The application discloses a composite sports protector foaming material and a preparation method thereof. The material is prepared from polyether or
polyester polyol, polyisocyanate as a base
raw material, a composite catalyst, a
foaming agent, a bubble uniformizing agent, an
antibacterial agent and a TPU film reinforcing phase; the PU base has a gradient
cell structure with density gradually changing from a
surface layer to a bottom layer, the
surface layer has a
cell diameter of 50-100 microns, the middle layer has a
cell diameter of 150-300 microns, and the bottom layer has a
cell diameter of 100-200 microns; and a TPU film three-dimensional network reinforcing layer with a thickness of 20-50 microns and a spacing of 0.5-1.2 mm is embedded in the material. The material has the advantages of light weight, high
impact resistance, high rebound, good wearing comfort, stable structure, long service life, and the like, is suitable for sports protectors such as knee protectors,
elbow protectors and shoulder protectors in high-
impact scenes such as basketball, football and extreme sports, and the process is controllable and suitable for industrial production.