METHOD OF FABRICATING POLYURETHANE FOAM WITH MICROPORES AND POLISHING PAD MANUFACTURED THEREFROM

摘要

PURPOSE: A method of fabricating polyurethane foam with micropores and a polishing pad are provided to suppress the generation of scratches on the foam due to pores formed inside the foam, to facilitate the generation of the pores in the foam with a uniform size and spatial distribution, and to help to simplify the whole processes, thereby reducing the fabrication expenses and increasing the process reliability with improved productivity. CONSTITUTION: The method of fabricating a polyurethane foam with micropores comprises the steps of: (a) adding a non-ionic surfactant into at least one of a first ingredient including an isocyanate group-containing compound and a second ingredient including an active hydrogen group-containing compound; (b) agitating and mixing the mixture of the first ingredient and the second ingredient while adding a non-reactive gas thereto; (c) discharging the mixture out of a container at a predetermined rate; and (d) injecting the discharged mixture into a mold so as to form into a predetermined shape. The polishing pad made of the polyurethane foam with micropores has a density of 0.5-1.0 g/cm¬3 and a shore D hardness of 50-70.