Plastic film having oxygen absorbing function and infusion bag

A plastic film used for a medical container which is composed at least of five layers, formed by a water-cooling inflation method of co-extrusion, and has an oxygen absorbing function, comprising in order from an outermost layer:

• a first layer that contains a polyamide obtained from a ring-opening polymerization of a lactam having 11 or more carbon atoms or from polycondensation of an ω-amino acid having 11 or more carbon atoms, or a polyamide obtained from copolycondensation of a dicarboxylic acid having 10 or more carbon atoms and a diamine having 6 or more carbon atoms, wherein the first layer is the outermost layer;
• a second layer that is adjacent to the first layer and contains a copolymer of an α-olefin and a monomer of an unsaturated carboxylic acid or an anhydride of an unsaturated dicarboxylic acid as the major component;
• a third layer that is adjacent to the second layer and contains as the main component an ethylene vinyl alcohol copolymer and as accessory components a transition metal salt and a polyene-based polymer having an unsaturated double bond;
• a fourth layer that is adjacent to the third layer and contains a copolymer of an α-olefin and a monomer of an unsaturated carboxylic acid or an anhydride of an unsaturated dicarboxylic acid as the major component;
• and
• a sealing layer that that contains a polyethylene as the main component.