Multi-layered preform and bottle

摘要

The multi-layered preform comprises a mouth portion, a body portion and a bottom portion and has at least the body portion and the bottom portion formed of an inner layer, an intermediate layer, and an outer layer by a compression molding, wherein, at the center of the bottom portion, a half-width of a diffuse scattering peak by an X-ray diffraction of a surface of the outer layer is larger than a half-width of a diffuse scattering peak by an X-ray diffraction of a surface of the inner layer. The multi-layered bottle is manufactured by performing a biaxial stretch blow molding of the above-mentioned multi-layered preform. The multi-layered bottle includes a mouth portion, a shoulder portion, a body portion and a bottom portion, at least the shoulder portion, the body portion and the bottom portion include an inner layer, an intermediate layer and an outer layer, and, at the center of the bottom portion, a half-width of a diffuse scattering peak by an X-ray diffraction of a surface of the outer layer is larger than a half-width of a diffuse scattering peak by an X-ray diffraction of a surface of the inner layer.