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Composite material for balloon and balloon made thereof

  • US 5,279,873 A
  • Filed: 10/31/1991
  • Issued: 01/18/1994
  • Est. Priority Date: 11/02/1990
  • Status: Expired due to Fees
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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