Patent ID: 6395677
Filing Date: 2002-05-28
Classification: C04B,C10B,F16C,Y02E

Abstract:
A porous material suitable for use in a bearing retainer, obtained by a process comprising the steps of mixing degreased bran derived from rice bran with a thermosetting resin before kneading, subjecting a kneaded mixture to a primary firing in an inert gas at a temperature in a range of 700 to 1000Â° C., pulverizing the kneaded mixture obtained after the primary firing into carbonized powders sieved through a 60-mesh screen, mixing the carbonized powders with a thermosetting resin before kneading, pressure-forming a kneaded mixture thus obtained at a pressure in a range of 20 to 30 MPa, and applying a heat treatment again to a formed kneaded mixture in the inert gas at a temperature in a range of 100 to 1100Â° C.