Ball structure and method for making the same
AssigneeSan Fang Chemical Industry Co., Ltd.
InventorsCHUNG-CHIH FENG, CHUN-WEI WU, YONG-SONG LIN
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Abstract
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 %.
Claims10
A ball structure, comprising:
- an inner bladder;
- and
- a plurality of covers surrounding the inner bladder, wherein each of the covers comprises:
- a base fabric layer having a thickness of approximately 0.5 mm to 3 mm;
- a middle layer formed form a first polyurethane (PU) solution, wherein a PU solid content of the first PU solution is greater than 70 wt %, a thickness of the middle layer is approximately 2 mm to 5 mm, the middle layer is a foamed layer, and a porosity thereof is 25% to 85%;
- and
- a surface layer formed form a second polyurethane (PU) solution, wherein a PU solid content of the second PU solution is 5 wt % to 20 wt %, the middle layer is located between the surface layer and the base fabric layer, and a thickness of the surface layer is approximately 0.02 mm to 0.2 mm.
A method for making a ball structure, comprising:
- (a) providing an inner bladder and a middle bladder, wherein the middle bladder covers the inner bladder;
- (b) providing a plurality of covers, wherein each of the covers includes a base fabric layer, a middle layer a surface layer, the base fabric layer has a thickness of approximately 0.5 mm to 3 mm, 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 %, a thickness of the middle layer is approximately 2 mm to 5 mm, 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 %, the middle layer is located between the surface layer and the base fabric layer, and a thickness of the surface layer is approximately 0.02 mm to 0.2 mm;
- and
- (c) attaching the base fabric layers of the covers to the middle bladder.
A method for making a ball structure, comprising:
- (a) providing a plurality of covers, wherein each of the covers includes a base fabric layer, a middle layer a surface layer, the base fabric layer has a thickness of approximately 0.5 mm to 3 mm, 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 %, a thickness of the middle layer is approximately 2 mm to 5 mm, 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 %, the middle layer is located between the surface layer and the base fabric layer, and a thickness of the surface layer is approximately 0.02 mm to 0.2 mm, wherein the surface layer includes a first surface that is far away from the base fabric layer;
- (b) attaching the first surfaces of the surface layers of adjacent covers to each other at a peripheral edge of the covers to form an outer skin structure;
- (c) reversing the outer skin structure from the inside to the outside, so that the first surface of the surface layer faces outward, wherein the outer skin structure substantially forms a ball shape structure, and includes a notch;
- (d) placing an inner bladder in the outer skin structure through the notch;
- and
- (e) attaching at least one cover to the inner bladder that is exposed by the notch.
Dependencies are inferred from the claim text.