Container closure

A container closure for closing an opening of a container body, comprising:

• a substrate having adequate property for retaining an object which is enclosed in a container body, one side of said substrate being attachable to a container body, and wherein said substrate includes a heat-fusible plastic layer;
• a peripheral section covering a periphery area of said substrate on the opposite side of the side of said substrate being attachable to a container body;
• a panel section covering an area of said substrate which is surrounded by said peripheral section and on the side having said peripheral section;
• and
• a score section formed between said peripheral section and said panel section to provide a weakened region,
• wherein said peripheral section and said panel section are formed of a heat-fusible plastic material which is the same heat-fusible plastic material on said substrate,
• wherein a portion of said score section includes a thin layer which has a thickness which is less than a thickness of said peripheral section and said panel section, and wherein said thin layer connects said peripheral section and said panel section, and wherein said thin layer is formed of a heat-fusible material which is the same heat-fusible plastic material as said peripheral section and said panel section,
• wherein a pulling tab is integrally molded with said panel section, for separating said panel section from said peripheral section along said score section.