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Medical gas barrier film and medical bag using the same

  • US 7,914,867 B2
  • Filed: 10/13/2005
  • Issued: 03/29/2011
  • Est. Priority Date: 10/18/2004
  • Status: Active Grant
First Claim
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1. A medical gas barrier film comprising a multilayer gas barrier film and a multilayer substrate film adhered to the multilayer gas barrier film, whereinthe multilayer gas barrier film has a three-layer structure consisting of three layers, which structure includes a deposition oriented polyester layer having a deposited layer of alumina on one surface thereof, an oriented polyamide layer adhered to a surface of the deposited layer of alumina on the one surface of the deposition oriented polyester layer and a polyethylene layer adhered to a surface of the oriented polyamide layer on the opposite side to the surface of the oriented polyamide layer adhered to the deposited layer of alumina,the multilayer substrate film has a five-layer structure formed by laminating a heat sealing layer, a first elastomer layer, a cyclic olefin polymer layer, a second elastomer layer and a polyethylene layer in this order, anda surface of the multilayer substrate film on the side of the polyethylene layer is adhered to a surface of the deposition oriented polyester layer of the multilayer gas barrier film opposite to said one surface of the deposition oriented polyester layer.

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