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US 12,344,770 B2Granted
Adhesive for tennis ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTakehiko Hyodo, Yuko Kujirai, Kazuyoshi Shiga
Life of this patent
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Abstract
An adhesive for a tennis ball includes base rubber. The base rubber contains, as a main component thereof, liquid rubber having a number average molecular weight of not less than 10,000. The adhesive has a shear viscosity of not greater than 2,000 Pa·s. A tennis ball includes a hollow core made of a rubber material. The core includes two hemispherical half cores. The two half cores are adhered to each other by using the adhesive for a tennis ball.
Claims5
A tennis ball comprising a hollow core made of a rubber material, wherein
- the core includes two hemispherical half cores, and
- the two half cores are adhered to each other by using an adhesive,
- the adhesive comprises a base rubber containing, as a main component thereof, a liquid rubber having a number average molecular weight of not less than 10,000,
- the ratio of the liquid rubber to the base rubber is not less than 90% by mass, and
- the adhesive has a shear viscosity of not less than 80 Pa·s and not greater than 2,000 Pa·s.
2 more elements
Dependencies are inferred from the claim text.