Research and Application on Formulation Technology for Natural Rubber Damping Function with Low Dynamic and Static Stiffness Ratio

Abstract： This paper studies in detail the effects of natural rubber formula of different models, rubber vulcanization system and reinforcing the filling system and lubricating system on dynamic and static stiffness of sulfide products, analyzes and studies the effects of the model, with the amount of various materials, mixing and processing and vulcanization process factors on reducing dynamic and static stiffness ratio effect. The results show that the standard static/dynamic stiffness ratio of semi-effective curing system and peroxide curing system can reach below 1.2 at 25 Hz frequency. However, the fatigue performance of peroxide-vulcanized rubber products is poor, while the semieffective vulcanized rubber products can not only reach standard dynamic/static stiffness ratio of below 1.2 at 150 Hz, but also reach the fatigue performance of 1 million times. On the other hand, the ratio of dynamic/static stiffness of rubber material is also related to the hardness of vulcanized rubber. With the increase of hardness, the filling rate rises, the ratio of rubber content in the formula inevitably decreases, and the ratio of dynamic/static stiffness increases. The application of low dynamic/static stiffness ratio natural rubber damping function formula is a comprehensive technology. In the design process of damping system, product structure factors, product assembly factors and product bearing capacity factors should be fully considered to ensure that the rubber hardness is within the design definition range of Shore A/3 s 45~55 degree, to enable low dynamic/static ratio natural rubber formula technology to achieve a scientific design and reasonable application level. At present, the technology research results have been successfully applied to our company’s related cutting-edge damping products. Key words: Natural rubber, Low static and static stiffness formula, Research and development, Application作者简介：李国洪（1974—），男，学士学位，研究方向为汽车非金属材料。

参考文献引用格式：

李国洪，向忠益，郭森.低动静刚度比天然橡胶减振功能配方技术研究和应用[J].汽车工艺与材料, 2022（4）: 39-45.

LI G H, XIANG Z Y, GUO S. Research and Application on Formulation Technology for Natural Rubber Damping Function with Low Dynamic and Static Stiffness Ratio [J]. Automobile Technology & Material, 2022(4): 39-45.