The materials conveyed by heat-resistant conveyor belt are generally materials with certain temperature. The coating adhesive of heat-resistant conveyor belt is in direct contact with high-temperature materials, so the wear resistance, adhesion and bending wear resistance of the coating adhesive are very high. The rubber coating formula of ordinary conveyor belt can not meet the requirements and is directly exposed to high temperature materials. The preferred material formulation of coating adhesive is to maintain stable physical properties in high temperature environment. Next, I'd like to introduce the heat-resistant coating formula material of Jingbo rubber conveyor belt.

　　1. 主要材料，普通输送带的包覆胶主要是天然橡胶，或少量添加SBR。SBR是耐高温输送带包胶的主要原料。SBR包胶的碳化层具有较好的耐热性和耐老化性。三元乙丙橡胶也可用作覆盖材料。经博橡胶多年生产经验，在epdm橡胶中作为一种覆盖胶原的材料，对覆盖胶的抗氧化性和耐热性都很好，缺点是地核和覆盖胶的胶结度不够，碳化形成缓慢。

　　1. Main materials, the coating rubber of ordinary conveyor belt is mainly natural rubber, or a small amount of SBR is added. SBR is the main raw material of high temperature resistant conveyor belt. The carbonized layer of SBR coating has good heat resistance and aging resistance. EPDM can also be used as a covering material. After years of production experience, EPDM rubber, as a kind of collagen covering material, has good oxidation resistance and heat resistance to the covering rubber. The disadvantage is that the cementation of the core and the covering rubber is not enough, and the carbonization is slow.

　　2. 硫化系统一般采用普通硫，橡胶中多硫键较多，但在热氧老化阶段性能迅速下降，碳化层在形成前已失去其价值。耐热输送带更好采用硫体，使橡胶材料中单硫键和双硫键的比例达到90%，热氧老化阶段的性能不降低，可形成碳化层。另外，为了保持碳化层开裂均匀，应适当增加氧化锌的用量，以提高橡胶的导热性。

　　2. ordinary sulfur is generally used in the curing system, and there are many polysulfide bonds in the rubber, but the performance of the vulcanization system declines rapidly in the hot oxygen aging stage, and the carbonization layer has lost its value before it is formed. Sulfur body is the best choice for heat-resistant conveyor belt, which can make the ratio of single sulfur bond and double sulfur bond in rubber material reach 90%. The performance of heat oxygen aging stage will not be reduced, and carbonization layer can be formed. In addition, in order to keep the cracking uniformity of the carbonized layer, the amount of zinc oxide should be increased properly to improve the thermal conductivity of the rubber.

　　3.炭黑是碳化层的主要成分，对碳化层的质量起着重要的作用。炭黑用量越高，碳化层的使用寿命越长。炭黑用量为67份时，碳化层的使用寿命更长。

　　3. Carbon black is the main component of carbonation layer, which plays an important role in the quality of carbonation layer. The higher the carbon black content is, the longer the service life of the carbonized layer is. When the amount of carbon black is 67 phr, the service life of carbonized layer is the longest.

　　4. 防护系统需要抗老化剂BLE和RD。当抗老化剂BLE达到1.5,RD达到0.8时，碳化层的使用寿命更长。

　　4. protection system requires anti-aging agents BLE and RD. When the anti-aging agent BLE reaches 1.5 and RD reaches 0.8, the carbonization layer has the longest service life.