Novel environment-friendly integrated volleyball and preparation method thereof

Abstract

The novel environment-friendly integrated volleyball is composed of an inner container, a nylon wire framework, a middle tire and leather from inside to outside, the inner container is a gas-carrying elastomer located on the innermost layer, and the nylon wire framework is formed by evenly winding nylon wires on the surface of the inner container along the center line of the inflatable inner container through a single wire winding method. The middle tire is formed by dipping gasoline mucilage on the inner container and the nylon wire and then heating or naturally airing the gasoline mucilage, and the leather is located on the outermost layer. The invention further discloses a preparation method of the novel environment-friendly integrated volleyball. According to the preparation process of the integrated volleyball, an adhesive is not used, and the middle tire and the leather are pressed together by heating the mold and applying pressure to the middle tire and the leather, so that the production process flow is simplified, the production efficiency is improved, and the product is good in environmental protection property, excellent in performance and high in durability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sports goods, in particular to a novel environment-friendly integrated volleyball and a preparation method thereof. BACKGROUND

[0002] As one of the three major ball games in the world, volleyball has a wide mass base and deep cultural influence all over the world. From professional leagues to campus playgrounds, from international competitions to community activities, the popularity of volleyball continues to rise, and it has become an important sports link connecting different countries and regions. In the field of competitive sports and public fitness, the quality of volleyball has a decisive influence on the technical performance of athletes and the experience of the game. High-quality volleyballs can ensure accurate flight trajectory, stable rebound performance and comfortable touch feedback, helping athletes to fully exert their technical level; while poor quality balls may cause flight trajectory deviation, uneven rebound force, and directly affect the fairness of the game and the competitive state of athletes.

[0003] However, the traditional volleyball manufacturing process has long-term technical bottlenecks that are difficult to overcome. First, chemical adhesives are commonly used in the production process to bond the surface layer and the inner liner. Such adhesives not only release volatile organic compounds to pollute the environment during production, but their residues can also penetrate the surface of the ball to change the material properties, resulting in uneven weight distribution or abnormal friction coefficient, which affects the player's ball control accuracy and hitting feel. Second, the traditional process relies on manual lamination of multiple layers of materials and high-temperature and high-pressure molding, involving more than ten processes such as cutting, gluing, lamination, and vulcanization. The production cycle is as long as several days and the yield is not high, resulting in high production costs, making it difficult for small and medium-sized manufacturers to achieve cost reduction and efficiency improvement through technological upgrading. Third, some traditional volleyballs use rubber or composite material inner liners, and their air tightness relies on physical compression sealing structure. In the long-term use, it is easy to have chronic air leakage due to molecular chain rupture or aging of the joint. At the same time, the difference in the thermal expansion coefficient between the polyurethane coating and the rubber matrix may cause irreversible deformation of the ball when the temperature changes, resulting in problems such as elastic attenuation and flight trajectory drift, which seriously shortens the service life of the volleyball and increases the maintenance cost. These technical defects not only restrict the quality improvement and market competitiveness of volleyball products, but also become an urgent need to promote technological innovation in the industry. SUMMARY

[0004] The present application aims to solve the above technical problems, and provides a water-based paint that can realize low-temperature tin plating and has good fast-drying and self-adhesive properties.

[0005] To achieve the above application purposes, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a new environment-friendly integrated volleyball, which is composed of an inner container, a nylon wire framework, a middle tire and a leather from inside to outside, the inner container is the gas elastic body located in the innermost layer, the nylon wire framework is that nylon wire is uniformly wound on the surface of the inner container along the center line of the inflatable inner container by single winding wire method, the middle tire is formed by petrol rubber paste soaked in the inner container and the nylon wire after being dried by heating or naturally, and the leather is located in the outermost layer.

[0007] Preferably, the leather is made of elastic cloth material.

[0008] Preferably, the nylon wire is high-elastic nylon wire, and the D value of the high-elastic nylon wire is preferably 20D-300D.

[0009] Preferably, the petrol rubber paste comprises rubber sheet raw material and 120 gasoline, the weight ratio of the rubber sheet raw material to the 120 gasoline is 1:3 to 1:5, and the rubber sheet raw material comprises the following components by weight: natural rubber 80-120 parts, calcium carbonate 40-60 parts, carbon black 10-30 parts, zinc oxide 3-5 parts, stearic acid 1-3 parts, terpene resin 2-4 parts, sulfur 1-3 parts, accelerator TT 0.5-1.5 parts, and antioxidant D 0.2-0.4 parts.

[0010] Preferably, the petrol rubber paste comprises rubber sheet raw material and 120 gasoline, the weight ratio of the rubber sheet raw material to the 120 gasoline is 1:4, and the rubber sheet raw material comprises the following components by weight: natural rubber 100 parts, calcium carbonate 50 parts, carbon black 20 parts, zinc oxide 4 parts, stearic acid 2 parts, terpene resin 3 parts, sulfur 2 parts, accelerator TT 1 part, and antioxidant D 0.3 part.

[0011] In a second aspect, the present application provides a method for preparing the new environment-friendly integrated volleyball, which comprises the following steps:

[0012] S1, winding the inflatable inner container with nylon wire to form a framework;

[0013] S2, soaking petrol rubber paste on the inner container and the nylon wire, and drying by heating or naturally to form a middle tire;

[0014] S3, pressing the middle tire and the leather together by using a mold, and performing heating and pressurizing treatment during the pressing process, so that the inner container, the nylon wire framework, the middle tire and the leather are tightly combined together.

[0015] Preferably, the heating temperature is 90-110℃.

[0016] Preferably, in the pressurizing treatment, the pressure is 0.4-0.8MPa, and the pressurizing time is 5-15 minutes.

[0017] The novel environment-friendly integrated volleyball of the present application is composed of an inner container, a nylon wire framework, a middle layer and a leather. The inner container, as the innermost layer, is made of high-quality gas elastic body, has good elasticity, can quickly recover to its original state after being hit by external force, ensures the rebound performance of the volleyball, and is beneficial to the performance of athletes. At the same time, the inner container has good air tightness, maintains the appropriate air pressure in the volleyball, and ensures the stable flight performance and hand feeling. The soft material of the inner container can make the integrated volleyball more comfortable when it is hit by the player's hand or body, reduce the harm to the player, and has strong durability, can withstand frequent hitting, friction and different environmental influences, is not easy to break and damage, and has a long service life. In addition, the framework material is made of professional high-elastic nylon wire, which is uniformly wound on the surface of the inner container along the center line of the inflatable inner container by single winding wire method, so that the inner container has good roundness and high rebound. The middle layer is formed by immersing the inner container and the nylon wire in gasoline glue paste and then heating or air drying, which plays a role in adhesion and shaping, serves as a structural bridge connecting the inner and outer layers, provides reliable support for the overall structure, enhances the stability of the internal structure, and improves the stability and durability of the product. The leather on the outermost layer is made of special integrated volleyball leather with elastic cloth bottom, which improves the overall softness and safety performance.

[0018] In the preparation process of the integrated volleyball of the present application, no adhesive is used, but a mold is used to press the middle layer and the leather together, which is environmentally friendly and durable. By heating and pressing under suitable temperature and pressure, the inner container, nylon wire, glue and leather are tightly combined, which simplifies the production process flow and can improve the production efficiency by more than 20% compared with the traditional process.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] (1) Good environmental protection: abandoning adhesive, avoiding the release of harmful chemicals, reducing environmental pollution, and creating a healthy environment for athletes and users.

[0021] (2) Superior performance: professional high-elastic nylon wire winding combined with high-quality inner container and special leather makes the volleyball have good roundness, high rebound, stable flight, soft hand feeling, improves the athletes' competition experience and competitive level.

[0022] (3) Strong durability: the inner container is durable, the nylon wire provides structural support, and the components are tightly combined, so that the volleyball can withstand frequent hitting and friction, is not easy to damage, reduces the use cost.

[0023] (4) High production efficiency: simplified process flow, reduced production links and time, improved production efficiency, reduced cost, enhanced economic benefits and market competitiveness of enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The existing volleyball preparation process flow diagram is shown.

[0025] Figure 2 The integrated volleyball manufacturing process flow diagram of the present application is shown. DETAILED DESCRIPTION

[0026] The technical solutions of the present application are further described below in combination with specific embodiments, but the present application is not limited to the following embodiments.

[0027] Unless specifically stated, the instruments or reagents used in the examples are conventional instruments or reagents in the art, which are conventional products that can be purchased on the market. Unless specifically stated, the specific experimental operations involved in this paper are understood or known by those skilled in the art according to their mastery of common knowledge or conventional technical means, and will not be described one by one.

[0028] The novel environment-friendly integrated volleyball of the present application is composed of an inner container, a nylon wire framework, a middle tire and leather from the inside out.

[0029] 1. Inner container manufacturing

[0030] The inner container, as the innermost layer, is made of high-quality carrier elastic body, which has good elasticity and can quickly recover to its original state after being hit by external force, ensuring the rebound performance of the ball and facilitating the player to play the technology.

[0031] A high-air-tightness inner container is made by mold pressing and forming, and after manufacturing, air tightness detection is performed. The qualified inner container enters the next process.

[0032] The inner container formula is as follows: 3L natural rubber 50 parts, butyl rubber 50 parts, ultra-fine light calcium carbonate 60 parts, carbon black 30 parts, zinc oxide 5 parts, stearic acid 2 parts, naphthenic oil 5 parts, antioxidant SP-C 1.5 parts, sulfur 1.5 parts, accelerator TT 0.1 parts, accelerator CBS 1 part (by weight). Prepared according to the conventional process.

[0033] 2. Framework winding

[0034] A single professional high-elastic nylon wire is wound evenly on the surface of the inner container through the center line of the inner container using a single set of winding equipment (single-winding wire method), ensuring uniform tension of the nylon wire, forming a nylon wire framework, and ensuring the roundness and stability of the winding yarn inner container.

[0035] The D value of the high-elasticity nylon thread is preferably 20D-300D, more preferably 50D-200D, 80D-120D, 100D-200D, the thread diameter is usually 0.30-0.35mm, and the thread has good flexibility and wear resistance, the tensile strength can reach 6-8kgf (60-80N), the elongation at break is 30%-35%, and the elastic recovery rate can reach more than 95% after 10% stretching. The wear resistance wear index is >30000 turns, and there is no obvious damage. The dynamic elastic modulus is 200-300MPa, and the anti-deformation ability is strong during rapid deformation. The specific selection can be made according to the use requirements.

[0036] 3. Middle tire manufacturing

[0037] The inner liner wound with the nylon thread is immersed in the gasoline rubber paste, taken out after sufficient immersion, and then heated and dried or naturally dried, so that the gasoline rubber paste is dried and shaped to form the middle tire.

[0038] The components of the gasoline rubber paste are all conventional commercially available products.

[0039] The manufacturing steps of the gasoline rubber paste are as follows:

[0040] (1) Preparation of rubber sheet raw materials

[0041] According to the formula proportion, the components of the rubber sheet raw materials are weighed.

[0042] Formula example 1: natural rubber 100 parts, calcium carbonate 50 parts, carbon black 20 parts, zinc oxide 4 parts, stearic acid 2 parts, terpene resin 3 parts, sulfur 2 parts, accelerator TT 1 part, antioxidant D 0.3 part. The above are all weight fractions.

[0043] Formula example 2: natural rubber 80 parts, calcium carbonate 40 parts, carbon black 10 parts, zinc oxide 3 parts, stearic acid 1 part, terpene resin 2 parts, sulfur 1 part, accelerator TT 0.5 part, antioxidant D 0.2 part. The above are all weight fractions.

[0044] Formula example 3: natural rubber 120 parts, calcium carbonate 60 parts, carbon black 30 parts, zinc oxide 5 parts, stearic acid 3 parts, terpene resin 4 parts, sulfur 3 parts, accelerator TT 1.5 parts, antioxidant D 0.4 parts. The above are all weight fractions.

[0045] (2) Preliminary treatment

[0046] After the natural rubber is plasticized, it is mixed by a banbury mixer, all the powders (calcium carbonate, carbon black, zinc oxide, stearic acid, terpene resin) are added to the rubber, the mixing time is 10 minutes to ensure uniform mixing, the mixed rubber material is cooled and placed for more than 5 hours, and then the vulcanization system (sulfur, accelerator TT, antioxidant D) is added and mixed by an open mill, the mixed rubber is pressed into a rubber sheet with a thickness of 3-4mm, and then cut into small pieces by a slicing machine for subsequent processing.

[0047] (3) Preparation of the glue paste

[0048] Cut the rubber sheet into small pieces and add them into the blender. Add 120 gasoline in a weight ratio of 1:3 to 1:5 and blend for 8-12 hours until the rubber is completely dissolved and a uniform glue paste is formed. Let it stand for more than 8 hours to ensure the stability of the glue paste.

[0049] During the blending process, pay attention to the uniformity of the blending to avoid the formation of sediment or lumps and ensure the viscosity and smoothness of the glue paste.

[0050] (4) Preparation before use

[0051] Before use, re-blend the glue paste to ensure that its viscosity and solubility meet the requirements.

[0052] When applying the glue paste, first dry the water on the surface of the substrate or bake it, then evenly apply the glue paste, appropriately control the amount of glue paste, and let it dry after each application before applying the next one. The number of applications is generally 2-4 times. The remaining glue paste should be stored in a cool and ventilated place in a sealed manner to avoid large temperature changes or external pollution, so as to ensure the quality and service life of the glue paste.

[0053] (5) Matters needing attention

[0054] During the preparation of the glue paste, the proportion of each component should be strictly controlled to avoid the deterioration of the quality of the glue paste due to the improper proportion.

[0055] Use 120 gasoline as the solvent because it dissolves well with rubber and is suitable for mixing with rubber materials, while avoiding the use of other low-quality gasoline (such as 93 gasoline) to ensure the quality of the glue paste and the vulcanization effect.

[0056] Through the above steps, a special natural rubber gasoline glue paste can be prepared for the subsequent molding of the integrated volleyball.

[0057] 4. Compression molding

[0058] Place the middle tire into the mold, cover it with a stretch cloth and leather, and then put it into the shaping mold. Heat the mold to 90-110°C and press it to 0.4-0.8 MPa for 5-15 minutes to make the parts tightly combined to form an integrated volleyball.

[0059] 5. Quality inspection

[0060] Perform overall quality inspection on the appearance, size, rebounding, air tightness, etc. of the molded volleyball, and the qualified products are shipped out.

[0061] Figure 1A schematic diagram of an existing volleyball manufacturing process is shown. The existing conventional volleyball manufacturing process includes the following steps: winding cotton yarn to form an inner container to form a framework, gluing to form a middle tire, vulcanizing the middle tire, polishing the middle tire after vulcanization, then coating the middle tire surface with adhesive, and then using a mold to assist in skinning after leather edge cutting. Figure 2 A schematic diagram of the integrated volleyball manufacturing process of the present application is shown. As shown in Figure 2 The manufacturing process of the present application does not require adhesive, is more environmentally friendly, simplifies the process, and improves production efficiency, and the integrated volleyball meets the requirements of relevant standards for various properties. The integrated volleyball manufacturing process of the present application does not use adhesive, but uses a mold to press the middle tire and leather together, which is environmentally friendly and durable. By heating and pressing under suitable temperature and pressure, the inner container, nylon line, rubber and leather are tightly combined, simplifying the production process, and the production efficiency can be improved by more than 20% compared with the traditional process.

[0062] The performance of the volleyball product is detected according to GB / T 22882-2008. Table 1 shows the various properties of the integrated volleyball made by using different gasoline rubber paste examples.

[0063] Gasoline rubber paste example 1: rubber sheet raw material formula example 1, the weight ratio of rubber sheet raw material to 120 gasoline is 1:4.

[0064] Gasoline rubber paste example 2: rubber sheet raw material formula example 2, the weight ratio of rubber sheet raw material to 120 gasoline is 1:3.

[0065] Gasoline rubber paste example 3: rubber sheet raw material formula example 3, the weight ratio of rubber sheet raw material to 120 gasoline is 1:5.

[0066] Table 1. Comparison of volleyball performance

[0067]

[0068] The test results show that the appearance quality, product air tightness, rebound height and impact resistance of the integrated volleyball made by the manufacturing process of the present application all meet the industry standards.

[0069] It can be seen that the present application has the following advantages: (1) Good environmental protection: abandoning adhesive, avoiding the release of harmful chemicals, reducing environmental pollution, and creating a healthy environment for athletes and users. (2) Superior performance: professional high-elasticity nylon thread winding combined with high-quality inner container and specially-made leather makes the volleyball good in roundness, high in rebound, stable in flight, soft in touch, and improves the athletes' competition experience and competitive level. (3) Strong durability: the inner container is durable, the nylon thread provides structural support, and the components are tightly combined, so that the volleyball can withstand frequent hitting and friction, is not easy to be damaged, and reduces the use cost. (4) High production efficiency: simplifying the process flow, reducing production links and time, improving production efficiency, reducing cost, enhancing enterprise economic benefit and market competitiveness.

[0070] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A novel environmentally friendly one-piece volleyball, characterized in that, It consists of an inner liner, a nylon thread skeleton, a middle tire, and leather from the inside out. The inner liner is the innermost air-carrying elastomer. The nylon thread skeleton is formed by evenly winding nylon threads along the center line of the inflatable inner liner surface using a single-strand winding method. The middle tire is formed by impregnating the inner liner and nylon threads with gasoline adhesive and then heating or air-drying them. The leather is the outermost layer.

2. The novel environmentally friendly integrated volleyball according to claim 1, characterized in that, The leather is made of elastic fabric.

3. The novel environmentally friendly integrated volleyball according to claim 1, characterized in that, The nylon thread is a high-elasticity nylon thread.

4. The novel environmentally friendly integrated volleyball according to claim 1, characterized in that, The gasoline adhesive comprises rubber sheet raw material and 120-octane gasoline, wherein the weight ratio of the rubber sheet raw material to the 120-octane gasoline is 1:3 to 1:

5. The rubber sheet raw material comprises the following components by weight: 80-120 parts natural rubber, 40-60 parts calcium carbonate, 10-30 parts carbon black, 3-5 parts zinc oxide, 1-3 parts stearic acid, 2-4 parts terpene resin, 1-3 parts sulfur, 0.5-1.5 parts accelerator TT, and 0.2-0.4 parts antioxidant D.

5. The novel environmentally friendly integrated volleyball according to claim 1, characterized in that, The gasoline adhesive comprises rubber sheet raw material and 120-octane gasoline, with a weight ratio of rubber sheet raw material to 120-octane gasoline of 1:

4. The rubber sheet raw material comprises the following components by weight: 100 parts natural rubber, 50 parts calcium carbonate, 20 parts carbon black, 4 parts zinc oxide, 2 parts stearic acid, 3 parts terpene resin, 2 parts sulfur, 1 part accelerator TT, and 0.3 parts antioxidant D.

6. A method for preparing the novel environmentally friendly integrated volleyball according to any one of claims 1 to 5, characterized in that... Includes the following steps: S1. Wrap nylon thread around the inflatable inner liner to form a skeleton; S2. Apply gasoline adhesive to the inner liner and nylon thread, then heat or air dry to form the intermediate tire; S3. Use a mold to press the inner tube and leather together, and heat and pressurize them during the pressing process to make the inner tube, nylon skeleton, inner tube and leather tightly bonded together.

7. The method according to claim 6, characterized in that, The heating temperature is 90℃ to 110℃.

8. The method according to claim 6 or 7, characterized in that, During the pressurization process, the pressure is 0.4 MPa to 0.8 MPa, and the pressurization time is 5 to 15 minutes.

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