MANUFACTURE OF LIGHT-WEIGHT HIGH-RIGIDITY NATURAL FIBER- REINFORCED POLYURETHANE/POLYUREA MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a light-weight high-rigidity molding reinforced by a natural fiber exhibiting high rigidity and excellent design properties even by incorporating a very light weight. SOLUTION: The method for manufacturing a polyurethane/polyurea molding having a low weight per unit area and high rigidity comprises a step of coating a surface of a natural fiber mat with a polyol mixed with 10 to 70 wt.% of water and a polyisocyanate, and a step of thermoforming a coated natural fiber mat in a mold heated at 50 to 160 deg.C.