MDI (Methylene Diphenyl Diisocyanate) is a key ingredient in the production of rebonded foam, a type of flexible polyurethane foam used in applications such as carpet underlay, sports mats, and acoustic insulation. MDI serves as the primary isocyanate component, reacting with polyols and other additives to create a durable and resilient foam material.. Rebonded foam made with MDI offers enhanced cushioning, sound absorption, and thermal insulation properties, making it ideal for a wide range of applications in the construction and automotive industries.