| 摘要 |
PROBLEM TO BE SOLVED: To enable separation or disposal of a plug as paper by molding mold resin with a composite sheet mainly comprising a paper base sheet as an insert material. SOLUTION: A plug B comprises a cylindrical ejection port 11 for ejecting liquid contents and a ring-like flange 12, wherein the ejection port 11 is applied with a lid C such as a cap by screwing or fitting to its outer or inner periphery. The plug B has a paper base sheet 21 due to composition wherein a synthetic resin layer is laminated on the paper base sheet as a main content mounted inside the plug B as an insert material, and insert-molded by using molding synthetic resin. Thus the plug B is molded of a composite material comprising the paper base sheet 21 and the molding synthetic resin, wherein in order to facilitate separation or disposal after use, a volume occupied by the paper base sheet 21 in an entire volume is preferably as large as possible to a degree that performance as a container for liquid may not be obstructed. |
