STRETCHABLE AND FORMABLE LIGHTER THAN AIR BALLOONS MADE FROM A BIAXIALLY ORIENTED POLYESTER FILM

摘要

Described are stretchable and formable lighter than air balloons including a high barrier lamination. The stretchable and formable balloons stretch when overinflated instead of failing. The balloons are formed from a lamination including a polyester film with a total thickness of 4 mum to 12 mum including a biaxially oriented polyester core layer and at least one amorphous copolyester skin layer. The polyester film has an Elongation % in the transverse direction (TD) or machine direction (MD) of greater than 125%.