LIGHTER THAN AIR BALLOONS

摘要

A lighter than air balloon constructed from a flexible film material which has coated one or more of its interior or exterior surfaces thereon a barrier material which is not a pure metal and which has an oxygen transmission rate of less than 0.5 cm?/100 in?/24 hr. at 75.degree.F, 65 relative humidity, said balloon being able to float when inflated with a lighter than air gas and a process for producing the balloon is provided.