The essence to tell from the Plastic and the rubber are that the plastic is fixed formed, the rubber flexible formed when the plastic metamorphose. In the other words, the formed plastic is hard to come back to the previous one, but the rubber is easier. The flexible of the Plastic is little. It is subter-100%.And the rubber can reach 1000% even more. The plastic products had been made, when the Plastic forming procedure finished; the rubber which is after formed procedure should be take into the vulcanization producing procedure.

Both the Plastic and rubber belong to the macromolecule material. It is mainly combined by the carbon and the hydrogen, together with tittle atoms of oxygen, nitrogen, chlorine, silicone, fluorin, sulphur. It has the special performance and usage. In the normal temperature, the plastic is hard solid, and can not stretch. However, the rubber is not too hard, with the elastic and can be stretch. It can come back to the previous shape after stretched. That¡¯s because of their molecular structure different. The other different point is that the plastic can be directly recircle used by many times, but the rubber, non-directly recircle used, should be produced it to be the recircle rubber. The form of plastic in 100 degree to 200 degree is similar with the form of rubber in 60 degree to 100 degree. Plastic is not including rubber.