What is the liquid in the glowing bouncing ball?


The liquid in the bouncy ball is a hundred TPU named th […]

The liquid in the bouncy ball is a hundred TPU named thermoplastic polyurethane elastomer rubber, this material can be softened at a certain heat, but can be kept unchanged at normal temperature.
TPU (Thermoplastic polyurethanes) name is thermoplastic polyurethane elastomer rubber. It is mainly divided into polyester type and polyether type. It has a wide hardness range (60HA-85HD), wear resistance, oil resistance, transparency, and good elasticity. It is widely used in daily necessities, sports goods, toys, decorative materials, etc. Halogen-free flame retardant TPU can also replace soft PVC to meet environmental protection requirements in more and more fields.
The so-called elastic body refers to a polymer material with a glass transition temperature lower than the chamber temperature, an elongation at break> 50%, and good recovery after removal of external force. Polyurethane elastomers are a special category of elastomers. The hardness range of polyurethane elastomers is very wide and the performance range is very wide. Therefore, polyurethane elastomers are a class of polymer materials between rubber and plastic.
It can be plasticized by heating. There is no or little cross-linking in the chemical structure. Its molecules are basically linear, but there is a certain physical cross-linking. This type of polyurethane is called TPU.