Polishing tool and polishing apparatus

摘要

A polishing tool is used for polishing a workpiece in a state such that the workpiece is pressed against and brought into sliding contact with the polishing tool. The polishing tool is formed of thermoplastic resin having an average glass transition temperature (Tg) ranging from 270 K to 400 K. The thermoplastic resin includes a first phase having a low glass transition temperature (Tg) of 320 K or lower within a range of from 10 weight % to 90 weight %, and a second phase having a high glass transition temperature (Tg) of 320 K or higher within a range of from 90 weight % to 10 weight %.