Plastic formulations for platelet storage containers and the like

A flexible, collapsible container containing a blood component, the container being capable of being RF sealed, gas, steam and radiation-sterilized and being made from an admixture comprising:

• a) from about 40 to about 90 percent by weight of a polyolefin material selected from the group consisting of polypropylene homopolymers, copolymers including ethylene and propylene units, and blends of polypropylene homopolymers and copolymers including ethylene and propylene units;
• b) from about 3 to about 25 percent by weight of a functionalized block copolymer, the functionalized block copolymer consisting essentially of a central block copolymer molecule including generally equal proportions of ethylene and butylene units, and terminal blocks of polystyrene;
• and
• c) from about 3 to about 20 percent by weight of a nylon;
• the container being gas permeable.