| 摘要 |
PURPOSE:To prevent the lowering of buoyance and damage of a float caused by the sticking of seaweeds of the like in the float for a raft for breeding sea living things by coating the edge of the float with a bag-like shrinkage films and shrinking them by heating and in the next step coating the center of the float with cylindrical heat shrinkage films and shrinking them by heating. CONSTITUTION:Both ends of cylindrical float 1 are covered by baglike thermal shrinkage films 2, and the films 2 are heated and shrunk, as a result, both ends of the floating 1 are tightly coated by the films 2. In the next step the center section or center section and end sections of the float 1 are covered by cylindrical bag-like thermal shrinkage films 3, and the films 3 are heated and shrunk to tightly seal the bag-like films 2 and the float 1. These films 2 and 3 are made of polyethylene or the like. In addition, to these films 2 and 3 disinfectant, mildewproofing agent, paraffin, wax, etc. are added or applied for preventing from sticking of living things such as seaweeds, barnacles, or the like. This constitution can protect and prevent the float from being stuck by seaweeds or the like. |
