| 摘要 |
PROBLEM TO BE SOLVED: To ensure the improvement of workability and the reduction of cost and at the same time, inhibit the worsening of a visual quality when manufacturing resin moldings. SOLUTION: A year spoiler 11 is of a hollow form and is structured of three layers such as an outer layer part 12, an inner layer part 13 and an innermost layer part 14. The outer layer part 12 and the inner layer part 13 are made of high crystalline polypropylene, and the outer layer part 12 is colorless and transparent, while the inner layer part 13 is previously colored in an earlier molding stage. The innermost layer 14 is constructed of polypropylene including a filler, and the rear spoiler 11 is manufactured by a blow molding method. The colored part of the inner layer part 13 is easily recognized visually without depending upon a polishing step and a coating step. When performing a blow- molding process, an unevenness on the surface of the outer layer part 12, if any is hardly conspicuous as the outer layer part 12 is transparent. In addition, the outer layer part 12, if exposed to light, does not receive color degradation easily. Consequently, the outstanding visual quality can be maintained for a long time. |
