Buy, Sell, or Hold Polypore?

What's thicker than water or blood? For Polypore International (NYSE: PPO ) , battery acid. Polypore makes a variety of high-tech filters related to blood and water filtration, as well as battery membranes. And the Lenovo T61 Battery stock returned almost 7% this year TOSHIBA PA3534U-1BRS Battery compared to -4% for the S&P 500. But will Polypore continue to reap the rewards of supplying specialized sieves? Let's look at why you might want to buy, sell, or hold Polypore today.
Buy:

Market leader in resilient and growth industries. Polypore reigns at or near the top of its markets, which include membranes for lithium and lead-acid batteries, blood filtration used in dialysis and other procedures, and water PA3465U-1BRS filtration for industrial production. Lithium batteries are used in everything from phones to laptops to electric cars -- and that market is expected to increase demand at least 10% per year through 2015. Polypore's medical market is expected to increase at least 6% per year, and its water filtration, used to purify water for everything from food Latitude D610 battery



processing to making flat-panel displays, is expected to grow 8% annually.
The battery separator market provides Polypore's largest share of revenue, last quarter making up 77%. This helps Polypore insulate itself from economic slowdowns, because, as CEO Robert Toth described: