| 摘要 |
PROBLEM TO BE SOLVED: To uniformly polish a base material surface without giving a large flaw to the base material surface, and increase a grinding quantity by constituting a polishing sheet out of nonwoven fabric containing fiber entangled by fibrillation. SOLUTION: Fibrillated fiber is contained, and since retainability of a fine polishing particle is excellent, a base material surface is uniformly polished, and a fine texture can be formed. Since the fibrillated fiber is entangled, fiber is fixed so as to have a certain degree of flexibility, and since the polishing particle is not forcibly pressed to the base material surface, a large flaw is hardly given to the base material surface. Since the fibrillator fiber is entangled, flexibility of the fiber is restrained more than when fiber having a fiber diameter not more than 10μm is used, and since the polishing particle can be firmly pressed to the base material surface, a polishing sheet having a large grinding quantity can be formed.
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