Search Results

Polyurethane flexible foams have been widely used for automotive seat cushions because of the cushioning performance. It has been required so far to improve the polyurethane foam’s performances such as reducing the density and improving the static, dynamic vibration properties. Additionally, improving the functional properties such as antimicrobial properties are also considered important these days. In this article, new antimicrobial polyurethane foams for automotive seat with urushiol or cardanol extracted from a natural lacquer were prepared. Influences of agent’s concentration on the reactivity between polyol and isocyanate, mechanical properties of foams were investigated. It was observed that the urethane formation reaction was delayed a little when the amount of agent was increased. However, it was found that the mechanical properties of antimicrobial foams made using agent were similar to those of the neat polyurethane foam.

In recent years, high performance engines and the reduction in engine room due to aerodynamic styling has caused increases in engine room temperature. Because of this increasing temperature, the conventional natural rubber engine mount is now at the marginal point on its performance and durability. Several heat resistant materials have been considered for engine mount applications because of this reason. Polychloroprene rubber could be a strong candidate for engine mount application due to its balance of heat resistance, dynamic properties, and fatigue life. This paper will discuss the development of the technology, property characteristics and part performance simulations on the HYUNDAI BUSH TYPE COMPLEX ENGINE MOUNT (for 2.0L DOHC ENGINE). This type of mount requires higher creep resistance and fatigue life than those of other designs, such as block or simple shear type mounts. Early evaluations of polychloroprene mounts have shown some deficiencies in creep resistance.