I didn't catch the vacuum sealed portion of your post.
It sounds like you have prepared your packets better than the large popcorn producers of portion packs that are not vacuum packed, and indeed are not even air tight, sometimes. There are numerous arguments for and against storage in the refrigerator, but, we suggest the guidelines of The Popcorn Board (www.popcorn.org
) and agree that the air inside refrigerators is dryer than normal household conditions and does nothing to help prevent the popcorn from drying out.
Text from popcorn.org website: "Storage Tips
Without moisture -- (13.5 percent to 14 percent per kernel is needed) -- popcorn can't pop. That's why it's important to store popcorn correctly. An entire percentage of moisture can be lost if your kernels are left uncovered on a hot day. And though that may not sound like a lot, it adds up. A loss of 3 percent can render popcorn unpoppable. And even a 1 percent drop in moisture will harm the quality of your kernels.
So what's the best way to store popcorn? Airtight containers -- plastic or glass -- are your best bet to avoid moisture loss, especially when stored in a cool place like a cupboard. Avoid the refrigerator. Some say the cold storage makes the popcorn taste better, but many refrigerators contain little moisture and can dry out kernels."