Plastic raw materials

Plastic raw material is a kind of polymer, also known as polymer or macromolecule, which is also commonly known as plastic or resin. The so-called plastic raw material is actually a kind of [synthetic resin]. Its shape is similar to that of [pine resin] in natural resin, but it is called plastic because it is synthesized by chemical force.

This polymer is composed of many small molecules with small and simple structure, which are combined by covalent bonds. There are many kinds of polymers. Prajna is classified by the change of heat. It can be divided into two categories.