Patent ID: 8500932
Filing Date: 2013-08-06
Classification: B24B,B24D,B29C,C08J,Y10T

Abstract:
1. A method for manufacturing a polishing pad, comprising the steps of: preparing a cell-dispersed urethane composition by a mechanical foaming method; feeding a face material in a feeding direction; while feeding the face material, feeding in the feeding direction a first spacer on the face material so as to be at one end of a width direction of the face material, feeding in the feeding direction a second spacer on the face material so as to be at other end of the width direction of the face material, and feeding in the feeding direction a third spacer on the face material so as to be between the first and second spacers; continuously discharging said cell-dispersed urethane composition onto a part of said face material where the spacers are not provided; laminating another face material on said discharged cell-dispersed urethane composition; curing the cell-dispersed urethane composition, while controlling its thickness to be uniform, so that a long polishing layer comprising a polyurethane foam is formed; and cutting the long polishing layer.