| 摘要 |
PURPOSE: To enhance scratch resistance by forming grained pattern rise parts having roundish surfaces on an entire surface and mutually separating a predetermined number of grained pattern rise parts by grained pattern trough parts and specifying the average rough depth of grained patterns. CONSTITUTION: A surface grain pattern is formed so that grained pattern rise parts 1 having roundish surface are provided on an entire surface and these grain pattern rise parts 1 are mutually separated perfectly by grained pattern trough parts 2. 13-25 grained pattern rise parts 1 are present within a 10 mm- interval and the average rough depth of the grained pattern is 42-58μm. The grained pattern can be adapted to the entire surface of an article requiring matte appearance from an aesthetic or practical reason. Further, the grained pattern is used in an article comprising reinforced polyolefin. For example, reinforced polypropylene used in a car corresponds to this. If the grained pattern is applied to the necessary part of a female mold in a blow mold or a compression mold, the grained pattern can be simply applied to the surface of a molded product. |
