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                                       (TEFLON)                          (KEL-F)
Property      Method        Units        PTFE   FEP     PFA    ETFE   ECTFE    PCTFE   PVDF
                                                     
Specific       D792           -          2.17   2.15    2.15   1.74   1.7      2.12    1.78
Gravity
                                                     
Melting        D223         deg F        621    518     581    527    464      410     352
Point          
                                           
 Tensile        D638         psi          2,900  4,350   4,570  6,960  6,960    6,060   7,830
Strength                                                     
                                                          
  Yield          D638         psi          1,450  1,740   2,250  3,480  4,500    5,800   6,670
Strength                                                     
                                                           
  Elongation                   %           200-5  250-3   300    200-5  200-3    80-25   20-15
                    
Tensile        D638         psi          87     72.5    101.5  217.5  240      218     348
Modulus 
                                                    
  Flex           D790         psi          98     101.5   95     203    261       -      333.5
Modulus 
                                                    
Izod Impact    D256         ft-lbs/in    3.2     -       -      -      -        -      2-4
                                                
                                                         
Hardness     D224         Shore D       60     57      62     75     75        90       79
                                                   
Heat DT,       D648         @66psi deg C   250    158   164    219    240      248      300
                                                  
Heat DT,       D648         @66psi deg C   122    129   118    160    169       -       239