| abstract |
This polylactic acid molding comprises a polylactic acid base material (1) and a hydrocarbon-based deposited film (3) formed on the surface of the base material by plasma CVD, wherein the polylactic acid base material (1) exhibits a sharp X-ray diffraction peak having a peak half-width of 1.22° or less appearing at 10-25° in wide-angle X-ray measurement, and the hydrocarbon-based deposited film (3) includes two layers, namely, a high-CH 2 layer (3a) formed on the surface of the polylactic acid base material (1) and designed so that the CH 2 ratio relative to the total of CH, CH 2 , and CH 3 is 40% or higher, and a low-CH 2 layer (3b) formed on the high-CH 2 layer (3a) and designed so that the CH 2 ratio relative to the total of CH, CH 2 , and CH 3 is 35% or lower. With this polylactic acid molding, a hydrocarbon-based deposited film exhibiting high adhesiveness to a polylactic acid base material is formed without producing thermal deformation or thermal degradation of the polylactic acid base material by a continuous series of plasma CVD steps in which there is no switching of the reaction gas. |