A substantially spherical hollow body, having a diameter of from 37 mm to 45 mm, in particular a diameter of 39.7 mm to 40.75 mm, and a weight of from 2.5 g to 3.5 g, in particular a weight of 2.6 g to 2.85 g, comprising a shell and an inner hollow space, wherein the shell has a wall thickness of 0.2 mm to 1.3 mm, in particular 0.3 mm to 0.8 mm, characterized in that the shell is free of celluloid and comprises at least one styrene-containing copolymer.

A valve unit for a valve of an inflatable body, in particular a bladder for a sports ball, is provided. The valve unit comprises a cavity containing a viscous, non-solid material, the cavity being adapted to be repeatedly penetrated by a gas injector, wherein the viscous, non-solid material is adapted to seal the valve unit against gas leakage when the gas injector is not penetrating the cavity.

The present disclosure is relates to a TPU ball structure and a manufacturing method thereof. The TPU ball structure includes a ball bladder layer, a yarn layer and a surface layer. The ball bladder layer is made of TPU material. The yarn layer is made of TPU material, and the yarn layer is disposed to cover the ball bladder layer. The surface layer is made of TPU material, and the surface layer is disposed to cover the yarn layer. The above layers of the TPU ball structure are made of TPU material to satisfy a requirement for environmental protection, and are recyclable. There is no need to use adhesive to adhere the above layers of the TPU ball structure. Therefore, the peeling strength between the layers of the TPU ball structure can be increased so that the whole peeling strength of the TPU ball structure can be increased.

The present disclosure is relates to a TPU ball structure and a manufacturing method thereof. The TPU ball structure includes a ball bladder layer, a yarn layer and a surface layer. The ball bladder layer is made of TPU material. The yarn layer is made of TPU material, and the yarn layer is disposed to cover the ball bladder layer. The surface layer is made of TPU material, and the surface layer is disposed to cover the yarn layer. The above layers of the TPU ball structure are made of TPU material to satisfy a requirement for environmental protection, and are recyclable. There is no need to use adhesive to adhere the above layers of the TPU ball structure. Therefore, the peeling strength between the layers of the TPU ball structure can be increased so that the whole peeling strength of the TPU ball structure can be increased.

The present invention relates to a ball structure and method for making the same. The ball structure includes an inner bladder and a plurality of covers. The covers surround the inner bladder. Each of the covers includes a base fabric layer, a middle layer and a surface layer. The middle layer is formed from a first polyurethane (PU) solution. A PU solid content of the first PU solution is greater than 70 wt %. The middle layer is a foamed layer, and a porosity thereof is 25% to 85%. The surface layer is formed from a second polyurethane (PU) solution. A PU solid content of the second PU solution is 5 wt % to 20 wt %.

A method for manufacturing sports ball having a high-performance cover formed from a plurality of panels with foam provided internally.

A method for manufacturing sports ball having a high-performance cover formed from a plurality of panels with foam provided internally.

The present invention relates to a ball structure and method for making the same. The ball structure includes an inner bladder and a plurality of covers. The covers surround the inner bladder. Each of the covers includes a base fabric layer, a middle layer and a surface layer. The middle layer is formed form a first polyurethane (PU) solution. A PU solid content of the first PU solution is greater than 70 wt %. The middle layer is a foamed layer, and a porosity thereof is 25% to 85%. The surface layer is formed form a second polyurethane (PU) solution. A PU solid content of the second PU solution is 5 wt % to 20 wt %.

A method for manufacturing sports ball having a high-performance cover formed from a plurality of panels with foam provided internally.

The present disclosure is relates to a TPU ball structure and a manufacturing method thereof. The TPU ball structure includes a ball bladder layer, a yarn layer and a surface layer. The ball bladder layer is made of TPU material. The yarn layer is made of TPU material, and the yarn layer is disposed to cover the ball bladder layer. The surface layer is made of TPU material, and the surface layer is disposed to cover the yarn layer. The above layers of the TPU ball structure are made of TPU material to satisfy a requirement for environmental protection, and are recyclable. There is no need to use adhesive to adhere the above layers of the TPU ball structure. Therefore, the peeling strength between the layers of the TPU ball structure can be increased so that the whole peeling strength of the TPU ball structure can be increased.