Characteristics of PU Foam at Long Term Static and Dynamic Loading

摘要

Characteristics of cushions made of PU foam together with coats define the comfort of automobile seats. The frame of a car seat with a cushion of the PU foam and cover serve as a body rest. They also meet safety rules, which are put on the car seat. The cushion in the car seat is basically manufactured of PU foam. Experimental testing of its properties investigates the correlation between its characteristic and comfort. One type of experiment is the combination of a static and a dynamic loading in medium time interval. The subject of the research and the contents of this paper is recognition of transmission characteristics and contact pressures of cushions of PU foam in time interval of two hours under static and dynamical weight constant loading.