POLYURETHANE RESIN MANHOLE

摘要

PROBLEM TO BE SOLVED: To provide a manhole capable of adhering and joining a connecting part for the inflow and outflow to a manhole body at execution work site. SOLUTION: This polyurethane resin manhole M is molded by a reaction injection molding method by using a main raw material by mixing polyol and polyisocyanate in the weight ratio in a range of 50/50 to 55/45.