On June 6, 2026, information from the China National Intellectual Property Administration showed that Shandong Yinuowei Polyurethane Co., Ltd. applied for an electromagnetic protection project named "Flexible Robot Joint"
TPUThe patent for composite materials and their preparation methods and applications, with authorization announcement number CN121801298B, was granted on June 5, 2026. The application publication number is CN121801298A, the application number is CN202610297180.7, the application publication date is June 5, 2026, and the application date is March 12, 2026. The inventors are Wang Zhen, Liu Yu, Hu Yinan, Chen Hailiang, Xu Yanyan, You Zhengwei, and Li Yingqian.
The patent abstract shows that the present invention discloses an electromagnetic protection TPU composite material for flexible robot joints, its preparation method and application, which belongs to the field of polymer material technology. The technical solution is: the composite material is composed of the following mass percentages: polyester TPU matrix, graphene oxide, carboxylated multi walled carbon nanotubes, iron oxide, and urea; The preparation method includes the following steps: dispersing graphene oxide, carboxylated multi walled carbon nanotubes, and urea in water to form a uniform slurry; The slurry is unidirectionally frozen and freeze-dried to obtain a three-dimensional porous air gel preform; Immersion in ferric salt ethanol solution to obtain saturated aerogel; Transfer the saturated aerogel to a high-pressure reaction vessel for solvothermal reaction; Wash, freeze dry, and obtain a three-dimensional network architecture; Polyester TPU matrix solution impregnation; Curing and hot pressing to obtain TPU composite material. The electromagnetic protection TPU composite material of the present invention can achieve precise construction of filler network and strong interface bonding.
