Patent ID: 8003203

Claim:
A resinous oil-retaining article comprising: a resinous porous article having interconnected holes which are open to a surface of said resinous porous article; and a lubricating oil impregnated into said resinous porous article, wherein said interconnected holes are formed by molding a resin containing a pore-forming substance that is an alkali compound at a mixing amount of said pore-forming substance of not more than 40 vol % based on the total volume of said resin and said pore-forming substance into a molding and extracting a part of said pore-forming substance from said molding with a solvent which dissolves said pore-forming substance and does not dissolve said resin, wherein an interconnected hole porosity of said resinous porous article is not more than 30% wherein a part of said pore-forming substance remains in said resinous oil-retaining article.