How long do mylar balloons stay firmly inflated?
How long do mylar balloons last? | Share with a friend or pin for later!
Can a mylar balloon stay firmly inflated for years, or is its life much shorter? THIS APPEARS TO BE A NON- HELIUM BALLOON.
How long do mylar balloons last?
To answer Marc's question, let's first look at non helium foil balloons, i.e. mylar balloons filled with air. Thanks to the many comments from my readers we can confidently say that mylar balloons last a long time, anything from a couple of years to 10, 15, 20 and even 30 years
That's quite impressive! And it seems they stay firmly inflated for all these years, looking as plump and round as they did on day one.
These mylar balloons remind their owners of the happy moments when they received the balloon, for example of the birth of their son or daughter, the first date with their spouse or their own birthday as a child!
Special thanks to Doctor D. who explained why mylar balloons stay inflated for so long. He wrote:
"Mylar and foil balloons are made of a non-porous surface unlike latex balloons that lose gas through the surface and entrance/exit port.
If you glue or seal the opening of the mylar/foil balloon it can stay filled indefinitely for the life of the material which would be thousands if not millions of years.
So these experiences with 30 year old inflated mylar balloons just mean that the knot in the entrance/exit port is either sealed completely or really tight so that gas is exiting extremely slowly."
Does this apply to helium filled balloons as well, I wonder?
How long do mylar HELIUM balloons last?
Helium molecules are smaller than air molecules. That's why latex
balloons filled with helium deflate quicker than air-filled balloons. It stands to reason that the same applies to helium filled foil
Most resources talk about a float time of 3 to 5 days
for a standard size 18 to 21 inch helium mylar balloon. Some people claim they'll float for up to a few weeks, and I've read about one experiment where the helium foil balloon lasted for 70 days
. Unfortunately the blog post has no pictures.
The larger the balloon, the longer it will usually float. The environment plays a role too. In general, all types of inflated balloons last longer
indoors with consistent air temperatures and no direct sunlight exposure.
For more first hand experiences with how long mylar balloons stay firmly inflated, browse through the comments below.