A History of Quality, Reliability and Innovation

Until the mid 1930s, the plates of lead acid storage batteries were insulated from each other by a variety of materials such as flannel, strips of glass, and finally wood. Utilizing its extensive rubber chemistry and compounding knowledge, the American Hard Rubber Company developed the ACE-SIL® Microporous Rubber Separator in 1934, revolutionizing the industry.

In 1953, the American Hard Rubber Company formed the Amerace Corporation, and since then, the use of industrial rubber battery separators has grown steadily. Amerace introduced FLEX-SIL® in 1978, a natural rubber/synthetic silica separator cross-linked by an electron beam. The next product created was MICROPOR-SIL® in 1987, a separator that imparts low electrical resistance and is produced by coating glass fiber mat with synthetic silica/polymeric emulsion.

Amerace, Microporous Products, L.P.'s latest products combine the proven reliability of rubber with the versatility of polyethylene. They are CellForce®, a rubber/polyethylene separator, and traditional polyethylene separator. These new products are now produced in a new 30,000 square-foot plant erected in Piney Flats, TN.