ARTICLE HAVING WATER-REPELLENT FLUORORESIN SURFACE AND PROCESS FOR PRODUCING THE SAME

摘要

A highly water-repellent article having a water-repellent fluororesin surface which has a tangential value of the water droplet roll angle of 50/500 or less and comprises an amorphous porous substance having a maximum IPA dispersion diameter of 8mm or above and formed by superposing fluororesin particles having a mean diameter of 40 mu m or less. This article is produced by: (1) fusing fluororesin particles with one another by heating the particles in contact with one another at a temperature above the melting start temperature of the resin but below the melting termination temperature thereof, each determined by differential scanning calorimetry, (2) coating an article with a dispersion of the fluororesin particles and drying the coated article below the melting start temperature of the resin as determined by DSC to thereby fix the particles onto the surface of the article in a non-molten state, and (3) coating the article with a dispersion of the fluororesin particles and a film-forming aid and drying the coated article below the melting start temperature of the resin as determined by DSC to thereby bond the particles to the surface of the article with the use of the film-forming aid. $$