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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)      |                                                                                          | 2000            |     |        | 2001             |  |     | 2002   |  |  | 2003 |        |  | May 1, 2004 |     |        | January 1, 2005 | 
|                    |                                                                                         
|Earnings:           |                                                                                          |                 |     |        |                  |  |     |        |  |  |      |        |  |             |     |        |                 |  |     |        |  |  |     |        
|                    | Pretax income before extraordinary items and cumulative effect
    of accounting changes |                 | $   | 35,499 |                  |  | $   | 39,632 |  |  | $    | 28,234 |  |             | $   | 64,094 |                 |  | $   | 40,518 |  |  | $   | (21,584 | )
|                    | Fixed charges                                                                            |                 |     | 19,563 |                  |  |     | 15,398 |  |  |      | 21,961 |  |             |     | 22,828 |                 |  |     | 6,587  |  |  |     | 39,048  |  
|                    |                                                                                          |                
|                   
|                    | Earnings as adjusted                                                                     |                 | $   | 55,062 |                  |  | $   | 55,030 |  |  | $    | 50,195 |  |             | $   | 86,922 |                 |  | $   | 47,105 |  |  | $   | 17,464  |  
|                    |                                                                                          |                
|                   
|Fixed charges:      |                                                                                          |                 |     |        |                  |  |     |        |  |  |      |        |  |             |     |        |                 |  |     |        |  |  |     |        
|                    | Interest expense, net                                                                    |                 | $   | 18,193 |                  |  | $   | 14,125 |  |  | $    | 20,862 |  |             | $   | 21,521 |                 |  | $   | 6,048  |  |  | $   | 37,831  |  
|                    | Interest portion of rental expense                                                       |                 |     | 1,370  |                  |  |     | 1,273  |  |  |      | 1,099  |  |             |     | 1,307  |                 |  |     | 539    |  |  |     | 1,217   |  
|                    |                                                                                          |                
|                   
|                    | Fixed charges                                                                            |                 | $   | 19,563 |                  |  | $   | 15,398 |  |  | $    | 21,961 |  |             | $   | 22,828 |                 |  | $   | 6,587  |  |  | $   | 39,048  |  
|                    |                                                                                          |                
|                   
|Fixed charges ratio |                                                                                          |                 | 2.8 |        |                  |  | 3.6 |        |  |  | 2.3  |        |  |             | 3.8 |        |                 |  | 7.2 |        |  |  | 0.5 |        
|                    |                                                                                          |                
|