- #1
Laurencet
- 10
- 0
Why do metalised film helium balloons only last about a week?
Could I improve this result and make a balloon float for a year? (and don't cheat and say just make it bigger) how do I stop it leaking?
Are there any better materials to make it from? (unlimited budget)
As I understand aluminium should have a permeability of virtually zero, Is the problem that they normally made from a metalized plastic and there are gaps in the aluminium? Does this leave voids in the material itself?
If I made if from a multilayer thicker foil would this be better?
What about the heat-sealed joints will the gas seep through 5mm of molten mylar or LDPE? (surely the area and leak path is tiny)
I guess the last thing is the knot, Could I heat seal it?
Could I improve this result and make a balloon float for a year? (and don't cheat and say just make it bigger) how do I stop it leaking?
Are there any better materials to make it from? (unlimited budget)
As I understand aluminium should have a permeability of virtually zero, Is the problem that they normally made from a metalized plastic and there are gaps in the aluminium? Does this leave voids in the material itself?
If I made if from a multilayer thicker foil would this be better?
What about the heat-sealed joints will the gas seep through 5mm of molten mylar or LDPE? (surely the area and leak path is tiny)
I guess the last thing is the knot, Could I heat seal it?