Polypore International (NYSE: PPO) is expected to report Q3 earnings on Oct. 30. Here's what Wall Street wants to see:

The 10-second takeaway
 Comparing the upcoming quarter to the prior-year quarter, average analyst estimates predict Polypore International's revenues will decrease -8.4% and EPS will drop -32.0%.

The average estimate for revenue is $174.2 million. On the bottom line, the average EPS estimate is $0.34.

Revenue details
 Last quarter, Polypore International logged revenue of $185.8 million. GAAP reported sales were 5.4% lower than the prior-year quarter's $196.4 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 Last quarter, non-GAAP EPS came in at $0.51. GAAP EPS of $0.43 for Q2 were 32% lower than the prior-year quarter's $0.63 per share.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Recent performance
 For the preceding quarter, gross margin was 37.8%, 680 basis points worse than the prior-year quarter. Operating margin was 20.6%, 640 basis points worse than the prior-year quarter. Net margin was 11.0%, 400 basis points worse than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $731.9 million. The average EPS estimate is $1.87.

Investor sentiment
 The stock has a three-star rating (out of five) at Motley Fool CAPS, with 229 members out of 256 rating the stock outperform, and 27 members rating it underperform. Among 54 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 47 give Polypore International a green thumbs-up, and seven give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Polypore International is outperform, with an average price target of $48.45.