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    • 7. 发明专利
    • FLOATING LID USED IN CONTAINER
    • JPH11301785A
    • 1999-11-02
    • JP15350098
    • 1998-04-24
    • KONISHI CO LTD
    • KOBAYASHI TOSHIKATSUARIAKE SUMIOMIYAJIMA AKIRA
    • B65D90/42
    • PROBLEM TO BE SOLVED: To bring buoyancy to a floating lid and also to smoothly discharge air residing on a lower layer by laminating the lower layer comprising a water absorbing material and an upper layer comprising a non-water-absorbing material including buoyancy and exposing a whole or a part of a side wall when the lower layer absorbs water. SOLUTION: Since a lower layer 11 of the floating lid 10 is formed of a water absorbing material, it attempts to absorb moisture in a liquid-like substance when in contact with a surface of the substance. Even after the lower layer 11 completes absorbing moisture and has been soaked in the liquid-like substance, since an upper layer 12 of the floating lid 10 is constituted of a non-water-absorbing material including buoyancy, the upper layer 12 itself does not absorb the liquid-like substance but floats on its surface, thereby preventing the entire floating lid 10 from sinking in the liquid-like substance. Since a whole or a part of a side face of the floating lid 10 is exposed, absorption of water of the layer 11 and discharge of air residing inside can be simultaneously and smoothly done until water absorption of the lower layer 11 is completed.