| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a water-repellant surface which is made of a fluororesin resin and, not only has a dynamic contact angle for water of greater than 160 deg., but also is almost free from deterioration with time, without using a complicated process except roughening the surface. SOLUTION: This article having a water-repellant surface has a surface which is made of a fluorocarbon resin and has projections in a fine fiber form ranging from 10 to 30μm in length and from 1 to 10μm in thickness in a number of 1 or more per (100μm)<2> . The surface of this article has a dynamic contact angle for water of 160 deg. or more. A method for preparing this article comprises grinding the surface of the article made of a fluorocarbon resin with a grinding surface of a grinder provided with an abrasive having a particle size of No.100 to No.800. The abrasive is, for example, selected from among an alumina-based material, a silicon carbide-based material, emery, garnet and silica.
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