EPDM耐热输送带基础配方研究

Research on the EPDM Formulation Used as the Covering Layer of the Heat Resistant Conveyor Belt

利用正交设计方法考察了胶种配比及用量、硫化剂用量、补强剂类型及用量等对EPDM胶料性能的影响。研究表明:胶料配比及用量是影响EPDM正硫化时间、撕裂强度及断裂伸长率等性能的关键因素;而影响EPDM拉伸强度的关键因素是过氧化二异丙苯(DCP)用量。燕山石化公司生产的EPDM 3240更适于研制EPDM耐热输送带。硫化剂DCP的最佳用量为6phr(每100g橡胶中所含的该原料的质量);补强剂最好采用耐磨炭黑N330,且其最佳用量为50phr。优化配方的综合物理机械性能较好,其拉伸强度可达到12MPa以上,可用作耐热输送带覆盖胶的基础配方。

The effects of the type and content of rubber,the content of curing agent,the type and content of reinforcing agents used on the properties of EPDM rubbers were studied by using the orthogonal design method in this paper.It was proved that the type and content of rubber is the crucial factor that affects the vulcanization time,tear strength and the elongation at break of the EPDM rubber.The tensile strength of the EPDM rubber is mainly affected by the content of DCP in the recipe.EPDM 3240,manufactured by Yanshan Petroleum Chemical Limited,is more suitable for the preparation of the cover coat rubber of the heat resistant conveyor belts.The optimal content of DCP is 6phr.The black carbon N330 is the best reinforcing agent and the optimal content of N330 is 50phr.The tensile strength of the optimized EPDM rubber is more than 12 MPa which can be used as the basic recipe of the formula resistant conveyor belts.