I followed this with a squirt of water to hopefully keep the valve stem from getting glued shut (which worked, BTW). Then I dismounted (demounted? unmounted?) the tire and squirted 17 grams* of HiFloat into the tube thru the valve stem. I monitored the deflation rate over several days. I installed a Michelin latex inner tube in a 23mm tire and inflated it to 100 psi. What about at higher pressures, like in inner tubes? This is all occurring at the relatively low pressures encountered in balloons.
…so my initial tests, as previously reported, showed that CO2 leaks through a latex balloon much much faster than air. Maybe it’s in HiFloat to make it taste better? Any chemists reading this? Maybe the “high oxygen and aroma barrier” property will help a latex inner tube hold CO2 or air.ĭextrose Monohydrate is apparently a glucose source used as an ingredient in intravenous feeding solutions. It is ductile but strong, flexible, and functions as a high oxygen and aroma barrier.” It has no odor and is not toxic, and is resistant to grease, oils, and solvents. It is effective in film forming, emulsifying, and has an adhesive quality. “ Polyvinyl alcohol, also known as PVOH, PVA, or PVAL, is a synthetic polymer that is soluble in water. I stumbled across a Material Safety Data Sheet for Ultra HiFloat, which lists the ingredients as: Water, Polyvinyl Alcohol, and Dextrose Monohydrate. Well, I received my HiFloat and I’ve done some tests, but first… In our last episode of Esoteric Observations on Bicycles and Cycling I used latex balloons to demonstrate that carbon dioxide leaks through latex faster than air, and I promised to test Ultra Hifloat (a helium balloon life extending product) to see if it could decrease the flow of CO2 through latex, as soon as Amazon delivered my Ultra HiFloat. A latex inner tube is kind of like a balloon, and air is kind of like helium, so I wonder if Ultra HiFloat helium balloon life extender will help a latex inner tube hold air longer.
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