Adhesive for tennis ball
US-2020109318-A1 · Apr 9, 2020 · US
Adhesive for tennis ball
US12344770B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12344770-B2 |
| Application number | US-202217849436-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 24, 2022 |
| Priority date | Jul 14, 2021 |
| Publication date | Jul 1, 2025 |
| Grant date | Jul 1, 2025 |
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- Title
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- Abstract
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Abstract
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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.
First claim
Opening claim text (preview).
What is claimed is: 1. 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. The tennis ball according to claim 1 , wherein the liquid rubber is isoprene rubber or butadiene rubber. 3. The tennis ball according to claim 2 , wherein the adhesive further comprises a vulcanization accelerator, and an amount of the vulcanization accelerator in the adhesive is not less than 1.5 parts by mass and not greater than 5.0 parts by mass with respect to 100 parts by mass of the base rubber. 4. The tennis ball according to claim 1 , wherein the adhesive further comprises a vulcanization accelerator, and an amount of the vulcanization accelerator in the adhesive is not less than 1.5 parts by mass and not greater than 5.0 parts by mass with respect to 100 parts by mass of the base rubber. 5. The tennis ball according to claim 1 , wherein the liquid rubber has a number average molecular weight of not less than 10,000 and not more than 60,000.
Assignees
Inventors
Classifications
Hollow non-inflatable balls {, i.e. having no valves (rigid balls A63B37/00)} · CPC title
Tennis · CPC title
Additives containing two or more different additives of the same subgroup in C08K · CPC title
Additives being defined by their particle size in general · CPC title
Aluminium · CPC title
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Frequently asked questions
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- What does patent US12344770B2 cover?
- 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 …
- Who is the assignee on this patent?
- Sumitomo Rubber Ind
- What technology area does this patent fall under?
- Primary CPC classification C09J109/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 01 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).