Patent ID: 8398794
Filing Date: 2013-03-19
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; continuously or intermittently discharging a light transmitting region-forming material onto a prescribed site of a face material, while feeding the face material; continuously discharging said cell-dispersed urethane composition onto a part of said face material where the light transmitting region-forming material is not provided; laminating another face material on said discharged light transmitting region-forming material and cell-dispersed urethane composition; curing the light transmitting region-forming material and the cell-dispersed urethane composition, while controlling their thickness to be uniform, so that a long polishing layer comprising a light transmitting region and a polishing region integrated therewith is formed; and cutting the long polishing layer.