Expanders are an essential component of the negative plates of lead-acid batteries. They increase the surface area and stabilize the structure of the negative active material. They can be added to the ne. Expanders are materials that are added to the negative plates of lead-acid batteries to improve t. Expanders are always introduced into the negative active-material during the paste-mixing process. They were first developed in the 1940s and at that time the separate components wer. The principal reasons why battery manufacturers have adopted pre-mixed expanders is that this simplifies the process and reduces the risks and cost associated with the earlier m. The most important processes in expander manufacturing are mixing and packaging. In the mixing operation, the individual components are usually blended in a ball mill or high inten. Since expander manufacturers purchase materials in much greater quantities than individual battery manufacturers, they can obtain the materials at lower cost. Large-volume manufact.
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