Table tennis ball and table tennis ball-use thermoplastic resin composition
US9623288B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 16, 2014 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Apr 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A table tennis ball faithfully reproduces the playing characteristics of celluloid table tennis balls without using celluloid, and a thermoplastic resin composition for table tennis balls provides a table tennis ball having an excellent balance of elastic modulus, impact resistance, and density. The table tennis ball is composed of a celluloid-free thermoplastic resin or thermoplastic resin composition having a flexural modulus according to ISO 178 of 1650 MPa or more, a Charpy impact strength according to ISO 179 of 20 kJ/m2 or more, and a density according to ISO 1183 of less than 1.20 g/cm3, has a diameter of 39.0 mm or more, and weighs 2.0 to 3.5 g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.