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EXHIBIT 12.1


Polypore International, Inc.


Ratio of Earnings to Fixed Charges


|                    |                                                                                  |             |     |                 |           |  |             |        |  |  |             |        |  |                 |     |        |      |  |     |         |   |  |     |         |  
|------------------- | -------------------------------------------------------------------------------- | ----------- | --- | --------------- | --------- |  | ----------- | ------ |  |  | ----------- | ------ |  | --------------- | --- | ------ | ---- |  | --- | ------- | - |  | --- | ------- | -
|                    |                                                                                 
|                    |                                                                                  | Predecessor |     |                 | Successor | 
|                    |                                                                                  |             |     |                 |           | 
|                    |                                                                                  |             |     | 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 |      |  | $   | (27,918 | ) |  | $   | (11,568 | )
|                    | Fixed charges                                                                    |             |     | 15,398          |           |  |             | 21,961 |  |  |             | 22,828 |  |                 |     | 6,587  |      |  |     | 43,315  |   |  |     | 83,255  |  
|                    |                                                                                  |            
|                    | Earnings as adjusted                                                             |             |     | 55,030          |           |  |             | 50,195 |  |  |             | 86,922 |  |                 |     | 47,105 |      |  |     | 15,397  |   |  |     | 71,687  |  
|Fixed charges:      |                                                                                  |             |     |                 |           |  |             |        |  |  |             |        |  |                 |     |        |      |  |     |         |   |  |     |        
|                    | Interest expense, net                                                            |             |     | 14,125          |           |  |             | 20,862 |  |  |             | 21,521 |  |                 |     | 6,048  |      |  |     | 42,098  |   |  |     | 81,988  |  
|                    | 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  |      |  |     | 43,315  |   |  |     | 83,255  |  
|Fixed charges ratio |                                                                                  |             | 3.6 | x               |           |  | 2.3         | x      |  |  | 3.8         | x      |  |                 | 7.2 | x      |      |  | 0.4 | x       |   |  | 0.9 | x      
|