Claims
- 1. A polishing cloth comprising a nonwoven cloth comprising 100% polyvinyl alcohol filaments which is bonded with microporous aromatic polysulfone resin, characterized in that:
- the nonwoven cloth is first impregnated with an aromatic polysulfone resinous solution prepared by dissolving aromatic polysulfone resin in an organic solvent;
- the nonwoven cloth impregnated with the aromatic polysulfone resinous solution is subsequently immersed in a nonsolvent so as to coagulate the aromatic polysulfone resinous solution; and
- the nonwoven cloth is finally washed with water and dried.
- 2. A polishing cloth comprising a nonwoven cloth comprising 100% polyvinyl alcohol filaments which is bonded with a microporous resinous mixture of aromatic polysulfone resin and polyurethane resin, characterized in that:
- the nonwoven cloth is first impregnated with a mixed resinous solution prepared by dissolving aromatic polysulfone resin and polyurethane resin in an organic solvent;
- the nonwoven cloth impregnated with the mixed resinous solution is subsequently immersed in a nonsolvent so as to coagulate the mixed resinous solution; and
- the nonwoven cloth is finally washed with water and dried.
REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of application, Ser. No. 08/148,312, filed Nov. 8, 1993, now abandoned.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
148312 |
Nov 1993 |
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