Novel pétanque racket

Abstract

The present application relates to a new type of pickleball racket, belonging to the technical field of pickleball racket; the new type of pickleball racket comprises a foam core layer and a racket body shell; the foam core layer is obtained by heating and foaming of foaming material; the racket body shell is integrally formed by injection molding process of mixed raw materials composed of bio-based filler and plastic; silane coupling agent, functional additive and heat-resistant modifier are also added in the mixed raw materials; in the present application, coffee grounds, shell powder, coconut fibers or straw are used as bio-based fillers in the preparation of the racket body shell, partially replacing traditional petroleum-based plastics. Not only the high-value utilization of waste is realized, and the pressure on the environment is reduced, but also the carbon emission of the product is reduced from the source of raw materials. Through a specific surface modification process, these bio-based fillers and the matrix resin form a stable combination, ensuring the reliability of the material performance.

Description

Technical Field

[0001] This invention belongs to the field of Peak racket technology, specifically, it relates to a novel Peak racket. Background Technology

[0002] As the core equipment for peakball, the performance of the Peak racket depends on its racket structure design and material system. This is achieved by balancing feel, power transfer, and ease of use.

[0003] With increasing global emphasis on sustainable development and environmental protection, the sports equipment industry is also showing a trend towards green and low-carbon development. Traditional Peak racket shells rely entirely on petroleum-based plastics (such as PA and PP), which not only consumes non-renewable fossil resources but also results in high carbon emissions during their production and disposal. Therefore, developing a new type of Peak racket that maintains or even improves performance while effectively utilizing renewable resources, reducing dependence on petroleum-based materials, and lowering the product's carbon footprint has become an important development direction in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a novel Peak racket to solve the problems mentioned in the background section.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] The new Peak racket includes a foam core and a racket shell; The foam core layer is obtained by heating and foaming a foaming material; The outer shell of the racket is injection molded from a mixture of bio-based fillers and plastic. The mixed raw materials also include a silane coupling agent, functional additives, and a heat-resistant modifier; the heat-resistant modifier is obtained by a cyclocondensation reaction between a trifluoromethyl-containing o-aminobenzaldehyde derivative and a cyanoacetamide; the reaction equation is as follows: .

[0007] As a further technical solution of the present invention: the mass ratio of bio-based filler to plastic is 30-50:100.

[0008] As a further technical solution of the present invention: the bio-based filler includes coffee grounds, shell powder, coconut shreds or wheat straw.

[0009] As a further technical solution of the present invention: the plastic is one or more of PP, ABS, PC, and PA.

[0010] As a further technical solution of the present invention: the mass ratio of the mixed raw materials, silane coupling agent, functional additives and heat-resistant modifier is 130-150:2-4:2-4:1.6-2.8.

[0011] As a further technical solution of the present invention: the silane coupling agent is at least one of 3-chloropropyltriethoxysilane and 3-chloropropyltrimethoxysilane.

[0012] As a further technical solution of the present invention: the functional additive is at least one of antioxidants and ultraviolet absorbers.

[0013] As a further technical solution of the present invention: the trifluoromethyl-containing o-aminobenzaldehyde derivative is at least one of 2-amino-5-trifluoromethylbenzaldehyde and 2-amino-4-trifluoromethylbenzaldehyde.

[0014] As a further technical solution of the present invention: the manufacturing process of the racket body shell includes: Chloropropylated shell powder was obtained by loading a silane coupling agent onto the surface of shell powder. Modified shell powder is obtained by reacting chloropropylated shell powder with a heat-resistant modifier using a quaternary ammonium salt reaction. Modified shell powder, PA, and functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the tamper through an injection molding process.

[0015] As a further technical solution of the present invention, the injection molding process parameters are: barrel temperature 230-265℃, mold temperature 80-100℃, injection pressure 90-130MPa, holding pressure 40-80MPa, holding time 3-8 seconds, and cooling time 15-30 seconds.

[0016] In summary, the present invention has at least the following beneficial effects: 1) This invention prepares a heat-resistant modifier with trifluoromethyl, quinoline, amino, and amide structures, and grafts this heat-resistant modifier onto the surface of chloromethylated shell powder. The amino and amide groups on the surface of the modified shell powder can form stable chemical bonds and strong hydrogen bonds with the carboxyl groups at the end of nylon 6, achieving a strong chemical interface bond between "shell powder-coupling agent-heat resistant agent-nylon matrix". This effectively improves the compatibility between the modified shell powder and the nylon 6 matrix and improves the overall stress transmission inside the composite material. It significantly improves the overall rigidity, toughness, and creep resistance of the racket shell and alleviates the problem of increased brittleness caused by the addition of solid fillers. 2) The modified shell powder of the present invention is grafted with a quinoline ring with extremely high rigidity and a trifluoromethyl structure with strong electron withdrawal. The quinoline ring can effectively restrict the movement of nylon molecular chains and enhance the rigidity at the nodes of the molecular chains. The trifluoromethyl structure, as a strong electron-withdrawing group, can generate a strong "inductive effect" to enhance the interaction force between molecular chains and further improve the rigidity and stability at the nodes of the molecular chains. The synergistic effect of the two ultimately leads to a significant increase in the glass transition temperature of the nylon-based composite material, effectively solving the softening problem that may occur in the injection molding process. 3) This invention uses coffee grounds, shell powder, and other bio-based fillers in the preparation of the racket shell, partially replacing traditional petroleum-based plastics. These fillers are derived from renewable resources, which not only achieves high-value utilization of waste and reduces environmental pressure, but also reduces the carbon emissions of the product from the source of raw materials. Through a specific surface modification process, these bio-based fillers form a stable bond with the matrix resin, ensuring the reliability of material performance, and ultimately producing a new type of Peak racket that is high-performance, lightweight, and environmentally friendly, in line with the industrial policy orientation of green manufacturing and sustainable development; that is, the purpose of the bio-based racket prepared by this invention is mainly to replace petroleum-based materials, use renewable resources, and reduce carbon emissions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a novel Peak racket provided by the present invention; Figure 2 This is a schematic diagram of the exploded structure of a novel Peak racket provided by the present invention.

[0018] 1. Foam core layer; 2. Outer shell of racket body; 21. First shell; 22. Second shell; 3. Racket face; 4. Handle; 5. Glove. Detailed Implementation

[0019] This invention provides a novel Peak racket, which can be implemented by those skilled in the art with appropriate modifications to the process parameters, based on the content of this document. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and fall within the scope of protection of this invention. The methods and applications of this invention have been described through preferred embodiments, and those skilled in the art can clearly modify or appropriately alter and combine the methods and applications described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0020] It should be understood that the expression “one or more of…” individually includes each of the objects described after the expression, as well as various different combinations of two or more of the described objects, unless otherwise understood from the context and usage. The expression “and / or” combined with three or more described objects should be understood to have the same meaning, unless otherwise understood from the context.

[0021] The terms “including,” “having,” or “containing,” including the use of their grammatical synonyms, should generally be understood as open-ended and non-restrictive, for example, not excluding other unstated elements or steps, unless otherwise specifically stated or understood from the context.

[0022] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural.

[0023] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items.

[0024] It should be understood that the order of the steps or the order in which certain actions are performed is not important as long as the invention remains operational. Furthermore, two or more steps or actions can be performed simultaneously.

[0025] The use of any and all instances or exemplary language such as “e.g.” or “including” in this document is merely intended to better illustrate the invention and is not intended to limit the scope of the invention unless the claims are made. No language in this specification should be construed as indicating that any unclaimed element is essential to the practice of the invention.

[0026] Furthermore, the numerical ranges and parameters used to define the present invention are approximate values, and the relevant values ​​in the specific embodiments have been presented as precisely as possible. However, any value inevitably contains standard deviations due to individual test methods. Therefore, unless explicitly stated otherwise, it should be understood that all ranges, quantities, values, and percentages used in this disclosure are modified with the word "approximately". Here, "approximately" generally means that the actual value is within plus or minus 10%, 5%, 1%, or 0.5% of a specific value or range.

[0027] It should be understood that in the various embodiments of this application, the order of the above processes does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0028] The embodiments and comparative examples of this invention describe some examples, in which the embodiments illustrate certain implementations of the invention. However, this does not mean that the effects of the invention can only be achieved in these examples.

[0029] Nylon 6 resin possesses excellent processability and mechanical properties, good chemical stability, is safe and non-toxic, and has a low raw material cost, making it an ideal hollow shell material. However, nylon 6 resin has a low glass transition temperature, while commonly used foaming materials (such as foamed polypropylene and foamed polystyrene) typically require foaming at higher temperatures, far exceeding the glass transition temperature of nylon 6. This causes the formed shell to easily soften, deform, or even collapse during the core layer foaming process, resulting in low product yield. Lowering the foaming temperature to accommodate the shell's heat resistance leads to insufficient core layer foaming, uneven density, and reduced racket elasticity. To address these technical shortcomings, this invention provides a novel Peak racket.

[0030] To further illustrate the present invention, the novel Peak racket provided by the present invention will be described in detail below with reference to embodiments.

[0031] Example 1 The new Peak racket comprises a foam core layer 1, a racket shell 2, and a handle 4. The foam core layer effectively absorbs the impact of the Peak ball hitting the racket surface, while providing a better hitting feel and reducing the overall weight of the Peak racket. The racket shell 2, located on the surface of the foam core layer 1, not only protects the foam core layer 1 but also gives the racket greater elasticity, which is beneficial for returning the Peak ball.

[0032] The racket shell 2 includes a first shell 21 and a second shell 22, which are respectively disposed on both sides of the foam core layer 1. The surface of the racket shell 2 has a custom pattern formed by laser engraving. The custom pattern allows for personalized design of the Peak racket. At the same time, the pattern design is carried out by laser engraving, which eliminates the need for spraying, dyeing and other processes on the racket shell 2. This helps to shorten the overall production cycle of the Peak racket and also facilitates the green recycling of the racket shell 2.

[0033] In fact, the Peak racket can be divided into a racket face 3 and a handle 4 based on the region. The racket face 3 is formed on the surface of both the first shell 21 and the second shell 22. The racket face 3 is used to contact and return the Peak ball, while the handle 4 is used by the athlete to hold the racket. In some embodiments, the handle 4 can be covered with a TPE grip glove 5. The TPE grip glove 5 helps to effectively improve the athlete's grip comfort and increase friction.

[0034] In this embodiment, the foam core layer 1 is obtained by heating and foaming expanded polystyrene; and the outer shell 2 of the racket body is integrally molded by injection molding of nylon-based composite material, wherein the nylon-based composite material contains the following raw materials in parts by weight: 100 parts of nylon 6 resin, 30 parts of shell powder, 2 parts of 3-chloropropyltrimethoxysilane, 2 parts of functional additives, and 1.6 parts of heat-resistant modifier.

[0035] The functional additive is antioxidant 1010, and the heat-resistant modifier is prepared by the following steps: By mass fraction, 1.89 parts by mass of 2-amino-4-trifluoromethylbenzaldehyde, 1.18 parts by mass of cyanoacetamide, 0.96 parts by mass of sodium ethoxide, and 45 parts by mass of anhydrous ethanol were mixed in a reaction vessel and reacted at 90°C for 60 min. After the reaction was completed, the reaction solution was poured into deionized water to precipitate. After filtering and separating the precipitate, the precipitate was recrystallized with anhydrous ethanol to obtain the heat-resistant modifier.

[0036] Furthermore, the novel Peak racket is manufactured by the following steps: S1. By mass fraction, 2 parts of 3-chloropropyltrimethoxysilane, 32 parts of shell powder, and 160 parts of 80% ethanol aqueous solution were mixed in a reaction vessel and reacted at 40°C for 8 hours. After the reaction was completed, the solid was separated by filtration and the obtained solid was washed with deionized water and dried to obtain chloropropylated shell powder. S2. By mass, 32.62 parts by mass of chloropropylated shell powder, 1.6 parts by mass of heat-resistant modifier, and anhydrous ethanol are mixed in a reaction vessel and reacted at 60°C for 24 hours. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain modified shell powder. S3. By mass, mix 30 parts modified shell powder, 100 parts nylon 6, and 2 parts functional additives, melt them in an injection molding machine, and then mold them into the shell of the paddle body through injection molding. The injection molding process parameters are: barrel temperature 230℃, mold temperature 80℃, injection pressure 90MPa, holding pressure 40MPa, holding time 3 seconds, and cooling time 15 seconds. S4. Add the foaming material into the racket body mold and foam it for 15 minutes at a temperature of 90℃ to obtain the foam core layer. Then, use a sealing screw plug to seal the hollow cavity shell to obtain the new Peak racket.

[0037] Example 2 In this embodiment, the foam core layer 1 is obtained by heating and foaming expanded polystyrene; and the outer shell 2 of the racket body is integrally molded by injection molding of nylon-based composite material, wherein the nylon-based composite material contains the following raw materials in parts by weight: 100 parts of nylon 6 resin, 40 parts of shell powder, 3 parts of 3-chloropropyltriethoxysilane, 3 parts of functional additives, and 2.2 parts of heat-resistant modifier.

[0038] The functional additive is composed of 2 parts by weight of antioxidant 1010 and 1 part by weight of ultraviolet absorber UV-327, and the heat-resistant modifier is prepared by the following steps: By mass fraction, 1.89 parts by mass of 2-amino-5-trifluoromethylbenzaldehyde, 1.26 parts by mass of cyanoacetamide, 1.2 parts by mass of sodium ethoxide, and 45 parts by mass of anhydrous ethanol were mixed in a reaction vessel and reacted at 85°C for 45 min. After the reaction was completed, the reaction solution was poured into deionized water to precipitate. After filtering and separating the precipitate, the precipitate was recrystallized with anhydrous ethanol to obtain the heat-resistant modifier.

[0039] Furthermore, the novel Peak racket is manufactured by the following steps: S1. By mass fraction, 3 parts by mass of 3-chloropropyltriethoxysilane, 40 parts by mass of shell powder, and 200 parts by mass of 70% ethanol aqueous solution are mixed in a reaction vessel and reacted at 50°C for 5.5 h. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain chloropropylated shell powder. S2. By mass, 80.88 parts by mass of chloropropylated shell powder, 2.2 parts by mass of heat-resistant modifier, and anhydrous ethanol are mixed in a reaction vessel and reacted at 70°C for 18 hours. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain modified shell powder. S3. By mass, 40 parts of modified shell powder, 100 parts of nylon 6, and 3 parts of functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the paddle body through injection molding. The injection molding process parameters are: barrel temperature 245℃, mold temperature 90℃, injection pressure 110MPa, holding pressure 60MPa, holding time 6 seconds, and cooling time 25 seconds. S4. Add the foaming material into the racket body mold and foam it at 95℃ for 11.5 minutes to obtain the foam core layer. Then, use a sealing screw plug to seal the hollow cavity shell to obtain the new Peak racket.

[0040] Example 3 In this embodiment, the foam core layer 1 is obtained by heating and foaming expanded polystyrene; and the outer shell 2 of the racket body is integrally molded by injection molding of nylon-based composite material, wherein the nylon-based composite material contains the following raw materials in parts by weight: 100 parts of nylon 6 resin, 50 parts of shell powder, 4 parts of 3-chloropropyltriethoxysilane, 4 parts of functional additives, and 2.8 parts of heat-resistant modifier.

[0041] The functional additive is composed of 3 parts by weight of antioxidant 1076 and 1.5 parts by weight of ultraviolet absorber UV-326, and the heat-resistant modifier is prepared by the following steps: By mass fraction, 1.89 parts by mass of 2-amino-4-trifluoromethylbenzaldehyde, 1.34 parts by mass of cyanoacetamide, 1.44 parts by mass of sodium ethoxide, and 45 parts by mass of anhydrous ethanol were mixed in a reaction vessel and reacted at 80°C for 30 minutes. After the reaction was completed, the reaction solution was poured into deionized water to precipitate. After filtering and separating the precipitate, the precipitate was recrystallized with anhydrous ethanol to obtain the heat-resistant modifier.

[0042] Furthermore, the novel Peak racket is manufactured by the following steps: S1. By mass fraction, 4 parts of 3-chloropropyltriethoxysilane, 50 parts of shell powder, and 240 parts of 60% ethanol aqueous solution are mixed in a reaction vessel and reacted at 60°C for 3 hours. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain chloropropylated shell powder. S2. By mass, 48.98 parts by mass of chloropropylated shell powder, 2.8 parts by mass of heat-resistant modifier, and anhydrous ethanol are mixed in a reaction vessel and reacted at 80°C for 12 hours. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain modified shell powder. S3. By mass, 50 parts of modified shell powder and 100 parts of nylon 6 and 4 functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the paddle body through injection molding. The injection molding process parameters are: barrel temperature 265℃, mold temperature 100℃, injection pressure 130MPa, holding pressure 80MPa, holding time 8 seconds, and cooling time 30 seconds. S4. Add the foaming material into the racket body mold and foam it for 8 minutes at 100℃ to obtain the foam core layer. Then, use the sealing screw plug to seal the hollow cavity shell to obtain the new Peak racket.

[0043] Comparative Example 1 The difference between this comparative example and Example 3 is that no additional heat-resistant modifier was prepared, and the shell powder was not modified.

[0044] In this embodiment, the foam core layer 1 is obtained by heating and foaming expanded polystyrene; and the outer shell 2 of the racket body is integrally molded by injection molding of nylon-based composite material, wherein the nylon-based composite material contains the following parts by weight of raw materials: 100 parts of nylon 6 resin, 50 parts of shell powder, and 4 parts of functional additives.

[0045] The functional additive is composed of 1.5 parts by weight of antioxidant 1076 and 0.5 parts by weight of ultraviolet absorber UV-326.

[0046] Furthermore, the novel Peak racket is manufactured by the following steps: S1. By mass, 24 parts of modified shell powder and 100 parts of nylon 6 and 2 functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the paddle body through injection molding. The injection molding process parameters are: barrel temperature 230℃, mold temperature 80℃, injection pressure 90MPa, holding pressure 40MPa, holding time 3 seconds, and cooling time 15 seconds. S2. Add the foaming material into the racket body mold and foam it for 8 minutes at 100℃ to obtain the foam core layer. Then, use the sealing screw plug to seal the hollow cavity shell to obtain the new Peak racket.

[0047] Comparative Example 2 The difference between this comparative example and Example 3 is that only the heat-resistant modifier is prepared without modifying the chloropropylated shell powder.

[0048] The foam core layer 1 is obtained by heating and foaming expanded polystyrene; and the outer shell 2 of the racket body is integrally molded by injection molding of nylon-based composite material, wherein the nylon-based composite material contains the following raw materials in parts by weight: 100 parts of nylon 6 resin, 50 parts of shell powder, 4 parts of 3-chloropropyltriethoxysilane, 4 parts of functional additives, and 2.8 parts of heat-resistant modifier.

[0049] The functional additive is composed of 1.5 parts by weight of antioxidant 1076 and 0.5 parts by weight of ultraviolet absorber UV-326, and the heat-resistant modifier is prepared by the following steps: By mass fraction, 1.89 parts by mass of 2-amino-4-trifluoromethylbenzaldehyde, 1.34 parts by mass of cyanoacetamide, 1.44 parts by mass of sodium ethoxide, and 45 parts by mass of anhydrous ethanol were mixed in a reaction vessel and reacted at 80°C for 30 minutes. After the reaction was completed, the reaction solution was poured into deionized water to precipitate. After filtering and separating the precipitate, the precipitate was recrystallized with anhydrous ethanol to obtain the heat-resistant modifier.

[0050] Furthermore, the novel Peak racket is manufactured by the following steps: S1. By mass, 2 parts of 3-chloropropyltriethoxysilane, 24 parts of shell powder, and 120 parts of 60% ethanol aqueous solution are mixed in a reaction vessel and reacted at 60°C for 3 hours. After the reaction is completed, the solid is separated by filtration and the obtained solid is washed with deionized water and dried to obtain chloropropylated shell powder. S2. By mass, 24.49 parts of chloromethylated shell powder, 1.4 parts of heat-resistant modifier, and 100 parts of nylon 6 and 2 functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the paddle body through injection molding. The injection molding process parameters are: barrel temperature 230℃, mold temperature 80℃, injection pressure 90MPa, holding pressure 40MPa, holding time 3 seconds, and cooling time 15 seconds. S3. Add the foaming material into the racket body mold and foam it for 8 minutes at 100℃ to obtain the foam core layer. Then, use the sealing screw plug to seal the hollow cavity shell to obtain the new Peak racket.

[0051] Experimental Example 1 The performance of the new Peak rackets obtained in Examples 1-3 and Comparative Examples 1-2 was tested. The surface condition of each component of the Peak racket was observed. The tensile strength, impact strength, glass transition temperature and creep resistance of the racket shell in each component sample were tested according to relevant national standards. The test results are shown in Table 1.

[0052] The tensile strength test was conducted in accordance with the national standard GB / T 1040.2-2022 "Determination of Tensile Properties of Plastics"; The impact strength test was conducted in accordance with the national standard GB / T 1843-2008 "Determination of Impact Strength of Plastic Cantilever Beams"; The glass transition temperature was determined in accordance with the national standard GB / T 19466.2-2004 "Differential Scanning Calorimetry (DSC) for Plastics - Part 2: Determination of Glass Transition Temperature"; The creep resistance was tested according to the national standard GB / T 11546.2-2022 "Determination of Creep Properties of Plastics" with a stress of 20 MPa, a test time of 1000 h, and a test temperature of 80℃.

[0053] Table 1

[0054] As can be seen from Table 1, after grafting modification with the heat-resistant modifier of the present invention, the tensile strength, impact strength and glass transition temperature of the racket shell in Examples 1 to 3 all increased significantly, and it also had better creep resistance. The heat-resistant modifier in Comparative Example 2, since it was not grafted, could not improve the compatibility between shell powder and nylon matrix. Therefore, although it had a higher actual addition amount, the final modification effect was much weaker than that in Example 3.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A new type of Peak racket, characterized in that, It includes a foam core layer, a racket body shell, and a handle. The foam core layer is obtained by heating and foaming a foaming material; The outer shell of the racket is made by injection molding from a mixture of bio-based fillers and plastic. The mixture also contains silane coupling agents, functional additives, and heat-resistant modifiers.

2. The novel Peak racket according to claim 1, characterized in that, The mass ratio of bio-based filler to plastic is 30-50:

100.

3. The novel Peak racket according to claim 1, characterized in that, Bio-based fillers include coffee grounds, shell powder, coconut shreds, or wheat straw.

4. The novel Peak racket according to claim 1, characterized in that, The plastic is one or more of PP, ABS, PC, and PA.

5. The novel Peak racket according to claim 1, characterized in that, The mass ratio of the mixed raw materials, silane coupling agent, functional additives, and heat-resistant modifier is 130-150:2-4:2-4:1.6-2.

8.

6. The novel Peak racket according to claim 5, characterized in that, The silane coupling agent is at least one of 3-chloropropyltriethoxysilane and 3-chloropropyltrimethoxysilane.

7. The novel Peak racket according to claim 1, characterized in that, The functional additive is at least one of antioxidants and ultraviolet absorbers.

8. The novel Peak racket according to claim 1, characterized in that, The heat-resistant modifier is obtained by a cyclocondensation reaction between a trifluoromethyl-containing o-aminobenzaldehyde derivative and a nitrile acetamide, wherein the trifluoromethyl-containing o-aminobenzaldehyde derivative is at least one of 2-amino-5-trifluoromethylbenzaldehyde and 2-amino-4-trifluoromethylbenzaldehyde.

9. The novel Peak racket according to claim 3, characterized in that, The manufacturing process of the racket body shell includes: Chloropropylated shell powder was obtained by loading a silane coupling agent onto the surface of shell powder. Modified shell powder is obtained by reacting chloropropylated shell powder with a heat-resistant modifier using a quaternary ammonium salt reaction. Modified shell powder, PA, and functional additives are mixed, melted in an injection molding machine, and then molded into the shell of the tamper through an injection molding process.

10. The novel Peak racket according to claim 9, characterized in that, The injection molding process parameters are as follows: barrel temperature 230-265℃, mold temperature 80-100℃, injection pressure 90-130MPa, holding pressure 40-80MPa, holding time 3-8 seconds, and cooling time 15-30 seconds.

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