Preparation method of machine-pasted basketball with stem lines

Abstract

The machine-pasted basketball comprises an air container, a protective layer, a rubber layer and a plurality of ball skins, and the specific preparation steps are as follows: inflating the air container, winding a yarn with a corresponding length on the surface layer of the air container to form a yarn container or pasting a cloth container, cutting the rubber middle tire skins into rubber sheets, pasting the rubber sheets into two mold cavities with air suction holes respectively, and pressing the rubber sheets on the mold cavities to form the machine-pasted basketball. The manufacturing method comprises the following steps: putting a yarn liner and a cloth liner into a rubber tire to be manufactured into an unvulcanized rubber tire, putting the unvulcanized rubber tire into a vulcanization mold with a stem line to be vulcanized, manufacturing a rubber middle tire with the stem line, pasting processed leather with a rubber film into two machine pasting air suction mold cavities which are provided with the stem line and have needle hole adsorption, then aligning the stem line and putting the rubber middle tire coated with a layer of rubber film into the rubber middle tire; and putting the machine-pasted basketball into a shaping mold with mold temperature, and heating and pressurizing the machine-pasted basketball to prepare the machine-pasted basketball. Compared with a conventional manually-attached basketball, the appearance of the stem lines and the sheet shapes of the basketball is smoother, free of wrinkles and more bridged, and the appearance performance of the basketball can better meet the requirements of consumers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber basketball, in particular to a preparation method of a machine-pasted basketball with a string. BACKGROUND

[0002] The currently used glue-adhered leather basketball has a surface structure with a string, most of which are manually glued and pasted, and the conventional basketball glue is only suitable for manual adhesion, so as to better observe the pasting of the string. Such preparation process not only has low production capacity and high labor cost, but also is prone to wrinkles, cracks and edge lifting, which cannot meet the needs of consumers.

[0003] Some basketballs are also pasted by machines, but the string is pasted on the smooth surface of the tire, and then the string is adhered by different methods. The string needs to be made, glued and pasted on the ball, so the method is time-consuming and the string is prone to peeling off. For users, it greatly affects the experience and the sales of the basketball. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a machine-pasted basketball with a string and a preparation method.

[0005] To achieve the above-mentioned purpose, on the one hand, the present application provides a machine-pasted basketball with a string, comprising: an air bladder, a protective layer, a rubber layer and a plurality of leather skins, the protective layer and the rubber layer are sequentially wrapped on the outer surface of the air bladder, a first adhesive layer is arranged between the air bladder and the protective layer, a protrusion is arranged on the outer surface of the rubber layer, the protrusion separates the outer surface of the rubber layer into a plurality of patch areas, a plurality of leather skins are pasted on the patch areas, and a second adhesive layer is arranged between the leather skins and the rubber layer.

[0006] Further, the protective layer is a yarn layer or a cloth layer, the yarn layer comprises yarns wound on the outer surface of the air bladder, and the cloth layer comprises at least one cloth piece adhered to the air bladder.

[0007] On the other hand, the present application provides a preparation method of a machine-pasted basketball with a string, comprising the following steps:

[0008] S1. Making a rubber tire with a string

[0009] Inflating the air bladder to the required diameter, winding yarns of the corresponding length on the surface layer to form a yarn bladder, or pasting one or more layers of cloth on the surface layer to form a cloth bladder;

[0010] The rubber tire skin is cut into rubber pieces, which are respectively attached to two mold cavities with air suction holes, and then placed into a yarn or cloth container to form an unvulcanized rubber tire, and the unvulcanized rubber tire is placed into a vulcanization mold of a corresponding size to form a rubber tire with a string line, wherein the vulcanization mold is provided with a basketball string line outwardly protruding.

[0011] On the surface of the obtained rubber tire with a string line, a layer of tire water-based adhesive is brushed, and is naturally air-dried or low-temperature baked until the glue film is completely dried.

[0012] S2. Preparation of leather ball skin

[0013] The temperature-resistant ball leather is punched according to the size of the basketball piece type to obtain the leather ball skin, which is brushed with water-based adhesive once or twice and baked and dried.

[0014] S3. Machine pasting of ball skin

[0015] The ball skin prepared in S2 is placed flat in two vacuum-adsorbed mold cavities, and the mold is engraved with a basketball string line, and the mold is outwardly protruding, and the string line width is determined according to different ball types.

[0016] The air nozzle of the rubber tire with a string line prepared in S1 is aligned with the air nozzle of the vacuum mold, and is placed into the mold, and is inflated and pressure- maintained to make the string line in the mold cavity and the string line of the rubber tire well aligned, and the mold is automatically closed, and the ball skin and the rubber tire with a string line are bonded together under the action of air pressure and low temperature or normal temperature, to obtain a machine-pasted basketball.

[0017] In some embodiments, the material of the winding layer is one or more of cotton yarn, polyester yarn, nylon yarn, short polyester yarn, long polyester yarn, nylon N6 yarn or nylon N66 yarn, and the base material layer is one of non-woven fabric, dustproof cloth, polyester cloth or flannel.

[0018] In some embodiments, in S1, the raw material composition of the water-based adhesive is 8-15 parts of water-based resin, 30-60 parts of water-based emulsion, 20-50 parts of deionized water, 2-5 parts of auxiliary agent, and 1-3 parts of pigment, wherein the water-based resin is one of water-based polyurethane resin and water-based acrylic resin, and the water-based emulsion is one or two or more of chlorobutyl emulsion, acrylic emulsion, VAE emulsion and natural latex.

[0019] In some embodiments, in S1, the low-temperature baking is baking at 30-60 degrees for 5-15 minutes.

[0020] In some embodiments, in the S2, the raw material composition of the aqueous adhesive is 30-60 parts of aqueous resin, 10-30 parts of aqueous emulsion, 50-60 parts of deionized water, and 2-5 parts of auxiliary, wherein the aqueous resin is one of aqueous polyurethane resin and aqueous acrylic resin, and the aqueous emulsion is one or two or more than two kinds of chloroprene emulsion, acrylic emulsion, VAE emulsion, and natural latex prepared in proportion.

[0021] In some embodiments, in the S2, the punched ball skin is deburred around the four sides, so that the finished sheet type has a certain slope and is highly matched with the rubber tire.

[0022] In some embodiments, in the S3, the machine pasting conditions are: temperature: room temperature-50℃, pressure: 4-8kgf / cm2, inflation time: 30-200 seconds, and exhaust time: 20-40.

[0023] In some embodiments, S4. Shaping: the machine pasting ball prepared in S3 is placed in a shaping mold for hot pressing and shaping, wherein the temperature is 40-70℃, the pressure is 4-6kgf / cm 2 , and the inflation time is 90-240 seconds.

[0024] Due to the above technical solutions, the application has the following advantages:

[0025] 1. The application can greatly improve the production efficiency by machine pasting, and the working hours are 4-5 times less than manual operation.

[0026] 2. The basketball prepared by the application has better adhesive strength and high peeling value between the sheet and the tire, which can reach 5-10kgf / cm 2 , and the service life of the product is improved by more than 2 times.

[0027] 3. The basketball prepared by the application can withstand high temperature and high humidity: high temperature 70℃, high humidity 60%, and is suitable for long-term sea transportation.

[0028] 4. The machine pasted basketball of the patent has the same appearance effect as the conventional hand pasted basketball, and does not affect the experience of consumers. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a 3D effect diagram of the finished machine pasted basketball;

[0030] Figure 2 is an effect diagram of the rubber ball sheet of the machine pasted basketball;

[0031] Figure 3 is a schematic diagram of the machine pasted basketball;

[0032] Figure 4 is a sectional view of the machine pasted basketball;

[0033] Figure 5 This is an image showing the effect of machine-applied basketball during the shaping process.

[0034] The reference numerals used in the above figures are explained as follows:

[0035] 1. Air bladder; 2. Protective layer; 21. First adhesive layer; 3. Rubber layer; 4. Second adhesive layer; 41. Protrusion; 5. Ball skin; 51. Chamfered edge. Detailed Implementation

[0036] The following description, in conjunction with specific embodiments, provides further details, but the present invention is not limited to these embodiments.

[0037] Example 1

[0038] like Figure 1 As shown, a machine-attached basketball with a strut includes: an air bladder 1, a protective layer 2, a rubber layer 3, and multiple ball skins 5. The protective layer 2 and the rubber layer are sequentially wrapped around the outer surface of the air bladder. A first adhesive layer 21 is provided between the air bladder 1 and the protective layer 2. A protrusion 41 is provided on the outer surface of the rubber layer 3, and the protrusion 41 divides the outer surface of the rubber layer 3 into multiple patch areas. Multiple ball skins 5 are attached to the patch areas, and a second adhesive layer 4 is provided between the ball skins 5 and the rubber layer.

[0039] The protective layer 2 is a yarn layer or a cloth layer. The yarn layer includes yarn wrapped around the outer surface of the air bladder 1, and the cloth layer includes at least one cloth piece that is adhered to the air bladder 1.

[0040] The air bladder 1 is the core inflation component of the basketball, made of synthetic rubber, possessing excellent airtightness. It provides internal air pressure support for the basketball, forming the basis for maintaining its shape and elasticity. The protective layer 2, located on the outer surface of the air bladder 1, is a structural reinforcement layer encasing it. Its function is to enhance the structural stability of the air bladder 1, preventing excessive deformation or rupture under external impact, and simultaneously providing a substrate for the subsequent rubber layer 3. The rubber layer 3, located outside the protective layer 2, is a structural layer made of rubber material, possessing a certain degree of elasticity and hardness. It provides the basic outline of the basketball, and the protrusions 4 on the outer surface of the rubber layer 3 form the basketball's struts.

[0041] The outer shell 5 is the outer structure of the basketball, made of any one of PVC, PU, ​​microfiber PU, or genuine leather. The first adhesive layer 21 is an adhesive layer located between the air bladder 1 and the protective layer 2. It is formed by applying a water-based adhesive to the outer surface of the air bladder 1 and is used to firmly adhere the protective layer 2 to the outer surface of the air bladder 1, preventing relative sliding or separation between the protective layer 2 and the air bladder 1, and ensuring the integrity of the structure.

[0042] The protrusion 4 is a protrusion structure arranged on the outer surface of the rubber layer 3, and simultaneously serves as a string line of the basketball, separates the rubber layer 3 into multiple areas, and is used for attaching the leather 5.

[0043] The second adhesive layer 4 is an adhesive layer between the leather 5 and the rubber layer 3, which is formed by applying a water-based adhesive on the outer surface of the rubber layer 3, and is used for firmly attaching the leather 5 on the patch area of the rubber layer 3, and ensures that the leather 5 will not fall off or curl up during the use of the basketball.

[0044] The steps of the preparation method are as follows:

[0045] S1. Making a rubber tire with a string line

[0046] 1) Making a rubber sheet

[0047] The rubber raw material is punched, mixed and calendered into a sheet to ensure the stable performance of the rubber material; the calendered sheet is cut into a sheet shape as shown in FIG. 1; Figure 2

[0048] 2) Making a yarn bladder

[0049] The inflatable bladder is inflated in a pre-set template size, and a layer of yarn of corresponding strength and length is wound on the surface to make a yarn bladder, wherein the yarn includes one of cotton yarn, spun yarn, polyamide yarn, polyester yarn and nylon yarn, and the cotton yarn is used in the embodiment, and the layer of yarn is sufficient to ensure the strength of the ball and prevent deformation during use;

[0050] 3) Making a rubber tire with a string line

[0051] The prepared rubber sheet is attached to the upper and lower mold cavities with vacuum adsorption, and then the yarn bladder or cloth bladder is placed in the mold cavity to automatically combine the mold to make an unvulcanized rubber tire, and then the unvulcanized rubber tire is placed in a corresponding size vulcanization mold to vulcanize to make a rubber tire with a string line; vulcanization: temperature: 150-180℃, pressure: 8-10kgf / cm 2 , vulcanization time: 300-420 seconds;

[0052] The vulcanization mold is provided with outwardly protruding basketball string lines, and the design of the basketball string lines is as follows: height: 0.5-1.8mm, width of the string line: 4.5-6mm according to international and domestic standards: 7, 6, 5, width of the string line of 4: 3-5mm, width of the string line of 2: 3-4mm, and the vulcanization mold is also provided with an inwardly concave patch-shaped arc, which is used to make the patch look good visually, and the air resistance during hitting and passing makes the passing direction balanced.

[0053] 4) Brushing a layer of water-based adhesive on the rubber tire with a string line

[0054] ​The raw material composition of the water-based adhesive used is: 15 parts of water-based polyurethane resin, 50 parts of water-based emulsion (chlorobutyl emulsion), 30 parts of deionized water, 4 parts of auxiliary agent (1 part of leveling agent, 1 part of defoaming agent, 2 parts of gelling agent: hydroxyethyl cellulose), 1 part of pigment, which is consistent with the color of the rubber tire with the cord line, and is made into an environmentally friendly water-based adhesive for the tire. The above obtained water-based adhesive is brushed on the rubber tire with the cord line, and is naturally air dried or low temperature baked at 30-60 degrees for 5-15 minutes until the glue film is completely dried;

[0055] S2. Leather ball skin 5 manufacturing

[0056] The temperature-resistant ball leather is punched according to the size of the basketball sheet type to obtain a leather ball sheet as shown in Figure 3 The sheet material is conventional PVC, PU, microfiber PU, TPU foam, EVA foam, and genuine leather, etc. The punched ball skin is used to transfer the customer's LOGO on the corresponding ball skin of the ball body using a high-frequency machine.

[0057] The punched sheet type does not need to be trimmed or needs to be trimmed,

[0058] a: The sheet type is not trimmed, the rubber tire has the same slope and curvature as the finished product with trimming, and the cord line height matches the sheet thickness

[0059] b: The trimming method of the sheet type is: using a trimming machine to thin the edge to 0.4-1mm in thickness at the edge of 4-6mm wide, so that the finished sheet type has a certain slope, and the appearance is beautiful or not trimmed, and the height of the middle tire with the cord line is matched.

[0060] A layer of water-based adhesive is brushed on the ball skin, and baked and dried, wherein the raw material composition of the water-based adhesive is: 35 parts of water-based polyurethane resin, 12 parts of VAE water-based emulsion, 50 parts of deionized water, 3 parts of auxiliary agent (leveling agent: 1 part, defoaming agent: 1 part, gelling agent: hydroxyethyl cellulose 2 parts), and an environmentally friendly water-based adhesive for leather is prepared. The ball skin is brushed once or twice with the water-based adhesive for leather, and is naturally air dried or low temperature baked at 30-60 degrees for 5-15 minutes until the glue film is completely dried.

[0061] S3. Machine pasting ball skin

[0062] The ball skin 5 manufactured in S2 is placed flat in two vacuum-suctioned mold cavities. The mold is engraved with basketball cord lines, and the mold is outwardly convex with a convex width of 3-6mm, which is determined according to the width of the ball cord line of different ball types, and the convex height is 0.5-1.2mm. The leather ball sheet can be clamped between the basketball cord lines, and the ball skin is flat and wrinkle-free on the vacuum-suctioned mold.

[0063] Under the action of vacuum adsorption, firmly paste on the inner wall of the mold, the air valve of the rubber tire with string prepared by S1 is put into the mold, and the string in the mold cavity is aligned with the string of the rubber tire, and the ball skin is adhered to the rubber tire with string to prepare the machine-pasted basketball.

[0064] The machine-pasting conditions are: room temperature, pressure: 4 kgf / cm2, inflation time: 30 seconds, and exhaust time: 30 seconds.

[0065] Example 2

[0066] As shown in Figure 1 , a method for preparing a machine-pasted basketball with string, comprising the following steps:

[0067] S1. Making a rubber tire with string

[0068] 1) Making a rubber sheet

[0069] The rubber raw materials are mixed and calendered into a sheet to ensure the stability of the rubber material; the calendered sheet is cut into a sheet shape as shown in Figure 2 .

[0070] 2) Making a gauze bladder

[0071] The inflatable bladder is inflated in a pre-set template size, and a layer of yarn of corresponding strength and length is wound on the surface to make a yarn bladder. The yarn includes one of cotton yarn, spun yarn, nylon yarn, polyester yarn, and nylon yarn. In this embodiment, cotton yarn is used. The layer of yarn is sufficient to ensure the strength of the ball and prevent deformation during use. Then, one or more layers of cloth are attached to the surface to make a cloth bladder. The cloth includes one of non-woven fabric, polyester, cotton, acrylic, and cotton-polyester blend. In this embodiment, non-woven fabric is used.

[0072] 3) Making a rubber tire with string

[0073] The prepared rubber sheet is attached to the upper and lower mold cavities with vacuum adsorption, and the yarn bladder or cloth bladder is then put into the mold cavity to automatically close the mold to make an unvulcanized rubber tire. Then, the unvulcanized rubber tire is placed in a corresponding size vulcanization mold to vulcanize to make a rubber tire with string. The vulcanization temperature is 150-180℃, the pressure is 8-10 kgf / cm 2 , and the vulcanization time is 300-420 seconds.

[0074] The vulcanization mold is provided with outwardly protruding basketball stem lines, and the design of the basketball stem lines is as follows: height: 0.5-1.8mm, width: 4.5-6mm according to international and domestic standards: No. 7, No. 6, No. 5, width: 3-5mm for No. 4, and width: 3-4mm for No. 2. Meanwhile, the vulcanization mold is also provided with inwardly concave sheet-shaped arcs, which aims to make the sheet-shaped appearance visually good-looking, and the air resistance of the beating and passing of the ball makes the passing of the ball balanced in direction.

[0075] 4) The rubber tire with stem lines is coated with a layer of water-based adhesive

[0076] The raw material composition of the water-based adhesive used is as follows: 12 parts of water-based acrylic resin, 55 parts of water-based emulsion: chlorobutyl emulsion, 40 parts of deionized water, 4 parts of additives (leveling agent: 1.5 parts, defoaming agent: 1 part, gelling agent: hydroxyethyl cellulose 1.5 parts), and 1.5 parts of pigment, which is consistent with the color of the stem lines of the rubber tire. The water-based adhesive obtained above is coated on the rubber tire with stem lines, and is naturally air-dried or low-temperature baked at 30-60 degrees for 5-15 minutes until the adhesive film is completely dried.

[0077] S2. Leather ball skin 5 manufacturing

[0078] The temperature-resistant ball leather is punched according to the size of the basketball sheet, and the leather ball sheet is obtained as shown in Figure 3 The sheet material is conventional PVC, PU, super-fiber PU, TPU foam, EVA foam, and real leather, etc. The punched ball skin is used to transfer the customer's LOGO on the corresponding ball skin of the ball body by using a high-frequency machine.

[0079] The punched sheet type does not need to be edge-cut or needs to be edge-cut,

[0080] a: The sheet type is not edge-cut, the rubber tire has the same slope and arc as the finished product with edge-cut, and the stem line height matches the sheet thickness

[0081] b: The sheet type is edge-cut, that is, the edge is thinned by using an edge-cutting machine at a width of 4-6mm, so that the edge thickness is 0.4-1mm, and the finished sheet type has a certain slope, which is beautiful in appearance or does not need to be edge-cut, and the height of the stem line of the middle tire matches.

[0082] A layer of water-based adhesive is coated on the ball skin, and baked and dried, wherein the raw material composition of the water-based adhesive is as follows: 45 parts of water-based acrylic resin, 10 parts of VAE water-based emulsion, 55 parts of deionized water, 3.5 parts of additives (leveling agent: 1 part, defoaming agent: 1 part, gelling agent: hydroxyethyl cellulose 1.5 parts), and the leather ball skin is coated with the water-based adhesive once or twice, and is naturally air-dried or low-temperature baked at 30-60 degrees for 5-15 minutes until the adhesive film is completely dried.

[0083] S3. Machine-applied ball skin

[0084] Place the S2-made ball skin 5 flat in the two vacuum adsorption mold cavities. The mold is engraved with basketball rib lines and protrudes outward from the inside of the mold. The width of the protrusion is 3-6mm, depending on the shape of the ball. The height of the protrusion is 0.5-1.2mm. The leather ball piece can be precisely inserted between the basketball rib lines. The ball skin is flat and wrinkle-free and attached to the vacuum adsorption mold.

[0085] Under the action of vacuum adsorption, it is firmly attached to the inner wall of the mold. The air nozzle of the rubber tire with stem lines made by S1 is aligned with the air nozzle of the vacuum mold and placed into the mold. The mold is inflated and pressurized so that the stem lines in the mold cavity are aligned with the stem lines of the rubber tire. The mold is automatically closed, and the ball skin and the rubber tire with stem lines are bonded together to produce a machine-attached basketball.

[0086] The conditions for machine bonding are: room temperature, pressure: 4 kgf / cm2, inflation time: 30 seconds, deflation time: 25 seconds.

[0087] Example 3

[0088] like Figure 4 As shown, unlike Example 2, step S4 is also included. Shaping involves placing the machine-attached basketball obtained in S3 into a shaping mold and hot-pressing it to accelerate adhesive curing. Temperature: 40-70℃, Pressure: 4-6 kgf / cm² 2 Inflation time: 90-240 seconds. Then, the basketball's physical properties are tested, including weight, circumference, bounce, and deformation, to ensure it meets national or NBA standards.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. However, any modifications, alterations, and variations made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A machine-applied basketball with a strut, characterized in that, include: The system comprises an air bladder, a protective layer, a rubber layer, and multiple ball skins. The protective layer and the rubber layer are sequentially wrapped around the outer surface of the air bladder. A first adhesive layer is provided between the air bladder and the protective layer. The outer surface of the rubber layer has protrusions that divide the outer surface of the rubber layer into multiple patch areas. Multiple ball skins are attached to the patch areas, and a second adhesive layer is provided between the ball skins and the rubber layer.

2. The machine-attached basketball with a strut as described in claim 1, characterized in that, The protective layer is a yarn layer or a cloth layer. The yarn layer includes yarn wrapped around the outer surface of the air bladder, and the cloth layer includes at least one cloth sheet that is adhered to the air bladder.

3. The method for preparing a machine-attached basketball with struts as described in claim 1, characterized in that, The steps are as follows: S1. Making rubber tires with struts Inflate the air bladder to the required diameter, and wrap the corresponding length of yarn around its surface to make a yarn bladder, or attach one or more layers of cloth to its surface to make a cloth bladder. The rubber inner layer is cut into rubber sheets, which are then attached to two mold cavities with air suction holes. A yarn or cloth lining is placed inside to make an unvulcanized rubber tire. The unvulcanized rubber tire is then placed into a vulcanizing mold of the appropriate size to vulcanize and make a rubber tire with a stem. The vulcanizing mold has outward-protruding basketball stems. Apply a layer of water-based adhesive to the surface of the obtained rubber tire with struts, and let it air dry or bake at a low temperature until the rubber film is completely dry. S2. Preparation of leather ball skin The heat-resistant ball leather is cut to the size of a basketball ball to obtain a leather ball skin. One or two water-based adhesives are applied to its surface, and then it is baked and dried. S3. Machine-applied ball skin The ball skin made by S2 is placed flat in two vacuum adsorption mold cavities. The mold is engraved with basketball rim lines and convex outwards. The width of the rim lines is determined according to different ball shapes. The air nozzle of the rubber tire with stems obtained by S1 is aligned with the air nozzle of the vacuum mold and placed into the mold. The mold is inflated and pressurized so that the stems in the mold cavity are aligned with the stems of the rubber tire. The mold is automatically closed, and the ball skin is bonded to the rubber tire with stems under the action of air pressure and low or normal temperature to produce a machine-bonded basketball.

4. The preparation method according to claim 3, characterized in that, In S1, the raw material composition of the water-based adhesive is 8-15 parts of water-based resin, 30-60 parts of water-based emulsion, 20-50 parts of deionized water, 2-5 parts of additives, and 1-3 parts of pigment. The water-based resin is one of water-based polyurethane resin and water-based acrylic resin, and the water-based emulsion is one or more of chloroprene emulsion, acrylic emulsion, VAE emulsion, and natural latex, or two or more of them, formulated in proportion.

5. The preparation method according to claim 3, characterized in that, In S1, the low-temperature baking is: baking at 30-60 degrees Celsius for 5-15 minutes.

6. The preparation method according to claim 3, characterized in that, In S2, the raw material composition of the water-based adhesive is 30-60 parts of water-based resin, 10-30 parts of water-based emulsion, 50-60 parts of deionized water, and 2-5 parts of additives. The water-based resin is one of water-based polyurethane resin and water-based acrylic resin, and the water-based emulsion is one or more of chloroprene emulsion, acrylic emulsion, VAE emulsion, and natural latex, or two or more of them, formulated in proportion.

7. The preparation method according to claim 3, characterized in that, In step S2, the edges of the punched ball skin are beveled to give the finished sheet a certain slope, which matches the height of the rubber tire with stem lines.

8. The preparation method according to claim 3, characterized in that, In step S3, the conditions for machine bonding are: Temperature: ambient temperature - 50℃, pressure: 4-8 kgf / cm2, inflation time: 30-200 seconds, deflation time: 20-40 seconds.

9. The preparation method according to any one of claims 3-8, characterized in that, It may also include S4. Shaping: The machine-made spheres obtained in S3 are placed in a shaping mold and hot-pressed for shaping, wherein the temperature is 40-70℃ and the pressure is 4-6 kgf / cm. 2 Inflation time: 90-240 seconds; deflation time: 20-40 seconds.

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