| 摘要 |
PROBLEM TO BE SOLVED: To provide a large-sized septic tank which is light weight and strong against inside and outside pressures and recyclable and prevents the generation of harmful gas during incineration time by using a ring-shaped olefin crosslinked polymer and forming a curved surface on the bottom with a specified curvature. SOLUTION: An upper tank area and a lower tank area are formed by crosslinking- reacting a monomer liquid A (solution A), which comprises a metathesis polymerization ring-shaped olefin which contains a catalytic component of a metathesis polymerization catalytic system with a monomer liquid B (solution B), which contains an activator component in a mold. As an occasion demands, an uneven rib is formed on the surfaces of the upper and lower tanks while both upper and lower tanks are connected with a flange 3. The curvature radius of a curved area 8 of the bottom is formed so as to establish the following relational expression. More specifically, 0.30<=h/H<=1.00, 0.30<=h'/H<=1.00, 0.40<=(j+j')/J<=1.00, 300mmR<=H. When the left and right directions are assumed to be X and the vertical direction is assumed to be Y, the height of the transverse wall area of the tank is H while the width of the lower tank is J. The projection length of the Y axis of the curved area is hand h' and the projection length of X axis is J and J' and the curvature radius of the curved area is R. |
