| 摘要 |
PROBLEM TO BE SOLVED: To provide a container lid which is easy to produce, excellent in fall strength, and convenient in an unsealing operation, and a production method therefor. SOLUTION: A container lid comprises a base 1 which has physical properties necessary for holding an item to be sealed into a container, a perimetral edge part on the base 1 which forms, opposite to the side where a container main body is attached, a perimeter for the container lid 5, a panel part 5 which covers, on the same side where the perimetral edge part is formed, the base portion surrounded by the perimetral edge part, and an easy-to-break score part 7 which is formed between the perimetral edge part and panel part 5, the perimetral edge part and panel part comprising resin layers formed of the same thermoplastic resin on the base 1. The substantial portion of the score part 7 is composed of the base 1. Further, in at least a portion of the score part 2, a thin film formed of a thermoplastic resin connecting the perimetral edge part and panel part is formed on the base 1. |
