PMI foam is mostly used as a composite sandwich material and has been successfully introduced into many applications. There are currently 154 composite sandwich applications in the fields of radome, stealth, train, ship, automotive and aerospace. , medical, sporting goods. PMI foam composite products are growing rapidly in the global market. Since the 1970s, PMI foam has been used in many aerospace and aerospace vehicles, including McDonnell Douglas MD11 flap deflectors, inlets; Westland Helicopter's "Bobcat", "Sea King" main and tail rotors; Airbus A320 spoiler, A340/500/600/380 aircraft cabin airtight partition; Eurocopter EC135, NH90 main tail rotor; Boeing The RAH-66 "Comanche" rotor developed by the company and Sikorsky. In space, PMI foam has been applied to the load section fairings, interstages, intermediates, heat shields and pusher nose cone structures of the Deltal launch vehicle.

        The superior performance of PMI foam makes it one of the ideal lightweight materials in materials science. Combining PMI foam with other materials and processing techniques is conducive to the lightweight development of automobiles. With the continuous development and maturity of materials lightweight technology, including design, production process, assembly, connection and material properties, the future multi-material lightweight structure based on composite materials is the development trend of automotive lightweight and automotive exterior parts materials.Through the combination and complement of different materials, structures and manufacturing processes, the modularity of design and manufacturing can be easily and conveniently achieved to achieve the best combination of materials and parts. At present, the lightweight technology of automobiles is still in an immature stage, and there will be a lot of room for development in the future.
        From the current use, about 80% of PMI foam products are used in the aerospace industry, about 15% for transportation, and about 5% for other areas.