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EXHIBIT 12.1


Polypore, Inc.


Ratio of Earnings to Fixed Charges


|                    |                                                                                          |                 |     |                 |                  |  |             |        |  |  |             |        |  |                 |     |        |      |  |     |         |   |  |     |        | 
|------------------- | ---------------------------------------------------------------------------------------- | --------------- | --- | --------------- | ---------------- |  | ----------- | ------ |  |  | ----------- | ------ |  | --------------- | --- | ------ | ---- |  | --- | ------- | - |  | --- | ------ | 
|                    |                                                                                         
|                    |                                                                                          | Pre-Transaction |     |                 | Post-Transaction | 
|                    |                                                                                          |                 |     |                 |                  | 
|                    |                                                                                          |                 |     | January 4, 2004 |                  |  | May 2, 2004 |        |  | 
|                    |                                                                                          |                 |     | through         |                  |  | through     |        |  | 
|(in thousands)      |                                                                                          | 2001            |     |                 | 2002             |  |             | 2003   |  |  | May 1, 2004 |        |  | January 1, 2005 |     |        | 2005 | 
|                    |                                                                                         
|Earnings:           |                                                                                          |                 |     |                 |                  |  |             |        |  |  |             |        |  |                 |     |        |      |  |     |         |   |  |     |       
|                    | Pretax income before extraordinary items and cumulative effect
    of accounting changes |                 | $   | 39,632          |                  |  | $           | 28,234 |  |  | $           | 64,094 |  |                 | $   | 40,518 |      |  | $   | (21,584 | ) |  | $   | 11,969 | 
|                    | Fixed charges                                                                            |                 |     | 15,398          |                  |  |             | 21,961 |  |  |             | 22,828 |  |                 |     | 6,587  |      |  |     | 39,048  |   |  |     | 61,123 | 
|                    |                                                                                          |                
|                   
|                    | Earnings as adjusted                                                                     |                 |     | 55,030          |                  |  |             | 50,195 |  |  |             | 86,922 |  |                 |     | 47,105 |      |  |     | 17,464  |   |  |     | 73,092 | 
|Fixed charges:      |                                                                                          |                 |     |                 |                  |  |             |        |  |  |             |        |  |                 |     |        |      |  |     |         |   |  |     |       
|                    | Interest expense, net                                                                    |                 |     | 14,125          |                  |  |             | 20,862 |  |  |             | 21,521 |  |                 |     | 6,048  |      |  |     | 37,831  |   |  |     | 59,856 | 
|                    | Interest portion of rental expense                                                       |                 |     | 1,273           |                  |  |             | 1,099  |  |  |             | 1,307  |  |                 |     | 539    |      |  |     | 1,217   |   |  |     | 1,267  | 
|                    |                                                                                          |                
|                   
|                    | Fixed charges                                                                            |                 |     | 15,398          |                  |  |             | 21,961 |  |  |             | 22,828 |  |                 |     | 6,587  |      |  |     | 39,048  |   |  |     | 61,123 | 
|                   
|Fixed charges ratio |                                                                                          |                 | 3.6 | x               |                  |  | 2.3         | x      |  |  | 3.8         | x      |  |                 | 7.2 | x      |      |  | 0.5 | x       |   |  | 1.2 | x     
|