PLASTIC CAP WITH IC TAG AND METHOD OF ATTACHING IC TAG TO THE CAP

摘要

[PROBLEMS]To provide a plastic cap having an IC tag wherein transmission and reception of information to and from the IC tag are not interrupted and product information is surely inputted and outputted to and from the IC tag.[MEANS FOR SOLVING PROBLEMS]An upper surface of a top panel (21) of a plastic cap is provided with an IC tag (10) wherein product information is stored. The top panel (21) is composed of an annular flange section (35) and a recessed section (37). The recessed section (37) is composed of a side wall section (37a) continuous to the inner circumference end of the annular flange section (35), and a bottom section (37b) continuous to the lower end of the side wall section (37a). The IC tag (10) is attached to the annular flange section (35) to cover the recessed section (37). A gap between the IC tag (10) and the bottom section (37b) is maintained as a gap by which signal transmission and reception to and from the IC tag (10) is not interrupted when the bottom surface of the bottom section (37b) is brought into contact with water.