
Microcellular polyurethane foam is flexible, open cell, and closed cell urethane foam that is very economical and has excellent resistance to compression set. The foam has good cushioning, sealing, and vibration control due to very low compression properties. Also, the open cell structure allows gas and vapors to pass through the material. It can also be formulated to form an integral skin, as it is mechanically mixed, and hence the cell size is more uniform. Automotive application accounts for the largest share of the global microcellular polyurethane foam market due to its use in cushioning purposes, as well as in bodies of the car, where their insulation properties provide protection against heat and noise of the engine.