of the samples the results are shown in table 3 table 3______________________________________ fixation yield 30 sec 60 sec 120 sec ______________________________________f cf cf sub 3 cf sub 2 o sub 3 chfcf sub 3 74 82 93ccl sub 2 ccl sub 2 54 74 71air 61 68 68______________________________________ from the table it is evident that the fluorocarbon is superior at all exposure times to ccl 2 ccl 2 and air in fixation yield this example demonstrates the application to and fixation on polyethylene terephthalate of the bacteriostat of the formula str8 in a process similar to that of example 1 with exposure to heat transfer media for 30 and 60 seconds at temperatures of 160 u00b0 180 u00b0 and 200 u00b0 c the amount of agent fixed was determined by x ray fluorescence the results are shown in table 4 table 4______________________________________ fixation yield temp c u00b0 30 sec 60 sec ______________________________________f cf cf sub 3 cf sub 2 o sub 3 chfcf sub 3 160 81 88cl sub 2 c ccl sub 2 160 68 84air 160 55 69f cf cf sub 3 cf sub 2 o sub 3 chfcf sub 3 180 48 92cl sub 2 c ccl sub 2 180 53 93air 180 48 68f cf cf sub 3 cf sub 2 o sub.