CHARLOTTE, N.C., April 4, 2011 (GLOBE NEWSWIRE) -- Polypore International, Inc. (NYSE:PPO) will release its first quarter 2011 financial results after U.S. markets close on Wednesday, May 4, 2011.

Robert Toth, President and CEO, and Lynn Amos, Chief Financial Officer, will host a conference call to review and discuss those results beginning at 9:00 am Eastern time on Thursday, May 5, 2011. The dial-in number for the conference call is (719) 325-2199. Enter code 8552059. A replay of the conference call will be available through Thursday, May 12, 2011 via telephone at (719) 457-0820. Enter code 8552059.

The call will be webcast live and archived for 30 days in the Investor Relations section of the company's web site at http://investor.polypore.net/.

About Polypore International, Inc.

Polypore International, Inc. is a global high technology filtration company specializing in microporous membranes. Polypore's flat sheet and hollow fiber membranes are used in specialized applications that require the removal or separation of various materials from liquids, primarily in the ultrafiltration and microfiltration markets. Based in Charlotte, NC, Polypore International, Inc. is a market leader with manufacturing facilities or sales offices in ten countries serving six continents. See www.polypore.net.

CONTACT: Investor Contact:
         Polypore Investor Relations
         704-587-8886
         investorrelations@polypore.net