In order to Maintain aerobic metabolism of platelet in the bag, high gas permeability is one of the most important factors for platelet storage bags. The newly developed material UPX-80 has much higher gas permeability than currently available platelet storage bags and it allows to Maintain an optimum pH balance during storage.

JMS new platelet storage bag with UPX-80 intends to Maintain large amount of platelets over 4.0 x 10 cells for at least 5 days. After 5 days storage in UPX-80, the indexes of platelets are kept in very good condition.