Adhesive for tennis ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTakehiko Hyodo, Yuko Kujirai, Kazuyoshi Shiga
Life of this patent
Estimating the term…
Abstract
An adhesive for a tennis ball of the present disclosure includes base rubber and a filler. The base rubber contains, as a main component thereof, liquid rubber having a number average molecular weight of not less than 10,000. The filler has an average nitrogen specific surface area of not less than 40 m2/g. A tennis ball of the present disclosure 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.
Claims4
A tennis ball comprising a hollow core made of a rubber material, wherein
- the core includes two hemispherical half cores,
- the two half cores are adhered to each other by an adhesive,
- the adhesive comprises a base rubber and a filler,
- the base rubber contains, as a main component thereof, liquid rubber such that a ratio of the liquid rubber to the base rubber is not less than 99% by mass,
- the liquid rubber has a number average molecular weight of not less than 10,000,
- the liquid rubber is isoprene rubber or butadiene rubber, and
- the filler has an average nitrogen specific surface area of not less than 40 m2/g.
Dependencies are inferred from the claim text.