Lighter than air balloon made from a biaxially oriented polyester film
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United States of America Patent
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Mar 19, 2013
Grant Date -
Jan 22, 2009
app pub date -
Sep 2, 2008
filing date -
Jun 7, 2006
priority date (Note) -
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Abstract
A long life balloon formed from a lamination. The lamination includes a polyester film with a total thickness of 4 μm to 12 μm. The polyester film includes a biaxially oriented polyester core layer and at least one amorphous copolyester skin layer. The lamination also includes a sealant layer and a gas barrier layer on an opposite side of the polyester film from the sealant layer. The oxygen transmission rate of the balloon is less than 0.1 cc/100 sqin/day, a bonding strength of the gas barrier layer to the surface of the polyester film is more than 300 g/in at dry conditions, a sealing strength of the balloon is more than 3.5 kg/in, and a floating time of the balloon is more than 20 days.
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