Method of producing polishing cloth

Details Method of producing polishing cloth Method of producing polishing cloth

2007-09-11

2007-09-11

Eley, Timothy V. (Department: 3724)

Abrading

Abrading process

C428S116000, C428S136000, C451S533000, C451S527000

Reexamination Certificate

active

11501493

ABSTRACT:
A polishing cloth to be produced has a surface layer stacked over a base material. The surface layer is made of a foamed layer and a non-foamed layer, the foamed layer including air bubble cells and the non-foamed layer having an externally exposed surface where linear cuts are formed. These linear cuts reach the air bubble cells such that the air bubble cells communicate with the exterior through the linear cuts. These linear cuts are controlled to be 10 μm or less in length. Such a polishing cloth is produced by applying a foamable coating material such as a foamable resin over a surface of the base material, foaming the foamable coating material to form the surface layer, and forming the linear cuts through the non-foamed layer.

REFERENCES:
patent: 3137611 (1964-06-01), Krolik, Jr.
patent: 3707401 (1972-12-01), Jarema et al.
patent: 3976525 (1976-08-01), Mednick
patent: 3983287 (1976-09-01), Goossen et al.
patent: 4714644 (1987-12-01), Rich
patent: 6929538 (2005-08-01), Schutz
patent: 6929539 (2005-08-01), Schutz et al.
patent: 2003/0150169 (2003-08-01), Annen

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