better disperse and resist impact forces when subjected to external forces, thereby prolonging the service life of the sphere. The polyester cotton yarn, pure cotton yarn, polyester yarn or nylon yarn and other materials used in the winding layer have high strength and protection. The selection of these materials makes the winding layer itself have excellent durability and can maintain stable performance in long-term use and frequent friction. The winding layer is provided with glue or latex, which can firmly adhere the patch sphere 3 to the winding layer. This adhesive combination not only improves the bonding force between the patch sphere 3 and the reinforcing layer 2, but also enables the sphere to better maintain the integrity of the overall structure when subjected to external forces. Moreover, the winding layer reinforcing layer 2 has great flexibility and can adapt to the needs of different material combinations. For example, different materials and specifications of yarns can be selected to make the winding layer to meet the requirements of different sports scenes and athletes for the performance of the sphere.

[0042] Further discussion, in this specific embodiment, a single patch sphere 3 includes a foamed spherical layer 3A and a film layer 3B connected in turn; wherein the foamed spherical layer 3A is attached to the surface of the reinforcing layer 2. Moreover, the foamed spherical layer 3A is prepared by a supercritical foaming process.

[0043] Specific analysis: The foamed spherical layer 3A is prepared by a supercritical foaming process. This process utilizes the special properties of supercritical processes (such as carbon dioxide or nitrogen) at specific temperatures and pressures, allowing materials to form irregular small multi-cell structures during the foaming process. This structure endows the foamed spherical layer 3A with excellent elasticity, light weight and protection. In this specific embodiment, the foamed spherical layer 3A can be prepared from a variety of materials, such as at least one of EVA, TPE, SBR, NBR, EPDM, SBL, POE, PE, TPR, etc. These materials each have their own characteristics and can be selected according to the use requirements and performance requirements of the sphere. For example, polyurethane and TPU materials have excellent elasticity, recovery and low-temperature impact strength, and are suitable for making high-end sports spheres. At the same time, the foamed spherical layer 3A is tightly attached to the surface of the reinforcing layer 2, forming the outer structure of the sphere. This attachment not only enhances the structural stability of the sphere, but also enables the sphere to better disperse and resist impact forces when subjected to external forces.

[0044] In addition, the film layer 3B can be made of TPU, PVC, PU, TPE, TPR, PET, EVA, etc. These materials have good flexibility, protection and chemical corrosion resistance, which can protect the foamed spherical surface layer 3A from the damage of the external environment. The film layer 3B not only improves the durability of the sphere, but also gives the sphere better waterproof, dustproof and antifouling performance. This makes the sphere still maintain stable performance in humid or harsh use environment. At the same time, as the outer layer of the patch spherical surface 3, the film layer 3B can be made into a printing layer on its surface by techniques such as paint spraying, printing, heat transfer printing, water transfer printing, cold transfer printing and pad printing, which can carry rich visual elements such as patterns, logos and brand logos, thereby improving the appearance and individuality of the sphere.

[0045] Referring to Figures 2-3 Moreover, the single patch spherical surface 3 can be designed as a regular hexagon or a regular pentagon or other polygon or irregular shape, and by selecting a plurality of patch spherical surfaces 3 to be attached to the reinforcing layer 2, a compact spherical surface is formed, i.e. a sphere with different patterns is formed. This design not only improves the appearance of the sphere, but also enhances the structural stability and durability of the sphere. At the same time, the shape of the patch spherical surface can also be customized according to customer needs (see Figures 2-3 ).

[0046] The following is the specific manufacturing process:

[0047] Step 1, material preparation:

[0048] Foamed ball core 1: material: TPU foaming material, using supercritical foaming process to ensure that the foamed ball core 1 has high elasticity, low temperature resistance and excellent elasticity and recovery.

[0049] Reinforcing layer 2: winding layer, material: polyester cotton yarn, diameter: 1mm, winding method: spiral winding, using adhesive as adhesive to tightly combine the winding layer with the foamed ball core 1.

[0050] Foamed spherical surface layer 3A: material: TPU foaming material; thickness: 3mm; size: matched with the reinforcing layer 2 to ensure complete coverage, using supercritical foaming process to give the patch spherical surface 3 light weight and good elasticity.

[0051] Film layer 3B: material: TPU film; thickness: 0.1mm; size: slightly larger than the foamed spherical surface layer 3A, with 2mm margin reserved for adhesion.

[0052] Printing layer: printing patterns, logos or brand logos on the film layer 3B by heat transfer printing technology.

[0053] Step 2, Preparation of Foamed Core 1: Place the TPU material into the supercritical foaming equipment and follow the existing supercritical foaming process parameters (as the supercritical foaming process is a prior art process, its process parameters and process flow will not be discussed here, please refer to CN20241103A408.5 or CN202410925729.3, etc.). Foaming is carried out to prepare the foamed core 1.

[0054] Step 3, Use the winding layer as the reinforcing layer 2, then according to the winding process parameters described above, wind the polyester cotton yarn around the foamed core 1, and use latex as the adhesive to fix it.

[0055] Step 4, Place the TPU material into the supercritical foaming equipment and follow the conventional supercritical foaming process parameters to prepare the foamed spherical layer 3A. Cut the TPU film to a size slightly larger than the foamed spherical layer 3A, leaving a 2mm margin. The film layer 3B is tightly combined with the foamed spherical layer 3A through hot pressing process to form the final patch spherical surface 3.

[0056] Step 5, Hot pressing (hot pressing temperature: 150°C, hot pressing pressure: 5MPa, hot pressing time: 30 seconds, cooling time: 10 seconds) of the patch spherical surface 3 and the winding layer to ensure tight adhesion, then form a complete spherical structure.

[0057] Step 6, Form grooves on the surface of the foamed spherical layer 3A through hot pressing or other methods. The surface of the foamed spherical layer 3A can be designed with grooves according to actual needs. These grooves are designed ingeniously and have multiple functions: on the one hand, they can significantly reduce the friction of the ball during rolling or movement, making the ball smoother and improving the performance; on the other hand, the grooves also facilitate drainage, especially in wet or rainy environments, effectively preventing water accumulation from affecting the controllability and performance of the ball. In addition, the presence of grooves also increases the grip of the ball, improving the stability and accuracy of the user in actions such as catching and passing the ball. Therefore, the groove design on the surface of the foamed spherical layer 3A not only improves the practicality of the ball, but also brings a better experience to ball games.

[0058] Ball consistency performance test:

[0059] I. Experimental purpose

[0060] The purpose of this experiment is to verify the difference in roundness consistency between the ball using reinforcing layer and supercritical foaming technology (experimental group) and the traditional inflatable ball (control group) after a certain use (such as impact, compression, etc.). By measuring and comparing the change in roundness before and after use, the performance of the two types of balls in maintaining shape stability is evaluated.

[0061] II. Experimental materials

[0062] Experimental group samples: 3 spheres with traditional framework structure and supercritical patch technology, diameter about 15 cm, numbered A1, A2, A3.

[0063] Control group samples: 3 traditional inflatable spheres, diameter about 15 cm, numbered B1, B2, B3.

[0064] III. Test equipment and tools

[0065] Durable test machine (can simulate the impact, extrusion and other situations of the sphere in actual use) and roundness measuring instrument (precision 0.01 mm)

[0066] IV. Experimental steps

[0067] Pre-treatment and initial measurement:

[0068] Place all spheres at room temperature for 24 hours to eliminate the influence of temperature difference on experimental results. Use the roundness measuring instrument to measure multiple evenly distributed points on each sphere and record the initial roundness data (i.e. the distance from the sphere surface to the center). Use simulation test: place the experimental group and control group spheres in the durability test machine, set the impact frequency, force and test time, simulate the impact, extrusion and other situations of the sphere in actual use. The test time can be set according to the standard requirements, such as 4 hours, to ensure that the sphere experiences enough use simulation. Post-use measurement: after the test, take out all the spheres and use the roundness measuring instrument again to measure the same measurement points on each sphere, record the roundness data after use. Data recording and analysis: calculate the roundness change of each sphere before and after use (i.e. the difference between the roundness data after use and the initial roundness). Analyze and compare the performance difference of the experimental group and the control group in roundness consistency.

[0069] V. Experimental data output

[0070]

[0071] Initial roundness data (unit: mm):

[0072] Roundness data after use:

[0073]

[0074] According to the experimental data, it can be concluded that the spheres using traditional framework structure and supercritical patch technology (experimental group) have better consistency in roundness retention after use simulation than traditional inflatable spheres (control group). The roundness change of the experimental group spheres is smaller, indicating that they can better maintain shape stability under impact, extrusion and other use conditions. This proves the effectiveness of the supercritical patch technology in improving the consistency of sphere roundness retention.

[0075] Rebound Test Experiment:

[0076] I. Purpose of Experiment

[0077] The purpose of this experiment is to verify whether the rebound force of the ball structure prepared using supercritical technology (hereinafter referred to as "experimental ball") is better than that of the same size of basketball or football on the market (hereinafter referred to as "control ball").

[0078] II. Materials and Equipment

[0079] 2.1 Experimental Materials

[0080] Experimental group: Use the supercritical process ball structure prepared in Example 1, the diameter is 20.5 cm, the foamed ball core 2 material is TPU foamed material, the surface patch layer 4 material is also TPU foamed material, the reinforcing layer 3 is a polyester cotton yarn winding layer, and the film layer 5 is a TPU film.

[0081] Control group: Randomly selected on the market with the same size (20.5 cm) of inflatable football, the material may be polyvinyl chloride (PVC) or other rubber or plastic and rubber copolymer materials.

[0082] 2.2 Experimental Equipment

[0083] High-precision rebound tester: used to accurately measure the rebound height of the ball.

[0084] III. Experimental Steps

[0085] Preparation stage:

[0086] Ensure that the experimental group and control group products are all new and unused.

[0087] Use a height measuring ruler to mark the height of 2.00 meters at the release point of each ball.

[0088] Test stage:

[0089] For each ball, release it from the marked release point, let it fall freely and rebound.

[0090] Use the rebound tester to measure the rebound height when the ball rebounds to the highest point.

[0091] Repeat this process 10 times to obtain stable experimental data.

[0092] Data recording and processing:

[0093] Record the rebound height of each test, and calculate the average rebound height and rebound rate (average rebound height / release height x 100%). Analyze the data statistically to verify whether the difference between the two groups of data is significant.

[0094] IV. Experimental data

[0095]

[0096]

[0097] V. Data analysis

[0098] From the experimental group bounce detection report and the control group bounce detection report, it can be seen that the average rebound height of the experimental ball is 1305MM, and the average rebound rate is 65.25%; while the average rebound height of the control ball is 1179MM, and the average rebound rate is 58.95%, which can verify that the rebound force of the experimental ball is significantly better than that of the control group ball.

[0099] VI. Conclusion

[0100] This experiment verifies that the ball structure prepared by supercritical process is significantly better than the common football on the market in terms of rebound force. The experimental data shows that the average rebound rate and rebound height of the experimental ball are higher than those of the control ball, and the difference is significant.

[0101] Reference Figure 4 , and another group of experiments: rugby ball consistency retention test

[0102] I. Experimental purpose

[0103] The purpose of this experiment is to test the rugby ball (experimental group) prepared by supercritical foaming technology after normal impact, extrusion and other forces, its external form (i.e. the consistency of the ball) retention ability, to ensure that the ball after being subjected to external force, compared with the control group (traditional rugby ball), its surface will not appear obvious convex or concave, keep good ball shape consistency.

[0104] II. Experimental materials

[0105] Experimental group samples: 3 rugby balls prepared by supercritical foaming technology (prepared by the process of embodiment 1), diameter and shape meet the standard of rugby ball, numbered A1, A2, A3.

[0106] Control group samples: 3 rugby balls made by traditional process, diameter and shape are the same as the experimental group, numbered B1, B2, B3.

[0107] Test equipment:

[0108] Impact testing machine: can simulate the impact force and frequency of rugby ball in actual game.

[0109] Extrusion testing machine: used to simulate the stress condition of rugby ball when subjected to extrusion.

[0110] Roundness measuring instrument: A high-precision measuring instrument used to measure the roundness and surface morphology changes of a rugby ball before and after use.

[0111] III. Experimental Steps

[0112] Pre-treatment: Place all rugby balls at room temperature for 24 hours to eliminate the influence of temperature differences on experimental results. Perform initial measurements on each rugby ball using the roundness measuring instrument, and record the initial roundness and surface morphology data.

[0113] Impact test: Place the experimental group and control group rugby balls in the impact testing machine, set the impact force and frequency that match the actual situation of rugby games. Perform a certain number of impact tests to ensure that each rugby ball is subjected to sufficient impact.

[0114] Compression test: Transfer the rugby balls after the impact test to the compression testing machine to simulate the stress situation when the rugby ball is subjected to compression. Perform a certain number of compression tests, and record the force and duration of each compression.

[0115] Post-use measurement: Use the roundness measuring instrument to measure each rugby ball after use, focusing on changes in its roundness and surface morphology. Record the measurement data of each rugby ball and compare it with the initial data.

[0116] Data analysis: Calculate the roundness change and surface morphology change of each rugby ball before and after use.

[0117] Statistical analysis of the data of the experimental group and the control group, comparing the differences in the consistency of the two groups of rugby balls.

[0118] IV. Experimental Data Output

[0119]

[0120] V. Experimental Conclusion

[0121] Based on the above experimental data, it can be concluded that the rugby ball made by supercritical foaming technology (experimental group) has a significantly better ability to maintain its external shape (ball consistency) after being subjected to normal impact, compression, and other forces than the rugby ball made by traditional technology (control group). The roundness change of the experimental group rugby ball is smaller, and the surface morphology does not show obvious protrusions or depressions, indicating that it can better maintain the consistency of the ball shape after being subjected to external forces. The control group rugby ball has different degrees of roundness change and surface morphology change, indicating that it has deficiencies in maintaining the consistency of the ball. Therefore, the rugby ball made by supercritical patch technology has significant advantages in improving the consistency and durability of the ball.

[0122] The above embodiments only describe the preferred embodiments of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary engineering technicians in the art without departing from the design spirit of the utility model shall fall within the protection scope determined by the claims of the utility model.

Claims

1. A ball structure having high elasticity and high recovery, characterized by: The foamed sphere core is provided with a reinforcing layer on the periphery of the foamed sphere core, and the periphery of the reinforcing layer is attached with a plurality of patch spheres.

2. The ball structure with high elasticity and high recovery according to claim 1, characterized in that: The diameter of the foamed sphere core is 8cm-25cm.

3. The ball structure with high elasticity and high recovery according to claim 1, characterized in that: The reinforcing layer is a non-woven fabric or a woven fabric, which is attached to the periphery of the foamed sphere core by hot pressing or gluing.

4. The ball structure with high elasticity and high recovery according to claim 1, characterized in that: The reinforcing layer is a wire winding layer, which is glued to the periphery of the foamed sphere core.

5. The ball structure with high elasticity and high recovery according to claim 4, characterized in that: The wire winding layer is made of at least one of polyester cotton yarn, pure cotton yarn, polyester yarn and nylon yarn.

6. The ball structure with high elasticity and high recovery according to claim 1, characterized in that: The patch sphere includes a foamed sphere layer and a film layer attached in sequence, wherein the foamed sphere layer is attached to the surface of the reinforcing layer, the thickness of the foamed sphere layer is 1mm-20mm, and the thickness of the film layer is 0.1mm-5mm.

7. The ball structure with high elasticity and high recovery according to claim 6, characterized in that: The inner layer or the outer layer of the film layer is provided with a printing layer by spraying paint, printing, hot transfer printing, water transfer printing, cold transfer printing or pad printing.

8. The ball structure with high elasticity and high recovery according to claim 7, characterized in that: The surface of the foamed sphere layer is also provided with grooves.

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