| 摘要 |
A grinding wheel comprising an outer annular grinding portion, and an inner core portion which is located radially inwardly of the annular grinding portion to support the annular grinding portion and which is formed of a composition including as a major component a thermoplastic resin having a specific tensile strength of at least 12. The grinding wheel is manufactured in a process including a step of crushing the core portion of the used grinding wheel into pellets to be reclaimed as a material for the core portion, a step of preparing a composition for the core portion, which includes a mass of the pellets and a fresh thermoplastic resin having a specific tensile strength of at least 12, and a step of forming the core portion by using the composition in a molten state. The process may further include a step of reclaiming the grinding portion of the used grinding wheel.
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