Rubber Member, Tire, and Method of Manufacturing Rubber Member

Abstract

A vehicle tire, as a rubber member, includes, on at least a part of the surface thereof, a fine ridged/grooved structure formed via transfer from a mold and having fine ridged/grooved portions arranged at a constant arrangement pitch, wherein a region in which the fine ridged/grooved structure is provided is visually recognizable by a different structural color from the colors of other regions.

1 . A tire made of a rubber member comprising: a fine ridged/grooved structure on at least a part of a surface of the rubber member, the fine ridged/grooved structure formed via transfer from a mold and having fine ridged/grooved portions arranged at a constant arrangement pitch;
 a region in which the fine ridged/grooved structure is provided being visually recognizable by a structural color different from colors of other regions.   
     
     
         2 . The tire according to  claim 1 , wherein
 the fine ridged/grooved structure is formed on a sidewall portion of the tire, and   the region in which the fine ridged/grooved structure is provided is formed in a shape to display predetermined information.   
     
     
         3 . The tire according to  claim 2 , wherein
 the sidewall portion contains a diene rubber, a carbon black, and a silica, and   the diene rubber contains from 30 to 70 mass % of natural rubber and/or isoprene rubber, a nitrogen adsorption specific surface area of the carbon black is from 20 to 60 m 2 /g, a content of the carbon black is from 5 to 45 parts by mass per 100 parts by mass of the diene rubber, a content of the silica is from 15 to 55 parts by mass per 100 parts by mass of the diene rubber, and a total content of the carbon black and the silica is from 30 to 60 parts by mass per 100 parts by mass of the diene rubber.   
     
     
         4 . The tire according to  claim 1 , wherein
 the arrangement pitch or ridge/groove height of the fine ridged/grooved portions is determined based on a wavelength of visible light, the wavelength corresponding to a color visually recognizable as the structural color, and   the arrangement pitch or ridge/groove height of the fine ridged/grooved portions is equal to or smaller than 650 nm.