| abstract |
(57) [Summary] [Structure] A large-scale septic tank composed of an upper tank part and a lower tank part, or an upper tank part, a lower tank part and an intermediate tank part of a plate-like belt connecting them. The large-scale septic tank (1) at least the upper tank portion and the lower tank portion are crosslinked polymer molded products of a metathesis-polymerizable cyclic olefin, (2) The upper tank part and the lower tank part, or the upper tank part, the intermediate tank part, and the lower tank part have a structure such that they are joined via a flange provided at a portion to be joined to each other, and (3 ) The large septic tank is characterized in that the flanges of each structure are fixed and assembled using fasteners and polyurethane adhesives. [Effect] The large-sized septic tank according to the present invention is easy to mold, lightweight, strong against impact, sufficiently resistant to internal and external pressures, durable, easy to assemble, and recyclable. is there. |