For synchronous belt this at the time of application need to be continually by friction, and are doomed to in the process of using a certain damage and need to replace the new product to replace the use of products, all need to have a certain performance advantages, can only at the time of actual application, fully meet their application needs, and to show the good application effect. First of all, the synchronous belt is because at the time of actual application, need to constantly in the process of continuous high-speed friction, and need to have good wear resistance, ability won't because it's easy to have a friction damage, and cannot be used very long. Secondly, the synchronous belt need to have very good heat resistance, can at the time of application, in the case of high temperature caused by continuous running, still will not appear because of the high temperature burn, then there is a possibility of long term applications. In addition, the synchronous belt need to have good oil resistance, will be at the time of application, not vulnerable to adverse impact of the lubricating oil used in the equipment. Finally, the synchronous belt need to be very good ageing resistance, can only be in the process of application of high speed friction, still can maintain good structure and performance, in such a state, the product can apply for a long time.