To provide a plastic container enabling the properties of plastic, which permeate low-molecular gas such as oxygen, carbon dioxide and steam, to be reliably reduced by covering the plastic container with a thin film, and forming thereon a thin film which causes no deterioration in barrier properties even in the case where contents are brought into direct contact with the plastic container and are subjected to retorting treatment or the like.
A plastic base material 1 of the plastic container is covered with silicon compound vapor-deposited thin film layers, and at least the outermost face layer of the vapor-deposited layers consists of a silicon compound vapor-deposited thin film layer 2 mainly composed of silicon carbide or silicon nitride. For example, the plastic base material 1 is covered with a silicon compound vapor-deposited thin film layer 3 mainly composed of silicon oxide, and an upper face of the thin film layer 3 is covered with the silicon compound vapor-deposited thin film layer 2, as the outermost layer which is mainly composed of silicon carbide or silicon nitride.
KAKEMURA TOSHIAKI
KASHIMA HIROTO
TSUJINO MANABU
| JPH0872193A | 1996-03-19 |