Tom Baker Posted October 12, 2015 Report Share Posted October 12, 2015 Based on my Flight Design composite training I agree with Corey on this. Flox is used when you want to add strength to the resin, and Cab-o-sil is just a thickening agent used to keep the resin from running. Link to comment Share on other sites More sharing options...
Anticept Posted October 12, 2015 Report Share Posted October 12, 2015 Above 3:1 ratio (if I recall correctly), usually any additives weaken the ability to create a bond, but flox is basically small fibers which increase the strength before it decreases. Cab-o-sil on the otherhand is silicate particles and functions similarly to microballoons, and as tom said, it keeps it from running, but to compound on that, it also serves to make filler material lighter but weaker except in compression. Link to comment Share on other sites More sharing options...
Roger Lee Posted October 12, 2015 Report Share Posted October 12, 2015 I can see flox giving it crush strength, but not extra tensile (pulling apart strength). It would give it more body. Link to comment Share on other sites More sharing options...
Anticept Posted October 13, 2015 Report Share Posted October 13, 2015 Flox gives a little bit more tensile strength in the right ratios. Chopped fibers even more so (flox is tiny chopped fibers). The fibers stop a single shear line from forming in the epoxy. Link to comment Share on other sites More sharing options...
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