I make hand made greeting cards. How do i make the plastic packaging that goes around the card & envelope?

I have the plastic wrapping on a roll, but don't know how seal it to create a pocket. Any ideas?

I make hand made greeting cards. How do i make the plastic packaging that goes around the card %26amp; envelope?
I have never tried to make mine but I would think that you can use the same stuff that is used for making gift baskets and use a hair dryer or a heat gun. I would check that out at your local hobby/craft store to see if they carry it.
Reply:I bought a kitchen vaccum sealer ( for foods) I use it for all my cards.