컵 발포시험을 이용한 폴리우레탄 반응사출성형의 발포 특성에 관한 연구

A Study on Foaming Characteristics of Polyurethane Reaction Injection Molding using Cup Foam Test

Polyurethane has been one of the most important materials for automobile elastic parts such as bumper, head rest, instrument panel and so on since it covers very wide range of mechanical characteristics with low production costs. The process variables such as formulation of ingredients and mold temperature, mixing speed, etc. can affect the quality of produced polyurethane foams so that process conditions should be determined appropriately. In this study, foaming behaviors of semi-rigid polyurethane were investigated by conducting cup foam tests with 2 major process variables such as environmental temperature and blowing agent content.