| 摘要 |
<p>A porous phenol resin grindstone (10) having a phenol resin binder (14) and abrasive grains (12) connected with one another by the resin, characterized in that the phenol resin binder (14) has a three-dimensional network structure and an extremely large number of fine through pores (16) having a diameter less than that of the abrasive grain. The grindstone (10) has a high porosity and is prone to have protrusions of abrasive grains on its abrasive surface, due to the three-dimensional network structure of the phenol resin binder, and thus exhibits excellent grinding characteristics. Further, the abrasive grain (12) being held in the phenol resin binder (14) of three-dimensional network structure having the above fine through pores (16) drops out by a relatively week force and thus is less prone to damage the surface of the material to be abraded.</p> |
