Hole-blocking adhesive sheet

Abstract

This article is a hole-closing adhesive sheet used when closing a piping hole. As shown in the reference enlarged plan view, this article has an aluminum sheet adhered to one side of a polyethylene foam layer, and a removable release sheet adhered to the other side via an adhesive layer. As shown in the reference front view, this article has a cut groove indicated by a solid line cut from one side to the other side, and a plurality of arc-shaped folding grooves indicated by broken lines formed on one side. When closing a piping hole, as shown in the reference front view showing a state in which the piping hole is separated along the cut groove, a user separates the piping hole into two closing members and two belt-shaped winding members by cutting the piping hole along the cut groove in advance. Next, the user folds the folding grooves of the two separated closing members toward one side at approximately 90 degrees to form six flap pieces. At this time, among the plurality of arc-shaped folding grooves, the folding groove corresponding to the outer diameter of the piping material penetrating the piping hole is folded. The user removes the release sheets of the two blocking members, respectively, to expose the adhesive layer. As shown in the reference perspective view 1 showing the usage state, the user adheres the two blocking members to the ceiling surface from the floor below using the adhesive layer so as to surround the piping material without any gaps. At this time, each flap piece bent at 90 degrees is adhered to the outer peripheral surface of the piping material with a circumferential gap. Next, the user removes the release sheets of the two winding members, respectively, to expose the adhesive layer. As shown in the reference perspective view 2 showing the usage state, the user can reinforce the piping material and the two blocking members so that no gaps are generated between them by wrapping the two winding members around the outer peripheral surface of the piping material so that they overlap with each flap piece. Finally, as shown in the reference cross-sectional view showing the usage state, the user can block the piping hole from the floor above by filling the piping hole with mortar.

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