The sandwich structure of high - performance fibers and foam core materials has brought a major revolution in sports equipment. PMI foam is easy to process and can be formed into complex geometric shapes through heat - forming or CNC machining to meet the mass production requirements of sports equipment. Compared with traditional wooden and alloy materials, the composite structure of high - performance fibers and PMI foam core materials can achieve lightweight yet high strength. The PMI foam core layer can provide high impact resistance, making it very suitable for wheels, rackets, bats, snowboards, surfboard, etc., and helping to improve the performance of sports equipment and the experience of athletes.