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Graph of Permeation Rate




              Permeation
                      Rate                                     Chemical
               /min / cm   2                                                                     Test
                         2.0                                   Permeati                                                     Volume


                                                                      ng                   “Breakth                       Permeate
                                                  FIRST                                      rough”
                                                               for 180M
                         1.5                 “Breakthr                                        300 M                                d



                                                 ough”                                                                            At



                         1.0                     120M                                                                     “Breakthr
                                                                                                                              ough”






                          0.5









                                         60           120          180           240              300            360           420             480


                                                                                                                                          Time
   111   112   113   114   115   116   117   118   119   120   121