Usage of Low Viscosity HNBR Polymers to Increase Productivity In High Shear Molding Methods

With ever increasing emphasis on cost savings, today’s molded goods manufacturers are working continuously to develop process technologies that reduce expense and enhance production output. The development of a new generation of HNBR elastomers with a modified molecular weight distribution provides an innovative solution in the quest for improvement in molded part fabrication. These new elastomers demonstrate market validated processability improvements, while maintaining high mechanical strength and compression set resistance. This improvement in compound processability lends itself to the injection molding process, resulting in improved productivity and reduced manufacturing costs. 

This paper will show that this next generation of HNBR elastomers has the necessary processing characteristics to achieve improved productivity, which comes from taking full advantage of reducing the heat generation caused by high shear in the injection molding process. Details of this improvement will be confirmed by analysis of various rheological test methods and by demonstrating the relationship between these tests and the molding process.