Composite material for balloon and balloon made thereof
First Claim
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1. A buoyant balloon comprising a composite material which is transparent and which has a maximum helium gas transmission rate of 5 ml/m2 ·
- 24 hrs·
atm, said composite material comprising a plastic base layer comprising at least one member selected from the group consisting of nylon film, nylon film coated with a vinylidene chloride resin, polyester film, polyethylene terephthalate film coated with a vinylidene chloride resin, polypropylene film, ethylene-vinyl alcohol copolymer film, polyethylene film, polyvinyl alcohol film, and polyvinylidene chloride film and a transparent thin layer of silicon oxide provided on one surface of the plastic base layer, said silicon oxide layer having an atomic ratio of silicon to oxygen of 1;
0.3 to 2.
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Abstract
A composite material for a balloon having a transparency and a gas barrier, including a polymer base layer and a transparent thin layer of a silicon oxide provided on one surface of the polymer base layer, the silicon oxide layer having an atomic ratio of silicon to oxygen of 1:0.3 to 2. The composite material has a high degree of barrier to helium gas or hydrogen gas. A balloon produced from the composite material retains its buoyancy for a long period of time.
41 Citations
8 Claims
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1. A buoyant balloon comprising a composite material which is transparent and which has a maximum helium gas transmission rate of 5 ml/m2 ·
- 24 hrs·
atm, said composite material comprising a plastic base layer comprising at least one member selected from the group consisting of nylon film, nylon film coated with a vinylidene chloride resin, polyester film, polyethylene terephthalate film coated with a vinylidene chloride resin, polypropylene film, ethylene-vinyl alcohol copolymer film, polyethylene film, polyvinyl alcohol film, and polyvinylidene chloride film and a transparent thin layer of silicon oxide provided on one surface of the plastic base layer, said silicon oxide layer having an atomic ratio of silicon to oxygen of 1;
0.3 to 2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 24 hrs·
Specification